CN106099838A - Connector for logging while drilling protection device based on sampling resistor - Google Patents
Connector for logging while drilling protection device based on sampling resistor Download PDFInfo
- Publication number
- CN106099838A CN106099838A CN201610589458.4A CN201610589458A CN106099838A CN 106099838 A CN106099838 A CN 106099838A CN 201610589458 A CN201610589458 A CN 201610589458A CN 106099838 A CN106099838 A CN 106099838A
- Authority
- CN
- China
- Prior art keywords
- sampling resistor
- logging
- joint
- connector
- switch module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of connector for logging while drilling protection device based on sampling resistor; including circuit board; sampling resistor, voltage comparator, single-chip microcomputer and MOS switch module it is provided with on described circuit board; described sampling resistor is connected with the power supply interface of downhole petroleum logger; described voltage comparator is connected with sampling resistor, and single-chip microcomputer is connected with voltage comparator and MOS switch module respectively.By the overcurrent protective device of the present invention; oil well logging instrument is during downhole drill; when system operating current increases suddenly, it is possible to disconnecting circuit in time, protect oil well logging instrument; when electric current recovers normal; single-chip microcomputer can recover conducting by automatic control relay again, makes circuit normal power supply, it is not necessary to artificially change electric fuse; while saving manpower and materials cost, drastically increase oil well logging efficiency.
Description
Technical field
The present invention relates to petroleum exploration well logging field, particularly relate to connector for logging while drilling based on sampling resistor protection dress
Put.
Background technology
Petroleum industry well logging during LWD (Logging While Drilling) generally refers to measure during drilling well
Formation rock physical parameter, and with data telemetry system, measurement result is delivered to ground in real time and process.Due to current data
The restriction of transmission technology, substantial amounts of data are stored in the memorizer of downhole instrument, play back after trip-out.Measurement while drilling MWD
(Measurement While Drilling) generally refers to drilling engineering parameter and measures, such as hole deviation, orientation and tool-face etc.
Measure.Sometimes, MWD refers to all of underground survey during drilling well.
The formation parameter obtained due to well logging during is just to bore the formation parameter opened, and it is closest to the initial condition on stratum,
For more favourable than general wireline logging to oil-containing, the gas evaluation of bad ground.Connector for logging while drilling is placed in drill collar, except measuring
Outside the conventional loggings such as resistivity, the velocity of sound, neutron porosity, density and some imaging logging, also measure 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 the highest, and pressure is very big, vibration
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, nothing
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 circuit appearance short circuit feelings
Condition, system operating current can increase suddenly, can burn out electronic circuit, affect construction speed time serious.At present conventional method be
System power supply end seals in an electric fuse, and if there is over-current phenomenon avoidance, electric fuse fuses automatically, protects electronic circuit.But this
Kind of electric fuse is only capable of protecting once, has blown and has needed to change, and when changing electric 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 the most most of resettable fuses is between-40 DEG C to 85 at present
DEG C, also cannot meet and be actually needed.
Summary of the invention
In order to solve above-mentioned technical problem, it is provided that one can be more than or equal to 150 DEG C of work in high temperature environments, possess
Stream protection and the device automatically recovered, the invention provides a kind of connector for logging while drilling protection device based on sampling resistor, bag
Include circuit board, described circuit board is provided with sampling resistor, voltage comparator, single-chip microcomputer and MOS switch module, described sampling electricity
Resistance is connected with the power supply interface of downhole petroleum logger, and described voltage comparator is connected with sampling resistor, at sampling electricity
The voltage at resistance two ends is higher than output high level during predetermined threshold value, the output when the voltage using resistance two ends is not higher than predetermined threshold value
Low level, the electric current that the voltage of voltage comparator output exports with the power supply interface of downhole petroleum logger is associated；
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, is used for receiving described voltage ratio relatively
The voltage of device output；
Described single-chip microcomputer controls the cut-off of described MOS switch module when described voltage reaches default overloading threshold, and
Control the conducting of described MOS switch module after the scheduled time, again receive the voltage that voltage comparator is measured, and judge again to receive
Voltage whether less than described overloading threshold, the most then control the conducting of described MOS switch module, if it is not, then control described MOS
Switch module ends.
Further, also include shell and cover plate, in described shell, offer the groove for accommodating described circuit board, institute
State circuit board to be arranged in described groove.
Further, also include that the first joint and the second joint, 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 that collar, described collar are arranged on outside described second joint, described collar and described shell
It is flexibly connected.
Further, also including current amplifier, described current amplifier is for measuring downhole petroleum logger
The output electric current of power supply interface is amplified.
Further, described shell is cylindrical.
Further, described first joint is three needle adapters, and described second joint is ten needle 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.
Assembly of the invention is provided with voltage comparator, sampling resistor, single-chip microcomputer and MOS switch module, passes through voltage ratio
The information of voltage of relatively device acquisition employing resistance, and then judge the electric current of the power supply interface of downhole petroleum logger, single-chip microcomputer exists
Described voltage reaches to control the cut-off of described MOS switch module during default overloading threshold, and controls described MOS after the scheduled time
Switch module turns on, and again receives the voltage of voltage comparator output, and judges that whether the voltage again received is less than described mistake
Carry threshold value, the most then control the conducting of described MOS switch module, if it is not, then control the cut-off of described MOS switch module.Foregoing circuit
Functional module can work (more than or equal to 150 DEG C) in high temperature environments and possess overcurrent protection and auto restore facility.
It addition, the present invention is also provided with shell and two interfaces, circuit board is arranged in the enclosure, makes the stability of device
Higher, versatility is more preferable, is convenient for changing.
By the overcurrent protective device of the present invention, oil well logging instrument is during downhole drill, at system operating current
When increasing suddenly, it is possible to disconnecting circuit in time, protecting oil well logging instrument, when electric current recovers normal, single-chip microcomputer again can be automatic
Control MOS switch module recovery conducting, make circuit normal power supply, it is not necessary to artificially change electric fuse, save manpower and materials
While Ben, drastically increase oil well logging efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art and advantage, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only
It is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawing 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 present invention provides；
Fig. 2 is the structured flowchart of the circuit board of the present invention.
In figure: 1-shell, 2-the first joint, 3-the 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.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of not making creative work all its
His embodiment, broadly falls into the scope of protection of the invention.
Embodiment:
Refer to Fig. 1, Fig. 2, the invention 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, institute
State sampling resistor 41 to be connected with the power supply interface 81 of downhole petroleum logger 8, described voltage comparator 44 and sampling resistor 41
Connect, for the voltage at sampling resistor two ends higher than output high level during predetermined threshold value, using the voltage at resistance two ends not
Higher than output low level during predetermined threshold value, the voltage of voltage comparator output exports with the power supply interface of downhole petroleum logger
Electric current be 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, is used for receiving described electricity
The voltage of pressure comparator 44 output；
Described single-chip microcomputer 42 controls described MOS switch module 43 when described voltage reaches default overloading threshold to be ended,
And after the scheduled time, control described MOS switch module 43 turn on, again receive the voltage that voltage comparator 44 is measured, and judge
Whether the voltage again received less than described overloading threshold, the most then controls described MOS switch module 43 and turns on, if it is not, then control
Make described MOS switch module 43 to end.
Further, also include shell 1 and cover plate 5, offer in described shell 1 for accommodating the recessed of described circuit board 4
Groove 7, described circuit board 4 is arranged in described groove 7.
Further, also include that the first joint 2 and the second joint 3, 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 including that collar 6, described collar 6 are arranged on outside described second joint 3, described collar 6 is with described
Shell 1 is flexibly connected.
Further, also including current amplifier 45, described current amplifier 45 is for measuring downhole petroleum logging instrument
The output electric current of the power supply interface 81 of device 8 is amplified.
Further, described shell 1 is cylindrical.
Further, described first joint 2 is three needle adapters, and described second joint 3 is ten needle 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.
Assembly of the invention is provided with voltage comparator, sampling resistor, single-chip microcomputer and MOS switch module, passes through voltage ratio
The information of voltage of relatively device acquisition employing resistance, and then judge the electric current of the power supply interface of downhole petroleum logger, single-chip microcomputer exists
Described voltage reaches to control the cut-off of described MOS switch module during default overloading threshold, and controls described MOS after the scheduled time
Switch module turns on, and again receives the voltage of voltage comparator output, and judges that whether the voltage again received is less than described mistake
Carry threshold value, the most then control the conducting of described MOS switch module, if it is not, then control the cut-off of described MOS switch module.Foregoing circuit
Functional module can work (more than or equal to 150 DEG C) in high temperature environments and possess overcurrent protection and auto restore facility.
It addition, the present invention is also provided with shell and two interfaces, circuit board is arranged in the enclosure, makes the stability of device
Higher, versatility is more preferable, is convenient for changing.
By the overcurrent protective device of the present invention, oil well logging instrument is during downhole drill, at system operating current
When increasing suddenly, it is possible to disconnecting circuit in time, protecting oil well logging instrument, when electric current recovers normal, single-chip microcomputer again can be automatic
Control MOS switch module recovery conducting, make circuit normal power supply, it is not necessary to artificially change electric fuse, save manpower and materials
While Ben, drastically increase oil well logging efficiency.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (9)
1. connector for logging while drilling protection device based on sampling resistor, 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, is used for receiving described
The voltage that voltage comparator (44) exports；
Described single-chip microcomputer (42) controls the cut-off of described MOS switch module (43) when described voltage reaches default overloading threshold,
And after the scheduled time, control the conducting of described MOS switch module (43), again receive the voltage that voltage comparator (44) is measured, and
Judge that the voltage again received whether less than described overloading threshold, the most then controls the conducting of described MOS switch module (43), if
No, then control the cut-off of described MOS switch module (43).
