CN201221354Y - Near-bit geology guide probe system - Google Patents
Near-bit geology guide probe system Download PDFInfo
- Publication number
- CN201221354Y CN201221354Y CNU2008201085100U CN200820108510U CN201221354Y CN 201221354 Y CN201221354 Y CN 201221354Y CN U2008201085100 U CNU2008201085100 U CN U2008201085100U CN 200820108510 U CN200820108510 U CN 200820108510U CN 201221354 Y CN201221354 Y CN 201221354Y
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Abstract
The utility model provides a near-bit geo-steering detection system, which comprises a resistivity detection unit, a gamma detection unit, a directional sensing unit and an insulated dipole transmitting unit. The resistivity detection unit is used for measuring the near-bit geological resistivity to generate resistivity data; the gamma detection unit is used for measuring the near-bit gamma rays to generate gamma ray data; the directional sensing unit is used for measuring the near-bit hole inclination and the tool surface to generate directional data; and the insulated dipole transmitting unit is used for transmitting the resistivity data, the gamma ray data and the directional data to the ground through wireless electromagnetic channels. The sensor can be close to the bit as much as possible to form prediction in advance for the information at the front part of the bit and the surrounding stratum when the bit drills into the ground, and thus the utility model can achieve the geo-steering purpose in the drilling process.
Description
Technical field
The utility model is about the geosteering measuring technique in measurement while drillings such as oil, mine and geological prospecting or the well logging during, especially in regard to the Radio Transmission Technology of nearly drill bit measurement and underground survey data, be a kind of near-bit geological guiding probe system concretely.
Background technology
In drilling engineerings such as oil, mine, geological prospecting, require wellbore trace is crept into according to the engineering design requirement more accurately, grasp formation information identification oil sheet promptly and accurately improves drilling efficiency, and formation information is transferred to ground in real time.Like this, just can make engineers and technicians in time understand the variation of the track and the formation information of pit shaft.
But in the present drilling engineering, the sensor distance drill bit of a lot of well systems has certain distance, and investigative range is reduced, and detection accuracy descends.Though sensor is installed near the very near place of drill bit in the drilling system that has, but there is not the formation resistivity probe in the formation parameter, and when the sensor acquisition data upload, transmission channel is wireless short pass channel, data can not directly be transferred to ground, must carry out transfer, and then be transferred to ground, so just greatly reduce transfer rate.
U.S. Patent application 5448227 discloses a kind of nearly bit drills well measurements Apparatus for () and method therefor, the sensor of this patent application is installed in the position near drill bit, be used for measuring drilling parameter as the inclination angle of boring, the gamma ray emission on stratum, the resistivity on stratum and some mechanical drilling parameters.By wireless short pass channel, data are passed to measurement while drilling (MWD) earlier, and then pass to ground during the sensor acquisition data.The disclosed technical scheme of this utility model application can be herein incorporated, with as prior art of the present utility model.
U.S. Patent application US00533906A discloses the drilling measuring device that installing electrodes on a kind of flank is used for determining the resistivity of surrounding structure, and the electrode of this patent application is used for measuring the signal that electric current produces, to obtain the resistivity signal.The disclosed technical scheme of this utility model application can be herein incorporated, with as prior art of the present utility model.
The utility model content
In order to overcome defective of the prior art, the utility model provides a kind of near-bit geological guiding probe system.Direct transfer channel and drill bit of engineering parameter sensor, formation parameter sensor, wireless electromagnetic is integrated, make the as close as possible drill bit of sensor, sensor will prediction anterior to drill bit and that peripheral formation information is made early make it reach the purpose of geosteering in drilling process when drill bit creeps into like this.
