CN202417413U - Expansion packing and loosening preventive negative pressure generator - Google Patents
Expansion packing and loosening preventive negative pressure generator Download PDFInfo
- Publication number
- CN202417413U CN202417413U CN2012200603043U CN201220060304U CN202417413U CN 202417413 U CN202417413 U CN 202417413U CN 2012200603043 U CN2012200603043 U CN 2012200603043U CN 201220060304 U CN201220060304 U CN 201220060304U CN 202417413 U CN202417413 U CN 202417413U
- Authority
- CN
- China
- Prior art keywords
- jump ring
- fluid cylinder
- hydraulic cylinder
- clamp spring
- cylinder head
- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to an expansion packing and loosening preventive negative pressure generator. The upper portion of a center tube is hermetically connected with an upper joint, a clamp spring jacket is further arranged on the outer periphery of the center tube, and a rubber barrel is disposed between the upper joint and the clamp spring jacket; the other end of the center tube is movably connected with a lower joint, the outer periphery of the lower joint is connected with a lower hydraulic cylinder, one end of the lower hydraulic cylinder is in compaction connection with the lower joint via a protective cap in a threaded manner, and the other end of the lower hydraulic cylinder is covered on a partial outer periphery of the clamp spring jacket; an upper hydraulic cylinder head, an upper hydraulic cylinder seat and a clamp spring seat are successively disposed between the center tube and the clamp spring jacket from top to bottom, a flat-end set screw is disposed on the clamp spring seat in a radial direction, and a plurality of saw-tooth-shaped clamp spring grooves are arranged on the inner periphery of the lower side of the clamp spring jacket; and a lower hydraulic cylinder head is disposed between an end surface of the clamp spring jacket and an end surface of the lower joint, an inner peripheral surface and an outer peripheral surface of the lower hydraulic cylinder head respectively hermetically contact with the center tube and the lower hydraulic cylinder, and an annular groove which is communicated with a cavity of the center tube is arranged on the inner periphery of the lower hydraulic cylinder head. The expansion packing and loosening preventive negative pressure generator not only guarantees sealing and does not unpack when pumping vertically, but also is low in starting pressure owing to the double hydraulic cylinders.
Description
Technical field
The utility model relates to a kind of anti-envelope anticreep negative pressure generator that expands, and is mainly used in 5 of oil field operation
1/ 2 ＂ cased wells.
Background technology
In the past negative pressure generator adopts 3 one group packing element sealing, and packing element is prone to scratch, comes off and card well phenomenon occurs when operation, and it is big to set pressure, must suppress and can set from oil pipe.
Summary of the invention
The technical problem that the utility model will solve provides a kind of anti-envelope anticreep negative pressure generator that expands, and this anti-envelope anticreep negative pressure generator that expands not only guarantees sealing, deblocking not when twitching up and down, and adopt the biliquid cylinder, opening pressure is low.
For overcoming the above problems; The concrete technical scheme of the utility model is following: a kind of anti-envelope anticreep negative pressure generator that expands; Top seal at central tube connects top connection; Excircle at central tube also is provided with the jump ring overcoat, and packing element is arranged between top connection and the jump ring overcoat, and is tightly connected through glue tube base and central tube; The other end at central tube flexibly connects lower contact; Fluid cylinder under the excircle thread seal of lower contact connects; One end of following fluid cylinder is threaded with lower contact through helmet and compresses, and the other end covers on the part excircle of jump ring overcoat, and the end contacts with the cascaded surface of jump ring overcoat simultaneously; Be provided with successively from top to bottom between central tube and the jump ring overcoat fluid cylinder head, on fluid cylinder seat and clip spring seat, on last fluid cylinder head, be provided with cannelure, this cannelure communicates with the cavity of central tube; Clip spring seat be provided with the flush end holding screw in the radial direction, the flush end holding screw is inserted in the shallow slot of central tube, at the excircle of clip spring seat, and is positioned at the outer distolateral jump ring that is provided with of flush end holding screw; Inner periphery is provided with several zigzag jump ring grooves below the jump ring overcoat; Between the end face of the end face of jump ring overcoat and lower contact, be provided with fluid cylinder head down, following fluid cylinder head inside and outside circle side face seals with following fluid cylinder with central tube respectively and contacts, and also is provided with the cannelure that communicates with center tube cavity at the inner periphery that descends the fluid cylinder head.
After the envelope anticreep negative pressure generator that should anti-ly expand adopts said structure to set; Can guarantee sealing, deblocking not when twitching has up and down adopted simultaneously last fluid cylinder head and following fluid cylinder head up and down respectively; And the flush end holding screw is set on clip spring seat, thereby can open with lower pressure.
Description of drawings
Fig. 1 is the structural representation of the anti-envelope anticreep negative pressure generator that expands.
