CN205400663U - Packer is protected to sleeve pipe for fracturing - Google Patents
Packer is protected to sleeve pipe for fracturing Download PDFInfo
- Publication number
- CN205400663U CN205400663U CN201620185805.2U CN201620185805U CN205400663U CN 205400663 U CN205400663 U CN 205400663U CN 201620185805 U CN201620185805 U CN 201620185805U CN 205400663 U CN205400663 U CN 205400663U
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- leather cup
- central canal
- lock
- lock ring
- lock tube
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Abstract
The utility model discloses a packer is protected to sleeve pipe for fracturing, it includes: top connection, center tube, back of the body cap, encircle packing element on the center tube, cover on the center tube and compress tightly the packing element the leather cup sheath, with leather cup sheath threaded connection's supporting sleeve, vulcanize piston on the center tube of leather cup as an organic whole, lock tube, cover with the supporting sleeve, is connected piston and lock tube the start -up nail, encircle lock ring base on the center tube, overlap catch on lock ring base, and center tube lower extreme threaded connection just hug closely lock ring base's lower clutch and sealing element. The utility model discloses satisfy oil field volume fracturing and pour into the technology demand of fracturing fluid, open flow from the big discharge capacity well -flushing of casing annulus, from the big discharge capacity of oil pipe into, very high pushing down can be born in special design's packing element combination, can protect the upper portion sleeve pipe well, at the in -process of going into the well, the protection leather cup does not receive the damage, the instrument relies on hydraulic to sit and seals a deblocking, go into the pit shaft down after, can use repeatedly, lose sealedly completely until primary cup and packing element.
Description
Technical field
This utility model relates to a kind of pressure break casing protective packer.
Background technology
In recent years, owing to continually developing of high benefit oil gas field is reduced day by day with high-grade oil reservoir, the demand of oil is rapidly increased by countries in the world, and exploration and development simultaneously and drilling technology level improve constantly, facts have proved in a large number: horizontal well development technology has very big exploitation advantages, is widely applied.Wherein yield does not reach the horizontal well of requirement, it is necessary to carry out well stimulation transformation, proposes double; two envelope single deck tape-recorder Staged Fracturing Technique In Horizontal Wells technology on this basis.At present, conventional hydraulic packer is in the process of going into the well, and due to being relatively large in diameter of leather cup, leather cup can not well be protected, it is easy to cause the scratch of leather cup, damages leather cup, causes packer to lose efficacy；Under existing tool condition, upper sleeve can not be effectively protected.
Utility model content
For above deficiency, the purpose of this utility model is to provide a kind of pressure break casing protective packer, and protection leather cup is without damage, and protection upper sleeve by high pressure effect, Light deformation is not occurred.
The technical solution of the utility model is: a kind of pressure break casing protective packer, it includes the top connection of built-in oil pipe female thread, the central canal that upper end is connected with top connection screw thread, the back of the body cap that upper end is connected with top connection screw thread, ring packing element on central canal, it is enclosed within central canal and compresses the leather cup sheath of packing element, the splicing sleeve threadeded with leather cup sheath, the leather cup being integrated is vulcanized with splicing sleeve, shrink the lock tube of leather cup shirt rim, it is enclosed within the piston on central canal, the startup connecting piston and lock tube is followed closely, ring lock ring seat on central canal, it is enclosed within the lock ring on lock ring seat, threaded with central canal lower end and be close to the lower contact of lock ring seat, and potted component.
On the basis of technique scheme, farther include following attached technical scheme:
The free external diameter of described leather cup is more than more than casing inner diameter 4mm, and leather cup imposes restrictions in leather cup sheath and lock tube when tool assemble, and leather cup external diameter is contracted to less than casing inner diameter 6～8mm, and leather cup is positioned at the rear of packing element simultaneously.
Described lock tube is gone into the well in process at instrument, shrinks leather cup shirt rim intracavity within it, and is discharged by leather cup after holding high pressure first.
Described lock ring has unidirectional tooth, and lock tube has matched teeth groove, only along unidirectional generation relative motion between lock ring and lock tube.
Having step on described central canal, splicing sleeve is spacing by the step of central canal, and lock ring seat is positioned by the step on central canal and lower contact, and center pipe axle upwards has multiple by-pass prot simultaneously.
Between described central canal and lock tube, between central canal and piston, between piston and lock tube, it is provided with potted component.
Due to the utilization of technique scheme, this utility model compared with prior art has the advantage that
1, meet oil field volume fracturing from sleeve pipe huge discharge, well-flushing, inject the process requirements of fracturing fluid, open flow from oil pipe huge discharge；
2, in the process of going into the well, protection leather cup is without damage；
3, instrument can bear significantly high lower pressure reduction, it is possible to effectively protects upper sleeve；
4, instrument relies on fluid power to set deblocking, after lower going-into-well cylinder, it is possible to Reusability, until sealing cup and packing element lose sealing completely.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, this utility model is further described:
Fig. 1 is partial sectional view of the present utility model；
Fig. 2 is this utility model sectional view when being applied in oil pipe and be in the first state；
Fig. 3 is this utility model sectional view when being applied in oil pipe and be in the second state；
Fig. 4 is this utility model sectional view when being applied in oil pipe and be in the third state.
Detailed description of the invention
nullEmbodiment: with reference to shown in Fig. 1-4，This utility model provides the specific embodiment of a kind of pressure break casing protective packer，Comprising: the top connection 1 of built-in oil pipe female thread、The central canal 4 that upper end is connected with top connection 1 by screw thread、It is loaded on the back of the body cap 2 that central canal 4 is outer and is threaded connection with top connection 1、Ring is on central canal 4 and against at least two packing elements 3 carrying on the back cap 2、It is loaded on central canal 4 and against the leather cup sheath 5 of packing element 3、The splicing sleeve 6 being threaded connection with leather cup sheath 5 and topped bar spacing by central canal 4、One end is retracted in leather cup sheath 5 inner chamber and the leather cup 7 that is resisted against on splicing sleeve 6 at least partly、Shrink leather cup 7 other end and connect piston 9 lower end the lock tube 10 threadeded with central canal 4、The startup nail 8 that piston 9 and lock tube 10 are fixed、It is arranged at lock tube 10 inner chamber and the lock ring seat 12 threadeded with central canal 4、Lock ring 13 in inner chamber between lock ring seat 12 and lock tube 10、Threaded with central canal 4 and against the lower contact 14 of lock ring seat 12、And it is arranged on the potted component 11 between an element.Wherein between central canal 4 and lock tube 10, between central canal 4 and piston 9, between piston 9 and lock tube 10, it is provided with potted component 11.Leather cup 7 is positioned at the rear of packing element 3 simultaneously, thus whole packer can bear significantly high lower pressure reduction.Lock ring 13 is provided with unidirectional tooth, and has matched teeth groove on lock tube 10, can only along unidirectional generation relative motion between lock ring 13 and lock tube 10, it is ensured that lock tube 10 can not reset, it is prevented that lock tube 10 contacts for 7 two times with leather cup and produces to hinder to annulus fluid flowing.
Enter up and down in sleeve pipe as in figure 2 it is shown, this utility model is connected to oil pipe string.
As it is shown on figure 3, when entering precalculated position under pipe string, highly pressurised liquid enters from the by-pass prot of central canal 4 and promotes piston 9, cuts off startup nail 8, and lock tube 10 is descending, and is stapled the unidirectional tooth locking of 13 and can not reset, and leather cup 7 discharges.
As shown in Figure 4, during fracturing work, highly pressurised liquid acts on below leather cup 7, leather cup 7 radial dilatation also upwards jumps, drive splicing sleeve 6 to promote leather cup sheath 5 up, axially compression packing element 4, after packing element 4 radial dilatation, be in close contact sleeve pipe, Seal Oil set annular space common with leather cup 7, it is achieved setting of packer.Packing element 4 being helped envelope effect due to the one-way sealing characteristic of leather cup 7 and when holding high pressure, this kind seals structure can bear significantly high bottom high pressure.When laying down highly pressurised liquid reacting cycle well-flushing, it may be achieved the deblocking of packer.
This utility model compared with prior art has the advantage that
1, meet oil field volume fracturing from sleeve pipe huge discharge, well-flushing, inject the process requirements of fracturing fluid, open flow from oil pipe huge discharge；
2, in the process of going into the well, protection leather cup is without damage.
3, instrument can bear significantly high lower pressure reduction, it is possible to effectively protects upper sleeve.
4, instrument relies on fluid power to set deblocking, after lower going-into-well cylinder, it is possible to Reusability, until sealing cup and packing element lose sealing completely.
Certain above-described embodiment only for technology of the present utility model design and feature are described, its object is to allow person skilled in the art will appreciate that content of the present utility model and to implement according to this, can not limit protection domain of the present utility model with this.All equivalent transformations done according to the spirit of this utility model main technical schemes or modification, all should be encompassed within protection domain of the present utility model.
Claims (6)
1. a pressure break casing protective packer, it is characterized in that comprising: the top connection of built-in oil pipe female thread, the central canal that upper end is connected with top connection screw thread, the back of the body cap that upper end is connected with top connection screw thread, ring packing element on central canal, it is enclosed within central canal and compresses the leather cup sheath of packing element, the splicing sleeve threadeded with leather cup sheath, the leather cup being integrated is vulcanized with splicing sleeve, shrink the lock tube of leather cup shirt rim, it is enclosed within the piston on central canal, the startup connecting piston and lock tube is followed closely, ring lock ring seat on central canal, it is enclosed within the lock ring on lock ring seat, threaded with central canal lower end and be close to the lower contact of lock ring seat, and potted component.
2. a kind of pressure break casing protective packer according to claim 1; it is characterized in that: the free external diameter of described leather cup is more than more than casing inner diameter 4mm; and leather cup imposes restrictions in leather cup sheath and lock tube when tool assemble; and leather cup external diameter is contracted to less than casing inner diameter 6～8mm, leather cup is positioned at the rear of packing element simultaneously.
3. a kind of pressure break casing protective packer according to claim 2, it is characterised in that: described lock tube is gone into the well in process at instrument, shrinks leather cup shirt rim intracavity within it, and is discharged by leather cup after holding high pressure first.
4. a kind of pressure break casing protective packer according to claim 3, it is characterised in that: described lock ring has unidirectional tooth, and lock tube has matched teeth groove, only along unidirectional generation relative motion between lock ring and lock tube.
5. a kind of pressure break casing protective packer according to claim 1 or 2 or 3 or 4; it is characterized in that: described central canal has step; splicing sleeve is spacing by the step of central canal, and lock ring seat is positioned by the step on central canal and lower contact, and center pipe axle upwards has multiple by-pass prot simultaneously.
6. a kind of pressure break casing protective packer according to claim 5, it is characterised in that: between described central canal and lock tube, between central canal and piston, between piston and lock tube, it is provided with potted component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620185805.2U CN205400663U (en) | 2016-03-10 | 2016-03-10 | Packer is protected to sleeve pipe for fracturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620185805.2U CN205400663U (en) | 2016-03-10 | 2016-03-10 | Packer is protected to sleeve pipe for fracturing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205400663U true CN205400663U (en) | 2016-07-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620185805.2U Active CN205400663U (en) | 2016-03-10 | 2016-03-10 | Packer is protected to sleeve pipe for fracturing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205400663U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109838222A (en) * | 2017-11-28 | 2019-06-04 | 中国石油化工股份有限公司 | Fixed point water-jet acid fracturing device and method for ultradeep well |
-
2016
- 2016-03-10 CN CN201620185805.2U patent/CN205400663U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109838222A (en) * | 2017-11-28 | 2019-06-04 | 中国石油化工股份有限公司 | Fixed point water-jet acid fracturing device and method for ultradeep well |
| CN109838222B (en) * | 2017-11-28 | 2021-05-25 | 中国石油化工股份有限公司 | Fixed-point hydraulic jet acid fracturing device and method for ultra-deep well |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |