CN102953706A - Washable well packer for realizing underground secondary setting - Google Patents
Washable well packer for realizing underground secondary setting Download PDFInfo
- Publication number
- CN102953706A CN102953706A CN201210529974XA CN201210529974A CN102953706A CN 102953706 A CN102953706 A CN 102953706A CN 201210529974X A CN201210529974X A CN 201210529974XA CN 201210529974 A CN201210529974 A CN 201210529974A CN 102953706 A CN102953706 A CN 102953706A
- Authority
- CN
- China
- Prior art keywords
- valve
- well
- sleeve
- flushing
- setting
- 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
Images
Abstract
The invention discloses a washable well packer for realizing underground secondary setting and relates to a packer. The packer comprises a well-washing mechanism, a sealing mechanism, a locking mechanism, a setting mechanism and a de-blocking mechanism, wherein the well-washing mechanism comprises an upper joint, a top sleeve, a well-washing valve and a sealing ring I; the sealing mechanism comprises an outer center pipe, three rubber cylinders, two separating rings and a sealing ring; the locking mechanism comprises a slip seat, a valving inner slip and a locking sleeve; the setting mechanism mainly comprises an upper piston, a lower piston, a valve seat and a setting valve; and the de-blocking mechanism is a de-blocking sleeve. Due to the adoption of the setting valve, after the upper piston finishes setting for one time, a valve sleeve travels upwards, a liquid inlet of the valve is opened, when the external liquid pressure reaches set value of a valve switch, liquid flow outside a pipe is filled into a hydraulic cavity of the lower piston through a liquid flow passage, secondary setting is realized, and the defects that the inner pressure and the outer pressure of a pipe post is are unbalanced, a casing pipe is easy to damage in a using process, de-blocking is difficultly operated or de-blocking cannot be operated in the prior art are overcome.
Description
Technical field
Technical scheme of the present invention relates to the packing of well, specifically a kind of well packer capable of flushing well of realizing that the down-hole secondary sets.
Background technology
In order to prevent that sand pipe laying post phenomenon from occuring, water injection well packer adopts the washing well formula more on the present oil field, such as Y341-114 type water injection packer, but this type of packer to set pressure low, through repeatedly well-flushing operation, easily cause the tubing string external and internal pressure unbalance, long term causes the packing element wriggling, seal failure occurs ahead of time, so that the packer lost of life.For addressing the above problem, following several method is arranged: 1. increase setting force by mending envelope technique.CN101008311 discloses the benefit envelope technique when K type downhole packer does not seal, and its shortcoming is and for fundamentally to solve the unbalance situation of tubing string external and internal pressure, technological operation is numerous and diverse and the effect cycle is not long; 2. at packer construction hydraulic anchor and hydraulic slip are set.Although adopt hydraulic anchor or hydraulic slip to reach the effect of equilibrium pressure, cause the packer complicated integral structure, make difficulty, use cost is very high, and easily causes the damage to sleeve pipe.3. by cutting off the packer of pin deblocking.In use owing to the requirement of pressure, its diameter continues to increase this packer from top to bottom, and cost and structural requirement are strict.Along with increasing of the influence factor of external environment, existing well packer is ubiquity deblocking difficulty or the problem of deblocking not in use.In the well workover process, because packer deblocking not can only pull out by force during lift pipe string, the phenomenon that causes oil pipe to be broken happens occasionally, and causes thus great down-hole accident, and workover cost increases greatly.
Summary of the invention
Technical problem to be solved by this invention is: a kind of well packer capable of flushing well of realizing that the down-hole secondary sets, in setting mechanism, be provided with and set valve, after upper piston is finished and is once set, the valve cover is up, open the inlet of valve, when outer hydraulic coupling reaches the setting value of valve switch, manage outer liquid stream and inject the lower piston hydraulic cavities by fluid course, the realization secondary sets, and it is unbalance to have overcome in the well packer of prior art the tubing string external and internal pressure, the packer complicated integral structure, easily cause in the use the damage of sleeve pipe and ubiquity deblocking difficulty or the defective of deblocking not.
