CN212642634U - Slip type casing tie-back device - Google Patents
Slip type casing tie-back device Download PDFInfo
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- CN212642634U CN212642634U CN202020922359.5U CN202020922359U CN212642634U CN 212642634 U CN212642634 U CN 212642634U CN 202020922359 U CN202020922359 U CN 202020922359U CN 212642634 U CN212642634 U CN 212642634U
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- slip
- sealing ring
- tieback
- type casing
- extension cylinder
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Abstract
The utility model discloses a slip type casing tie-back device, which comprises an upper joint, an extension cylinder, a body, a guide shoe, a sealing ring, a protective sleeve, slips, a control ring and a trapezoidal sealing ring; the upper joint, the extension cylinder, the body and the guide shoe are sequentially connected end to end from top to bottom, and a protective sleeve, a sealing ring, a slip and a control ring are arranged in the body; in the slip type casing pipe tieback device of the utility model, the trapezoidal sealing ring arranged at the inner side of the control ring and the two third O-shaped sealing rings at the outer side can isolate the formation fluid from the bearing part slips after tieback, thereby reducing the corrosion rate of the slips; the bottom of the control ring is in a sawtooth shape, so that the tubular column to be tieback can be further trimmed in the tieback operation process; the sealing ring both sides of body inboard adopt interference fit, possess better two-way sealed effect.
Description
Technical Field
The utility model belongs to the technical field of oil drilling, a slip formula sleeve pipe tieback ware is related to particularly.
Background
In the process of oil field development, due to the existence of formation corrosion fluid, in addition, in the process of drilling, completing and repairing, the casing pipe is worn by a tool which is put in the well and has defects, so that the problem of perforation of a guide pipe or a casing pipe of an oil-gas well can occur, and the safety of oil-gas production is directly influenced. Typically, a re-sidetrack, an inner patch casing, or a casing tieback may be used. Due to the cost of re-sidetracking is prohibitive; the inner patch casing pipe is mostly expanded and patched by an expansion pipe, so that the residual stress is overlarge after expansion, the sealing is not tight, and the inner drift diameter is reduced. Therefore, the casing tieback can carry out corresponding tieback work after cutting and fishing aiming at shallow pipes or damaged casings. The tieback ware slips load-carrying position that adopts at present does not realize leading to load-carrying position to corrode with formation fluid is isolated, in addition, because the work of polishing in earlier stage of sleeve pipe is not in place, appears sealed not tight condition after the tieback.
SUMMERY OF THE UTILITY MODEL
The utility model discloses what solve is that the bearing position that exists corrodes and tie-back sealed not tight problem in the current tie-back ware, provides a slip formula sleeve pipe tie-back ware, can realize the integrality of pit shaft.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
a slip type casing tie-back device comprises an upper joint, an extension cylinder, a body, a guide shoe, a sealing ring, a protective sleeve, a slip, a control ring and a trapezoidal sealing ring;
the upper joint, the extension cylinder, the body and the guide shoe are sequentially connected end to end from top to bottom, and a protective sleeve, a sealing ring, a slip and a control ring are arranged in the body;
a sealing ring mounting groove is formed at the position of the sealing ring mounted on the inner wall of the body, and a tooth-shaped spiral slip groove is formed at the position of the slip mounted on the inner wall of the body; the outer wall of the protective sleeve is tightly attached to the inner side of the sealing ring, and plays a role in protection before entering a well and being connected back;
the inner wall of the slip is provided with slip teeth, the inner diameter of the slip teeth is smaller than that of the outer wall of the sleeve, the outer wall of the slip is provided with left-handed wide teeth which are matched with the left-handed wide teeth on the inner side of the body for limiting, and the teeth on the inner side of the body are deeper and can reserve space after the slip is expanded; the slip wall is formed with a notch groove, and the control ring is provided with a boss matched with the notch groove and used for limiting the position of the control ring;
the inner side of the upper end of the control ring is provided with a trapezoidal sealing ring, and the lower end edge of the control ring is serrated, so that the possibility of scratching a sealing element in the process of splicing the sleeve is reduced.
In the technical scheme, the upper end of the upper connector is provided with a female buckle, and the lower end of the upper connector is provided with a male buckle; the upper end of the extension cylinder is a female buckle and is connected with the male buckle end of the upper connector, and the lower end of the extension cylinder is a male buckle; the upper end and the lower end of the body are provided with female buttons, and the upper part of the body is connected with the extension cylinder through threads; the upper end of the guide shoe is connected with the body through threads.
