CN219887997U - Petroleum pipe threaded joint - Google Patents
Petroleum pipe threaded joint Download PDFInfo
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- CN219887997U CN219887997U CN202321548026.0U CN202321548026U CN219887997U CN 219887997 U CN219887997 U CN 219887997U CN 202321548026 U CN202321548026 U CN 202321548026U CN 219887997 U CN219887997 U CN 219887997U
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- threaded joint
- petroleum pipe
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- 239000003208 petroleum Substances 0.000 title claims abstract description 63
- 238000007789 sealing Methods 0.000 claims abstract description 59
- 230000007423 decrease Effects 0.000 claims description 14
- 210000003781 tooth socket Anatomy 0.000 claims 2
- 230000006835 compression Effects 0.000 abstract description 17
- 238000007906 compression Methods 0.000 abstract description 17
- 210000002445 nipple Anatomy 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model provides a petroleum pipe threaded joint. The petroleum pipe nipple includes: an external threaded joint; the internal thread joint is in threaded connection with the external thread joint, a first thread part a, a sealing part b and a second thread part c are sequentially formed between the external thread joint and the internal thread joint from the outer side to the inner side along the axial direction of the petroleum pipe thread joint, the external thread joint is sequentially provided with a first external thread, an external sealing surface and a second external thread from the outer side to the inner side, and the internal thread joint is sequentially provided with a first internal thread, an internal sealing surface and a second internal thread from the outer side to the inner side; the first external thread and the first internal thread are in threaded fit to form a first threaded part a, the second external thread and the second internal thread are in threaded fit to form a second threaded part c, and the first external thread, the second external thread, the first internal thread and the second internal thread are all variable-tooth-width threads. The petroleum pipe threaded joint provided by the technical scheme of the utility model has better torsion resistance, compression resistance and sealing performance, and higher screwing positioning precision.
Description
Technical Field
The utility model relates to the technical field of petroleum pipe engineering, in particular to a petroleum pipe threaded joint.
Background
The petroleum pipe threaded joint is required to be applied to working conditions such as a horizontal well and an inclined well, and comprises an internal threaded joint and an external threaded joint which are screwed together to realize connection.
At present, in a petroleum pipe threaded joint (Chinese patent CN 205558826U) known by the inventor, the petroleum pipe threaded joint adopts one-stage variable-tooth-width wedge threads, namely, only one section of variable-tooth-width threads are arranged between an internal threaded joint and an external threaded joint, a sealing structure is not arranged, and the problems of low screwing positioning precision and poor air sealing performance are easy to occur.
Disclosure of Invention
The utility model mainly aims to provide a petroleum pipe threaded joint, which solves the problems of poor torsion resistance, compression resistance and sealing performance, and low screwing positioning precision and poor air sealing performance caused by the fact that only one section of variable tooth width thread is arranged on the petroleum pipe threaded joint in the prior art.
In order to achieve the above object, the present utility model provides a petroleum pipe threaded joint comprising: an external threaded joint; the internal thread joint is in threaded connection with the external thread joint, and a first thread part a, a sealing part b and a second thread part c are sequentially formed between the external thread joint and the internal thread joint from the outer side to the inner side along the axial direction of the petroleum pipe thread joint; the external threaded joint is sequentially provided with a first external thread, an external sealing surface and a second external thread from the outer side to the inner side along the axial direction of the petroleum pipe threaded joint, and the internal threaded joint is sequentially provided with a first internal thread, an internal sealing surface and a second internal thread from the outer side to the inner side along the axial direction of the petroleum pipe threaded joint; the first external thread and the first internal thread are matched to form a first thread part a, the second external thread and the second internal thread are matched to form a second thread part c, and the first external thread, the second external thread, the first internal thread and the second internal thread are all variable-tooth-width threads.
Further, from the outer side to the inner side, the tooth widths of the first external thread gradually decrease according to an arithmetic progression, and the tooth slot widths of the first internal thread gradually decrease according to the arithmetic progression; the tooth widths of the second external threads gradually decrease from the outer side to the inner side according to the arithmetic progression, and the tooth slot widths of the second internal threads gradually decrease according to the arithmetic progression.
Further, the tolerance d of the plurality of tooth widths of the first external thread and the tolerance e of the plurality of tooth widths of the second external thread have the following relationship: d > e.
Further, the tolerance d ranges from 0.2mm to 0.5mm; and/or the tolerance e ranges from 0.15mm to 0.45mm.
Further, the pitch p1 of the first external thread is equal to the pitch p2 of the second external thread.
Further, the pitch p1 and the pitch p2 are each in the range of 6.35mm to 10.16mm.
Further, the outer sealing surface and the inner sealing surface are both tapered surfaces.
Further, the taper ranges of the inner sealing surface and the outer sealing surface are 1:2 to 1:5.
further, the petroleum pipe threaded joint further comprises an inner shoulder structure, wherein the inner shoulder structure comprises a first inner shoulder surface arranged on the inner end surface of the external threaded joint and a second inner shoulder surface arranged on the inner end surface of the internal threaded joint, and the first inner shoulder surface and the second inner shoulder surface are matched.
Further, the petroleum pipe threaded joint further comprises an outer shoulder structure, the outer shoulder structure comprises a first outer shoulder surface arranged on the outer end face of the outer threaded joint and a second outer shoulder surface arranged on the outer end face of the inner threaded joint, and the first outer shoulder surface and the second outer shoulder surface are matched.
By applying the technical scheme of the utility model, two sections of variable-tooth-width thread sections (namely the first thread part a and the second thread part c) are arranged between the internal thread joint and the external thread joint, and the variable-tooth-width thread can bear the functions of compression resistance and torsion resistance in the screwing process. Set up sealing portion b between two sections variable tooth width screw thread sections, need not to additionally set up the circular bead and realize sealedly, compare in the tip that prior art was in female screw joint and external screw thread connects and set up sealed scheme, on the one hand, set up the sealing in intermediate position and have better sealing performance, on the other hand, can avoid sealing performance between female screw joint and the external screw thread to receive the influence of tip circular bead contact atress to improve petroleum pipe screw thread connects's sealing performance. Therefore, the petroleum pipe threaded joint has higher torsion resistance, compression resistance and sealing performance, still has good structural integrity and sealing integrity under various complex severe load working conditions, and can be suitable for oil and gas wells with higher requirements on torsion resistance and compression resistance, such as inclined wells, horizontal wells and the like.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 shows a schematic structural view of an embodiment of a petroleum pipe threaded joint according to the present utility model;
FIG. 2 shows an exploded view of the petroleum pipe threaded joint of FIG. 1;
fig. 3 shows a schematic view of the structure at the first thread part a of the petroleum pipe threaded joint of fig. 1;
fig. 4 shows an exploded view at the first threaded portion a of fig. 3;
FIG. 5 shows a schematic view of the structure at the seal b of the petroleum pipe nipple of FIG. 1;
fig. 6 shows a schematic view of the structure at the second threaded portion c of the petroleum pipe threaded joint of fig. 1;
fig. 7 shows an exploded view at the second threaded portion c of fig. 6;
FIG. 8 shows a schematic view of another embodiment of the petroleum pipe threaded joint of FIG. 1; and
fig. 9 shows a schematic structural view of another embodiment of the petroleum pipe nipple of fig. 1.
Wherein the above figures include the following reference numerals:
1. an external threaded joint; 11. a first external thread; 12. an outer sealing surface; 13. a second external thread; 2. an internally threaded joint; 21. a first internal thread; 22. an inner sealing surface; 23. a second internal thread; 3. an internal shoulder structure; 31. a first inner shoulder surface; 32. a second inner shoulder surface; 4. an outer shoulder structure; 41. a first outer shoulder surface; 42. a second outer shoulder surface.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 and 2, an embodiment of the present utility model provides a petroleum pipe threaded joint. The petroleum pipe nipple includes: an externally threaded joint 1; the internal thread joint 2 is in threaded connection with the external thread joint 1, and a first thread part a, a sealing part b and a second thread part c are sequentially formed between the external thread joint 1 and the internal thread joint 2 from the outside to the inside along the axial direction of the petroleum pipe thread joint; the external threaded joint 1 is provided with a first external thread 11, an external sealing surface 12 and a second external thread 13 in sequence from the outside to the inside along the axial direction of the petroleum pipe threaded joint, and the internal threaded joint 2 is provided with a first internal thread 21, an internal sealing surface 22 and a second internal thread 23 in sequence from the outside to the inside along the axial direction of the petroleum pipe threaded joint; the first external thread 11 and the first internal thread 21 are in threaded fit to form a first threaded portion a, the second external thread 13 and the second internal thread 23 are in threaded fit to form a second threaded portion c, and the first external thread 11, the second external thread 13, the first internal thread 21 and the second internal thread 23 are all variable-tooth-width threads.
The male screw joint 1 and the female screw joint 2 are screwed together to achieve connection, that is, the female screw joint 2 is coated on the outer periphery of a part of the male screw joint 1 in the radial direction, so that the left side is the "outer side" and the right side is the "inner side" in the axial direction of the petroleum pipe screw joint as shown in fig. 1.
