CN202810774U - Bidirectional self-locking outer packer of casing - Google Patents
Bidirectional self-locking outer packer of casing Download PDFInfo
- Publication number
- CN202810774U CN202810774U CN 201220377388 CN201220377388U CN202810774U CN 202810774 U CN202810774 U CN 202810774U CN 201220377388 CN201220377388 CN 201220377388 CN 201220377388 U CN201220377388 U CN 201220377388U CN 202810774 U CN202810774 U CN 202810774U
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- valve
- spool
- cavity
- packing element
- shear pin
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Abstract
A bidirectional self-locking outer packer of a casing comprises a casing coupling, a central pipe, a locking ring, a rubber sleeve, a valve train assembly, a disconnecting rod, a sealing ring and a casing pup joint. The bidirectional self-locking outer packer of the casing is characterized in that the lower end of the central pipe is connected with the casing coupling in a threaded manner, the upper end of the central pipe is connected with the valve train assembly in a threaded manner, the upper portion of the valve train assembly is connected with the casing pup joint in a threaded manner, the rubber sleeve is arranged on the periphery of the central pipe, the upper end of the rubber sleeve is fixedly connected with the valve train assembly, the lower end of the rubber sleeve is fixedly connected with the locking ring, and sawteeth of the locking ring and sawteeth of the central pipe are fastened with one another so that the locking ring and the central pipe are connected with each other; female threads are arranged on the upper portion and the lower portion of the valve train system, a perpendicular inward opening valve, a check valve, a pressure limiting valve and a liquid inlet channel are arranged in the middle of the valve train assembly side by side, liquid is filled into the rubber sleeve via the liquid inlet channel, a liquid inlet hole of the liquid inlet channel is arranged on the inner periphery of the middle upper portion of the valve train system, the disconnecting rod which is hermetically connected with the sealing ring of the liquid inlet hole is arranged on the liquid inlet hole, and the liquid inlet channel is communicated with the inner periphery of the rubber sleeve via the opening valve, the check valve and the pressure limiting valve; and a channel is further arranged at the upper end of the pressure limiting valve, and the internal pressure of the channel and the internal pressure of the rubber sleeve are balanced.
Description
Technical field
The utility model relates to the Bidirectional self-locking type external casing packer that the packing stratum is used in a kind of drilling completion process.
Background technology
At present, known external casing packer type is to only have the single locking pattern of one group of one-way pressure-limit valve and lock valve control, in common hole condition, existing external casing packer can satisfy instructions for use, and in special subsurface environment, requires packer packing every requiring height, under the hole condition complicated situation, need packer behind spreading, to guarantee bidirectional self-locking, like this, just need a kind of product of bidirectional self-locking of can realizing to satisfy more and more higher instructions for use.
Summary of the invention
The purpose of this utility model provides a kind of Bidirectional self-locking type external casing packer, overcomes the defective that above-mentioned prior art exists.
The technical solution of the utility model is achieved in the following ways:
The utility model comprises that casing coupling, central tube, retaining ring, packing element, valve are assembly, trip arm, sealing ring and casing short joint, it is characterized in that the central tube lower end links to each other with the casing coupling screw thread, the upper end is that the assembly screw thread links to each other with valve, valve is that assembly top links to each other with the casing short joint screw thread, periphery at central tube is provided with packing element, the upper end of packing element is that assembly is fixedly connected with valve, and the lower end of packing element is fixedly connected with retaining ring, and sawtooth interlocks and is connected between retaining ring and the central tube; Valve is that the assembly top and the bottom are provided with box thread, the middle part is provided with side by side vertical inside opens valve, one way valve, pressure limiting valve and the feed pathway of feed liquor in the packing element, the inlet opening of feed pathway is located at week in the middle and upper part, inlet opening is provided with a trip arm that is tightly connected with the inlet opening sealing ring, and feed pathway is by opening Zhou Liantong in valve, one way valve and pressure limiting valve and the packing element; Also has a passage with packing element internal pressure balance in pressure limiting valve upper end.
