CN203640669U - Balance-type water injection packer - Google Patents
Balance-type water injection packer Download PDFInfo
- Publication number
- CN203640669U CN203640669U CN201320671619.6U CN201320671619U CN203640669U CN 203640669 U CN203640669 U CN 203640669U CN 201320671619 U CN201320671619 U CN 201320671619U CN 203640669 U CN203640669 U CN 203640669U
- Authority
- CN
- China
- Prior art keywords
- balance
- central tube
- compression ring
- water injection
- injection 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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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model relates to a balance-type water injection packer. The water injection packer consists of an upper joint, a central tube, an outer central tube, an upper compression ring, a lower compression ring, a well washing part, a rubber cylinder, a setting part and a locking part, wherein an outer shoulder is arranged at the outer part of the upper end of the outer central tube; a balance mechanism consists of a balance sleeve and a balance piston; the balance sleeve is mounted between the well washing part and the upper compression ring by threads, a pressure transmitting hole is formed in the lower part of the balance sleeve, and the balance piston is mounted in an annular space formed by the outer shoulder of the outer central tube, the upper compression ring and the balance sleeve. Through the adoption of the water injection packer, the force exerted at the upper end and the lower end of the water injection packer can be balanced, the force exerted on the locking part can be eliminated, the bearing capacity is improved, the sealing performance is improved and the period of validity of the packer is prolonged.
Description
Technical field
The utility model relates to the downhole tool that oil extraction in oil field engineering is used, especially a kind of water injection packer.
Background technology
In the oil production engineering in oil field, often use packer, packer is divided into some sections by multiple zone exactly in the time of seperated layer water injection, oil reservoir control water filling is regulated to the instrument of oil reservoir water absorption difference.While needing deblocking, when upper lifting pipe post, lean on packing element and sleeve friction power deblocking.
Most popular Y341 packer at present, because well-flushing part and upper compression ring directly connect together, while making annular pressure (hereinafter to be referred as upper pressure) between packer upper sleeve and oil pipe higher than the annular pressure between parts casing pipe under packer and oil pipe (hereinafter to be referred as pressing down), pressure reduction produces lower thrust to packing element, act on lock portion, make packer hold pressure energy power and reduce, easily lost efficacy, cause separate injection tubing string to lose efficacy.
Summary of the invention
The purpose of this utility model is to hold the upper pressure defect that easily lost efficacy for the existing packer of prior art, and a kind of balanced type water injection packer is provided.
The technical scheme that the utility model adopts is:
By top connection, central tube, exterior central tube, upper compression ring, lower compression ring, well-flushing part, packing element, set part, lock portion forms.Outside, exterior central tube upper end is provided with outer shoulder; Balanced controls are made up of balance set and dummy piston, and balance set is arranged between well-flushing part and upper compression ring by screw thread, and its underpart has pressure transmission hole, and dummy piston is arranged in the annular space of the outer shoulder on exterior central tube, upper compression ring and balance set formation.
The utility model can make the upper and lower two ends of the packing element of water injection packer stress balance, eliminates the power acting on lock portion, has improved packer bearing capacity, sealing performance and period of validity.
Accompanying drawing explanation
Fig. 1: the utility model general structure principle schematic.
In figure: top connection 1, central tube 2, exterior central tube 3, upper compression ring 4, lower compression ring 5, well-flushing part 6, balanced controls 7, balance set 7a, dummy piston 7c, pressure transmission hole 7e, packing element 8, set part 9, lock portion 10 and O shape circle 7b, 7d.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
With reference to accompanying drawing 1, the utility model by top connection 1, central tube 2, exterior central tube 3, upper compression ring 4, lower compression ring 5, well-flushing part 6, packing element 8, set part 9, lock portion 10 forms.Exterior central tube 3 outsides, upper end are provided with outer shoulder; Balanced controls 7 are made up of balance set 7a and dummy piston 7c, balance set 7a is arranged between well-flushing part 6 and upper compression ring 4 by screw thread, its underpart has pressure transmission hole 7e, and dummy piston 7c is arranged in the annular space of outer shoulder, upper compression ring 4 and balance set 7a formation on exterior central tube 3.
Interior O-ring seals 7b and outer O-ring seals 7d are installed on dummy piston 7c.
When upper pressure is when pressing down, pressure reduction produces lower thrust to packing element 8, pressure reduction enters by the pressure transmission hole 7e on balance set 7a in the cavity being made up of balance set 7a, exterior central tube 3, dummy piston 7c, upper compression ring 4 simultaneously, to thrust in dummy piston 7c generation, act on the outer shoulder of exterior central tube 3 upper ends, by being attached thereto lower compression ring 5 together, packing element 8 is produced to upper pulling force, make packing element two ends stress balance Shang Xia 5, elimination acts on the power on lock portion 10, improves packer bearing capacity, sealing and period of validity.
Claims (2)
1. a balanced type water injection packer, by top connection (1), central tube (2), exterior central tube (3), upper compression ring (4), lower compression ring (5), well-flushing part (6), packing element (8), set part (9), lock portion (10) and form, it is characterized in that: exterior central tube (3) outside, upper end is provided with outer shoulder; Balanced controls (7) are made up of balance set (7a) and dummy piston (7c), balance set (7a) is arranged between well-flushing part (6) and upper compression ring (4) by screw thread, its underpart has pressure transmission hole (7e), and dummy piston (7c) is arranged in the annular space of the outer shoulder on exterior central tube (3), upper compression ring (4) and balance set (7a) formation.
2. a kind of balanced type water injection packer according to claim 1, is provided with interior O-ring seals (7b) and outer O-ring seals (7d) on dummy piston (7c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320671619.6U CN203640669U (en) | 2013-10-29 | 2013-10-29 | Balance-type water injection packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320671619.6U CN203640669U (en) | 2013-10-29 | 2013-10-29 | Balance-type water injection packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203640669U true CN203640669U (en) | 2014-06-11 |
Family
ID=50871924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320671619.6U Expired - Fee Related CN203640669U (en) | 2013-10-29 | 2013-10-29 | Balance-type water injection packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203640669U (en) |
-
2013
- 2013-10-29 CN CN201320671619.6U patent/CN203640669U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20151029 |
|
| EXPY | Termination of patent right or utility model |