CN210105770U - Telescopic combined casing - Google Patents
Telescopic combined casing Download PDFInfo
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- CN210105770U CN210105770U CN201920635828.2U CN201920635828U CN210105770U CN 210105770 U CN210105770 U CN 210105770U CN 201920635828 U CN201920635828 U CN 201920635828U CN 210105770 U CN210105770 U CN 210105770U
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- coupling
- telescopic
- casing
- sleeve
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- 230000008878 coupling Effects 0.000 claims abstract description 90
- 238000010168 coupling process Methods 0.000 claims abstract description 90
- 238000005859 coupling reaction Methods 0.000 claims abstract description 90
- 238000007789 sealing Methods 0.000 claims description 35
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000008646 thermal stress Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a scalable combination sleeve, including the sleeve pipe coupling, become to detain sleeve pipe, flexible coupling and telescopic tube, sleeve pipe coupling upper portion with send into sleeve pipe thread connection, the lower part with become to detain sleeve pipe upper end thread connection, become to detain sleeve pipe lower extreme and telescopic coupling upper end female connection, the diameter of detaining sleeve pipe upper thread end diameter and being less than the diameter of lower thread end, its lower thread end thickens outside the body to with telescopic coupling internal diameter phase-match, become to detain sleeve pipe lower thread end and play and become the knot effect, telescopic coupling lower part have an interior step, provide for the outer step in telescopic tube upper portion and hang the step. The utility model provides an oil gas well in the production process, when leading to the extension of the free casing section that does not seal up in the well because of thermal stress and thermal energy effect, the telescope tube can freely remove in flexible coupling, and the well head lifting problem that temperature variation arouses has been ensured to the last jacking force that the well head brought because of the intensification lengthening of sleeve pipe in the release well.
Description
Technical Field
The utility model belongs to the drilling engineering field of resources such as oil and gas, concretely relates to scalable combination sleeve pipe.
Background
When a high-temperature and high-pressure oil-gas well is produced, fluid in a shaft is in a high-speed flowing state, and casing and annular fluid are in a higher temperature state; airtight annular space also can produce great thermal expansion effect simultaneously, forms annular space thermal expansion pressure at the well head, and this pressure direct action can aggravate sleeve pipe axial deformation, under the combined action of well head thermal stress and annular space thermal expansion pressure, the well head can be pushed up to the sleeve pipe, leads to the well head lifting, destroys oil gas well pit shaft integrality to lead to the oil gas well to have great potential safety hazard during production. The measures for preventing and treating the problem of wellhead lifting mainly comprise: 1) selecting a high-steel-grade thermal production casing; 2) the ground anchor is lifted and prestressed; 3) selecting a high-temperature resistant cement paste system; 4) the length of the free section of the sleeve is reduced, and the like; the methods and measures can only reduce the elongation of the casing under the action of thermal stress to a certain extent and relieve the problem of wellhead lifting, but cannot completely solve the problem of wellhead lifting.
To the development of ocean high temperature high pressure oil gas well, deep water high temperature high pressure oil gas well, the potential safety hazard that the well head lifting brought is bigger, and prevention and cure expense is more high, consequently very necessary utility model a scalable combination sleeve pipe, it produces axial deformation under the thermal stress effect and leads to the well head lifting difficult problem to thoroughly solve the interior sleeve pipe free section of well, ensures high temperature high pressure oil gas well pit shaft integrality during production.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a scalable combination sleeve pipe lies in providing, can the interior sleeve pipe free section of safety release well because of the last jacking force that thermal stress extension brought for the well head, solve the well head lifting problem that temperature variation arouses to ensure oil gas well safety in production.
