CN202176305U - Self-expandable packer with protrusion-resisting protective device - Google Patents
Self-expandable packer with protrusion-resisting protective device Download PDFInfo
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- CN202176305U CN202176305U CN 201120133008 CN201120133008U CN202176305U CN 202176305 U CN202176305 U CN 202176305U CN 201120133008 CN201120133008 CN 201120133008 CN 201120133008 U CN201120133008 U CN 201120133008U CN 202176305 U CN202176305 U CN 202176305U
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Abstract
The utility model provides a self-expandable packer with a protrusion-resisting protective device. The self-expandable packer comprises a base pipe 1, a self-expandable rubber cylinder 6 and limit protrusion-resisting mechanisms. The self-expandable rubber cylinder 6 is sheathed outside the base pipe 1 and the two ends of the self-expandable rubber cylinder 6 are respectively sheathed with the limit protrusion-resisting mechanisms which are arranged oppositely; each limit protrusion-resisting mechanism comprises a limit end ring 2, a protrusion-resisting ring 5, a fastening screw 3 and a sealing ring 4; the limit end ring 2 is sheathed outside the base pipe 1 and fixed by the fastening screw 3 and sealing is realized by the sealing ring 4; the protrusion-resisting ring 5 is sheathed outside the base pipe 1 and arranged between the limit end ring 2 and the self-expandable rubber cylinder 6; and the protrusion-resisting ring 5 is of a structure of a pre-punching hole bowl, wherein the large-diameter section bowl wall wraps the tail end of the self-expandable rubber cylinder 6 and the inner surface of the large-diameter section bowl wall is vulcanized together with the tail end of the self-expandable rubber cylinder 6, while the outer surface of a small-diameter section bowl wall is pressed by one end of the limit end ring 2, and the outer wall of the other end of the limit end ring 2 is provided with a tapered step structure. The self-expandable packer can be applied various well completion ways and is simple in structure and convenient to manufacture and use.
Description
Technical field
The utility model belongs to oil drilling, completion practice technical field, is specifically related to a kind of self-expanding packer that has the protrusion-dispelling protective device.
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.At present, the packer that is used for zone isolation mainly contains three types of mechanical compression type, hydraulic expansion formula and self-expanding formulas.Though the mechanical compression type packer can be realized bigger packing pressure reduction in short seal length, expansion rate is lower, and well rule degree is had relatively high expectations, and outside dimension is bigger, and there is the risk that is hampered in the process that is lowered to.Hydraulic expansion formula packer inflation rate is big, but the instrument that need be lowered to sets, complicated operation, and the life-span is short, and sealability is low.The self-expanding packer has following advantage with respect to preceding two kinds of packers: 1) do not have mechanical moving component, do not need special setting tool, be applicable to the completion practice of complex hydrocarbon well; 2) simplified the completion construction technology, improved completion practice efficient, reduced cost; 3) adaptive capacity to different well ' s conditions is strong; 4) be fit to irregular borehole, and rubber possesses self-repair function; 5) the rubber swelling process is irreversible, sealing performance is reliable, the life-span is long.
The patent No. is that 200920106033.9 patent discloses a kind of self-expanding formula packer; The self-expanding packer that this utility model is introduced; Though belong to self-expanding packer classification; Utilize the oil suction water absorption character of oil and water contact expansible rubber to realize the bloated envelope of packing element, realize the axial limiting of packing element through jump ring.This limit method expands at packing element and is honored as a queen, and the packing element external diameter goes out greatly much than the baffle ring external diameter, can't play support rubber, prevent the effect that rubber is extruded.In addition, utilize the fixedly mode of baffle ring of jump ring, complex structure, and be not easy to install, weakened the intensity of parent tube.Whole packer bearing capacity is limited.
The patent No. be 200920278348.1 patent the packer retainer ring is disclosed and have this retainer ring chance oil, meet water self-expanding packer; Self-expanding packer that this utility model is introduced and fixed limit ring; The mode that is employed in a plurality of spacing rings of fixed interval on the packing element prevents the packing element bulge, simultaneously the fixed part length vertically of retainer ring is equaled the length of packer end.But should still 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.The multistage retainer ring has also reduced the seal length and the sealing performance thereof of packing element.
The patent No. is that 200920248921.4 patent discloses a kind of automatic expansion type external packer of pipe, can realize meeting behind the well oil and meet water and expand automatically.Related self-expanding packing element has two kinds of form of structure: spacing shell type and infinite place shell type are arranged.Two kinds of structures all do not take into full account the expansion after the oil suction suction of packing element two ends, because the axial restraint of stop collar, cause occurring in the packing element expansion process bulge easily and occur with the parent tube break-off.In addition, this utility model does not consider that the rubber that packing element expands in the envelope process extrudes problem, and this can influence the bearing capacity of packer.
The patent No. is that the patent of US 7806193 discloses a kind of Swellable packer with back-upsystems, and this patent relates to the chance oil swell packers that has the thermoplastic end retainer equally, and when going into well, this end retainer can be protected packing element; After expansion, for meeting oily expansion Flexible element certain mechanical support is provided, axially extrude to limit it, improve sealability.This is simple in structure, but after setting, end ring can not touch the borehole wall, and rubber still has and extrudes, the possibility of stuff up a crack, and then influences sealability.
The patent No. is that US 7422071 discloses a kind of Swelling packer with overlapping petals, and what this patent related to is packer, but does not talk about the protrusion-dispelling device at packer two ends.
In sum, the oily water self-expanding packer of meeting of existing how tame mechanism end-on is both at home and abroad studied, and still has following problem and shortage but meet oil chance water self-expanding packer construction at present:
1) in order to realize bigger packing ability, packing element length is long, is not easy to be lowered to, and has restricted its application in oil sheet or big dog-leg degree well.
2) rubber with well in liquid (crude oil or water) contact the back prolonged expansion, inevitably the situation that rubber is extruded even torn can appear, reduce sealability and reliability.
The utility model content
The purpose of the utility model is to solve a difficult problem that exists in the above-mentioned prior art; A kind of self-expanding packer that has the protrusion-dispelling protective device is provided; Solve the existing oil of meeting and meet water self-expanding packer problems such as the packing element two ends are prone to extrude, tear in bloated envelope process, protection packing element when realizing well is in the sealability that expands and be honored as a queen and support packing element and then guarantee packing element; Simultaneously flow channels can be provided; Guarantee that packing element continues the absorption well inner fluid from two ends, protection rubber is not extruded under the situation of fully imbibition, is not torn, not bulge, improves the reliability and the bearing capacity of packer.
The utility model is realized through following technical scheme:
A kind of self-expanding packer that has the protrusion-dispelling protective device comprises parent tube 1, self-expanding packing element 6 and spacing protrusion-dispelling mechanism;
Said self-expanding packing element 6 is enclosed within outside the parent tube 1 and is fixed on its outer wall;
On said parent tube 1, be respectively installed with a spacing protrusion-dispelling mechanism in self-expanding packing element 6 two ends, two spacing protrusion-dispelling mechanisms are oppositely arranged;
Each said spacing protrusion-dispelling mechanism comprises spacing end ring 2, protrusion-dispelling ring 5, holding screw 3 and sealing ring 4;
Said spacing end ring 2 is enclosed within outside the parent tube 1, and is fixed on the outer wall of parent tube 1 through holding screw 3, between spacing end ring 2 inner surfaces and parent tube 1, sealing ring 4 is housed;
Said protrusion-dispelling ring 5 is enclosed within outside the parent tube 1, and is installed between spacing end ring 2 and the self-expanding packing element 6;
Said protrusion-dispelling ring 5 is a bowl structure, on its big footpath section bowl wall, has the inside and outside punching that connects, and big footpath section bowl wall wraps the end of self-expanding packing element 6, and the inner surface of big footpath section bowl wall and the distal outer surface of self-expanding packing element 6 sulfide; One end of the limited end ring 2 of path section bowl wall external surface is pushed down, and the other end outer wall of spacing end ring 2 is provided with conical ledge structure.
Self-expanding packing element 6 is through oil and water contact expansible rubber being twined or the mode of squeeze note bonds and is wrapped on the parent tube 1, then through sulfidization molding.
The maximum outside diameter of the external diameter of spacing end ring 2 and self-expanding packing element 6 is identical or greater than the maximum outside diameter of self-expanding packing element 6.
Said parent tube 1 adopts API sleeve pipe or oil pipe; All be processed with external screw thread with the lower end in the top.
Compared with prior art, the beneficial effect of the utility model is:
(1) through sulfuration has the protrusion-dispelling ring at self-expanding packing element two ends; Make it and packing element distending together; Play and support the self-expanding packing element, prevent that rubber from extruding, the effect of stuff up a crack, guaranteed the sealing effectiveness of self-expanding packing element, can guarantee liquid continuous infiltration packing element in the well simultaneously; The protrusion-dispelling ring is arranged on the two ends of self-expanding packing element, when packer is gone into well, packing element is played a protective role, and avoids packing element by scratch; The setting of protrusion-dispelling ring has promoted the reliability of self-expanding packer greatly, has avoided packer in going into the well process, to be damaged, and is convenient to into well more.In addition, the protrusion-dispelling ring is provided with a plurality of holes, solved because the protrusion-dispelling ring with the self-expanding packing element expand the back fluid partitioning, cause the problem of imbibition difficulty;
(2) end ring at two ends is used for fixing and supports protrusion-dispelling ring and packing element, has promoted the sealability and the reliability of packer greatly, and makes the packer compact overall structure, is convenient to more into well;
(3), solved in the prior art because the problem of the interior liquid infiltration of the well that the fit clearance of end ring and parent tube produces packing element has avoided absorbing because of the self-expanding packing element generation of the even phenomenon of the inhomogeneous non-homogeneous expansion that causes of liquid through on end ring, adding sealing ring.
Description of drawings
Fig. 1 is the initial shape body structure figure of the utility model self-expanding packer of having the protrusion-dispelling protective device.
Fig. 2 be the utility model have a protrusion-dispelling protective device the self-expanding packer at the structure chart that expands and be honored as a queen.
Fig. 3 (a) is that the utility model has the protrusion-dispelling ring original state plan structure figure on the self-expanding packer of protrusion-dispelling protective device.
Fig. 3 (b) is that the utility model has the protrusion-dispelling ring original state side-looking structure chart on the self-expanding packer of protrusion-dispelling protective device.
Wherein, 1 is parent tube, and 2 is spacing end ring, and 3 is holding screw, and 4 is sealing ring, and 5 is the protrusion-dispelling ring, and 6 are the self-expanding packing element.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail:
As shown in Figure 1, a kind of self-expanding packer that has the protrusion-dispelling protective device comprises parent tube 1, self-expanding packing element 6 and spacing protrusion-dispelling mechanism.
Wherein, parent tube 1 is used to connect the upper and lower part completion tubular column, and parent tube 1 adopts API sleeve pipe or oil pipe on request behind the intercepting certain-length, goes up external screw thread with lower end processing in the top and processes;
The squeeze note mode bonds sulfuration on parent tube to self-expanding packing element 6 through twining perhaps; The material of self-expanding packing element 6 and length can customize according to hole condition;
Upper and lower side at self-expanding packing element 6 is separately installed with the spacing protrusion-dispelling of cover mechanism; The spacing protrusion-dispelling of every cover comprises spacing end ring 2, protrusion-dispelling ring 5, holding screw 3 and sealing ring 4; Spacing end ring 2 is fixed on the parent tube 1 at self-expanding packing element 6 two ends through holding screw 3; Spacing end ring 2 one end outer walls are provided with conical ledge structure, are convenient to packer and go into well, and an end compresses protrusion-dispelling ring 5.Sealing ring 4 is installed in its inboard in order to seal the gap between spacing end ring 2 and the parent tube 1; Prevent to infiltrate the slit of liquid between end ring 2 and parent tube 1 in the well phenomenon appearance of avoiding bulge that 6 inner surface oil suctions of self-expanding packing element or suction produced, breaking away from parent tube 1;
Between spacing end ring 2 and self-expanding packing element 6, be separately installed with 5, two protrusion-dispelling ring 5 positioned opposite of a protrusion-dispelling ring.Said protrusion-dispelling ring 5 is enclosed within outside the parent tube 1; Adopt the bowl structure of pre-punched hole; On its big footpath section bowl wall, have the inside and outside punching that connects, big footpath section bowl wall wraps the end of self-expanding packing element 6, and the inner surface of big footpath section bowl wall and the distal outer surface of self-expanding packing element 6 sulfide; One end of the limited end ring 2 of path section bowl wall external surface is pushed down, and prevents the axial deformation that self-expanding packing element 6 expands and produces.The maximum outside diameter of the external diameter of spacing end ring 2 and self-expanding packing element 6 is identical or be slightly larger than the external diameter of packing element 6, guarantees that in being lowered to process self-expanding packing element 6 is not scratched by the borehole wall.
