CN104213910A - Constant current transmitting system for measurement while drilling of electromagnetic wave geosteering tool - Google Patents
Constant current transmitting system for measurement while drilling of electromagnetic wave geosteering tool Download PDFInfo
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- CN104213910A CN104213910A CN201310219485.9A CN201310219485A CN104213910A CN 104213910 A CN104213910 A CN 104213910A CN 201310219485 A CN201310219485 A CN 201310219485A CN 104213910 A CN104213910 A CN 104213910A
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Abstract
The invention provides a constant current transmitting system for measurement while drilling of an electromagnetic wave geosteering tool and belongs to the field of oil exploitation or underground mine exploration or the like. A wireless electromagnetic wave transmitting device is connected with a current detecting unit, the current detecting unit is connected with a current signal feedback unit and a transmitting antenna, and the current signal feedback unit is connected with a current control unit. The current control unit is connected with a power supply device, and the power supply device is connected with the wireless electromagnetic wave transmitting device. The constant current transmitting system can be applied to measurement while drilling of the wireless electromagnetic wave geosteering tool or other working modes with wireless electromagnetic waves used for achieving data transmission between stratums or between ore beds, and working media comprise drilling fluid, clean water, air, nitrogen and the like. A power control method for wireless electromagnetic wave data transmission has the advantages that attenuation on transmission signals by the change of resistivity of stratum and drilling media is well lowered so that the wireless electromagnetic data can be better detected on the ground.
Description
Technical field
The present invention relates to a kind of constant current emission system for measurement while drilling electromagnetic wave geosteering tool, belong to the field such as oil exploitation or mine prospection.
Background technology
Often need to use radio magnetic wave geosteering tool in petroleum drilling engineering or mine prospection, in directed drilling or horizontal drilling, underbalance well.The radio magnetic wave geosteering tool of domestic, external comparative maturity is all widely used at the scene at present.Its operating principle is: in brill instrument, placing geosteering unit, and to take drill collar as electrode launch radio magnetic wave signal to stratum with instrument, sends geologic parameter and bit location etc. with brill parameter for receiving equipment earthward.No matter these products are use powered battery or downhole generator system power supply, meeting all is without exception subject to the impact of Different Strata resistivity and drilling medium resistivity, in some formation resistivity under the low especially or extra high environment of formation resistivity, due to radio magnetic wave signal excessive attenuation, so electromagnetic wave be sent to the signal on ground will be very faint, when the minimum value that signal strength signal intensity requires lower than ground receiving system time, ground receiving system just cannot correctly identify radio magnetic wave signal, causes the failure of data demodulates.If use the current constant mode of radio magnetic wave geosteering tool to power, this impact can be avoided preferably.
For radio magnetic wave geosteering tool, application number is 3,967, the U.S. patent Nos of 201, denomination of invention: Wireless subterranean signaling method.Application number is also had to be 7,477, the U.S. patent Nos of 162, denomination of invention: Wireless electromagnetic telemetry system and method for bottomhole assembly tool construction proposes how to launch low-frequency wireless electromagnetic wave in the earth formation and could set up electromagnetic signal channel, do not specifically describe and how go to realize from the angle of circuit and overcoming Different Strata and different drilling medium situation, what impact is the result of electromagnetic decay on ground receiver have.
The existing radio magnetic wave measurement while drilling instrument generally used, also be all rely on the maximum natural discharge current of battery to power, when not considering that employing generating power downhole system realizes high-power power supply, the current overload how avoiding Different Strata resistivity to affect or the phenomenon of ultralight year.
Summary of the invention
The object of the invention is the defect for above-mentioned prior art, provide a kind of constant current-supplying mode of the radio magnetic wave geosteering tool for measurement while drilling, not only can realize the efficiency utilization of electric energy, can to the receiving intensity of wireless electromagnetic wave datum, can better suppress different resistivity stratum and different resistivity working media to the decay of radio magnetic wave signal by surface detection system intentinonally simultaneously.
The technical scheme that the present invention takes to achieve these goals is:
A kind of constant current output system of the radio magnetic wave geosteering tool for measurement while drilling, wireless electromagnetic wave transmitting device connects current detecting unit, current detecting unit connects current signal feedback unit and transmitting antenna, and current signal feedback unit connects current control unit; Current control unit connects supply unit, and supply unit connects wireless electromagnetic wave transmitting device,
Described current detecting unit is placed between wireless electromagnetic wave transmitting device and transmitting antenna, for detecting electromagnetic radiation electric current;
Described current signal feedback unit is placed between current detecting unit and current control unit, for the size to current control unit feedback emission current;
Described current control unit is placed between current feedback unit and supply unit, is that wireless electromagnetic wave transmitting circuit supplies constant current value for controlling supply unit;
Described current detecting unit keeps constant current-supplying in order to detect radio magnetic wave emission current for controlling supply unit;
Described current feedback unit can by the current signal detected by the mode of isolating or do not isolate, amplify or do not amplify, modulate or do not modulate, be input in current control unit, power supply is kept to export the reference frame of constant current for current control unit, the component of this current feedback unit all should adopt high temperature or superhigh temperature electronic component, by simulation or digital circuit corresponding function, for down-hole high-temperature work environment;
Described current control unit is according to the signal of current feedback unit, control supply unit and export constant current value, to ensure that different resistivity stratum, down-hole and different resistivity working media are on the impact of wireless electromagnetic wave attenuation, for brill geosteering tool.
The invention has the beneficial effects as follows: the efficient transmission that can realize radio magnetic wave electric energy, different resistivity stratum and different resistivity drilling medium can be suppressed preferably to the decay of radio magnetic wave signal simultaneously, realize supply unit and can drive wireless electromagnetic wave launcher with larger fan-out capability, thus in ground receiving system, obtain good reception.Simultaneously, the electronic original part of each several part all adopts high temperature, superhigh temperature grade, is suitable for the job requirement of measurement while drilling instrument in drilling engineering completely, eliminates because different resistivity stratum or different resistivity drilling medium affect generating power downhole system works in shortcoming that is more inefficient or current overload.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by referring to detailed description below, more completely can understand the present invention better and easily learn wherein many adjoint advantages, but accompanying drawing described herein is used to provide a further understanding of the present invention, form a part of the present invention, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention, as schemed wherein:
Fig. 1 is connection diagram of the present invention.
Below in conjunction with drawings and Examples, the present invention is further described.
Detailed description of the invention
Embodiment 1: as shown in Figure 1, a kind of constant current emission system for measurement while drilling electromagnetic wave geosteering tool, wireless electromagnetic wave transmitting device 2 connects current detecting unit 3, current detecting unit 3 connects current signal feedback unit 6 and transmitting antenna 4, and current signal feedback unit 6 connects current control unit 5; Current control unit 5 connects supply unit 1, and supply unit 1 connects wireless electromagnetic wave transmitting device 2,
Described current detecting unit 3 is placed between wireless electromagnetic wave transmitting device 2 and transmitting antenna 4, for detecting electromagnetic radiation electric current;
Described current signal feedback unit 6 is placed between current detecting unit 3 and current control unit 5, for feeding back the size of emission current to current control unit 5;
Described current control unit 5 is placed between current feedback unit 6 and supply unit 1, is that wireless electromagnetic wave transmitting circuit supplies constant current value for controlling supply unit;
Described current detecting unit 3 keeps constant current-supplying in order to detect radio magnetic wave emission current for controlling supply unit; The material of concrete use is the metal of applicable down-hole high-temperature work environment or alloy or other are for detecting the high temperature of electric current, superhigh temperature electronic devices and components or material;
Described current feedback unit 6 can by the current signal detected by the mode of isolating or do not isolate, amplify or do not amplify, modulate or do not modulate, be input in current control unit 5, power supply is kept to export the reference frame of constant current for current control unit, the component of this current feedback unit all should adopt high temperature or superhigh temperature electronic component, by simulation or digital circuit corresponding function, for down-hole high-temperature work environment;
Described current control unit 5 is according to the signal of current feedback unit 6, control supply unit and export constant current value, to ensure that different resistivity stratum, down-hole and different resistivity working media are on the impact of wireless electromagnetic wave attenuation, for brill geosteering tool.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the constant current output system for the radio magnetic wave geosteering tool of measurement while drilling, it is characterized in that, wireless electromagnetic wave transmitting device connects current detecting unit, current detecting unit connects current signal feedback unit and transmitting antenna, and current signal feedback unit connects current control unit; Current control unit connects supply unit, and supply unit connects wireless electromagnetic wave transmitting device,
Described current detecting unit is placed between wireless electromagnetic wave transmitting device and transmitting antenna, for detecting electromagnetic radiation electric current;
Described current signal feedback unit is placed between current detecting unit and current control unit, for the size to current control unit feedback emission current;
Described current control unit is placed between current feedback unit and supply unit, is that wireless electromagnetic wave transmitting circuit supplies constant current value for controlling supply unit;
Described current detecting unit keeps constant current-supplying in order to detect radio magnetic wave emission current for controlling supply unit;
Described current feedback unit can by the current signal detected by the mode of isolating or do not isolate, amplify or do not amplify, modulate or do not modulate, be input in current control unit, power supply is kept to export the reference frame of constant current for current control unit, the component of this current feedback unit all should adopt high temperature or superhigh temperature electronic component, by simulation or digital circuit corresponding function, for down-hole high-temperature work environment;
Described current control unit is according to the signal of current feedback unit, control supply unit and export constant current value, to ensure that different resistivity stratum, down-hole and different resistivity working media are on the impact of wireless electromagnetic wave attenuation, for brill geosteering tool.
2. the constant current output system of the radio magnetic wave geosteering tool for measurement while drilling according to claim 1, is characterized in that, the stratum of different resistivity and working media all adopt constant current outwards to launch radio magnetic wave.
3. the constant current output system of the radio magnetic wave geosteering tool for measurement while drilling according to claim 2, is characterized in that: launching radio magnetic wave with constant current is constantly.
4. the constant current output system of the radio magnetic wave geosteering tool for measurement while drilling according to claim 2, is characterized in that: described constant-current source output current not with formation resistivity change and working media change in resistance and change.
5. the constant current output system of the radio magnetic wave geosteering tool of measurement while drilling according to claim 4, is characterized in that: constant current is self-adjusting by Circuits System.
6. the constant current output system of the radio magnetic wave geosteering tool of measurement while drilling according to claim 5, is characterized in that: supply unit is a power supply exporting constant current.
7. the constant current output system of the radio magnetic wave geosteering tool for measurement while drilling according to claim 1, is characterized in that, can be applicable to the drilling medium of different resistivity stratum and different resistivity.
8. the constant current output system of the radio magnetic wave geosteering tool for measurement while drilling according to claim 7 can be applied and comprise drilling fluid, clear water, air, nitrogen with the drilling medium of different resistivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310219485.9A CN104213910A (en) | 2013-06-05 | 2013-06-05 | Constant current transmitting system for measurement while drilling of electromagnetic wave geosteering tool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310219485.9A CN104213910A (en) | 2013-06-05 | 2013-06-05 | Constant current transmitting system for measurement while drilling of electromagnetic wave geosteering tool |
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| CN104213910A true CN104213910A (en) | 2014-12-17 |
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| CN201310219485.9A Pending CN104213910A (en) | 2013-06-05 | 2013-06-05 | Constant current transmitting system for measurement while drilling of electromagnetic wave geosteering tool |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344821A (en) * | 2018-04-08 | 2019-10-18 | 中国石油化工股份有限公司 | A kind of downhole drill communication means and system |
| CN113027356A (en) * | 2021-03-30 | 2021-06-25 | 中原工学院 | Underground mining measurement-while-drilling wireless transmission drill rod and application thereof |
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|---|---|---|---|---|
| US3967201A (en) * | 1974-01-25 | 1976-06-29 | Develco, Inc. | Wireless subterranean signaling method |
| 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 |
| CN202023558U (en) * | 2011-02-12 | 2011-11-02 | 北京六合伟业科技有限公司 | Low-frequency magnetic communication device |
| CN202075425U (en) * | 2011-02-23 | 2011-12-14 | 北京南风科创应用技术有限公司 | Multifunctional transmitter |
| US20120067644A1 (en) * | 2008-12-10 | 2012-03-22 | Jaideva Goswami | Method and Apparatus for Directional Well Logging |
| US20120179372A1 (en) * | 2010-07-22 | 2012-07-12 | Alexander Edward Kalish | Collecting Control Source Electromagnetic Signals |
| CN103089249A (en) * | 2013-01-09 | 2013-05-08 | 电子科技大学 | Signal wireless electromagnetism transmission system while drilling |
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2013
- 2013-06-05 CN CN201310219485.9A patent/CN104213910A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3967201A (en) * | 1974-01-25 | 1976-06-29 | Develco, Inc. | Wireless subterranean signaling method |
| 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 |
| US20120067644A1 (en) * | 2008-12-10 | 2012-03-22 | Jaideva Goswami | Method and Apparatus for Directional Well Logging |
| US20120179372A1 (en) * | 2010-07-22 | 2012-07-12 | Alexander Edward Kalish | Collecting Control Source Electromagnetic Signals |
| CN202023558U (en) * | 2011-02-12 | 2011-11-02 | 北京六合伟业科技有限公司 | Low-frequency magnetic communication device |
| CN202075425U (en) * | 2011-02-23 | 2011-12-14 | 北京南风科创应用技术有限公司 | Multifunctional transmitter |
| CN103089249A (en) * | 2013-01-09 | 2013-05-08 | 电子科技大学 | Signal wireless electromagnetism transmission system while drilling |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344821A (en) * | 2018-04-08 | 2019-10-18 | 中国石油化工股份有限公司 | A kind of downhole drill communication means and system |
| CN113027356A (en) * | 2021-03-30 | 2021-06-25 | 中原工学院 | Underground mining measurement-while-drilling wireless transmission drill rod and application thereof |
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Application publication date: 20141217 |