CN2841949Y - Reverse differential pressure anchor packer - Google Patents
Reverse differential pressure anchor packer Download PDFInfo
- Publication number
- CN2841949Y CN2841949Y CN 200520084840 CN200520084840U CN2841949Y CN 2841949 Y CN2841949 Y CN 2841949Y CN 200520084840 CN200520084840 CN 200520084840 CN 200520084840 U CN200520084840 U CN 200520084840U CN 2841949 Y CN2841949 Y CN 2841949Y
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- CN
- China
- Prior art keywords
- pressure reduction
- anchor
- reverse pressure
- anchor body
- packer
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- Expired - Fee Related
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Abstract
The utility model discloses a reverse pressure difference anchoring packer for petroleum industry, which is suitable for oil wells which use rod pumps to exploit oil. The packer comprises a sealing part, a slip assembly, a friction block and a reversing mechanism which are orderly connected and installed, wherein a reverse pressure difference anchoring part and an unsealing part are connected and installed at the upper part of the sealing part. The utility model adopts upper part anchoring after seat sealing, and an anchor fluke can not be anchored before the seat sealing of the packer. After the seat sealing, when the upper and the lower pressure differences of a rubber cylinder exceed the starting pressure of the anchor fluke, the anchor fluke is extended out and anchored on the inner wall of a sleeve pipe, and anchored radial direction force becomes bigger when pressure differences become bigger. Owing to the upper part of the packer is anchored, compression force exerted to the rubber cylinder of the sealing part becomes bigger when the pressure differences become bigger, and the compression force is proportional to the pressure differences. The development effect of separate layer exploitation is guaranteed, the recovery efficiency is improved, and the production cost is reduced.
Description
Technical field
The utility model relates to the downhole tool of petroleum industry, and particularly reverse pressure reduction anchoring packer is applicable to the oil well with sucker rod pumping.
Technical background
Machinery set the formula packer petroleum industry oil recovery The field extensively, the technology comparative maturity, as press the tubing string classification of type, be broadly divided into the integral production tubing string and the flow string two big classes of giving up.Wherein the integral production tubing string is because of simple in structure, and constructing operation is easy, and low cost and other advantages is subjected to on-the-spot user of service's welcome.Supporting use Y111 type and Y211 or Y221 type packer in the integral production tubing string, Y111 type packer are to support by tail pipe, oil pipe deadweight seat envelope, on carry the compression packer of oil pipe deblocking.Y211 or Y221 type packer are the slips assemblies that there is one group of band brake pad the lower end, rely on the slips track on the central tube that slips is supported on the internal surface of sleeve pipe, are tubing string deadweight seat envelope, and the compression packer of upper lifting pipe post deblocking is had any different on the structure slightly.This integral production tubing string of being made up of mechanical packer relies on the tubing string ballast to set on the one hand, and tubing bending after the completion has increased rod and tube partial-wear, has reduced pump efficiency; The oil recovery of laminated distributor under well card envelope is carried out in Y111 packer and Y221, the supporting use of Y211 packer on the other hand, and the following pressure reduction that is sealed is less, is about 8MPa in theory, and the reverse pressure reduction of on-the-spot often generation 2-3MPa is that the phenomenon of deblocking takes place.Especially after producing fluid level dropped to certain position, the unexpected deblocking of packer meeting had a strong impact on the oil production by layer development effectiveness.
Summary of the invention
The purpose of this utility model provides reverse pressure reduction anchoring packer, overcome the following little defective of pressure reduction of mechanical packer sealing in the prior art, solve the practical problem of reverse pressure reduction deblocking, guarantee the development effectiveness of oil production by layer, improve recovery ratio, reduce production costs.
Use the present technique solution can reach above-mentioned purpose: reverse pressure reduction anchoring packer, comprise hermetic unit, slips assembly, brake pad and changement, hermetic unit, slips assembly, brake pad and changement connection successively are in reverse pressure reduction anchor portion of the top of hermetic unit connection and deblocking part.
