CN109781340A - A kind of bit pressure and torque rating test device and scaling method - Google Patents
A kind of bit pressure and torque rating test device and scaling method Download PDFInfo
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- CN109781340A CN109781340A CN201910059540.XA CN201910059540A CN109781340A CN 109781340 A CN109781340 A CN 109781340A CN 201910059540 A CN201910059540 A CN 201910059540A CN 109781340 A CN109781340 A CN 109781340A
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Abstract
The invention discloses a kind of bit pressures and torque rating test device, it includes pedestal (1), long column (2), short column (3), platform (4), force-transmitting pole (5) and crossbeam (6), four root long columns (2) are installed on the top surface of the pedestal (1), the distribution of four root long column (2) rectangular arrays, crossbeam (6) are installed between four root long columns (2), crossbeam offers through-hole on (6), supporting positive cover (7) are installed in through-hole, being provided in supporting positive cover (7) can the force-transmitting pole (5) that slides up and down of supporting positive cover (7), hinge seat (8) are provided between the two root long columns (2) in left side, big pivoted arm (9) are hinged on hinge seat (8), chuck (10) are installed on pedestal (1) and immediately below force-transmitting pole (5)；It also discloses scaling method.The beneficial effects of the present invention are: promoting the measurement accuracy of downhole weight on bit and torque, have higher control precision and higher pressure test ability.
Description
Technical field
The present invention relates to a kind of bit pressures and torque rating test device and scaling method.
Background technique
It is accurate to obtain the drilling engineering parameters such as bit pressure, torque to reduction drilling risk and accident with highly important meaning
Justice, these parameters can generally be obtained by compound logging means.This kind of parameter got by compound logging is shallower in depth
Straight well in the case of it is relatively accurate, and in depth compared with true in deep, the more complicated wellbore of structure (two-dimentional wellbore, three-dimensional wellbore)
Reality and practicability are substantially reduced, and the engineering parameters such as ground bit pressure, surface torque that floor synthetic well logging obtains cannot accurately be known
Other underground unusual service condition (such as bit wear situation, bit damage situation, true bit pressure value), this is because being bored in drilling process
Column and borehole wall interaction process are complicated, and existing model and measurement method cannot be completely eliminated this interference.Therefore, it is orienting
It is accurate to obtain the most frequently used, most important drilling engineering ginseng in drilling engineering in the non-straight well drilling well such as well, horizontal well, extended reach well
Number is extremely urgent.
With the development of electronic measurement technique, so that the measurement of drilling engineering parameter gradually switchs to underground by ground survey
Measurement while drilling is possibly realized.The method of downhole drilling engineering parameter mainly uses underground survey pipe nipple (also known as underground work
Journey parameter measurement instrument) measurement while drilling is carried out, generally comprise downhole sensor, data collection system, downhole memory, ground data
Downhole sensor is usually measured bit pressure mounted in nearly drill bit position (or being directly installed on drill bit) by explanation and four part of processing system
With the engineering parameters such as torque.The pipe nipple also mountable different parts in drill string are measured, i.e. measurement is bored when being mounted on upper drilling string
Column running parameter, drilling engineering parameter is measured when connecing at nearly drill bit position, and measurement pipe nipple will not influence the normal work of drill string
Make, it can various engineering parameters under real-time measurement drill string operating status.Currently, major part underground engineering parameter measurement both domestic and external
Instrument can all realize that underground acquisition, downhole stored are synchronous with transmission data are bored and execute, and store the data measured in drilling process
Data readback and MWD transmission are carried out in the memory of underground, while by MWD by real-time data transmission to ground, after trip-out
Data compare and analyze, and can effectively avoid the problem of data transmission distortion is brought.Currently, foreign countries have underground of good performance
Engineering parameter measuring tool, domestic technique are not mature enough.External measuring tool is suitable for environmental pressure 140MPa, environment temperature
150 DEG C, can survey bit pressure (axial force), torque, moment of flexure, revolving speed, 3-axis acceleration, mud pressure inside and outside drill string, bit pressuredrop and
The many kinds of parameters such as temperature, intelligence degree is high, and data acquisition and processing (DAP) amount is big, and measurement accuracy is high, and measured data has drilling well
Important directive significance, but it is expensive.
Summary of the invention
The purpose of the present invention is to overcome the shortcomings of the existing technology, provide it is a kind of it is compact-sized, method is simple, under winding shaft
The measurement accuracy of bit pressure and torque has bit pressure and torque the calibration examination of higher control precision and higher pressure test ability
Experiment device and scaling method.
The purpose of the present invention is achieved through the following technical solutions: a kind of bit pressure and torque rating test device, it includes
Pedestal, long column, short column, platform, force-transmitting pole and crossbeam, are installed with four root long columns on the top surface of the pedestal, and four
Long column rectangular array is distributed, and is installed with crossbeam between four root long columns, through-hole is offered on crossbeam, is installed with and helps in through-hole
Positive set, be provided in supporting positive cover can the force-transmitting pole that slides up and down of supporting positive cover, be arranged between the two root long columns in left side hinged
Chain seat, is hinged with big pivoted arm on hinge seat, on pedestal and is located at immediately below force-transmitting pole and is installed with chuck；The top table of the pedestal
It is fixedly provided with two short columns on face, short column is located at the front side of long column, and between two short columns and to be located at its top fixed
There is platform, the fixed hinge of left clamper and the fixed hinge of right clamper are installed on the top surface of platform.
The long column and short column are each perpendicular to pedestal setting.
The method of experimental rig the calibration bit pressure and torque, it includes bit pressure calibration and torque calibration；
Bit pressure calibration the following steps are included:
S1, first underground engineering parameter measuring instrument is installed between chuck and force-transmitting pole, and underground engineering parameter is measured
Instrument is fixed, and big pivoted arm is pressed on force-transmitting pole at this time, and power transmission force-transmitting pole is transferred force to again at the top of underground engineering parameter measuring instrument；
S2, the data acquisition board and data acquisition computer that underground engineering parameter measuring instrument is connected using data readback line,
It is communicated by powered through USB interface of computer, and by serial ports with computer foundation；
S3, underground engineering parameter measuring instrument foil gauge bridge output voltage is measured using 8 Semi-digital multimeters, and recorded
Software data, to test bit pressure output zero point；
S4, big pivoted arm right part suspended weights be 1000kg or 2000kg counterweight A, place 2~3h, observation drift
Situation measures underground engineering parameter measuring instrument foil gauge bridge output voltage, and logging software number using 8 Semi-digital multimeters
According to being carried out just if without obvious drift to test underground engineering parameter measuring instrument bit pressure foil gauge bridge with the presence or absence of drift
Formula adds Unloading Calibration；
S5, big pivoted arm right end by 1,2,3 gradually hang counterweight A, until adding enough required counterweight A quantity,
Every time plus counterweight A uses the bit pressure foil gauge bridge output of 8 Semi-digital multimeter measurement underground engineering parameter measuring instruments electric
Pressure, and logging software data；
S6, the counterweight A for gradually removing big pivoted arm right end remove counterweight A every time and use 8 until being only left 1 counterweight A
Position Semi-digital multimeter measures underground engineering parameter measuring instrument bit pressure foil gauge bridge output voltage, and logging software data；
There are tri- stress points of A, B, C on S7, big pivoted arm, if big pivoted arm is measured in the gravity G and underground engineering parameter of counterweight A
The suffered lower balance of bit pressure WOB effect on instrument, has according to lever Interval static analysis:
G × AC=WOB × AB, wherein AB is A stress point to the spacing between B stress point, and AC is A stress point to C stress
Spacing between point, above formula is converted to obtain the bit pressure WOB being applied on underground engineering parameter measuring instrument are as follows:
S8, linear fit is carried out to the output voltage digital signal of record and the bit pressure WOB of application, it is defeated that bit pressure can be obtained
Zero datum value and corresponding conversion relational expression out；
Torque calibration the following steps are included:
S1, first underground engineering parameter measuring instrument is clamped between the fixed hinge of left clamper and the fixed hinge of right clamper, and
Small pivoted arm is fixed into underground engineering parameter measuring instrument one end, at this time twisting resistance of the underground engineering parameter measuring instrument by small pivoted arm；
S2, the data acquisition board and data acquisition computer that underground engineering parameter measuring instrument is connected using data readback line,
It is communicated by powered through USB interface of computer, and by serial ports with computer foundation；
S3, underground engineering parameter measuring instrument torque foil gauge bridge output voltage is measured using 8 Semi-digital multimeters, and
Logging software data, to test torque output zero point；
S4, small pivoted arm free end suspended weights be 500kg counterweight B, place 2~3h, observation drift situation, use
8 Semi-digital multimeters measure underground engineering parameter measuring instrument torque foil gauge bridge output voltage, and logging software data, with
Underground engineering parameter measuring instrument torque foil gauge bridge is tested with the presence or absence of drift, carries out formal plus unloads if without obvious drift
Carry calibration；
S5, counterweight B is gradually hung by 1,2,3 in the free end of small pivoted arm, until adding enough required counterweight B number
Amount, every time plus counterweight B uses 8 Semi-digital multimeter measurement underground engineering parameter measuring instrument torque foil gauge bridge output electricity
Pressure, and logging software data；
S6, the counterweight B for gradually removing small pivoted arm right end remove counterweight B every time and use 8 until being only left 1 counterweight B
Position Semi-digital multimeter measures underground engineering parameter measuring instrument torque foil gauge bridge output voltage, and logging software data；
By D, E two points stress on S7, small pivoted arm, if small pivoted arm is in the gravity G and underground engineering parameter measuring instrument of counterweight B
The upper lower balance of suffered torque T OB effect, DE and horizontal position angle are θ, then according to lever Interval static analysis, are applied to underground
Torque T OB on engineering parameter measuring instrument are as follows:
TOB=G × DE × cos θ, wherein DE is D stress point to the spacing between E stress point；
S8, linear fit is carried out to the output voltage digital signal of record and the torque of application, torque output can be obtained
Zero datum value and corresponding conversion relational expression.
The invention has the following advantages that structure of the invention is compact, method is simple, promotes downhole weight on bit and the measurement essence of torque
Degree has higher control precision and higher.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the right view of Fig. 1；
Fig. 3 is the top view of Fig. 1；
Fig. 4 is the operation schematic diagram of bit pressure calibration；
Fig. 5 is the operation schematic diagram of torque calibration；
Fig. 6 is the right view of Fig. 5；
Fig. 7 is bit pressure calibration result figure；
Fig. 8 is torque calibration result figure.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing, and protection scope of the present invention is not limited to as described below:
As shown in Figures 1 to 3, a kind of bit pressure and torque rating test device, it include pedestal 1, long column 2, short column 3,
Platform 4, force-transmitting pole 5 and crossbeam 6, four root long columns 2 are installed on the top surface of the pedestal 1, and four root long columns 2 are in rectangle battle array
Column distribution is installed with crossbeam 6 between four root long columns 2, through-hole is offered on crossbeam 6, supporting positive cover 7, righting are installed in through-hole
Be provided in set 7 can the force-transmitting pole 5 that slides up and down of supporting positive cover 7, be provided with hinge seat 8 between the two root long columns 2 in left side,
It is hinged with big pivoted arm 9 on hinge seat 8, on pedestal 1 and is located at the underface of force-transmitting pole 5 and is installed with chuck 10；The top of the pedestal 1
It is fixedly provided with two short column 3 on surface, short column 3 is located at the front side of long column 2, between two short column 3 and is located at its top
Portion is installed with platform 4, and the fixed hinge 11 of left clamper and the fixed hinge 12 of right clamper are installed on the top surface of platform 4.
The long column 2 and short column 3 are each perpendicular to the setting of pedestal 1.
The method of experimental rig the calibration bit pressure and torque, it includes bit pressure calibration and torque calibration；
Bit pressure calibration the following steps are included:
As shown in figure 4, S1, first underground engineering parameter measuring instrument 14 is installed between chuck 10 and force-transmitting pole 5, and by well
Lower engineering parameter measuring instrument 14 is fixed, and big pivoted arm 9 is pressed on force-transmitting pole 5 at this time, and power transmission force-transmitting pole 5 transfers force to underground work again
14 top of journey parameter measurement instrument；
S2, it is calculated using the data acquisition board and data acquisition of data readback line connection underground engineering parameter measuring instrument 14
Machine is communicated by powered through USB interface of computer, and by serial ports with computer foundation；
S3,14 foil gauge bridge output voltage of underground engineering parameter measuring instrument is measured using 8 Semi-digital multimeters, and remembered
Recording software data, to test bit pressure output zero point；
S4, big pivoted arm 9 right part suspended weights be 1000kg or 2000kg counterweight A13, place 2~3h, observation
Drift situation measures 14 foil gauge bridge output voltages of underground engineering parameter measuring instrument using 8 Semi-digital multimeters, and records
Software data, to test 14 bit pressure foil gauge bridge of underground engineering parameter measuring instrument with the presence or absence of drift, if without obvious drift
It then carries out formally adding Unloading Calibration；
S5, big pivoted arm 9 right end by 1,2,3 gradually hang counterweight A13, until adding enough required counterweight A number
Amount, every time plus counterweight A uses the bit pressure foil gauge bridge of 8 Semi-digital multimeter measurement underground engineering parameter measuring instruments 14 defeated
Voltage out, and logging software data；
S6, the counterweight A for gradually removing big 9 right end of pivoted arm remove counterweight A every time and use 8 until being only left 1 counterweight A
Position Semi-digital multimeter measures 14 bit pressure foil gauge bridge output voltage of underground engineering parameter measuring instrument, and logging software data；
There are tri- stress points of A, B, C on S7, big pivoted arm 9, if big pivoted arm 9 is in the gravity G and underground engineering parameter of counterweight A13
The suffered lower balance of bit pressure WOB effect on measuring instrument 14, has according to lever Interval static analysis:
G × AC=WOB × AB, wherein AB is A stress point to the spacing between B stress point, and AC is A stress point to C stress
