A system and method for monitoring and controlling a plurality of marine seismic devices deployed in a survey operation. A battery monitoring device associated with each marine seismic device monitors one or more battery systems associated with each respective marine seismic device. Each battery monitoring device generates battery data associated with a condition of each battery system and communicates the battery data to a central processor. The central processor analysis the data and identifies individual battery systems or individual marine seismic devices that have anomalous conditions. The anomalous conditions include a battery depletion rate above a threshold or a battery life shorter than the remaining duration of the survey operation. The central processor is configured to generate adjusted control settings for individual marine seismic devices to improve the performance of respective battery systems and to identify whether individual battery systems should be redeployed in a future survey operation or discarded.
G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas
B60L 3/00 - Electric devices on electrically-propelled vehicles for safety purposesMonitoring operating variables, e.g. speed, deceleration or energy consumption
B60L 58/12 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
2.
BATTERY MANAGEMENT SYSTEM FOR MARINE SEISMIC DEVICES
A system and method for monitoring and controlling a plurality of marine seismic devices deployed in a survey operation. A battery monitoring device associated with each marine seismic device monitors one or more battery systems associated with each respective marine seismic device. Each battery monitoring device generates battery data associated with a condition of each battery system and communicates the battery data to a central processor. The central processor analysis the data and identifies individual battery systems or individual marine seismic devices that have anomalous conditions. The anomalous conditions include a battery depletion rate above a threshold or a battery life shorter than the remaining duration of the survey operation. The central processor is configured to generate adjusted control settings for individual marine seismic devices to improve the performance of respective battery systems and to identify whether individual battery systems should be redeployed in a future survey operation or discarded.
G01R 31/3842 - Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
G01R 31/367 - Software therefor, e.g. for battery testing using modelling or look-up tables
G01R 31/371 - Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with remote indication, e.g. on external chargers
G01R 31/392 - Determining battery ageing or deterioration, e.g. state of health
G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas
A transducer assembly for attachment to a marine device for use in marine seismic applications. The transducer assembly includes an attachment portion attachable to the marine device and a transducer portion attachable to the attachment portion. The attachment portion is fabricated with a relative larger diameter and of a first material selected for strength, while the transducer portion of the transducer assembly is fabricated with a relative reduced diameter of a second material selected to minimize interference with acoustic signals propagating to or from the transducer portion. The reduced diameter of the transducer portion reduces the incidence and magnitude of drag during the marine seismic applications and minimizes the negative effects of drag on the results of the marine seismic application. The second material of the transducer portion is selected to have an acoustic impedance that minimizes interference with the operation of a transducer positioned within the transducer portion.
A system and method for monitoring and controlling a plurality of marine seismic devices deployed in a survey operation. A battery monitoring device associated with each marine seismic device monitors one or more battery systems associated with each respective marine seismic device. Each battery monitoring device generates battery data associated with a condition of each battery system and communicates the battery data to a central processor. The central processor analysis the data and identifies individual battery systems or individual marine seismic devices that have anomalous conditions. The anomalous conditions include a battery depletion rate above a threshold or a battery life shorter than the remaining duration of the survey operation. The central processor is configured to generate adjusted control settings for individual marine seismic devices to improve the performance of respective battery systems and to identify whether individual battery systems should be redeployed in a future survey operation or discarded.
G01R 31/3842 - Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
G01R 31/367 - Software therefor, e.g. for battery testing using modelling or look-up tables
G01R 31/371 - Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with remote indication, e.g. on external chargers
G01R 31/392 - Determining battery ageing or deterioration, e.g. state of health
G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas
A transducer assembly for attachment to a marine device for use in marine seismic applications. The transducer assembly includes an attachment portion attachable to the marine device and a transducer portion attachable to the attachment portion. The attachment portion is fabricated with a relative larger diameter and of a first material selected for strength, while the transducer portion of the transducer assembly is fabricated with a relative reduced diameter of a second material selected to minimize interference with acoustic signals propagating to or from the transducer portion. The reduced diameter of the transducer portion reduces the incidence and magnitude of drag during the marine seismic applications and minimizes the negative effects of drag on the results of the marine seismic application. The second material of the transducer portion is selected to have an acoustic impedance that minimizes interference with the operation of a transducer positioned within the transducer portion.
