CN103306668A - EM-MWD (electromagnetic-measurement-while-drilling) transmission system for prolonging antenna lower arm - Google Patents
EM-MWD (electromagnetic-measurement-while-drilling) transmission system for prolonging antenna lower arm Download PDFInfo
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- CN103306668A CN103306668A CN2013101730469A CN201310173046A CN103306668A CN 103306668 A CN103306668 A CN 103306668A CN 2013101730469 A CN2013101730469 A CN 2013101730469A CN 201310173046 A CN201310173046 A CN 201310173046A CN 103306668 A CN103306668 A CN 103306668A
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Abstract
The invention provides an EM-MWD (electromagnetic-measurement-while-drilling) transmission system for prolonging an antenna lower arm. The system comprises drill stems, a drill collar, a drilling tool, an EM-MWD module, an electromagnetic signal receiving module, a relay emitting module and a relay receiving module, wherein the EM-MWD module is arranged between the drill stems; the drill stem above the EM-MWD module serves as an antenna upper arm; the drill stem below the EM-MWD module, the drill collar and the drilling tool form the antenna lower arm; the relay emitting module is arranged between the drill stems and the drilling tool; the relay receiving module is arranged below the EM-MWD module and is connected with an electromagnetic signal emitting module in the EM-MWD module through a transmission line. The transmission performance is improved by prolonging the dipole antenna lower arm of the current EM-MWD system. The relay emitting module and the relay receiving module are added to the two ends of the antenna lower arm so that the information of a detector or a sensor can be still transmitted to the EM-MWD module in a wireless way after the lower arm is prolonged.
Description
Technical field
The invention belongs to boring transmission technology, particularly with the wireless electromagnetic transmission technology of boring signal.
Background technology
In petroleum detection and other geological drilling engineerings, utilizing metal drill pipe is one of research focus in recent years as asymmetric excitation dipole antenna with electromagnetic measurement while drilling (EM-MWD) technology that realizes the transmission of well logging during signal.The method has overcome the shortcoming that mud-pulse can not be used in air drilling, and quality of mud fluid is not required.This system as antenna, adds insulation short circuit by the upper end at nearly drill bit with drilling rod, adds electric excitation at the upper/lower terminal of insulation short circuit.Therefore consist of an extremely asymmetric dipole antenna by what the insulation short circuit was cut apart as the drilling rod of antenna upper arm with as the drilling tool of antenna underarm.In the general EM-MWD system, usually will insulate short circuit and electromagnetic signal emitting module are set together and consist of the EM-MWD module.From theory and Numerical Simulation Analysis, the lower arm lengths of extremely asymmetric utmost point antenna is larger on the transmission performance impact, thereby affects transmission range.
Summary of the invention
Technical problem to be solved by this invention is that a kind of EM-MWD system that can extend transmission distance is provided.
The present invention solves the problems of the technologies described above the technical scheme that adopts to be, the EM-MWD transmission system of extension antenna underarm comprises drilling rod, drill collar, drilling tool, EM-MWD module, electromagnetic signal receiver module; Drill collar is connected between drilling tool and the drilling rod, and the electromagnetic signal receiver module is arranged at ground; The EM-MWD module comprises insulation short circuit and electromagnetic signal emitting module;
It is characterized in that, also comprise repeat transmitted module, relay reception module; The EM-MWD module is arranged between the drilling rod, be positioned at drilling rod on the EM-MWD module as the antenna upper arm, the drilling rod, drill collar and the drilling tool that are positioned under the EM-MWD module consist of the antenna underarm, the repeat transmitted module is arranged between bull stick and the drilling tool, the relay reception module is arranged under the EM-MWD module, and the relay reception module links to each other with electromagnetic signal emitting module in the EM-MWD module by transmission line;
The repeat transmitted module is arranged in the drill collar inner annular groove, and the repeat transmitted module comprises loop aerial, radiating circuit, and loop aerial is arranged on the radiating circuit in the annular groove, and loop aerial links to each other by transmission line with radiating circuit; With the top coat of metal is set in the radiating circuit outside, radiating circuit is enclosed in the space of coat of metal and annular groove formation; Space between loop aerial and the annular groove uses dielectric to fill;
EM-MWD module and relay reception module are arranged in the same metal drill pipe short circuit, the relay reception module comprises loop aerial, receiving circuit, battery, loop aerial, receiving circuit and battery are arranged in the annular groove of metal drill pipe short circuit exterior bottom, and loop aerial links to each other by transmission line with receiving circuit; Receiving circuit and battery are parallel in the annular groove places, receiving circuit and battery are arranged on the loop aerial, the outside and bottom at receiving circuit and battery arrange coat of metal, and receiving circuit and battery are enclosed in the space of coat of metal and annular groove formation; Space between loop aerial and the annular groove uses dielectric to fill; Described dielectric is the Wear-resistant, high-temperature resistant dielectric.
The present invention improves transmission performance by the dipole antenna underarm that prolongs existing EM-MWD system.For the probe that guarantees the drilling tool place or the information of sensor can reach the EM-MWD module smoothly, the present invention has increased repeat transmitted module and receiver module at the two ends of antenna underarm, so that still can the information of probe or sensor be reached the EM-MWD module by wireless mode after prolonging underarm.
Further, in order to increase the length of antenna underarm, also comprise the relaying short circuit module more than 1 or 1, the relaying short circuit module is arranged between repeat transmitted module and the relay reception module;
The relaying short circuit module comprises metal drill pipe short circuit, 2 groups of loop aerials, relaying amplifying circuit, battery; The metal drill pipe short circuit is connected between the two sections drilling rod; 2 groups of loop aerials, relaying amplifying circuit, batteries are arranged in the metal drill pipe short circuit inner annular groove; One group of loop aerial is arranged on the relaying amplifying circuit in the annular groove, another group loop aerial is arranged under the relaying amplifying circuit, battery and relaying amplifying circuit are parallel in the annular groove is placed between 2 groups of loop aerials, the output of battery links to each other with the power input of relaying amplifying circuit, and 2 groups of loop aerials link to each other with the relaying amplifying circuit by transmission line respectively; The outside, top and bottom at relaying amplifying circuit and battery arrange coat of metal, and relaying amplifying circuit and battery together are enclosed in the space of coat of metal and annular groove formation; Space between 2 groups of loop aerials and the annular groove uses dielectric to fill.
Especially, in order to improve the transmission range of wireless data, in repeat transmitted, relay reception module and relaying short circuit module, add respectively the metal construction of shielding guiding, thereby strengthened directionality and the gain of antenna.
The invention has the beneficial effects as follows, can effectively prolong the transmission range of existing EM-MWD system.
Description of drawings
Fig. 1 is that the ground receiver voltage is with the situation of change of arm lengths under the antenna;
Fig. 2 is the EM-MWD system schematic of extension antenna underarm of the present invention.
Fig. 3 is the vertical section schematic diagram for embodiment repeat transmitted module.
Fig. 4 is the vertical section schematic diagram that includes the metal drill pipe short circuit of EM-MWD module and relay reception module for embodiment.
Fig. 5 has increased the system schematic behind the trunk module among the embodiment.
Fig. 6 is the vertical section schematic diagram of embodiment relaying short circuit module.
The specific embodiment
In the transmission course of existing EM-MWD system, utilize drilling rod as dipole antenna, the length of underarm L2 is usually much smaller than the length of upper arm L1, so the length of underarm has considerable influence to transmission performance.Investigated the impact of time arm lengths on transmission performance by emulation, hypothesized model is as follows: get transmission frequency f=5Hz, the input power that is added in two ends of drill is 1W, and being in ground reception antenna horizontal length is 60m, and formation conductivity is 0.05S/m.The voltage that receive on ground this moment is with the relation between the lower arm lengths such as Fig. 1.Increase as can be seen from Figure 1 underarm and can obviously improve the voltage that receives, when underarm rose to 200m from 10m, the voltage that receives can improve about 10dB.Therefore the length that improves underarm can increase the transmission range of EM-MWD.
It is 1W that following table has further provided the input power that is added in two ends of drill, the receiver voltage V when different upper arm L1, underarm L2 length, and wherein, ± 0.5,0 represents that respectively receiver voltage is positioned on the ground (descending) 0.5m, place, ground.Can find out the value that can obviously improve receiver voltage when increasing lower arm lengths.Thereby can increase the EM-MWD transmission range.
