CN211623351U - Casing floating coupling for well cementation of oil and gas well - Google Patents
Casing floating coupling for well cementation of oil and gas well Download PDFInfo
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- CN211623351U CN211623351U CN201922488441.1U CN201922488441U CN211623351U CN 211623351 U CN211623351 U CN 211623351U CN 201922488441 U CN201922488441 U CN 201922488441U CN 211623351 U CN211623351 U CN 211623351U
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- casing
- pressure plate
- blasting pressure
- coupling
- coupling shell
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Abstract
The utility model relates to a casing floating collar for oil and gas well cementing, which comprises a coupling shell, a casing nipple connected with an opening at one end through threads, and a blasting pressure plate, wherein the blasting pressure plate is positioned inside the coupling shell, one side edge of the blasting pressure plate is fixed through a foundation surface of an integrated structure with the coupling shell, and the other side edge of the blasting pressure plate is fixed through the end part of the casing nipple; the utility model has the advantages of reasonable design, through the blasting pressure plate that adopts special material, after showy coupling goes down to predetermined position, explode the pressure plate into granule in small, broken bits through the pressurized mode of well head to guaranteed that the internal diameter of showy coupling is unanimous with the sleeve pipe internal diameter, more do not have the phenomenon that the inner assembly can't drop.
Description
Technical Field
The utility model relates to an oil gas well cementation is instrument technical field in the pit especially relates to an oil gas well cementing floats coupling with sleeve pipe.
Background
The horizontal well is an effective technical measure for improving the yield of the compact reservoir and the shale gas well. At present, the large displacement horizontal well is characterized by large inclination, long open hole and long steady-inclination well section. As the drilling technology of the horizontal well is improved day by day, the length of the horizontal section passing through is larger and larger, and the difficulty of well cementation is more and more. How to ensure the safe running of the casing is always a major technical difficulty.
At present, the floating casing running technology is obtained on the basis of a great deal of research and experiments at home and abroad, and is one of the most effective methods for solving the problem of casing running difficulty of horizontal wells, highly deviated wells and highly deviated horizontal wells. Related tools meeting the requirements of the floating casing running technology appear in China, but the existing casing floating coupling mainly has the following defects: firstly, the opening pressure is inaccurate to control and is easy to open in advance or cannot be opened; secondly, the internal component cannot fall to the bottom of the well after being opened; and thirdly, the inner diameter of the floating coupling is smaller than the inner diameter of the casing by 2mm or more, so that the inner drift diameter of the whole casing string is reduced.
Disclosure of Invention
In order to solve the deficiencies in the prior art, the utility model aims to provide an oil gas well cementing is with sleeve pipe floating coupling.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model provides an oil gas well cementing floats coupling with sleeve pipe, includes coupling shell and the casing nipple joint rather than one end opening part threaded connection, its characterized in that:
the pipe coupling shell is characterized by further comprising a blasting pressure plate, wherein the blasting pressure plate is located inside the coupling shell, one side edge of the blasting pressure plate is fixed through a base face of a structure integrated with the coupling shell, and the other side edge of the blasting pressure plate is fixed through the end portion of the casing nipple.
The outer wall of the casing nipple is provided with a thread section connected with the coupling shell, the end part of the thread section of the casing nipple is also provided with a functional section which is extended outwards in the axial direction, and the end part of the functional section is in contact with the blasting pressure plate.
And an annular groove is formed in the connecting surface of the inner wall of the casing nipple or the outer wall of the casing nipple and is embedded with a sealing ring used for sealing the connecting surface of the coupling shell and the casing nipple.
And an annular bulge is arranged on the inner wall of the coupling shell, and the base surface is arranged on one side of the annular bulge, which faces the casing nipple.
The blasting pressure plate is a circular panel, and the lateral wall of the outer side of the blasting pressure plate is in clearance fit connection with the inner wall of the coupling shell.
The utility model has the advantages that:
structural design is reasonable, through the blasting pressure plate that adopts special material, after floating the coupling and going to predetermined position, explode the pressure plate into the granule in small, broken bits through the pressurized mode of well head to guaranteed that the internal diameter of floating the coupling is unanimous with the sleeve pipe internal diameter, more do not have the unable phenomenon that drops of inner assembly.
The oil-gas well cementing casing floating coupling adopts a structure of blasting pressure plates to replace other internal components in the prior art, so that the inner diameter of a tool is consistent with the inner diameter of a casing string, and the passing inner diameter required by subsequent operation is effectively ensured; meanwhile, well cementation accidents caused by the fact that the falling component in the existing structure cannot fall off the well bottom are effectively avoided;
meanwhile, compared with the prior art, the floating coupling of the casing for well cementation of the oil and gas well has the advantages that the production efficiency is high due to the fact that the internal assembly is not machined, and raw material consumption and machining cost are reduced.
The casing floating coupling for well cementation of the oil-gas well can be used for horizontal wells, highly deviated wells, large-displacement horizontal wells and the like, and can be used for the situations that casing is difficult to run and cannot be run by the self weight of the casing, the performance is stable, the well cementation quality is good, and powerful guarantee is provided for the development and the perfection of the horizontal wells.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural view of the half-section state of the present invention.
In the figure: 1. a coupling housing; 2. blasting a pressure plate; 3. an O-shaped sealing ring; 4. a casing nipple; 5, a functional segment; 6 annular raised portion.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
According to the illustration of FIG. 1: this embodiment provides an oil gas well cementation is with casing floating collar, including coupling shell 1, casing nipple 4 and blasting pressure plate 2, wherein:
an internal thread is processed on the inner wall of one end of the coupling shell 1, an external thread is processed on the outer side of one end of the casing nipple 4 and is inserted into the opening of the coupling shell 1 to be in threaded connection with the coupling shell, and at the moment, the coupling shell 1 and the casing nipple 4 are connected into a whole;
the blasting pressure plate 2 is positioned in the coupling shell 1, the blasting pressure plate 2 is a circular panel, the side wall of the outer side of the blasting pressure plate 2 is in clearance fit connection with the inner wall of the coupling shell 1, and the blasting pressure plate 2 is preset in the coupling shell 1 before the coupling shell 1 is in threaded connection with the casing nipple 4;
an annular bulge part 6 is arranged on the inner wall of the coupling shell 1, the base surface is arranged on one side, facing the casing nipple 4, of the annular bulge part 6, the base surface is a vertically distributed plane, and the base surface supports and fixes the edge of one side of the blasting pressure plate 2;
the external thread part on the outer wall of the casing pipe nipple 4 is a threaded section, and the casing pipe nipple 4 is also provided with a functional section 5 which is arranged to extend outwards and axially at the end part of the threaded section, namely, compared with the prior art, the functional section 5 with a specified length is added on the casing pipe nipple 4, and the end face of the functional section 5 supports and fixes the edge of the other side of the bursting pressure plate 2;
furthermore, an annular groove is formed in the outer wall of the functional section 5 of the casing nipple 4, and an O-shaped sealing ring for sealing the connecting surface of the coupling shell 1 and the casing nipple 4 is embedded in the annular groove, so that a good sealing effect is achieved, and two sides of the blasting pressure plate 2 are separately and hermetically arranged;
through the structure, the upper part and the lower part of the casing are isolated, and the floating of the oil-gas well cementing casing floating coupling to the well bottom casing is realized.
When the floating coupling for the casing pipe for well cementation of the oil and gas well is used, the bottom end of the casing pipe is connected with the floating shoe, the floating collar and the sealing blind plate, the floating coupling of the utility model is connected after the casing pipe with the designed length is connected, the drilling fluid is forbidden to be filled before the floating coupling of the utility model is connected, the air filling below the floating coupling is kept, the pressure of the casing pipe at the horizontal section to the well wall is reduced, thereby the friction force between the casing pipe and the well wall is reduced, and the smooth placement of the casing pipe is facilitated; the utility model discloses a float connecting sleeve to wellhead more than coupling to in time fill the drilling fluid with the sleeve pipe, be used for improving sheathed tube gravity, improve the driving force that the sleeve pipe was transferred.
Put the back in place at the casing string, the well head pressurization acts on blasting pressure plate 2, and 2 materials of blasting pressure plate are borosilicate, and pressure can explode blasting pressure plate 2 into the granule in small, broken bits, and the granule in small, broken bits circulates out the sleeve pipe along with the drilling fluid, has realized that the drilling fluid circulation of whole casing string and the interior latus rectum of whole casing string are unanimous.
The above is only the preferred embodiment of the present invention, as long as the preferred embodiment is realized by the same means, the objective technical solution of the present invention all belongs to the protection scope of the present invention.
Claims (5)
1. The utility model provides an oil gas well cementing floats coupling with sleeve pipe, includes coupling shell and the casing nipple joint rather than one end opening part threaded connection, its characterized in that:
the pipe coupling shell is characterized by further comprising a blasting pressure plate, wherein the blasting pressure plate is located inside the coupling shell, one side edge of the blasting pressure plate is fixed through a base face of a structure integrated with the coupling shell, and the other side edge of the blasting pressure plate is fixed through the end portion of the casing nipple.
2. The floating collar of casing for oil and gas well cementing according to claim 1, wherein: the outer wall of the casing nipple is provided with a thread section connected with the coupling shell, the end part of the thread section of the casing nipple is also provided with a functional section which is extended outwards in the axial direction, and the end part of the functional section is in contact with the blasting pressure plate.
3. The floating collar of casing for oil and gas well cementing according to claim 1, wherein: and an annular groove is formed in the connecting surface of the inner wall of the casing nipple or the outer wall of the casing nipple and is embedded with a sealing ring used for sealing the connecting surface of the coupling shell and the casing nipple.
4. The floating collar of casing for oil and gas well cementing according to claim 1, wherein: and an annular bulge is arranged on the inner wall of the coupling shell, and the base surface is arranged on one side of the annular bulge, which faces the casing nipple.
5. The floating collar of casing for oil and gas well cementing according to claim 1, wherein: the blasting pressure plate is a circular panel, and the lateral wall of the outer side of the blasting pressure plate is in clearance fit connection with the inner wall of the coupling shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922488441.1U CN211623351U (en) | 2019-12-19 | 2019-12-19 | Casing floating coupling for well cementation of oil and gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922488441.1U CN211623351U (en) | 2019-12-19 | 2019-12-19 | Casing floating coupling for well cementation of oil and gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211623351U true CN211623351U (en) | 2020-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922488441.1U Active CN211623351U (en) | 2019-12-19 | 2019-12-19 | Casing floating coupling for well cementation of oil and gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211623351U (en) |
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2019
- 2019-12-19 CN CN201922488441.1U patent/CN211623351U/en active Active
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