The utility model compared with prior art has the following advantages: the utility model adopts the seat top grappling of being honored as a queen, and anchor fluke can grappling before packer set.Be honored as a queen the upper and lower pressure reduction of packing element when surpassing the anchor fluke starting pressure when seat, and anchor fluke stretches out, and be anchored on the internal surface of sleeve pipe, and pressure reduction is big more, and the radial load of grappling is big more.Because the grappling of packer top, the big more compressive force to the hermetic unit packing element of pressure reduction is also big more, and compressive force and pressure reduction are directly proportional.So in oil pumping process, the packer wriggling that can not make progress with the variation of pressure reduction; And along with the increase of pressure reduction, the power of compression packing element also increases thereupon.Thereby guaranteed that whole sealing system can not lose efficacy with the pressure reduction increase, improved sealing performance greatly, guaranteed the development effectiveness of oil production by layer.Improved recovery ratio, reduced production costs.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment
Below in conjunction with embodiment the utility model is done further detailed description: referring to accompanying drawing, oppositely the pressure reduction anchoring packer comprises hermetic unit, slips assembly 19, brake pad 20 and changement 21, hermetic unit, slips assembly 19, brake pad 20 and changement 21 connection successively are in reverse pressure reduction anchor portion of the top of hermetic unit connection and deblocking part.Oppositely the pressure reduction anchor portion comprises that spring 5, anchor fluke 6, press strip 7, anchor body 10 and center isolate bushing pipe 12, the center isolates bushing pipe 12 outer anchor fluke 6, spring 5, anchor body 10 and the press strips 7 installed, spring 5 is installed in the installing hole of anchor fluke 6, anchor fluke 6 is installed in the installing hole of anchor body 10, its outer press strip 7 of installing.Press strip 7 is fixed on the anchor body 10 by screw 9, between the assemblage gap of anchor body 10, anchor fluke 6 and between the assemblage gap of anchor body 10 and center isolation bushing pipe 12 sealing ring 4 and sealing ring 8 being set.The center isolates 12 of bushing pipes on the interior platform of the central tube 18 of slips assembly 19, by sealing ring 17 sealings.Deblocking comprises partly that by cap 1, retainingf key 2 and deblocking shear pin 3 center that retainingf key 2 is placed on reverse pressure reduction anchor portion isolates in the mounting groove of bushing pipe 12, and deblocking shear pin 3 is fixing with anchor body 10 with the center isolation bushing pipe 12 of reverse pressure reduction anchor portion.Hermetic unit comprises adjustable ring 11, outer tube 13, packing element 14 and 16 and pad 15, and outer tube 13 is provided with pressure transmission hole, and its upper end is connected with the anchor body 10 of reverse pressure reduction anchor portion.Oppositely pressure reduction anchor portion top is by being connected by cap 1 of anchor body 10 and deblocking part, and its underpart is passed through anchor body 10 and is connected with the adjustable ring 11 of hermetic unit.
On needing, the utility model carries deblocking, when the deblocking pulling force surpasses the shear strength of deblocking shear pin 3, deblocking shear pin 3 is cut off, and the center isolates bushing pipe 12 simultaneously has a deblocking stroke in the vertical with respect to anchor body 10, and retainingf key 2 center that prevents isolates bushing pipe 12 and rotates relative to anchor body 10; Anchor body 10 is threaded with outer tube 13, and anchor body 10 is threaded with adjustable ring 11, can regulate certain distance.Packing element 14,16 and pad 15 are enclosed within outside the outer tube 13, outer tube 13 is threaded with central tube 18, and outer tube 13 is provided with pressure transmission hole, central septum cordis from move on the bushing pipe 12 certain deblocking apart from the time, the center isolates bushing pipe 12 shifts out from sealing ring 17, central tube 18 and 13 inside and outside connections of outer tube.After packing element 14 and 16 envelopes were compressed, when packing element 14,16 produced certain pressure reduction up and down, anchor fluke 6 outwards moved certain distance from the hole that anchor body 10 matches, be anchored on the internal surface of sleeve pipe, when pressure disappears, under the effect of spring 5, grappling is removed in anchor fluke 6 withdrawals.
In the process of going into the well, this device is according to designing the corresponding site that needs are connected oil pipe, and the slips assembly 19 of lower end band brake pad 20 relies on the slips track on the central tube 18 that slips is supported on the internal surface of sleeve pipe, is oil pipe deadweight seat envelope.During deblocking, the upper lifting pipe post gets final product, and the last top power that packing element 14,16 bears is greater than the anchorage force of anchor fluke 6, and after the tubing string ballast on the packer disappeared, anchor fluke 6 can upwards slide along internal surface of sleeve pipe.Packing element 14 and 16 deblockings, pressure reduction restores balance gradually about it, and anchor fluke 6 bounces back under the elastic force of spring 5.If anchor fluke 6 unfreezing difficulties, the upper lifting pipe post is cut off deblocking shear pin 3 energetically, moves certain distance on the central tube 18, be communicated with outer tube 13, card seal pressure discharges gradually, downforce balance gradually on the packing element 14 and 16, anchor fluke 6 retractions, grappling is removed, and the upper lifting pipe post gets final product.
Claims (6)
1, reverse pressure reduction anchoring packer, comprise hermetic unit, slips assembly (19), brake pad (20) and changement (21), hermetic unit, slips assembly (19), brake pad (20) and changement (21) connection successively is characterized in that in reverse pressure reduction anchor portion of the top of hermetic unit connection and deblocking part.
2, reverse pressure reduction anchoring packer according to claim 1, it is characterized in that reverse pressure reduction anchor portion comprises that spring (5), anchor fluke (6), press strip (7), anchor body (10) and center isolate bushing pipe (12), the center isolates outer anchor fluke (6), spring (5), anchor body (10) and the press strip (7) installed of bushing pipe (12), spring (5) is installed in the installing hole of anchor fluke (6), anchor fluke (6) is installed in the installing hole of anchor body (10), its outer press strip (7) of installing.
3, reverse pressure reduction anchoring packer according to claim 2, it is characterized in that press strip (7) is fixed on the anchor body (10) by screw (9), between the assemblage gap of anchor body (10), anchor fluke (6) and between the assemblage gap of anchor body (10) and center isolation bushing pipe (12) sealing ring (4) and sealing ring (8) being set.
4, reverse pressure reduction anchoring packer according to claim 1, it is characterized in that deblocking partly comprises by cap (1), retainingf key (2) and deblocking shear pin (3), the center that retainingf key (2) is placed on reverse pressure reduction anchor portion isolates in the mounting groove of bushing pipe (12), and deblocking shear pin (3) is fixing with anchor body (10) with the center isolation bushing pipe (12) of reverse pressure reduction anchor portion.
5, reverse pressure reduction anchoring packer according to claim 1, it is characterized in that hermetic unit comprises adjustable ring (11), outer tube (13), packing element (14) and (16) and pad (15), outer tube (13) is provided with pressure transmission hole, and its upper end is connected with the anchor body (10) of reverse pressure reduction anchor portion.
6, reverse pressure reduction anchoring packer according to claim 1 is characterized in that reverse pressure reduction anchor portion top by being connected by cap (1) of anchor body (10) and deblocking part, and its underpart is passed through anchor body (10) and is connected with the adjustable ring (11) of hermetic unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520084840 CN2841949Y (en) | 2005-06-29 | 2005-06-29 | Reverse differential pressure anchor packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520084840 CN2841949Y (en) | 2005-06-29 | 2005-06-29 | Reverse differential pressure anchor packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2841949Y true CN2841949Y (en) | 2006-11-29 |
Family
ID=37445835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520084840 Expired - Fee Related CN2841949Y (en) | 2005-06-29 | 2005-06-29 | Reverse differential pressure anchor packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2841949Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107724992A (en) * | 2017-11-27 | 2018-02-23 | 李明 | One kind can desealed water-swelling packer |
| CN113236162A (en) * | 2021-06-09 | 2021-08-10 | 中国石油大学(华东) | Self-unsealing anchoring device for underground hydroforming patching tool |
| CN115370316A (en) * | 2022-09-01 | 2022-11-22 | 惟其信石油机械(天津)有限公司 | Double-anchoring high-pressure packer |
-
2005
- 2005-06-29 CN CN 200520084840 patent/CN2841949Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107724992A (en) * | 2017-11-27 | 2018-02-23 | 李明 | One kind can desealed water-swelling packer |
| CN113236162A (en) * | 2021-06-09 | 2021-08-10 | 中国石油大学(华东) | Self-unsealing anchoring device for underground hydroforming patching tool |
| CN115370316A (en) * | 2022-09-01 | 2022-11-22 | 惟其信石油机械(天津)有限公司 | Double-anchoring high-pressure packer |
| CN115370316B (en) * | 2022-09-01 | 2024-05-28 | 惟其信石油机械(天津)有限公司 | Double-anchoring high-pressure 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061129 |