CN202152662U - Water hammer resistant liquid inlet device of expansion packer - Google Patents
Water hammer resistant liquid inlet device of expansion packer Download PDFInfo
- Publication number
- CN202152662U CN202152662U CN201120250383XU CN201120250383U CN202152662U CN 202152662 U CN202152662 U CN 202152662U CN 201120250383X U CN201120250383X U CN 201120250383XU CN 201120250383 U CN201120250383 U CN 201120250383U CN 202152662 U CN202152662 U CN 202152662U
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- Prior art keywords
- annular
- feed liquor
- upper center
- piston
- center tube
- Prior art date
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- Expired - Lifetime
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 title abstract description 10
- 239000010985 leather Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003129 oil well Substances 0.000 abstract 1
- 238000012856 packing Methods 0.000 description 17
- 238000007789 sealing Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000001739 rebound effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Details Of Valves (AREA)
Abstract
The expanding packer water hammer resisting liquid inlet device is specially used in oil well expanding packer. An annular setting starting piston is arranged in an annular space between the upper outer sleeve and the upper central pipe; the inner wall of the setting starting piston is opposite to the liquid inlet small hole of the central tube, and an annular filter screen is arranged at the lower end of the setting starting piston and in an annular space between the upper outer sleeve and the upper central tube; the lower part of the setting starting piston is provided with an annular setting locking joint; one-way valve holes are uniformly distributed on the upper end surface of the setting locking joint, and a one-way liquid inlet valve assembly is fixed in each one-way valve hole; the bottom of the one-way valve hole is provided with an axial through hole. The effect is as follows: the water hammer resistance of the expansion packer is enhanced, the risk that the expansion packer is easy to seat midway is reduced, and the use reliability of the expansion packer is improved.
Description
Technical field
The utility model relates to petroleum gas down-hole technical field of tools.Being particularly related to the feeding device that a kind of down-hole inflatable packer is used, is the unidirectional feeding device of a kind of anti-water attack.
Background technology
At present, the inflatable packer that uses in measure of industrial gas oil oil-water well and the production has characteristics such as good airproof performance, withstand voltage difference is high, the sealing time is long, has become one of important downhole tool of shutoff operation.Existing inflatable packer feed liquor valve adopts annular feed liquor valve mostly, and the maximum characteristics of this valve are that the inlet area is big, and feed liquor speed is fast.But in practical application, have following problem: (1) owing to non-watertight the hitting of annular feed liquor valve, the water attack that packer produces in the process of going into the well acts directly on the packing element assembly, causes the packing element bulging.The packing element of bulging is gone into the well in the process inevitably and casing wall or wall friction, not only increases well resistance under the packer, quickens the packing element wearing and tearing, but also possibly cause packer to set midway, causes operation to fail.(2) annular feed liquor valve closing motion is slow, stops annotating that the hydraulic slip amount is big in a flash, has a strong impact on the packer sealing effect.(3) because annular feed liquor valve seal area is bigger, causing missing risk increases, and long-time pressurize difficulty causes packer packing for a long time stratum.Owing to there are the problems referred to above, make the dependability of inflatable packer receive tremendous influence, largely limit its scope of application.
The utility model content
The purpose of the utility model is: provide a kind of inflatable packer anti-water attack feeding device, solve water hammer and cause packing element to shift to an earlier date bulging, problem such as set midway; And the pressure loss when having overcome annular plate valve and closing, be difficult for problems such as sealing, pressurize difficulty.
The technical scheme that the utility model adopts is: the anti-water attack feeding device of inflatable packer; Mainly by last overcoat, set start piston, filter screen, unidirectional feed liquor valve assembly, set lock-on connection, upper center tube is formed; It is characterized in that: between overcoat and the upper center tube annular space is arranged on columnar; What an annular was arranged in the annular space between last overcoat and upper center tube sets the startup piston, and sets and start piston and be fixed on the outer casing inner wall through shear pin; Radially feed liquor aperture is arranged on the upper center tube wall, and it is relative with the feed liquor aperture of central tube to set the inwall that starts piston, blocks the feed liquor aperture, and the interior highly pressurised liquid of upper center tube can not be got in the annular space between overcoat and the upper center tube.The filter screen that annular is arranged in lower end that sets the startup piston and the annular space between last overcoat and upper center tube;
Start the lock-on connection that sets that lower part of piston has annular setting, set in the annular space of lock-on connection between last overcoat and upper center tube; Be evenly distributed with unidirectional valve opening in the upper surface that sets lock-on connection, be fixed with unidirectional feed liquor valve assembly in the unidirectional valve opening; Said unidirectional feed liquor valve assembly has screw, valve seat, leather cup assembly, steel ball, spring base and spring from bottom to top; Screw is at unidirectional valve opening top, and screw has centre bore; An axially extending bore is arranged in the bottom of unidirectional valve opening.There is external screw thread the lower end that sets lock-on connection, sets lock-on connection during installation and links to each other with the cartridge assembly through external screw thread.
