CN102562035A - Underground engineering parameter measurement-while-drilling device - Google Patents
Underground engineering parameter measurement-while-drilling device Download PDFInfo
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- CN102562035A CN102562035A CN2012100084741A CN201210008474A CN102562035A CN 102562035 A CN102562035 A CN 102562035A CN 2012100084741 A CN2012100084741 A CN 2012100084741A CN 201210008474 A CN201210008474 A CN 201210008474A CN 102562035 A CN102562035 A CN 102562035A
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Abstract
The invention relates to an underground engineering parameter measurement-while-drilling device, which is used for measuring drill pressure, torsion, pressure in a drill columns and annular pressure while drilling and comprises a testing spindle. Resistance strain gauges, a measuring circuit board, an annular pressure sensor and a pipe internal pressure sensor are fixed on the testing spindle; the resistance strain gauges form a plurality of electric bridges which are connected with the measuring circuit board, and the annular pressure sensor and the pipe internal pressure sensor are communicated with corresponding oil storage devices to sense change of oil pressure, and are connected with the measuring circuit board; and a centralizing tube is disposed in the testing spindle, a battery barrel is placed in the centralizing tube, a hollow screw and a power switch are disposed along a radial direction of the testing spindle, a lead is connected with the measuring circuit board, the battery barrel and the power switch, and the measuring circuit board records, stores and uploads data. Measuring components are mounted inside and outside the testing spindle, self movement components are omitted, working conditions of a bit and a drill are reflected directly, the data are reliable, and accuracy is high.
Description
Technical field
The instrument that uses when the invention belongs to oil and gas well drilling is specifically related to a kind of oil and gas well drilling down-hole engineering parameter measurement while drilling device.
Background technology
In oil and gas well drilling work; No matter be to bore directional well, horizontal well; Or straight well, in order to control drilling well better, the ground surface works technician needs better to understand engineering parameter---the pressure of the drill, moment of torsion, flexural stress, drill string internal pressure and the annular pressure etc. of down-hole.
In the at present domestic and international wellbore construction process; The method of obtaining down-hole engineering parameters such as the pressure of the drill, moment of torsion, flexural stress, drill string internal pressure and annular pressure can be divided into that ground (or nearly well head) obtains indirectly, the down-hole directly obtains two kinds, and the method that its indirect is obtained is because cost is low and the most commonly used.Measurement and understanding to the pressure of the drill mainly are to utilize the ground weight indicator, but the data of ground survey reagentia really the pressure of the drill on drill bit; To the measurement of moment of torsion, be on wellhead assembly or motor shaft, to carry out, more not the action torque at drill bit place; To engineering parameters such as annular pressure, flexural stresses, ground can't be understood especially.Along with the development of hyundai electronics measuring technique, various sensors and data processing equipment can obtain data and handle from the rugged environment of down-hole.Sensor and data processing equipment are tried one's best near drill bit, just can realize the measurement of the pressure of the drill, moment of torsion, flexural stress, drill string internal pressure and annular pressure.
Summary of the invention
To the problems referred to above, the object of the present invention is to provide a kind of down-hole engineering parameter measurement while drilling device that after going into well, can steadily measure the pressure of the drill, moment of torsion, drill string internal pressure and annular pressure.It not only can write down, store the pressure of the drill numerical value after going into well, and can share with downhole pulser survey data directly is transferred to ground.Make the ground surface works technician in time understand and grasp the practical working situation of underground drilling tool.And this measurement mechanism is simple in structure, and manufacturing cost is not high, and long working life helps improving the drilling technology level.
In order to achieve the above object and requirement; The present invention adopts following technical scheme: a kind of down-hole engineering parameter measurement while drilling device; A part that belongs to steering tool; It is characterized in that: comprise that one has the test main shaft of cavity, on the test main shaft, be fixed with resistance strain gage, measuring circuit plate and annular pressure sensor, pipe pressure sensor; Said resistance strain gage has multi-disc, forms a plurality of electric bridges and is connected with said measuring circuit plate, and said annular pressure sensor, pipe pressure sensor are communicated with corresponding Fuel Tanking Unit experiences the oil pressure variation, and is connected with said measuring circuit plate; Two said Fuel Tanking Units all have the pressure sensitive film; On the corresponding Fuel Tanking Unit of said annular pressure sensor; The pressure sensitive film is exposed in the outer annular space tubing string of test main shaft; On the corresponding Fuel Tanking Unit of said pipe pressure sensor, the pressure sensitive film is exposed in the cavity of test main shaft; In the cavity of said test main shaft, be provided with and set upright pipe, set upright and be placed with the battery tube in the pipe, to a hollow screw is set, lead passes hollow screw one end and connects said measuring circuit plate along said test main shaft diameter, and the other end connects said battery tube; Also the said test main shaft diameter in edge is to being provided with a power switch, and an end and said battery tube trigger to be connected, and the other end is connected with the measuring circuit plate through lead; Said measuring circuit plate links to each other with host computer.
