CN206920623U - A kind of antenna fast switching system for NMR while drilling - Google Patents
A kind of antenna fast switching system for NMR while drilling Download PDFInfo
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- CN206920623U CN206920623U CN201720873240.1U CN201720873240U CN206920623U CN 206920623 U CN206920623 U CN 206920623U CN 201720873240 U CN201720873240 U CN 201720873240U CN 206920623 U CN206920623 U CN 206920623U
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Abstract
A kind of antenna fast switching system for NMR while drilling is the utility model is related to, including：Master control sequence circuit, radiating circuit, fast switch circuit, host computer and antenna probes；Master control sequence circuit is connected with the radiating circuit, fast switch circuit and host computer, receives the manipulation signal that host computer is sent, and transmits signals to radiating circuit, and transmission receives signal to fast switch circuit；Radiating circuit is connected with the antenna probes, to antenna probes emission current；Antenna probes, as transmitting coil exciting to the hydrogen-rich materials around probe, NMR signal are received as reception antenna to launch the coil integrated with reception；Fast switch circuit is connected with the antenna probes, the switching that the antenna probes are launched and received.The complete pair signals transmitting of the antenna fast switching system of the advantages of the utility model and the switching received, while meet the needs of underground oil exploration, and also it is convenient and safe.
Description
Technical field
The utility model belongs to nuclear magnetic resonance technique field, and in particular to a kind of antenna for NMR while drilling
Fast switching system.
Background technology
Nuclear magnetic resonance is the geophysical method for being uniquely capable of direct detection Hydrogen Proton so far, and nuclear magnetic resonance log is
A kind of new Logging Technology suitable for open hole well, be it is currently the only can with any lithology reservoir free fluid of direct measurement (oil,
Gas and water) seepage flow bulk properties logging method, there is obvious superiority.
NMR logging instrument is generally made up of ground control system and underground survey system, and wherein measuring system is placed in spy
Head is internal.The reception and transmitting of usual logging instrument use same coil, and NMR signal is little weak signal, typically nV
Rank, in order to obtain high s/n ratio, high-resolution signal, it is necessary to develop the system that a set of antenna is switched fast.And oil reservoir leads to
Hundreds of meters of underground is frequently located in several kms, with the intensification of underground distance, temperature, pressure also raise immediately, therefore design quick
Switching system is also contemplated that using high temperature resistant device.
Existing magnetic resonance tool uses electromagnetic relay more, solid-state relay, light coupling relay, but electromagnetic relay
Switch speed is slow, and solid-state relay volume is big, and temperature is low, poor anti jamming capability, and light coupling relay temperature is low, is all not suitable for applying
In well logging environment.
Utility model content
The antenna-switching device used to solve existing magnetic resonance tool is difficult to the present situation for meeting underground oil exploration demand,
The utility model provides a kind of antenna fast switching system for NMR while drilling；The antenna fast switching system is complete
Pair signals launch the switching with receiving.
The purpose of this utility model is achieved through the following technical solutions：
A kind of antenna fast switching system for NMR while drilling, including：Master control sequence circuit, transmitting electricity
Road, fast switch circuit, host computer and antenna probes；Wherein：
Master control sequence circuit, it is connected with the radiating circuit, fast switch circuit and host computer, receives what host computer was sent
Signal is manipulated, transmits signals to radiating circuit, transmission receives signal to fast switch circuit；
Radiating circuit, it is connected with the antenna probes, to antenna probes emission current；
Antenna probes, to launch the coil integrated with receiving, as transmitting coil to the hydrogen-rich materials around probe
Excite, NMR signal is received as reception antenna；
Fast switch circuit, it is connected with the antenna probes, the switching that the antenna probes are launched and received.
Further, the antenna fast switching system for NMR while drilling also includes and fast switch circuit
The low noise of connection is with harmonious preceding electric discharge road, and the acquisition process being connected with the low noise with harmonious preceding electric discharge road and storage
Circuit, for the NMR signal after low noise is with harmonious preceding electric discharge road advance signal processing, acquired processing and storage are electric
Road reaches the host computer being connected with the output end of the acquisition process and storage circuit and is shown and stored.
Further, the fast switch circuit includes isolated drive circuit and two high-voltage MOS pipes, the isolation drive electricity
Road provides corresponding reference voltage for two high-voltage MOS pipes, and antenna probes are connected by the output end of the high-voltage MOS pipe.
Further, the isolated drive circuit includes two DC-DC power modules, optocoupler and driving chip, two DC-
DC power module is all connected with optocoupler and driving chip, and the master control sequence circuit sends signal and sends driving core to by optocoupler
Piece, driving chip are exported using two-way and control two high-voltage MOS pipes respectively, judge that antenna probes carry out transmission signal or carry out letter
Number collection.
Further, the model IXDD409 chips that the driving chip uses.
