CN101737019A - Release packer capable of well-flushing - Google Patents
Release packer capable of well-flushing Download PDFInfo
- Publication number
- CN101737019A CN101737019A CN200910231368A CN200910231368A CN101737019A CN 101737019 A CN101737019 A CN 101737019A CN 200910231368 A CN200910231368 A CN 200910231368A CN 200910231368 A CN200910231368 A CN 200910231368A CN 101737019 A CN101737019 A CN 101737019A
- Authority
- CN
- China
- Prior art keywords
- joint
- sleeve
- sliding sleeve
- cone
- seat
- 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
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 17
- 238000012856 packing Methods 0.000 claims abstract description 32
- 238000005406 washing Methods 0.000 claims description 14
- 241000309551 Arthraxon hispidus Species 0.000 claims description 9
- 238000004026 adhesive bonding Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005520 cutting process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
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Abstract
The invention discloses a release packer capable of well-flushing, which comprises an upper joint, a piston, a hydraulic cylinder, a separating joint, an ejector sleeve, a packing valve ball, a packing valve seat, a packing shear pin, a lock ring, a junk sub, a connected pipe, an inner pipe, an unset shear pin, an upper rubber cylinder joint, a rubber cylinder shaft, a rubber cylinder, a lower rubber cylinder joint, an upper cone, a slip sleeve, a slip, a lower cone, and a stop joint; wherein the lower cone is provided with a communicated hole and internally provided with a sliding sleeve; the sliding sleeve is positioned above the communicated hole and fixed on the lower cone; the upper part of the sliding sleeve is provided with an upper seal ring, and the lower part of the sliding sleeve is provided with a lower seal ring; a pin is positioned between the upper seal ring and the lower seal ring; a cut-off valve ball is located in the upper port of the sliding sleeve; and the diameter of the cut-off valve ball is smaller than the inner diameter of the packing valve seat. Before packing, the reverse well flushing can be carried out on an oil pipe on the packer so as to wash way sundries in the oil pipe and ensure that a packing pressure is transferred to the piston, the packer can be reliably packed and the well flushing can successfully realize oil production by layer, thereby the invention has obvious economic benefit.
Description
Technical field
The present invention is the laminated distributor under well oil tool of oil field oil recovery usefulness, particularly a kind of release packer capable of well-flushing.
Background technology
Implement layering card water blockoff oil recovery technique, envelope is fallen high aquifer, is the effective way that the control well water rises.Layering card water blockoff will adopt packer, and existing packer kind is more, but has that easy inefficacy, downslide, supporting capacity are low, the construction success rate is low and problem such as deblocking difficulty.It is to suppress the seat envelope after bringing it into the oil reservoir position by oil pipe that there is one type packer at the scene, and then oil pipe separated with packer, realize that this process scene is called and give up, such packer is in order to adapt to hydraulic base sealed requirement, the tubing string of it and its bottom is airtight, inner liquid can not come out, outside liquid can not be entered, therefore, can not carry out clean-out service to tubing string after the following completion, cause the foreign material blocking channel in the tubing string, make the pressure transmission less than on the piston, can not finish the action that needs, packer can not seal by seat, can not realize the purpose of oil production by layer.
Summary of the invention
The objective of the invention is to design a kind of release packer capable of well-flushing, can carry out well-flushing to tubing string, the seat envelope is reliable, realizes oil production by layer.