The present invention solves this technical problem the technical scheme that adopts: a kind of well packer capable of flushing well of realizing that the down-hole secondary sets comprises well-flushing mechanism, sealing mechanism, retaining mechanism, setting mechanism reconciliation sealing mechanism; Described well-flushing mechanism comprises top connection, top cover, flushing valve and sealing ring I, top cover is installed at top connection step place, and have the liquid injection port I in the top connection, top cover and top connection consist of the hydraulic cavities of flushing valve, the top connection lower end is threaded with inner central tube, and the sealing ring I is placed in the middle side of flushing valve Internal and external cycle; Described sealing mechanism comprises exterior central tube, three packing elements, two spacer rings and joint ring, the exterior central tube upper end is threaded with top cover, three packing elements are installed in respectively on exterior central tube top, three positions of middle side and below by two spacer rings separations, be embedded with the O RunddichtringO in the joint ring, the sealing ring is installed in the above-mentioned packing element lower end that is installed in the exterior central tube below, is fixed by the step block that exterior central tube connects; Described retaining mechanism comprises slip spider, distinguish internal slip and lock sleeve, and slip spider is installed on the inner central tube, and the distinguish internal slip is installed in the slip spider, on the lock sleeve with the tooth of falling the gingival cyst of mucous gland in the newborn, with profile of tooth, can closely fasten on the distinguish internal slip; Described setting mechanism mainly comprises upper piston, lower piston, valve seat and set valve, set and be provided with inlet on the valve, set valve and comprise again the valve cover, the valve support, the valve switch, Compress Spring and two sealing ring II, step place at connector is provided with upper piston, have the liquid injection port II on the corresponding connector herein, connector below terminal with valve seat with being threaded, the top of the connecting thread of connector has the liquid injection port III, upper piston connects the valve cover by casing coupling, the upper end of lower piston leans the lower end at casing coupling, the lower end of lower piston and valve seat form the hydraulic cavities of lower piston, between valve cover and the inner sleeve valve seat is installed, setting valve is installed on the valve seat, have aperture and inner sleeve on the valve seat and consist of fluid course, the inner sleeve lower end connects lower contact, and the valve support is installed in the valve seat, valve switch and Compress Spring are placed in respectively on the valve support, and Compress Spring is positioned on the valve seat; Described solution sealing mechanism is the deblocking sleeve, and it is installed in the upper end of connector.
Above-mentioned a kind of well packer capable of flushing well of realizing that the down-hole secondary sets, described top, middle side and below, be corresponding accompanying drawing 2 drawings upper, the neutralization under the orientation.
Above-mentioned a kind of well packer capable of flushing well of realizing that the down-hole secondary sets, described deblocking sleeve are the circular sleeve with inner conical surface.
Above-mentioned a kind of well packer capable of flushing well of realizing that the down-hole secondary sets, wherein related component obtain by fabrication techniques commercially available or that grasp with those skilled in the art, and the installation between all component and method of attachment all are common methods that those skilled in the art grasp.
The invention has the beneficial effects as follows: compared with prior art, a kind of significant advantage of well packer capable of flushing well that realizes that the down-hole secondary sets of the present invention is:
(1) is provided with in the setting mechanism among the present invention and sets valve, after upper piston is finished and is once set, the valve cover is up, opens the inlet of valve, when outer hydraulic coupling reaches the setting value of valve switch, manage outer liquid stream and inject the lower piston hydraulic cavities by fluid course, the realization secondary sets, thus the inside and outside fluid pressure of balance tubing string, and greatly improved and set pressure, sealing effectiveness is good, prolongs the application life of packer;
(2) secondary that sets valve among the present invention set be relative upper piston once set action, structure design is novel, can effectively use the intrinsic fluid of oil well casing and repeatedly the fluid pressure that accumulates of well-flushing increase and set pressure, prevent the wriggling of tubing string, thereby guarantee the positiver sealing of packing element.
(3) solution sealing mechanism of the present invention adopts circular sleeve with inner conical surface as separating big envelope, so that the compact overall structure of packer, make the removing seal for packer action simple and reliable, avoid because of packer not deblocking cause accident that oil pipe breaks to occur and the accident of breaking tubing string when effectively avoiding well workover occurs, workover cost reduces, and has saved man-hour and cost of production.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a kind of formation schematic block diagram of realizing the well packer capable of flushing well that the down-hole secondary sets of the present invention.
