CN216811593U - Semi-hermetic sealing heat-insulation oil pipe with special thread structure - Google Patents

Abstract

The utility model discloses a semi-hermetic sealing heat-insulating oil pipe with a special thread structure, which comprises a coupling and a pipe, wherein the coupling is sequentially provided with a first internal thread, a sealing gasket, an internal sealing shoulder, a second internal thread and an anti-falling thread hole from left to right; the pipe is provided with a first external thread, an anti-drop hole, a second external thread and an external sealing shoulder in sequence from left to right; the second internal thread is in threaded connection with the first external thread, and the inner sealing shoulder is in transition fit with the outer sealing shoulder; the socket head cap anticreep screw passes anticreep screw hole and lower extreme insert the anticreep is downthehole, socket head cap anticreep screw with anticreep screw hole threaded connection, socket head cap anticreep screw with anticreep hole interference fit connects. This application adopts mechanical type anticreep device, utilizes hexagon socket head cap anticreep screw fundamentally to solve the possibility of back-off, improves the joint strength of product greatly.

Description

Semi-hermetic sealing heat-insulation oil pipe with special thread structure

Technical Field

The utility model relates to the technical field of heat-insulating oil pipes of thermal production wells in the petroleum industry, is suitable for steam injection thermal production wells, and particularly relates to a semi-hermetic seal heat-insulating oil pipe with a special thread structure.

Background

In the development process of the petroleum industry, along with the development of the drilling and production operation of oil and gas wells to the conditions of larger well depth, larger well deviation, higher temperature, higher pressure and more severe working conditions and the progress of the process technology of the oil drilling and production, the heat insulation oil pipe adopted by the oil drill cannot meet the requirements of oil field development. The bending and twisting are large, so that the product is easy to trip, and the standard heat-insulating oil pipe cannot meet the working condition requirements of the current large well deviation and the large well depth, so that the exploitation operation efficiency is low. Therefore, various major insulating pipe manufacturers in the world are dedicated to the development of insulating oil pipes having high joint strength and superior sealing performance.

SUMMERY OF THE UTILITY MODEL

In order to solve the related technical problems, the application aims to provide a semi-hermetic special thread structure heat insulation oil pipe.

In order to achieve the purpose of the application, the technical scheme provided by the application is as follows:

a semi-hermetic sealing heat insulation oil pipe with a special thread structure comprises a coupling and a pipe, wherein the coupling is sequentially provided with a first internal thread, a sealing gasket, an internal sealing shoulder, a second internal thread and an anti-falling thread hole from left to right;

the pipe is provided with a first external thread, an anti-drop hole, a second external thread and an external sealing shoulder in sequence from left to right;

the second internal thread is in threaded connection with the first external thread, and the inner sealing shoulder is in transition fit with the outer sealing shoulder;

the socket head cap anticreep screw passes anticreep screw hole and lower extreme insert the anticreep is downthehole, socket head cap anticreep screw with anticreep screw hole threaded connection, socket head cap anticreep screw with anticreep hole interference fit connects.

The lower end positioning column of the inner hexagonal anti-falling screw is conical, the taper is 1:6, the inner end of the anti-falling hole is a conical part, and the lower end positioning column is inserted into the conical part and connected in an interference fit mode.

Wherein, the inner sealing shoulder and the outer sealing shoulder are both 90 degrees, and the matching amount is-0.05 mm- +0.05 mm.

Wherein the pipe specification outer diameter of the pipe is 114.3mm, and the coupling outer diameter of the coupling is 139.7 mm.

Wherein, the material of the sealing gasket is polytetrafluoroethylene, and the thickness of the sealing gasket is 3.175 mm.

Wherein, the inner diameter of the middle hole of the coupling is equal to the outer diameter of the coupling-25.4 mm.

Compared with the prior art, the utility model has the advantages that,

1. the anti-falling device adopts the mechanical anti-falling device, and the possibility of back-off is fundamentally solved by utilizing the inner hexagonal anti-falling screw, so that the connection strength of the product is greatly improved;

2. the torque shoulder is designed to greatly improve the composite load resistance, and the sealing performance is enhanced to a certain extent;

3. the torque shoulder is designed at a 90-degree right angle, so that the buckling and positioning are facilitated, the phenomena of wrong buckling and thread gluing are avoided, and the product quality and the working efficiency are effectively improved; in addition, the torque shoulder 90-degree right-angle design technology is mature and has good machinability, the labor time is saved, and the cost is also reduced; the quality control of large-scale production is guaranteed, and the popularization and development of products are facilitated;

in addition, the method is particularly suitable for working environments under complex well conditions such as deep wells, highly-deviated wells and the like, and is convenient to popularize and apply in industry.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the construction of the coupling of the present invention;

FIG. 3 is a schematic structural view of the tube of the present invention;