Spacing between point, above formula is converted to obtain the bit pressure WOB being applied on underground engineering parameter measuring instrument 14 are as follows:
S8, linear fit is carried out to the output voltage digital signal of record and the bit pressure WOB of application, it is defeated that bit pressure can be obtained
Zero datum value and corresponding conversion relational expression out；
Torque calibration the following steps are included:
As shown in Fig. 5~6, underground engineering parameter measuring instrument 14 first S1, is clamped in the fixed hinge 11 of left clamper and right folder
Between the fixed hinge 12 of holder, and by the fixed small pivoted arm 15 in 14 one end of underground engineering parameter measuring instrument, underground engineering parameter is surveyed at this time
Measure twisting resistance of the instrument 14 by small pivoted arm 15；
S2, it is calculated using the data acquisition board and data acquisition of data readback line connection underground engineering parameter measuring instrument 14
Machine is communicated by powered through USB interface of computer, and by serial ports with computer foundation；
S3,14 torque foil gauge bridge output voltage of underground engineering parameter measuring instrument is measured using 8 Semi-digital multimeters,
And logging software data, to test torque output zero point；
S4, small pivoted arm 15 free end suspended weights be 500kg counterweight B16, place 2~3h, observation drift situation,
14 torque foil gauge bridge output voltage of underground engineering parameter measuring instrument, and logging software are measured using 8 Semi-digital multimeters
Data, to test 14 torque foil gauge bridge of underground engineering parameter measuring instrument with the presence or absence of drift, if without obvious drift into
Row formally adds Unloading Calibration；
S5, counterweight B16 is gradually hung by 1,2,3 in the free end of small pivoted arm 15, until adding enough required counterweight
B16 quantity, every time plus counterweight B uses 8 Semi-digital multimeter measurement 14 torque strain gage bridges of underground engineering parameter measuring instrument
Road output voltage, and logging software data；
S6, the counterweight B for gradually removing small 15 right end of pivoted arm remove counterweight B every time and use until being only left 1 counterweight B
8 Semi-digital multimeters measure 14 torque foil gauge bridge output voltage of underground engineering parameter measuring instrument, and logging software data；
By D, E two points stress on S7, small pivoted arm 15, if small pivoted arm 15 is in the gravity G and underground engineering parameter of counterweight B16
The suffered lower balance of torque T OB effect on measuring instrument 14, DE and horizontal position angle are θ, then according to lever Interval static analysis, apply
The torque T OB being added on underground engineering parameter measuring instrument 14 are as follows:
TOB=G × DE × cos θ, wherein DE is D stress point to the spacing between E stress point；
S8, linear fit is carried out to the output voltage digital signal of record and the torque of application, torque output can be obtained
Zero datum value and corresponding conversion relational expression.
Present invention utilizes underground engineering parameter measuring instruments to carry out precise measurement bit pressure and torque, thus significant increase underground
The measurement accuracy of bit pressure and torque has higher control precision and higher pressure test ability.
It is as follows that bit pressure torque demarcates embodiment:
Bit pressure calibration: being that 0~250kN situation is demarcated to bit pressure, the differential 2kN, that is, 0kN of load bit pressure, 2kN,
4kN ..., 250kN, calibration result is as shown in Figure 7.By calibration result it is found that underground engineering parameter measuring instrument is axially loaded
In the case of the linearity it is more satisfactory, the practical axial force load born of measuring instrument and measuring circuit output signal are regarded as line
Property, then the relationship in calibration experiment between bit pressure value WOB and voltage output digital signal n are as follows: WOB=0.5722 (n-nP0),
Wherein nP0=142.It should be understood that wherein nP0Digital quantity, it be underground engineering parameter measuring instrument bear bit pressure be 0 when
The digital quantity that measuring circuit is exported, referred to as measuring instrument bit pressure measure zero point.Scene is in use, measuring circuit exports digital quantity value
Sensor signal can be changed into bit pressure physical quantity after being converted according to above formula.