Above-mentioned test main shaft is outer by the protection of protection housing, comprises that the Kazakhstan not protects half shell and protecting sheathing, is set in the outside of test main shaft successively.
Mill flatly in test main shaft a certain section outer rim, flat is fixed with resistance strain gage, measuring circuit plate and annular pressure sensor, pipe pressure sensor.
On above-mentioned annular pressure sensor, the pipe pressure sensor oil pressure sensing hole is arranged, link to each other with Fuel Tanking Unit through oil circuit.
Above-mentioned test main shaft inwall and set upright and be supported with the aerofoil profile centralizer between the pipe; Test main shaft two ends connect top connection and lower contact, and by its axial location of jump ring locking.
Usually, hollow screw, power switch pass centralizer.
Above-mentioned power switch comprises that one is fixed on the switch housing of test on the main shaft, adorns one group of rotating shaft in the switch housing, with switch housing setting-in radially; Dial top milling one step of rotating shaft, trigger switch one end next-door neighbour battery, the other end is positioned on the step, when dialling the rotating shaft rotation, touches trigger switch and battery and connects.
This device can be connected with mud pulse generator through special-purpose linkage, through mud pulse generator measuring-signal is sent to ground.
The present invention is owing to take above technical scheme, and it has the following advantages: 1, the present invention installs and measures parts inside and outside a test main shaft, and no autokinesis parts directly reflect drill bit and drilling tool working condition; 2, the present invention tests foil gauge is installed on the main shaft, and body can transmit the pressure of the drill, the torque load that normal drilling well is used, and utilizes foil gauge to form electric bridge measurement while drilling the pressure of the drill, moment of torsion, and data are reliable, and accuracy is high; 3, the present invention has two pressure sensors in test main shaft mounted inside, and the test lead of a pressure sensor is communicated with the outside of protection housing, with annular pressure under the measuring well; It is inner that the test lead of another one pressure sensor is communicated with the test main shaft, to measure the drill string pressure inside.Mud pressure passes to pressure sensor through the hydraulic oil of Fuel Tanking Unit with the variation of pressure, passes the signal along to the measuring circuit plate through connecting lead, writes down, stores or send to and upload device; 4, the present invention relies on the measuring circuit plate not only can write down, store data, can also upload data; 5, the present invention is simple in structure, goes into reliable operation behind the well, long service life.
Description of drawings
Fig. 1 is that the axis of no-feathering of apparatus of the present invention cuts open figure.
Fig. 2 is the sectional structural map that the annular pressure sensor is installed.
Fig. 3 is the sectional structural map of mounting pipe pressure sensor.
Fig. 4 is that adhering resistance strain sheets is formed a plurality of electric bridges, and the sectional structural map of hollow screw is installed.
Fig. 5 is the sectional structural map that power switch is installed.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is carried out detailed description.
The present invention mainly by test main shaft, protection housing, set upright pipe, measurement processing circuit, pressure sensor, resistance strain gage etc. and form; Through pressure sensor, the resistance strain gage of installing on the test main shaft; In real time to the measurement processing signal transmission circuit; Understand stress, and write down, understand, store, upload detecting information by the measurement processing circuit when the Pretesting main shaft.
Specifically, as shown in Figure 1, a certain section outer rim of test main shaft 1 milled flat, sheathed successively two Kazakhstan not (ha] f) protection half shell 2 and a protecting sheathing 3 as protecting.Because test main shaft 1 outer side milling is flat, institute in the space, is equipped with annular pressure sensor 4 so that it and Kazakhstan are not protected and left the space between half shell 2, and corresponding supporting Fuel Tanking Unit 5; Pipe pressure sensor 6 also is installed, and corresponding supporting Fuel Tanking Unit 7; Measuring circuit plate 8 also is installed.