The purpose of this utility model is, a kind of near-bit geological guiding probe system is provided, and this system comprises power supply and microprocessor, and power supply is connected with microprocessor; This system also comprises: the resistivity probe unit, be connected with microprocessor, and measure nearly drill bit formation resistivity, generate resistivity data; The gamma probe unit is connected with microprocessor, measures nearly drill bit gamma rays, generates the gamma rays data; The orientation sensing unit is connected with microprocessor, measures nearly drill bit hole deviation and tool-face, generates directional data; Insulation dipole transmitter unit is connected with microprocessor, and resistivity data, gamma rays data and directional data are transferred to ground by the wireless electromagnetic channel.
The beneficial effects of the utility model are: make various geosteerings integrated with acquisition sensor, insulation dipole launcher and drill bit, and make the more close drill bit of various acquisition sensors, realized before the drill bit and the prediction of stratum condition around the drill bit, the data that acquisition sensor is gathered are by the emission of insulation dipole antenna, be sent to ground through the wireless electromagnetic channel that direct transfers, thereby drilling design is in time made a strategic decision, in time revised.
Description of drawings
Fig. 1 is the structured flowchart of the utility model device specific embodiment.
Fig. 2 is the structural representation of the utility model device specific embodiment.
Fig. 3 is the workflow diagram of the utility model method specific embodiment.
Fig. 4 is a near-bit geological guidance system schematic diagram of the present utility model.
The specific embodiment
Below in conjunction with the description of drawings specific embodiment of the present utility model.As shown in Figure 1, be the structured flowchart of the utility model device specific embodiment.Near-bit geological guiding probe system shown in Figure 1 comprises: the resistivity probe unit, be used to measure nearly drill bit formation resistivity, and generate resistivity data; The gamma probe unit is used to measure nearly drill bit gamma rays, generates the gamma rays data; The orientation sensing unit is used to measure nearly drill bit hole deviation and tool-face, generates directional data; Insulation dipole transmitter unit is used for resistivity data, gamma rays data and directional data are transferred to ground by the wireless electromagnetic channel.The directional filtering circuit is connected with the orientation sensing unit, is used for the directional data that the orientation sensing unit that receives transmits is carried out filtering, and directional data after the output filtering; Resistivity amplification/filtering/change-over circuit is connected with described resistivity probe unit, be used for to the resistivity data that the resistivity probe unit that receives transmits amplify, the processing of filtering and A/D conversion, the back resistivity data is handled in output; Microprocessor, be connected with directional filtering circuit, resistivity amplification/filtering/change-over circuit and gamma probe unit respectively, and to directional data after the described filtering, handle the back resistivity data and the gamma rays data are handled, generate the geosteering data.The emission amplifying circuit is connected with microprocessor and insulation dipole transmitter unit respectively, be used for the geosteering data are amplified, and the geosteering data after will amplifying sends the dipole transmitter unit that insulate to and launch; Memory is connected with microprocessor, is used to store the geosteering data.Turbine drives and generator; Turbine drives drives generator for electricity generation, and system provides electric energy for the utility model.
As shown in Figure 2, be the structural representation of the utility model device specific embodiment.In Fig. 2, the near-bit geological guiding probe system 2 that becomes one with drill bit is installed on the drill bit boots 1 of helicoid hydraulic motor or drill collar, on the drill bit boots of near-bit geological guiding probe system 2 lower ends drill bit is installed again.
The basic structure body of near-bit geological guiding probe system 2 is made of the first insulation dipole pipe nipple 26 and the second insulation dipole pipe nipple 13, and two sections insulation dipole pipe nipples are made with titanium alloy, and two sections insulation dipole pipe nipples can be threaded.The spiral shell button surface that is connected at the first insulation dipole pipe nipple 26 and the second insulation dipole pipe nipple 13 generates the insulating layer that a layer thickness is 30-100 μ m with electrochemical method, just can form two electrodes that separated by insulating layer when the first insulation dipole pipe nipple 26 and second insulate after dipole pipe nipple 13 is connected like this, dipole had both insulated.
