CN205901254U - Logging while drilling instrument protection device based on sampling resistor - Google Patents
Logging while drilling instrument protection device based on sampling resistor Download PDFInfo
- Publication number
- CN205901254U CN205901254U CN201620785784.8U CN201620785784U CN205901254U CN 205901254 U CN205901254 U CN 205901254U CN 201620785784 U CN201620785784 U CN 201620785784U CN 205901254 U CN205901254 U CN 205901254U
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- China
- Prior art keywords
- sampling resistor
- logging
- joint
- device based
- protection device
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Abstract
The utility model discloses a logging while drilling instrument protection device based on sampling resistor, the electronic control apparatus comprises a circuit board, be provided with sampling resistor, voltage comparater, singlechip and MOS switch module on the circuit board, the sampling resistor is connected with oil logging instrument's power supply interface in the pit, voltage comparater is connected with the sampling resistor, and the singlechip is connected with voltage comparater and MOS switch module respectively. Through the utility model discloses an overcurrent protect device, oil logging instrument in drilling process in the pit, when system's operating current increases suddenly, timely open circuit, protection oil logging instrument, when current recovery just often, the singlechip will recover to switch on by automatic control relay, makes circuit the normal power supply, does not need artificially to change the fuse, when having saved the manpower and materials cost, has greatly improved oil well logging efficiency.
Description
Technical field
The utility model is related to petroleum exploration well logging field, and the more particularly, to connector for logging while drilling based on sampling resistor is protected
Device.
Background technology
Petroleum industry well logging lwd (logging while drilling) generally refers to measurement during drilling well
Formation rock physical parameter, and with data telemetry system, measurement result is delivered in real time ground and processed.Due to current data
The restriction of transmission technology, substantial amounts of data storage, in the memory of downhole instrument, plays back after trip-out.Measurement while drilling mwd
(measurement while drilling) generally refers to drilling engineering parameter measurement, as hole deviation, orientation and tool-face etc.
Measurement.Sometimes, mwd refers to all of underground survey during drilling well.
Due to well logging obtain formation parameter be just to have bored the formation parameter opened, it closest to the reset condition on stratum,
For more favourable than general wireline logging to the oil-containing of bad ground, gas evaluation.Connector for logging while drilling is placed in drill collar, except measurement
Outside the conventional loggings such as resistivity, the velocity of sound, neutron porosity, density and some imaging loggings, also measurement the pressure of the drill, moment of torsion, rotating speed, ring
Pneumatics power, temperature, the drilling parameter such as chemical composition.Bad environments in drill bit drilling process, temperature is very high, and pressure greatly, vibrates
Strongly, downhole temperature often reaches more than 150 DEG C, and therefore, the requirement to the high temperature resistant property of downhole petroleum logger is higher.
Common downhole petroleum logger includes: magnetic compass list, multishot instrument, steering tool, no
Line directional tool, EMI, photograph list, multiple spot gyrolevel, electronic gyroscope inclinometer etc..
Oil well logging instrument is during downhole drill, if running into harder rock or the short-circuit feelings of circuit appearance
Condition, system operating current can increase suddenly, can burn out electronic circuit when serious, affects construction speed.At present conventional method be
System power supply end seals in a fuse, and if there is over-current phenomenon avoidance, fuse fuses automatically, protects electronic circuit.But this
Kind of fuse is only capable of protection once, has blown and has needed to change, and when changing fuse, needs to interrupt construction, and by whole string instrument from
Well head is brought up, and wastes time and energy.The operating temperature range of most of on the market resettable fuses is between -40 DEG C to 85 at present
DEG C, also cannot meet and be actually needed.
Utility model content
In order to solve above-mentioned technical problem, provide one kind can be more than or equal to 150 DEG C of work in high temperature environments, possess
Stream protection and the automatic device recovering, the utility model provides a kind of protection dress of the connector for logging while drilling based on sampling resistor
Put, including circuit board, described circuit board is provided with sampling resistor, voltage comparator, single-chip microcomputer and mos switch module, described
Sampling resistor is connected with the power supply interface of downhole petroleum logger, and described voltage comparator is connected with sampling resistor, for
The voltage at sampling resistor two ends is higher than to export high level during predetermined threshold value, is not higher than predetermined threshold value in the voltage using resistance two ends
When export low level, the electric current that the power supply interface of voltage and the downhole petroleum logger of voltage comparator output exports is related
Connection；
Described mos switch module is connected in the power supply output circuit of downhole petroleum logger；
Described single-chip microcomputer is connected with described voltage comparator and mos switch module respectively, for receiving described voltage ratio relatively
The voltage of device output；
Described single-chip microcomputer controls described mos switch module cut-off when described voltage reaches default overloading threshold, and
Control described mos switch module conducting after the scheduled time, again the voltage of receiving voltage comparator measurement, and judge to receive again
Voltage whether be less than described overloading threshold, if so, then control described mos switch module conducting, if it is not, then controlling described mos
Switch module ends.
Further, shell and cover plate are also included, described inside the shell offers the groove for accommodating described circuit board, institute
State circuit board to be arranged in described groove.
Further, the first joint and the second joint are also included, described first joint and the second joint are separately positioned on institute
State the two ends of shell, and described first joint and the second joint are all connected with described circuit board.
Further, also include collar, described collar is arranged on outside described second joint, described collar and described shell
It is flexibly connected.
Further, also include current amplifier, described current amplifier is used for measurement downhole petroleum logger
The output current of power supply interface is amplified.
Further, described shell is cylinder.
Further, described first joint is three adapters, and described second joint is ten adapters, and described second joint
It is connected with described collar.
Further, when the operating current of described downhole petroleum logger is 1a-1.5a, described overloading threshold is 3a.
Further, when the operating current of described downhole petroleum logger is 200ma-1a, described overloading threshold is 2a.
Device of the present utility model is provided with voltage comparator, sampling resistor, single-chip microcomputer and mos switch module, by electricity
Pressure comparator obtains the information of voltage using resistance, and then judges the electric current of the power supply interface of downhole petroleum logger, monolithic
Machine controls described mos switch module cut-off when described voltage reaches default overloading threshold, and controls institute after the scheduled time
State the conducting of mos switch module, again the voltage of receiving voltage comparator output, and judge whether the voltage receiving again is less than institute
State overloading threshold, if so, then control described mos switch module conducting, if it is not, then controlling described mos switch module cut-off.Above-mentioned
Circuit function module can work (more than or equal to 150 DEG C) in high temperature environments and possess overcurrent protection and auto restore facility.
In addition, the utility model is also provided with shell and two interfaces, circuit board is arranged on inside the shell, makes the steady of device
Qualitative higher, versatility more preferably, is convenient for changing.
By overcurrent protective device of the present utility model, oil well logging instrument, during downhole drill, works in system
When electric current increases suddenly, can disconnecting circuit in time, protect oil well logging instrument, when electric current recovers normal, single-chip microcomputer meeting again
Automatically control mos switch module and recover conducting, make circuit normal power supply it is not necessary to artificially change fuse, save manpower thing
While power cost, drastically increase oil well logging efficiency.
Brief description
In order to be illustrated more clearly that the utility model embodiment or technical scheme of the prior art and advantage, below will be right
In embodiment or description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, below describe in attached
Figure is only some embodiments of the present utility model, for those of ordinary skill in the art, is not paying creative work
On the premise of, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the decomposing schematic representation of the connector for logging while drilling protection device based on sampling resistor that the utility model provides；
Fig. 2 is the structured flowchart of circuit board of the present utility model.
In figure: 1- shell, 2- first joint, 3- second joint, 4- circuit board, 41- sampling resistor, 42- single-chip microcomputer, 43-
Mos switch module, 44- voltage comparator, 45- current amplifier, 5- cover plate, 6- collar, 7- groove, 8- downhole petroleum logging instrument
Device, 81- power supply interface.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely description is it is clear that described embodiment is only a part of embodiment of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the premise of creative work
Lower obtained every other embodiment, broadly falls into the scope of the utility model protection.
Embodiment:
Refer to Fig. 1, Fig. 2, the utility model provides a kind of connector for logging while drilling protection device based on sampling resistor,
Including circuit board 4, described circuit board is provided with sampling resistor 41, voltage comparator 44, single-chip microcomputer 42 and mos switch module
43, described sampling resistor 41 is connected with the power supply interface 81 of downhole petroleum logger 8, and described voltage comparator 44 is electric with sampling
Resistance 41 connection, is higher than to export high level during predetermined threshold value for the voltage at sampling resistor two ends, in the electricity using resistance two ends
Pressure is not higher than during predetermined threshold value and exports low level, voltage and the power supply interface of downhole petroleum logger that voltage comparator exports
The electric current of output is associated；
Described mos switch module 43 is connected in the power supply output circuit of downhole petroleum logger 8；
Described single-chip microcomputer 42 is connected with described voltage comparator 44 and mos switch module 43 respectively, for receiving described electricity
The voltage of pressure comparator 44 output；
Described single-chip microcomputer 42 controls described mos switch module 43 to end when described voltage reaches default overloading threshold,
And control described mos switch module 43 to turn on after the scheduled time, the voltage of receiving voltage comparator 44 measurement again, and judge
Whether the voltage receiving again is less than described overloading threshold, if so, then controls described mos switch module 43 to turn on, if it is not, then controlling
Make described mos switch module 43 to end.
Further, also include shell 1 and cover plate 5, offer for accommodating the recessed of described circuit board 4 in described shell 1
Groove 7, described circuit board 4 is arranged in described groove 7.
Further, the first joint 2 and the second joint 3 are also included, described first joint 2 and the second joint 3 are respectively provided with
At the two ends of described shell 1, and described first joint 2 and the second joint 3 are all connected with described circuit board 4.
Further, also include collar 6, described collar 6 is arranged on outside described second joint 3, described collar 6 with described
Shell 1 is flexibly connected.
Further, also include current amplifier 45, described current amplifier 45 is used for measurement downhole petroleum logging instrument
The output current of the power supply interface 81 of device 8 is amplified.
Further, described shell 1 is cylinder.
Further, described first joint 2 is three adapters, and described second joint 3 is ten adapters, and described second connects
3 are connected with described collar 6.
Further, when the operating current of described downhole petroleum logger 8 is 1a-1.5a, described overloading threshold is 3a.
Device of the present utility model is provided with voltage comparator, sampling resistor, single-chip microcomputer and mos switch module, by electricity
Pressure comparator obtains the information of voltage using resistance, and then judges the electric current of the power supply interface of downhole petroleum logger, monolithic
Machine controls described mos switch module cut-off when described voltage reaches default overloading threshold, and controls institute after the scheduled time
State the conducting of mos switch module, again the voltage of receiving voltage comparator output, and judge whether the voltage receiving again is less than institute
State overloading threshold, if so, then control described mos switch module conducting, if it is not, then controlling described mos switch module cut-off.Above-mentioned
Circuit function module can work (more than or equal to 150 DEG C) in high temperature environments and possess overcurrent protection and auto restore facility.
In addition, the utility model is also provided with shell and two interfaces, circuit board is arranged on inside the shell, makes the steady of device
Qualitative higher, versatility more preferably, is convenient for changing.
By overcurrent protective device of the present utility model, oil well logging instrument, during downhole drill, works in system
When electric current increases suddenly, can disconnecting circuit in time, protect oil well logging instrument, when electric current recovers normal, single-chip microcomputer meeting again
Automatically control mos switch module and recover conducting, make circuit normal power supply it is not necessary to artificially change fuse, save manpower thing
While power cost, drastically increase oil well logging efficiency.
The above is preferred embodiment of the present utility model it is noted that ordinary skill for the art
For personnel, on the premise of without departing from the utility model principle, some improvements and modifications can also be made, these improve and moisten
Decorations are also considered as protection domain of the present utility model.
Claims (7)
1. the connector for logging while drilling protection device based on sampling resistor is it is characterised in that include circuit board (4), described circuit board
On be provided with sampling resistor (41), voltage comparator (44), single-chip microcomputer (42) and mos switch module (43), described sampling resistor
(41) it is connected with the power supply interface (81) of downhole petroleum logger (8), described voltage comparator (44) and sampling resistor (41)
Connect；
Described mos switch module (43) is connected in the power supply output circuit of downhole petroleum logger (8)；
Described single-chip microcomputer (42) is connected with described voltage comparator (44) and mos switch module (43) respectively.
2. the connector for logging while drilling protection device based on sampling resistor according to claim 1 is it is characterised in that also include
Shell (1) and cover plate (5), offer the groove (7) for accommodating described circuit board (4), described circuit board in described shell (1)
(4) it is arranged in described groove (7).
3. the connector for logging while drilling protection device based on sampling resistor according to claim 2 is it is characterised in that also include
First joint (2) and the second joint (3), described first joint (2) and the second joint (3) are separately positioned on described shell (1)
Two ends, and described first joint (2) and the second joint (3) be all connected with described circuit board (4).
4. the connector for logging while drilling protection device based on sampling resistor according to claim 3 is it is characterised in that also include
Collar (6), described collar (6) is arranged on outside described second joint (3), and described collar (6) is with described shell (1) activity even
Connect.
5. the connector for logging while drilling protection device based on sampling resistor according to claim 1 is it is characterised in that also include
Current amplifier (45).
6. the connector for logging while drilling protection device based on sampling resistor according to claim 2 is it is characterised in that described outer
Shell (1) is cylinder.
7. the connector for logging while drilling protection device based on sampling resistor according to claim 4 is it is characterised in that described
One joint (2) is three adapters, and described second joint (3) is ten adapters, and described second joint (3) and described collar (6)
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620785784.8U CN205901254U (en) | 2016-07-25 | 2016-07-25 | Logging while drilling instrument protection device based on sampling resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620785784.8U CN205901254U (en) | 2016-07-25 | 2016-07-25 | Logging while drilling instrument protection device based on sampling resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205901254U true CN205901254U (en) | 2017-01-18 |
Family
ID=57784262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620785784.8U Expired - Fee Related CN205901254U (en) | 2016-07-25 | 2016-07-25 | Logging while drilling instrument protection device based on sampling resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205901254U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114465198A (en) * | 2022-03-10 | 2022-05-10 | 陕西瑞禾景明科技有限公司 | Abnormal current control circuit and control method of geophone |
-
2016
- 2016-07-25 CN CN201620785784.8U patent/CN205901254U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114465198A (en) * | 2022-03-10 | 2022-05-10 | 陕西瑞禾景明科技有限公司 | Abnormal current control circuit and control method of geophone |
| CN114465198B (en) * | 2022-03-10 | 2023-01-24 | 陕西瑞禾景明科技有限公司 | Abnormal current control circuit and control method of geophone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170118 Termination date: 20210725 |