In order to solve the technical problem, the utility model discloses following technical scheme has been taken:
a telescopic combined casing comprises a casing coupling, a variable buckle casing, a telescopic coupling and a telescopic casing, wherein the upper part of the casing coupling is in threaded connection with a feeding casing, the lower part of the casing coupling is in threaded connection with the upper end of the variable buckle casing, the lower end of the variable buckle casing is in threaded connection with the upper end of the telescopic coupling, the diameter of the upper threaded end of the variable buckle casing is smaller than that of the lower threaded end, the lower threaded end of the variable buckle casing is thickened outside a pipe body and is matched with the inner diameter of the telescopic coupling, the lower threaded end of the variable buckle casing plays a role of variable buckle, the lower part of the telescopic coupling is provided with an inner step which provides a hanging step for the outer step on the upper part of the telescopic casing, a plurality of semi-circular grooves are uniformly distributed on the inner diameter wall of the inner step of the telescopic coupling, sealing O-shaped rings are arranged in the semi-circular grooves, the sealing O-shaped rings are in contact with the outer wall of the, a plurality of semicircular grooves are uniformly distributed on the outer diameter wall of the outer step, sealing O-shaped rings are arranged in the semicircular grooves, the sealing O-shaped rings are contacted with the inner wall of the telescopic coupling to form multistage sealing, an outer step at the upper part of the telescopic sleeve is hung on an inner step at the lower part of the telescopic coupling, external threads at the lower end of the telescopic sleeve are matched and connected with internal threads of the coupling of the well sleeve, a sealing gasket is arranged between the inner step of the telescopic coupling and the outer step at the upper part of the telescopic sleeve, the sealing gasket is fixed on the inner step of the telescopic coupling, the thickness is about 5cm, the sealing gasket is an annular rubber gasket, the inner diameter of the sealing gasket is matched with the outer diameter of the telescopic sleeve, the outer diameter of the sealing gasket is matched with the inner diameter of the telescopic coupling, enough moving space is kept from the sealing gasket on the inner step of the telescopic coupling to the lower thread end of the buckle changing sleeve, the telescopic coupling can freely move in the axial direction, and the inner wall of the telescopic coupling is smooth, and the requirement of the corrosion resistance grade is higher than 13 cr.
The heights of the inner step and the outer step are both 50 cm.
The diameter of the telescopic casing pipe is matched with the inner diameter of the casing coupling in the well, and the length of the telescopic casing pipe is about 2 meters.
The wall thickness of the telescopic coupling is half of that of the casing coupling in the well.
The outer diameter of the telescopic coupling is matched with that of the casing coupling, and the length of the telescopic coupling is about 8 meters.
The size of the variable-buckle casing pipe is matched with that of the casing coupling in the well, and the length of the variable-buckle casing pipe is about 2 meters.
The length size of the casing coupling is matched with that of the casing coupling in the well.
The utility model has the advantages of it is following:
(1) simple structure, convenient processing and low investment cost.
(2) The application prospect is good, and the method can be widely applied to high-temperature and high-pressure oil and gas wells.
(3) Simple field operation and no operation risk
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1 casing coupling, 2 casing pipes that become to detain, 3 flexible couplings, 4 sealed O shape circles, 5 seal gaskets, 6 telescopic tube.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, a telescopic combined casing comprises a casing coupling 1, a variable buckle casing 2, a telescopic coupling 3 and a telescopic casing 6, wherein the upper part of the casing coupling 1 is in external thread connection with a feeding casing, the lower part of the casing coupling is in external thread connection with the upper end of the variable buckle casing 2, the casing coupling 1 plays a role of connecting an upper casing string and a lower casing string, the lower end of the variable buckle casing 2 is in internal thread connection with the upper end of the telescopic coupling 3, the diameter of the upper thread end of the variable buckle casing 2 is smaller than that of the lower thread end, the lower thread end of the variable buckle casing 2 is thickened outside a pipe body and is matched with the inner diameter of the telescopic coupling 3, the lower thread end of the variable buckle casing 2 plays a role of variable buckle, the lower part of the telescopic coupling 3 is provided with an inner step for providing a hanging step for the outer step on the upper part of the telescopic casing 6, a plurality of semicircular grooves are uniformly distributed on the inner step, the sealing O-shaped ring 4 is contacted with the outer wall of the telescopic sleeve 6 to form multi-stage sealing, the upper part of the telescopic sleeve 6 is provided with an outer step, the outer diameter of the outer step is matched with the inner diameter of the telescopic coupling 3, a plurality of semicircular grooves are uniformly distributed on the outer diameter wall of the outer step, the sealing O-shaped ring 4 is arranged in each semicircular groove, the sealing O-shaped ring 4 is contacted with the inner wall of the telescopic coupling 3 to form multi-stage sealing, the outer step at the upper part of the telescopic sleeve 6 is hung on the inner step at the lower part of the telescopic coupling 3, the inner step provides hanging force for the well casing string, the external thread at the lower end of the telescopic sleeve 6 is matched and connected with the internal thread of the well casing coupling, a sealing gasket 5 is arranged between the inner step of the telescopic coupling 3 and the outer step at the upper part of the telescopic sleeve 6, the sealing gasket 5 is fixed on the inner, the outer diameter of the sealing gasket 5 is matched with the inner diameter of the telescopic coupling 3, the sealing function and the function of protecting the contact end face between the telescopic coupling 3 and the telescopic sleeve 6 are achieved, enough moving space is kept from the sealing gasket 5 on the inner step of the telescopic coupling 3 to the lower thread end of the thread-changing sleeve 2, the sealing gasket can freely move in the axial direction for the telescopic sleeve 6, and the inner wall of the telescopic coupling 3 is smooth and the anti-corrosion grade is required to be higher than 13 cr.