Open valve and comprise shear pin, valve gap, valve core housing, helical spring, spool and inlet opening, it is in the circular cylindrical cavity set on the assembly that valve core housing is enclosed within valve, valve gap is threaded with cavity, be provided with a shear pin seat that the little lower diameter of upper diameter is large at the valve gap center, shear pin is connected between shear pin seat and the valve gap, in shear pin seat and valve core housing, be provided with the large spool of the little lower diameter of upper diameter, the spool lower, outer perimeter is provided with sealing ring, the lower end is concordant with the valve core housing lower end, to have the feed pathway that is communicated with inlet opening, between shear pin seat and spool reducing step, establish helical spring in the lower end of valve core housing; Bottom at valve core housing is provided with fluid hole.
One way valve comprises valve gap, helical spring and spool, and valve gap and valve are that cavity set on the assembly is threaded, and are provided with a circular support post at the bonnet lower center; Spool is made as diameter and descends greatly little cylindrical of diameter, and the center is provided with spring cavity, and spool lower end cover has a cylindrical rubber pad, in the spring cavity inner sleeve of spool helical spring is arranged, and helical spring is enclosed within on the support column of valve gap; Movable sealing cooperates between spool top and the cavity top, and the spool bottom cooperates with the movable sealing of cavity bottom; Be provided with the feed pathway of a level in the bottom of cavity lower end, feed pathway is communicated with the fluid hole of opening valve; Be provided with a fluid hole at the middle part of cavity.
Pressure limiting valve comprises valve gap, shear pin and spool, and valve gap and valve are that cavity set on the assembly is threaded, and the valve gap center is provided with a spool bore, inlays the shear pin seat in belt spool hole, a center in bonnet lower; The middle part of spool and bottom equal diameters and larger than top and middle part diameter, middle part and bottom periphery are provided with sealing ring, cooperate with the cavity movable sealing, the shear pin seat is injected in the upper end of spool, between shear pin connect, be provided with an inlet opening on the top of the bottom of cavity, be communicated with the fluid hole of one way valve, the middle part of the bottom of cavity be provided with one with packing element in the fluid hole of Zhou Liantong, the cavity bottom be provided with one with packing element in the pressure equalisation passage of Zhou Liantong;
Compared with the prior art the utility model has the following advantages:
1, inner two ends are designed with valve system and mechanical double locking mechanism, can realize bidirectional self-locking behind the packing element spreading, prevent retraction;
2, valve system can be protected and accurately control tool safety is setting effectively;
3, the packing element flare factor is large, but the packing large hole;
4, temperature resistant grade is high, pressure-bearing is poor greatly, permanent set is little;
5, adaptable, can be used for oil, gas, the well of various different conditions.
Description of drawings
Fig. 1-structural representation of the present utility model;
The local structure for amplifying schematic diagram of Fig. 2-trip arm;
Fig. 3-valve is the local structure for amplifying schematic diagram of assembly;
The local structure for amplifying schematic diagram of Fig. 4-retaining ring;
1-casing coupling among the figure, the 2-central tube, the 3-retaining ring, the 4-packing element, the 5-valve is assembly, 6-trip arm, 7-sealing ring, 8-pipeline short circuit;
6-trip arm among Fig. 2, the 7-sealing ring;
5-1-shear pin among Fig. 3,5-2-valve gap, 5-3-valve core housing, 5-4-helical spring, 5-5-spool, 5-6-feed pathway, 5-7-valve gap, 5-8-spool, 5-9-helical spring, 5-10-rubber pad, 5-11-valve gap, 5-12-shear pin, 5-13-spool, 5-14-balance channel;
3-retaining ring among Fig. 4, the 2-central tube.
