CN202451105U - End part outburst-prevention protection device for self-expanding packer - Google Patents
End part outburst-prevention protection device for self-expanding packer Download PDFInfo
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- CN202451105U CN202451105U CN2012200308926U CN201220030892U CN202451105U CN 202451105 U CN202451105 U CN 202451105U CN 2012200308926 U CN2012200308926 U CN 2012200308926U CN 201220030892 U CN201220030892 U CN 201220030892U CN 202451105 U CN202451105 U CN 202451105U
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- self
- protrusion
- dispelling
- ring
- expanding
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Abstract
The utility model provides an end part outburst-prevention protection device for a self-expanding packer. The end part outburst-prevention protection device comprises outburst-prevention rings, wherein the outburst-prevention rings are used for being respectively annularly arranged on both ends of a self-expanding rubber cylinder of the self-expanding packer; each outburst-prevention ring comprises a base ring part and a plurality of slat parts, the slat parts extend out of the base ring part along the longitudinal direction of a base pipe of the self-expanding packer, and the slat parts are mutually partially overlapped with adjacent slat parts in the peripheral direction of the base pipe. By adopting the end part outburst-prevention protection device, the self-expanding rubber cylinder of the self-expanding packer can be prevented from being extruded and torn, and liquid inside a well can still be absorbed by both ends of the self-expanding rubber cylinder can still after the both ends are expanded, and therefore, the compaction degree of the wall of the well is maintained and the reliable and stable annular pack is realized.
Description
Technical field
The utility model relates to a kind of self-expanding packer, in particular for the end protrusion-dispelling protective device of self-expanding packer.
Background technology
Packer is widely used in comprising in many technological measures such as drilling well, completion, reservoir reconstruction in petroleum exploration and development as a kind of underground work instrument that plays zone isolation.Advantages such as the self-expanding packer is a kind of self-excitation expansion sealed packer that does not have mechanical moving component and do not need setting tool, possesses construction technology and simplifies, and operating efficiency is high, and compliance is strong are specially adapted to the completion practice of complex hydrocarbon well.
CN200920106033.9 discloses a kind of self-expanding formula packer.This self-expanding packer utilization is met the characterization of adsorption of liquid (oil or water) expanded rubber and is realized the bloated envelope of packing element, and passes through the axial limiting that jump ring is realized packing element.Yet in this limit method, can go out greatly than the external diameter of baffle ring a lot, thereby can't play support rubber, prevent the effect that rubber is extruded at expand the be honored as a queen external diameter of packing element of packing element.In addition, utilize the fixedly mode of baffle ring of jump ring, complex structure and be not easy to install has weakened the intensity of parent tube.Whole packer bearing capacity is limited.
CN200920278348.1 discloses a kind of packer retainer ring and has had the chance liquid self-expanding packer of this retainer ring.In this self-expanding packer, the mode that is employed in the fixing a plurality of spacing rings in compartment of terrain on the packing element prevents the packing element bulge, makes the fixed part length vertically of retainer ring equal the length of packer end simultaneously.Yet should still only work by anti-lug structure,, promptly can occur the risk that rubber squeezes outward in case packing element expands and contacts with the borehole wall in the starting stage of the bloated envelope of packing element.In addition, a plurality of retainer rings have also reduced the seal length and the sealing performance thereof of packing element.
US7806193 also discloses a kind of chance oil swell packers that has the thermoplastic end retainer.When going into well, this end retainer can be protected packing element; After expansion, this end retainer provides certain mechanical support for the Flexible element of meeting the oil expansion, axially extrudes to limit it, improves sealability.Though this is relatively simple for structure, yet end ring can not touch the borehole wall after setting, and rubber still has and extrudes, the possibility of stuff up a crack, and then influences sealability.
Therefore, the end protrusion-dispelling protective device of self-expanding packer of the prior art can't prevent effectively that all rubber is extruded and tears, and its sealability all can not be satisfactory.
The utility model content
Consider the above technical problem that exists in the prior art; A purpose of the utility model provides a kind of end protrusion-dispelling protective device that is used for the self-expanding packer, and it can prevent that rubber is extruded and tears when the packing element of self-expanding packer is met expansion of liquids.Another purpose of the utility model provides a kind of end protrusion-dispelling protective device that is used for the self-expanding packer, its packing element that can make the self-expanding packer expand be honored as a queen still can absorption well in liquid.