The object of the present invention is achieved like this: by top connection, piston, hydraulic cylinder, separating joint, ejector sleeve, seat envelope valve ball, seat envelope valve seat, seat envelope shear pin, lock ring, fishing joint, the connection pipe, interior pipe, the deblocking shear pin, gluing socket joint head, the packing element axle, packing element, the lower rubber cylinder joint, upper cone, slip sleeve, slips, lower cone, the retaining joint is formed, the top connection lower external thread is connected with hydraulic cylinder top, the top connection lower internal thread is connected with separating joint top, between hydraulic cylinder and the separating joint piston is installed, it under the piston ejector sleeve, ejector sleeve is connected by seat envelope shear pin with fishing joint, internal thread is arranged at fishing joint top, the ejector sleeve bottom is connected with the connection pipe, between ejector sleeve bottom and the connection pipe lock ring is arranged, lock ring has interior unidirectional screw thread, manage outside the top in fishing joint is sleeved on, interior pipe is outside to have unidirectional screw thread also can to interlock with the interior unidirectional screw thread of lock ring, the separating joint bottom is that left hand thread is connected with interior pipe, seat envelope valve seat base part seat is in interior pipe on the shoulder, seat envelope valve seat outer wall and separating joint inwall fitted seal, on the present envelope of the seat envelope valve ball seat valve seat upper port, fishing joint is connected by the deblocking shear pin with interior pipe, connection pipe bottom is connected with gluing socket joint head, gluing socket joint head suspension packing element axle, the packing element axle sleeve is contained in outside the interior pipe, suit packing element on the packing element axle, glue tube base is on the lower rubber cylinder joint, packing element axle bottom is connected with the upper cone upper internal threaded, be connected with the upper cone upper external thread on the lower rubber cylinder joint, slip sleeve is suspended on the upper cone, lower cone is installed in the slip sleeve, between upper cone and the lower cone slips is installed, interior pipe bottom is connected with lower cone top, the retaining joint is connected with the slip sleeve bottom, lower cone is suspended on the retaining joint, lower cone is provided with linked hole, sliding sleeve is installed in the lower cone, sliding sleeve is on the linked hole, sliding sleeve by dowel fixes on lower cone, sealing ring is installed on sliding sleeve top, lower seal is installed in the sliding sleeve bottom, pin is in sealing ring, between the lower seal, the shut off valve ball seat drops on the sliding sleeve upper port, closes the internal diameter of the diameter of valve ball less than seat envelope valve seat.
The invention has the beneficial effects as follows: can carry out reverse well-flushing to the oil pipe on the packer before the seat envelope, foreign material in the oil pipe can be washed away, guarantee that the seat seal pressure is delivered on the piston, but packer energy seat envelope, make oil well successfully realize oil production by layer, have remarkable economic efficiency.
Description of drawings
Accompanying drawing 1 is the assembling drawing of the embodiment of the invention.
Accompanying drawing 2 is the profiles after cutting open from A-A in the accompanying drawing 1.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described.
Embodiments of the invention are by top connection 1, piston 2, hydraulic cylinder 3, separating joint 4, ejector sleeve 5, seat envelope valve ball 6, seat envelope valve seat 7, seat envelope shear pin 8, lock ring 9, fishing joint 10, connection pipe 11, interior pipe 12, deblocking shear pin 13, gluing socket joint head 14, packing element axle 15, packing element 16, lower rubber cylinder joint 17, upper cone 18, slip sleeve 19, slips 20, close valve ball 21, last sealing ring 22, retaining joint 24, pin 25, lower seal 26, lower cone 28 is formed, top connection 1 lower external thread is connected with hydraulic cylinder 3 tops, top connection 1 lower internal thread is connected with separating joint 4 tops, piston 2 is installed between hydraulic cylinder 3 and the separating joint 4, it under the piston 2 ejector sleeve 5, ejector sleeve 5 is connected by seat envelope shear pin 8 with fishing joint 10, internal thread is arranged at fishing joint 10 tops, ejector sleeve 5 bottoms are connected with connection pipe 11, between ejector sleeve 5 bottoms and the connection pipe 11 lock ring 9 is arranged, lock ring 9 has interior unidirectional screw thread, manage outside 12 tops in fishing joint 10 is sleeved on, there is unidirectional screw thread interior pipe 12 outsides and can interlocks with the interior unidirectional screw thread of lock ring 9, separating joint 4 bottoms are connected for left hand thread with interior pipe 12, seat envelope valve seat 7 base part seats are in interior pipe 12 on the shoulder, seat envelope valve seat 7 outer walls and separating joint 4 inwall fitted seal, fishing joint 10 is connected by deblocking shear pin 13 with interior pipe 12, connection pipe 11 bottoms are connected with gluing socket joint head 14, gluing socket joint head 14 hangs packing element axle 15, manage outside 12 in packing element axle 15 is sleeved on, suit packing element 16 on the packing element axle 15,16 of packing elements are on lower rubber cylinder joint 17, packing element axle 15 bottoms are connected with upper cone 18 upper internal threaded, be connected with upper cone 18 upper external thread on the lower rubber cylinder joint 17, slip sleeve 19 is suspended on the upper cone 18, lower cone 28 is installed in the slip sleeve 19, slips 20 is installed between upper cone 18 and the lower cone 28, interior pipe 12 bottoms are connected with lower cone 28 tops, retaining joint 24 is connected with slip sleeve 19 bottoms, lower cone 28 is suspended on the retaining joint 24, lower cone 28 is provided with well washing hole 27, sliding sleeve 23 is installed in the lower cone 28, sliding sleeve 23 is on the well washing hole 27, sliding sleeve 23 is fixed on the lower cone 28 by pin 25, sealing ring 22 is installed on sliding sleeve 23 tops, lower seal 26 is installed in sliding sleeve 23 bottoms, and pin 25 is in sealing ring 22, between the lower seal 26.
During well-flushing, squeeze into flushing fluid in sleeve pipe, flushing fluid enters upwards to flow out through well washing hole 27 foreign material is washed away.After well-flushing is finished, in oil pipe, drop into diameter and close valve ball 21 less than seat envelope valve seat 7 internal diameters, close valve ball 21 and pass a seat envelope valve seat 7 and fall to sliding sleeve 23 upper port, inwardly suppress, hydraulic coupling promotes sliding sleeve 23, pin 25 is cut off, sliding sleeve 23 descending covering well washing holes 27, last sealing ring 22 is on well washing hole 27 and the pin 25, and lower seal 26 is on the well washing hole 27, in can not entering from well washing hole 27, well liquid in the pipe 12, do not guarantee next step realization oil production by layer.
During the seat envelope, seat is sealed valve ball 6 to be dropped in the oil pipe, seat envelope valve ball 6 falls on seat envelope valve seat 7 upper port, inwardly suppress, hydraulic pressure imports into to piston 2 from the linked hole on the separating joint 4, make ejector sleeve 5 a descending envelope shear pin 6 of cutting off, it is descending that ejector sleeve is exercised upper cone 18 for 5 times, upper cone 18, distance shortening between the lower cone 28, promotion slips 20 is outwards mobile and card is firm on casing wall, ejector sleeve 5 continues descending, compression packing element 16 Sealed casing pipes meanwhile, are managed on 12 in lock ring 9 descending being buckled in, make slips 20 block the jail all the time on sleeve pipe after pressure disappears, packing element 16 is Sealed casing pipe all the time.
When giving up, the positive rotation oil pipe, because separating joint 4 bottoms and interior pipe 12 are for left hand thread is connected, therefore, thread off with interior pipe 12 connecting threads and separate in separating joint 4 bottoms, and separating joint 4 is tripped out, and other parts are stayed in the well and are produced.
During salvaging, be lowered to fisher and connect with fishing joint 10 upper internal threaded on the back and carry, deblocking shear pin 13 is broken, and fishing joint 10 is thrown off with interior pipe 12, and the distance between upper cone 18, the lower cone 28 increases, and slips 20 is regained, and packing element 16 is regained, and realizes deblocking.
Claims (1)
1. release packer capable of well-flushing, by top connection (1), piston (2), hydraulic cylinder (3), separating joint (4), ejector sleeve (5), seat envelope valve ball (6), seat envelope valve seat (7), seat envelope shear pin (8), lock ring (9), fishing joint (10), connection pipe (11), interior pipe (12), deblocking shear pin (13), gluing socket joint head (14), packing element axle (15), packing element (16), lower rubber cylinder joint (17), upper cone (18), slip sleeve (19), slips (20), retaining joint (24), lower cone (28) is formed, top connection (1) lower external thread is connected with hydraulic cylinder (3) top, top connection (1) lower internal thread is connected with separating joint (4) top, between hydraulic cylinder (3) and the separating joint (4) piston (2) is installed, under the piston (2) ejector sleeve (5), ejector sleeve (5) is connected by seat envelope shear pin (8) with fishing joint (10), internal thread is arranged at fishing joint (10) top, ejector sleeve (5) bottom is connected with connection pipe (11), between ejector sleeve (5) bottom and the connection pipe (11) lock ring (9) is arranged, lock ring (9) has interior unidirectional screw thread, fishing joint (10) is sleeved on outside interior pipe (12) top, there is unidirectional screw thread interior pipe (12) outside and can interlocks with the interior unidirectional screw thread of lock ring (9), separating joint (4) bottom is connected for left hand thread with interior pipe (12), seat envelope valve seat (7) base part seat is in interior pipe (12) on the shoulder, seat envelope valve seat (7) outer wall and separating joint (4) inwall fitted seal, fishing joint (10) is connected by deblocking shear pin (13) with interior pipe (12), connection pipe (11) bottom is connected with gluing socket joint head (14), gluing socket joint head (14) hangs packing element axle (15), packing element axle (15) is sleeved on outside the interior pipe (12), packing element axle (15) is gone up suit packing element (16), packing element (16) seat is on lower rubber cylinder joint (17), packing element axle (15) bottom is connected with upper cone (18) upper internal threaded, lower rubber cylinder joint (17) is gone up and is connected with upper cone (18) upper external thread, slip sleeve (19) is suspended on the upper cone (18), lower cone (28) is installed in the slip sleeve (19), between upper cone (18) and the lower cone (28) slips (20) is installed, interior pipe (12) bottom is connected with lower cone (28) top, retaining joint (24) is connected with slip sleeve (19) bottom, lower cone (28) is suspended on the retaining joint (24), it is characterized in that: lower cone (28) is provided with well washing hole (27), sliding sleeve (23) is installed in the lower cone (28), sliding sleeve (23) is on the well washing hole (27), sliding sleeve (23) is fixed on the lower cone (28) by pin (25), sealing ring (22) is installed on sliding sleeve (23) top, lower seal (26) is installed in sliding sleeve (23) bottom, pin (25) is in sealing ring (22), between the lower seal (26), during well-flushing, in sleeve pipe, squeeze into flushing fluid, flushing fluid enters upwards to flow out through well washing hole (27) foreign material is washed away, in oil pipe, drop into diameter and close valve ball (21) less than what seat sealed valve seat (7) internal diameter, closing valve ball (21) passes a seat envelope valve seat (7) and falls to sliding sleeve (23) upper port, inwardly suppress, hydraulic coupling promotes sliding sleeve (23), pin (25) is cut off, the descending covering well washing hole of sliding sleeve (23) (27), last sealing ring (22) is on well washing hole (27) and the pin (25), lower seal (26) is on the well washing hole (27), and well liquid can not enter in the interior pipe (12) from well washing hole (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910231368A CN101737019B (en) | 2009-12-02 | 2009-12-02 | Release packer capable of well-flushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910231368A CN101737019B (en) | 2009-12-02 | 2009-12-02 | Release packer capable of well-flushing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101737019A true CN101737019A (en) | 2010-06-16 |