The specific embodiment
For further disclosing the technical solution of the utility model, elaborate by embodiment below in conjunction with Figure of description:
The utility model comprises that casing coupling 1, central tube 2, retaining ring 3, packing element 4, valve are assembly 5, trip arm 6, sealing ring 7 and casing short joint 8; Central tube 2 lower ends link to each other with casing coupling 1 screw thread, the upper end is that assembly 5 screw threads link to each other with valve, valve is that assembly 5 tops link to each other with casing short joint 8 screw threads, periphery at central tube 2 is provided with packing element 4, the upper end of packing element 4 is that assembly 5 is fixedly connected with valve, the lower end of packing element 4 is fixedly connected with retaining ring 3, and sawtooth interlocks and is connected between retaining ring 3 and the central tube 2; Valve is that assembly 5 top and the bottom are provided with box thread, the middle part is provided with side by side vertical inside opens valve, one way valve, pressure limiting valve and to the feed pathway of packing element 4 interior feed liquors, the inlet opening of feed pathway is located at week in the middle and upper part, inlet opening is provided with a trip arm 6 that is tightly connected with inlet opening sealing ring 7, feed pathway also has one and packing element 4 internal pressure balance channels by opening valve, one way valve and pressure limiting valve and packing element 4 interior Zhou Liantong in the pressure limiting valve upper end.
When using the utility model, packer threaded connecting sleeve tubing string up and down as shown in Figure 1, transfer to and carry out cementing practice in the well behind the design attitude, throw in the sleeve pipe plug from the well head cementing head behind the cemented up and replace mud, shown in Figure 2ly after plug arrives packer trip arm 6 positions, trip arm is interrupted, expose inlet opening, after arriving float collar, plug builds the pressure, it is the valve of opening of assembly that liquid enters the valve that feed pathway 5-6 enters packer again from inlet opening, tubing string shown in Figure 3 continues to boost, after pressure reaches certain numerical value, spool 5-5 presses the shear pin seat to cut off shear pin 5-1, the descending fluid hole of opening of spool, enter one way valve and press rubber pad 5-10, spool 5-8 is up, the fluid hole of opening one way valve enters one way valve, enter interior week of packing element 4 by fluid hole, the sealing cylinder that rises is because the pressure imbalance of beginning pressure limiting valve inlet opening and balance channel 5-14, continue the feed liquor sealing cylinder that rises, after pressure reduction arrived certain numerical value, spool 5-13 was up, and shear pin is cut off, move on the valve rod, make inlet opening and balance channel 5-14 UNICOM, pressure balance, packing element no longer continues to expand.Tubing string pressure release, the one way valve one-way locking that resets under helical spring 5-9 effect prevents the packing element retraction, opens simultaneously valve and also moves down and forever close under the effect of helical spring 5-4.Be designed with pawl on the retaining ring 3 of the packing element other end, can only slide to the packing element direction, oppositely then under inverted tooth-like effect, lock, prevent the packing element retraction.The utility model bidirectional locking has been guaranteed the packing effect.Open that valve gap 5-2 plays position-limiting action to valve core housing 5-3 in the valve, helical spring 5-4 plays reset response to spool; Valve gap 5-7 plays position-limiting action to spool 5-8 and helical spring 5-9 in one way valve, and rubber pad 5-10 seals, and valve gap 5-11 plays position-limiting action to the shear pin seat of shear pin 5-12 in pressure limiting valve.
Claims (4)
1. Bidirectional self-locking type external casing packer, comprise that casing coupling, central tube, retaining ring, packing element, valve are assembly, trip arm, sealing ring and casing short joint, it is characterized in that the central tube lower end links to each other with the casing coupling screw thread, the upper end is that the assembly screw thread links to each other with valve, valve is that assembly top links to each other with the casing short joint screw thread, periphery at central tube is provided with packing element, the upper end of packing element is that assembly is fixedly connected with valve, the lower end of packing element is fixedly connected with retaining ring, and sawtooth interlocks and is connected between retaining ring and the central tube; Valve is that the assembly top and the bottom are provided with box thread, the middle part is provided with side by side vertical inside opens valve, one way valve, pressure limiting valve and the feed pathway of feed liquor in the packing element, the inlet opening of feed pathway is located at week in the middle and upper part, inlet opening is provided with a trip arm that is tightly connected with the inlet opening sealing ring, and feed pathway is by opening Zhou Liantong in valve, one way valve and pressure limiting valve and the packing element; Also has a passage with packing element internal pressure balance in pressure limiting valve upper end.
2. Bidirectional self-locking type external casing packer according to claim 1, it is characterized in that: open valve and comprise shear pin, valve gap, valve core housing, helical spring, spool and inlet opening, it is in the circular cylindrical cavity set on the assembly that valve core housing is enclosed within valve, valve gap is threaded with cavity, be provided with a shear pin seat that the little lower diameter of upper diameter is large at the valve gap center, shear pin is connected between shear pin seat and the valve gap, in shear pin seat and valve core housing, be provided with the large spool of the little lower diameter of upper diameter, the spool lower, outer perimeter is provided with sealing ring, the lower end is concordant with the valve core housing lower end, to have the feed pathway that is communicated with inlet opening, between shear pin seat and spool reducing step, establish helical spring in the lower end of valve core housing; Bottom at valve core housing is provided with fluid hole.
3. Bidirectional self-locking type external casing packer according to claim 1, it is characterized in that: one way valve comprises valve gap, helical spring and spool, valve gap and valve are that cavity set on the assembly is threaded, and are provided with a circular support post at the bonnet lower center; Spool is made as diameter and descends greatly little cylindrical of diameter, and the center is provided with spring cavity, and spool lower end cover has a cylindrical rubber pad, in the spring cavity inner sleeve of spool helical spring is arranged, and helical spring is enclosed within on the support column of valve gap; Movable sealing cooperates between spool top and the cavity top, and the spool bottom cooperates with the movable sealing of cavity bottom; Be provided with the feed pathway of a level in the bottom of cavity lower end, feed pathway is communicated with the fluid hole of opening valve; Be provided with a fluid hole at the middle part of cavity.
4. Bidirectional self-locking type external casing packer according to claim 1, it is characterized in that: pressure limiting valve comprises valve gap, shear pin and spool, valve gap and valve are that cavity set on the assembly is threaded, the valve gap center is provided with a spool bore, inlays the shear pin seat in belt spool hole, a center in bonnet lower; The middle part of spool and bottom equal diameters and larger than top and middle part diameter, middle part and bottom periphery are provided with sealing ring, cooperate with the cavity movable sealing, the shear pin seat is injected in the upper end of spool, between shear pin connect, be provided with an inlet opening on the top of the bottom of cavity, be communicated with the fluid hole of one way valve, the middle part of the bottom of cavity be provided with one with packing element in the fluid hole of Zhou Liantong, the cavity bottom be provided with one with packing element in the pressure equalisation passage of Zhou Liantong.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220377388 CN202810774U (en) | 2012-08-01 | 2012-08-01 | Bidirectional self-locking outer packer of casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220377388 CN202810774U (en) | 2012-08-01 | 2012-08-01 | Bidirectional self-locking outer packer of casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202810774U true CN202810774U (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220377388 Expired - Fee Related CN202810774U (en) | 2012-08-01 | 2012-08-01 | Bidirectional self-locking outer packer of casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202810774U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747979A (en) * | 2012-08-01 | 2012-10-24 | 山东胜油固井工程技术有限公司 | Bidirectional self-locking type external casing packer |
| CN112878958A (en) * | 2021-04-06 | 2021-06-01 | 任丘市恒升石油技术有限公司 | Radial valve system of packer valve joint |
-
2012
- 2012-08-01 CN CN 201220377388 patent/CN202810774U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747979A (en) * | 2012-08-01 | 2012-10-24 | 山东胜油固井工程技术有限公司 | Bidirectional self-locking type external casing packer |
| CN112878958A (en) * | 2021-04-06 | 2021-06-01 | 任丘市恒升石油技术有限公司 | Radial valve system of packer valve joint |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20180801 |