Further, the optocoupler uses high temperature resistant optocoupler, the model TPL2301 of high temperature resistant optocoupler.
Compared with prior art, beneficial effect is the utility model：
The utility model makes fast switch circuit by oneself by high temperature resistant optocoupler, insulating power supply, high temperature resistant driving chip and high pressure
Metal-oxide-semiconductor is formed, and system low-voltage control section and high drive executable portion are isolated, and avoids driving the forceful electric power of executable portion
Disturb the weak signal in control loop.
The utility model not only avoids the input and output of drive circuit from using same ground terminal using isolation drive design, produces
Interfere, artificial on-line debugging can also be made from directly contact high-tension circuit, so as to more convenient, safety.
A kind of antenna fast switching system for NMR while drilling of the utility model, it is a kind of high temperature high voltage resistant
Antenna fast switching system, be made of high temperature resistant device, and high s/n ratio, high-resolution signal can be obtained.
Brief description of the drawings
Fig. 1 is the entire block diagram for the antenna fast switching system that the utility model is used for NMR while drilling.
Fig. 2 is the internal frame diagram of the utility model fast switch circuit.
1 in figure, master control sequence circuit, 2, radiating circuit, 3, fast switch circuit, 4, low noise with electric discharge road before harmonious,
5th, acquisition process and storage circuit, 6, host computer, 7, antenna probes, 8, DC-DC power module I, 9, DC-DC power module II,
10th, optocoupler, 11, driving chip, 12 high-voltage MOS pipes.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
Referring to Fig. 1, a kind of antenna fast switching system for NMR while drilling, including master control sequence circuit 1,
Radiating circuit 2, fast switch circuit 3, host computer 6, antenna probes 7, low noise with electric discharge road 4 and acquisition process before harmonious and
Storage circuit 5；Master control sequence circuit 1 is connected with the radiating circuit 2, fast switch circuit 3 and host computer 6, receives host computer 6
The manipulation signal sent, transmits signals to radiating circuit 2, and transmission receives signal to fast switch circuit 3；Radiating circuit 2
It is connected with the antenna probes 7, to the emission current of antenna probes 7；Antenna probes 7 are made to launch the coil integrated with reception
For transmitting coil exciting to the hydrogen-rich materials around probe, NMR signal is received as reception antenna；It is switched fast electricity
Road 3 is connected with the antenna probes 7, the switching that the antenna probes 7 are launched and received；Fast switch circuit 3 also connects
Low noise is connect with harmonious preceding electric discharge road 4, low noise is with harmonious preceding electric discharge road 4 connection acquisition process and storage circuit 5, nuclear magnetic resonance
After low noise is with the harmonious preceding electric discharge advance signal of road 4 processing, acquired processing and storage circuit 5 reach and the collection signal
The host computer 6 of the output end of processing and storage circuit 5 connection is shown and stored.
Referring to Fig. 2, fast switch circuit 3 includes isolated drive circuit and two high-voltage MOS pipes 12, isolated drive circuit are
Two high-voltage MOS pipes 12 provide corresponding reference voltage, and realize rapidly and accurately switching transmitting and the purpose of reception antenna, and two
Individual high-voltage MOS pipe 12 is managed using two high pressure N-MOS, and antenna probes 7 are connected by the output end of two high-voltage MOS pipes 12；Every
Include two DC-DC power modules, optocoupler 10 and driving chip 11 from drive circuit, the utility model optocoupler 10 is from special
High temperature resistant optocoupler TPL2301, driving chip 11 select IXDD409 chips, and two DC-DC power modules are respectively DC-DC power source
Module I 8 and DC-DC power module II 9；Two DC-DC power modules are all connected with optocoupler 10 and driving chip 11, master control sequential electricity
Road 1 sends signal and sends driving chip 11 to by optocoupler 10, and driving chip 11 is exported using two-way and controls two high pressures respectively
Metal-oxide-semiconductor 12, judge that antenna probes 7 carry out transmission signal or carry out signal acquisition.
DC-DC power module I 8, DC-DC power module II 9, high temperature resistant optocoupler TPL2301 and driving chip IXDD409
Form isolated drive circuit, system launch and receive the conversion stage, first master control system send order carry out signal transmitting or
Receive, signal sends driving chip IXDD409 to by high temperature resistant optocoupler TPL2301, because high temperature resistant optocoupler TPL2301 is inputted
End fully achieves electrical isolation with output end, so output signal is steady without influence, strong antijamming capability, work on input
It is fixed, contactless, service life length, efficiency of transmission height.Meanwhile downhole temperature is very high, meanwhile, plus resistant to elevated temperatures anti-outside system
Magnetic protective cover.Secondly driving chip IXDD409 receives the signal of high temperature resistant optocoupler TPL2301 transmission, and high pressure N-MOS pipes are entered
Row control, the output of its two-way control two high pressure N-MOS pipes respectively, so as to judge which turns on which cut-off, that is, antenna
Whether transmission signal or carry out signal acquisition；Each MOSFET gate signals voltage potential is isolated in order to reach, using two
DC-DC DC Modules are respectively that each high pressure N-MOS pipes provide corresponding reference potential, so as to realize rapidly and accurately switching hair
Penetrate the purpose with reception antenna.For MOSFET drive circuit, using high side switches mode, earthing potential and load are eliminated
The problem of energization.