Like Fig. 1, shown in 2, annular pressure sensor 4 is installed in the space, and it has an oil pressure sensing hole 41; Link to each other with Fuel Tanking Unit 5 through oil circuit 42, pressure sensitive film 51 is installed on the Fuel Tanking Unit 5, be exposed in the annular space tubing string; When annular pressure changed, pressure sensitive film 51 changed, and drove hydraulic pressure variation in the Fuel Tanking Unit 5; Oil circuit 42 is delivered to annular pressure sensor 4 with the hydraulic pressure variation, records annular pressure thus.Annular pressure sensor 4 links to each other with measuring circuit plate 8, will record signal and pass to measuring system.
As shown in Figure 3, the operating principle of pipe pressure sensor 6 and Fuel Tanking Unit 7 is with the annular pressure sensor, and only the pressure sensitive film 71 of Fuel Tanking Unit 7 is exposed in the cavity of test main shaft 1, is used for the testing tube internal pressure.
As shown in Figure 4, also be pasted with several resistance strain gages 9 on the flat horizontal surface of test main shaft 1, several foil gauges are formed a plurality of electric bridges, are connected with measuring circuit plate 8, write down, store and transmit a signal to and upload device.
As shown in Figure 1, place, test main shaft 1 axle center offers cavity, and interior dress is set upright pipe 10 and centralizer 11, and aerofoil profile centralizer 11 is supported on test main shaft 1 and sets upright between the pipe 10, plays radially damping and spacing effect; Set upright pipe 10 two ends be threaded top connection 12 and lower contact 13, and by jump ring 14 its axial locations of locking.In setting upright pipe 10, battery tube 15 is housed.One hollow screw 16 passes test main shaft 1 sidewall, and as the interface channel of lead, lead passes hollow screw 16, one ends and connects measuring circuit plate 8, and the other end connects battery tube 15.If hollow screw 16 passes a centralizer 11 simultaneously, will play the effect of axial limiting to this centralizer.
Simultaneously, a power switch 17 also passes test main shaft 1 sidewall, and as the power-on switch of battery tube 15, its principle is similar to flashlight.As shown in Figure 5, power switch 17 comprises that one radially is fixed on the switch housing 171 of test on the main shaft 1, and switch housing is adorned one group of rotating shaft 172 for 171 li, dial rotating shaft 172 and switch housing 171 radially setting-in in case dial rotating shaft 172 and deviate from.The top milling of dialling rotating shaft 172 has a step, and the toggle end of trigger switch 173 is positioned on the step, trigger end next-door neighbour battery.When dialling rotating shaft 172 rotations, will touch the toggle end when turning over the step place, the toggle end drives trigger end and battery conducting.Another terminals of power switch 17 link to each other with measuring circuit plate 8.If power switch 17 passes a centralizer 11 simultaneously, will play the effect of axial limiting to this centralizer.
During practical implementation, after test main shaft 1 machines, carry out the following assembly manipulation:
1) resistance strain gage 9 is sticked on the milling plane of test main shaft 1 outer rim, form a plurality of measuring bridges, measuring circuit plate 8 also is fixed on the milling plane of test main shaft 1, utilize lead that resistance strain gage 9 is connected with measuring circuit plate 8;
2) in advance with battery tube 15 be fixed to set upright the pipe 10 inside; Battery tube upper conductor is reserved, and centralizer 11 is fixed to sets upright pipe 10 outsides, utilizes upper and lower joint shutoff to set upright the pipe two ends then; Put into test main shaft 1 inside, by the axial location of jump ring 14 locking inner bodies;
3) assemble hollow screw 16, utilize lead that battery tube 15 is connected with measuring circuit plate 8;
4) assemble power switch 17, utilize lead that power switch 17 is connected with measuring circuit plate 8;
5) annular pressure sensor 4, pipe pressure sensor 6 and corresponding Fuel Tanking Unit 5,7 are installed, and each sensor is connected with measuring circuit plate 8;
6) all assemble with upper-part after, refill and join the Kazakhstan and not protect half shell 2, protecting sheathing 3; At last whole device is connected in the drill string, G.I.H promptly can carry out with boring parameter measurement; Measuring circuit plate 8 links to each other with host computer and can carry out data upload.
