A logging or measuring while drilling tool includes a semi-tubular housing base having first and second portions. A first semi-tubular lid is releasably connected to the first portion. The first semi-tubular lid and first portion of the semi-tubular housing base provides a first enclosure for containing a sensor. The sensor may be cylindrically shaped with an outer cylindrical surface that extends laterally between the first and second flat end surfaces. The outer cylindrical surface of the sensor may engage the first semi-tubular lid.
An apparatus includes a sensor to generate a light signal in response to receiving gamma radiation, and a photo multiplier tube (PMT) that receives the light signal and generates a corresponding PMT signal. A voltage source provides a supply voltage to the PMT. The magnitude of the PMT signal depends on a magnitude of the supply voltage. A temperature sensor generates a temperature signal with a magnitude that varies with a temperature sensed by the temperature sensor. The temperature sensed by the temperature sensor is substantially equal to a temperature of the PMT. A signal conditioner modifies the temperature signal. A control circuit coupled between the voltage source and the signal conditioner receives the modified temperature signal and generates a control signal for adjusting the magnitude of supply voltage based on the modified temperature signal.
G01V 5/06 - Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging for detecting naturally radioactive minerals
09 - Scientific and electric apparatus and instruments
Goods & Services
Measuring tools and sensors for the oil and gas industries, namely, measuring tools and sensors for the measurement, monitoring, and detection of gamma radiation; measurement while drilling tools and sensors, namely, measurement while drilling tools and sensors for the measurement, monitoring, and detection of gamma radiation; logging while drilling tools namely, logging while drilling tools for the measurement, monitoring, and detection of gamma radiation.
09 - Scientific and electric apparatus and instruments
Goods & Services
Measuring tools and sensors for the oil and gas industries, namely, measuring tools and sensors for the measurement, monitoring, and detection of gamma radiation; measurement while drilling tools and sensors, namely, measurement while drilling tools and sensors for the measurement, monitoring, and detection of gamma radiation; logging while drilling tools namely, logging while drilling tools for the measurement, monitoring, and detection of gamma radiation.
5.
ENVIRONMENTAL MONITORING OF LOGGING-WHILE-DRILLING TOOL COMPONENTS
A method and system for environmental monitoring of logging-while-drilling (LWD) components. In one embodiment the system includes a formation sensor configured to generate a signal related to a property of a surrounding rock formation, and a first environmental sensor fastened to the formation sensor and configured to generate a signal related to a first environmental condition experienced by the first environmental sensor. The formation sensor and first environmental sensor may be contained in a package of an LWD tool.
A method and system for environmental monitoring of logging-while-drilling (LWD) components. In one embodiment the system includes a formation sensor configured to generate a signal related to a property of a surrounding rock formation, and a first environmental sensor fastened to the formation sensor and configured to generate a signal related to a first environmental condition experienced by the first environmental sensor. The formation sensor and first environmental sensor may be contained in a package of an LWD tool.
G01V 5/00 - Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
G01V 5/04 - Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
E21B 47/01 - Devices for supporting measuring instruments on drill bits, pipes, rods or wirelinesProtecting measuring instruments in boreholes against heat, shock, pressure or the like
A logging while drilling (LWD) tool can include a shock mounted sensor package with thermal isolation. For example, a LWD tool can include a pressure housing surrounding a cavity. A sensor package that includes at least one end connection can be coupled within the cavity. The LWD tool can also include a support structure coupled to the pressure housing and supporting the end connection of the sensor package. The support structure is configured to provide damping along at least one of the axial, radial, and azimuthal axes. The end connection is configured to inhibit thermal conductivity between the support structure and the sensor package.
G01V 3/18 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging
8.
Shock mounted sensor package with thermal isolation
A logging while drilling (LWD) tool can include a shock mounted sensor package with thermal isolation. For example, a LWD tool can include a pressure housing surrounding a cavity. A sensor package that includes at least one end connection can be coupled within the cavity. The LWD tool can also include a support structure coupled to the pressure housing and supporting the end connection of the sensor package. The support structure is configured to provide damping along at least one of the axial, radial, and azimuthal axes. The end connection is configured to inhibit thermal conductivity between the support structure and the sensor package.