After the first insulation dipole pipe nipple 26 and the second insulation dipole pipe nipple 13 are connected, be the sealing that guarantees to connect the spiral shell button, with abrasion-proof insulating fiber and fire resistant resin formation sealed insulation ring 12, dead ring 15 and dead ring 14.
The first insulation dipole pipe nipple, 26 inside are formed with first cavity; The second insulation dipole pipe nipple, 13 inside are formed with second cavity; The first insulation dipole pipe nipple and second insulate the dipole pipe nipple for being threaded, and by described dead ring electrical isolation, first cavity is connected with second cavity.
Have an elongated slot on the survey wall of the first insulation dipole pipe nipple 26, gamma ray detectors is installed, the circuit lead of gamma ray detectors is guided in the circuit storehouse 7 by seal nipple 9.
The receiving sensor of resistivity probe is installed on the second insulation dipole pipe nipple 13; receiving sensor passes coil 19 by circular reception; circular containment vessel 20; coil storehouse shading ring 17; coil storehouse shading ring 22; dead ring 21, dead ring 16 and receiving sensor structure hold-down ring 23 constitute.Dead ring 21 and dead ring 16 are made greater than 200 purpose ceramic powder particles by high-temperature resin and grain fineness.
Receiving the lead-in wire that passes coil 19 is incorporated in the resistance to compression protecting bin 11 by seal nipple 18; Orientation sensor 10, circuit module 7, generator 5 are installed in by generator warehouse tube 4, connector 8, and resistance to compression protecting bin (11) sealing termination 24 is in the storehouse tube that insulated connecting piece 25 constitutes.Insulated connecting piece 25 is made by the insulation materials polytetrafluoroethylene (PTFE).
As shown in Figure 3, the utility model workflow comprises following steps: turbine drives drives generator work, is all probes, sensor and circuit module power supply S101; Resistivity probe, gamma detector, the orientation sensor image data of under the control of microprocessor, working simultaneously separately, and deposit the data of gathering in memory S102; The resistivity probe is S103 on the two poles of the earth that by power amplifier one voltage U signal are applied to dipole under the microprocessor control; Alternating voltage U on the electrode is by the electric current I of stratum generation with the voltage U same frequency, and coil detects current IS 104; Through amplification, filtering, the A/D translation circuit is sent signal I into microprocessor S105; Obtain stratum R and stratum rate ρ by Ohm's law, and deposit data in memory S106; Send into power amplifier after data in memory are modulated by microprocessor and after amplifying, deliver to again on two electrodes of dipole, thus the electromagnetic signal width of cloth is injected the stratum and be sent to ground S107.
As shown in Figure 4, the measurement of formation resistivity adopts the insulation dipole launcher directly detecting voltage to be applied on the stratum, as long as in the scope of transmitting power permission, detecting voltage is exactly a steady state value that can directly monitor like this, and this just can improve detection accuracy widely.Owing to adopted the insulation dipole to make drill bit, drill collar form the two poles of the earth of hertz electric dipole, thereby set up the wireless electromagnetic transmission channel, when downhole generator provided certain power, the data of drill bit top integrated sensor collection just can directly be transferred to ground by the wireless electromagnetic transmission channel.Near-bit geological guidance system operating principle is as follows:
(mud flow rate: turbine drives 3 drives generators 5 work 28-30L/s) or under the impact of high velocity gas stream (gas flow: greater than 60m3/min), makes it produce electric energy more than 100 watts in slurry flows.This generator is a probe all in the system, sensor and circuit module 7 power supplies; Circuit module 7 comprises: the directional filtering circuit, be connected with described orientation sensing unit, and be used for the directional data that the orientation sensing unit that receives transmits is carried out filtering, and directional data after the output filtering; Resistivity amplification/filtering/change-over circuit is connected with described resistivity probe unit, be used for to the resistivity data that the resistivity probe unit that receives transmits amplify, the processing of filtering and A/D conversion, the back resistivity data is handled in output; Microprocessor, be connected with described directional filtering circuit, resistivity amplification/filtering/change-over circuit and gamma probe unit respectively, and to directional data after the described filtering, handle the back resistivity data and the gamma rays data are handled, generate the geosteering data.The emission amplifying circuit is connected with the described microprocessor and the dipole transmitter unit that insulate respectively, be used for described geosteering data are amplified, and the geosteering data after will amplifying sends described insulation dipole transmitter unit to and launch; Memory is connected with described microprocessor, is used to store described geosteering data.
Resistivity probe, gamma detector 6, orientation sensor 10 image data of under the control of microprocessor, working simultaneously separately, and deposit the data of gathering in memory 34.The resistivity probe is that the voltage signal of U is applied on the two poles of the earth (26,13) of dipole with one frequency f=1KHz amplitude by power amplifier 27 under microprocessor 30 control, alternating voltage U on the electrode is by the electric current I 28 of stratum generation with the voltage U same frequency, electric current I is detected by coil 19, through amplifying, filtering, A/D translation circuit 35 is sent signal I into microprocessor, obtains stratum R and stratum rate ρ by Ohm's law, and deposits data in memory.
Send into power amplifier 27 after data in memory 34 are modulated by microprocessor 30 and after amplifying, deliver to again on two electrodes of dipole, thus electromagnetic signal 33 width of cloth are injected the stratum and be sent to ground.
Embodiment
Present embodiment, connect titanium alloy pipe nipple (26,13) as matrix with two sections through insulation, realize the integrated of geosteering system and drill bit on this basis, the geosteering system that forms with the method has following nearly drill bit measurement function: 1. near drill bit formation resistivity is measured; 2. near drill bit gamma rays is measured; 3. near drill bit hole deviation and tool-face are measured; 4. various survey data once are transferred to ground by the wireless electromagnetic channel.
The geosteering system integrated with drill bit is made up of following part: the first titanium alloy pipe nipple 26, the second titanium alloy pipe nipple 13, sealed insulation ring 12, dead ring 15 and dead ring 14, dead ring 16, shading ring 17, circular reception pass the nearly drill bit formation resistivity probe of coil 19, circular containment vessel 20, dead ring 21 formations.
Gamma detector 6.Measure the orientation sensor 10 of hole deviation and tool-face.Set up the dipole (26,13) of downhole wireless electromagnetic transmission channel, this dipole also is a formation resistivity probe part; Power output is greater than the down-hole turbine generator (3,5) of 100W; Circuit module 7.Constitute dipole by two sections titanium alloys (26,13), the upper end of a utmost point 26 of its dipole is installed on the drill bit boots of helicoid hydraulic motor or drill collar, and drill bit then is installed on the drill bit boots of another utmost point 13 of dipole.
Dipole (26,13) has two kinds of functions, and the firstth, can be used as the detection transmitter of formation resistivity, the secondth, can be used as the transmitting antenna of downhole wireless electromagnetic transmission channel.
Channel and drill bit are integrated because engineering parameter sensor, formation parameter sensor, wireless electromagnetic direct transfer, at first make the more close drill bit of various sensors can predict before the drill bit in advance and stratum condition around the drill bit, secondly the data of sensor acquisition are sent to ground immediately by integrated dipole antenna, make drilling engineer and geol in time make decisions, in time revise drilling design.
Therefore the above specific embodiment only is used to illustrate the utility model, but not is used to limit the utility model.
Claims (10)
1. near-bit geological guiding probe system, described system comprises: power supply and microprocessor, described power supply is connected with microprocessor; It is characterized in that described system also comprises:
The resistivity probe unit is connected with described microprocessor, measures nearly drill bit formation resistivity, generates resistivity data;
The gamma probe unit is connected with described microprocessor, measures nearly drill bit gamma rays, generates the gamma rays data;
The orientation sensing unit is connected with described microprocessor, measures nearly drill bit hole deviation and tool-face, generates directional data;
Insulation dipole transmitter unit is connected with described microprocessor, and described resistivity data, gamma rays data and directional data are transferred to ground by the wireless electromagnetic channel.