The foregoing description only is used to explain the present invention, and wherein the structure of each parts, connected mode etc. all can change to some extent, and every equivalents of on the basis of technical scheme of the present invention, carrying out and improvement all should not got rid of outside protection scope of the present invention.
Claims (9)
1. down-hole engineering parameter measurement while drilling device; A part that belongs to steering tool; It is characterized in that: comprise that one has the test main shaft of cavity, on the test main shaft, be fixed with resistance strain gage, measuring circuit plate and annular pressure sensor, pipe pressure sensor; Said resistance strain gage has multi-disc, forms a plurality of electric bridges and is connected with said measuring circuit plate, and said annular pressure sensor, pipe pressure sensor are communicated with corresponding Fuel Tanking Unit experiences the oil pressure variation, and is connected with said measuring circuit plate; Two said Fuel Tanking Units all have the pressure sensitive film; On the corresponding Fuel Tanking Unit of said annular pressure sensor; The pressure sensitive film is exposed in the outer annular space tubing string of test main shaft; On the corresponding Fuel Tanking Unit of said pipe pressure sensor, the pressure sensitive film is exposed in the cavity of test main shaft;
In the cavity of said test main shaft, be provided with and set upright pipe, set upright and be placed with the battery tube in the pipe, to a hollow screw is set, lead passes hollow screw one end and connects said measuring circuit plate along said test main shaft diameter, and the other end connects said battery tube; Also the said test main shaft diameter in edge is to being provided with a power switch, and an end and said battery tube trigger to be connected, and the other end is connected with the measuring circuit plate through lead;
Said measuring circuit plate links to each other with host computer.
2. down-hole as claimed in claim 1 engineering parameter measurement while drilling device; It is characterized in that: said test main shaft is outer by the protection of protection housing; Mill flatly in test main shaft a certain section outer rim, flat is fixed with resistance strain gage, measuring circuit plate and annular pressure sensor, pipe pressure sensor.
3. down-hole as claimed in claim 2 engineering parameter measurement while drilling device, it is characterized in that: said protection housing has the Kazakhstan not to protect half shell and protecting sheathing, is set in the outside of test main shaft successively.
4. like claim 1 or 2 or 3 described down-hole engineering parameter measurement while drilling devices, it is characterized in that: on said annular pressure sensor, the pipe pressure sensor oil pressure sensing hole is arranged, link to each other with Fuel Tanking Unit through oil circuit.
5. like claim 1 or 2 or 3 described down-hole engineering parameter measurement while drilling devices, it is characterized in that: said test main shaft inwall and set upright and be supported with the aerofoil profile centralizer between the pipe; Said test main shaft two ends connect top connection and lower contact, and by its axial location of jump ring locking.
6. down-hole as claimed in claim 5 engineering parameter measurement while drilling device, it is characterized in that: said hollow screw, power switch pass centralizer.
7. like claim 1 or 2 or 3 or 6 described down-hole engineering parameter measurement while drilling devices, it is characterized in that: said power switch comprises that one is fixed on the switch housing of test on the main shaft, adorns one group of rotating shaft in the switch housing, with switch housing setting-in radially; Dial top milling one step of rotating shaft, trigger switch one end next-door neighbour battery, the other end is positioned on the step, when dialling the rotating shaft rotation, touches trigger switch and battery and connects.
8. down-hole as claimed in claim 4 engineering parameter measurement while drilling device is characterized in that: said power switch comprises that one is fixed on the switch housing of test on the main shaft, adorns one group of rotating shaft in the switch housing, with switch housing setting-in radially; Dial top milling one step of rotating shaft, trigger switch one end next-door neighbour battery, the other end is positioned on the step, when dialling the rotating shaft rotation, touches trigger switch and battery and connects.
9. down-hole as claimed in claim 5 engineering parameter measurement while drilling device is characterized in that: said power switch comprises that one is fixed on the switch housing of test on the main shaft, adorns one group of rotating shaft in the switch housing, with switch housing setting-in radially; Dial top milling one step of rotating shaft, trigger switch one end next-door neighbour battery, the other end is positioned on the step, when dialling the rotating shaft rotation, touches trigger switch and battery and connects.
