CN100410488C - Radio electromagnetic short transmission method and system - Google Patents
Radio electromagnetic short transmission method and system Download PDFInfo
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- CN100410488C CN100410488C CNB2004100042759A CN200410004275A CN100410488C CN 100410488 C CN100410488 C CN 100410488C CN B2004100042759 A CNB2004100042759 A CN B2004100042759A CN 200410004275 A CN200410004275 A CN 200410004275A CN 100410488 C CN100410488 C CN 100410488C
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Abstract
The present invention provides a radio electromagnetic short transmission method and a system thereof. The system is composed of a wireless electromagnetic communication signal generator with transmitting antennas and a wireless electromagnetic communication receiver with receiving antennas, wherein the wireless electromagnetic communication signal generator with transmitting antennas makes data collected by the sensor modulated; accordingly, electromagnetic signals are generated, and the electromagnetic signals are transmitted and output; the wireless electromagnetic communication receiver with receiving antennas receives the electromagnetic signals which are transmitted and output; the received electromagnetic signals are demodulated, and the demodulated data are transferred to a mud pulse generator. In a geology guidance system or other measuring tools while drilling, the sensor which is close to the position of a drilling head can make the collected data transmitted to the mud pulse generator (MWD), and the system is free from the divided influence of the mud motor between the sensor and the mud pulse generator.
Description
Technical field
The present invention relates to be used for borehole instruments and equipment such as oil, mine, geological prospecting, it is particularly related to geosteering system and measurement while drilling instrument, is a kind of wireless electromagnetic short pass device concretely.
Background technology
Current at oil, the mine, for wellbore trace is crept into according to the engineering design requirement more accurately, and grasp formation information more promptly and accurately just need be installed in position near drill bit to orientation sensor and the sensor of gathering geological information in the drilling engineerings such as geological prospecting.But when MTR (helicoid hydraulic motor) is arranged in the drilling assembly, promptly be applied in when sliding the brill mode, these nearly bit sensors will be separated by MTR with the mud pulse generator (MWD) of transmission data.And lead can not pass MTR, so the information of sensor acquisition can't send MWD to.So the information transmission problem that how to solve between sensor and the MWD is put in face of people.
Summary of the invention
The objective of the invention is to, a kind of wireless electromagnetic short pass device is provided, make in the geosteering system, or in the instrument of other measurement while drilling, can send the data of gathering to mud pulse generator (MWD) near the sensor of bit location, and be not subjected to the influence that separated by MTR between sensor and the mud pulse generator.
Technical scheme of the present invention is: this a kind of wireless electromagnetic short pass method with sensor acquisition to data modulate, generate electromagnetic signal, and with this electromagnetic signal emission output; Reception is launched the electromagnetic signal of output, and the electromagnetic signal that receives is carried out demodulation, and the data after the demodulation are passed to mud pulse generator.
This wireless electromagnetic short pass method comprises following concrete steps: with sensor acquisition to data be modulated into fsk signal; Described fsk signal is carried out power amplification; Signal after the power amplification is arrived electromagnetic signal channel through transmission antennas transmit; Adopt reception antenna from described electromagnetic signal channel receiving electromagnetic signals; The electromagnetic signal that receives is carried out signal amplifies; Signal after amplifying is carried out filtering, demodulation, detection, shaping, and extract data; The data that extract are passed to described mud pulse generator.This wireless electromagnetic short pass method adopt the wireless electromagnetic short pass signal generator that is loaded with transmitting antenna with sensor acquisition to data modulate, generate electromagnetic signal, and with this electromagnetic signal emission output; The wireless electromagnetic short pass receiver that employing is loaded with reception antenna receives the electromagnetic signal that is launched output, and the electromagnetic signal that receives is carried out demodulation, and the data after the demodulation are passed to mud pulse generator; Wherein: in drill string, produce induced-current by the mode of the wireless electromagnetic short pass signal generator that is loaded with transmitting antenna by electromagnetic induction; Constitute current path by drill string mud, stratum, form the channel of transmission signal; Obtain the signal code that sends by the wireless electromagnetic short pass signal generator that is loaded with transmitting antenna by the wireless electromagnetic short pass receiver that is loaded with reception antenna that is positioned at the MTR top with way of electromagnetic induction then, finish the information transmission between sensor and the mud pulse generator.
Described with sensor acquisition to data be modulated into fsk signal and be meant: the data sent here of receiving sensor at first, use certain two frequency between the 1KHZ-100KHZ as carrier frequency then, data are modulated into fsk signal.