| CN101737019B CN101737019B (en) | 2012-09-05 |
Family
ID=42460989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910231368A Active CN101737019B (en) | 2009-12-02 | 2009-12-02 | Release packer capable of well-flushing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101737019B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321624A (en) * | 2013-07-09 | 2013-09-25 | 中国石油集团渤海钻探工程有限公司 | Threaded sliding sleeve with ball seat capable of being taken out |
| CN103437738A (en) * | 2013-08-27 | 2013-12-11 | 山东拓普石油装备有限公司 | Slip type integrated descaling device with downhole packing and throttling functions |
| CN103790547A (en) * | 2014-02-11 | 2014-05-14 | 中国石油集团西部钻探工程有限公司 | Suspended packer device |
| CN104420846A (en) * | 2013-08-27 | 2015-03-18 | 深圳市百勤石油技术有限公司 | Suspension packer |
| CN106761541A (en) * | 2017-03-28 | 2017-05-31 | 中国石油大学(北京) | A kind of Hydraulic Anchorage sealing device |
| CN107869320A (en) * | 2016-09-23 | 2018-04-03 | 中国石油化工股份有限公司 | Anti- return of one kind tells flushing valve |
| CN108487879A (en) * | 2017-12-20 | 2018-09-04 | 高云东 | A kind of oil layer protection flushing packer |
| CN108999589A (en) * | 2018-07-26 | 2018-12-14 | 中国石油大学(华东) | A kind of workover treatment downhole blow-out preventer |
| CN109209286A (en) * | 2018-10-20 | 2019-01-15 | 东营百华石油技术开发有限公司 | A kind of packer of oil well filling sand control |
| CN109296346A (en) * | 2018-10-21 | 2019-02-01 | 东营百华石油技术开发有限公司 | A kind of sand control pack device that can be anti-sticking |
| CN109296337A (en) * | 2018-10-19 | 2019-02-01 | 东营百华石油技术开发有限公司 | Full-bore exempts to bore plug hook-up for cementing |
| CN110424922A (en) * | 2019-08-05 | 2019-11-08 | 中国石油天然气股份有限公司 | A kind of nonmetallic anchoring packer anti-flushing well method |
| CN114109289A (en) * | 2020-08-31 | 2022-03-01 | 中国石油化工股份有限公司 | Oil-water well washes debris collection device |
| CN116556878A (en) * | 2023-05-24 | 2023-08-08 | 东营市福利德石油科技开发有限责任公司 | Packer capable of being set and unset repeatedly |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU582943B2 (en) * | 1986-02-07 | 1989-04-13 | Halliburton Company | Single zone gravel packing system |
| US5343949A (en) * | 1992-09-10 | 1994-09-06 | Halliburton Company | Isolation washpipe for earth well completions and method for use in gravel packing a well |
| CN2368973Y (en) * | 1999-01-22 | 2000-03-15 | 孔利生 | Packer |
| CN201214986Y (en) * | 2007-12-07 | 2009-04-01 | 王杰林 | Anti-pollution well washing oil extraction device |
| RU2370632C1 (en) * | 2008-03-17 | 2009-10-20 | Геннадий Иосифович Геймаш | Method of casing well with liner |
-
2009
- 2009-12-02 CN CN200910231368A patent/CN101737019B/en active Active
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321624B (en) * | 2013-07-09 | 2016-04-20 | 中国石油集团渤海钻探工程有限公司 | A desirable ball seat sliding sleeve of screw-type |
| CN103321624A (en) * | 2013-07-09 | 2013-09-25 | 中国石油集团渤海钻探工程有限公司 | Threaded sliding sleeve with ball seat capable of being taken out |
| CN103437738A (en) * | 2013-08-27 | 2013-12-11 | 山东拓普石油装备有限公司 | Slip type integrated descaling device with downhole packing and throttling functions |
| CN104420846A (en) * | 2013-08-27 | 2015-03-18 | 深圳市百勤石油技术有限公司 | Suspension packer |
| CN103437738B (en) * | 2013-08-27 | 2016-11-16 | 山东拓普石油装备有限公司 | A kind of slip-type underground packing and the comprehensive apparatus for eliminating sludge that throttles |
| CN103790547A (en) * | 2014-02-11 | 2014-05-14 | 中国石油集团西部钻探工程有限公司 | Suspended packer device |
| CN103790547B (en) * | 2014-02-11 | 2016-06-22 | 中国石油集团西部钻探工程有限公司 | hanging packer device |
| CN107869320A (en) * | 2016-09-23 | 2018-04-03 | 中国石油化工股份有限公司 | Anti- return of one kind tells flushing valve |
| CN106761541B (en) * | 2017-03-28 | 2023-01-24 | 中国石油大学(北京) | Hydraulic anchoring sealing device |
| CN106761541A (en) * | 2017-03-28 | 2017-05-31 | 中国石油大学(北京) | A kind of Hydraulic Anchorage sealing device |
| CN108487879A (en) * | 2017-12-20 | 2018-09-04 | 高云东 | A kind of oil layer protection flushing packer |
| CN108999589A (en) * | 2018-07-26 | 2018-12-14 | 中国石油大学(华东) | A kind of workover treatment downhole blow-out preventer |
| CN109296337A (en) * | 2018-10-19 | 2019-02-01 | 东营百华石油技术开发有限公司 | Full-bore exempts to bore plug hook-up for cementing |
| CN109209286A (en) * | 2018-10-20 | 2019-01-15 | 东营百华石油技术开发有限公司 | A kind of packer of oil well filling sand control |
| CN109296346A (en) * | 2018-10-21 | 2019-02-01 | 东营百华石油技术开发有限公司 | A kind of sand control pack device that can be anti-sticking |
| CN110424922A (en) * | 2019-08-05 | 2019-11-08 | 中国石油天然气股份有限公司 | A kind of nonmetallic anchoring packer anti-flushing well method |
| CN110424922B (en) * | 2019-08-05 | 2021-09-28 | 中国石油天然气股份有限公司 | Non-metal anchoring packer backwashing method |
| CN114109289A (en) * | 2020-08-31 | 2022-03-01 | 中国石油化工股份有限公司 | Oil-water well washes debris collection device |
| CN114109289B (en) * | 2020-08-31 | 2024-01-30 | 中国石油化工股份有限公司 | Oil-water well flushing sundry collecting device |
| CN116556878A (en) * | 2023-05-24 | 2023-08-08 | 东营市福利德石油科技开发有限责任公司 | Packer capable of being set and unset repeatedly |
| CN116556878B (en) * | 2023-05-24 | 2023-12-26 | 东营市福利德石油科技开发有限责任公司 | Packer capable of being set and unset repeatedly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101737019B (en) | 2012-09-05 |
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Owner name: DONGYING BAIHUA PETROLEUM TECHNOLOGY DEVELOPMENT C Free format text: FORMER OWNER: YU HAITAO Effective date: 20120702 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Shang Juntao Inventor after: Zhou Na Inventor after: Zhang Tao Inventor after: Shi Hongyan Inventor after: Su Yubo Inventor after: Gao Lijun Inventor after: Zhang Shenglin Inventor before: Zhou Na Inventor before: Zhang Tao Inventor before: Wang Jun Inventor before: Liu Jiajiu Inventor before: Bai Tao |
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Free format text: CORRECT: INVENTOR; FROM: ZHOU NA ZHANG TAO WANG JUN LIU JIAJIU XUE TAO TO: SHANG JUNTAO ZHOU NA ZHANG TAO SHI HONGYAN SU YUBO GAO LIJUN ZHANG SHENGLIN |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20120702 Address after: 2-115 mailbox, Shengli oil production plant, Dongying, Shandong 257051 Applicant after: Dongying Baihua Petroleum Technology Development Co., Ltd. Address before: 999 mailbox, North 257051, Shengli Oilfield, Shandong, Dongying Applicant before: Yu Haitao |
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| C14 | Grant of patent or utility model | ||
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Washable well release packer Effective date of registration: 20220525 Granted publication date: 20120905 Pledgee: Dongying laishang Village Bank Co.,Ltd. New Area sub branch Pledgor: DONGYING BAIHUA PETROLEUM TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2022980006357 |
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