G01V 5/04 - Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
E21B 47/01 - Devices for supporting measuring instruments on drill bits, pipes, rods or wirelinesProtecting measuring instruments in boreholes against heat, shock, pressure or the like
A rugged scintillation crystal assembly includes several scintillator crystals, which are optically coupled to each other by resilient optical-coupling material such as silicone pads and/or grease. The scintillator crystals are configured to collectively emit optical signals. Such a stack may combine the advantages of both a long form-factor for the overall assembly with the ruggedness of the assembly's component short crystals.
A rugged scintillation crystal assembly includes several scintillator crystals, which are optically coupled to each other by resilient optical-coupling material such as silicone pads and/or grease. The scintillator crystals are configured to collectively emit optical signals. Such a stack may combine the advantages of both a long form-factor for the overall assembly with the ruggedness of the assembly's component short crystals.
A wet-connect can include a radial array of contacts that are electrically isolated from each other. The wet-connect can include a male connector and a female connector. The contacts are placed at spaced distances from each other around the outside diameter of the male connector and the inside diameter of the female connector. Because the contacts are spaced around the radius of the connectors, the length of the wet-connect does not have to depend upon the number of contacts provided by the wet-connect. This in turn can reduce the length of the wet-connect, making the wet-connect less susceptible to breakage or misalignment and/or allowing the wet-connect to be manufactured using less material.
Various systems and methods for implementing a directional radiation detection tool are disclosed. One such method involves receiving outputs from several radiation sensors (e.g., gamma ray sensors), which are each facing a different direction. The received outputs are then combined, such that a directional error in one of the outputs is reduced, based upon another one of the outputs.
G01T 1/202 - Measuring radiation intensity with scintillation detectors the detector being a crystal
G01V 5/04 - Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
G01V 5/12 - Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using gamma- or X-ray sources
Various systems and methods for implementing a directional radiation detection tool are disclosed. One such method involves receiving outputs from several radiation sensors (e.g., gamma ray sensors), which are each facing a different direction. The received outputs are then combined, such that a directional error in one of the outputs is reduced, based upon another one of the outputs.
G01V 5/04 - Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
G01V 5/06 - Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging for detecting naturally radioactive minerals
Various systems and methods for implementing a directional radiation detection tool are disclosed. One such method involves receiving outputs from several radiation sensors (e.g., gamma ray sensors), which are each facing a different direction. The received outputs are then combined, such that a directional error in one of the outputs is reduced, based upon another one of the outputs.
Various systems and methods for implementing an azimuthally sensitive resistivity logging tool are disclosed. One such method involves transmitting a primary magnetic field from one or more coils placed on a drill collar and receiving several electrical signals, where each of the electrical signals is received from a respective one of several sensors. The sensors are distributed around a circumference of a drill collar, and an axis of at least one of the sensors is perpendicular to an axis of the drill collar. Each of the electrical signals indicates a respective magnitude of a measurement of a reflected magnetic field, where the reflected magnetic field is reflected from an anomalous geological formation. The method calculates a vector measurement of the reflected magnetic field, based upon the electrical signals.
G01V 3/28 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device using induction coils
Various systems and methods determine a distance, magnitude, and azimuthal angle describing the location of an anomaly within a geologic formation. For example, a method involves identifying an electrical characteristic (e.g., resistivity or conductivity) at each of several sensors in a measurement- while-drilling (MWD) tool. Based on the electrical characteristic, information identifying a formation property of the anomaly is generated. The information includes at least one magnitude and at least one distance. Information information identifying an azimuthal angle is also generated based upon the electrical characteristic. The azimuthal angle relates a position of the anomalous formation to a position of a first sensor in the MWD tool.
Various systems and methods determine a distance, magnitude, and azimuthal angle describing the location of an anomaly within a geologic formation. For example, a method involves identifying an electrical characteristic (e.g., resistivity or conductivity) at each of several sensors in a measurement-while-drilling (MWD) tool. Based on the electrical characteristic, information identifying a formation property of the anomaly is generated. The information includes at least one magnitude and at least one distance. Information information identifying an azimuthal angle is also generated based upon the electrical characteristic. The azimuthal angle relates a position of the anomalous formation to a position of a first sensor in the MWD tool.