According to the utility model; A kind of end protrusion-dispelling protective device that is used for the self-expanding packer is provided; Comprise being used for respectively that each said protrusion-dispelling ring comprises the basic ring part around the protrusion-dispelling ring on the two ends of the self-expanding packing element that is installed in said self-expanding packer, and a plurality of circular plate portion that from said basic ring part, comes out along the longitudinal extension of said self-expanding packer; Wherein, each said circular plate portion is upwards partly overlapping each other with adjacent circular plate portion in the week of said parent tube.
According to the utility model, the protrusion-dispelling ring has a plurality of circular plate portions that from the basic ring part, longitudinally stretch out.Like this, be lowered into that precalculated position, shaft bottom and packing element touch liquid (oil or water) and when expanding, owing to be looped around the existence of the protrusion-dispelling ring on the packing element two ends, the speed of expansion at packing element two ends will be less than the speed of expansion of intermediate portion when packer.When packing element has absorbed oil or the water of capacity, so the two ends of packing element also can strut the circular plate portion of protrusion-dispelling ring and make it and expand.In this expansion process, consider that circular plate portion one end is fixed on that basic ring is partly gone up and the other end is a free end, circular plate portion can closely be fitted on the packing element all the time, prevents that packing element is extruded, tears.Therefore, the bearing capacity of packer is improved.
Therefore in addition,, between them, still can be formed with flow channels, make that liquid can penetrate in the packing element through these flow channels in the well because each circular plate portion upwards is being arranged to partly overlappingly to each other in week.Therefore, the two ends of packing element still can absorption well after the envelope that expands in liquid, thereby kept degree of compaction, the annular space packing of realization reliable and stable to the borehole wall.So just, can realize the permanent sealing of packing element, improve the sealability and the reliability of packer greatly.In addition, the structure of whole packer is also very compact, is convenient to more also can be applicable to multiple completion mode into well.
In one embodiment, between adjacent two circular plate portions, formed flow channels.Preferably, each circular plate portion not by adjacent slat part region covered on be provided with at least one flowing hole.Packing element two ends that this flowing hole further strengthened the self-expanding packer ability of liquid in the absorption well after the envelope that expands is provided.
In one embodiment, the overlapping area between the adjacent slat part be half of area of each circular plate portion.
Scratch in order to protect packing element and protrusion-dispelling ring to avoid the borehole wall when the lower going-into-well, the external diameter of protrusion-dispelling ring should be equal to or less than the external diameter of the spacing end ring of self-expanding packer.In a preferred exemplary, in order to limit the axial deformation of packing element, the basic ring part of protrusion-dispelling ring extend in the spacing end ring of self-expanding packer at least in part.In an object lesson, spacing end ring comprises that the basic ring of protrusion-dispelling ring partly extend into holding portion wherein.This holding portion can be groove or step.
In one embodiment, the protrusion-dispelling ring is partly located to form as one through the self-expanding packing element of sulfuration with said self-expanding packer at basic ring.Therefore, in the expansion process of packing element, circular plate portion will closely be fitted on the packing element all the time, thereby has played the effect of protection packing element.
In one embodiment, said circular plate portion is the joint-cutting metal sheet.
Description of drawings
Illustrate in greater detail the utility model based on accompanying drawing below.Show some embodiment of the utility model though should be pointed out that accompanying drawing, yet the utility model is not limited to these embodiment.In the accompanying drawings,
Fig. 1 has shown the original state structure that is equipped with according to the self-expanding packer of the end protrusion-dispelling protective device of the utility model;
Fig. 2 has shown the state that sets of self-expanding packer shown in Figure 1;
Fig. 3 and 4 has shown end-view and the lateral view according to the protrusion-dispelling ring of the utility model respectively;
Fig. 5 has shown the zoomed-in view of area I among Fig. 1.
The specific embodiment
Fig. 1 has shown the self-expanding packer 10 that has according to the end protrusion-dispelling protective device of the utility model, and it comprises parent tube 1.Parent tube 1 for example can adopt the form of API sleeve pipe or oil pipe, and it is provided with screw thread at upper and lower end, so that be connected with the upper and lower part completion tubular column.
