CN220726209U - Drilling casing pipe connecting structure - Google Patents
Drilling casing pipe connecting structure Download PDFInfo
- Publication number
- CN220726209U CN220726209U CN202420425932.XU CN202420425932U CN220726209U CN 220726209 U CN220726209 U CN 220726209U CN 202420425932 U CN202420425932 U CN 202420425932U CN 220726209 U CN220726209 U CN 220726209U
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- Prior art keywords
- pipe
- joint
- drilling
- limit stop
- joint pipe
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- 238000005553 drilling Methods 0.000 title claims abstract description 35
- 210000001503 joint Anatomy 0.000 claims abstract description 19
- 238000003032 molecular docking Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
Abstract
The utility model relates to the technical field of drilling equipment, in particular to a drilling casing connecting structure, which comprises the following components: two well casing pipes and a butt joint pipe group for connecting the two well casing pipes; the end part of the drilling sleeve is provided with an external spline structure and an external thread structure; the butt joint nest of tubes includes: a middle pipe and two joint pipes; two ends of the middle pipe are respectively connected to two drilling sleeves through two joint pipes; two ends of the middle pipe are respectively provided with two butt joint holes for inserting the end parts of the two drilling sleeves; the wall of the butt joint hole is provided with an internal spline structure which is used for forming spline connection with the external spline structure; the two ends of the intermediate pipe are respectively provided with an intermediate pipe limit stop; the joint pipe is arranged outside the whole formed by the drilling sleeve and the middle pipe; one end of the joint pipe is provided with an internal thread structure which is in threaded connection with the external thread structure; the other end of the joint pipe is provided with a joint pipe limit stop. The beneficial effects of the utility model are as follows: the installation is convenient, and the structure is reliable.
Description
Technical Field
The utility model relates to the technical field of drilling equipment, in particular to a drilling casing pipe connecting structure.
Background
The drill casing needs to be spliced during use to increase its length. Common connection modes refer to CN201120086454.7, an external thread male end is arranged at one end of a pipe body, an adjacent pipe body is provided with a thread female end matched with the external thread male end, and threaded connection is realized through relative rotation of two pipe bodies.
However, the length of the drill sleeve is usually several meters or even tens of meters, the weight is large, the difficulty of directly screwing two pipe bodies is relatively high, and the requirements on equipment and personnel are relatively high. Therefore, new connection structures are necessary to be researched, and the installation difficulty of the drilling casing is reduced.
Disclosure of Invention
The present utility model is directed to a well casing connection structure, which solves the above-mentioned problems.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
a well casing connection comprising: two well casing pipes and a butt joint pipe group for connecting the two well casing pipes;
the end part of the drilling sleeve is provided with an external spline structure and an external thread structure; the butt joint nest of tubes includes: a middle pipe and two joint pipes; two ends of the middle pipe are respectively connected to two drilling sleeves through two joint pipes; two ends of the middle pipe are respectively provided with two butt joint holes for inserting the end parts of the two drilling sleeves; the wall of the butt joint hole is provided with an internal spline structure which is used for forming spline connection with the external spline structure; the two ends of the intermediate pipe are respectively provided with an intermediate pipe limit stop; the joint pipe is arranged outside the whole formed by the drilling sleeve and the middle pipe; one end of the joint pipe is provided with an internal thread structure which is in threaded connection with the external thread structure; the other end of the joint pipe is provided with a joint pipe limit stop;
when the internal thread structure and the external thread structure are in threaded connection and locking, the joint pipe limit stop is abutted with the intermediate pipe limit stop, the external spline structure is abutted with the bottom of the butt joint hole, and the internal spline structure and the external spline structure form spline connection.
As a further scheme of the utility model: the contact surface of the external spline structure, which is abutted with the bottom of the butt joint hole, is axially positioned in the middle of the joint pipe limit stop.
As a further scheme of the utility model: the joint pipe limit stop is attached to the outer wall surface of the intermediate pipe.
As a further scheme of the utility model: the middle pipe is provided with a central hole which is communicated with the two butt joint holes; the diameter of the central hole is equal to the inner diameter of the drilling casing.
As a further scheme of the utility model: the joint pipe limit stop is arranged on the inner wall surface of the joint pipe; the intermediate pipe limit stop is arranged on the outer wall surface of the intermediate pipe.
As a further scheme of the utility model: the number of the joint pipe limit stops is the same as that of the intermediate pipe limit stops which are abutted against the joint pipe limit stops, and the joint pipe limit stops are a plurality of; the joint pipe limit stops and the intermediate pipe limit stops are uniformly distributed in the circumferential direction.
As a further scheme of the utility model: the number of the joint pipe limit stop and the number of the intermediate pipe limit stop which are abutted against the joint pipe limit stop are two.
As a further scheme of the utility model: the intermediate pipe limit stop is attached to the inner wall surface of the joint pipe.
Compared with the prior art, the utility model has the beneficial effects that: the installation is convenient, and the structure is reliable.
Other features and advantages of the present utility model will be disclosed in the following detailed description of the utility model and the accompanying drawings.
Drawings
FIG. 1 is a schematic illustration of a well casing connection of the present utility model;
FIG. 2 is an enlarged view of a portion of the well casing connection of FIG. 1 at A;
FIG. 3 is a cross-sectional view of one of the well casing connection structures of FIG. 1 taken along line B-B;
FIG. 4 is a schematic cross-sectional view of the intermediate tube of the structure of FIG. 3;
FIG. 5 is a schematic cross-sectional view of the well casing of the structure of FIG. 3;
FIG. 6 is a cross-sectional view of one of the well casing connection structures of FIG. 1 taken along line C-C.
List of reference numerals: drilling casing connection 100, drilling casing 10, external spline 11, external thread 12, butt tubing 20, intermediate tubing 21, internal spline 211, intermediate tubing limit stop 212, central bore 213, joint tubing 22, internal thread 221, joint tubing limit stop 222.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 6, in an embodiment of the present utility model, a well casing connection structure 100 includes: a butt tubing set 20 and two well casings 10.
The docking tube group 20 is used to connect two drilling sleeves 10. The end of the well casing 10 is provided with an external spline formation 11 and an external thread formation 12.
The docking tube group 20 includes: an intermediate pipe 21 and two joint pipes 22. The intermediate pipe 21 is connected at both ends to the two drilling casings 10 by two joint pipes 22, respectively.
Two butt holes into which the ends of the two drilling casings 10 are inserted are formed at both ends of the intermediate pipe 21, respectively. The wall of the butt joint hole is provided with an internal spline structure 211 which is used for forming spline connection with the external spline structure 11. The intermediate pipe 21 is formed with a butt hole at both ends thereof. Each mating hole forms an internal spline structure 211. Each mating hole is for insertion of an end of a drill casing 10. Intermediate pipe limit stops 212 are also formed at both ends of the intermediate pipe 21, respectively.
The joint pipe 22 is provided outside the whole of the drill casing 10 and the intermediate pipe 21. One end of the joint pipe 22 is formed with an internal thread structure 221 which constitutes a threaded connection with the external thread structure 12. The other end of the joint pipe 22 is formed with a joint pipe limit stopper 222.
When the internal thread structure 221 and the external thread structure 12 are in threaded connection and locking, the joint pipe limit stop 222 and the intermediate pipe limit stop 212 are abutted, the external spline structure 11 is abutted with the hole bottom of the butt joint hole, and the internal spline structure 211 and the external spline structure 11 form spline connection.
Torque transmission between the drilling sleeve 10 and the intermediate pipe 21 is achieved by the cooperation of the internal spline structure 211 and the external spline structure 11. While the mating of the internal thread formation 221 and the external thread formation 12 and the mating of the joint pipe limit stop 222 and the intermediate pipe limit stop 212 achieve an axial locking of the well casing 10 with the intermediate pipe 21.
As a specific embodiment, the contact surface of the external spline structure 11 abutting against the bottom of the abutment hole is located axially in the middle of the joint pipe limit stop 222. The joint pipe limit stopper 222 is attached to the outer wall surface of the intermediate pipe 21. The provision of the structure makes it possible to reinforce the structural strength at the hole bottom contact surface with the joint pipe limit stopper 222. The reliability of the whole structure is improved.
The intermediate pipe 21 is formed with a center hole 213 communicating the two butt holes. The diameter of the central bore 213 is equal to the inner diameter of the drill casing 10. As a specific embodiment, the intermediate pipe limit stopper 212 is attached to the inner wall surface of the joint pipe 22.
