CN2616668Y - Throw-dreg-free waterflooding packer - Google Patents
Throw-dreg-free waterflooding packer Download PDFInfo
- Publication number
- CN2616668Y CN2616668Y CN 03212739 CN03212739U CN2616668Y CN 2616668 Y CN2616668 Y CN 2616668Y CN 03212739 CN03212739 CN 03212739 CN 03212739 U CN03212739 U CN 03212739U CN 2616668 Y CN2616668 Y CN 2616668Y
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- China
- Prior art keywords
- coupling sleeve
- well
- center tube
- inlet opening
- packer
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- Expired - Lifetime
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Abstract
The utility model belongs to an oilfield flooding packer for a well. The utility model discloses the technique of a throw-dreg-free waterflooding packer, and solves the technical problem of self-locking after setting and the well backwashing. The inner part of an upper center pipe 2 which is connected with a screw thread in the inner side of the upper end of an upper connection 1 is connected with a well flushing piston 3 with a sealing ring in a hanging mode. A connecting sleeve 4 which is hermetically connected with a cylinder 6 connected with the lower end is hermetically connected with the upper center pipe 2 and a lower center pipe 7 through screw threads. A sealing rubber tube 8 is wedged between the connecting sleeve 4 and the lower center pipe 7. A one-way valve 5 is installed in the middle part of the connecting sleeve 4 and communicated with a middle flow passage 18. The setting pressure is from 1 to 2 MPa, the operating differential pressure is not less than 25MPa, the flushing opening pressure is not less than 4 MPa, and the de-archive pressure is not less than 4 MPa. The throw-dreg-free waterflooding packer is suitable for the operation of separate zone waterflooding of the oilfield flooding well.
Description
Affiliated technical field the utility model belongs to used for water injection wells in oil fields down-hole petroleum tool, particularly a kind of casting and dragging free water injection packer.
Background technology is present, the used seperated layer water injection packer in home and abroad, a kind of packer can lock after the seat envelope is finished, and has the anti-flushing well function, but seat seal pressure height, before packer set, in injection well downhole flow regulator, drop into blanking plug earlier, after the seat envelope is finished, blanking plug is pulled out, drop into the water distribution core again, increased the expense of water injection well construction like this; Another kind of packer, the seat seal pressure is low, need not drop into blanking plug before packer set in injection well downhole flow regulator, but packer can not lock, and stops annotating the automatic deblocking of back packer, can not satisfy waterflooding requirement.
The summary of the invention the purpose of this utility model is to overcome above technical deficiency, provides a kind of to seal self-locking, the casting and dragging free water injection packer of energy anti-flushing well.
Task of the present utility model is, one way valve is arranged in the middle of the casting and dragging free water injection packer coupling sleeve, the upper end is inboard to be connected with the upper center tube thread seal, fluid course on coupling sleeve, forming between the inlet opening in inlet opening and the coupling sleeve, the outside, middle part and cylinder barrel sealed attachment, fluid course in coupling sleeve, forming between the inlet opening under inlet opening and the coupling sleeve, wedging cartridge in lower end and the lower center tube, the inboard connects with the lower center tube thread seal, fluid course under forming between inlet opening and the cartridge under coupling sleeve; The thread connection top connection of upper center tube upper end, the outside articulates the well-flushing piston that rubber seal is housed, hydraulic cavities communicates with inlet opening on the upper center tube on well-flushing piston upper end, hydraulic cavities communicates with inlet opening under the upper center tube in the inboard formation in middle and upper part, inlet opening on the inboard sealing in the middle and lower part coupling sleeve, the lower end lower hydraulic pressure chamber communicates with the top connection inlet opening.During water filling, liquid flow through inlet opening under one way valve, middle fluid course, the coupling sleeve, fluid course is the cartridge envelope that expands down, the seat envelope is finished, and water injection pressure enters, middle hydraulic cavities, on the effect well-flushing piston, last hydraulic cavities active force is greater than middle hydraulic cavities active force, promote the well-flushing piston and move down, seal inlet opening on the coupling sleeve, after stopping pressing, closed check valve, the sealing of liquid stream.During anti-flushing well, liquid stream enters lower hydraulic pressure chamber by the top connection inlet opening, push away on the well-flushing piston and move, packer enclose inside liquid is inlet opening outflow under inlet opening, the upper center tube on inlet opening, last fluid course, the coupling sleeve in inlet opening, middle fluid course, the coupling sleeve under coupling sleeve, the packer sealing packing element reclaims, the instrument deblocking, back-washable well.