G10K 11/00 - Methods or devices for transmitting, conducting or directing sound in generalMethods or devices for protecting against, or for damping, noise or other acoustic waves in general
G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas
G10K 11/02 - Mechanical acoustic impedancesImpedance matching, e.g. by hornsAcoustic resonators
09 - Scientific and electric apparatus and instruments
Goods & Services
Electronic heading sensors; ultrasonic application measuring and searching machines; digital communication type remote measuring and controlling machines and instruments; computer software (including computer software which is recorded in some recorded media, including CD-ROM's and magnetic discs); depth sensors; acoustic release devices; depth control devices using electronic sensors for use in towing underwater cables; connectors for attaching depth control devices using electronic sensors for use in towing underwater cables to underwater cables; computer software for use in marine seismic surveying and position measuring; measuring apparatus and instruments; electrical communication machines and instruments; electronic machines and instruments and parts thereof, namely underwater positioning systems machines, underwater positioning systems apparatus, underwater positioning systems instruments; digital readout electronic compasses; electronic seismic instrumentation, namely compasses, depth sensors, acoustic positioners; streamer cable position control devices, depth control devices; acoustic ranging systems, namely shipboard support digital signal processing equipment for sensing heading and controlling depth; streamer assemblies for towing by boat; heading sensors; roll sensors; acoustic release mechanisms; transmitters, receivers and transponders and buoys; computer program software for use in seismic surveying; and communication equipment, namely receivers and transmitters; parts and fittings of the aforesaid.
06 - Common metals and ores; objects made of metal
09 - Scientific and electric apparatus and instruments
20 - Furniture and decorative products
42 - Scientific, technological and industrial services, research and design
Goods & Services
Buoys, namely, buoys of metal Electronic heading sensors for determining direction; ultrasonic application measuring and searching machines, namely, ultrasonic flaw detectors ultrasonic sensors, ultrasonic instrumentation for testing machines, ultrasonic object detectors for use on vehicles, and ultrasonic imaging apparatus, not for medical purposes; digital communication type remote measuring and controlling machines and instruments, namely, remote controls for motors, remote control telemetering machines and instruments, remote input-output controller modules, remote sensors for use in measuring thermal and infrared radiation energy waves, remote controls for distance measuring apparatus; recorded and downloadable computer software for use in the collection, editing, organizing modifying, transmission, storage and sharing of data and information in the fields of telecommunications and engineering; depth sensors, namely, sensors for measuring depth, not for medical use; acoustic release devices in the nature of underwater acoustic detecting devices; depth control devices using electronic sensors for use in towing underwater cables; cable connectors for attaching depth control devices using electronic sensors for use in towing underwater cables to underwater cables; recorded and downloadable computer software for use in marine seismic surveying and position measuring; measuring apparatus and instruments, namely compass for measuring, coordinate measuring instruments and machines, derived-unit measuring machines and apparatus, distance measuring apparatus, gasometers, gravity measuring instruments, laser measuring systems, level measuring machines, angle finders, bevels, measuring bowls, measuring buckets, measuring rulers, measuring tapes, pressure measuring apparatus; electrical communication machines and instruments, namely, apparatus for transmission of communication, amplifiers for wireless communications, communication hubs, single-channel radio communication machines and apparatus for fixed stations, and wireless communication devices for voice, data or image transmission; electronic machines and instruments and parts thereof, namely, electronic computers, electronic servo motor controllers, electronic circuit cards, electronic cables, electronic power supplies for driving electric motors, electronic speed controllers; digital readout electronic compasses, namely, compasses for measuring, directional compasses, and magnetic compasses, all with digital readouts; electronic seismic instrumentation, namely, compasses for measuring, depth sensors for measuring depth; acoustic positioners, namely acoustic meters for determining position; Electrical controlling devices, namely, streamer cable position control devices, and depth control devices; acoustic ranging systems, namely, shipboard support digital signal processing equipment for sensing heading and controlling depth; seismic exploration machines and apparatus, namely, streamer assemblies for towing by boat; electric and optical heading sensors; electric roll sensors; acoustic release mechanisms in the nature of underwater acoustic detecting apparatus; transmitters and receivers, namely, satellite receivers and transmitters, radio transmitters and receivers, and wireless transmitters and receivers; transponders; buoys, namely, marker buoys, navigational buoys, radio buoys, and signaling buoys; recorded and downloadable computer program software for use in seismic surveying; communication equipment, namely satellite receivers and transmitters, radio transmitters and receivers, wireless transmitters and receivers, and electronic transmitters and receivers for telecommunications; parts and fittings of the aforesaid Buoys, namely, non-metal buoys Providing online non-downloadable computer software for use in the collection, editing, organizing, modifying, book marking, transmission, storage, and sharing of data and information in the fields of telecommunications and engineering; providing online non-downloadable computer software for use in marine seismic surveying and position measuring; providing online non-downloadable computer program software for use in seismic surveying
09 - Scientific and electric apparatus and instruments
Goods & Services
Electronic heading sensors; ultrasonic application measuring and searching machines; digital communication type remote measuring and controlling machines and instruments; computer software (including computer software which is recorded in some recorded media, including CD-ROM's and magnetic discs); depth sensors; acoustic release devices; depth control devices using electronic sensors for use in towing underwater cables; connectors for attaching depth control devices using electronic sensors for use in towing underwater cables to underwater cables; computer software for use in marine seismic surveying and position measuring; measuring apparatus and instruments; electrical communication machines and instruments; Electronic machines and instruments, namely underwater positioning systems machines, underwater positioning systems apparatus, underwater positioning systems instruments; digital readout electronic compasses; electronic seismic instrumentation, namely compasses, depth sensors, acoustic positioners; streamer cable position control devices, depth control devices; acoustic ranging systems, namely shipboard support digital signal processing equipment for sensing heading and controlling depth; streamer assemblies for towing by boat; heading sensors; roll sensors; acoustic release mechanisms; transmitters, receivers and transponders and buoys; computer program software for use in seismic surveying; and communication equipment, namely receivers and transmitters; parts and fittings of the aforesaid.
