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公开(公告)号：US20220035066A1
公开(公告)日：2022-02-03
申请号：US16940479
申请日：2020-07-28
发明人： Ping Zhang , Shouxiang Ma , Wael Abdallah , Chengbing Liu
摘要： Methods and systems are provided for characterizing formation water salinity of subsurface formation using multifrequency permittivity data over a range of frequencies below 1 MHz. The multifrequency permittivity data is processed to determine salinity of formation water contained in the subsurface formation. Other useful formation properties (such as formation water saturation) can be determined based on the formation water salinity.
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公开(公告)号：US11174725B2
公开(公告)日：2021-11-16
申请号：US15533961
申请日：2016-08-12
摘要： A calibration system for an electromagnetic (EM) tool includes a processor. The processor employs the EM tool to measure responses at each of a plurality of channels. The processor records the measured responses at each of the channels in an EM data log for the channel. The processor selects one or more calibration points from the EM data log for a particular channel, based on a difference between the nominal value of the particular channel and the measured response at the calibration point being greater than a particular threshold.
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23.发明授权公开(公告)号：US11169298B2
公开(公告)日：2021-11-09
申请号：US15579358
申请日：2016-07-20
发明人： Thomas Louis Yonley
摘要： A system for reduced noise during remote field testing (RFT). The system, while moving an RFT probe through a structure: generates, RFT probe, a magnetic field. The system detects, at a detector solenoid on the RFT probe, a measured magnetic field which is the magnetic field modified by the presence of nearby pipe, and wherein the detector solenoid has a non-uniform solenoid response (i.e. a non-uniform turn density and/or cross sectional winding area) along a longitudinal axis extending from a one end of the detector solenoid to the opposite end of the detector solenoid. The system then identifies and measures pipe properties from an analysis of the measured magnetic field, via signal processing in conjunction with modeling.
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公开(公告)号：US20210324733A1
公开(公告)日：2021-10-21
申请号：US17318840
申请日：2021-05-12
申请人： Hunting Titan, Inc.
发明人： Gene McBride
IPC分类号： E21B47/092 , E21B43/119 , E21B43/114 , E21B47/0228 , E21B43/117 , E21B47/024 , G01V3/28
摘要： A method, system, and apparatus for determining the location of a tool traveling down a wellbore by measuring a first borehole magnetic anomaly with respect to time at two known locations on a tool, comparing the time difference between the two measurements, then calculating the velocity of the tool based on the comparison and then further calculating the distance traveled by the tool in the wellbore based on the velocity calculation.
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25.发明授权公开(公告)号：US11149538B2
公开(公告)日：2021-10-19
申请号：US16288794
申请日：2019-02-28
申请人： Kersten Kraft , Andreas Hartmann , Eugen Medvedev
发明人： Kersten Kraft , Andreas Hartmann , Eugen Medvedev
IPC分类号： G01V3/34 , G01V3/28 , E21B47/024 , E21B47/14 , E21B7/04
摘要： A system for determining bending of a drilling tool includes at least one element attached to the drilling tool and the at least one element includes a magnetic material, and at least one electrical conduit in the drilling tool and electro-magnetically coupled to the at least one element. The system also includes at least one signal source that feeds a signal into the electrical conduit and a measurement system that: measures at least one property of the signal in the electrical conduit as the signal source feeds the signal; and determines the bending of the drilling tool based on the measured property of the signal.
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公开(公告)号：US11131787B2
公开(公告)日：2021-09-28
申请号：US16352366
申请日：2019-03-13
发明人： Seung Jae Lee , Soo Yong Kim , Sun Joo Hong
摘要： An electromagnetic (EM) sensor includes a front end module generating an EM signal using electromagnetic waves transmitted from an external source, a sensor memory storing a portion of a plurality of machine learning models used to recognize the EM signal, and a microcontroller unit for recognizing the external electronic device emitting the electromagnetic waves by inputting feature values extracted from the EM signal to the machine learning models. If the machine learning models stored in the sensor memory are not able to recognize the external device, the feature values may be transmitted to a main processor, and the main processor may compare the feature values to another set of machine learning models.
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公开(公告)号：US20210277764A1
公开(公告)日：2021-09-09
申请号：US17322165
申请日：2021-05-17
发明人： Tsili Wang
IPC分类号： E21B44/00 , G01V3/12 , G06F16/2455 , G06F16/2457 , G01V3/28 , G01V3/26 , G01V3/30 , G01V3/34 , E21B7/06 , E21B47/024 , E21B47/09 , E21B49/00
摘要： A resistivity measuring tool used in a drillstring having a drill bit on a distal end for drilling a wellbore in a formation includes a tool body having a longitudinal axis, a transmitting antenna, and a receiving antenna. The receiving antenna includes an antenna body having a longer axis disposed longitudinally in the tool body, and a wire coil having a central axis disposed around the antenna body, wherein the wire coil central axis is substantially perpendicular to the longer axis of the antenna body, and wherein the wire coil is configured to generate a magnetic moment orthogonal to the tool body longitudinal axis. The transmitting antenna is configured to transmit electromagnetic energy into the formation and induce a voltage signal related to a parameter of the formation in the receiving antenna.
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公开(公告)号：US20210254958A1
公开(公告)日：2021-08-19
申请号：US17251833
申请日：2019-06-14
发明人： Saad OMAR , Dzevat OMERAGIC
IPC分类号： G01B7/06 , E21B47/085 , G01V3/28
摘要： Embodiments included herein are directed towards a system and method for analyzing an oilfield casing using an apparent thickness approach. Embodiments may include providing an induction instrument having at least one of a transmitter and a receiver configured to operate at one or more frequencies. Embodiments may further include generating, using data acquired by the induction instrument, one or more apparent thickness transforms for at least one of a measured attenuation and a phase response associated with an oilfield casing, wherein generating includes assuming a proportionate increase in all casing thicknesses.
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公开(公告)号：US11086046B2
公开(公告)日：2021-08-10
申请号：US15964713
申请日：2018-04-27
发明人： Hu Li , John Qiang Zhou
摘要： A system and method for the calibration of downhole azimuthally sensitive resistivity tools is disclosed. The system and method can eliminate and/or compensate for the measurement errors due to the electronic circuit, the mechanical structure, etc., of the tool. The system and method also can validate the measurement accuracy. The downhole azimuthal resistivity logging tool can be, but not limited to, the LWD azimuthal resistivity tools with coil(s) oriented in the directions other than the tool axis. In one embodiment, the system is constructed by the azimuthal resistivity tool, a tilted calibration loop made of conductive wire; an external resistor; and an external inductor. Some other method embodiment comprises an azimuthal resistivity tool, a semicircular conductive wire connected with a conductivity rectangular wire, and the external resistor and inductor. Although this disclosure is primarily intended for azimuthal resistivity Logging-While-Drilling (LWD) or Measuring-While-Drilling (MWD) tools, the disclosure is also applicable to wireline and any other possibly equipment.
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公开(公告)号：US11061161B2
公开(公告)日：2021-07-13
申请号：US16462154
申请日：2017-01-10
发明人： Michael Bittar , Jin Ma , Hsu-Hsiang Wu
摘要： An antenna assembly includes a tool mandrel having a tool axis and a coil including a plurality of windings wrapped about the tool mandrel at a winding angle offset from the tool axis. An antenna shield is secured to the tool mandrel and positioned radially outward from the coil. The antenna shield defines a plurality of slots extending perpendicular to the coil at any angular location about a circumference of the tool mandrel and the plurality of slots is provided in two or more dissimilar lengths.
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