Through the arrangement, two sections of variable-tooth-width thread sections (namely the first thread part a and the second thread part c) are arranged between the internal thread connector 2 and the external thread connector 1, and in the screwing process, the variable-tooth-width thread can bear the functions of compression resistance and torsion resistance. The sealing part b is arranged between the two sections of variable tooth width thread sections, and a shoulder is not required to be additionally arranged for sealing, so that compared with the scheme that the sealing is arranged at the end parts of the internal thread connector 2 and the external thread connector 1 in the prior art, on one hand, the sealing is arranged at the middle position, so that the sealing performance between the internal thread connector 2 and the external thread connector 1 can be prevented from being influenced by the contact stress of the shoulder at the end parts, and the sealing performance of the petroleum pipe thread connector is improved. Therefore, the petroleum pipe threaded joint has higher torsion resistance, compression resistance and sealing performance, still has good structural integrity and sealing integrity under various complex severe load working conditions, and can be suitable for oil and gas wells with higher requirements on torsion resistance and compression resistance, such as inclined wells, horizontal wells and the like.
As shown in fig. 3, 4, 6 and 7, in the embodiment of the present utility model, the tooth widths of the first external thread 11 gradually decrease from the outside to the inside in an arithmetic progression, and the tooth slot widths of the first internal thread 21 gradually decrease in an arithmetic progression; the plurality of tooth widths of the second external thread 13 gradually decrease in an arithmetic progression from the outside to the inside, and the plurality of tooth groove widths of the second internal thread 23 gradually decrease in an arithmetic progression.
In the above technical solution, as shown in fig. 4, the tooth space width in the middle of three tooth spaces of the first internal thread 21 shown in the drawing is w21, the tooth space width in the outer side is w21+d, the tooth space width in the inner side is w21-d, that is, the tooth space width of the first internal thread 21 gradually decreases from the outer side to the inner side according to an arithmetic progression, and the tolerance is d, the tooth space width in the middle of three teeth of the first external thread 11 shown in the drawing is w11 (because the first internal thread 21 is in threaded engagement with the first external thread 11, the value of w21 is the same as that of w 11), the tooth space width in the outer side is w11+d, the tooth space width in the inner side is w11-d, that is, from the outer side to the inner side, the tooth space width of the first external thread gradually decreases according to the arithmetic progression, and the tolerance is d. As shown in fig. 5, the tooth space width in the middle of the three tooth spaces of the second internal thread 23 shown in the drawing is w22, the tooth space width in the outer side is w22+e, the tooth space width in the inner side is w22-e, that is, from the outer side to the inner side, the tooth space width of the second internal thread 23 gradually decreases in an arithmetic progression, and the tolerance is e, the tooth space width in the middle of the three teeth of the second external thread 13 shown in the drawing is w12 (since the second internal thread 23 is in threaded engagement with the second external thread 13, the value of w22 is the same as that of w 12), the tooth space width in the outer side is w12+e, the tooth space width in the inner side is w12-e, that is, from the outer side to the inner side, and the tooth space width of the second external thread gradually decreases in an arithmetic progression, and the tolerance is e. The tolerance d of the plurality of tooth widths of the first external thread 11 and the tolerance e of the plurality of tooth widths of the second external thread 13 have the following relationship: d > e.
Through the arrangement, in the process of screwing the internal threaded joint 2 and the external threaded joint 1, the meshing interference speed of the first threaded part a with larger tolerance is larger than that of the second threaded part c with smaller tolerance, so that the first threaded part a plays a role in screwing and positioning; and when the screwing is about to be completed, the screwing torque between the internal thread joint 2 and the external thread joint 1 is rapidly increased, which is equivalent to the positioning function in the shoulder screwing process, so that the screwing positioning effect between the internal thread joint 2 and the external thread joint 1 is better. The first threaded part a can play a role in connection, torsion resistance and screwing and positioning without additionally arranging a shoulder structure.
In one embodiment of the utility model, the tolerance d ranges from 0.2mm to 0.5mm and the tolerance e ranges from 0.15mm to 0.45mm.
As shown in fig. 4 and 7, in the embodiment of the present utility model, the pitch p1 of the first external thread 11 is equal to the pitch p2 of the second external thread 13. The pitch of the first female screw 21 is p1 and the pitch of the second female screw 23 is p2.
In one embodiment of the utility model, both pitch p1 and pitch p2 range from 6.35mm to 10.16mm.
In the embodiment of the utility model, as shown in fig. 5, the outer sealing surface 12 and the inner sealing surface 22 are both tapered surfaces.
Through the arrangement, the sealing part b is positioned between the first thread part a and the second thread part c, so that the influence of the shoulder type threaded joint in the prior art on the sealing performance can be eliminated, and the sealing integrity and the sealing robustness of the threaded joint are improved.
In one embodiment of the utility model, the taper s of the inner sealing surface 22 and the outer sealing surface 12 are each in the range 1:2 to 1:5.
as shown in fig. 8, in one embodiment of the present utility model, the petroleum pipe threaded joint further includes an internal shoulder structure 3, the internal shoulder structure 3 including a first internal shoulder surface 31 provided on an internal end surface of the externally threaded joint 1 and a second internal shoulder surface 32 provided on an internal end surface of the internally threaded joint 2, the first internal shoulder surface 31 and the second internal shoulder surface 32 being surface-engaged. By arranging the inner shoulder structure 3, the compression resistance, torsion resistance and other performances of the petroleum pipe threaded joint can be further improved.
As shown in fig. 9, in the embodiment of the present utility model, the petroleum pipe thread joint further includes an external shoulder structure 4, the external shoulder structure 4 includes a first external shoulder surface 41 provided on an external end surface of the external thread joint 1, and a second external shoulder surface 42 provided on an external end surface of the internal thread joint 2, and the first external shoulder surface 41 and the second external shoulder surface 42 are surface-engaged. By arranging the outer shoulder structure 4, the compression resistance, torsion resistance and other performances of the petroleum pipe threaded joint can be further improved.
In an application example of the utility model, the petroleum pipe threaded joint adopts a pipe body with the specification of phi 177.80mm multiplied by 10.36mm, the steel grade is P110, the external diameter of the coupling is regulated by adopting an API standard, and the material performance meets the API standard requirement. The geometric parameters of the petroleum pipe threaded joint are as follows: the first thread part a is a variable tooth width thread, the pitch p1=8.47, the thread taper is 1:16, the adjacent tooth widths meet the arrangement of an arithmetic progression, and the tolerance d is 0.35mm; the second thread part c is a variable tooth width thread, the pitch p2=8.47, the thread taper is 1:16, the adjacent tooth widths meet the arrangement of an arithmetic progression, and the tolerance e is 0.20mm; the sealing part b is positioned between the first thread part a and the second thread part c, and the taper s is 1:3. The petroleum pipe threaded joint has the connection strength reaching 4132kN, the compression strength reaching 4132kN, the yield torque reaching more than 45000N.m, the air tightness reaching more than 77Mpa, the external pressure resistance reaching more than 59Mpa, the bending resistance reaching more than 20 DEG/30 m, and the requirement of 3 times of screwing-off and unhooking. Has excellent compression resistance, torsion resistance and sealing performance.
In another application example of the utility model, the petroleum pipe threaded joint adopts the specification of a pipe body of phi 88.9mm multiplied by 9.52mm, the steel grade is P110, the external diameter of the coupling is regulated by adopting the API standard, and the material performance meets the API standard requirement. The geometric parameters of the petroleum pipe threaded joint are as follows: the first thread part a is a variable tooth width thread, the pitch p1=6.35, the thread taper is 1:16, the adjacent tooth widths meet the arrangement of an arithmetic progression, and the tolerance d is 0.25mm; the second thread part c is a variable tooth width thread, the pitch p2=6.35, the thread taper is 1:16, the adjacent tooth widths meet the arrangement of an arithmetic progression, and the tolerance e is 0.15mm; the sealing part b is positioned between the first thread part a and the second thread part c, and the taper s is 1:4. The petroleum pipe threaded joint has the connection strength reaching 1800kN, the compression strength reaching 1800kN, the yield torque reaching 23000N.m, the air tightness reaching 142Mpa or more, the external pressure resistance reaching 145Mpa or more, the bending resistance reaching 45 DEG/30 m or more, and meets the requirement of 10 times of break-out and no sticking buckle. Has excellent compression resistance, torsion resistance and sealing performance.
From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: the two sections of variable tooth width thread sections are arranged between the internal thread connector and the external thread connector, so that the variable tooth width thread section has better compression resistance, torsion resistance and the like, the meshing interference speed of the first thread part a with larger tolerance is larger than that of the second thread part c with smaller tolerance in the screwing process, the screwing torque between the internal thread connector and the external thread connector is rapidly increased when screwing is about to be completed, the screwing positioning effect is better, and the positioning precision is higher. The sealing part b is arranged between the two sections of variable tooth width thread sections, and the sealing is arranged at the middle position, so that the sealing performance of the petroleum pipe threaded joint is improved. Therefore, the petroleum pipe threaded joint has higher torsion resistance, compression resistance and sealing performance, still has good structural integrity and sealing integrity under various complex severe load working conditions, and can be suitable for oil and gas wells with higher requirements on torsion resistance and compression resistance, such as inclined wells, horizontal wells and the like.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A petroleum pipe threaded joint, comprising:
an externally threaded joint (1);
an internal thread joint (2) which is in threaded connection with the external thread joint (1), wherein a first thread part (a), a sealing part (b) and a second thread part (c) are sequentially formed between the external thread joint (1) and the internal thread joint (2) from the outside to the inside along the axial direction of the petroleum pipe thread joint;
along the axial direction of the petroleum pipe threaded joint, a first external thread (11), an external sealing surface (12) and a second external thread (13) are sequentially formed in the external threaded joint (1) from the outer side to the inner side, and a first internal thread (21), an internal sealing surface (22) and a second internal thread (23) are sequentially formed in the internal threaded joint (2) from the outer side to the inner side along the axial direction of the petroleum pipe threaded joint;
the first external thread (11) and the first internal thread (21) are in threaded fit to form the first threaded portion (a), the second external thread (13) and the second internal thread (23) are in threaded fit to form the second threaded portion (c), and the first external thread (11), the second external thread (13), the first internal thread (21) and the second internal thread (23) are all variable-tooth-width threads.
2. A petroleum pipe threaded joint according to claim 1, wherein the plurality of tooth widths of the first external thread (11) decrease gradually in an arithmetic progression from the outside to the inside, and the plurality of tooth socket widths of the first internal thread (21) decrease gradually in an arithmetic progression; the tooth widths of the second external threads (13) are gradually reduced from the outside to the inside according to an arithmetic progression, and the tooth socket widths of the second internal threads (23) are gradually reduced according to the arithmetic progression.
3. A petroleum pipe threaded joint according to claim 2, characterized in that the tolerance d of the plurality of tooth widths of the first external thread (11) has the following relationship with the tolerance e of the plurality of tooth widths of the second external thread (13): d > e.
4. A petroleum pipe threaded joint according to claim 3, wherein the tolerance d ranges from 0.2mm to 0.5mm; and/or said tolerance e ranges from 0.15mm to 0.45mm.
5. A petroleum pipe threaded joint according to any of claims 1 to 4, characterized in that the pitch p1 of the first external thread (11) is equal to the pitch p2 of the second external thread (13).
6. A petroleum pipe threaded joint according to claim 5, wherein the pitch p1 and the pitch p2 are each in the range 6.35mm to 10.16mm.
7. A petroleum pipe threaded joint according to any of claims 1 to 4, characterized in that the outer sealing surface (12) and the inner sealing surface (22) are both conical surfaces.
8. A petroleum pipe threaded joint according to claim 7, characterized in that the taper ranges of the inner sealing surface (22) and the outer sealing surface (12) are each 1:2 to 1:5.
9. a petroleum pipe threaded joint according to any one of claims 1 to 4, characterized in that the petroleum pipe threaded joint further comprises an internal shoulder structure (3), the internal shoulder structure (3) comprising a first internal shoulder surface (31) provided at an internal end surface of the external threaded joint (1) and a second internal shoulder surface (32) provided at an internal end surface of the internal threaded joint (2), the first internal shoulder surface (31) and the second internal shoulder surface (32) being surface-engaged.
10. A petroleum pipe threaded joint according to any one of claims 1 to 4, characterized in that the petroleum pipe threaded joint further comprises an external shoulder structure (4), the external shoulder structure (4) comprising a first external shoulder surface (41) provided at an external end surface of the external threaded joint (1), and a second external shoulder surface (42) provided at an external end surface of the internal threaded joint (2), the first external shoulder surface (41) and the second external shoulder surface (42) being surface-engaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321548026.0U CN219887997U (en) | 2023-06-16 | 2023-06-16 | Petroleum pipe threaded joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321548026.0U CN219887997U (en) | 2023-06-16 | 2023-06-16 | Petroleum pipe threaded joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219887997U true CN219887997U (en) | 2023-10-24 |
Family
ID=88407316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321548026.0U Active CN219887997U (en) | 2023-06-16 | 2023-06-16 | Petroleum pipe threaded joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219887997U (en) |
-
2023
- 2023-06-16 CN CN202321548026.0U patent/CN219887997U/en active Active
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