9.
WELL MONITORING SYSTEM FOR MONITORING AN SUBSEA, SUB-SURFACE WELL
Embodiments herein describe apparatus, systems and methods adapted to monitor underwater wells, boreholes, drill holes, etc. (subsea wells). Depending on embodiment, the apparatus, systems and methods can be configured to capture sensor readings and/or to monitor status of a target subsea wells.
E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systemsSystems specially adapted for monitoring a plurality of drilling variables or conditions
E21B 47/001 - Survey of boreholes or wells for underwater installations
E21B 49/00 - Testing the nature of borehole wallsFormation testingMethods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
E21B 47/002 - Survey of boreholes or wells by visual inspection
10.
BI-DIRECTIONAL FOIL SYSTEM FOR TOWED MARINE CABLE ARRAY
A foil system is used with a towed marine cable array to provide downward, upward or lateral lift to the array. The foil system can be coupled with the cable and configured to bias the submerged payload toward a target position. The foil system can include a group of foil sections each having a leading edge collectively defining an angle of attack, and a group of through-cables supporting the group of foil sections within the foil system. A subset of through-cables of the group of through-cables are arranged through front halves of the group of foil sections. This subset of through-cables can be selectively tensionable, and manipulatable to define a tensioned one of the subset of through-cables as being offset from a chord that is defined between the leading edge and a trailing edge of any of the foil sections. The foil system can thus induce one or more angles of attack for the group of foil sections, based on a rotational constraint defined by the tensioned one of the through- cables.
Embodiments of the invention provide methods, systems, and apparatus for conserving power while conducting an ocean bottom seismic survey. Sensor nodes placed on an ocean floor may be configured to operate in at least an idle mode and an active mode. Each node may adjust its mode of operation from idle mode to active mode.
A method for compensating a magnetic heading includes one or more of obtaining a magnetic heading from a magnetic instrument deployed with an apparatus, determining location data for the apparatus, determining local field data based on the location data, obtaining a magnetic profile for the magnetic instrument deployed with the apparatus, and compensating the magnetic heading based the magnetic profile. For example, the magnetic profile may be responsive to perturbation of the local geomagnetic field by the apparatus, so that the compensated heading is more responsive to a directional heading of the apparatus, when deployed in the geomagnetic field. An apparatus for performing the method is also described, along with another method for calibrating the magnetic instrument when deployed with the apparatus, in order to generate the magnetic profile.
A marine array having various embodiments of a modular foil system is disclosed. The modular foil system may be configured to generate lift when towed in a marine environment, and thus used to move, position, and/or depress instrument of the array. The modular foil system may include multiple groups of foil sections, each having an angle of attack that is adjustable relative to other groups of foil sections. For example, each group may be supported by a pair of through cables, and an actuator may adjust a tension in one or both of through cables, thereby alerting the angle of attack. The pair of through cables may converge toward one another at connection points adjacent opposing ends of a given group of foil sections of the modular system. The connection points thus establishing a modular framework to couple the given group to other groups of foils of the system.
B63G 9/00 - Other offensive or defensive arrangements on vessels against submarines, torpedoes, or mines
B63B 1/24 - Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydrofoil type
B63B 1/28 - Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydrofoil type with movable hydrofoils
A foil for a towed cable includes a body defining at least two conduits. The body has a foil shape having a leading edge and a trailing edge. The foil shape defines a first surface extending between the leading edge and the trailing edge configured to provide lift. The foil shape defines a second surface opposed to the first surface extending between the leading edge and the trailing edge. The foil shape defines first and second lateral sides that extend between respective lateral edges of the first and second surfaces, the leading edge, and the trailing edge. A first conduit is defined within the forward half of the body adjacent to the leading edge, is open to each of the first and second lateral sides, and is configured to receive a cable therethrough. A second conduit may be defined within the body and filled with buoyant material.