Be looped around this parent tube 1 and be provided with self-expanding packing element 6.This packing element 6 for example can vulcanize on parent tube 1 through the mode of twining perhaps mold pressing.The material of packing element 6 and length can customize according to concrete hole condition.When packer 10 is lowered into the precalculated position, shaft bottom along with the completion tubular string and touches liquid such as when crude oil or water, the packing element of being processed by rubber 6 will absorb oil or water, realize expanding.
This packer 10 also comprises spacing end ring 2, and it for example is fixed on the parent tube 1 through trip bolt 3, and is in close proximity to the two ends of packing element 6.Spacing end ring 2 can prevent the axial deformation that expansion produced of packing element 6.
Above structure is with being provided with that those skilled in the art knows, and therefore detailed be presented in this and omit.
According to the utility model, self-expanding packer 10 comprises end protrusion-dispelling protective device.In the present embodiment, protrusion-dispelling protective device in end comprises the protrusion-dispelling ring 5 on the two ends of two packing elements 6 that are looped around packer 10 respectively.This protrusion-dispelling ring for example can be made of metal.Shown in Fig. 3 and 4, protrusion-dispelling ring 5 comprises basic ring part 9.This basic ring part 9 is complete ring bodies.In addition, protrusion-dispelling ring 5 also comprises a plurality of circular plate portions 7 that from basic ring part 9, come out along the longitudinal extension of parent tube 1.As shown in Figure 3, these circular plate portions 7 are arranged to partly overlapping to each other in a circumferential direction.In a concrete embodiment, the overlapping area between the circular plate portion is area half the of circular plate portion.
In one embodiment; Sentence with the angled mode of tangential direction through the some circumferential positions on protrusion-dispelling ring 5 and not run through the joint-cutting of whole protrusion-dispelling ring longitudinal length to the other end, thereby formed above-mentioned a plurality of circular plate portion 7 from an end of protrusion-dispelling ring 5.Understand easily, protrusion-dispelling ring 5 do not formed basic ring part 9 by the end of joint-cutting.
According to the utility model, when packer 10 was lowered into the precalculated position, shaft bottom and touches liquid, packing element 6 will be because of absorbing oil or water expands.At this moment, owing to the qualification effect around the protrusion-dispelling ring 5 on the two ends that are installed in packing element 6, the speed of expansion at the two ends of packing element 6 will be less than the speed of expansion of intermediate portion.When packing element 6 had absorbed oil or the water of capacity, the two ends of packing element 6 also can strut the circular plate portion 7 of protrusion-dispelling ring, make it also produce expansion.Because each circular plate portion 7 of protrusion-dispelling ring all stretches out out from same basic ring part and all has free end; Therefore in expansion process; Circular plate portion 7 will closely be fitted on the packing element 6 all the time, thereby has played the effect of protection packing element, can prevent reliably that packing element from extruding, tearing.Therefore simultaneously,, between each circular plate portion 7, still be formed with flow channels, make that liquid can penetrate in the packing element 6 in the well from flow channels because each circular plate portion 7 upwards is being arranged to partly overlappingly to each other in week.Therefore, the two ends of packing element 6 still can absorption well after the envelope that expands in liquid, thereby kept degree of compaction, the annular space packing of realization reliable and stable to the borehole wall.Like this, can realize the permanent sealing of packing element, improve the sealability and the reliability of packer greatly.
As shown in Figure 4, in a preferred embodiment, each circular plate portion 7 not by adjacent slat part institute region covered on be provided with at least one flowing hole 8.These flowing holes 8 are as being formed at replenishing of flow channels between the circular plate portion 7, have further strengthened packing element two ends ability of liquid in the absorption well after the envelope that expands.On each circular plate portion 7, be provided with three flowing holes 8 although Fig. 4 has shown, yet understand easily, the quantity of flowing hole 8 and size all can be selected in requirement as the case may be.
In another embodiment, the external diameter of protrusion-dispelling ring 5 is equal to or slightly less than the external diameter of spacing end ring 2, so just can in being lowered to process, avoid packing element 6 and protrusion-dispelling ring 5 to be scratched by the borehole wall.
Advantageously, the basic ring part 9 of protrusion-dispelling ring 5 extend in the holding portion that is arranged in the spacing end ring 2 at least in part, so that limit the axial deformation that produces because of expansion at packing element two ends better.In embodiment as shown in Figure 5, this holding portion is the groove 12 that is provided with on the end face of spacing end ring 2, and the end of basic ring part 9 snaps onto in this groove 12.Understanding easily, this holding portion also can be the step parts that is provided with on the end face of spacing end ring 2.