Fig. 2 be the present invention a kind of realize well packer capable of flushing well that the down-hole secondary sets partly cut open structural representation.
Fig. 3 be in the ellipse circle among Fig. 1 part partly cut open structural representation.
Fig. 4 is the view that a kind of profile of tooth that realizes the lock sleeve in the well packer capable of flushing well that the down-hole secondary sets and distinguish internal slip of the present invention fastens.
Among the figure, 1. top connection, 2. top cover, 3. flushing valve, 4. sealing ring I, 5. exterior central tube, 6. packing element, 7. spacer ring, 8. inner central tube, 9. joint ring, 10. slip spider, 11. distinguish internal slips, 12. the deblocking sleeve, 13. lock sleeves, 14. upper pistons, 15. connectors, 16. casing coupling, 17. inner sleeves, 18. lower pistons, 19. set valve, 20. valve covers, 21. valve seats, 22. lower contact, 23. step block, 24. valve supports, 25. the valve switch, 26. Compress Springs, 27. liquid injection port I, 28. the liquid injection port II, 29. inlets, 30. apertures, 31. fluid course, 32. sealing ring II, 33. liquid injection port III.
The specific embodiment
Embodiment illustrated in fig. 1 showing, a kind of well packer capable of flushing well of realizing that the down-hole secondary sets of the present invention comprises well-flushing mechanism, sealing mechanism, retaining mechanism, setting mechanism reconciliation sealing mechanism; Described well-flushing mechanism comprises top connection, top cover, sealing ring I and flushing valve, described sealing mechanism comprises exterior central tube, three packing elements, two spacer rings and joint ring, described retaining mechanism comprises slip spider, distinguish internal slip and lock sleeve, described setting mechanism mainly comprises upper piston, lower piston, sets valve and valve seat, set valve and comprise again valve cover, sealing ring II, valve support, valve switch and Compress Spring, described solution sealing mechanism is the deblocking sleeve.
Embodiment illustrated in fig. 2ly partly cut open structure for what a kind of well packer capable of flushing well of realizing that the down-hole secondary sets of the present invention was fixed on the original state that in the sleeve pipe of oil well is, it shows that the arrangement of all parts in this flushing packer and connected mode are: top cover 2 is installed at top connection 1 step place, and have liquid injection port I 27 in the top connection 1, top cover 2 and top connection 1 consist of the hydraulic cavities of flushing valve 3, top connection 1 lower end is threaded with inner central tube 8, sealing ring I 4 is placed in the middle side of flushing valve 3 Internal and external cycles, exterior central tube 5 upper ends are threaded with top cover 2, three packing elements 6 are installed in respectively exterior central tube 5 tops by 7 separations of two spacer rings, on three positions in middle side and below, be embedded with the O RunddichtringO in the joint ring 9, sealing ring 9 is installed in above-mentioned packing element 6 lower ends that are installed in the exterior central tube below, fixing by the step block 23 that exterior central tube 5 connects, slip spider 10 is installed on the inner central tube 8, distinguish internal slip 11 is installed in the slip spider 10, on the lock sleeve 13 with the tooth of falling the gingival cyst of mucous gland in the newborn, on the distinguish internal slip 11 with profile of tooth, can closely fasten, step place at connector 15 is provided with upper piston 14, have liquid injection port II 28 on the corresponding connector 15 herein, connector 15 belows are terminal to be threaded with valve seat 21 usefulness, the screw thread top of connector 15 has liquid injection port III 33, upper piston 14 connects valve cover 20 by casing coupling 16, inner sleeve 17 lower ends connect lower contact 22, the upper end of lower piston 18 leans on the step of the lower end of casing coupling 16, the lower end of lower piston 18 and valve seat 21 form the hydraulic cavities of lower piston 18, set and be provided with inlet 29 on the valve 19, between valve cover 20 and the inner sleeve 17 valve seat 21 is installed, set valve 19 and be installed on the valve seat 21, deblocking sleeve 12 is installed in the upper end of connector 15.