As a specific embodiment, the joint pipe limit stopper 222 is provided on the inner wall surface of the joint pipe 22. The intermediate pipe limit stopper 212 is provided on the outer wall surface of the intermediate pipe 21.
In a specific embodiment, the number of the joint pipe stopper 222 and the number of the intermediate pipe stopper 212 that are in contact with each other are the same. The plurality of joint pipe limit stops 222 and the plurality of intermediate pipe limit stops 212 are all arranged uniformly in the circumferential direction. Specifically, the number of the joint pipe limit stops 222 and the number of the intermediate pipe limit stops 212 that abut against the joint pipe limit stops are two.
During assembly, the joint pipe 22 can be sleeved outside the intermediate pipe 21 by staggering the joint pipe limit stop 222 and the intermediate pipe limit stop 212, aligning the spline connection structure, and plugging the drilling casing 10 and the intermediate pipe 21. The swivel joint pipe 22 locks the well casing 10 and the intermediate pipe 21 in the axial direction by means of the connection of the external thread structure 12 and the internal thread structure 221, locking the whole well casing connection structure 100 as one piece.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (8)
1. A well casing connection comprising: two well casing and a butt joint pipe group for connecting the two well casing;
an external spline structure and an external thread structure are arranged at the end part of the drilling sleeve; the docking tube group includes: a middle pipe and two joint pipes; the two ends of the middle pipe are respectively connected to the two drilling sleeves through the two joint pipes; two ends of the middle pipe are respectively provided with two butt joint holes for inserting the end parts of the two drilling sleeves; the hole wall of the butt joint hole is provided with an internal spline structure which is used for forming spline connection with the external spline structure; intermediate pipe limit stops are respectively formed at two ends of the intermediate pipe; the joint pipe is arranged outside the whole formed by the drilling sleeve and the intermediate pipe; one end of the joint pipe is provided with an internal thread structure which is in threaded connection with the external thread structure; a joint pipe limit stop is formed at the other end of the joint pipe;
when the internal thread structure is in threaded connection and locking with the external thread structure, the joint pipe limit stop is abutted with the intermediate pipe limit stop, the external spline structure is abutted with the bottom of the butt joint hole, and the internal spline structure and the external spline structure form spline connection.
2. A drilling casing connection according to claim 1, wherein,
and a contact surface of the external spline structure, which is abutted with the bottom of the butt joint hole, is axially positioned in the middle of the joint pipe limit stop.
3. A drilling casing connection according to claim 2, wherein,
and the joint pipe limit stop is attached to the outer wall surface of the middle pipe.
4. A drilling casing connection according to claim 1, wherein,
the middle pipe is provided with a central hole which is communicated with the two butt joint holes; the diameter of the central bore is equal to the inner diameter of the drilling casing.
5. A drilling casing connection according to claim 1, wherein,
the joint pipe limit stop is arranged on the inner wall surface of the joint pipe; the intermediate pipe limit stop is arranged on the outer wall surface of the intermediate pipe.
6. A drilling casing connection according to claim 5, wherein,
the number of the joint pipe limit stops is the same as that of the intermediate pipe limit stops which are abutted against the joint pipe limit stops, and the joint pipe limit stops are a plurality of; the joint pipe limit stops and the intermediate pipe limit stops are uniformly distributed in the circumferential direction.
7. A drilling casing connection according to claim 6, wherein,
the number of the joint pipe limit stop blocks and the number of the intermediate pipe limit stop blocks which are abutted against the joint pipe limit stop blocks are two.
8. A drilling casing connection according to claim 1, wherein,
and the intermediate pipe limit stop is attached to the inner wall surface of the joint pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420425932.XU CN220726209U (en) | 2024-03-06 | 2024-03-06 | Drilling casing pipe connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420425932.XU CN220726209U (en) | 2024-03-06 | 2024-03-06 | Drilling casing pipe connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220726209U true CN220726209U (en) | 2024-04-05 |
Family
ID=90484406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420425932.XU Active CN220726209U (en) | 2024-03-06 | 2024-03-06 | Drilling casing pipe connecting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220726209U (en) |
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2024
- 2024-03-06 CN CN202420425932.XU patent/CN220726209U/en active Active
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