2. near-bit geological guiding probe system according to claim 1 is characterized in that, described insulation dipole transmitter unit comprises: the first insulation dipole pipe nipple, second insulation dipole pipe nipple and the dead ring;
The described first insulation dipole pipe nipple and second insulate the dipole pipe nipple for being threaded, and by described dead ring electrical isolation.
3. near-bit geological guiding probe system according to claim 2 is characterized in that, described gamma probe unit and orientation sensing unit are installed on the described first insulation dipole pipe nipple.
4. near-bit geological guiding probe system according to claim 2 is characterized in that, described resistivity probe unit comprises: resistivity receiving sensor, described resistivity receiving sensor are installed on the described second insulation dipole pipe nipple.
5. near-bit geological guiding probe system according to claim 1 is characterized in that, described system also comprises:
The directional filtering circuit is connected with the orientation sensing unit with described microprocessor respectively, and the directional data that the orientation sensing unit that receives is transmitted carries out filtering, and directional data after the filtering is sent to described microprocessor;
Resistivity amplification/filtering/change-over circuit, be connected with the resistivity probe unit with described microprocessor respectively, the resistivity data that the resistivity probe unit that receives is transmitted amplifies, the processing of filtering and A/D conversion, and will handle afterwards that resistivity data sends to described microprocessor.
6. near-bit geological guiding probe system according to claim 5 is characterized in that, described system also comprises:
The emission amplifying circuit is connected with the described microprocessor and the dipole transmitter unit that insulate respectively, described geosteering data are amplified, and the geosteering data after will amplifying sends described insulation dipole transmitter unit to and launch;
Memory is connected with described microprocessor, stores described geosteering data.
7. near-bit geological guiding probe system according to claim 6 is characterized in that, described power supply comprises: turbine drives and generator; Described turbine drives drives described generator for electricity generation, for described system provides electric energy.
8. near-bit geological guiding probe system according to claim 7 is characterized in that, described insulation dipole transmitter unit comprises: the first insulation dipole pipe nipple, second insulation dipole pipe nipple and the dead ring;
The described first insulation dipole pipe nipple inside is formed with first cavity;
The described second insulation dipole pipe nipple inside is formed with second cavity;
The described first insulation dipole pipe nipple and second insulate the dipole pipe nipple for being threaded, and by described dead ring electrical isolation, described first cavity is connected with second cavity.
9. near-bit geological guiding probe system according to claim 8, it is characterized in that described turbine drives, generator, directional filtering circuit, resistivity amplification/filtering/change-over circuit, microprocessor, emission amplifying circuit and memory are installed in described first cavity;
Described orientation sensing unit is installed in described second cavity.