Embodiment illustrated in fig. 3 is a kind of structure that sets valve 19 and installation site thereof of realizing the well packer capable of flushing well that the down-hole secondary sets of the present invention, it shows and sets the valve cover 20 that valve 19 shows in comprising Fig. 2, also comprise valve support 24, valve switch 25, Compress Spring 26 and two sealing ring II 32, the aperture 30 that has on the valve seat 21 consists of fluid course 31 with inner sleeve 17, valve support 24 is installed in the valve seat 21, valve switch 25 and Compress Spring 26 are placed in respectively on the valve support 24, Compress Spring 26 is positioned on the valve seat 21, the two ends of valve seat 21 are embedded with sealing ring II 32, valve seat 21 is threaded with connector 15, and the top of the connecting thread of connector 15 has liquid injection port III 33.Shown in this figure is to set the state that valve 19 is not opened at valve switch 25, sets valve 19 and is installed on the valve seat 21.
Embodiment illustrated in fig. 4 showing, in setting process and washing well process, on the lock sleeve 13 with the profile of tooth of the tooth of falling the gingival cyst of mucous gland in the newborn and distinguish internal slip 11 closely fasten.
Embodiment 1
According to above-mentioned embodiment illustrated in fig. 1, embodiment illustrated in fig. 2 and embodiment illustrated in fig. 3, device becomes a kind of well packer capable of flushing well of realizing that the down-hole secondary sets, and wherein, deblocking sleeve 12 is the circular sleeve with inner conical surface, and flushing valve 3 adopts steel couple valve.This is a kind of realizes that the course of work of the well packer capable of flushing well that the down-hole secondary sets is as follows:
Set process: after present embodiment is realized that well packer capable of flushing well that the down-hole secondary sets is lowered to the precalculated position with tubing string, in oil pipe, build the pressure, highly pressurised liquid enters in the cavity between flushing valve 3 and the top connection 1 via the liquid injection port I 27 in the top connection 1 of this packer, promote the flushing valve 3 descending well-flushing passages of closing, continue pressurization, hydraulic pressure acts on the upper piston 14 by the liquid injection port II 28 on the connector 15, upper piston 14 promotes lock sleeve 13 and joint ring 9 compression below packing elements 6, this thrust continues to act on successively middle side and top packing element 6 by spacer ring 7, make the diameter of packing element 6 become large, thereby packing oil pipe and sleeve pipe annular space, form thus and once set, meanwhile, it is 20 up that the valve that upper piston 14 lower ends connect by casing coupling 16 overlaps, open the inlet 29 that sets valve 19, the setting value that reaches valve switch 25 when the outer fluid pressure of pipe is during than the high 0.5MPa of working environment of valve switch, valve switch 25 is opened, outer liquid enters fluid course 31 by the aperture 30 on the valve seat 21, the hydraulic cavities that liquid stream enters lower piston 18 by the liquid injection port III 33 on the connector 15, hydraulic action is on lower piston 18, lower piston 18 up promotion casing couplings 16 pass to upper piston 14 with power, thereby further increase setting force, realize that the secondary of three packing elements 6 sets.
Washing well process: the current with pressure that inject certain pressure intensity in the oil pipe, hydraulic pressure acts on the flushing valve 3 via the eyelet on the top cover 2, promote the up well-flushing passage of opening of valve body of flushing valve 3, current flow to the pipe box annular space of this packer bottom via the tank of the annular space of inner central tube 8 and exterior central tube 5 and lock sleeve 13, enter the oil pipe inner chamber from packer tubing string bottom again and return well head, reach the effect of anti-flushing well.
The deblocking process: on carry the packer tubing string, top connection 1 drives inner central tube 8 and moves upward, it is up that connector 15 promotes deblocking sleeve 12, and since the frictional force between three packing elements 6 and the tube inner wall so that top cover 2, exterior central tube 5 and distinguish internal slip 11 keep relative positions constant, deblocking sleeve 12 just forces distinguish internal slip 11 interior receipts, thereby lock sleeve 13 separates with distinguish internal slip 11, and three packing elements 6 can rebound successively, restore to the original state, deblocking is finished.
Embodiment 2
Except the setting value that reaches valve switch 25 when the fluid pressure of pipe be during than the high 0.6MPa of valve switch environment outside, other are all with embodiment 1.
Embodiment 3
Except the setting value that reaches valve switch 25 when the fluid pressure of pipe be during than the high 0.7MPa of valve switch environment outside, other are all with embodiment 1.
Claims (2)
1. a well packer capable of flushing well of realizing that the down-hole secondary sets is characterized in that: comprise well-flushing mechanism, sealing mechanism, retaining mechanism, setting mechanism reconciliation sealing mechanism; Described well-flushing mechanism comprises top connection, top cover, flushing valve and sealing ring I, top cover is installed at top connection step place, and have the liquid injection port I in the top connection, top cover and top connection consist of the hydraulic cavities of flushing valve, the top connection lower end is threaded with inner central tube, and the sealing ring I is placed in the middle side of flushing valve Internal and external cycle; Described sealing mechanism comprises exterior central tube, three packing elements, two spacer rings and joint ring, the exterior central tube upper end is threaded with top cover, three packing elements are installed in respectively on exterior central tube top, three positions of middle side and below by two spacer rings separations, be embedded with the O RunddichtringO in the joint ring, the sealing ring is installed in the above-mentioned packing element lower end that is installed in the exterior central tube below, is fixed by the step block that exterior central tube connects; Described retaining mechanism comprises slip spider, distinguish internal slip and lock sleeve, and slip spider is installed on the inner central tube, and the distinguish internal slip is installed in the slip spider, on the lock sleeve with the tooth of falling the gingival cyst of mucous gland in the newborn, with profile of tooth, can closely fasten on the distinguish internal slip; Described setting mechanism mainly comprises upper piston, lower piston, valve seat and set valve, set and be provided with inlet on the valve, set valve and comprise again the valve cover, the valve support, the valve switch, Compress Spring and two sealing ring II, step place at connector is provided with upper piston, have the liquid injection port II on the corresponding connector herein, connector below terminal with valve seat with being threaded, the top of the connecting thread of connector has the liquid injection port III, upper piston connects the valve cover by casing coupling, the upper end of lower piston leans the lower end at casing coupling, the lower end of lower piston and valve seat form the hydraulic cavities of lower piston, between valve cover and the inner sleeve valve seat is installed, setting valve is installed on the valve seat, have aperture and inner sleeve on the valve seat and consist of fluid course, the inner sleeve lower end connects lower contact, and the valve support is installed in the valve seat, valve switch and Compress Spring are placed in respectively on the valve support, and Compress Spring is positioned on the valve seat; Described solution sealing mechanism is the deblocking sleeve, and it is installed in the upper end of connector.
2. said a kind of well packer capable of flushing well of realizing that the down-hole secondary sets according to claim 1, it is characterized in that: described deblocking sleeve is the circular sleeve with inner conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210529974.XA CN102953706B (en) | 2012-12-10 | 2012-12-10 | Washable well packer for realizing underground secondary setting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210529974.XA CN102953706B (en) | 2012-12-10 | 2012-12-10 | Washable well packer for realizing underground secondary setting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102953706A true CN102953706A (en) | 2013-03-06 |
| CN102953706B CN102953706B (en) | 2015-04-08 |
Family
ID=47763035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210529974.XA Active CN102953706B (en) | 2012-12-10 | 2012-12-10 | Washable well packer for realizing underground secondary setting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102953706B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221100A (en) * | 2015-09-21 | 2016-01-06 | 西南石油大学 | A kind of non-tubing string motion can restting deblocking packer |
| CN105781477A (en) * | 2016-03-11 | 2016-07-20 | 新疆华隆油田科技股份有限公司 | Compression type bi-directional bearing controllable well washing packer |
| CN111535775A (en) * | 2020-05-21 | 2020-08-14 | 济南鸿泰华丰机械有限公司 | Adjustable constant pressure washable well packer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2432333Y (en) * | 2000-06-28 | 2001-05-30 | 曹允良 | Flushing packer |
| CN2515420Y (en) * | 2001-11-13 | 2002-10-09 | 中国石油化工股份有限公司中原油田分公司采油二厂 | Packer |
| CN2685552Y (en) * | 2003-12-01 | 2005-03-16 | 大庆石油管理局 | Static hydraulic washable well packer |
| CN201433735Y (en) * | 2009-04-10 | 2010-03-31 | 崔朝轩 | Packer special for plugging water |
| CN202937222U (en) * | 2012-12-10 | 2013-05-15 | 河北工业大学 | Well-flushing packer capable of achieving downhole secondary setting |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU604967A1 (en) * | 1974-10-04 | 1978-04-30 | Полтавское отделение Украинского научно-исследовательского геологоразведочного института | Device for cementing sections of casing columns |
-
2012
- 2012-12-10 CN CN201210529974.XA patent/CN102953706B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2432333Y (en) * | 2000-06-28 | 2001-05-30 | 曹允良 | Flushing packer |
| CN2515420Y (en) * | 2001-11-13 | 2002-10-09 | 中国石油化工股份有限公司中原油田分公司采油二厂 | Packer |
| CN2685552Y (en) * | 2003-12-01 | 2005-03-16 | 大庆石油管理局 | Static hydraulic washable well packer |
| CN201433735Y (en) * | 2009-04-10 | 2010-03-31 | 崔朝轩 | Packer special for plugging water |
| CN202937222U (en) * | 2012-12-10 | 2013-05-15 | 河北工业大学 | Well-flushing packer capable of achieving downhole secondary setting |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221100A (en) * | 2015-09-21 | 2016-01-06 | 西南石油大学 | A kind of non-tubing string motion can restting deblocking packer |
| CN105221100B (en) * | 2015-09-21 | 2017-07-11 | 西南石油大学 | A kind of non-tubing string motion is repeatable to set deblocking packer |
| CN105781477A (en) * | 2016-03-11 | 2016-07-20 | 新疆华隆油田科技股份有限公司 | Compression type bi-directional bearing controllable well washing packer |
| CN105781477B (en) * | 2016-03-11 | 2019-04-26 | 新疆华隆油田科技股份有限公司 | The controllable flushing packer of compression bidirectional bearing |
| CN111535775A (en) * | 2020-05-21 | 2020-08-14 | 济南鸿泰华丰机械有限公司 | Adjustable constant pressure washable well packer |
| CN111535775B (en) * | 2020-05-21 | 2022-08-30 | 东营市华科石油科技开发有限责任公司 | Adjustable constant pressure washable well packer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102953706B (en) | 2015-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201705275U (en) | Washable well packer | |
| CN206693997U (en) | A kind of oil field is every excavating technology tubing string | |
| CN103397863B (en) | Double acting compression packer and using method thereof | |
| CN106437605B (en) | A kind of packer | |
| CN204436320U (en) | A kind of hydraulic releasing big orifice packer | |
| CN103485744B (en) | Directional well seperated layer water injection righting type packer | |
| CN104499993B (en) | Dual-flap-valve type downhole safety valve | |
| CN203420662U (en) | Small-diameter oil pipe plug | |
| CN101781977A (en) | Bidirectional high-pressure detachable bridge plug | |
| CN102953706B (en) | Washable well packer for realizing underground secondary setting | |
| CN108561107A (en) | Multistage water injection process pipe string and its remove method | |
| CN106761538A (en) | A kind of oil field is every using long packing element packer | |
| CN113790040A (en) | Oil extraction method of jet pump of series-connection type ultra-deep oil well | |
| CN206376810U (en) | A kind of oil field is every using long packing element packer | |
| CN202325386U (en) | Stepped setting fracture packer | |
| CN2861470Y (en) | Airtight power expansion packer | |
| CN201982282U (en) | Fixed valve-salvageable type oil well pump | |
| CN201843571U (en) | Oil drainage type packer | |
| CN209179726U (en) | One kind can sand washing bridge plug | |
| CN115095303B (en) | Underground liquid control device and using method thereof | |
| CN106761577A (en) | A kind of oil field is every excavating technology tubing string | |
| CN202731830U (en) | Removable and drillable type packer for oil well | |
| CN202937222U (en) | Well-flushing packer capable of achieving downhole secondary setting | |
| CN109441399A (en) | One kind can sand washing bridge plug | |
| CN201460802U (en) | Insertion pipe packer |
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 | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210129 Address after: 253500 east of middle section of Wuyou street, Lingxian Economic Development Zone, Dezhou City, Shandong Province Patentee after: Dezhou horizon Petroleum Technology Co.,Ltd. Address before: 300401 Hebei University of Technology, 5304 Xiping Road, Beichen District, Tianjin Patentee before: Hebei University of Technology |