A seismic node deployment system comprises a cable supply with one or more seismic nodes configured for coupling to the cable at one or more attachment locations for deployment to a water column. A node attachment system is configured to drive a portion of the cable into periodic or reciprocal motion so that the attachment speed is substantially reduced relative to the speed at which the cable is deployed.
A streamer device or other system can include a pylon configured to attach to a locking collar, and a latch mechanism with a seat component. The latch mechanism comprises a pin member configured to attach to the locking collar, and a bias component. The seat component can be configured to retain the bias component when the pylon is attached to the locking collar, and the bias component can be configured to bias the pin member to hold the locking collar to the pylon. The bias may responsive to a position of the seat component, or determined or controlled at least in part based on the position.
F16M 11/00 - Stands or trestles as supports for apparatus or articles placed thereon
G01V 1/20 - Arrangements of receiving elements, e.g. geophone pattern
F16G 11/00 - Means for fastening cables or ropes to one another or to other objectsCaps or sleeves for fixing on cables or ropes
F16M 13/02 - Other supports for positioning apparatus or articlesMeans for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas
17.
CONTROL SYSTEM FOR STEERABLE TOWED MARINE EQUIPMENT
A control system provides steering control commands to a steering actuator of a steering device on a piece of towed marine equipment. A memory in the control system stores setpoint data including positional values for a desired position of the piece of towed marine equipment. A control module is configured to receive the setpoint data, receive process data representing a calculated actual position of the piece of towed marine equipment; and calculate a control command for the steering actuator of the steering device based upon the setpoint data and the process data. A disturbance adjustment calculation module is configured to combine a disturbance value based upon a measured disturbance with a value of the process data and output a disturbance adjustment value. A correction calculator module adds the disturbance adjustment value to the control command to create an adjusted control command for transmission to the steering actuator.
An attachment system for releasably attaching a sensor node to a cable when in a coupled state includes a clamp base and a clamp grip. The clamp base is fixed to a surface of the sensor node. The clamp base further includes a latch that is biased in a latched position when the attachment system is in both the coupled state and an uncoupled state. The clamp grip is pivotably attached the clamp base and biased in an open position when the attachment system is in the uncoupled state. The clamp grip is secured to the clamp base by the latch when the attachment system is in the coupled state.
G01V 1/20 - Arrangements of receiving elements, e.g. geophone pattern
G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas
B65H 75/42 - Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material mobile or transportable attached to, or forming part of, mobile tools or machines
Embodiments herein include a fairing for a marine seismic array system that includes a foil having a leading edge and a trailing edge and defining a chord length and a span length, a first interior conduit oriented along the span length aft of the leading edge, and a second interior conduit oriented along the span length forward of the trailing edge. The conduits are separated by a distance. A first cable having a first length extends within the first conduit and a second cable having a second length extends within the second conduit, and the fairing can rotate about the first cable within the first conduit.
A seismic apparatus includes one or more seismic cable systems configured to acquire seismic data, each seismic cable system having one or more of a cable jacket, a reservoir for a ballast fluid or other ballast medium, and an actuator or other transfer mechanism configured to transfer the ballast fluid between the reservoir and the seismic cable system during acquisition of the seismic data, e.g., where the ballast fluid is transferred to the seismic cable system within the cable jacket. A controller can be configured to adjust a buoyancy of the seismic cable system responsive to the transfer of the ballast fluid, e.g., where the internal volume expands or contract based on the fluid transfer.
An attachment system for securing an object, such as a seismic node or other external device, to a rope or cable includes a latch block and a latch member movably connected to the latch block for selective engagement with a coupling feature on the rope or cable. The latch block may be attached to or integrated with the object and can include opposing side members defining a channel extending through the latch block, the channel sized for selective receipt of the rope or cable therein. The latch member may selectively engage the coupling feature as the rope or cable is received in sliding engagement within the channel.
F16M 11/14 - Means for attachment of apparatusMeans allowing adjustment of the apparatus relatively to the stand allowing pivoting in more than one direction with ball-joint
F16M 13/02 - Other supports for positioning apparatus or articlesMeans for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
F16G 11/00 - Means for fastening cables or ropes to one another or to other objectsCaps or sleeves for fixing on cables or ropes
G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas
F16G 11/02 - Means for fastening cables or ropes to one another or to other objectsCaps or sleeves for fixing on cables or ropes with parts deformable to grip the cable or cablesFastening means which engage a sleeve or the like fixed on the cable
F16G 11/06 - Means for fastening cables or ropes to one another or to other objectsCaps or sleeves for fixing on cables or ropes with laterally-arranged screws
A marine seismic sensor system includes a seismic node having at least one seismic sensor. The sensor is configured for sampling seismic energy when towed through a water column on a rope. The coupling can be adapted to modulate transmission of acceleration from the rope to the seismic node.
A seismic node deployment system comprises a cable supply with one or more seismic nodes configured for coupling to the cable at one or more attachment locations for deployment to a water column. A node attachment system is configured to drive a portion of the cable into periodic or reciprocal motion so that the attachment speed is substantially reduced relative to the speed at which the cable is deployed.
A seismic node deployment system comprises a cable supply with one or more seismic nodes configured for coupling to the cable at one or more attachment locations for deployment to a water column. A node attachment system is configured to drive a portion of the cable into periodic or reciprocal motion so that the attachment speed is substantially reduced relative to the speed at which the cable is deployed.
An unmanned seismic vessel system can include a hull system configured to provide buoyancy and a storage apparatus configured for storing one or more seismic nodes, each seismic node having at least one seismic sensor configured to acquire seismic data. A deployment system can be configured for deploying the seismic nodes from the storage apparatus to the water column, where the seismic data are responsive to a seismic wavefield, with a controller configured to operate the deployment system so that the seismic nodes are automatically deployed in a seismic array.
Foil systems for steering source and receiver arrangements for gathering seismic data are connected to buoys supporting seismic sources and receivers. Each foil system includes a positive buoyancy device, a pair of control cables, a plurality of foil sections, and an actuator. The pair of control cables may be attached to the buoyancy device and extend downward from the buoyancy device to a submerged end. The plurality of foil sections may be disposed along the control cables between the buoyancy device and the submerged end. The actuator may be configured to adjust attack angles of the foil sections by changing a tension in one or both of the control cables. Steering control is provided through a number of modes described by data distributed through a control system in communication with the foil systems.
Foil systems for steering source and receiver arrangements for gathering seismic data are connected to buoys supporting seismic sources and receivers. Each foil system includes a positive buoyancy device (18), a pair of control cables, a plurality of foil sections (30), and an actuator (52). The pair of control cables may be attached to the buoyancy device and extend downward from the buoyancy device to a submerged end. The plurality of foil sections may be disposed along the control cables between the buoyancy device (18) and the submerged end. The actuator may be configured to adjust attack angles of the foil sections by changing a tension in one or both of the control cables. Steering control is provided through a number of modes described by data distributed through a control system in communication with the foil systems.
A ranging system comprises a plurality of streamers, each with a plurality of receivers. A plurality of transmitters is also disposed along one or more of the streamers, each configured to generate acoustic or ranging signals over one or more channels. A processor is configured to define a subset of the transmitters within a predefined limited range or listening distance of each receiver. In the subset, the transmitters are configured to generate the acoustic signals over different channels.
A marine seismic sensor system includes a seismic node having at least one seismic sensor. The sensor is configured for sampling seismic energy when towed through a water column on a rope. The coupling can be adapted to modulate transmission of acceleration from the rope to the seismic node.
Systems and methods are provided for operating streamer recovery devices to retrieve seismic streamers, for example streamers that become severed from their towing vessels. The streamer recovery can be remotely activated to cause the streamer to surface where the streamer is more easily retrieved.
An seismic sensor device may include a sensor module and a connected vessel. The sensor module may include a seismic sensor for collecting seismic data. The vessel may include a first region for engaging the sensor module. The vessel may also include a second region for coupling the seismic sensor device to a location for collecting seismic data.
A segmented-foil divertor for marine towed application, such as marine seismic exploration, having a plurality of longitudinally stackable foil segments with an internal conduit extending along the span of each segment to receive a cable passing therethrough.
Methods, systems, and apparatuses are disclosed for sensing acoustic waves in a medium. One example system includes a first elongated member, a first motion sensor sensitive to vibrations of the first elongated member, a second motion sensor spaced apart from the first motion sensor and also sensitive to vibrations of the first elongated member, and a first vibration source operably coupled to the first elongated member and configured to vibrate the first elongated member.
G01V 1/36 - Effecting static or dynamic corrections on records, e.g. correcting spreadCorrelating seismic signalsEliminating effects of unwanted energy
G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas
G01V 1/20 - Arrangements of receiving elements, e.g. geophone pattern
A seismic data collection system is disclosed. The system may include at least a first housing and a second housing. The first housing may be configured to detachably couple to the second housing. The system mays also include various components such as one or more seismic sensors, a clock, or memory. Each of the components may be arranged in one of the first housing or second housing.
Embodiments of the invention provide methods, systems, and apparatus for conserving power while conducting an ocean bottom seismic survey. Sensor nodes placed on an ocean floor may be configured to operate in at least an idle mode and an active mode. Each node may adjust its mode of operation from idle mode to active mode.
A seismic sensor cable system is provided. The seismic sensor cable system may include a cable, a first sensor configured to measure motion of the cable, wherein measurement of motion by the first sensor substantially excludes particle motion associated with seismic waves, and a second sensor configured to measure particle motion associated with the seismic waves.
A seismic sensor cable system is provided. The seismic sensor cable system may include a cable, a first sensor configured to measure motion of the cable, wherein measurement of motion by the first sensor substantially excludes particle motion associated with seismic waves, and a second sensor configured to measure particle motion associated with the seismic waves.
An underwater seismic system for reducing noise due to ghost reflections or motion through the water from seismic signals. The system includes two motion sensors. One sensor has a first response and is sensitive to platform-motion-induced noise as well as to acoustic waves. The other sensor has a different construction that isolates it from the acoustic waves so that its response is mainly to motion noise. The outputs of the two sensor responses are combined to remove the effects of motion noise. When further combined with a hydrophone signal, noise due to ghost reflections is reduced.
G01V 1/18 - Receiving elements, e.g. seismometer, geophone
G01V 1/36 - Effecting static or dynamic corrections on records, e.g. correcting spreadCorrelating seismic signalsEliminating effects of unwanted energy
G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas
39.
POWER SAVINGS MODE FOR OCEAN BOTTOM SEISMIC DATA ACQUISITION SYSTEMS
Embodiments of the invention provide methods, systems, and apparatus for conserving power while conducting an ocean bottom seismic survey. Sensor nodes placed on an ocean floor may be configured to operate in at least an idle mode and an active mode. When a seismic source boat approached the sensor node, the node may adjust its mode of operation from an idle mode to an active mode. After the seismic source boat is no longer near the sensor node, the idle mode may be entered again to conserve power.
Methods, systems, and apparatuses are disclosed for sensing acoustic waves in a medium. One example system includes a first elongated member, a first motion sensor sensitive to vibrations of the first elongated member, a second motion sensor spaced apart from the first motion sensor and also sensitive to vibrations of the first elongated member, and a first vibration source operably coupled to the first elongated member and configured to vibrate the first elongated member.
Embodiments of the invention provide methods, systems, and apparatus for conserving power while conducting an ocean bottom seismic survey. Sensor nodes placed on an ocean floor may be configured to operate in at least an idle mode and an active mode. When a seismic source boat approached the sensor node, the node may adjust its mode of operation from an idle mode to an active mode. After the seismic source boat is no longer near the sensor node, the idle mode may be entered again to conserve power.
A foil having a leading edge, trailing edge, chord and span is attached between a first head float position and bottom submerged position below the head float on the array. The foil being flexible along its span and has a first interior conduit rearward of the leading edge and a second interior conduit forward of the trailing edge. The conduits are centered on the chord and separated by a distance. A first cable having a first length is strung inside the first conduit and a second cable having a second length is strung inside the second conduit, and an adjustment mechanism is used to vary the length of the first cable relative to the length of the second cable and vice versa.
Methods, apparatuses, and systems are disclosed for a transducer. The transducer can include a bottom plate formed from a first sheet of material, a top plate formed from a second sheet of material, and a middle portion. The middle portion includes a mid-upper element formed from a third sheet of material, with a mid-upper frame, a mid-upper mass, and a plurality of mid-upper attachment members coupling the mid-upper mass to the mid-upper frame. The middle portion can also include a central element formed from a fourth sheet of material, with the central element having a central frame and a central mass.
G01P 15/125 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values by capacitive pick-up
H02N 1/00 - Electrostatic generators or motors using a solid moving electrostatic charge carrier
G01H 11/08 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
G01P 15/09 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values by piezoelectric pick-up
G01P 15/12 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values by alteration of electrical resistance
G01P 15/18 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration in two or more dimensions
G01V 1/18 - Receiving elements, e.g. seismometer, geophone
G01V 13/00 - Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups
G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas
G01P 15/08 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values
44.
Method and apparatus for sensing underwater signals
Methods and apparatuses are disclosed that assist in sensing underwater signals in connection with geophysical surveys. One embodiment relates to a transducer including a cantilever coupled to a base. The cantilever may include a beam and a first coupling surface angularly oriented from the beam, and the base may include a second coupling surface angularly oriented from the beam and substantially parallel to the first coupling surface of the cantilever. The transducer may further include a sensing material coupled between the first coupling surface of the cantilever and the second coupling surface of the base.
G01P 15/12 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values by alteration of electrical resistance
H02N 1/00 - Electrostatic generators or motors using a solid moving electrostatic charge carrier
G01H 11/08 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
G01P 15/09 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values by piezoelectric pick-up
G01P 15/18 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration in two or more dimensions
G01V 1/18 - Receiving elements, e.g. seismometer, geophone
G01V 13/00 - Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups
G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas
G01P 15/08 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values
45.
METHOD AND APPARATUS FOR SENSING UNDERWATER SIGNALS
Methods and apparatuses are disclosed that assist in sensing underwater signals in connection with geophysical surveys. One embodiment relates to a transducer including a cantilever coupled to a base. The cantilever may include a beam and a first coupling surface angularly oriented from the beam, and the base may include a second coupling surface angularly oriented from the beam and substantially parallel to the first coupling surface of the cantilever. The transducer may further include a sensing material coupled between the first coupling surface of the cantilever and the second coupling surface of the base.
G01P 15/09 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values by piezoelectric pick-up
G01P 15/12 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values by alteration of electrical resistance
G01P 15/18 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration in two or more dimensions
A multi-component sensor of a fluid-borne acoustic wave that senses pressure and up to three orthogonal particle motion components. The sensor is unresponsive to motion of the sensor mount. Furthermore, the sensor is substantially unresponsive to the turbulent flow of the acoustic medium past the sensor.
A seismic streamer system and associated methods for estimating the shape of a laterally steered seismic streamer. The streamer is divided into a series of contiguous streamer segments by lateral-steering devices. Heading sensors positioned in forward and aft portions of each segment produce heading readings. Each segment is modeled as having a linear shape in the forward portion and a curved shape in the aft portion. The shape of the segment is estimated according to the model from the heading readings on the segment.
A seismic streamer system and associated methods for estimating the shape of a laterally steered seismic streamer. The streamer is divided into a series of contiguous streamer segments by lateral-steering devices. Heading sensors positioned in forward and aft portions of each segment produce heading readings. Each segment is modeled as having a linear shape in the forward portion and a curved shape in the aft portion. The shape of the segment is estimated according to the model from the heading readings on the segment.
An underwater seismic system for reducing noise due to ghost reflections or motion through the water from seismic signals. The system includes two motion sensors. One sensor has a first response and is sensitive to platform-motion-induced noise as well as to acoustic waves. The other sensor has a different construction that isolates it from the acoustic waves so that its response is mainly to motion noise. The outputs of the two sensor responses are combined to remove the effects of motion noise. When further combined with a hydrophone signal, noise due to ghost reflections is reduced.
An underwater seismic system for reducing noise due to ghost reflections or motion through the water from seismic signals. The system includes two motion sensors. One sensor has a first response and is sensitive to platform-motion-induced noise as well as to acoustic waves. The other sensor has a different construction that isolates it from the acoustic waves so that its response is mainly to motion noise. The outputs of the two sensor responses are combined to remove the effects of motion noise. When further combined with a hydrophone signal, noise due to ghost reflections is reduced.
An underwater ocean bottom cable constructed of a series of axially aligned cable segments alternately arranged with sensor units. The sensor units include an outer housing with an interior cavity in which a sensor module is suspended by a cradle. Vanes on the sensor module protrude through axially elongated openings in the outer housing to dig into the seabed to provide good seismic coupling between the seabed and pressure sensors and motion sensors housed in the sensor module. The outer sensor housing is split into complementary portions that clamp firmly onto the ends of adjacent cable segments. Stress members, such as high modulus fiber ropes, extend out the ends of adjacent cable segments. Axial channels formed in the intervening outer sensor housing on opposite sides of the sensor module receive the stress members, which, along with the cradle, provide seismic isolation between the cable segments and the sensor modules.
A two-tier communication system for a seismic streamer. The communication system operates over an unshielded twisted-pair communication line extending the length of the streamer. Repeater units having a repeater function and a device controller function divide the twisted pair into line segments. Coils on each segment couple signals inductively to collocated external devices in a low-speed 2400 baud FSK data link between the devices and an associated device controller. A Gaussian 8-level FSK high-speed 60 kbit/s data link is established along all the segments with the repeaters re-transmitting boosted signals along the entire length of the communication line. The coils are transparent at the high-speed data rate. Time division multiple access (TDMA) or frequency division multiple access (FDMA) is used to accommodate the two links on the single twisted pair.
A method and system for controlling the shape and separation of an arrangement of streamers towed behind a survey vessel (10). Each streamer is steered laterally by lateral steering devices (16) positioned along its length at specific nodes. Each streamer is driven by its lateral steering devices to achieve a specified separation from a neighboring streamer. One of these actual streamers, used as a reference by the other actual streamers, is steered to achieve a specified separation from an imaginary, or ghost, streamer virtually towed with the actual streamers.
A method and system for controlling the shape and separation of an arrangement of streamers towed behind a survey vessel. Each streamer is steered laterally by lateral steering devices positioned along its length at specific nodes. Each streamer is driven by its lateral steering devices to achieve a specified separation from a neighboring streamer. One of these actual streamers, used as a reference by the other actual streamers, is steered to achieve a specified separation from an imaginary, or ghost, streamer virtually towed with the actual streamers.
G01S 1/38 - Systems for determining direction or position line using comparison of [1] the phase of the envelope of the change of frequency, due to Doppler effect, of the signal transmitted by an antenna moving, or appearing to move, in a cyclic path with [2] the phase of a reference signal, the frequency of this reference signal being synchronised with that of the cyclic movement, or apparent cyclic movement, of the antenna
55.
SEISMIC STREAMER WITH IRREGULARLY SPACED HYDROPHONES
A seismic streamer and a method for positioning a group of hydrophones in a seismic streamer. The hydrophones in a group are spaced irregularly along the length of the streamer to reduce the influence of bulge-wave noise and flow noise on the hydrophone group response. The irregular spacing may be produced as pseudorandom deviations of the actual positions of the hydrophones from a nominal uniform spacing of hydrophones.
A position controller capable of controlling the depth or lateral position of a towed array. The position controller comprises a tubular fuselage from which a pair of wings may be extended over a range of sweep angles between fully open and stowed positions. In fully or partly open positions, two wings present a positive angle of attack relative to the axis of the fuselage. In the stowed position, the wings are fully retracted into a wing receptacle within the fuselage for unfettered passage into and out of a submarine on the array deployment and retrieval handling system. The sweep angles of the two wings are independently adjustable by first and second actuators.
A motion sensing transducer is disclosed that includes a case having an inner surface, a first cap that closes the case at a first end and a second cap that closes the case at a second end. The case inner surface, first cap and second cap define a space within the case. The apparatus further includes at least one inner plate member separating the space into at a first compartment and a second compartment within the case, a coil-magnet assembly that produces a signal when subjected to motion, the coil-magnet assembly disposed immediately within the case and in the first compartment, and an electronic circuit disposed within the second compartment that modifies the signal.
G01D 5/12 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means
G01P 13/00 - Indicating or recording presence or absence of movementIndicating or recording of direction of movement
G01V 1/18 - Receiving elements, e.g. seismometer, geophone
58.
DEVICE AND METHOD FOR LATERALLY STEERING STREAMER CABLES
A device and a method for laterally steering a streamer cable towed underwater behind a seismic survey vessel. The device includes a cable-steering assembly rotatably attached to a streamer cable. The assembly includes a body to which one or more wings are mounted. The wings are arranged to pivot about pivot axes. The assembly is ballasted so that the pivot axes of the wings are largely in a vertical plane. A conventional cable-leveling bird is converted to one version of a cable-steering device by ballasting to maintain the pivot axes of the bird's wings largely vertical. With an orientation sensor for sensing the orientation of tile wings, the cable-steering device adjusts the angle of the wings to provide a sideward component of force to steer the streamer.
09 - Scientific and electric apparatus and instruments
Goods & Services
(1) Electronic survey and position detection systems and components therefor, namely, compasses, depth sensors, electronic heading sensors and electronic seismic instrumentation; streamer cable position control devices, depth sensors, depth control devices using electronic sensors for use in towing underwater cables; connectors for attaching depth control devices using electronic sensors for use in towing underwater cables to underwater cables; underwater acoustic ranging devices, namely, sonic transmitters and receivers and signal processors, attached to towed underwater cables, towed seismic gun mounts, ship hulls, or seabottom- lying underwater cables; shipboard support digital signal processing equipment for computing heading and underwater ranges and controlling depth; velocimeters; buoys with transmitters, receivers, underwater sonic transducers and transponders; radio communication equipment, namely, receivers, transmitters, electrical communication coils; computer software for use in marine seismic surveying and position measuring
09 - Scientific and electric apparatus and instruments
Goods & Services
electronic seismic instrumentation, namely compasses, depth sensors, acoustic positioners; streamer cable position control devices, depth control devices; acoustic ranging systems, namely shipboard support digital signal processing equipment for sensing heading and controlling depth; streamer assemblies for towing by boat; heading sensors; roll sensors; acoustic release mechanisms; transmitters, receivers and transponders and buoys; computer program software for use in seismic surveying; and communication equipment, namely receivers and transmitters