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| CN201210008474.1A CN102562035B (en) | 2012-01-12 | 2012-01-12 | Underground engineering parameter measurement-while-drilling device |
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| CN201210008474.1A CN102562035B (en) | 2012-01-12 | 2012-01-12 | Underground engineering parameter measurement-while-drilling device |
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| CN102562035A true CN102562035A (en) | 2012-07-11 |
| CN102562035B CN102562035B (en) | 2015-09-30 |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410500A (en) * | 2013-07-26 | 2013-11-27 | 西南石油大学 | MWD (monitoring while drilling) device and method for vibration of down-hole drill string |
| CN105443113A (en) * | 2014-08-29 | 2016-03-30 | 中国石油天然气股份有限公司 | Testing string for gas storage |
| CN105484742A (en) * | 2015-12-16 | 2016-04-13 | 中国石油天然气集团公司 | Multi-parameter logging while drilling apparatus |
| CN105756666A (en) * | 2016-05-04 | 2016-07-13 | 中国地质大学（武汉） | Downhole pressure detecting device |
| CN106014384A (en) * | 2016-06-30 | 2016-10-12 | 中国石油集团西部钻探工程有限公司 | Well deviation direction measuring short section |
| CN106761481A (en) * | 2016-12-19 | 2017-05-31 | 西南石油大学 | One kind automatically adjusts the pressure of the drill instrument |
| CN107503744A (en) * | 2016-06-14 | 2017-12-22 | 中国石油化工股份有限公司 | A kind of device of shaft bottom bit wear state monitoring while drilling |
| CN107503745A (en) * | 2016-06-14 | 2017-12-22 | 中国石油化工股份有限公司 | A kind of method of shaft bottom bit wear state monitoring while drilling |
| CN107829726A (en) * | 2017-12-14 | 2018-03-23 | 杭州丰禾石油科技有限公司 | A kind of connector for logging while drilling |
| CN108457639A (en) * | 2018-01-16 | 2018-08-28 | 中国地质大学（武汉） | A kind of rotating speed measuring sensor suitable for deep-well |
| CN108487898A (en) * | 2018-01-16 | 2018-09-04 | 中国地质大学（武汉） | A kind of shaft bottom speed probe based on centrifugal force |
| CN109779616A (en) * | 2019-01-22 | 2019-05-21 | 西南石油大学 | A kind of method of downhole weight on bit and torque measurement |
| CN109838231A (en) * | 2019-02-25 | 2019-06-04 | 中国地质科学院 | It is a kind of for geothermal deep well temperature reservoirs evaluation well in intelligent joint |
| CN110439543A (en) * | 2018-05-04 | 2019-11-12 | 史密斯国际有限公司 | For measuring the recording device of downhole parameters |
| CN110761777A (en) * | 2019-11-04 | 2020-02-07 | 中国海洋石油集团有限公司 | Pulse generator for well logging |
| CN111878035A (en) * | 2020-08-04 | 2020-11-03 | 西南石油大学 | Mechanical underground slurry diversion tool and method |
| CN112483073A (en) * | 2020-12-15 | 2021-03-12 | 贵州航天凯山石油仪器有限公司 | Multifunctional pressure gauge mounting device |
| CN112901139A (en) * | 2019-12-02 | 2021-06-04 | 中国石油化工股份有限公司 | Measurement while drilling device |
| CN113503155A (en) * | 2021-07-21 | 2021-10-15 | 中国科学院地质与地球物理研究所 | Multifunctional measurement system and measurement method for engineering parameters while drilling |
| CN114562255A (en) * | 2022-03-01 | 2022-05-31 | 杭州丰禾石油科技有限公司 | Underground bit pressure torque measurement while drilling instrument and underground bit pressure torque measurement method |
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| CN103410500A (en) * | 2013-07-26 | 2013-11-27 | 西南石油大学 | MWD (monitoring while drilling) device and method for vibration of down-hole drill string |
| CN105443113A (en) * | 2014-08-29 | 2016-03-30 | 中国石油天然气股份有限公司 | Testing string for gas storage |
| CN105484742B (en) * | 2015-12-16 | 2018-07-13 | 中国石油天然气集团公司 | A kind of multi-parameter logging while drilling apparatus |
| CN105484742A (en) * | 2015-12-16 | 2016-04-13 | 中国石油天然气集团公司 | Multi-parameter logging while drilling apparatus |
| CN105756666A (en) * | 2016-05-04 | 2016-07-13 | 中国地质大学（武汉） | Downhole pressure detecting device |
| CN107503744A (en) * | 2016-06-14 | 2017-12-22 | 中国石油化工股份有限公司 | A kind of device of shaft bottom bit wear state monitoring while drilling |
| CN107503745A (en) * | 2016-06-14 | 2017-12-22 | 中国石油化工股份有限公司 | A kind of method of shaft bottom bit wear state monitoring while drilling |
| CN106014384A (en) * | 2016-06-30 | 2016-10-12 | 中国石油集团西部钻探工程有限公司 | Well deviation direction measuring short section |
| CN106761481B (en) * | 2016-12-19 | 2018-11-13 | 西南石油大学 | A kind of automatic adjustment bit pressure tool |
| CN106761481A (en) * | 2016-12-19 | 2017-05-31 | 西南石油大学 | One kind automatically adjusts the pressure of the drill instrument |
| CN107829726A (en) * | 2017-12-14 | 2018-03-23 | 杭州丰禾石油科技有限公司 | A kind of connector for logging while drilling |
| CN108457639A (en) * | 2018-01-16 | 2018-08-28 | 中国地质大学（武汉） | A kind of rotating speed measuring sensor suitable for deep-well |
| CN108487898A (en) * | 2018-01-16 | 2018-09-04 | 中国地质大学（武汉） | A kind of shaft bottom speed probe based on centrifugal force |
| CN110439543A (en) * | 2018-05-04 | 2019-11-12 | 史密斯国际有限公司 | For measuring the recording device of downhole parameters |
| CN109779616A (en) * | 2019-01-22 | 2019-05-21 | 西南石油大学 | A kind of method of downhole weight on bit and torque measurement |
| CN109838231A (en) * | 2019-02-25 | 2019-06-04 | 中国地质科学院 | It is a kind of for geothermal deep well temperature reservoirs evaluation well in intelligent joint |
| CN109838231B (en) * | 2019-02-25 | 2022-09-06 | 中国地质科学院 | Intelligent joint in well for evaluating high-temperature reservoir of geothermal deep well |
| CN110761777B (en) * | 2019-11-04 | 2022-08-02 | 中国海洋石油集团有限公司 | Pulse generator for well logging |
| CN110761777A (en) * | 2019-11-04 | 2020-02-07 | 中国海洋石油集团有限公司 | Pulse generator for well logging |
| CN112901139B (en) * | 2019-12-02 | 2022-12-16 | 中国石油化工股份有限公司 | Measurement while drilling device |
| CN112901139A (en) * | 2019-12-02 | 2021-06-04 | 中国石油化工股份有限公司 | Measurement while drilling device |
| CN111878035A (en) * | 2020-08-04 | 2020-11-03 | 西南石油大学 | Mechanical underground slurry diversion tool and method |
| CN112483073A (en) * | 2020-12-15 | 2021-03-12 | 贵州航天凯山石油仪器有限公司 | Multifunctional pressure gauge mounting device |
| CN112483073B (en) * | 2020-12-15 | 2023-07-04 | 贵州航天凯山石油仪器有限公司 | Multifunctional pressure gauge mounting device |
| CN113503155A (en) * | 2021-07-21 | 2021-10-15 | 中国科学院地质与地球物理研究所 | Multifunctional measurement system and measurement method for engineering parameters while drilling |
| CN114562255A (en) * | 2022-03-01 | 2022-05-31 | 杭州丰禾石油科技有限公司 | Underground bit pressure torque measurement while drilling instrument and underground bit pressure torque measurement method |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Co-patentee after: Southwest Petroleum University Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation Co-patentee before: Southwest Petroleum University |
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Effective date of registration: 20210806 Address after: 100010 No. 25 North Main Street, Dongcheng District, Beijing, Chaoyangmen Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Patentee after: CNOOC RESEARCH INSTITUTE Co.,Ltd. Address before: 100010 No. 25 North Main Street, Dongcheng District, Beijing, Chaoyangmen Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. Patentee before: CNOOC RESEARCH INSTITUTE Co.,Ltd. Patentee before: SOUTHWEST PETROLEUM University |