The beneficial effect of the utility model: the anti-water attack feeding device of the utility model inflatable packer is applied in existing inflatable packer.Set the startup piston in this unidirectional feed liquor valve assembly front increase, be highly resistant to the impact forces that water attack produces.Successfully having solved water hammer causes packing element to shift to an earlier date bulging, problem such as set midway; And the pressure loss when having overcome annular plate valve and closing, be difficult for problems such as sealing, pressurize difficulty.Start piston solution water attack problem owing to adopt to set, anti-water attack ability is strong, simple in structure; Unidirectional feed liquor valve assembly not only starts flexibly, bearing capacity is high; And the feed liquor runner is little, and such being designed with is beneficial to the slow feed liquor of low discharge makes the packing element bulging abundant, more helps reducing the closed check valve wastage of moment, guarantees to set pressure loss minimum, satisfies the requirement of packer long term seal.Improved the anti-water attack ability of existing inflatable packer, solved the annular plate valve turn-off transient and set problems such as pressure decline, long term seal difficulty.
Description of drawings
Fig. 1 is the inflatable packer the first half structural profile sketch map that has the anti-water attack feeding device of inflatable packer.
Fig. 2 is inflatable packer the latter half structural profile sketch map.
Among the figure, 1-cartridge assembly, the 2-retaining mechanism, 3-deters mechanism, the last overcoat of 4-, 5-sets the startup piston, the 6-filter screen, the 7-screw, the 8-valve seat, 9-leather cup assembly, the 10-steel ball, the 11-spring base, the 12-spring, 13-sets lock-on connection, the 14-upper center tube.
The specific embodiment
Embodiment 1: with an inflatable packer that has the anti-water attack feeding device of inflatable packer is example, and the utility model is done further explain.
Consult Fig. 2.The anti-water attack feeding device of inflatable packer is installed on the inflatable packer.Top connection is arranged at the top at the anti-water attack feeding device of inflatable packer, and its underpart connects cartridge assembly 1, retaining mechanism 2, deters mechanism 3.Consult Fig. 1.The anti-water attack feeding device of inflatable packer is installed in cartridge assembly 1 upper end of inflatable packer.
Consult Fig. 1.The anti-water attack feeding device of the utility model inflatable packer, mainly by last overcoat 4, set start piston 5, filter screen 6, unidirectional feed liquor valve assembly, set lock-on connection 13, upper center tube 14 is formed.
Between overcoat 4 and the upper center tube 14 annular space is arranged on columnar; There is setting of an annular to start piston 5 in the annular space between last overcoat 4 and upper center tube 14, and set and start piston 5 and be fixed on overcoat 4 inwalls through four shear pins.On upper center tube 14 walls, be evenly distributed with four radially feed liquor apertures; The feed liquor aperture that sets the inwall that starts piston 5 and central tube 14 is relative; Block the feed liquor aperture, the highly pressurised liquid in the upper center tube 14 can not be got in the annular space between overcoat 4 and the upper center tube 14.The filter screen 6 that layer of annular is arranged in lower end that sets startup piston 5 and the annular space between last overcoat 4 and upper center tube 14.
Set lock-on connection 13 what set that an annular arranged at the bottom that starts piston 5, set in the annular space of lock-on connection 13 between last overcoat 4 and upper center tube 14.Be evenly distributed with four axial unidirectional valve openings in the upper surface that sets lock-on connection 13, be fixed with unidirectional feed liquor valve assembly in the unidirectional valve opening; Order is equipped with screw 7, valve seat 8, leather cup assembly 9, steel ball 10, spring base 11 and spring 12 on the said unidirectional feed liquor valve assembly; Screw 7 is fixed on unidirectional valve opening top, and screw 7 has centre bore.An axially extending bore is arranged in the bottom of unidirectional valve opening.There is external screw thread the lower end that sets lock-on connection 13, sets lock-on connection 13 during installation and links to each other with cartridge assembly 1 through external screw thread.
The operating principle of the utility model: inflatable packer is before going into the well; Setting startup piston 5 is fixed on the overcoat 4 by shear pin; And with the feed liquor aperture of central tube 14 over against, block inlet opening and do not allow that liquid arrive unidirectional feed liquor valve assembly in the packer upper center tube 14.Set to start and unidirectional feed liquor valve assembly be installed below the piston 5, this assembly by screw 7, valve seat 8, leather cup assembly 9, steel ball 10, spring base 11, spring 12, set lock-on connection 13 and " O " RunddichtringO is formed.When in packer is being gone into the well process, having water hammer to take place; The impact force that water hammer produces the at first feed liquor aperture through upper center tube 14 acts on to set and starts on the piston 5; Be fixed on overcoat 4 inwalls by shear pin owing to set startup piston 5, so the active force that water attack produces can not act on the unidirectional feed liquor valve assembly, promptly the aneroid physical efficiency gets into the packing element assembly under water hammer; Cause the packing element bulging or set, thereby play anti-water hammer.
When packer need set to the precalculated position down; In the packer central tube, build the pressure; Pressure is delivered to and sets when starting piston 5, produces thrust upwards owing to the above and below that sets startup piston 5 is designed with difference in areas, cuts off shear pin when thrust arrives certain value; Set startup piston 5 and move up, the liquid in the upper center tube 14 of packer just can get into through the feed liquor aperture of central tube in the unidirectional feed liquor valve assembly.Liquid is through after the filtration of filter screen 6, arrives valve seat 8 through the endoporus of screw 7, backs down leather cup assembly 9 and compresses spring 12 and continue to move ahead.Get in the packing element assembly by setting lock-on connection 13, the bulging packing element makes packer reach the purpose of packing oil-gas-water layer section again.
After the packing element bulging is abundant, stop to build the pressure; Leather cup assembly 9 forms sealing with valve seat 8 under the rebound effect power of spring 12; Make the liquid in the packing element assembly can not be back to central tube 14, let the packing element assembly be in the bulging state all the time, make packer reach the purpose of long-term packing oil-gas-water layer.
Claims (1)
1. anti-water attack feeding device of inflatable packer; Mainly by last overcoat (4), set start piston (5), filter screen (6), unidirectional feed liquor valve assembly, set lock-on connection (13), upper center tube (14) is formed; It is characterized in that: between overcoat (4) and the upper center tube (14) annular space is arranged on columnar; There is setting of an annular to start piston (5) in the annular space between last overcoat (4) and upper center tube (14), and set and start piston (5) and be fixed on overcoat (4) inwall through shear pin; On upper center tube (14) wall, radially feed liquor aperture is arranged; It is relative with the feed liquor aperture of central tube (14) to set the inwall that starts piston (5), annular filter screen (6) is arranged setting in the lower end that starts piston (5) and the annular space between last overcoat (4) and upper center tube (14);
Set lock-on connection (13) what set that annular arranged at the bottom that starts piston (5), set in the annular space of lock-on connection (13) between last overcoat (4) and upper center tube (14); Upper surface setting lock-on connection (13) is evenly distributed with unidirectional valve opening, is fixed with unidirectional feed liquor valve assembly in the unidirectional valve opening; Said unidirectional feed liquor valve assembly has screw (7), valve seat (8), leather cup assembly (9), steel ball (10), spring base (11) and spring (12) from bottom to top; Screw (7) is fixed on unidirectional valve opening top, and screw (7) has centre bore; An axially extending bore is arranged in the bottom of unidirectional valve opening; There is external screw thread the lower end that sets lock-on connection (13), sets lock-on connection (13) during installation and links to each other with cartridge assembly (1) through external screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120250383XU CN202152662U (en) | 2011-07-15 | 2011-07-15 | Water hammer resistant liquid inlet device of expansion packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120250383XU CN202152662U (en) | 2011-07-15 | 2011-07-15 | Water hammer resistant liquid inlet device of expansion packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202152662U true CN202152662U (en) | 2012-02-29 |
Family
ID=45693162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120250383XU Expired - Lifetime CN202152662U (en) | 2011-07-15 | 2011-07-15 | Water hammer resistant liquid inlet device of expansion packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202152662U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401909A (en) * | 2014-08-21 | 2016-03-16 | 中国石油天然气股份有限公司 | Expanding packer and setting method thereof |
| CN110318703A (en) * | 2018-03-28 | 2019-10-11 | 中石化石油工程技术服务有限公司 | A kind of minor diameter well cementation packer |
| CN111734318A (en) * | 2020-06-30 | 2020-10-02 | 合力（天津）能源科技股份有限公司 | Multifunctional hydraulic safety device for oil pipe |
-
2011
- 2011-07-15 CN CN201120250383XU patent/CN202152662U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401909A (en) * | 2014-08-21 | 2016-03-16 | 中国石油天然气股份有限公司 | Expanding packer and setting method thereof |
| CN105401909B (en) * | 2014-08-21 | 2018-04-03 | 中国石油天然气股份有限公司 | Expanding packer and setting method thereof |
| CN110318703A (en) * | 2018-03-28 | 2019-10-11 | 中石化石油工程技术服务有限公司 | A kind of minor diameter well cementation packer |
| CN111734318A (en) * | 2020-06-30 | 2020-10-02 | 合力（天津）能源科技股份有限公司 | Multifunctional hydraulic safety device for oil pipe |
| CN111734318B (en) * | 2020-06-30 | 2022-01-18 | 合力（天津）能源科技股份有限公司 | Multifunctional hydraulic safety device for oil pipe |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120229 |