CN210317184U - Sleeve structure device - Google Patents
Sleeve structure device Download PDFInfo
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- CN210317184U CN210317184U CN201920213172.5U CN201920213172U CN210317184U CN 210317184 U CN210317184 U CN 210317184U CN 201920213172 U CN201920213172 U CN 201920213172U CN 210317184 U CN210317184 U CN 210317184U
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- sleeve
- pipe
- wall
- elastic layer
- tube
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Abstract
The utility model discloses a sleeve pipe structure device, sleeve pipe structure device includes: the pipe comprises a sleeve, an outer pipe, an inner pipe and an elastic layer. The outer pipe is sleeved with the sleeve, the inner wall of the inner pipe is abutted to the outer wall of the sleeve, and the inner pipe seals two ends of the outer pipe; the elastic layer is filled in the space formed by the inner tube, the outer tube and the sleeve, and the elastic body can be adhered to the outer wall of the sleeve. The utility model discloses a mode of packing the elastic layer after the suit earlier seals, can not destroy inside sheathed tube structure and sealed integrality to solved the big problem of the past technical suit degree of difficulty, the selection range of outer tube size has also obtained the increase simultaneously, can improve the lower casing degree of difficulty. Because the elastic layer is arranged between the casing and the outer pipe, the casing expands to generate radial deformation in the fracturing or gas injection process, the stress of the internal pressure action of the casing on an interface of the cement sheath is reduced to some extent under the action of the elastic layer and the outer pipe, and the probability of generating micro annular gaps and tensile damage due to plastic deformation generated on the inner wall of the cement sheath is reduced.
Description
Technical Field
The utility model belongs to the technical field of well cementation gas channeling prevention instrument technique and specifically relates to a sleeve structure device is related to.
Background
In the process of oil and gas well development, the problem of annulus pressure of a gas well is prominent, for example, in the shale gas fracturing construction process, because the number of fracturing modification sections is large, the modification scale is large, and a shaft at the middle upper part of a production zone section can continuously and repeatedly experience periodic changes of the pressure in the shaft. Higher in-service pressures can cause inconsistent deformation of the casing-cement annulus system, thereby inducing annular micro-annuli. The formation of the micro-annular space provides a channeling channel for formation fluid, so that annular space between sleeves is easily pressurized; the flow of formation fluids and fracturing fluids along the microrings may also cause fault slippage during the fracturing process, thereby causing shear damage to the casing, causing great damage to the integrity of the well bore of the oil and gas well, and seriously affecting the normal production of the oil and gas well.
Therefore, how to reduce the influence of high wellbore internal pressure in the fracturing or gas injection process on the sealing performance of the cement sheath interface is a technical problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a casing structure device can reduce the higher pressure in the pit shaft of fracturing or gas injection in-process and to the influence of cement sheath interface leakproofness.
In order to achieve the above object, the present invention provides the following solutions:
a sleeve structure apparatus comprising:
a sleeve;
the outer pipe is sleeved outside the sleeve, the inner wall of the inner pipe is abutted against the outer wall of the sleeve, and the inner pipe seals two ends of the outer pipe;
the elastic layer is filled in a space formed by the inner pipe, the outer pipe and the sleeve, and the elastic body can be used for sticking the sleeve, the outer pipe and the inner pipe.
In a particular embodiment, the resilient layer is formed of a cast, settable resin.
In another specific embodiment, an inner step is provided on the inner wall of the outer tube;
the inner step is abutted against the outer wall of the sleeve, and the elastic layer is arranged in a space surrounded by the inner step, the sleeve and the top end of the outer tube.
In another specific embodiment, the cannula instrument further comprises a packing rubber;
the sealing rubber cylinder is filled in a space defined by the inner step, the sleeve and the bottom end of the outer pipe.
In another specific embodiment, the packing sleeve is made of nitrile rubber.
In another specific embodiment, the inner pipe and the outer pipe are connected through threads, and the end part of the inner pipe is provided with a limiting ring capable of abutting against the end part of the outer pipe.
In another specific embodiment, the inner tube and the outer tube are both steel tubes.
In another specific embodiment, the outer wall of the sleeve where surrounded by the outer tube is provided with a first rough surface layer.
In another specific embodiment, the inner wall of the outer tube is provided with a second rough facing.
In another specific embodiment, the outer wall of the outer tube is provided with a third rough surface layer.
According to the utility model discloses an each embodiment can make up as required wantonly, and the embodiment that obtains after these combinations is also in the utility model discloses the scope is the utility model discloses a part of the concrete implementation mode.
In a specific embodiment of the utility model, the utility model discloses a sleeve pipe structure device, because the sleeve pipe overcoat is equipped with the outer tube, through inner tube sealing connection between outer tube and the sleeve pipe, and the elastic layer is filled in the space that outer tube, inner tube and sleeve pipe are constituteed, realizes that outer tube, inner tube and sheathed tube are connected through the elastic layer. The utility model provides a sleeve pipe structure device seals through the elastic layer between outer tube and the sleeve pipe, has effectively solved the not enough shortcoming of long-term sealing ability between sleeve pipe and the outer tube, and then has guaranteed the sealing ability at gas well cement sheath interface. The utility model discloses a mode of packing the elastic layer after the suit earlier seals, can not destroy inside sheathed tube structure and sealed integrality to solved the big problem of the past technical suit degree of difficulty, the selection range of outer tube size has also obtained the increase simultaneously, can improve the lower casing degree of difficulty. Because the elastic layer is arranged between the casing and the outer pipe, the casing expands to generate radial deformation in the fracturing or gas injection process, the stress of the internal pressure action of the casing on an interface of the cement sheath is reduced to some extent under the action of the elastic layer and the outer pipe, and the probability of generating micro annular gaps and tensile damage due to plastic deformation generated on the inner wall of the cement sheath is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without any novelty.
Fig. 1 is a transverse cross-sectional view of a sleeve structure device provided by the present invention;
fig. 2 is a longitudinal sectional view of the casing structure device provided by the present invention.
Wherein, in fig. 1-2:
the pipe comprises a casing 1, an outer pipe 2, an inner pipe 3, an elastic layer 4, an inner step 201, a sealing rubber cylinder 5 and a cement sheath 6.
Detailed Description
The utility model discloses an improve sleeve pipe structure device of cement sheath leakproofness, it can prevent fracturing and gas injection in-process, and the production of cement sheath micro-annular gap is avoided to the damage of cement sheath mechanics integrality to sleeve pipe inflation deformation. This scheme adopts solidifiable resin material to seal, can not destroy the intraductal sealed integrality of cover.
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
Example one
As shown in fig. 1-2, the present invention provides a casing structure device. The sleeve structure device comprises a sleeve 1, an outer tube 2, an inner tube 3 and an elastic layer 4.
The sleeve pipe 1 is sleeved outside the outer pipe 2, the inner wall of the inner pipe 3 is abutted to the outer wall of the sleeve pipe 1, and the inner pipe 3 seals two ends of the outer pipe 2 to form a complete sealing structure.
The elastic layer 4 is filled in the space formed by the inner tube 3, the outer tube 2 and the sleeve 1, and the elastic layer 4 can be adhered to the outer wall of the sleeve 1. The elastic layer 4 is filled in a space formed by the inner pipe 3, the outer pipe 2 and the sleeve 1 in a pouring mode.
The elastic layer 4 may be made of any material having elastic deformability and certain viscosity.
The utility model discloses a sleeve pipe structure device, because the 1 overcoat of sleeve pipe is equipped with outer tube 2, it is sealed through inner tube 3 between outer tube 2 and the sleeve pipe 1, and elastic layer 4 packs in the space that outer tube 2, inner tube 3 and sleeve pipe 1 are constituteed, glues sleeve pipe 1 through elastic layer 4 and realizes being connected of outer tube 2, inner tube 3 and sleeve pipe 1. The utility model provides a sleeve pipe structure device seals through elastic layer 4 between outer tube 2 and the sleeve pipe 1, has effectively solved the not enough shortcoming of long-term sealing ability between sleeve pipe 1 and the outer tube 2, and then has guaranteed the sealing ability at 6 interfaces of gas well cement sheath. The utility model discloses a mode of packing elastic layer 4 after the suit earlier seals, can not destroy inside sleeve pipe 1's structure and sealed integrality to solved the big problem of the past technical suit degree of difficulty, the selection scope of 2 sizes of outer tube has also obtained the increase simultaneously, can improve the lower casing pipe 1 degree of difficulty. Because the elastic layer 4 is arranged between the casing 1 and the outer pipe 2, the casing 1 expands to generate radial deformation in the fracturing or gas injection process, the stress of the internal pressure action of the casing 1 on the interface of the cement sheath 6 is reduced to some extent under the action of the elastic layer 4 and the outer pipe 2, and the probability of generating micro annular gaps and tensile failure due to plastic deformation generated on the inner wall of the cement sheath 6 is reduced.