As shown in Figure 2, behind the self-expanding packer G.I.H appropriate location that has the protrusion-dispelling protective device, when crude oil in the contact well or water layer, self-expanding packing element 6 will absorb oil or water is realized expanding.In expansion process, need not to be lowered to other instrument.Because sealing ring 4 seals up the gap between spacing end ring 2 and the parent tube 1; Self-expanding packing element 6 two ends are by protrusion-dispelling ring 5 parcels, and therefore, rubber can only absorb liquid through self-expanding packing element external surface; Mid portion expands earlier; In the middle of the speed of expansion at self-expanding packing element 6 two ends is slightly less than, produce enough stress, will continue to expand by distending protrusion-dispelling ring 5 when self-expanding packing element 6 expands; Protrusion-dispelling ring 5 fits tightly self-expanding packing element 6 all the time in expansion process, protrusion-dispelling ring 5 has played the effect that prevents that two ends rubber is extruded, tears like this.
Shown in Fig. 3 (a), Fig. 3 (b); Protrusion-dispelling ring 5 adopts bowl structure, is reserved with a plurality of punchings on its surface, though protrusion-dispelling ring 5 in the envelope that expands with self-expanding packing element 6 with after the borehole wall contacts; Can guarantee that still liquid infiltrates in the self-expanding packing element 6 smoothly in the well; Self-expanding rubber can continue the absorption well inner fluid like this, keeps the degree of compaction to the borehole wall, realizes the annular space packing of reliable and stable.The actual proof of using, bowl-shape protrusion-dispelling ring structure is reasonable, is easy to distending, and the edge of being honored as a queen of expanding is moderate with borehole wall gap, and punching size, reasonable quantity can prevent effectively that the self-expanding packing element from extruding the bearing capacity of lifting packer.
The utility model is through being provided with spacing protrusion-dispelling mechanism at self-expanding packing element 6 two ends; Play the effect of protection and support self-expanding packing element; Improved the well process safe property of going into of self-expanding packer and sealed the reliability of operation with expanding, and solved the liquid infiltration problem behind the self-expanding packing element and the protrusion-dispelling loop contacts borehole wall, it is inner to have guaranteed that sufficient liquid gets into self-expanding rubber; So that realize the permanent sealing of self-expanding packing element; Improved the sealability and the reliability of packer greatly, and made the packer compact overall structure, be convenient to into well more.
This utility model belongs to field of oil drilling, can satisfy separate zone production, stimulation work, and completion practice requirements such as sand control water blockoff improve the reliability that packer expands and is honored as a queen, and increase the sealability of packer.The barefoot completion that is used for low permeability reservoirs, and the high temperature raising the output transformation under the bad hole condition such as shake out, success rate is high, has broad application prospects.
Technique scheme is a kind of embodiment of the utility model; For those skilled in the art; On the basis that the utility model discloses application process and principle, be easy to make various types of improvement or distortion, and be not limited only to the described method of the above-mentioned specific embodiment of the utility model; Therefore the mode of front description is just preferred, and does not have restrictive meaning.
Claims (4)
1. self-expanding packer that has the protrusion-dispelling protective device is characterized in that: said self-expanding packer comprises parent tube (1), self-expanding packing element (6) and spacing protrusion-dispelling mechanism;
Said self-expanding packing element (6) is enclosed within outside the parent tube (1) and is fixed on its outer wall;
On said parent tube (1), be respectively installed with a spacing protrusion-dispelling mechanism in self-expanding packing element (6) two ends, two spacing protrusion-dispelling mechanisms are oppositely arranged;
Each said spacing protrusion-dispelling mechanism comprises spacing end ring (2), protrusion-dispelling ring (5), holding screw (3) and sealing ring (4);
Said spacing end ring (2) is enclosed within outside the parent tube (1), and is fixed on the outer wall of parent tube (1) through holding screw (3), between spacing end ring (2) inner surface and parent tube (1), sealing ring (4) is housed;
Said protrusion-dispelling ring (5) is enclosed within outside the parent tube (1), and is installed between spacing end ring (2) and the self-expanding packing element (6);
Said protrusion-dispelling ring (5) is a bowl structure, on its big footpath section bowl wall, has the inside and outside punching that connects, and big footpath section bowl wall wraps the end of self-expanding packing element (6), and the inner surface of big footpath section bowl wall and the distal outer surface of self-expanding packing element (6) sulfide; One end of the path section bowl limited end ring of wall external surface (2) is pushed down, and the other end outer wall of spacing end ring (2) is provided with conical ledge structure.