The present invention comprises drilling rod 1, drill collar 2, drilling tool 3, electromagnetic signal receiver module 4, EM-MWD module, repeat transmitted module, relay reception module as shown in Figure 1; Drill collar is connected between drilling tool and the drilling rod, and the electromagnetic signal receiver module is arranged at ground; The EM-MWD module comprises insulation short circuit and electromagnetic signal emitting module;
The EM-MWD module is arranged between the drilling rod, be positioned at drilling rod on the EM-MWD module as antenna upper arm L1, the drilling rod, drill collar and the drilling tool that are positioned under the EM-MWD module consist of antenna underarm L2, the repeat transmitted module is arranged between bull stick and the drilling tool, the relay reception module is arranged under the EM-MWD module, and the relay reception module links to each other with electromagnetic signal emitting module in the EM-MWD module by transmission line.
The present invention is by increasing a repeat transmitted module and relay reception module in EM-MWD module lower end, the signal of downhole sensor and connector for logging while drilling is passed to first repeat transmitted module 32,32 pairs of these signals of repeat transmitted module are modulated, then pass to the relay reception module below the EM-MWD module, the relay reception module links to each other by transmission line with the EM-MWD module.Therefore the EM-MWD module can be near connector for logging while drilling and the sensor of down-hole, thereby the extension antenna underarm finally improves the transmission range of EM-MWD system.
The repeat transmitted module as shown in Figure 3, the repeat transmitted module is arranged in drill collar 2 inner annular groove, the repeat transmitted module comprises loop aerial, radiating circuit 21; Loop aerial is comprised of the soft magnetic materials 23 of annular and the coil 24 that is looped around outside the soft magnetic materials.Loop aerial is arranged on the radiating circuit in the annular groove, and loop aerial links to each other by transmission line with radiating circuit; With the top coat of metal 25 is set in the radiating circuit outside, radiating circuit is enclosed in the space of coat of metal and annular groove formation; Space between loop aerial and the annular groove uses Wear-resistant, high-temperature resistant dielectric 26 to fill.Radiating circuit comprises signal modulation circuit and power rate amplifying circuit.The signal that downhole sensor and logging while drilling apparatus record is passed to radiating circuit by transmission line, radiating circuit to its modulate with power amplification after, pass to loop aerial by transmission line again.
The repeat transmitted module can adopt the downhole generator power supply, also can adopt powered battery.During the sampling powered battery; battery 26 is placed under the loop aerial with radiating circuit is parallel in the annular groove; the output of battery links to each other with the power input of transmitter module; with the top coat of metal 25 is set in the battery outside, battery and radiating circuit together are enclosed in the space of coat of metal and annular groove formation.
Conventional EM-MWD module 53 is arranged in the same metal drill pipe short circuit 5 with relay reception module 54, as shown in Figure 4, all has thread groove 51 and 52 at the upper/lower terminal of metal drill pipe short circuit 5, is convenient to directly dock with drilling rod.The relay reception module comprises loop aerial, receiving circuit 541, battery 546.Loop aerial is comprised of the soft magnetic materials 542 of annular and the coil 543 that is looped around outside the soft magnetic materials.Receiving circuit and battery are arranged in the annular groove of metal drill pipe short circuit exterior bottom, and loop aerial links to each other by transmission line with receiving circuit; Receiving circuit and battery are parallel in the annular groove places, receiving circuit and battery are arranged on the loop aerial, the outside and bottom at receiving circuit and battery arrange coat of metal 544, and receiving circuit and battery are enclosed in the space of coat of metal and annular groove formation; Space between loop aerial and the annular groove uses Wear-resistant, high-temperature resistant dielectric 545 to fill.The relay reception module receives the signal that launches from the repeat transmitted module, then by receiving circuit to this signal amplify, filtering processes, and passes to conventional EM-MWD module by transmission line again.
Further, in order mechanically to avoid stress to concentrate guide electromagnetic waves directional transmissions on transmission performance.In the repeat transmitted module, loop aerial arranged outside metal screen layer 25 in annular groove, loop aerial is by the dielectric transmission of electromagnetic signals at its top; The top of annular groove is arc.In the relay reception module, loop aerial arranged outside metal screen layer 544 in annular groove, loop aerial is by the dielectric receiving electromagnetic signals of its bottom; The annular groove bottom is arc.
For the length that further increases the EM-MWD underarm can be descended the relaying short circuit module 6 of increase more than 1 or 1 between repeat transmitted module and relay reception module, as shown in Figure 5.
The relaying short circuit module comprises metal drill pipe short circuit, 2 groups of loop aerials, relaying amplifying circuit 62, battery 63 as shown in Figure 6; Metal drill pipe short circuit upper/lower terminal all has thread groove 64 and 65, is connected between the two sections drilling rod by thread groove; 2 groups of loop aerials, relaying amplifying circuit, batteries are arranged in the metal drill pipe short circuit inner annular groove; One group of loop aerial is arranged on the relaying amplifying circuit in the annular groove, another group loop aerial is arranged under the relaying amplifying circuit, battery and relaying amplifying circuit are parallel in the annular groove is placed between 2 groups of loop aerials, the output of battery links to each other with the power input of relaying amplifying circuit, and 2 groups of loop aerials link to each other with the relaying amplifying circuit by transmission line respectively; The outside, top and bottom at relaying amplifying circuit and battery arrange coat of metal 68, and relaying amplifying circuit and battery together are enclosed in the space of coat of metal and annular groove formation; Space between 2 groups of loop aerials and the annular groove uses dielectric 69 to fill.
Further, in order mechanically to avoid stress to concentrate guide electromagnetic waves directional transmissions on transmission performance.In the relaying short circuit module, the arranged outside metal screen layer 68 of the loop aerial in annular groove on the relaying amplifying circuit, this loop aerial is by the dielectric transmission of electromagnetic signals at its top; The arranged outside metal screen layer 68 of the loop aerial in annular groove under the relaying amplifying circuit, this loop aerial are by the dielectric receiving electromagnetic signals of its bottom, and the bottom of annular groove and top are arc.
Claims (6)
1. the EM-MWD transmission system of extension antenna underarm comprises drilling rod, drill collar, drilling tool, EM-MWD module, electromagnetic signal receiver module; Drill collar is connected between drilling tool and the drilling rod, and the electromagnetic signal receiver module is arranged at ground; The EM-MWD module comprises insulation short circuit and electromagnetic signal emitting module;
It is characterized in that, also comprise repeat transmitted module, relay reception module; The EM-MWD module is arranged between the drilling rod, be positioned at drilling rod on the EM-MWD module as the antenna upper arm, the drilling rod, drill collar and the drilling tool that are positioned under the EM-MWD module consist of the antenna underarm, the repeat transmitted module is arranged between drilling rod and the drilling tool, the relay reception module is arranged under the EM-MWD module, and the relay reception module links to each other with electromagnetic signal emitting module in the EM-MWD module by transmission line;
The repeat transmitted module is arranged in the drill collar inner annular groove, and the repeat transmitted module comprises loop aerial, radiating circuit, and loop aerial is arranged on the radiating circuit in the annular groove, and loop aerial links to each other by transmission line with radiating circuit; With the top coat of metal is set in the radiating circuit outside, radiating circuit is enclosed in the space of coat of metal and annular groove formation; Space between loop aerial and the annular groove uses dielectric to fill;
EM-MWD module and relay reception module are arranged in the same metal drill pipe short circuit, the relay reception module comprises loop aerial, receiving circuit, battery, loop aerial, receiving circuit and battery are arranged in the annular groove of metal drill pipe short circuit exterior bottom, and loop aerial links to each other by transmission line with receiving circuit; Receiving circuit and battery are parallel in the annular groove places, receiving circuit and battery are arranged on the loop aerial, the outside and bottom at receiving circuit and battery arrange coat of metal, and receiving circuit and battery are enclosed in the space of coat of metal and annular groove formation; Space between loop aerial and the annular groove uses dielectric to fill; Described dielectric is the Wear-resistant, high-temperature resistant dielectric.
2. the EM-MWD transmission system of extension antenna underarm as claimed in claim 1 is characterized in that, also comprise the relaying short circuit module more than 1 or 1, the relaying short circuit module is arranged between repeat transmitted module and the relay reception module;
The relaying short circuit module comprises metal drill pipe short circuit, 2 groups of loop aerials, relaying amplifying circuit, battery; The metal drill pipe short circuit is connected between the two sections drilling rod; 2 groups of loop aerials, relaying amplifying circuit, batteries are arranged in the metal drill pipe short circuit inner annular groove; One group of loop aerial is arranged on the relaying amplifying circuit in the annular groove, another group loop aerial is arranged under the relaying amplifying circuit, battery and relaying amplifying circuit are parallel in the annular groove is placed between 2 groups of loop aerials, the output of battery links to each other with the power input of relaying amplifying circuit, and 2 groups of loop aerials link to each other with the relaying amplifying circuit by transmission line respectively; The outside, top and bottom at relaying amplifying circuit and battery arrange coat of metal, and relaying amplifying circuit and battery together are enclosed in the space of coat of metal and annular groove formation; Space between 2 groups of loop aerials and the annular groove uses dielectric to fill.
3. the EM-MWD transmission system of extension antenna underarm as claimed in claim 1 or 2 is characterized in that, in the repeat transmitted module, and loop aerial arranged outside metal screen layer in annular groove, this loop aerial is by the dielectric transmission of electromagnetic signals at its top;
In the relay reception module, loop aerial arranged outside metal screen layer in annular groove, this loop aerial is by the dielectric receiving electromagnetic signals of its lower curtate;
In the relaying short circuit module, the arranged outside metal screen layer of the loop aerial in annular groove on the relaying amplifying circuit, this loop aerial is by the dielectric transmission of electromagnetic signals at its top; The arranged outside metal screen layer of the loop aerial in annular groove under the relaying amplifying circuit, this loop aerial sky is by the dielectric receiving electromagnetic signals of its bottom.
4. the EM-MWD transmission system of extension antenna underarm as claimed in claim 3 is characterized in that, the top of drill collar inner annular groove is arc; The bottom of the metal drill pipe short circuit inner annular groove at electromagnetic signal receiver module place is arc; The top and bottom of relaying short circuit module inner annular groove is arc.
5. as claimed in claim 1 with boring signal wireless electromagnetic transmission system; it is characterized in that; the repeat transmitted module also comprises battery; battery and radiating circuit are parallel in the annular groove is placed under the loop aerial; the output of battery links to each other with the power input of transmitter module; with the top coat of metal is set in the battery outside, battery and radiating circuit together are enclosed in the space of coat of metal and annular groove formation.
6. the EM-MWD transmission system of extension antenna underarm as claimed in claim 1 is characterized in that, described loop aerial is comprised of the soft magnetic materials of annular and the coil that is looped around outside the soft magnetic materials.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310173046.9A CN103306668B (en) | 2013-05-11 | 2013-05-11 | The EM-MWD transmission system of extension antenna underarm |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310173046.9A CN103306668B (en) | 2013-05-11 | 2013-05-11 | The EM-MWD transmission system of extension antenna underarm |
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| CN103306668B CN103306668B (en) | 2016-11-02 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573260A (en) * | 2013-10-25 | 2014-02-12 | 中国石油集团西部钻探工程有限公司 | Composite electromagnetic wave transmission and measurement while drilling device |
| CN103835664A (en) * | 2014-02-28 | 2014-06-04 | 中国地质大学（武汉） | Drill rod for wireless electromagnetic measurement-while-drilling signal transmission dipole drill string |
| CN106285648A (en) * | 2015-05-13 | 2017-01-04 | 中国石油化工股份有限公司 | The signal transmit-receive method of ground installation and the signal transmit-receive method of underground equipment |
| CN109802718A (en) * | 2017-11-14 | 2019-05-24 | 中国石油化工股份有限公司 | Electromagnetic measurement while drilling repeater and electromagnetic measurement while drilling system |
| CN112593864A (en) * | 2020-12-09 | 2021-04-02 | 电子科技大学 | Self-powered intelligent drill pipe system and underground data transmission method |
| CN115038151A (en) * | 2022-05-19 | 2022-09-09 | 电子科技大学 | Communication while drilling relay node based on self-energy supply |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003204338B1 (en) * | 2003-05-26 | 2004-05-06 | Stolarczyk, Larry G. | Radar Plow Drillstring Steering |
| US20080156534A1 (en) * | 2006-12-28 | 2008-07-03 | Brian Clark | Integrated Electrode Resistivity and EM Telemetry Tool |
| CN101525997A (en) * | 2008-03-06 | 2009-09-09 | 中国石油化工股份有限公司 | Downhole signal transmitting device for electromagnetic measurement while drilling system and transmitting method thereof |
| CN202611686U (en) * | 2012-04-27 | 2012-12-19 | 中国地质大学（武汉） | Wireless relay electromagnetic wave measurement while drilling device for coal mines |
| CN103061755A (en) * | 2011-10-19 | 2013-04-24 | 中国石油化工股份有限公司 | Short distance transmission system for wireless electromagnetic wave signals of downhole near bit and short distance transmission method |
| CN103089249A (en) * | 2013-01-09 | 2013-05-08 | 电子科技大学 | Signal wireless electromagnetism transmission system while drilling |
-
2013
- 2013-05-11 CN CN201310173046.9A patent/CN103306668B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003204338B1 (en) * | 2003-05-26 | 2004-05-06 | Stolarczyk, Larry G. | Radar Plow Drillstring Steering |
| US20080156534A1 (en) * | 2006-12-28 | 2008-07-03 | Brian Clark | Integrated Electrode Resistivity and EM Telemetry Tool |
| CN101525997A (en) * | 2008-03-06 | 2009-09-09 | 中国石油化工股份有限公司 | Downhole signal transmitting device for electromagnetic measurement while drilling system and transmitting method thereof |
| CN103061755A (en) * | 2011-10-19 | 2013-04-24 | 中国石油化工股份有限公司 | Short distance transmission system for wireless electromagnetic wave signals of downhole near bit and short distance transmission method |
| CN202611686U (en) * | 2012-04-27 | 2012-12-19 | 中国地质大学（武汉） | Wireless relay electromagnetic wave measurement while drilling device for coal mines |
| CN103089249A (en) * | 2013-01-09 | 2013-05-08 | 电子科技大学 | Signal wireless electromagnetism transmission system while drilling |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573260A (en) * | 2013-10-25 | 2014-02-12 | 中国石油集团西部钻探工程有限公司 | Composite electromagnetic wave transmission and measurement while drilling device |
| CN103573260B (en) * | 2013-10-25 | 2016-01-13 | 中国石油集团西部钻探工程有限公司 | Combined type electric magnetic wave transmission measurement-while-drilling device |
| CN103835664A (en) * | 2014-02-28 | 2014-06-04 | 中国地质大学（武汉） | Drill rod for wireless electromagnetic measurement-while-drilling signal transmission dipole drill string |
| CN103835664B (en) * | 2014-02-28 | 2015-11-04 | 中国地质大学（武汉） | A kind of drilling rod launching dipole drill string for electromagnetic wave while-drilling wireless measurement signal |
| CN106285648A (en) * | 2015-05-13 | 2017-01-04 | 中国石油化工股份有限公司 | The signal transmit-receive method of ground installation and the signal transmit-receive method of underground equipment |
| CN106285648B (en) * | 2015-05-13 | 2019-09-20 | 中国石油化工股份有限公司 | The signal transmit-receive method of ground installation and the signal transmit-receive method of underground equipment |
| CN109802718A (en) * | 2017-11-14 | 2019-05-24 | 中国石油化工股份有限公司 | Electromagnetic measurement while drilling repeater and electromagnetic measurement while drilling system |
| CN109802718B (en) * | 2017-11-14 | 2021-03-23 | 中国石油化工股份有限公司 | Electromagnetic measurement-while-drilling repeater and electromagnetic measurement-while-drilling system |
| CN112593864A (en) * | 2020-12-09 | 2021-04-02 | 电子科技大学 | Self-powered intelligent drill pipe system and underground data transmission method |
| CN115038151A (en) * | 2022-05-19 | 2022-09-09 | 电子科技大学 | Communication while drilling relay node based on self-energy supply |
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