The utlity model has following characteristics: one, adopt the expanding cartridge, the seat seal pressure is low, and choke pressure just can be finished seat and seals during normal water filling; Its two, packer can be controlled the locking and the decapsulation functions of packer set by one way valve, the relative position of well-flushing piston in packer.
Description of drawings specifies with embodiment below in conjunction with accompanying drawing.
Fig. 1 shows casting and dragging free water injection packer structure.
Among the figure, the 1-top connection; The 2-upper center tube; 3-well-flushing piston; The 4-coupling sleeve; The 5-one way valve; The 6-cylinder barrel; The 7-lower center tube; The 8-cartridge; The last hydraulic cavities of 9-; Inlet opening on the 10-upper center tube; Hydraulic cavities among the 11-; Inlet opening under the 12-upper center tube; Inlet opening on the 13-coupling sleeve; The last fluid course of 14-; 15-top connection inlet opening; The 16-lower hydraulic pressure chamber; Inlet opening in the 17-coupling sleeve; Fluid course among the 18-; Inlet opening under the 19-coupling sleeve; Fluid course under the 20-
The specific embodiment is with reference to accompanying drawing 1, upper center tube 2 inside that the top connection 1 upper end inside thread of casting and dragging free water injection packer connects articulate the well-flushing piston 3 of band sealing ring, the lower end connects sealed attachment coupling sleeve 4 and upper center tube 2 in the cylinder barrel 6, lower center tube 7 thread seals connect, wedging cartridge 8 between coupling sleeve 4 and the lower center tube 7, one way valve 5 is installed at coupling sleeve 4 middle parts, connect in the top connection 1 and connect inlet opening 10 on the last hydraulic cavities 9 connection upper center tubes of well-flushing piston 3 compositions in the central tube 2, hydraulic cavities 11 was communicated with inlet opening 12 under the upper center tube during upper center tube 2 external well-flushing piston 3 external coupling sleeves 4 were formed, connect in the top connection 1 and connect coupling sleeve 4 composition lower hydraulic pressure chambers 16 connection top connection inlet openings 15 in the well-flushing piston 3, inlet opening 13 on the coupling sleeve of well-flushing piston 3 inner seals, the last fluid course 14 that upper center tube 2 external coupling sleeves 4 constitute, inlet opening 17 in the coupling sleeve, connect the middle fluid course 18 that coupling sleeve 4 constitutes in the cylinder barrel 6, inlet opening 19 under the coupling sleeve, connect following fluid course 20 orders that wedge cartridge 8 constitutes in the lower center tube 7 in the coupling sleeve 4 and be communicated with fluid course 18 during one way valve 5 is communicated with.
The casting and dragging free water injection packer course of work: top connection 1 connects oil pipe, lower center tube connects oil pipe 7 times, injection well downhole flow regulator, ball seat, the arrival desired location of going into the well, water filling pressurization in oil pipe, the liquid one way valve 5 of flowing through, middle fluid course 18, inlet opening 19 under the coupling sleeve, following fluid course 20 expands cartridge 8 and seals, the seat envelope is finished, and can realize seperated layer water injection, and water injection pressure enters simultaneously, middle hydraulic cavities 9,11, on the effect well-flushing piston 3, last hydraulic cavities 9 active forces promote well-flushing piston 3 and move down greater than middle hydraulic cavities 11 active forces, seal inlet opening 13 on the coupling sleeve, after stopping pressing, one way valve 5 is closed, the sealing of liquid stream, packer self-locking.During anti-flushing well, pressurize to the oil jacket annulus water injection, liquid stream enters lower hydraulic pressure chamber 16 by top connection inlet opening 15, push away on the well-flushing piston 3 and move, packer enclose inside liquid is inlet opening 12 outflows under inlet opening 13, the upper center tube on inlet opening 17, last fluid course 14, the coupling sleeve in inlet opening 19, middle fluid course 18, the coupling sleeve under coupling sleeve, packer sealing packing element 8 reclaims back-washable well.Deblocking and salvaging, packer deblocking during anti-flushing well, the upper lifting pipe post is pulled packer out.
Casting and dragging free water injection packer technical performance index:
Seat seal pressure 1-2MPa
Pressure reduction≤25MPa in the work
Work is pressure reduction≤25MPa down
Well-flushing opening pressure≤4MPa
Separate seal pressure≤4MPa
Operating temperature≤120 ℃
The casting and dragging free water injection packer is applicable to water injection well in oil fields seperated layer water injection operation.
Claims (3)
1, a kind of casting and dragging free water injection packer, it is characterized in that upper center tube (2) inside that top connection (1) upper end inside thread connects articulates the well-flushing piston (3) of being with sealing ring, the lower end connects cylinder barrel (6) interior sealed attachment coupling sleeves (4) and connects with upper center tube (2), lower center tube (7) thread seal, wedge cartridge (8) between coupling sleeve (4) and the lower center tube (7), one way valve (5) is installed at coupling sleeve (4) middle part.
2, according to claims 1 described casting and dragging free water injection packer, it is characterized in that connecting in the top connection (1) and connect on well-flushing piston (3) composition hydraulic cavities (9) in the central tube (2) and be communicated with inlet opening (10) on the upper center tube, hydraulic cavities (11) was communicated with inlet opening (12) under the upper center tube during the external coupling sleeve of the external well-flushing piston of upper center tube (2) (3) (4) was formed, and connect in the top connection (1) and connect coupling sleeve (4) composition lower hydraulic pressure chamber (16) connection top connection inlet opening (15) in the well-flushing piston (3).
3, according to claims 1 described casting and dragging free water injection packer, it is characterized in that connecing in inlet opening (17), the cylinder barrel (6) in last fluid course (14) that inlet opening (13) on the coupling sleeve of well-flushing piston (3) inner seal, the external coupling sleeve of upper center tube (2) (4) constitute, the coupling sleeve under middle fluid course (18) that coupling sleeve (4) constitutes, the coupling sleeve and connect following fluid course (20) the order connection that interior the wedge cartridge of lower center tube (7) (8) constitutes, fluid course (18) in one way valve (5) connection in inlet opening (19), the coupling sleeve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03212739 CN2616668Y (en) | 2003-04-18 | 2003-04-18 | Throw-dreg-free waterflooding packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03212739 CN2616668Y (en) | 2003-04-18 | 2003-04-18 | Throw-dreg-free waterflooding packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2616668Y true CN2616668Y (en) | 2004-05-19 |
Family
ID=34241973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03212739 Expired - Lifetime CN2616668Y (en) | 2003-04-18 | 2003-04-18 | Throw-dreg-free waterflooding packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2616668Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915070A (en) * | 2010-08-23 | 2010-12-15 | 东营市兆鑫工贸有限责任公司 | Expanding open hole packer |
-
2003
- 2003-04-18 CN CN 03212739 patent/CN2616668Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915070A (en) * | 2010-08-23 | 2010-12-15 | 东营市兆鑫工贸有限责任公司 | Expanding open hole packer |
| CN101915070B (en) * | 2010-08-23 | 2013-01-23 | 东营市兆鑫工贸有限责任公司 | Expanding open hole packer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130418 Granted publication date: 20040519 |