CN101429866A - Wing rib telescopic while-drilling density logger - Google Patents
Wing rib telescopic while-drilling density logger Download PDFInfo
- Publication number
- CN101429866A CN101429866A CNA2007101143021A CN200710114302A CN101429866A CN 101429866 A CN101429866 A CN 101429866A CN A2007101143021 A CNA2007101143021 A CN A2007101143021A CN 200710114302 A CN200710114302 A CN 200710114302A CN 101429866 A CN101429866 A CN 101429866A
- Authority
- CN
- China
- Prior art keywords
- density
- drill collar
- drilling
- detector
- rib
- 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.)
- Granted
Links
Landscapes
- Geophysics And Detection Of Objects (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention relates to the rib-expansible density logging while drilling apparatus for use in the petroleum drilling industry. A density detector pup joint and a gamma radioactive source are sealed and arranged on a drill collar. An expandable rib is arranged on the surface of the drill collar at position of a groove, and the groove and the density detector pup joint are arranged at an interval of about 120 degrees in a circumferential direction. The expandable rib relies on a piston assembly to extend outward under the action of pressure drop (difference between inner pressure and outer pressure) generated due to instruments such as a drill bit (and a motor) arranged at the lower part of the apparatus and presses the detector pup joint against a well wall on a corresponding side by using counterforce of the well wall to realize density measurement by the well wall. And when a pump stops, the expandable rib retracts under the action of a return spring. The rib-expansible density logging while drilling apparatus is applicable to various wells, ensures measurement by the well wall, overcomes influence of slurry, mud cake or complex well structure on measurement precision, improves underground safety and is applicable to logging while drilling and geosteering drilling.
Description
Technical field:
The present invention relates to a kind of measurement while-drilling instrument that is used for the oil drilling industry.Specifically, the present invention relates to a kind of while-drilling density logger that can reduce the well-drilling borehole influence.
Background technology:
Be applicable to that in petroleum industry in well logging during and the geologic steering drilling, while-drilling density logger is used at drilling process, real-time measuring well is the degree of porosity of exclosure layer near the eyes, thereby seeks the purpose hydrocarbon formations, improves the rate of oil and gas recovery.
Densilog instrument generally includes 1 gamma radioactive source, 2 gamma detector and corresponding electronic circuits apart from gamma radioactive source different distance are formed.Because density log is subjected to the influence of well (as mud, mud cake) bigger, therefore requires instrument to be close to the borehole wall and measure, thereby can utilize the influence of double source apart from probe compensation mud cake.Though not having mud cake with boring in the density log, along with the rotation of drill collar, drill collar stabilizer and drill mud gap is arranged between the stratum can be similar to and regard light mud cake as.Therefore the greatest problem of density log is how to reduce the influence of well to measurement result.
Present known while-drilling density logger adopts drill collar formula mounting structure usually, and gamma radioactive source and double source are installed in the stabilizer of drill collar outer wall apart from probe.The borehole diameter of stabilizer diameter and design is basic identical, thereby realizes the measurement of the density instrument subsides borehole wall, utilizes the software compensation computational methods again, reduces the influence of well to measurement result.The instrument that has also is furnished with ultrasonic caliper on this basis, and hole diameter information is provided, and uses for measurement update.
There is following shortcoming in the while-drilling density logger of this frame mode:
Though at first the borehole diameter of stabilizer diameter and design is basic identical, borehole diameter is not constant.When the continuous erosion owing to mud makes certain section borehole diameter become big, produce the gap between gamma radioactive source and probe and the borehole wall, mud can exert an influence to measurement, measure error occurs; When causing borehole diameter to diminish owing to the formation lithology variation, then be stuck in easily on the borehole wall in the stabilizer part, cause lock of tool drilling, instrument can't be salvaged when serious, and radioactive source is stayed the down-hole and is polluted the stratum.