FIG. 4 is a schematic view of the anti-separation device of the present invention;

in the figure, 1-coupling, 2-coupling center hole, 3-anti-drop device, 4-pipe, 5-first internal thread, 6-sealing gasket, 7-internal sealing shoulder, 8-anti-drop thread hole, 9-first external thread, 10-anti-drop hole, 11-external sealing shoulder, 12-internal hexagonal anti-drop screw, 13-lower end positioning column, 14-second internal thread, 15-second external thread, D-center hole inner diameter, D-pipe specification outer diameter, M-coupling outer diameter and t-sealing gasket thickness.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The utility model is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when used in this specification the singular forms "a", "an" and/or "the" include "specify the presence of stated features, steps, operations, elements, or modules, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As used herein, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be understood that when an element is referred to herein as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1-4, the semi-hermetic sealing special thread structure heat insulation oil pipe provided in this embodiment includes a coupling 1 and a pipe 4, where the coupling 1 is provided with a first internal thread 5, a sealing gasket 6, an internal sealing shoulder 7, a second internal thread 14, and an anti-drop threaded hole 8 in sequence from left to right;

the pipe 4 is provided with a first external thread 9, an anti-drop hole 10, a second external thread 15 and an external sealing shoulder 11 in sequence from left to right;

the second internal thread 14 is in threaded connection with the first external thread 9, and the inner sealing shoulder 7 is in transition fit with the outer sealing shoulder 11;

socket head cap anticreep screw 12 passes anticreep screw hole 8 and lower extreme insert in the anticreep hole 10, socket head cap anticreep screw 12 with 8 threaded connection in anticreep screw hole, socket head cap anticreep screw 12 with 10 interference fit in anticreep hole connect.

The application provides a thermal-insulated oil pipe is leaving factory end with coupling and pipe connection, and when field end in-service use, use many thermal-insulated oil pipe end to end, a thermal-insulated oil pipe's first internal thread 5 and another thermal-insulated oil pipe's 15 threaded connection of second external thread set up sealed 6, the operation of being convenient for improves the leakproofness.

In a preferred embodiment, the lower end positioning column 13 of the socket head cap anti-disengaging screw 12 is conical and has a taper of 1:6, the inner end of the anti-disengaging hole 10 is a conical portion, and the lower end positioning column 13 is inserted into the conical portion and connected in an interference fit manner. Wherein, hexagon socket head cap anticreep screw can adopt following structure: the upper end is provided with screw threads, the outer circumference of the lower part is in a column shape with a smooth plane, and the lower end is a conical end.

In a preferred embodiment, the inner sealing shoulder 7 and the outer sealing shoulder are both 90 degrees, and the matching amount is-0.05 mm to +0.05 mm.

In a preferred embodiment, the pipe 4 has a pipe outside diameter D of 114.3mm, and the coupling 1 has a coupling outside diameter M of 139.7 mm.

In a preferred embodiment, the material of the gasket 6 is teflon, and the thickness t of the gasket is 3.175 mm.

In a preferred embodiment, the inner diameter d of the middle hole of the coupling is equal to the outer diameter M-25.4mm of the coupling.

The technical means not described in detail in the present application are known techniques.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (6)

1. The semi-hermetic sealing heat-insulating oil pipe with the special threaded structure is characterized by comprising a coupling (1) and a pipe (4), wherein the coupling (1) is sequentially provided with a first internal thread (5), a sealing gasket (6), an internal sealing shoulder (7), a second internal thread (14) and an anti-falling threaded hole (8) from left to right;

the pipe (4) is sequentially provided with a first external thread (9), an anti-falling hole (10), a second external thread (15) and an external sealing shoulder (11) from left to right;

the second internal thread (14) is in threaded connection with the first external thread (9), and the inner sealing shoulder (7) is in transition fit with the outer sealing shoulder (11);

socket head cap anticreep screw (12) pass anticreep screw hole (8) and lower extreme insert in anticreep hole (10), socket head cap anticreep screw (12) with anticreep screw hole (8) threaded connection, socket head cap anticreep screw (12) with anticreep hole (10) interference fit connects.

2. The semi-hermetic sealing special thread structure heat insulation oil pipe as claimed in claim 1, wherein the lower end positioning column (13) of the inner hexagonal anti-drop screw (12) is conical, the taper is 1:6, the inner end of the anti-drop hole (10) is a conical portion, and the lower end positioning column (13) is inserted into the conical portion and connected in an interference fit manner.

3. The semi-hermetic sealing special thread structure heat insulation oil pipe according to claim 1, wherein the inner sealing shoulder (7) and the outer sealing shoulder are both 90 degrees, and the matching amount is-0.05 mm to +0.05 mm.

4. The semi-hermetic seal special thread structure heat insulation oil pipe according to claim 1, wherein the pipe (4) has a pipe outside diameter (D) of 114.3mm, and the coupling (1) has a coupling outside diameter (M) of 139.7 mm.

5. The semi-hermetic sealing special thread structure heat insulation oil pipe according to claim 1, wherein the material of the sealing gasket (6) is polytetrafluoroethylene, and the thickness (t) of the sealing gasket is 3.175 mm.

6. The semi-hermetic sealing special thread structure heat insulation oil pipe according to claim 1, wherein the inner diameter (d) of the middle hole of the coupling is-25.4 mm.

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