Though the utility model is described hereinbefore, yet under the situation of the scope that does not break away from the utility model, can carries out various improvement and can replace parts wherein to it with equivalent with reference to some embodiment.Especially; Only otherwise have structural hazard; Various features among each embodiment that the utility model disclosed all can be through the any-mode use that mutually combines, and the description of situation of these combinations not being carried out exhaustive in this manual only is from omitting length and the consideration that economizes on resources.Therefore, the utility model is not limited to disclosed specific embodiment in the literary composition, but comprises all technical schemes in the scope that falls into claim.
Claims (8)
1. end protrusion-dispelling protective device that is used for the self-expanding packer comprises being used for respectively around the protrusion-dispelling ring on the two ends of the self-expanding packing element that is installed in said self-expanding packer,
It is characterized in that each said protrusion-dispelling ring comprises the basic ring part, and a plurality of circular plate portion that the longitudinal extension of the said self-expanding packer in edge comes out from said basic ring part, each said circular plate portion is upwards partly overlapping each other with adjacent circular plate portion in week.
2. end according to claim 1 protrusion-dispelling protective device is characterized in that, between adjacent two circular plate portions, has formed flow channels.
3. end according to claim 1 and 2 protrusion-dispelling protective device, each said circular plate portion not by adjacent slat part region covered on be provided with at least one flowing hole.
4. end according to claim 1 and 2 protrusion-dispelling protective device is characterized in that, the overlapping area between the adjacent slat part be half of area of each circular plate portion.
5. end according to claim 1 and 2 protrusion-dispelling protective device is characterized in that the external diameter of said protrusion-dispelling ring is less than or equal to the external diameter of the spacing end ring of said self-expanding packer.
6. end according to claim 5 protrusion-dispelling protective device is characterized in that, the basic ring part of said protrusion-dispelling ring extend in the spacing end ring of said self-expanding packer at least in part.
7. end according to claim 1 and 2 protrusion-dispelling protective device is characterized in that, said protrusion-dispelling ring is partly located to form as one through sulfuration and said self-expanding packing element at said basic ring.
8. end according to claim 1 and 2 protrusion-dispelling protective device is characterized in that said circular plate portion is the joint-cutting metal sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200308926U CN202451105U (en) | 2012-01-31 | 2012-01-31 | End part outburst-prevention protection device for self-expanding packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200308926U CN202451105U (en) | 2012-01-31 | 2012-01-31 | End part outburst-prevention protection device for self-expanding packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202451105U true CN202451105U (en) | 2012-09-26 |
Family
ID=46866975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200308926U Expired - Lifetime CN202451105U (en) | 2012-01-31 | 2012-01-31 | End part outburst-prevention protection device for self-expanding packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202451105U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569603A (en) * | 2014-10-14 | 2016-05-11 | 中国石油天然气股份有限公司 | High temperature well completion sealing device |
| NL1041829A (en) * | 2015-05-29 | 2016-12-07 | Halliburton Energy Services Inc | Packing element back-up system incorporating iris mechanism |
| CN106958432A (en) * | 2017-05-25 | 2017-07-18 | 隆学武 | Increase full bag enhancing set, processing method, cartridge and the packer of laminating degree |
| CN107269247A (en) * | 2017-06-15 | 2017-10-20 | 隆学武 | Half bag enhancing set, cartridge and packer |
-
2012
- 2012-01-31 CN CN2012200308926U patent/CN202451105U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569603A (en) * | 2014-10-14 | 2016-05-11 | 中国石油天然气股份有限公司 | High temperature well completion sealing device |
| NL1041829A (en) * | 2015-05-29 | 2016-12-07 | Halliburton Energy Services Inc | Packing element back-up system incorporating iris mechanism |
| CN106958432A (en) * | 2017-05-25 | 2017-07-18 | 隆学武 | Increase full bag enhancing set, processing method, cartridge and the packer of laminating degree |
| CN107269247A (en) * | 2017-06-15 | 2017-10-20 | 隆学武 | Half bag enhancing set, cartridge and packer |
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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 |
Granted publication date: 20120926 |
|
| CX01 | Expiry of patent term |