10. near-bit geological guiding probe system according to claim 4, it is characterized in that, the resistivity receiving sensor comprises receiving coil, described receiving coil is installed on the described second insulation dipole pipe nipple, and the distance of the tip to face distance drill bit bottom surface of this receiving coil is 350mm to 400mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNU2008201085100U CN201221354Y (en) | 2008-06-11 | 2008-06-11 | Near-bit geology guide probe system |
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| CNU2008201085100U CN201221354Y (en) | 2008-06-11 | 2008-06-11 | Near-bit geology guide probe system |
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| CN201221354Y true CN201221354Y (en) | 2009-04-15 |
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| CNU2008201085100U Expired - Fee Related CN201221354Y (en) | 2008-06-11 | 2008-06-11 | Near-bit geology guide probe system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102418516A (en) * | 2011-12-30 | 2012-04-18 | 中天启明石油技术有限公司 | Near-bit orientation parameter measuring device while drilling |
| CN102425409A (en) * | 2011-11-10 | 2012-04-25 | 中国石油天然气集团公司 | Well deflection and tool face measurement device and vertical drilling device |
| CN103033853A (en) * | 2012-12-27 | 2013-04-10 | 吉林航空维修有限责任公司 | Mineral prospecting system |
| CN103883320A (en) * | 2014-03-26 | 2014-06-25 | 中国石油天然气集团公司 | Logging-while-drilling method based on time lapse |
| CN106200455A (en) * | 2016-06-23 | 2016-12-07 | 中国石油集团钻井工程技术研究院 | A kind of signal playback device and method measured for VSP during drilling |
| CN106246163A (en) * | 2016-08-31 | 2016-12-21 | 中国科学院地质与地球物理研究所 | Nearly drill bit dynamic directional survey method and device |
| US9970288B2 (en) | 2016-08-31 | 2018-05-15 | Institute of geology and geophysics, Chinese Academy of Science | Receiving apparatus for downhole near-bit wireless transmission |
| US10025003B1 (en) | 2017-01-19 | 2018-07-17 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Calibration method under near-bit wireless short-transmission ground envrionment based on electric field theory |
| US10030504B2 (en) | 2016-11-21 | 2018-07-24 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Receiving apparatus suitable for azimuthally acoustic logging while drilling |
| CN108442926A (en) * | 2018-06-05 | 2018-08-24 | 北京捷威思特科技有限公司 | A kind of nearly drill bit electromagnetic resistivity adds gamma ray logger |
| US10082021B2 (en) | 2016-11-21 | 2018-09-25 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Azimuthally acoustic while drilling signal receiving transducer encapsulating apparatus |
| CN108661624A (en) * | 2018-05-09 | 2018-10-16 | 中国地质大学（武汉） | A kind of tool face azimuth sensor based on distributed resistance |
| US10120795B2 (en) | 2016-09-21 | 2018-11-06 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Wear-leveling nandflash memory reading/writing method |
| CN109322662A (en) * | 2018-12-05 | 2019-02-12 | 贝兹维仪器(苏州)有限公司 | A kind of measurement while drilling pipe nipple |
| US10202841B2 (en) | 2016-08-29 | 2019-02-12 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Near-bit tool attitude measurement while drilling apparatus and method |
| US10428646B2 (en) | 2016-08-31 | 2019-10-01 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Apparatus for downhole near-bit wireless transmission |
| US10578754B2 (en) | 2017-01-19 | 2020-03-03 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Sinusoidal excitation method and apparatus for multi-pole acoustic logging while drilling |
| US10662764B2 (en) | 2016-08-31 | 2020-05-26 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Near-bit constant-power wireless short-distance transmission method and apparatus |
| CN113309506A (en) * | 2021-05-18 | 2021-08-27 | 山东大学 | Advanced observation method and device based on electric dipole emission in hole |
| CN114320282A (en) * | 2022-01-13 | 2022-04-12 | 苏州中科地星创新技术研究所有限公司 | Double-transmission-mode transmission device suitable for near-bit instrument |
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| CN102425409A (en) * | 2011-11-10 | 2012-04-25 | 中国石油天然气集团公司 | Well deflection and tool face measurement device and vertical drilling device |
| CN102418516B (en) * | 2011-12-30 | 2014-12-17 | 中天启明石油技术有限公司 | Near-bit orientation parameter measuring device while drilling |
| CN102418516A (en) * | 2011-12-30 | 2012-04-18 | 中天启明石油技术有限公司 | Near-bit orientation parameter measuring device while drilling |
| CN103033853A (en) * | 2012-12-27 | 2013-04-10 | 吉林航空维修有限责任公司 | Mineral prospecting system |
| CN103033853B (en) * | 2012-12-27 | 2016-02-10 | 吉林航空维修有限责任公司 | A kind of mine locating system |
| CN103883320A (en) * | 2014-03-26 | 2014-06-25 | 中国石油天然气集团公司 | Logging-while-drilling method based on time lapse |
| CN103883320B (en) * | 2014-03-26 | 2017-06-06 | 中国石油天然气集团公司 | With brill time-lapse logging method |
| CN106200455B (en) * | 2016-06-23 | 2018-12-11 | 中国石油集团钻井工程技术研究院 | A kind of signal playback device and method for VSP during drilling measurement |
| CN106200455A (en) * | 2016-06-23 | 2016-12-07 | 中国石油集团钻井工程技术研究院 | A kind of signal playback device and method measured for VSP during drilling |
| US10202841B2 (en) | 2016-08-29 | 2019-02-12 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Near-bit tool attitude measurement while drilling apparatus and method |
| US10428646B2 (en) | 2016-08-31 | 2019-10-01 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Apparatus for downhole near-bit wireless transmission |
| CN106246163A (en) * | 2016-08-31 | 2016-12-21 | 中国科学院地质与地球物理研究所 | Nearly drill bit dynamic directional survey method and device |
| US10662764B2 (en) | 2016-08-31 | 2020-05-26 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Near-bit constant-power wireless short-distance transmission method and apparatus |
| US9970288B2 (en) | 2016-08-31 | 2018-05-15 | Institute of geology and geophysics, Chinese Academy of Science | Receiving apparatus for downhole near-bit wireless transmission |
| CN106246163B (en) * | 2016-08-31 | 2017-07-14 | 中国科学院地质与地球物理研究所 | The nearly dynamic directional survey method and device of drill bit |
| US10317204B2 (en) | 2016-08-31 | 2019-06-11 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Near-bit dynamic well deviation angle measurement method and apparatus |
| US10120795B2 (en) | 2016-09-21 | 2018-11-06 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Wear-leveling nandflash memory reading/writing method |
| US10030504B2 (en) | 2016-11-21 | 2018-07-24 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Receiving apparatus suitable for azimuthally acoustic logging while drilling |
| US10082021B2 (en) | 2016-11-21 | 2018-09-25 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Azimuthally acoustic while drilling signal receiving transducer encapsulating apparatus |
| US10025003B1 (en) | 2017-01-19 | 2018-07-17 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Calibration method under near-bit wireless short-transmission ground envrionment based on electric field theory |
| US10578754B2 (en) | 2017-01-19 | 2020-03-03 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Sinusoidal excitation method and apparatus for multi-pole acoustic logging while drilling |
| CN108661624A (en) * | 2018-05-09 | 2018-10-16 | 中国地质大学（武汉） | A kind of tool face azimuth sensor based on distributed resistance |
| CN108661624B (en) * | 2018-05-09 | 2020-05-22 | 中国地质大学（武汉） | Tool face angle sensor based on distributed resistance |
| CN108442926A (en) * | 2018-06-05 | 2018-08-24 | 北京捷威思特科技有限公司 | A kind of nearly drill bit electromagnetic resistivity adds gamma ray logger |
| CN109322662A (en) * | 2018-12-05 | 2019-02-12 | 贝兹维仪器(苏州)有限公司 | A kind of measurement while drilling pipe nipple |
| CN113309506A (en) * | 2021-05-18 | 2021-08-27 | 山东大学 | Advanced observation method and device based on electric dipole emission in hole |
| CN113309506B (en) * | 2021-05-18 | 2023-02-03 | 山东大学 | Advanced observation method and device based on electric dipole emission in hole |
| CN114320282A (en) * | 2022-01-13 | 2022-04-12 | 苏州中科地星创新技术研究所有限公司 | Double-transmission-mode transmission device suitable for near-bit instrument |
| CN114320282B (en) * | 2022-01-13 | 2022-09-23 | 苏州中科地星创新技术研究所有限公司 | Double-transmission-mode transmission device suitable for near-bit instrument |
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