Example two
The utility model provides a second embodiment, the structure of the sleeve pipe structure device in this embodiment is similar with the sleeve pipe structure device in embodiment one, just no longer has been repeated to the same place, only introduces the difference.
In the present embodiment, the present invention specifically discloses that the elastic layer 4 is formed of a poured curable resin. And a solidifiable resin material is injected between the sleeve 1 and the outer tube 2, and the solidified material is bonded with the outer wall of the sleeve 1 and the inner wall of the outer tube 2.
Specifically, the utility model discloses a resin is epoxy, and resin also can be for resin material to form for epoxy and aromatic amine curing agent are compounded, has high temperature resistant, compressive strength is high, long service life's characteristics. Certainly, the resin can also be one or more of epoxy resin, organic silicon resin and phenolic resin with better bonding performance to ensure that the outer pipe 2 and the inner pipe 3 have good sealing performance after solidification, and secondly, the resin material formed after solidification has better elastic performance to meet the requirement that the inner wall of the cement ring 6 is in an elastic change range in the process of changing the internal periodic load of the sleeve 1.
In this example, after the resin material is solidified, the resin material is bonded with the outer wall of the casing 1 and the inner wall of the outer tube 2 in a cementing manner, so that the sealing performance inside the casing structure device is enhanced.
Further, the utility model discloses a be provided with interior step 201 on the inner wall of outer tube 2, interior step 201 and sleeve pipe 1's outer wall butt, elastic layer 4 sets up between the top of interior step 201, sleeve pipe 1 and outer tube 2. Specifically, the inner step 201 may be a ring with a regular shape, or may be other irregular shapes, and the two structures that can divide the space formed between the outer tube 2 and the sleeve 1 into the upper and lower parts all belong to the protection scope of the present invention.
Further, the utility model discloses a sleeve pipe structure device still includes sealed packing element 5, and sealed packing element 5 is filled between the bottom of interior step 201, sleeve pipe 1 and outer tube 2. The sealing rubber cylinder 5 plays a role in sealing when the outer layer rigid sleeve and the inner layer sleeve 1 are filled with the solidifiable resin material in the annular space, and plays a role in secondary sealing in the later construction process. The sealing rubber tube 5 is used at the end part of the outer tube with the inner step 201, so that the construction difficulty in the sleeving process is reduced.
The outer tube 2 with the inner step 201 is connected with the inner tube 3 and the sealing rubber cylinder 5 on the side, then the solidifiable resin material is injected, after the resin material is solidified, the inner tube 3 at the top end of the outer tube 2 is screwed in, and the resin material is extruded to compress and seal the sleeve structure device. Because the utility model discloses a be solidifiable resin material, its practical life is long, and can not destroy sleeve pipe 1's sealed and structural integrity.
Use this when using neotype, carry out the operation with its suit in the sleeve pipe 1 outside, cement setting back, cement sheath 6 is located between outer tube 2 and the wall of a well, and it is required to explain that outer tube 2 forms first cemented surface with cement sheath 6, and cement sheath 6 is the cemented surface of second with the wall of a well.
Further, the utility model discloses a packing element that packing element 5 made for butadiene acrylonitrile rubber sets up between the medial surface of the interior step 201 of outer tube 2 and inner tube 3, and packing element 5's the outside contacts with outer tube 2 and sleeve pipe 1, carries out the primary seal to the sleeve pipe structure device. It should be noted that the sealant cylinder 5 may be made of other materials.
Further, the utility model discloses an inner tube 3 passes through threaded connection with outer tube 2, and the tip of inner tube 3 is provided with the spacing ring that can with the tip butt of outer tube 2. The spacing ring can be dismantled with the tip of outer tube 2 and be connected, also can be integrated into one piece, in order to improve the whole leakproofness of bushing structure device, preferred spacing ring and outer tube 2 integrated into one piece. The relative position of outer tube 2 and inner tube 3 can be restricted to the spacing ring on the one hand, and the threaded connection of inner tube 3 and outer tube 2 is realized to the handheld spacing ring of being convenient for on the other hand.
In order to be convenient for further hand-hold the inner tube 3 and install the outer tube 2 department, the utility model discloses a be provided with the recess or the decorative pattern layer of being convenient for hand-hold on the spacing ring.
Further, the utility model discloses an inner tube 3 is the steel pipe with outer tube 2. It should be noted that the inner tube 3 and the outer tube 2 may be made of other metal materials.
Further, the utility model discloses a department that the outer wall of sleeve pipe 1 is surrounded by outer tube 2 is provided with first coarse surface course, is convenient for improve the resin material after solidifying and sleeve pipe 1's cementation intensity.
In order to improve the cementation strength of the solidified resin material and the outer tube 2, the utility model discloses an inner wall of the outer tube 2 is provided with the rough surface course of second.
In order to improve the cementation strength of the solidified resin material and the cement sheath 6, the utility model discloses an outer wall of the outer tube 2 is provided with a third rough surface layer.
The first rough surface layer, the second rough surface layer and the third rough surface layer include, but are not limited to, a pattern layer, a scratch layer, a pit layer, etc.
Because the resin material is arranged between the casing 1 and the outer pipe 2, the deformation of the resin material absorbs the effect of the internal pressure of the casing 1 in the fracturing process, so that the stress of the outer pipe 2 acting on the inner wall of the cement sheath 6 is reduced, the problem of cementing failure of the interface of the cement sheath 6 caused by plastic deformation of the inner wall of the cement sheath 6 is avoided, and the occurrence of gas well annular gas channeling is effectively avoided.
It should be noted that the terms indicating the orientation, such as the top end and the bottom end, are set in the direction of the drawings in the specification, and are used for convenience of description only and have no other specific meanings.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. A sleeve construction apparatus, comprising:
a sleeve (1);
the outer pipe (2) is sleeved outside the sleeve (1), the inner wall of the inner pipe (3) is abutted to the outer wall of the sleeve (1), and the inner pipe (3) seals two ends of the outer pipe (2); and
the elastic layer (4) is filled in the space formed by the inner pipe (3), the outer pipe (2) and the sleeve (1), and the elastic layer (4) can be adhered to the sleeve (1), the outer pipe (2) and the inner pipe (3).
2. A jacket structure arrangement according to claim 1, characterized in that the elastic layer (4) is formed of a poured settable resin.
3. A jacket structure arrangement according to claim 1, characterized in that the outer pipe (2) is provided with an inner step (201) on its inner wall;
the inner step (201) is abutted to the outer wall of the sleeve (1), and the elastic layer (4) is arranged in a space surrounded by the inner step (201), the sleeve (1) and the top end of the outer tube (2).
4. A sleeve construction arrangement according to claim 3, further comprising a packing rubber cartridge (5);
the sealing rubber cylinder (5) is filled in a space defined by the bottom ends of the inner step (201), the sleeve (1) and the outer pipe (2).
5. A casing structure arrangement according to claim 4, characterised in that the packing unit (5) is a rubber unit made of nitrile rubber.
6. A sleeve arrangement according to claim 1, characterized in that the inner tube (3) is in threaded connection with the outer tube (2), and that the end of the inner tube (3) is provided with a stop collar that can be brought into abutment with the end of the outer tube (2).
7. A jacket structure arrangement according to claim 1, characterized in that the inner pipe (3) and the outer pipe (2) are both steel pipes.
8. A jacket structure arrangement according to claim 1, characterized in that the outer wall of the jacket (1) where it is surrounded by the outer pipe (2) is provided with a first rough surface layer.
9. A jacket structure arrangement according to claim 1, characterized in that the inner wall of the outer pipe (2) is provided with a second rough surface layer.
10. A jacket structure arrangement according to any one of claims 1-9, characterized in that the outer wall of the outer pipe (2) is provided with a third rough surface layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920213172.5U CN210317184U (en) | 2019-02-19 | 2019-02-19 | Sleeve structure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920213172.5U CN210317184U (en) | 2019-02-19 | 2019-02-19 | Sleeve structure device |
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| Publication Number | Publication Date |
|---|---|
| CN210317184U true CN210317184U (en) | 2020-04-14 |
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| CN201920213172.5U Active CN210317184U (en) | 2019-02-19 | 2019-02-19 | Sleeve structure device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112127800A (en) * | 2020-09-17 | 2020-12-25 | 西南石油大学 | Casing device for reducing casing shearing deformation and using method thereof |
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2019
- 2019-02-19 CN CN201920213172.5U patent/CN210317184U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112127800A (en) * | 2020-09-17 | 2020-12-25 | 西南石油大学 | Casing device for reducing casing shearing deformation and using method thereof |
| CN112127800B (en) * | 2020-09-17 | 2022-04-08 | 西南石油大学 | Casing device for reducing casing shearing deformation and using method thereof |
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