Torque calibration: being that 0~8kN-m situation is demarcated to torque value, the differential 0.2kN-m, that is, 0kN-m of load torque,
0.2kN-m, 0.4kN-m ..., 8kN-m, calibration result is as shown in Figure 8.By calibration result it is found that underground engineering parameter measures
The linearity of the instrument in the case where loading torque condition or more satisfactory, the practical torque load born of measuring instrument and measuring circuit are defeated
Signal is regarded as linear out, then the relationship in calibration experiment between torque T OB and output digital quantity n are as follows: T=0.0347
(n–nT0), wherein nT0=142.It should be understood that wherein nT0It is digital quantity, it is that underground engineering parameter measuring instrument bears to turn round
The digital quantity that square is exported by measuring circuit when 0, referred to as measuring instrument torque measurement zero point.Scene is in use, measuring circuit exports
Sensor signal can be changed into torque physical quantity after being converted according to above formula by digital quantity value.
The above, only presently preferred embodiments of the present invention not do limitation in any form to the present invention.It is any ripe
Those skilled in the art is known, without departing from the scope of the technical proposal of the invention, all using technology contents described above
Many possible changes and modifications or equivalent example modified to equivalent change are made to technical solution of the present invention.Therefore, all
It is the content without departing from technical solution of the present invention, any change modification made to the above embodiment of technology according to the present invention,
Equivalent variations and modification belong to the protection scope of the technical program.
Claims (3)
1. a kind of bit pressure and torque rating test device, it is characterised in that: it includes pedestal (1), long column (2), short column
(3), platform (4), force-transmitting pole (5) and crossbeam (6), are installed with four root long columns (2) on the top surface of the pedestal (1), and four
Long column (2) rectangular array is distributed, and is installed with crossbeam (6) between four root long columns (2), and crossbeam offers through-hole on (6), is led to
Be installed in hole supporting positive cover (7), be provided in supporting positive cover (7) can the force-transmitting pole (5) that slides up and down of supporting positive cover (7), be located at left side
Two root long columns (2) between be provided with hinge seat (8), be hinged on hinge seat (8) big pivoted arm (9), on pedestal (1) and be located at
Chuck (10) are installed with immediately below force-transmitting pole (5)；Two short column (3) is fixedly provided on the top surface of the pedestal (1), it is short
Column (3) is located at the front side of long column (2), between two short column (3) and is located at its top and is installed with platform (4), platform (4)
Top surface on be installed with the fixed hinge (11) of left clamper and the fixed hinge (12) of right clamper.
2. a kind of bit pressure according to claim 1 and torque rating test device, it is characterised in that: the long column (2)
Pedestal (1) setting is each perpendicular to short column (3).
3. the method for experimental rig calibration bit pressure and torque according to claims 1 to 2, it is characterised in that: it includes bit pressure
Calibration and torque calibration；
Bit pressure calibration the following steps are included:
S1, first underground engineering parameter measuring instrument (14) is installed between chuck (10) and force-transmitting pole (5), and underground engineering is joined
Number measuring instrument (14) is fixed, and big pivoted arm (9) is pressed on force-transmitting pole (5) at this time, and power transmission force-transmitting pole (5) transfers force to underground work again
At the top of journey parameter measurement instrument (14)；
S2, the data acquisition board and data acquisition computer that underground engineering parameter measuring instrument (14) are connected using data readback line,
It is communicated by powered through USB interface of computer, and by serial ports with computer foundation；
S3, underground engineering parameter measuring instrument (14) foil gauge bridge output voltage is measured using 8 Semi-digital multimeters, and recorded
Software data, to test bit pressure output zero point；
S4, big pivoted arm (9) right part suspended weights be 1000kg or 2000kg counterweight A (13), place 2~3h, observation
Drift situation measures underground engineering parameter measuring instrument (14) foil gauge bridge output voltages using 8 Semi-digital multimeters, and remembers
Recording software data, to test underground engineering parameter measuring instrument (14) bit pressure foil gauge bridge with the presence or absence of drift, if without obvious
Drift then carries out formally adding Unloading Calibration；
S5, big pivoted arm (9) right end by 1,2,3 gradually hang counterweight A (13), until adding enough required counterweight A number