2. the self-expanding packer that has the protrusion-dispelling protective device according to claim 1; It is characterized in that: said self-expanding packing element (6) is through oil and water contact expansible rubber being twined or the mode of squeeze note bonds and is wrapped on the parent tube (1), then through sulfidization molding.
3. the self-expanding packer that has the protrusion-dispelling protective device according to claim 1 is characterized in that: the maximum outside diameter of the external diameter of said spacing end ring (2) and self-expanding packing element (6) is identical or greater than the maximum outside diameter of self-expanding packing element (6).
4. the self-expanding packer that has the protrusion-dispelling protective device according to claim 1 is characterized in that: said parent tube (1) adopts API sleeve pipe or oil pipe; All be processed with external screw thread with the lower end in the top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120133008 CN202176305U (en) | 2011-04-29 | 2011-04-29 | Self-expandable packer with protrusion-resisting protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120133008 CN202176305U (en) | 2011-04-29 | 2011-04-29 | Self-expandable packer with protrusion-resisting protective device |
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| Publication Number | Publication Date |
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| CN202176305U true CN202176305U (en) | 2012-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201120133008 Expired - Lifetime CN202176305U (en) | 2011-04-29 | 2011-04-29 | Self-expandable packer with protrusion-resisting protective device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541681A (en) * | 2013-10-28 | 2014-01-29 | 四机赛瓦石油钻采设备有限公司 | High-temperature-resistant high-pressure-resistant cross-class compression type seal component for bushes and barefoot wells |
| CN104213866A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气集团公司 | Self-expansion packer improving sealing ability and self-expansion method improving sealing ability |
| CN107989568A (en) * | 2017-11-27 | 2018-05-04 | 李明 | A kind of multistage can desealed water-swelling packer and method |
| CN110735612A (en) * | 2019-11-08 | 2020-01-31 | 西南石油大学 | double-acting ultrahigh-pressure clamping and sealing rubber cylinder |
| CN112443290A (en) * | 2019-08-28 | 2021-03-05 | 中国石油化工股份有限公司 | Anchoring packing cement surface control device and well cementation tubular column comprising same |
| CN116446820A (en) * | 2023-04-27 | 2023-07-18 | 盐城市弘通石油机械有限公司 | Tail pipe top packer |
| CN117166957A (en) * | 2023-11-03 | 2023-12-05 | 中国石油集团渤海钻探工程有限公司 | Sand-proof plugging tool with delayed expansion sealing and use method thereof |
-
2011
- 2011-04-29 CN CN 201120133008 patent/CN202176305U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213866A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气集团公司 | Self-expansion packer improving sealing ability and self-expansion method improving sealing ability |
| CN103541681A (en) * | 2013-10-28 | 2014-01-29 | 四机赛瓦石油钻采设备有限公司 | High-temperature-resistant high-pressure-resistant cross-class compression type seal component for bushes and barefoot wells |
| CN107989568A (en) * | 2017-11-27 | 2018-05-04 | 李明 | A kind of multistage can desealed water-swelling packer and method |
| CN107989568B (en) * | 2017-11-27 | 2019-11-22 | 东阳市天杨建筑工程设计有限公司 | A kind of multistage can desealed water-swelling packer and method |
| CN112443290A (en) * | 2019-08-28 | 2021-03-05 | 中国石油化工股份有限公司 | Anchoring packing cement surface control device and well cementation tubular column comprising same |
| CN110735612A (en) * | 2019-11-08 | 2020-01-31 | 西南石油大学 | double-acting ultrahigh-pressure clamping and sealing rubber cylinder |
| CN116446820A (en) * | 2023-04-27 | 2023-07-18 | 盐城市弘通石油机械有限公司 | Tail pipe top packer |
| CN116446820B (en) * | 2023-04-27 | 2023-10-31 | 盐城市弘通石油机械有限公司 | Tail pipe top packer |
| CN117166957A (en) * | 2023-11-03 | 2023-12-05 | 中国石油集团渤海钻探工程有限公司 | Sand-proof plugging tool with delayed expansion sealing and use method thereof |
| CN117166957B (en) * | 2023-11-03 | 2024-01-05 | 中国石油集团渤海钻探工程有限公司 | Sand-proof plugging tool with delayed expansion sealing and use method thereof |
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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: 20120328 |
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| CX01 | Expiry of patent term |