The specific embodiment
As shown in Figure 1; A kind of anti-envelope anticreep negative pressure generator that expands connects top connection 1 in the top seal of central tube 8, also is provided with jump ring overcoat 9 at the excircle of central tube 8; Packing element 2 is arranged between top connection 1 and the jump ring overcoat 9, and is tightly connected through glue tube base 3 and central tube 8; The other end at central tube 8 flexibly connects lower contact 12; Fluid cylinder 10 under the excircle thread seal of lower contact 12 connects; One end of following fluid cylinder 10 is threaded with lower contact 12 through helmet 13 and compresses; The other end covers on the part excircle of jump ring overcoat 9, and the end contacts with the cascaded surface of jump ring overcoat 9 simultaneously; Be provided with successively from top to bottom between central tube 8 and the jump ring overcoat 9 fluid cylinder head 4, on fluid cylinder seat 5 and clip spring seat 6, on last fluid cylinder head 4, be provided with cannelure, this cannelure communicates with the cavity of central tube 8; Clip spring seat 6 be provided with flush end holding screw 16 in the radial direction, flush end holding screw 16 is inserted in the shallow slot of central tube 8, at the excircle of clip spring seat 6, and is positioned at the outer distolateral jump ring that is provided with of flush end holding screw 16; Inner periphery is provided with several zigzag jump ring grooves below jump ring overcoat 9; Between the end face of the end face of jump ring overcoat 9 and lower contact 12, be provided with fluid cylinder head 11 down, following fluid cylinder head 11 inside and outside circle side faces seal with following fluid cylinder 10 with central tube 8 respectively and contact, and also are provided with the cannelure that communicates with center tube cavity at the inner periphery that descends fluid cylinder head 11.
The concrete course of work is: set: suppress from oil pipe, hydraulic pressure water gets into from the inlet opening of central tube 9, promotes fluid cylinder head 11 down, moves compression packing element 2, Seal Oil cover annular space on the jump ring overcoat 9.Jump ring 7 snaps in the jump ring groove of jump ring overcoat 9 locked.It is spacing that following fluid cylinder head 11 is gone to the step place of central tube 9, guarantees that packing element is in best sealing state.Deblocking: the upper lifting pipe post, by the reaction force of packing element 2,16 shear pins are cut off with the frictional force of sleeve pipe, clip spring seat 6 moves down, packing element 2 reinstatement deblockings.
Claims (1)
1. anti-expanding sealed the anticreep negative pressure generator; It is characterized in that: the top seal at central tube (8) connects top connection (1); Excircle at central tube (8) also is provided with jump ring overcoat (9); Packing element (2) is arranged between top connection (1) and the jump ring overcoat (9), and is tightly connected through glue tube base (3) and central tube (8); The other end at central tube (8) flexibly connects lower contact (12); Fluid cylinder (10) under the excircle thread seal of lower contact (12) connects; One end of following fluid cylinder (10) is threaded with lower contact (12) through helmet (13) and compresses; The other end covers on the part excircle of jump ring overcoat (9), and the end contacts with the cascaded surface of jump ring overcoat (9) simultaneously; Between central tube (8) and jump ring overcoat (9), be provided with fluid cylinder head (4) from top to bottom successively, go up fluid cylinder seat (5) and clip spring seat (6), on last fluid cylinder head (4), be provided with cannelure, this cannelure communicates with the cavity of central tube (8); Clip spring seat (6) be provided with flush end holding screw (16) in the radial direction, flush end holding screw (16) is inserted in the shallow slot of central tube (8), the excircle in clip spring seat (6), and be positioned at the outer distolateral jump ring that is provided with of flush end holding screw (16); Below inner periphery at jump ring overcoat (9) is provided with several zigzag jump ring grooves; Between the end face of the end face of jump ring overcoat (9) and lower contact (12), be provided with fluid cylinder head (11) down; Sealing contacts following fluid cylinder head (11) inside and outside circle side face with following fluid cylinder (10) with central tube (8) respectively, also is provided with the cannelure that communicates with center tube cavity at the inner periphery that descends fluid cylinder head (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200603043U CN202417413U (en) | 2012-02-23 | 2012-02-23 | Expansion packing and loosening preventive negative pressure generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200603043U CN202417413U (en) | 2012-02-23 | 2012-02-23 | Expansion packing and loosening preventive negative pressure generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202417413U true CN202417413U (en) | 2012-09-05 |
Family
ID=46742186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200603043U Expired - Lifetime CN202417413U (en) | 2012-02-23 | 2012-02-23 | Expansion packing and loosening preventive negative pressure generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202417413U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944370A (en) * | 2012-10-31 | 2013-02-27 | 四川安东油气工程技术服务有限公司 | Pressure device for airtightness detection of casing and manufacturing method thereof |
-
2012
- 2012-02-23 CN CN2012200603043U patent/CN202417413U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944370A (en) * | 2012-10-31 | 2013-02-27 | 四川安东油气工程技术服务有限公司 | Pressure device for airtightness detection of casing and manufacturing method thereof |
| CN102944370B (en) * | 2012-10-31 | 2015-03-25 | 四川安东油气工程技术服务有限公司 | Pressure device for airtightness detection of casing and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120905 |
|
| CX01 | Expiry of patent term |