CN216008420U - Thermal recovery well casing coupling protection device - Google Patents
Thermal recovery well casing coupling protection device Download PDFInfo
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- CN216008420U CN216008420U CN202121503761.0U CN202121503761U CN216008420U CN 216008420 U CN216008420 U CN 216008420U CN 202121503761 U CN202121503761 U CN 202121503761U CN 216008420 U CN216008420 U CN 216008420U
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- ring body
- protection device
- casing coupling
- production well
- coupling
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Abstract
The utility model relates to a device for oil field exploitation, in particular to a thermal production well casing coupling protection device. The device comprises a metal sleeve, a fastening pin and a ring body; the metal sleeve is wrapped outside the ring body and used for protecting the ring body; the fastening pin is fixed at one end of the metal sleeve and used for axial fixation; the inner side of the ring body is provided with a plurality of grooves for providing space when the ring body is compressed, and one side without pins leans against the coupling. The thermal production well casing coupling protection device is fixed on the outer walls of two adjacent casings on two sides of a thermal production well casing coupling, and when the casing coupling is stretched under a high-temperature condition, the casing coupling protection device is extruded, so that the constraint stress generated by well cementation cement on a coupling step is reduced, and the high-temperature tripping phenomenon of the casing is avoided.
Description
Technical Field
The utility model relates to a device for oil field exploitation, in particular to a thermal production well casing coupling protection device.
Background
Steam injection thermal recovery is a main development mode of heavy oil reservoirs, and when high-temperature steam is injected into a thermal recovery well, a sleeve can be heated and stretched. The casing coupling plays the effect of connecting and sealed, and when the sleeve pipe extended, the cement sheath of fixed sleeve pipe can produce certain confining force to the step of ferrule department. The axial stress generated by the well cementation cement ring on the casing coupling step is called as the step effect, and the step effect accumulation can cause the tripping of the casing coupling, thereby seriously affecting the thermal recovery production effect.
The conventional well casing coupling protection device adopts a rubber piece as a stress buffer mechanism, and the buffer mechanism cannot be applied to a thermal production well because the rubber is decomposed at high temperature, so that the protection effect cannot be achieved, and the generated decomposed substances can corrode the casing or damage a well cementation cement sheath.
The Chinese utility model patent CN203191614U is an optical cable coupling protection device, which comprises a left half ring and a right half ring; the left half ring and the right half ring are fixedly installed together through a fastening device, the inner walls of the middle parts of the left half ring and the right half ring are respectively provided with a radial coupling ring groove which can be communicated with each other, and at least two axial optical cable grooves are distributed on the inner wall of the ring formed by the left half ring and the right half ring at intervals. The primary function of the device is to enable the cable to be safely lowered into the wellbore.
Chinese utility model patent CN201412082 discloses a sucker rod coupling protector, has fixture block and draw-in groove on its main, vice cutting ferrule both ends wall respectively, and the fixture block and the draw-in groove on the main cutting ferrule correspond card go into draw-in groove and the fixture block on the vice cutting ferrule. The device has the main function of protecting the sucker rod coupling from being broken by abrasion and being tripped due to the abrasion.
Chinese utility model patent CN2356206 discloses an oil pipe coupling protective sheath. The protective sleeve is made of rubber or nylon materials, chamfers are arranged on the inner circular surfaces of the upper end and the lower end of the protective sleeve, at least one groove is formed in the inner circular surface of the protective sleeve, at least two grooves are formed in the outer circular surface, and the number of the grooves in the outer circular surface is always larger than that of the grooves in the inner circular surface. The device mainly solves the problems that the tubing coupling is damaged by perforation due to crevice corrosion, the tube detection period is prolonged, the tubing coupling cannot be applied to the casing coupling after the well cementation of the thermal production well, and the step effect of the position of the coupling cannot be prevented.
No corresponding literature is currently being retrieved on thermal production well casing collar protection devices.
SUMMERY OF THE UTILITY MODEL
In order to prevent the step effect of the position of a casing coupling after the well cementation of the thermal production well, the utility model provides a protective device for the casing coupling of the thermal production well, wherein a ring body made of high-temperature-resistant flexible graphite material is used as a stress buffering mechanism, and a metal sleeve is arranged on the outer layer of the ring body; when the casing is elongated at high temperature, the casing coupling protection device for the thermal production well is extruded, so that the constraint stress generated by the confined coupling step of the well cementation cement can be reduced.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a thermal production well casing coupling protection device, which comprises a metal sleeve, a fastening pin and a ring body, wherein the metal sleeve is fixedly connected with the fastening pin; the metal sleeve is wrapped outside the ring body and used for protecting the ring body; the fastening pin is fixed at one end of the metal sleeve and used for axial fixation; the inner side of the ring body is provided with a plurality of grooves for providing space when the ring body is compressed, and one side without pins leans against the coupling.
Furthermore, the metal sleeve is provided with a diameter change transition section which is arc-shaped.
Further, the metal sleeve is made of brass.
Furthermore, the ring body is made of flexible graphite.
Further, a holding pin is fixed at one end of the metal sleeve away from the casing collar of the thermal production well.
Compared with the prior art, the utility model has the following beneficial effects:
the thermal production well casing coupling protection device is fixed on the outer walls of two adjacent casings on two sides of a thermal production well casing coupling, and when the casing coupling is stretched under a high-temperature condition, the casing coupling protection device is extruded, so that the constraint stress generated by well cementation cement on a coupling step is reduced, and the high-temperature tripping phenomenon of the casing is avoided.
Drawings
FIG. 1 is a schematic structural view of a casing coupling protection device for a thermal production well according to the present invention;
fig. 2 is a schematic installation diagram of the casing coupling protection device for the thermal production well according to the present invention.
The device comprises a metal sleeve 1, a fastening pin 2, a ring 3, a sleeve 4, a thermal production well sleeve coupling protection device 5 and a coupling 6.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the utility model as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the utility model. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, and/or combinations thereof, unless the context clearly indicates otherwise.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
Example 1
As shown in fig. 1, the casing coupling protection device for the thermal production well comprises a metal sleeve 1, a fastening pin 2 and a ring body 3; the metal sleeve 1 is wrapped outside the ring body 3 and used for protecting the ring body 3; the fastening pin 2 is fixed at one end of the metal sleeve 1 and used for axial fixation; the inner side of the ring body 3 is provided with a plurality of grooves for providing space for the compression. The metal sleeve 3 is provided with a diameter change transition section which is arc-shaped, so that stress concentration is reduced.
The metal sleeve 1 is made of brass, H96 brass is selected, and the metal sleeve has excellent cold and hot workability and no stress corrosion.
The ring body 3 is made of flexible graphite, has good elasticity, flexibility, impermeability and high temperature resistance, and can resist high temperature of 550 ℃.
The fastening pin 2 is fixed at one end of the metal sleeve 1 far away from the thermal production well casing collar. During installation, the metal sleeve 1 is firstly sleeved at one end of the sleeve 4, the ring body 3 is installed, then the sleeve 4 is connected with the coupling 6, finally the fixing pin 2 is tightened, one side without the pin is ensured to be close to the coupling, and the outer diameter of the metal sleeve is basically consistent with that of the coupling.
As shown in figure 2, the thermal production well casing coupling protection device 5 is arranged on the casing 4 at the position of a casing coupling 6, and is lowered into a well along with a casing string during thermal production well completion, and then is cemented by injecting thermal production cement.
All parts and parts which are not discussed in the utility model and the connection mode of all parts and parts in the application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Claims (5)
1. A thermal production well casing coupling protection device is characterized by comprising a metal sleeve, a fastening pin and a ring body;
the metal sleeve is wrapped outside the ring body and used for protecting the ring body; the fastening pin is fixed at one end of the metal sleeve and used for axial fixation; the inner side of the ring body is provided with a plurality of grooves, so that space is provided for the compression of the ring body, and the side without the pin is ensured to be close to the coupling.
2. The thermal production well casing coupling protector of claim 1 wherein the metal jacket has a diameter change transition section that is arcuate in shape.
3. The thermal production well casing coupling protection device of claim 1 or 2, wherein the metal casing is made of brass.
4. The thermal production well casing coupling protection device of claim 1, wherein the ring body is made of flexible graphite.
5. The thermal production well casing coupling protection device of claim 1, wherein the locking pin is secured to an end of the casing remote from the thermal production well casing coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121503761.0U CN216008420U (en) | 2021-07-01 | 2021-07-01 | Thermal recovery well casing coupling protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121503761.0U CN216008420U (en) | 2021-07-01 | 2021-07-01 | Thermal recovery well casing coupling protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216008420U true CN216008420U (en) | 2022-03-11 |
Family
ID=80529496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121503761.0U Active CN216008420U (en) | 2021-07-01 | 2021-07-01 | Thermal recovery well casing coupling protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216008420U (en) |
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2021
- 2021-07-01 CN CN202121503761.0U patent/CN216008420U/en active Active
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