For achieving the above object, the invention provides a kind of wireless electromagnetic short pass device, it is characterized in that comprising: be loaded with transmitting antenna wireless electromagnetic short pass signal generator, be loaded with the wireless electromagnetic short pass receiver of reception antenna; Wherein,
The described wireless electromagnetic short pass signal generator that is loaded with transmitting antenna: with described sensor acquisition to data modulate, generate electromagnetic signal, and with this electromagnetic signal emission output;
The described wireless electromagnetic short pass receiver that is loaded with reception antenna: receive the electromagnetic signal that is launched output, and the electromagnetic signal that receives is carried out demodulation, the data after the demodulation are passed to described mud pulse generator.
The described wireless electromagnetic short pass signal generator that is loaded with transmitting antenna comprises: data-interface, data modulated carriers unit, power amplifier, transmitting antenna;
The described wireless electromagnetic short pass receiver that is loaded with reception antenna comprises: reception antenna, signal amplifier, signal processor, data output interface;
Described sensor is the sensor pipe nipple;
Wherein:
The data that data-interface receiving sensor pipe nipple is sent here, again by data modulated carriers unit with the data of sensor pipe nipple with certain two frequency between the 1KHZ-100KHZ as carrier frequency, data are modulated into fsk signal, fsk signal after the modulation is given power amplifier, signal sends transmitting antenna to after power amplification, transmitting antenna sends signal; The signal of launching picks up electromagnetic signal by reception antenna, and gives signal amplifier signal by the reception antenna of electromagnetic signal channel arrival MTR top, and the signal after the amplification is process filtering in signal processor, demodulation, and detection, shaping extracts data; The data of extracting send mud pulse generator to through data output interface.
The functional circuit of described data-interface, data modulated carriers unit, power amplifier is integrated in the circuit bag, and is installed in the warehouse of the wireless electromagnetic short pass signal generator pipe nipple that is loaded with transmitting antenna, is connected to transmitting antenna by cable; Transmitting antenna is a ring bodies of being made by soft magnetic materials, is wound with lead on this ring, and the line end of lead links to each other with the cable of the circuit bag of data-interface, data modulated carriers unit, power amplifier composition;
In the transmitting antenna outside reception antenna and transmitting antenna oversheath are installed, at reception antenna and the axial two ends of transmitting antenna oversheath one dead ring are housed respectively, the material of dead ring is glass fiber reinforced plastic or polytetrafluoroethylene (PTFE) or pottery;
One circuit bag is installed in the warehouse of the wireless electromagnetic short pass receiver pipe nipple that is loaded with reception antenna above MTR, be integrated with each functional circuit such as signal amplifier, signal processor, data output interface in this circuit bag, and be connected on the reception antenna by cable, reception antenna is a ring bodies of being made by soft magnetic materials, be wound with lead on this ring, the line end of lead links to each other with the cable of the integrated circuit bag of signal amplifier, signal processor, data output interface;
Reception antenna and transmitting antenna oversheath are installed in the outside of reception antenna;
At reception antenna and the axial two ends of transmitting antenna oversheath one dead ring is housed respectively, the material of dead ring is glass fiber reinforced plastic or polytetrafluoroethylene (PTFE) or pottery.
Beneficial effect of the present invention is, by a kind of wireless electromagnetic short pass device is provided, make in the geosteering system, or in other measurement while drilling instrument, can send the data of gathering to mud pulse generator (MWD) near the sensor of bit location, and be not subjected to the influence that separated by MTR between sensor and the mud pulse generator.
Description of drawings
Fig. 1 is the schematic diagram of the inventive method;
Fig. 2 is the block diagram of apparatus of the present invention;
Fig. 3 is apparatus of the present invention structural representation.
Drawing reference numeral:
Mud pulse generator (MWD) 1, wireless electromagnetic short pass receiver 2, electromagnetic signal channel 3, MTR 4, wireless electromagnetic short pass signal generator 5, sensor pipe nipple 6, stratum 7, drill bit 8, drill string 9, mud 10, data-interface 11, data modulated carriers unit 12, power amplifier 13, transmitting antenna 14, data output interface 15, signal processor 16, signal amplifier 17, reception antenna 18, reception antenna and transmitting antenna oversheath 20.
The specific embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention:
The present invention mainly comprises " method of wireless electromagnetic short-distance transmission " and " system that realizes this method constitutes ".In the geosteering system, or in the instrument of other measurement while drilling because some sensor is placed on the position near drill bit, make these sensors and mud pulse generator (MWD) be separated by MTR, the data of sensor acquisition can't be passed to MWD.The present invention proposes " method of wireless electromagnetic short-distance transmission " in order to address this problem, by sensor acquisition to the data electromagnetic signal that is modulated into a certain frequency be transmitted into the top of MTR, come out to pass to MWD by a receiver receiving electromagnetic signals and with data demodulates then.