A kind of course of work of antenna fast switching system for NMR while drilling of the utility model：
First, host computer 6, firing order is sent by master control sequence circuit 1, emitted circuit 2 is launched to antenna probes 7
Electric current, DC pulse polarization is carried out to the hydrogen-rich materials around probe, Hydrogen Proton in probe ambient substance is produced energy level transition,
Substantial amounts of Hydrogen Proton transits to high level, completes to excite hydrogen-rich materials.
After the completion of exciting, host computer 6 is sent by master control sequence circuit 1 receives order, and fast switch circuit 3 carries out antenna
Switching, now antenna probes 7 are reception antenna, and NMR signal with harmonious preceding electric discharge road 4, acquisition process and is deposited through low noise
Storing up electricity road 5 reaches host computer 6 and is shown and stored.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (6)
- A kind of 1. antenna fast switching system for NMR while drilling, it is characterised in that including：Master control sequential electricity Road, radiating circuit, fast switch circuit, host computer and antenna probes；Wherein：Master control sequence circuit, it is connected with the radiating circuit, fast switch circuit and host computer, receives the manipulation that host computer is sent Signal, transmits signals to radiating circuit, and transmission receives signal to fast switch circuit；Radiating circuit, it is connected with the antenna probes, to antenna probes emission current；Antenna probes, to launch the coil integrated with receiving, the hydrogen-rich materials around probe are excited as transmitting coil, NMR signal is received as reception antenna；Fast switch circuit, it is connected with the antenna probes, the switching that the antenna probes are launched and received.
- 2. it is used for the antenna fast switching system of NMR while drilling according to claim 1, it is characterised in that also wrap The low noise being connected with fast switch circuit is included to be connected with harmonious preceding electric discharge road with harmonious preceding electric discharge road, and with the low noise Acquisition process and storage circuit, the NMR signal is after low noise is with electric discharge road advance signal processing before harmonious, warp Acquisition process and storage circuit reach the host computer being connected with the output end of the acquisition process and storage circuit carry out display with Storage.
- 3. it is used for the antenna fast switching system of NMR while drilling according to claim 1, it is characterised in that described Fast switch circuit includes isolated drive circuit and two high-voltage MOS pipes, and the isolated drive circuit is that two high-voltage MOS pipes carry For corresponding reference voltage, antenna probes are connected by the output end of the high-voltage MOS pipe.
- 4. it is used for the antenna fast switching system of NMR while drilling according to claim 3, it is characterised in that described Isolated drive circuit includes two DC-DC power modules, optocoupler and driving chip, and two DC-DC power modules are all connected with light Coupling and driving chip, the master control sequence circuit send signal and send driving chip to by optocoupler, and driving chip uses two-way Output controls two high-voltage MOS pipes respectively, judges that antenna probes carry out transmission signal or carry out signal acquisition.
- 5. it is used for the antenna fast switching system of NMR while drilling according to claim 4, it is characterised in that described The model IXDD409 chips that driving chip uses.
- 6. it is used for the antenna fast switching system of NMR while drilling according to claim 4, it is characterised in that described Optocoupler uses high temperature resistant optocoupler, the model TPL2301 of high temperature resistant optocoupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720873240.1U CN206920623U (en) | 2017-07-18 | 2017-07-18 | A kind of antenna fast switching system for NMR while drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720873240.1U CN206920623U (en) | 2017-07-18 | 2017-07-18 | A kind of antenna fast switching system for NMR while drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206920623U true CN206920623U (en) | 2018-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720873240.1U Expired - Fee Related CN206920623U (en) | 2017-07-18 | 2017-07-18 | A kind of antenna fast switching system for NMR while drilling |
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| CN (1) | CN206920623U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108663972A (en) * | 2018-05-23 | 2018-10-16 | 中国石油大学(北京) | NMR while drilling instrument master control system and device |
-
2017
- 2017-07-18 CN CN201720873240.1U patent/CN206920623U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108663972A (en) * | 2018-05-23 | 2018-10-16 | 中国石油大学(北京) | NMR while drilling instrument master control system and device |
| US11280932B2 (en) | 2018-05-23 | 2022-03-22 | China University Of Petroleum-Beijing | Main control system and a device for a nuclear magnetic resonance logging while drilling tool |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180123 Termination date: 20180718 |
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| CF01 | Termination of patent right due to non-payment of annual fee |