When secondly rotating in the down-hole owing to drill collar is not placed in the middle all the time, but approximate irregular ellipse, and the influence that changed by well, its movement locus is more complicated, can't guarantee all the time that instrument pastes the borehole wall and measures, even therefore adopt caliper and software compensation computational methods etc., also can't guarantee certainty of measurement.
Summary of the invention:
The objective of the invention is for a kind of oil drilling industry that is used for is provided, and can reduce the Wing rib telescopic while-drilling density logger of well-drilling borehole influence, can be in drilling process in real time, the accurate measuring well degree of porosity of exclosure layer near the eyes.Compared with prior art, overcome the influence to certainty of measurement such as mud, mud cake and bad hole structure, improved the safety that instrument uses.
The present invention is achieved in that at the drill collar middle part surface and vertically has the probe mounting groove, and the density detector pipe nipple is put into wherein, and pushed down by the probe cover plate and to be fixed on the drill collar.Short space gamma detector, long space gamma detector, detection circuit module are installed respectively in the density detector pipe nipple from top to bottom, and the gamma ray shielding slab all are installed in the upper and lower both sides of short space gamma detector.On density detector pipe nipple outer surface and probe cover plate, all have detection window over against short space gamma detector and long space gamma detector place, and be fixed, seal with the detection window sealing-plug.The active storehouse of drill collar Surface Machining above the probe mounting groove, radioactive source is positioned over wherein, and with storehouse, source sealing-plug it is sealed.Probe cover plate and gamma ray shielding slab are made by the material that gamma ray is had absorption, and storehouse, source sealing-plug and detection window sealing-plug are by gamma ray there not being the material of absorption make.Be inlaid with high-abrasive material on probe cover plate surface.On drill collar, respectively have a groove with the probe mounting groove 120 ° of positions that about circumferencial direction, are separated by, on each groove, have three holes that communicate with the drill collar inner chamber, piston assembly is installed therein, and on each groove, respectively inlay a flexible rib, each flexible rib up and down concave surface place is respectively installed a return spring, and pressing plate is in the return spring outer face and be fixed on the drill collar.Water conservancy diversion cover assembly is installed in drill collar inner chamber top, and the leaded end of water conservancy diversion cover assembly is connected to the density detector pipe nipple.
The beneficial effect that while-drilling density logger of the present invention has is, can be applicable to different wells, guarantee that instrument pastes the borehole wall and measures, overcome the influence of mud, mud cake and bad hole structure certainty of measurement, and improve the safety of instrument in the down-hole, be applicable to geologic steering drilling.
The present invention is further described below in conjunction with drawings and Examples.
Description of drawings:
Fig. 1 represents the structural representation of " Wing rib telescopic while-drilling density logger ";
1, drill collar 2, water conservancy diversion cover assembly 3, pressing plate 4, return spring
5, flexible rib 6, piston assembly 7, storehouse, source 8, radioactive source
9, storehouse, source sealing-plug 10, probe cover plate 11, detection window sealing-plug
12, short space gamma detector 13, gamma ray shielding slab 14, long space gamma detector
15, detection circuit module 16, density detector pipe nipple 17, probe mounting groove
The specific embodiment:
Now, the present invention is further described in conjunction with Figure of description 1.
Vertically have a U-lag at drill collar 1 middle part surface, as probe mounting groove 17, density detector pipe nipple 16 is put into wherein, and and there is not the gap between the probe mounting groove 17 substantially, push down by probe cover plate 10 and to be fixed on the drill collar 1, make instrument damage to prevent vibration and impact in the drilling process.Short space gamma detector 12, long space gamma detector 14, detection circuit module 15 are installed respectively in the density detector pipe nipple 16 from top to bottom, and gamma ray shielding slab 13 all is installed in the upper and lower both sides of short space gamma detector 12, their available glue is fixed in the skeleton, and skeleton integral body is put into probe mounting groove 17.
On density detector pipe nipple 16 outer surfaces and probe cover plate 10, all have detection window over against short space gamma detector 12 and long space gamma detector 14 places, and be fixed, seal with detection window sealing-plug 11.The active storehouse 7 of drill collar 1 Surface Machining above probe mounting groove 17, radioactive source 8 is positioned over wherein, and radioactive source 8 can adopt
137Cs, storehouse, source 7 inwalls and storehouse, source sealing-plug 9 are processed with screw thread, so useful source storehouse sealing-plug 9 is with its sealing, fixing.Probe cover plate 10 and gamma ray shielding slab 13 are made by the material that gamma ray is had absorption, storehouse, source sealing-plug 9 and detection window sealing-plug 11 are by gamma ray there not being the material of absorption make, the purpose of doing like this is gamma detector only to be received by radioactive source send, and the gamma ray that comes through the stratum.Because therefore the damage easily with wall friction of the explorer portion of this part, is inlaid with high-abrasive material, to increase its abrasion resistance on probe cover plate 10 surfaces.
In order to realize the object of the invention, should make density detector pipe nipple 16 paste the borehole wall, thereby and there is not mud between the borehole wall, therefore, on drill collar 1, respectively have a groove with the probe mounting groove 17 120 ° of positions that about circumferencial direction, are separated by, on each groove, have three holes that communicate with drill collar 1 inner chamber, piston assembly 6 is installed therein, and on each groove, respectively inlays a flexible rib 5, be inlaid with high-abrasive material on flexible rib 5 surfaces.A return spring 4 is respectively installed at the concave surface place on each flexible rib 5, and an end of return spring 4 contacts with the concave surface at flexible rib 5 two ends, and the other end contacts with pressing plate 3, and pressing plate 3 is fixed on the drill collar 1.
Water conservancy diversion cover assembly 2 is installed in drill collar 1 top inner chamber, and water conservancy diversion cover assembly 2 bottoms are porose to communicate with probe mounting groove 17, and the lead end of water conservancy diversion cover assembly 2 bottoms can be connected to density detector pipe nipple 16.By the lead end on water conservancy diversion cover assembly 2 tops, this instrument can be connected with Other Instruments.
During use, instrument is installed in bottom drill bit upper tool part such as (and motors).In drilling process, under the turn on pump situation, under pressure drop (inside and outside differential pressure) effect that instrument bottom drill bit instruments such as (and motors) produces, two flexible ribs 5 are by the pressure transfer function of piston assembly 6, the elastic force that overcomes return spring 4 is protruding, be formed on the supporting surface that well week upwards is mutually 120 °, when their contact boreholes wall, because the reaction force of the borehole wall, with 16 backups of density detector pipe nipple to the borehole wall of a relative side, the maximum gauge of instrument equals the diameter of well substantially at this moment, and then radioactive source and two gamma detectors contact with the borehole wall, realizes pasting borehole wall density measure.Under the situation of termination of pumping, flexible rib 5 is regained under the effect of return spring 4, limited when retreating to the step place of flexible rib 5 inboards, at this moment the instrument diameter is less than borehole diameter, thus can not occur in adopt built-in stabilizer with boring the lock of tool drilling that occurs in the density instrument.
Claims (5)
1, Wing rib telescopic while-drilling density logger, comprise: drill collar (1), probe mounting groove (17), density detector pipe nipple (16), storehouse, source (7), radioactive source (8), storehouse, source sealing-plug (9), probe cover plate (10), flexible rib (5), piston assembly (6), return spring (4), pressing plate (3), water conservancy diversion cover assembly (2), it is characterized in that: vertically have probe mounting groove (17) at drill collar (1) middle part surface, density detector pipe nipple (16) is installed on wherein, and push down by probe cover plate (10) and to be fixed on the drill collar (1), the active storehouse of drill collar (1) Surface Machining (7) in probe mounting groove (17) top, radioactive source (8) is installed on wherein, and with storehouse, source sealing-plug (9) with its sealing, on drill collar (1), respectively have a groove with probe mounting groove (17) the 120 ° of positions that about circumferencial direction, are separated by, on each groove, have three holes that communicate with drill collar (1) inner chamber, piston assembly (6) is installed therein, and on each groove, respectively inlay a flexible rib (5), each flexible rib (5) is gone up the concave surface place return spring (4) respectively is installed, pressing plate (3) is in return spring (4) outer face and be fixed on the drill collar (1), water conservancy diversion cover assembly (2) is installed in drill collar (1) inner chamber top, and the leaded end of water conservancy diversion cover assembly (2) is connected to density detector pipe nipple (16).
2, as right 1 described Wing rib telescopic while-drilling density logger, it is characterized in that: short space gamma detector (12), long space gamma detector (14), detection circuit module (15) are installed respectively in the density detector pipe nipple (16) from top to bottom, and gamma ray shielding slab (13) are installed in the upper and lower both sides of short space gamma detector (12).
3, as right 1 described Wing rib telescopic while-drilling density logger, it is characterized in that: on density detector pipe nipple (16) outer surface and probe cover plate (10), locate all to have detection window over against short space gamma detector (12) and long space gamma detector (14), and be fixed, seal with detection window sealing-plug (11).
4, as right 1 described Wing rib telescopic while-drilling density logger, it is characterized in that: probe cover plate (10) and gamma ray shielding slab (13) are made by the material that gamma ray is had absorption, and storehouse, source sealing-plug (9) and detection window sealing-plug (11) are by gamma ray there not being the material of absorption make.
5, as right 1 described Wing rib telescopic while-drilling density logger, it is characterized in that: be inlaid with high-abrasive material at probe cover plate (10) and flexible rib (5) surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101143021A CN101429866B (en) | 2007-11-08 | 2007-11-08 | Wing rib telescopic while-drilling density logger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101143021A CN101429866B (en) | 2007-11-08 | 2007-11-08 | Wing rib telescopic while-drilling density logger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101429866A true CN101429866A (en) | 2009-05-13 |
| CN101429866B CN101429866B (en) | 2012-11-21 |
Family
ID=40645480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101143021A Active CN101429866B (en) | 2007-11-08 | 2007-11-08 | Wing rib telescopic while-drilling density logger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101429866B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953689A (en) * | 2011-08-30 | 2013-03-06 | 中国石油化工股份有限公司 | Radioactive source bin and drill collar with same |
| CN103775067A (en) * | 2012-10-20 | 2014-05-07 | 中国石油化工股份有限公司 | Directional sound wave logging while drilling device |
| CN104500052A (en) * | 2014-11-27 | 2015-04-08 | 中国石油天然气集团公司 | Compensation density logging-while-drilling instrument |
| CN106522929A (en) * | 2016-12-07 | 2017-03-22 | 中国石油天然气集团公司 | Ultrasound well diameter during-drilling well logging device |
| CN106710656A (en) * | 2016-12-27 | 2017-05-24 | 中国石油天然气集团公司 | Source storage container structure used for small-diameter radioactive instrument |
| CN107178362A (en) * | 2017-07-26 | 2017-09-19 | 中国石油大学(华东) | A kind of oil/gas drilling gas cut early detection device based on impedance bioelectrical measurement |
| CN110056341A (en) * | 2018-01-18 | 2019-07-26 | 中石化石油工程技术服务有限公司 | One kind is with brill controllable source density logging device |
| CN111119871A (en) * | 2018-10-31 | 2020-05-08 | 中石化石油工程技术服务有限公司 | Measuring device for measuring formation density value and measuring method thereof |
| CN111502572A (en) * | 2020-05-08 | 2020-08-07 | 长江大学 | Radial drilling and drilling control valve |
| CN111663939A (en) * | 2019-02-20 | 2020-09-15 | 中石化石油工程技术服务有限公司 | Device and method for measuring orientation density while drilling |
| CN111691879A (en) * | 2020-05-20 | 2020-09-22 | 中海油田服务股份有限公司 | Stratum whiplash evaluation method |
| CN113494242A (en) * | 2020-04-02 | 2021-10-12 | 中国石油化工股份有限公司 | Rotary guide tool and use method thereof |
| CN114151020A (en) * | 2021-12-10 | 2022-03-08 | 山东省地质矿产勘查开发局第七地质大队（山东省第七地质矿产勘查院） | Hydraulic ring geological drilling device |
| CN114482993A (en) * | 2022-01-26 | 2022-05-13 | 斯伦贝谢油田技术（山东）有限公司 | Salvageable logging-while-drilling tool device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6850168B2 (en) * | 2000-11-13 | 2005-02-01 | Baker Hughes Incorporated | Method and apparatus for LWD shear velocity measurement |
| CN1676871A (en) * | 2004-04-02 | 2005-10-05 | 中海石油（中国）有限公司天津分公司 | Series combined logging instrument |
| CN201170095Y (en) * | 2007-11-08 | 2008-12-24 | 中国石化集团胜利石油管理局钻井工艺研究院 | Wing rib telescopic density logger following with drilling |
-
2007
- 2007-11-08 CN CN2007101143021A patent/CN101429866B/en active Active
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953689A (en) * | 2011-08-30 | 2013-03-06 | 中国石油化工股份有限公司 | Radioactive source bin and drill collar with same |
| CN102953689B (en) * | 2011-08-30 | 2014-12-10 | 中国石油化工股份有限公司 | Radioactive source bin and drill collar with same |
| CN103775067A (en) * | 2012-10-20 | 2014-05-07 | 中国石油化工股份有限公司 | Directional sound wave logging while drilling device |
| CN103775067B (en) * | 2012-10-20 | 2016-08-31 | 中国石油化工股份有限公司 | With boring orientation acoustic logging device |
| CN104500052A (en) * | 2014-11-27 | 2015-04-08 | 中国石油天然气集团公司 | Compensation density logging-while-drilling instrument |
| CN106522929A (en) * | 2016-12-07 | 2017-03-22 | 中国石油天然气集团公司 | Ultrasound well diameter during-drilling well logging device |
| CN106522929B (en) * | 2016-12-07 | 2020-01-07 | 中国石油天然气集团公司 | Ultrasonic borehole diameter logging-while-drilling device |
| CN106710656A (en) * | 2016-12-27 | 2017-05-24 | 中国石油天然气集团公司 | Source storage container structure used for small-diameter radioactive instrument |
| CN107178362A (en) * | 2017-07-26 | 2017-09-19 | 中国石油大学(华东) | A kind of oil/gas drilling gas cut early detection device based on impedance bioelectrical measurement |
| CN110056341A (en) * | 2018-01-18 | 2019-07-26 | 中石化石油工程技术服务有限公司 | One kind is with brill controllable source density logging device |
| CN111119871A (en) * | 2018-10-31 | 2020-05-08 | 中石化石油工程技术服务有限公司 | Measuring device for measuring formation density value and measuring method thereof |
| CN111119871B (en) * | 2018-10-31 | 2023-12-26 | 中国石油化工集团有限公司 | Measuring device and measuring method for measuring stratum density value |
| CN111663939A (en) * | 2019-02-20 | 2020-09-15 | 中石化石油工程技术服务有限公司 | Device and method for measuring orientation density while drilling |
| CN111663939B (en) * | 2019-02-20 | 2024-05-07 | 中国石油化工集团有限公司 | Direction density measurement while drilling device and measurement method thereof |
| CN113494242A (en) * | 2020-04-02 | 2021-10-12 | 中国石油化工股份有限公司 | Rotary guide tool and use method thereof |
| CN111502572A (en) * | 2020-05-08 | 2020-08-07 | 长江大学 | Radial drilling and drilling control valve |
| CN111691879A (en) * | 2020-05-20 | 2020-09-22 | 中海油田服务股份有限公司 | Stratum whiplash evaluation method |
| CN111691879B (en) * | 2020-05-20 | 2024-02-06 | 中海油田服务股份有限公司 | Stratum whipability evaluation method |
| CN114151020A (en) * | 2021-12-10 | 2022-03-08 | 山东省地质矿产勘查开发局第七地质大队（山东省第七地质矿产勘查院） | Hydraulic ring geological drilling device |
| CN114151020B (en) * | 2021-12-10 | 2023-09-08 | 山东省地质矿产勘查开发局第七地质大队（山东省第七地质矿产勘查院） | Hydraulic circular geological drilling device |
| CN114482993A (en) * | 2022-01-26 | 2022-05-13 | 斯伦贝谢油田技术（山东）有限公司 | Salvageable logging-while-drilling tool device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101429866B (en) | 2012-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101429866B (en) | Wing rib telescopic while-drilling density logger | |
| CA2554261C (en) | Probe isolation seal pad | |
| US11814908B2 (en) | Formation tester tool | |
| US6896074B2 (en) | System and method for installation and use of devices in microboreholes | |
| US8408331B2 (en) | Downhole downlinking system employing a differential pressure transducer | |
| CN1013288B (en) | Radioactive well measuring device | |
| CN1676874A (en) | Well deflection and position gamma measuring nistrument during drilling | |
| CN202215225U (en) | Device for petroleum drilling pressure and torsion measurement while drilling | |
| CN102839969A (en) | Device for bit pressure/torque measurement while drilling in oil drilling | |
| US4941350A (en) | Method and apparatus for formation testing | |
| CN102839963A (en) | While-drilling pressure torque gauging nipple | |
| CN202220597U (en) | Measurement pipe nipple for drilling pressure and torque while drilling | |
| US4480186A (en) | Compensated density well logging tool | |
| CN201170095Y (en) | Wing rib telescopic density logger following with drilling | |
| CN1131416C (en) | Strain monitoring system | |
| CN205422694U (en) | Formation pressure rapid survey appearance | |
| US7954252B2 (en) | Methods and apparatus to determine and use wellbore diameters | |
| WO2022240908A1 (en) | Method and apparatus for fracture width measurement | |
| GB2328746A (en) | Determining the shape of an earth borehole and measuring the acoustic velocity in the earth formation | |
| US6552334B2 (en) | Wellbore caliper measurement method using measurements from a gamma-gamma density | |
| CN108457639B (en) | Rotating speed measuring sensor suitable for deep well | |
| CN215057318U (en) | Near-bit well deviation measurement while drilling instrument | |
| CN213331046U (en) | Down-hole drilling flow switch | |
| CN215565908U (en) | Pressure-while-drilling hole diameter measuring unit | |
| CN108343422B (en) | Rotation speed sensor of downhole power machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SINOPEC OILFIELD SERVICE CORPORATION Free format text: FORMER OWNER: WELL-DRILLING TECHNOLOGY INST., SHENGLI PETROLEUM ADMINISTRATION, SINOPEC Effective date: 20150325 Owner name: CHINA PETROLEUM + CHEMICAL VICTORY OIL ENGINEERING Effective date: 20150325 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 257017 DONGYING, SHANDONG PROVINCE TO: 100029 CHAOYANG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150325 Address after: 100029 Beijing City, Chaoyang District Hui Street No. six twelfth floor Patentee after: SINOPEC OILFIELD SERVICE CORPORATION Patentee after: Drilling Well Technology Institute, Shengli Petroleum Engineering Co., Ltd., SINOPEC Address before: 257017 No. 236, North Road, Dongying District, Shandong, Dongying Patentee before: Well-Drilling Technology Inst., Shengli Petroleum Administration, SINOPEC |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220216 Address after: 100029 Chaoyang District, Beijing Hui Xin Street six, Twelfth level. Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee after: Sinopec Jingwei Co.,Ltd. Patentee after: Geological measurement and Control Technology Research Institute of Sinopec Jingwei Co.,Ltd. Address before: 100029 Chaoyang District, Beijing Hui Xin Street six, Twelfth level. Patentee before: SINOPEC OILFIELD SERVICE Corp. Patentee before: Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Co., Ltd |