The sealing O-shaped ring 4 is divided into two sizes, the small sealing O-shaped ring 4 is matched with the inner diameter of the inner step at the lower part of the telescopic coupling 3 and is arranged in a plurality of semicircular grooves uniformly distributed on the inner diameter wall of the inner step at the lower part of the telescopic coupling 3; the large-size sealing O-shaped ring 4 is matched with the outer diameter of the outer step at the upper part of the telescopic sleeve 6 and is arranged in a plurality of semicircular grooves uniformly distributed on the outer wall of the outer step at the upper part of the telescopic sleeve 6 to play a role of multistage sealing.
The heights of the inner step and the outer step are both 50 cm.
The diameter of the telescopic sleeve 6 is matched with the inner diameter of a well casing coupling, and the length of the telescopic sleeve is about 2 meters.
The wall thickness of the telescopic coupling 3 is half of that of the well casing coupling.
The outer diameter of the telescopic coupling 3 is matched with the outer diameter of the casing coupling 1, and the length is about 8 meters.
The size of the variable buckle casing 2 is matched with that of a casing coupling in the well, and the length of the variable buckle casing is about 2 meters.
The length dimension of the casing coupling 1 is matched with that of the casing coupling in the well.
The inner diameter of the inner step is matched with the outer diameter of a casing string in the well.
To the use of the utility model, the method is as follows:
① hanging the casing string on wellhead slips;
② hoisting the telescopic combined casing to the upper part of the casing string by using a top drive;
③ after the telescopic combined casing is buckled with the casing string, the telescopic combined casing is connected with the casing string by using casing tongs and is put into the well;
④ hanging the feeding casing above the telescopic combined casing by using a top drive;
⑤ after the feeding casing pipe is buckled with the retractable combination casing pipe, the feeding casing pipe is combined with the retractable casing pipe by using casing tongs for connection;
⑥ the running casing is connected with the running casing and the casing string is sent to the designated depth for well cementation.
The utility model provides an oil gas well in the production process, when leading to the extension of the free casing section that does not seal up in the well because of thermal stress and thermal energy effect, the telescope tube can freely remove in flexible coupling, and the casing string becomes the top force that brings for the well head because of rising up the length in the release well, and the well head lifting problem that temperature variation arouses has ensured oil gas well safety in-process.