The description of wireless electromagnetic short-distance transmission method among the present invention:
As can be seen from Figure 1 in drill string 9, produce induced-current by the mode of wireless electromagnetic short pass signal generator 5 by electromagnetic induction.By drill string 9, mud 10, stratum 7 constitutes the channel that current path forms the transmission signal.Obtain the signal code that sends by wireless electromagnetic short pass signal generator 5 by the wireless electromagnetic short pass receiver 2 that is positioned at the MTR top with way of electromagnetic induction then, finish the information transmission between sensor pipe nipple 6 and the mud pulse generator (MWD) 1.
The description of wireless electromagnetic short pass systemic-function and system architecture among the present invention:
In conjunction with Fig. 2 wireless electromagnetic short pass systemic-function is described: data of sending here by data-interface 11 receiving sensor pipe nipples 6 at first, again by data modulated carriers unit 12 parts with sensing data with certain two frequency between " 1KHZ-100KHZ " as carrier frequency, data are modulated into " FSK " signal.Fsk signal after the modulation gives power amplifier 13 parts, and signal sends transmitting antenna 14 to after power amplification, and transmitting antenna sends signal.The signal of launching arrives the wireless electromagnetic short pass receiver 2 of MTR 4 tops by electromagnetic signal channel.By the reception antenna in this part 18.
Pick up electromagnetic signal, and give signal signal amplifier 17 circuit, the signal after the amplification is process filtering in signal processor 16 parts, demodulation, and detection, shaping extracts data.The data of extracting send mud pulse generator (MWD) 1 to through data output interface 15 circuit.
Fig. 3 has described the general configuration of wireless electromagnetic short pass system, and data-interface 11 in Fig. 3; Data modulated carriers unit 12; Power amplifier 13 functional circuits such as each several part such as grade are integrated in the circuit bag, are installed in the warehouse of wireless electromagnetic short pass signal generator and transmitting antenna pipe nipple, are connected to transmitting antenna 14 by cable.Transmitting antenna 14 is ring bodies of being made by soft magnetic materials, is wound with lead, the line end of lead and data-interface 11 on this ring; Data modulated carriers unit 12; The cable of power amplifier 13 circuit bags links to each other.In transmitting antenna 14 outsides reception antenna and transmitting antenna oversheath 20 are installed.At reception antenna and transmitting antenna oversheath 20 axial two ends one dead ring is housed respectively, the material of dead ring is glass fiber reinforced plastic or polytetrafluoroethylene (PTFE) or pottery etc.
Beneficial effect of the present invention is, by a kind of wireless electromagnetic short pass device is provided, make in the geosteering system, or in the instrument of other measurement while drilling, can send the data of gathering to mud pulse generator (MWD) near the sensor of bit location, and be not subjected to the influence that separated by MTR between sensor and the mud pulse generator.
The above specific embodiment only is used to the present invention is described but not is used to limit the present invention.
Claims (5)
1. wireless electromagnetic short pass device is characterized in that comprising: be loaded with transmitting antenna wireless electromagnetic short pass signal generator, be loaded with the wireless electromagnetic short pass receiver of reception antenna; Wherein,
The described wireless electromagnetic short pass signal generator that is loaded with transmitting antenna (14): with sensor acquisition to data modulate, generate electromagnetic signal, and with this electromagnetic signal emission output;
The described wireless electromagnetic short pass receiver that is loaded with reception antenna (18): receive the electromagnetic signal that is launched output, and the electromagnetic signal that receives is carried out demodulation, the data after the demodulation are passed to described mud pulse generator; Wherein,
Transmitting antenna (14) respectively is equipped with a dead ring with the reception antenna of reception antenna (18) and the axial two ends of transmitting antenna oversheath (20).
2. device according to claim 1 is characterized in that, the described wireless electromagnetic short pass signal generator that is loaded with transmitting antenna comprises: data-interface, data modulated carriers unit, power amplifier.
3. device according to claim 1 is characterized in that, the described wireless electromagnetic short pass receiver that is loaded with reception antenna comprises: signal amplifier, signal processor, data output interface.
4. device according to claim 1 is characterized in that, the described wireless electromagnetic short pass signal generator that is loaded with transmitting antenna comprises: data-interface (11), data modulated carriers unit (12), power amplifier (13), transmitting antenna (14);
The described wireless electromagnetic short pass receiver that is loaded with reception antenna comprises: reception antenna (18), signal amplifier (17), signal processor (16), data output interface (15);
Described sensor is sensor pipe nipple (6);
Wherein:
The data that data-interface (11) receiving sensor pipe nipple (6) is sent here, again by data modulated carriers unit (12) with the data of sensor pipe nipple (6) with certain two frequency between the 1KHZ-100KHZ as carrier frequency, data are modulated into fsk signal, fsk signal after the modulation is given power amplifier (13), signal sends transmitting antenna (14) to after power amplification, transmitting antenna (14) sends signal; The signal of launching arrives the reception antenna (18) of MTR (4) top by electromagnetic signal channel (3), pick up electromagnetic signal by reception antenna (18), and give signal amplifier (17) signal, signal after the amplification is process filtering in signal processor (16), demodulation, detection, shaping extracts data; The data of extracting send mud pulse generator (1) to through data output interface (15).
5. device according to claim 4, it is characterized in that, the functional circuit of described data-interface (11), data modulated carriers unit (12), power amplifier (13) is integrated in the circuit bag, and be installed in the warehouse of wireless electromagnetic short pass signal generator (5) pipe nipple that is loaded with transmitting antenna, be connected to transmitting antenna (14) by cable; Transmitting antenna (14) is a ring bodies of being made by soft magnetic materials, is wound with lead on this ring, and the line end of lead links to each other with the cable of the circuit bag of data-interface (11), data modulated carriers unit (12), power amplifier (13) composition;
Signal amplifier (17) in wireless electromagnetic short pass receiver (2) pipe nipple that is loaded with reception antenna of MTR (4) top, signal processor (16), the functional circuit of data output interface (15) is integrated in the circuit bag, and be installed in the warehouse of wireless electromagnetic short pass receiver (2) pipe nipple that is loaded with reception antenna, and be connected on the reception antenna (18) by cable, reception antenna (18) is a ring bodies of being made by soft magnetic materials, on this ring, be wound with lead, the line end of lead and signal amplifier (17), signal processor (16), the cable of the integrated circuit bag of data output interface (15) links to each other;
Reception antenna and transmitting antenna oversheath (20) are installed in the outside of reception antenna (18);
Wherein, the material of dead ring is glass fiber reinforced plastic or polytetrafluoroethylene (PTFE) or pottery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100042759A CN100410488C (en) | 2004-02-16 | 2004-02-16 | Radio electromagnetic short transmission method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100042759A CN100410488C (en) | 2004-02-16 | 2004-02-16 | Radio electromagnetic short transmission method and system |
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| CN100410488C true CN100410488C (en) | 2008-08-13 |
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| CNB2004100042759A Expired - Fee Related CN100410488C (en) | 2004-02-16 | 2004-02-16 | Radio electromagnetic short transmission method and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106761712A (en) * | 2016-12-28 | 2017-05-31 | 山东大学 | Downhole wireless electromagnetism short pass method and system based on MSK modulation |
| US10975689B1 (en) | 2019-09-18 | 2021-04-13 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Near bit wireless constant current short distance transmission method and device |
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| US7477162B2 (en) * | 2005-10-11 | 2009-01-13 | Schlumberger Technology Corporation | Wireless electromagnetic telemetry system and method for bottomhole assembly |
| CN101525997B (en) * | 2008-03-06 | 2012-10-17 | 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 |
| CN101525998B (en) * | 2008-03-06 | 2012-09-05 | 中国石油化工股份有限公司 | Ground signal receiving device for electromagnetic measurement while drilling system and receiving method thereof |
| CN101289935B (en) * | 2008-06-11 | 2012-02-08 | 中国石油集团钻井工程技术研究院 | Near-bit geological guiding probe system |
| GB2472155B (en) * | 2008-12-16 | 2013-12-18 | Halliburton Energy Serv Inc | Azimuthal at-bit resistivity and geosteering methods and systems |
| CN103061755B (en) * | 2011-10-19 | 2016-01-13 | 中国石油化工股份有限公司 | A kind of down-hole nearly drill bit radio magnetic wave signal short-distance transmission system and method |
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| CN102937022B (en) * | 2012-11-14 | 2015-07-15 | 中国石油大学(北京) | System, device and method for transmitting near-bit drilling signals |
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| CN103089249B (en) * | 2013-01-09 | 2015-07-15 | 电子科技大学 | Signal wireless electromagnetism transmission system while drilling |
| WO2015192226A1 (en) * | 2014-06-18 | 2015-12-23 | Evolution Engineering Inc. | Measuring while drilling systems, method and apparatus |
| CN106499386B (en) * | 2016-12-16 | 2019-12-24 | 北京科技大学 | Near-bit well logging system and method based on coupling communication |
| CN108678734A (en) * | 2018-06-01 | 2018-10-19 | 北京六合伟业科技股份有限公司 | A kind of nearly drill bit measuring device that the scope of application is big |
| CN113482606B (en) * | 2021-05-14 | 2023-09-22 | 西南石油大学 | Underground signal receiving and transmitting device |
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