In the technical scheme, the inner diameter of the upper joint is the same as the inner diameter of the tie-back casing, the inner diameter of the extension cylinder and the body is larger than the outer diameter of the casing, and the inner diameter of the slip is smaller than the outer diameter of the casing.
In the technical scheme, the lower part of the guide shoe is in a right spiral shape.
In the above technical scheme, the male buckle end of the upper joint is provided with two first O-shaped sealing rings, the male buckle end of the extension cylinder is provided with two second O-shaped sealing rings, and the outer side of the control ring is provided with two third O-shaped sealing rings.
In the above technical solution, the number of the sealing rings, the corresponding sealing ring mounting grooves and the protruding rings on the outer wall of the protective sleeve is greater than or equal to 2.
In the technical scheme, the cross section of the sealing ring is in a shape of a Chinese character shan.
In the technical scheme, the wall of the slip is provided with 8 slots at equal intervals around the circumference, wherein 1 slot is a through slot, the rest 7 slots are non-through slots starting from the upper end, and the tail end of each slot is provided with a small hole.
The utility model has the advantages that:
1. the utility model provides a slip type casing tie-back device, a trapezoidal sealing ring arranged at the inner side of a control ring and two third O-shaped sealing rings at the outer side can isolate formation fluid from a bearing part slip after tie-back, thereby reducing the corrosion rate of the slip;
2. the utility model provides a slip type casing tie-back device, the bottom of the control ring is in a zigzag shape, which is beneficial to further finishing the pipe column to be tie-back in the tie-back operation process;
3. the utility model provides a slip formula sleeve pipe tieback ware, interference fit is adopted to the inboard sealing ring both sides of body, possesses better sealed effect.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a first schematic view of a slip configuration.
FIG. 3 is a second schematic view of a slip configuration.
Fig. 4 is a schematic view of a seal ring structure.
Fig. 5 is a schematic diagram of a control loop architecture.
Wherein: in the figure: 1 is the top connection, 2 is first O type sealing washer, 3 is an extension section of thick bamboo, 4 is second O type sealing washer, 5 is the body, 6 is the protective sheath, 7 is the sealing ring, 8 is the slips, 9 is the control ring, 10 is third O type circle, 11 is trapezoidal sealing ring, 12 is the guide shoe.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical field person understand the solution of the present invention better, the technical solution of the present invention is further described below with reference to the specific embodiments.
Examples
A slip type casing tieback comprises an upper joint 1, an extension cylinder 3, a body 5, a guide shoe 12, a sealing ring 7, a protective sleeve 6, slips 8, a control ring 9 and a trapezoidal sealing ring 11;
the upper connector, the extension cylinder, the body and the guide shoe are sequentially connected end to end from top to bottom, the upper end of the upper connector is provided with a female buckle, and the lower end of the upper connector is provided with a male buckle; the upper end of the extension cylinder is a female buckle and is connected with the male buckle end of the upper connector, and the lower end of the extension cylinder is a male buckle; the upper end and the lower end of the body are provided with female buttons, and the upper part of the body is connected with the extension cylinder through threads; the upper end of the guide shoe is connected with the body through threads. The male buckle end of the upper joint is provided with two first O-shaped sealing rings 2, the male buckle end of the extension cylinder is provided with two second O-shaped sealing rings 4, and the outer side of the control ring is provided with two third O-shaped sealing rings 10. The inner diameter of the upper joint is smaller than the inner diameters of the extension cylinder and the body, and the inner diameter of the extension cylinder is equal to the inner diameter of the body. The lower part of the guide shoe is in a right spiral shape, so that the guide shoe is convenient to butt joint with a guide pipe or a sleeve.
This internal protective sheath, sealing ring, slips and the control ring of being provided with.
2 sealing ring mounting grooves are formed in the inner wall of the body, 2 sealing rings are mounted on the sealing ring mounting grooves, the cross sections of the sealing rings are in a shape like a Chinese character 'shan', and the sealing ring mounting grooves are in a dovetail shape; the outer wall of the protective sleeve is tightly attached to the inner side of the sealing ring, and plays a role in protection before entering a well and being connected back.
And a toothed spiral slip groove is formed at the position of the slip mounted on the inner wall of the body.
8 slots are equidistantly arranged on the wall of the slip around the circumference, wherein 1 slot is a through slot, the rest 7 slots are non-through slots started from the upper end, and a small hole is formed at the tail end of each slot.
The inner side of the upper end of the control ring is provided with a trapezoidal sealing ring, and the lower end edge of the control ring is in a sawtooth shape. The possibility of scratching the sealing element in the process of connecting back the sleeve is reduced.
During the pipe or casing tieback process, after the end of the lower casing pile is introduced into the tieback tool through the guide shoe, the casing pile can enter the slips by applying an axial pressure. Along with the embolia of fish, the slips goes upward and expands, continues to push down tieback instrument, and the casing pile withstands sealed packing element protective sheath, and casing pile and protective sheath are tightly leaned on together and are moved up, and sealed section of thick bamboo just overlaps the casing pile outer wall, forms sealedly. And lifting the pipe column, moving the slips downwards in the cylinder body, and enabling the slip teeth to bite the casing pipe to firmly grasp the casing pipe pile.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The invention has been described above by way of example, and it should be noted that any simple variants, modifications or other equivalent substitutions by a person skilled in the art without spending creative effort may fall within the scope of protection of the present invention without departing from the core of the present invention.
Claims (8)
1. A slip type casing tieback device is characterized in that: the device comprises an upper joint, an extension cylinder, a body, a guide shoe, a sealing ring, a protective sleeve, a slip, a control ring and a trapezoidal sealing ring;
the upper joint, the extension cylinder, the body and the guide shoe are sequentially connected end to end from top to bottom, and a protective sleeve, a sealing ring, a slip and a control ring are arranged in the body;
a sealing ring mounting groove is formed at the position of the sealing ring mounted on the inner wall of the body, and a tooth-shaped spiral slip groove is formed at the position of the slip mounted on the inner wall of the body; the outer wall of the protective sleeve is tightly attached to the inner side of the sealing ring;
the inner wall of the slip is provided with slip teeth, the inner diameter of the slip teeth is smaller than that of the outer wall of the sleeve, and the outer wall of the slip is provided with left-handed wide teeth which are matched with the left-handed wide teeth on the inner side of the body for limiting;
the inner side of the upper end of the control ring is provided with a trapezoidal sealing ring, and the lower end edge of the control ring is in a sawtooth shape.
2. A slip-type casing tieback as claimed in claim 1, wherein: the upper end of the upper connector is provided with a female buckle, and the lower end of the upper connector is provided with a male buckle; the upper end of the extension cylinder is a female buckle and is connected with the male buckle end of the upper connector, and the lower end of the extension cylinder is a male buckle; the upper end and the lower end of the body are provided with female buttons, and the upper part of the body is connected with the extension cylinder through threads; the upper end of the guide shoe is connected with the body through threads.
3. A slip-type casing tieback as claimed in claim 1, wherein: the inner diameter of the upper joint is the same as that of the tie-back casing, the inner diameter of the extension cylinder and the body is larger than the outer diameter of the casing, and the inner diameter of the slip is smaller than the outer diameter of the casing.
4. A slip-type casing tieback as claimed in claim 1, wherein: the lower part of the guide shoe is in a right spiral shape.
5. A slip-type casing tieback as claimed in claim 1, wherein: the male buckle end of the upper joint is provided with two first O-shaped sealing rings, the male buckle end of the extension cylinder is provided with two second O-shaped sealing rings, and the outer side of the control ring is provided with two third O-shaped sealing rings.
6. A slip-type casing tieback as claimed in claim 1, wherein: the number of the sealing rings, the corresponding sealing ring mounting grooves and the convex rings on the outer wall of the protective sleeve is more than or equal to 2.
7. A slip-type casing tieback as claimed in claim 1, wherein: the cross section of the sealing ring is in a shape of Chinese character shan.
8. A slip-type casing tieback as claimed in claim 1, wherein: 8 slots are equidistantly arranged on the wall of the slip around the circumference, wherein 1 slot is a through slot, the rest 7 slots are non-through slots started from the upper end, and a small hole is formed at the tail end of each slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020922359.5U CN212642634U (en) | 2020-05-27 | 2020-05-27 | Slip type casing tie-back device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020922359.5U CN212642634U (en) | 2020-05-27 | 2020-05-27 | Slip type casing tie-back device |
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| Publication Number | Publication Date |
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| CN212642634U true CN212642634U (en) | 2021-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020922359.5U Active CN212642634U (en) | 2020-05-27 | 2020-05-27 | Slip type casing tie-back device |
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| CN (1) | CN212642634U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718501A (en) * | 2022-03-31 | 2022-07-08 | 中海油能源发展股份有限公司 | Quick casing tie-back sealing device and operation method thereof |
-
2020
- 2020-05-27 CN CN202020922359.5U patent/CN212642634U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718501A (en) * | 2022-03-31 | 2022-07-08 | 中海油能源发展股份有限公司 | Quick casing tie-back sealing device and operation method thereof |
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