The present invention has been described in detail with reference to the accompanying drawings, which are incorporated herein by reference, and the like, and it is to be understood that the invention is not limited to the precise forms disclosed, and that various modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (7)
1. A retractable combined sleeve is characterized in that: comprises a casing coupling (1), a variable buckle casing (2), a telescopic coupling (3) and a telescopic casing (6), wherein the upper part of the casing coupling (1) is connected with the external thread of a feeding casing, the lower part of the casing coupling is connected with the external thread of the upper end of the variable buckle casing (2), the lower end of the variable buckle casing (2) is connected with the internal thread of the upper end of the telescopic coupling (3), the diameter of the upper thread end of the variable buckle casing (2) is smaller than that of the lower thread end, the lower thread end of the variable buckle casing is thickened outside a pipe body and is matched with the internal diameter of the telescopic coupling (3), the lower thread end of the variable buckle casing (2) plays a buckling role, the lower part of the telescopic coupling (3) is provided with an internal step, a hanging step is provided for the external step on the upper part of the telescopic casing (6), a plurality of semicircular grooves are uniformly distributed on the internal step internal diameter wall of the telescopic coupling (3), sealing O-shaped rings (4) are arranged in the semicircular grooves, and the sealing O, the upper part of the telescopic sleeve (6) is provided with an outer step, the outer diameter of the outer step is matched with the inner diameter of the telescopic coupling (3), a plurality of semicircular grooves are uniformly distributed on the outer diameter wall of the outer step, sealing O-shaped rings (4) are arranged in the semicircular grooves, the sealing O-shaped rings (4) are contacted with the inner wall of the telescopic coupling (3) to form multistage sealing, the outer step at the upper part of the telescopic sleeve (6) is hung on the inner step at the lower part of the telescopic coupling (3), the external thread at the lower end of the telescopic sleeve (6) is matched and connected with the internal thread of the coupling in the well, a sealing gasket (5) is arranged between the inner step of the telescopic coupling (3) and the outer step at the upper part of the telescopic sleeve (6), the sealing gasket (5) is fixed on the inner step of the telescopic coupling (3) and has the thickness of about 5cm, the sealing gasket, the outer diameter of the telescopic coupling is matched with the inner diameter of the telescopic coupling (3), a sufficient moving space is reserved from a sealing gasket (5) on an inner step of the telescopic coupling (3) to a thread end below the thread-changing sleeve (2), free movement can be provided for the telescopic sleeve (6) in the axial direction, and the inner wall of the telescopic coupling (3) is smooth and the requirement of the corrosion resistance grade is higher than 13 cr.
2. A retractable combination sleeve as claimed in claim 1, wherein: the heights of the inner step and the outer step are both 50 cm.
3. A retractable combination sleeve as claimed in claim 1, wherein: the diameter of the telescopic casing (6) is matched with the inner diameter of a casing coupling in the well, and the length of the telescopic casing is about 2 meters.
4. A retractable combination sleeve as claimed in claim 1, wherein: the wall thickness of the telescopic coupling (3) is half of that of the well casing coupling.
5. A retractable combination sleeve as claimed in claim 1, wherein: the outer diameter of the telescopic coupling (3) is matched with the outer diameter of the casing coupling (1), and the length of the telescopic coupling is about 8 meters.
6. A retractable combination sleeve as claimed in claim 1, wherein: the size of the variable buckle casing (2) is matched with that of a casing coupling in the well, and the length of the variable buckle casing is about 2 meters.
7. A retractable combination sleeve as claimed in claim 1, wherein: the length size of the casing coupling (1) is matched with that of the casing coupling in the well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920635828.2U CN210105770U (en) | 2019-05-06 | 2019-05-06 | Telescopic combined casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920635828.2U CN210105770U (en) | 2019-05-06 | 2019-05-06 | Telescopic combined casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210105770U true CN210105770U (en) | 2020-02-21 |
Family
ID=69538910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920635828.2U Withdrawn - After Issue CN210105770U (en) | 2019-05-06 | 2019-05-06 | Telescopic combined casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210105770U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029947A (en) * | 2019-05-06 | 2019-07-19 | 中国海洋石油集团有限公司 | A kind of scalable assembled casing |
-
2019
- 2019-05-06 CN CN201920635828.2U patent/CN210105770U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029947A (en) * | 2019-05-06 | 2019-07-19 | 中国海洋石油集团有限公司 | A kind of scalable assembled casing |
| CN110029947B (en) * | 2019-05-06 | 2024-04-09 | 中国海洋石油集团有限公司 | Telescopic combined sleeve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200221 Effective date of abandoning: 20240409 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20200221 Effective date of abandoning: 20240409 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |