Embodiments herein generally relate to methods and systems for downhole sensing. In at least one example, the system for downhole wireless sensing comprises: a power supply electrically connected to a conductive portion of a well, and configured to provide input electric current through the conductive portion; a wireless sensor unit electrically connected to the conductive portion to receive the input electric current, the wireless sensor unit connecting to an output ground node and configured to transmit an output sensor signal through the output ground node; a ground signal receiver for detecting an electromagnetic signal, travelling through ground, corresponding to the output sensor signal; and at least one processor coupled to the ground signal receiver for receiving the detected output sensor signal.
E21B 47/13 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. of radio frequency range
G01D 5/08 - Reducing the effects of friction, e.g. by applying vibrations
Disclosed are methods and systems for relieving strain of an optical fiber installed in a conduit downhole, wherein the conduit is purged with a purge gas to relieve mechanical strain of the fiber.
Disclosed are methods and systems for relieving strain of an optical fiber installed in a conduit downhole, wherein the conduit is purged with a purge gas to relieve mechanical strain of the fiber.
A system and method for calibrating a distributed temperature sensing (DTS) system having a fiber optic receiver coupled to an optical fiber, includes fiber Bragg gratings (FBGs) integrally formed within the optical fiber, and a processor configured to compute a temperature datum for a location of each FBG based on signals generated by the fiber optic receiver in response to light reflections from the FBG; and adjusting a computed temperature data profile along the optical fiber segment, based on the computed temperature datum for each location of an FBG.
G01K 11/3206 - Measuring temperature based on physical or chemical changes not covered by group , , , or using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
5.
DISTRIBUTED TEMPERATURE SENSING SYSTEM WITH FIBER BRAGG GRATINGS
A system and method for calibrating a distributed temperature sensing (DTS) system having a fiber optic receiver coupled to an optical fiber, includes fiber Bragg gratings (FBGs) integrally formed within the optical fiber, and a processor configured to compute a temperature datum for a location of each FBG based on signals generated by the fiber optic receiver in response to light reflections from the FBG; and adjusting a computed temperature data profile along the optical fiber segment, based on the computed temperature datum for each location of an FBG.
E21B 47/135 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. of radio frequency range using light waves, e.g. infrared or ultraviolet waves
G01K 11/3206 - Measuring temperature based on physical or chemical changes not covered by group , , , or using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
G01K 15/00 - Testing or calibrating of thermometers
G02B 6/34 - Optical coupling means utilising prism or grating
A vibrating wire piezometer pressure sensor system has (a) a vibrating wire connected to a pressure diaphragm; (b) a first electromagnetic coil (EMC) associated with the vibrating wire; (c) a second EMC associated with the vibrating wire; wherein the first EMC and the second EMC are wired in series and in parallel to a signal processor for converting an electrical signal to a pressure measurement.
G01L 9/00 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elementsTransmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
A vibrating wire piezometer pressure sensor system has (a) a vibrating wire connected to a pressure diaphragm; (b)a first electromagnetic coil (EMC) associated with the vibrating wire; (c) a second EMC associated with the vibrating wire; wherein the first EMC and the second EMC are wired in series and in parallel to a signal processor for converting an electrical signal to a pressure measurement.
G01L 9/00 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elementsTransmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
ABSTRACTA thermistor cable is fomied from a tubing and a plurality of thermistor conductors bundled within the tubing, wherein each thennistor conductor forms a junction with a shared thermistor conductor to form a thennistor junction, and each thermistor junction is attached to a support cable in a thermistor bundle. The cable is formed by pulling the thermistor bundleinto the tubing.17Date Recue/Date Received 2020-12-02
H10N 10/17 - Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the structure or configuration of the cell or thermocouple forming the device
09 - Scientific and electric apparatus and instruments
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Downhole instrumentation used for reservoir monitoring in oil and gas, namely software and sensors used to monitor, measure, record and transmit temperature, pressure, flow and strain data. (1) Installation of automated electric flow control valves used for oil and gas wells; Field service work in the oil and gas industry, namely, repair and maintenance of oil and gas drilling equipment.
(2) Remote monitoring of automated electric flow control valves used for oil and gas wells; Engineering consulting services in the filed of oil and gas; Engineering project management in the field of oil and gas; Engineering services for oil and gas analysis and surveying.
09 - Scientific and electric apparatus and instruments
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Oil and gas downhole instrumentation used for reservoir monitoring Field service work in the oil and gas industry, namely, repair and maintenance of oil and gas drilling equipment Engineering services in the oil and gas industry
09 - Scientific and electric apparatus and instruments
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Downhole instrumentation used for reservoir monitoring in oil and gas, namely software and sensors used to monitor, measure, record and transmit temperature, pressure, flow and strain data. (1) Installation of automated electric flow control valves used for oil and gas wells; Field service work in the oil and gas industry, namely, repair and maintenance of oil and gas drilling equipment.
(2) Remote monitoring of automated electric flow control valves used for oil and gas wells; Engineering consulting services in the filed of oil and gas; Engineering project management in the field of oil and gas; Engineering services for oil and gas analysis and surveying.
A themiocouple cable is formed from a tubing and a plurality of thermocouple conductors bundled within the tubing, wherein each thermocouple conductor forms a junction with a shared thermocouple conductor to form a thermocouple junction, and each themiocouple junction is attached to a support cable in a themiocouple bundle. The cable is fomied by pulling the thermocouple bundle into the tubing.
G01K 7/02 - Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat using thermoelectric elements, e.g. thermocouples
A thermocouple cable is formed from a tubing and a plurality of thermocouple conductors bundled within the tubing, wherein each thermocouple conductor forms a junction with a shared thermocouple conductor to form a thermocouple junction, and each thermocouple junction is attached to a support cable in a thermocouple bundle. The cable is formed by pulling the thermocouple bundle into the tubing.
G01K 7/02 - Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat using thermoelectric elements, e.g. thermocouples
H01B 7/00 - Insulated conductors or cables characterised by their form
H01B 13/22 - SheathingArmouringScreeningApplying other protective layers
H01B 13/32 - Filling or coating with impervious material
A method of conveying a fiber optic cable through a conduit having an inside diameter involves connecting an interior pig assembly to a far end of the fiber optic cable, the interior pig assembly having an outside diameter smaller than the conduit inside diameter, and inserting the interior pig assembly into the conduit. To convey the fiber optic cable through the conduit, the interior pig assembly may be ferromagnetic, and an exterior assembly including a magnet outside the conduit may be used to pull the interior pig assembly pig through the conduit. In addition or alternatively, a gas may be injected into the conduit to push the pig assembly through the conduit.
