CN202578667U - Well logging coupling detecting system - Google Patents
Well logging coupling detecting system Download PDFInfo
- Publication number
- CN202578667U CN202578667U CN 201220155950 CN201220155950U CN202578667U CN 202578667 U CN202578667 U CN 202578667U CN 201220155950 CN201220155950 CN 201220155950 CN 201220155950 U CN201220155950 U CN 201220155950U CN 202578667 U CN202578667 U CN 202578667U
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- China
- Prior art keywords
- well logging
- control unit
- induction coil
- circuit
- bus interface
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- Withdrawn - After Issue
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Abstract
The utility model relates to a coupling detecting technology under a well, and provides a well logging coupling detecting system used for detection of joint positions of sleeve tubes under the well and sleeve tubes. The well logging coupling detecting system comprises magnets, an induction coil, a sidewall contact device and an electrical control unit, wherein the sidewall contact device has three sidewall contact polar plates which mutually form 120 degree angles, a group of magnets used for producing magnetic fields in surrounding environment and provided with North-South (N-S) electrodes are arranged on the inner wall tightly close to the outer side of the sidewall contact polar plates, the induction coil is arranged on a position tightly attached to the magnets, two tap heads of the induction coil are directly output to the electrical control unit, and the electrical control unit is composed of a program control amplifying circuit, an active filter circuit, an analog to digital (A/D) switching circuit, a microprogrammed control unit (MCU) processing circuit and a three-bus interface module in a linkage mode in sequence. The well logging coupling detecting system is high in integration degree, simple and convenient to maintain, and strong in anti-interference ability .
Description
Technical field
The utility model relates to a kind of down-hole box cupling detection technique, and specifically a kind of well logging box cupling detection system is applied to the detection of down-hole casing and sleeve pipe junction.
Background technology
Along with hyundai electronics and computer technology rapid development, logger is brought in constant renewal in and is regenerated, and having formed is the numerical control logging instrument at center with the electrical log.Well logging box cupling detection system is the important component part in the oil well logging cable depth correction instrument device; Its principle is that the not specification of well logging process middle sleeve box cupling place casing wall exerts an influence to the magnetic line of force; The variation that induction coil is sensed this magnetic line of force produces a voltage signal; This voltage signal is sent into and is sent into ground after subsequent conditioning circuit is handled and export with figure, and the terrestrial operation personnel combine to save the hoop data, can judge well depth.
Measurement box cupling system commonly used at present is many to be constituted with no backup mode, can produce a lot of interference voltage outputs in the well logging process, poor anti jamming capability, and unreasonable structure, maintenance difficult.
Summary of the invention
The purpose of the utility model is exactly in order to overcome the weak point of above-mentioned prior art; And a kind of dark box cupling detection system in logging cable school that is applied to is provided; Its integrated level is high; Keep in repair easyly, antijamming capability is strong, and this box cupling detection system is applicable to the logging system of the half-or full-duplex mode of seven core cable, single-core cable, other cable.
The purpose of the utility model realizes through following technical measures: a kind of well logging box cupling detection system; Comprise magnet, induction coil, telescoping ram, electric control unit; Said telescoping ram has three backup pole plates, and three backup pole plates are mutually 120 degree angles, is close to backup pole plate outside inwall and is provided with one group of magnet in environment generation magnetic field around that is used for N-S utmost point; Be close to magnet and be provided with induction coil, induction coil two taps directly output to electric control unit; Said electric control unit is connected successively and is formed by programmable amplifying circuit, active filter circuit, A/D convertor circuit, MCU treatment circuit, three bus interface modules.
In technique scheme, said induction coil is to be wound on the cuboid bar magnet by the high temperature lacquer envelope curve to process, and its two tap directly outputs to the programmable amplifying circuit of electric control unit.
In technique scheme, said active filter circuit is three rank Butterworth bandpass filters, and the logical frequency of band is 0.5-10 Hz.
In technique scheme, said A/D convertor circuit adopts 12 ADC chips.
In technique scheme, said three bus interface modules and MCU treatment circuit utilize the serial ports communication that links to each other, and the RXD pin of three bus interface modules connects the TXD pin of MCU treatment circuit, and the TXD pin of three bus interface modules connects the RXD pin of MCU plate; The communication that links to each other with the EBI of outside telemetry system simultaneously of said three bus interface modules.
The utility model well logging box cupling detection system integrated level is high, and fault rate is low, maintenance is easy, compared with prior art has the following advantages:
1. make simple and easyly, cost performance is high, is fit to very much oil well logging cable school and uses deeply.
2. adopt the backup mode with magnet and coil stationary on pole plate, reduce system bulk greatly, the while can adapt to different borehole sizes.
3. coil-induced voltage output voltage stabilization, antijamming capability is strong, and signal amplitude is stable, does not change because of the well size variation.
4. applicable to the wireline logging method of the half-or full-duplex mode of seven core cable, single-core cable, other cable.
Description of drawings
Fig. 1 is the external structure sketch map of the utility model well logging box cupling detection system.
Fig. 2 is the internal construction sketch map of backup pole plate part in the utility model.
Fig. 3 is the circuit theory diagrams of electric control unit part in the utility model.
Wherein: 1. backup pole plate, 2. magnet, 3. induction coil.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further to describe.
Like Fig. 1, shown in 2; Present embodiment provides a kind of well logging box cupling detection system, comprises magnet, induction coil, telescoping ram, electric control unit, and said telescoping ram has three backup pole plates; Three backup pole plates are mutually 120 degree angles; Play a centralizer effect, magnet and induction coil are installed on the backup pole plate, telescoping ram can make stable being close on the sleeve pipe of pole plate.
Magnet is made up of one group of magnet with N-S utmost point, is close to backup pole plate outside inwall and installs, and effect is in the magnet surrounding environment, to produce magnetic field.
Induction coil is to be wound on the cuboid bar magnet by the high temperature lacquer envelope curve to process, and induction coil two taps directly output to electric control unit, and coil is close to magnet and is installed on the pole plate inboard, and effect is when the magnetic line of force changes, to produce induced voltage output.Because the backup pole plate is close on the casing wall and keeps a constant backup power with casing wall, so the variation that can not produce signal amplitude because borehole size is different of the induced voltage that produces of induction coil, advantages such as the strong stable output signal of antijamming capability had.
As shown in Figure 3, both be the circuit theory diagrams of electric control unit, also be box cupling signal acquisition process sketch map.Said electric control unit is connected successively and is formed by programmable amplifying circuit, active filter circuit, A/D convertor circuit, MCU treatment circuit, three bus interface modules.
When the magnet on the probe backup wall arrived the casing coupling place with certain speed, because the variation of casing wall thickness causes changes of magnetic field, this changes of magnetic field can make the induction coil that is installed together with it produce a box cupling signal.This signal is through programmable amplifying circuit and active filter circuit, and the programmable amplifying circuit control signal is sent by single-chip microcomputer, and control amplifier is to the multiplication factor of this box cupling signal.Signal after the amplification carries out filtering through one three rank Butterworth bandpass filter, and the logical frequency of its band is 0.5-10 Hz.
Filtered signal is sent into A/D convertor circuit, and in order to satisfy the data acquisition demand, A/D convertor circuit adopts 12 ADC chips, and transformation result is directly sent into the MCU treatment circuit.Under MCU control, the instruction that the real-time reception of MCU treatment circuit three bus interface modules are sent here receives the data that A/D convertor circuit is sent here simultaneously in real time, can guarantee downlink command like this and upload data parallel to carry out.
Three bus interface modules are mainly used in the form demodulation of under MCU control, accomplishing downlink command, the formatting modulation of upstream data; Adopt software to realize encoding and decoding; Help simplifying system results; Task such as data acquisition, transmission is independent separately in time, and timesharing is carried out, and three bus interface modules and MCU treatment circuit utilize the serial ports communication that links to each other; The RXD pin of three bus interface modules connects the TXD pin of MCU treatment circuit, and the TXD pin of three bus interface modules connects the RXD pin of MCU plate.
In order to articulate with existing ripe telemetry system with three EBIs, three bus interface modules are responsible for communicating by letter with the EBI of outside telemetry system simultaneously.Three bus interface modules have 2 communication ports, and one is the serial communication with MCU; One is and the communicating by letter of outside telemetry system.If this box cupling detection system articulates existing mature system,, communicate by letter with telemetry system and to adopt three bus modes to carry out for compatible with existing equipment; Three bus mode communications are mainly three signals; One is clock signal, and one is the downlink data instruction, and one is upstream data.
Telemetry system adopts the two-phase bit code to transmit information, has the following advantages.
1) data message transmits with clock information, transmission clock separately, and when the clock change of frequency less than 25% the time, do not influence the code value of transmission.
2) can effectively utilize the frequency bandwidth of cable.
3) the two-phase bit code does not have flip-flop, is convenient to cable transmission and transformer coupled.
Claims (5)
1. well logging box cupling detection system; It is characterized in that: comprise magnet, induction coil, telescoping ram, electric control unit; Said telescoping ram has three backup pole plates, and three backup pole plates are mutually 120 degree angles, is close to backup pole plate outside inwall and is provided with one group of magnet in environment generation magnetic field around that is used for N-S utmost point; Be close to magnet and be provided with induction coil, induction coil two taps directly output to electric control unit; Said electric control unit is connected successively and is formed by programmable amplifying circuit, active filter circuit, A/D convertor circuit, MCU treatment circuit, three bus interface modules.
2. well logging box cupling detection system according to claim 1 is characterized in that: said induction coil is to be wound on the cuboid bar magnet by the high temperature lacquer envelope curve to process, and its two tap directly outputs to the programmable amplifying circuit of electric control unit.
3. well logging box cupling detection system according to claim 1 is characterized in that: said active filter circuit is three rank Butterworth bandpass filters, and the logical frequency of band is 0.5-10 Hz.
4. well logging box cupling detection system according to claim 1 is characterized in that: said A/D convertor circuit adopts 12 ADC chips.
5. well logging box cupling detection system according to claim 1; It is characterized in that: said three bus interface modules and MCU treatment circuit utilize the serial ports communication that links to each other; The RXD pin of three bus interface modules connects the TXD pin of MCU treatment circuit, and the TXD pin of three bus interface modules connects the RXD pin of MCU plate; The communication that links to each other with the EBI of outside telemetry system simultaneously of said three bus interface modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220155950 CN202578667U (en) | 2012-04-13 | 2012-04-13 | Well logging coupling detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220155950 CN202578667U (en) | 2012-04-13 | 2012-04-13 | Well logging coupling detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202578667U true CN202578667U (en) | 2012-12-05 |
Family
ID=47248088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220155950 Withdrawn - After Issue CN202578667U (en) | 2012-04-13 | 2012-04-13 | Well logging coupling detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202578667U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606142A (en) * | 2012-04-13 | 2012-07-25 | 武汉海阔科技有限公司 | Logging coupling detection system |
-
2012
- 2012-04-13 CN CN 201220155950 patent/CN202578667U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606142A (en) * | 2012-04-13 | 2012-07-25 | 武汉海阔科技有限公司 | Logging coupling detection system |
| CN102606142B (en) * | 2012-04-13 | 2014-12-10 | 武汉海阔科技有限公司 | Logging coupling detection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121205 Effective date of abandoning: 20141210 |
|
| RGAV | Abandon patent right to avoid regrant |