Connector for logging while drilling protection device based on sampling resistor the most according to claim 1, 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).
Connector for logging while drilling protection device based on sampling resistor the most according to claim 2, 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).
Connector for logging while drilling protection device based on sampling resistor the most according to claim 3, it is characterised in that also include
Collar (6), described collar (6) is arranged on described second joint (3) outside, and described collar (6) is movable with described shell (1) even
Connect.
Connector for logging while drilling protection device based on sampling resistor the most according to claim 1, it is characterised in that also include
Current amplifier (45), described current amplifier (45) is for the power supply interface (81) measuring downhole petroleum logger (8)
Output electric current be amplified.
Connector for logging while drilling protection device based on sampling resistor the most according to claim 2, it is characterised in that outside described
Shell (1) is cylindrical.
Connector for logging while drilling protection device based on sampling resistor the most according to claim 4, it is characterised in that described
One joint (2) is three needle adapters, and described second joint (3) is ten needle adapters, and described second joint (3) and described collar (6)
Connect.
Connector for logging while drilling protection device based on sampling resistor the most according to claim 1, it is characterised in that described well
When the operating current of lower oil well logging instrument (8) is 1A-1.5A, described overloading threshold is 3A.
Connector for logging while drilling protection device based on sampling resistor the most according to claim 1, it is characterised in that described well
When the operating current of lower oil well logging instrument (8) is 200mA-1A, described overloading threshold is 2A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610589458.4A CN106099838A (en) | 2016-07-25 | 2016-07-25 | Connector for logging while drilling protection device based on sampling resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610589458.4A CN106099838A (en) | 2016-07-25 | 2016-07-25 | Connector for logging while drilling protection device based on sampling resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106099838A true CN106099838A (en) | 2016-11-09 |
Family
ID=57449287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610589458.4A Pending CN106099838A (en) | 2016-07-25 | 2016-07-25 | Connector for logging while drilling protection device based on sampling resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106099838A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107743020A (en) * | 2017-11-30 | 2018-02-27 | 贝兹维仪器(苏州)有限公司 | A kind of signal amplification circuit |
| CN111411944A (en) * | 2020-04-27 | 2020-07-14 | 无锡量子感知研究所 | Nuclear magnetic resonance logging while drilling instrument and working mode control method and system thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5181155A (en) * | 1990-08-30 | 1993-01-19 | Beg Mirza A | Overcurrent trip circuit |
| CN202309017U (en) * | 2011-11-16 | 2012-07-04 | 成都芯通科技股份有限公司 | Overcurrent protection system for GPS (Global Positioning System) active antenna |
| CN203097866U (en) * | 2013-02-01 | 2013-07-31 | 天津领航电气制造有限公司 | Sealing outer shell for oil well downhole detecting device |
| CN203135393U (en) * | 2013-03-05 | 2013-08-14 | 深圳Tcl新技术有限公司 | Current foldback circuit for hot swapping fittings of electronic equipment |
| CN105244850A (en) * | 2015-10-09 | 2016-01-13 | 深圳市沛城电子科技有限公司 | Battery protection circuit and control method therefor |
-
2016
- 2016-07-25 CN CN201610589458.4A patent/CN106099838A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5181155A (en) * | 1990-08-30 | 1993-01-19 | Beg Mirza A | Overcurrent trip circuit |
| CN202309017U (en) * | 2011-11-16 | 2012-07-04 | 成都芯通科技股份有限公司 | Overcurrent protection system for GPS (Global Positioning System) active antenna |
| CN203097866U (en) * | 2013-02-01 | 2013-07-31 | 天津领航电气制造有限公司 | Sealing outer shell for oil well downhole detecting device |
| CN203135393U (en) * | 2013-03-05 | 2013-08-14 | 深圳Tcl新技术有限公司 | Current foldback circuit for hot swapping fittings of electronic equipment |
| CN105244850A (en) * | 2015-10-09 | 2016-01-13 | 深圳市沛城电子科技有限公司 | Battery protection circuit and control method therefor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107743020A (en) * | 2017-11-30 | 2018-02-27 | 贝兹维仪器(苏州)有限公司 | A kind of signal amplification circuit |
| CN111411944A (en) * | 2020-04-27 | 2020-07-14 | 无锡量子感知研究所 | Nuclear magnetic resonance logging while drilling instrument and working mode control method and system thereof |
| CN111411944B (en) * | 2020-04-27 | 2024-04-09 | 国仪石油技术(无锡)有限公司 | Nuclear magnetic resonance logging while drilling instrument and working mode control method and system thereof |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161109 |
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| RJ01 | Rejection of invention patent application after publication |