Amount adds counterweight A to use the bit pressure foil gauge bridge of 8 Semi-digital multimeters measurements underground engineering parameter measuring instrument (14) every time
Output voltage, and logging software data；
S6, the counterweight A for gradually removing big pivoted arm (9) right end remove counterweight A every time and use 8 until being only left 1 counterweight A
Semi-digital multimeter measures underground engineering parameter measuring instrument (14) bit pressure foil gauge bridge output voltage, and logging software data；
There are tri- stress points of A, B, C on S7, big pivoted arm (9), if big pivoted arm (9) is joined in the gravity G and underground engineering of counterweight A (13)
The suffered lower balance of bit pressure WOB effect on number measuring instrument (14), has according to lever Interval static analysis:
G × AC=WOB × AB, wherein AB is spacing of the A stress point to B stress point, and AC is spacing of the A stress point to C stress point,
Above formula is converted to obtain the bit pressure WOB being applied on underground engineering parameter measuring instrument (14) are as follows:
S8, linear fit is carried out to the output voltage digital signal of record and the bit pressure WOB of application, bit pressure output zero can be obtained
Point a reference value and corresponding conversion relational expression；
Torque calibration the following steps are included:
S1, underground engineering parameter measuring instrument (14) is first clamped in the fixed hinge (11) of left clamper and the fixed hinge (12) of right clamper
Between, and by the fixed small pivoted arm (15) in underground engineering parameter measuring instrument (14) one end, underground engineering parameter measuring instrument (14) at this time
Twisting resistance by small pivoted arm (15)；
S2, the data acquisition board and data acquisition computer that underground engineering parameter measuring instrument (14) are connected using data readback line,
It is communicated by powered through USB interface of computer, and by serial ports with computer foundation；
S3, underground engineering parameter measuring instrument (14) torque foil gauge bridge output voltage is measured using 8 Semi-digital multimeters, and
Logging software data, to test torque output zero point；
S4, small pivoted arm (15) free end suspended weights be 500kg counterweight B (16), place 2~3h, observation drift situation,
Underground engineering parameter measuring instrument (14) torque foil gauge bridge output voltage is measured using 8 Semi-digital multimeters, and is recorded soft
Number of packages evidence, to test underground engineering parameter measuring instrument (14) torque foil gauge bridge with the presence or absence of drift, if without obvious drift
It then carries out formally adding Unloading Calibration；
S5, counterweight B (16) gradually are hung by 1,2,3 in the free end of small pivoted arm (15), until adding enough required counterweight B
(16) quantity, every time plus counterweight B uses 8 Semi-digital multimeter measurement underground engineering parameter measuring instrument (14) torque foil gauges
Bridge output voltage, and logging software data；
S6, the counterweight B for gradually removing small pivoted arm (15) right end remove counterweight B every time and use 8 until being only left 1 counterweight B
Position Semi-digital multimeter measures underground engineering parameter measuring instrument (14) torque foil gauge bridge output voltage, and logging software number
According to；
By D, E two points stress on S7, small pivoted arm (15), if small pivoted arm (15) is joined in the gravity G and underground engineering of counterweight B (16)
The suffered lower balance of torque T OB effect on number measuring instrument (14), DE and horizontal position angle are θ, then former according to lever standing balance
Reason, the torque T OB being applied on underground engineering parameter measuring instrument (14) are as follows:
TOB=G × DE × cos θ, wherein DE is D stress point to the spacing between E stress point；
S8, linear fit is carried out to the output voltage digital signal of record and the torque of application, torque output zero point can be obtained
A reference value and corresponding conversion relational expression.
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| CN114017012A (en) * | 2021-10-29 | 2022-02-08 | 中国石油天然气集团有限公司 | Calibration device for underground bit pressure torque measurement nipple |
| CN114046930A (en) * | 2021-10-29 | 2022-02-15 | 中国石油天然气集团有限公司 | Calibration method for underground weight-on-bit torque measurement nipple |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017012A (en) * | 2021-10-29 | 2022-02-08 | 中国石油天然气集团有限公司 | Calibration device for underground bit pressure torque measurement nipple |
| CN114046930A (en) * | 2021-10-29 | 2022-02-15 | 中国石油天然气集团有限公司 | Calibration method for underground weight-on-bit torque measurement nipple |
| CN114017012B (en) * | 2021-10-29 | 2022-08-23 | 中国石油天然气集团有限公司 | Calibration device for underground bit pressure torque measurement nipple |
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