CN2427625Y - Telescopic and antisticking type fracture packer - Google Patents
Telescopic and antisticking type fracture packer Download PDFInfo
- Publication number
- CN2427625Y CN2427625Y CN 00207148 CN00207148U CN2427625Y CN 2427625 Y CN2427625 Y CN 2427625Y CN 00207148 CN00207148 CN 00207148 CN 00207148 U CN00207148 U CN 00207148U CN 2427625 Y CN2427625 Y CN 2427625Y
- Authority
- CN
- China
- Prior art keywords
- tube
- fracturing
- center tube
- rubber tube
- packer
- 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 - Fee Related
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- Pipe Accessories (AREA)
Abstract
The utility model discloses a telescopic anti-clamp fracturing packer, which solves the problem that a fracturing string can not be taken out because a rubber tube with a bulged shoulder can not be completely retracted after the existing fracturing packer is fractured, and solves the problems of an easily broken copper filter net for filtering sand and fracturing sand easily stacked in the rubber tube. The utility model is characterized in that the telescopic anti-clamp fracturing packer uses a structure that a lower rubber tube can slide axially along a central tube, and the lower part of the lower rubber tube is compensated with axial force by a positional cylinder, so a lower rubber tube seat and the positional cylinder can both slide axially, so that the rubber tube can be caused to telescope axially. The packer has the advantages of high reliability degree, reducing loss, etc., and can be widely used for fracturing under wells.
Description
The utility model relates to pressure break packer in the oil well pipe, belongs to extension type anti-sticking pressure break packer.
Traditional expanding pressure break packer adopts upper and lower glue tube base and upper and lower joint to be rigidly connected with screw thread, and packing element can only carry out expanded radially after being connected with upper and lower glue tube base and can not realize axial stretching; Yet in fracturing process because the inner pressurized of packing element is bigger, the outstanding annular space that must get into the glue tube base and the borehole wall of shoulder after packing element expands, packing element shrinks bad if pressure break finishes the back, shoulder is outstanding effectively not to be regained, when tripping out fracturing string, interactions such as glue tube base, packing element, the borehole wall, fracturing sand form the locking phenomenon that draws tighter and tighter, thereby cause the pressure break back tubing string underground work accident that can't trip out that finishes, this phenomenon is out of shape when serious more outstanding at open hole well or down-hole casing burn into.According to investigations, prolong open hole well pressure break accident rate that oil field causes thus in the northern Shensi up to 20%.In addition, original packer adopts copper wire cloth filter sand structure, because copper wire cloth intensity is lower, bigger at tubing pressure, when especially taking place to reveal at the sealing position, cause the high pressure fracturing fluid to hold sand under the arm copper wire cloth is punctured, fracturing sand is deposited in the hydraulic cavities of packing element and central tube formation, packing element can't shrink, and forms the pressure break accident.
The purpose of this utility model provides a kind of extension type anti-sticking pressure break packer in order to overcome above-mentioned the deficiencies in the prior art exactly.
The purpose of this utility model reaches by the following technical programs: this kind extension type anti-sticking pressure break packer, form by top connection, last glue tube base, upper center tube, packing element, lower rubber cylinder seat and lower contact, be characterized in: the upper center tube lower end is with the lower center tube that is threaded, lower center tube outer wall bigger diameter end and lower rubber cylinder seat inwall are with the sealing ring slipper seal, and miner diameter end and positional cylinder endoporus miner diameter end are with the sealing ring slipper seal; Be placed in stop collar and lower rubber cylinder seat tail end on the lower center tube being threaded, the lower center tube end is with the lower contact that is threaded, and lower contact outer wall upper end and positional cylinder endoporus bigger diameter end are with the sealing ring slipper seal; Between upper and lower central tube and upper and lower joint lining is housed all, lining and upper and lower joint endoporus leave annular space to be threaded between lining endoporus and the upper and lower central tube outer wall, and the position corresponding to lining on the wall of upper and lower central tube all has flowing hole.
The utility model compared with prior art has following advantage: because this kind extension type anti-sticking pressure break packer, changed the structure that is rigidly connected of the upper and lower glue tube base and the upper and lower joint of original expanding pressure break packer, the lower rubber cylinder seat can endwisely slip along central tube, the structure that axial force compensates is carried out with positional cylinder in the bottom and adopt, thereby lower rubber cylinder seat, positional cylinder all can slide vertically, thereby cause that packing element can stretch vertically; Like this, when pressure break has finished fracturing string, if it is bad that packing element shrinks, under the pulling force of tubing string, can force packing element to extend vertically, force the packing element radial contraction, thereby the self-locking that solution glue tube base, packing element, the borehole wall, fracturing sand interact and cause, trip out fracturing string smoothly, reach anti-jamming in advance, reduce the purpose of pressure break accident rate.In addition, the filter sand structure adopts the annular space between the outer wall of lining inwall and upper and lower central tube to carry out filter sand, avoided the copper wire cloth filter sand breakdown after, fracturing sand is deposited in the hydraulic cavities of packing element and central tube formation, packing element can't shrink, and forms the problem of pressure break accident.
