CN218117710U - High-performance threaded joint for quick connecting sleeve - Google Patents
High-performance threaded joint for quick connecting sleeve Download PDFInfo
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- CN218117710U CN218117710U CN202221853319.5U CN202221853319U CN218117710U CN 218117710 U CN218117710 U CN 218117710U CN 202221853319 U CN202221853319 U CN 202221853319U CN 218117710 U CN218117710 U CN 218117710U
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Abstract
The utility model discloses a high-performance quick connecting sleeve threaded joint, which comprises a coupling of the threaded joint and a tubular column of a connecting sleeve, wherein the coupling is connected with the tubular column through a thread tooth, the initial end of the thread tooth of the tubular column is provided with a pipe end chamfer, and the tail end of the thread tooth of the coupling is provided with a thread grease groove which forms an annular space with the pipe end chamfer; the end part of the pipe column is matched with the inner end of the coupling to form a shoulder matching surface, the included angle between the shoulder matching surface and the vertical direction is 15 degrees, and the inclination direction of the shoulder matching surface is opposite to the screwing direction of the pipe column; the thread guide surface of the thread tooth is 20 degrees, the included angle between the thread bearing surface of the thread tooth and the vertical direction is 5 degrees, and the inclination direction of the thread bearing surface is opposite to the screwing direction of the pipe column. The utility model aims at providing a in ocean oil gas development exploitation in-process, can the high-speed joint can guarantee again that airtight performance is connected.
Description
Technical Field
The utility model relates to a well drilling quick-operation joint technical field especially relates to a high performance quick connection sleeve screwed joint.
Background
Compared with land drilling, the marine drilling cost is high and is 3 to 10 times higher than that of land drilling, the offshore drilling cost is less in straight wells and more in inclined wells, and particularly in recent years, the exploitation of marine petroleum deep wells and ultra-deep wells must ensure that casing connection is quickly buckled and quickly buckled, and the casing connection has the performances of high tensile strength, high torsion resistance, high extrusion resistance, thread gluing resistance, sealing enhancement and the like, so that the casing running procedure in the drilling process is quickly, safely and efficiently carried out, and the safety and the integrity of a casing well column are ensured.
The existing quick connection performance is only embodied in large thread pitch, multi-thread threads and the like, and more problems of field operation are slow screwing speed caused by screwing in, screwing oppositely, wrong screwing and the like of a threaded joint. Aiming at oil-gas mixed wells such as deep wells, ultra-deep wells, inclined wells, large-displacement horizontal wells and the like, the currently used quick threaded casing joint sacrifices the air sealing performance in bending, stretching and extruding states in pursuit of rapidness. Therefore, a threaded joint which can be quickly connected and can ensure the air sealing performance in the marine oil and gas development and exploitation process is needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome not enough among the above-mentioned prior art, aim at providing one kind at ocean oil gas development exploitation in-process, can the high-speed joint can guarantee again that airtight performance is sealed.
In order to achieve the purpose, the utility model is realized by the following technical proposal:
a high-performance quick connection sleeve threaded joint comprises a coupling of the threaded joint and a tubular column for connecting a sleeve, wherein the coupling is connected with the tubular column through thread teeth, a pipe end chamfer is arranged at the initial end of the thread teeth of the tubular column, and a thread grease groove which forms an annular space with the pipe end chamfer is arranged at the tail end of the thread teeth of the coupling; the end part of the pipe column is matched with the inner end of the coupling to form a shoulder matching surface, the included angle between the shoulder matching surface and the vertical direction is 15 degrees, and the inclination direction of the shoulder matching surface is opposite to the screwing direction of the pipe column; the thread guide surface of the thread tooth is 20 degrees, the included angle between the thread bearing surface of the thread tooth and the vertical direction is 5 degrees, and the inclination direction of the thread bearing surface is opposite to the screwing direction of the pipe column.
Furthermore, a guide surface chamfer with an included angle of 30 degrees with the vertical direction is arranged at the corner of the thread guide surface.
Furthermore, the initial end of the thread tooth of the coupling is provided with a chamfer angle of the end part of the coupling, which forms an included angle of 65 degrees with the horizontal direction.
Further, the fit clearance of the thread guide surface between the coupling and the pipe column is 0.04-0.16mm.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses do benefit to the high-speed joint to keep gas sealing performance. The chamfer angle of the pipe end of the coupling is expanded to 65 degrees, and the chamfer angle of the pipe end matched with the thread grease groove can avoid interference with thread teeth in the screwing-in process. The bearing surface of the thread is 5 degrees, the matching surface of the shoulder is 15 degrees, and the two contact surfaces can form a wedge shape after being respectively contacted and matched, so that the reliability of metal sealing is ensured. Annular screw thread fat groove can fill screw thread fat, utilizes screw thread fat to fill screw thread fit clearance when the connection is detained to last, improves airtight effect.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the middle coupling of the present invention;
FIG. 3 is a schematic view of the structure of the middle tubular column of the present invention;
fig. 4 is a schematic view of the connection structure of the middle thread guide surface of the present invention.
Reference numerals:
1-coupling, 2-pipe column, 3-thread grease groove, 4-thread guide surface, 5-guide surface chamfer, 6-thread bearing surface, 7-coupling end chamfer, 8-metal sealing surface, 9-shoulder matching surface and 10-pipe end chamfer.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1 to 4, a high-performance quick connection sleeve threaded joint comprises a coupling 1 of the threaded joint and a tubular column 2 connected with a sleeve, wherein the coupling 1 is connected with the tubular column 2 through thread teeth, a pipe end chamfer 10 is arranged at the initial end of the thread teeth of the tubular column 2, and a thread grease groove 3 forming an annular space with the pipe end chamfer 10 is arranged at the tail end of the thread teeth of the coupling 1; a shoulder matching surface 9 is arranged at the end part of the pipe column 2 and the inner end of the coupling 1 in a matching manner, the included angle between the shoulder matching surface 9 and the vertical direction is 15 degrees, and the inclination direction of the shoulder matching surface 9 is opposite to the screwing direction of the pipe column 2; the thread guide surface 4 of the thread tooth is 20 degrees, the included angle between the thread bearing surface 6 of the thread tooth and the vertical direction is 5 degrees, and the inclination direction of the thread bearing surface 6 is opposite to the screwing direction of the pipe column 2.
Wherein, the corner of the thread guide surface 4 is provided with a guide surface chamfer 5 which forms an included angle of 30 degrees with the vertical direction. The thread guide surface 4 is inclined by 10 degrees from a conventional buttress shape to be increased to 20 degrees, meanwhile, the chamfer angle 5 of the guide surface is increased to 30 degrees, so that the box can be quickly and effectively screwed into the pin when the coupling 1 and the tubular column 2 are screwed in advance, and the possibility of wrong screwing and slow screwing is reduced.
Wherein, the initial end of the thread tooth of the coupling 1 is provided with a coupling end chamfer 7 which forms an included angle of 65 degrees with the horizontal direction. The coupling end chamfer 7 and the pipe end chamfer 10 are arranged in a way of avoiding the extending direction of the thread teeth, so that the interference with the thread teeth can be avoided in the screwing-in process.
Wherein the fit clearance of the thread guide surface 4 between the coupling 1 and the pipe column 2 is 0.04-0.16mm. The fit clearance of the API thread guide surface is 0.25-0.30mm, and the fit clearance of the thread guide surface 4 is smaller than that of the API thread guide surface, so that the interference magnitude change of the metal seal is small in the stretching and compressing states, the contact pressure change of the metal seal is small or enhanced, and the reliability of the metal seal is ensured.
The utility model discloses have the double-seal effect in metal seal and screw thread fat packing clearance, do benefit to the high-speed joint to keep airtight performance. The extension of the coupling pipe end chamfer 7 is 65 degrees, and the pipe end chamfer 10 matched with the thread grease groove 3 can avoid interference with thread teeth in the screwing-in process. The thread bearing surface 6 is 5 degrees, the shoulder matching surface 9 is 15 degrees, and the two contact surfaces can form a wedge shape after being respectively contacted and matched, so that the contact pressure of the joint keeping sealing in a compressed and bent state is enhanced, and the reliability of metal sealing is ensured. The thread bearing surface 6 with the inclination angle, the shoulder matching surface 9 and the thread guide surface 4 can be in metal sealing in a conical surface after being connected, and the sealing effect is improved through interference fit.
As shown in fig. 4, the thread guide surfaces 4 have a gap portion after fitting contact, and the thread grease in the annular thread grease groove 3 can fill the gap between the thread guide surfaces 4, so that the thread fitting gap is filled with the thread grease at the time of make-up connection, and the air-tight sealing effect is improved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a high performance quick connection casing threaded joint, includes threaded joint's collar (1) and adapter sleeve's tubular column (2), its characterized in that: the coupling (1) is connected with the pipe column (2) through a thread tooth, a pipe end chamfer (10) is arranged at the initial end of the thread tooth of the pipe column (2), and a thread grease groove (3) forming an annular space with the pipe end chamfer (10) is arranged at the tail end of the thread tooth of the coupling (1); a shoulder matching surface (9) is arranged at the end part of the pipe column (2) and the inner end of the coupling (1) in a matching manner, an included angle between the shoulder matching surface (9) and the vertical direction is 15 degrees, and the inclination direction of the shoulder matching surface (9) is opposite to the screwing direction of the pipe column (2); the thread guide surface (4) of the thread tooth is 20 degrees, the included angle between the thread bearing surface (6) of the thread tooth and the vertical direction is 5 degrees, and the inclination direction of the thread bearing surface (6) is opposite to the screwing direction of the tubular column (2).
2. The high performance quick connect nipple thread joint of claim 1, wherein: and a guide surface chamfer (5) which forms an included angle of 30 degrees with the vertical direction is arranged at the corner of the thread guide surface (4).
3. The high performance quick connect nipple thread joint of claim 1, wherein: and the initial end of the thread tooth of the coupling (1) is provided with a coupling end chamfer (7) which forms an included angle of 65 degrees with the horizontal direction.
4. The high performance quick connect nipple threaded joint of claim 1, wherein: and the fit clearance of the thread guide surface (4) between the coupling (1) and the pipe column (2) is 0.04-0.16mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221853319.5U CN218117710U (en) | 2022-07-19 | 2022-07-19 | High-performance threaded joint for quick connecting sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221853319.5U CN218117710U (en) | 2022-07-19 | 2022-07-19 | High-performance threaded joint for quick connecting sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218117710U true CN218117710U (en) | 2022-12-23 |
Family
ID=84517161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221853319.5U Active CN218117710U (en) | 2022-07-19 | 2022-07-19 | High-performance threaded joint for quick connecting sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218117710U (en) |
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2022
- 2022-07-19 CN CN202221853319.5U patent/CN218117710U/en active Active
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