Accompanying drawing 1 is a structure chart of the present utility model.
The utility model is described in further detail below in conjunction with accompanying drawing:
By shown in Figure 1, the utility model is made up of top connection 1, last glue tube base 2, upper center tube 3, packing element 5, lower rubber cylinder seat 6 and lower contact 12, be characterized in: upper center tube 3 lower ends are with the lower center tube 7 that is threaded, lower center tube 7 outer wall bigger diameter ends and lower rubber cylinder seat 6 inwalls are with the sealing ring slipper seal, and miner diameter end and positional cylinder 9 endoporus miner diameter ends are with the sealing ring slipper seal; Be placed in stop collar 8 and lower rubber cylinder seat 6 tail ends on the lower center tube 7 being threaded, lower center tube 7 ends are with the lower contact 12 that is threaded, and lower contact 12 outer walls upper end and positional cylinder 9 endoporus bigger diameter ends are with the sealing ring slipper seal; Between upper center tube 3 and the top connection 1 and between lower center tube 7 and the lower contact 12 lining 10 is being housed all, lining 10 and top connection 1 endoporus and with lower contact 12 endoporus all to be threaded, all leave annular space between lining 10 endoporus and upper center tube 3 and lower center tube 7 outer walls, position corresponding to lining 10 on the wall of upper center tube 3 has flowing hole 4, and the position corresponding to lining 10 on the wall of lower center tube 7 has flowing hole 11.
Claims (1)
1, a kind of extension type anti-sticking pressure break packer, form by top connection (1), last glue tube base (2), upper center tube (3), packing element (5), lower rubber cylinder seat (6) and lower contact (12), it is characterized in that: upper center tube (3) lower end is with the lower center tube that is threaded (7), lower center tube (7) outer wall bigger diameter end and lower rubber cylinder seat (6) inwall are with the sealing ring slipper seal, and miner diameter end and positional cylinder (9) endoporus miner diameter end is with the sealing ring slipper seal; Be placed in stop collar (8) and lower rubber cylinder seat (6) tail end on the lower center tube (7) to be threaded, lower center tube (7) is terminal with the lower contact that is threaded (12), and lower contact (12) outer wall upper end and positional cylinder (9) endoporus bigger diameter end are with the sealing ring slipper seal; Between upper and lower central tube (3,7) and upper and lower joint (1,12), lining (10) is housed all, lining (10) and upper and lower joint (1,12) endoporus are to be threaded, leave annular space between lining (10) endoporus and upper and lower central tube (3, the 7) outer wall, the position corresponding to lining (10) on the wall of upper and lower central tube (3,7) all has flowing hole (4,11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00207148 CN2427625Y (en) | 2000-03-24 | 2000-03-24 | Telescopic and antisticking type fracture packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00207148 CN2427625Y (en) | 2000-03-24 | 2000-03-24 | Telescopic and antisticking type fracture packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2427625Y true CN2427625Y (en) | 2001-04-25 |
Family
ID=33574898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00207148 Expired - Fee Related CN2427625Y (en) | 2000-03-24 | 2000-03-24 | Telescopic and antisticking type fracture packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2427625Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101165308B (en) * | 2006-10-18 | 2011-08-10 | 刘宜贵 | Forced slip shrinkage packer |
| CN108060906A (en) * | 2017-11-22 | 2018-05-22 | 王袁媛 | A kind of un-throttled fracturing packer of high-pressure oil-gas well |
-
2000
- 2000-03-24 CN CN 00207148 patent/CN2427625Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101165308B (en) * | 2006-10-18 | 2011-08-10 | 刘宜贵 | Forced slip shrinkage packer |
| CN108060906A (en) * | 2017-11-22 | 2018-05-22 | 王袁媛 | A kind of un-throttled fracturing packer of high-pressure oil-gas well |
| CN108060906B (en) * | 2017-11-22 | 2020-04-28 | 盐城他山石液压机械有限公司 | Non-throttling fracturing packer for high-pressure oil-gas well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |