CN219492214U - Novel special oil-fastening sleeve - Google Patents

Abstract

The utility model discloses a novel special oil buckling sleeve, which comprises an oil sleeve pipe body and a coupling, wherein the oil sleeve pipe body is connected through the coupling, the oil sleeve pipe body and the coupling are of a bilateral symmetry structure, and an anti-falling block is sleeved at the joint of the oil sleeve pipe body and the coupling; the anti-drop block is annular, the left end of the anti-drop block is a small-diameter end connected with the oil sleeve pipe body, a plurality of pipe body limiting grooves are formed in the inner circumferential surface of the small-diameter end at intervals, the right end of the anti-drop block is a large-diameter end connected with the coupling, and a plurality of coupling limiting grooves are formed in the inner circumferential surface of the large-diameter end at intervals. The application provides an anticreep structure utilizes the anticreep piece can carry out spacingly with coupling and oil casing body, prevents that both from taking place relative rotation, has avoided the junction to take place not hard up, has guaranteed performance such as the leakproofness of oil casing, thermal insulation.

Description

Novel special oil-fastening sleeve

Technical Field

The utility model relates to the technical field of oil casing structures for oil and gas drills, in particular to a novel special oil buckling casing.

Background

The special petroleum pipe is mainly used for drilling oil and gas wells, conveying oil and gas and the like. Petroleum-specific tubing typically includes petroleum drill pipe, petroleum casing, oil extraction pipe, and the like. Among these, petroleum casing is a lifeline that maintains the operation of an oil well. The petroleum casing pipe is one kind of large caliber pipe and has the function of fixing petroleum and natural gas well wall or hole. When in use, the petroleum casing is inserted into the well hole and fixed by cement, so as to ensure the smooth proceeding of the drilling process and the normal operation of the whole oil well after completion.

Currently, commonly used oil casings include an oil casing body and a corresponding collar, and the oil casing body and the collar are connected by threads. After the oil sleeve connected through the threads is used for a long time, the joint is easy to loosen, the tightness, the heat insulation performance and the like of the oil sleeve are affected, and the falling accident is seriously caused. In view of the above, there is a need for an improved oil casing construction.

Disclosure of Invention

Aiming at the technical problems in the prior art, the utility model aims to provide a novel special oil buckling sleeve.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

the novel special oil buckling sleeve comprises an oil sleeve body and a coupling, wherein the oil sleeve body is connected through the coupling, the oil sleeve body and the coupling are of a bilateral symmetry structure, and an anti-falling block is sleeved at the joint of the oil sleeve body and the coupling;

the anti-drop block is annular, the left end of the anti-drop block is a small-diameter end connected with the oil sleeve pipe body, a plurality of pipe body limiting grooves are formed in the inner circumferential surface of the small-diameter end at intervals, the right end of the anti-drop block is a large-diameter end connected with a coupling, and a plurality of coupling limiting grooves are formed in the inner circumferential surface of the large-diameter end at intervals;

the ends of the two ends of the oil sleeve pipe body are respectively provided with a plurality of pipe body limiting blocks along the circumferential direction at intervals, and the ends of the two ends of the coupling are respectively provided with a plurality of coupling limiting blocks along the circumferential direction at intervals; the pipe body limiting block is connected with the pipe body limiting groove and the coupling limiting block is connected with the coupling limiting groove in an interference fit mode.

Wherein, body stopper, body spacing groove, coupling stopper, coupling spacing groove are all evenly spaced the setting.

Wherein, body stopper, body spacing groove, coupling stopper, coupling spacing groove are 4.

The wall of the coupling is internally provided with an annular sealing cavity which is vacuum, a plurality of communication supporting rings are uniformly arranged in the sealing cavity along the axial interval, and the communication supporting rings are provided with left and right communicated through holes.

The wall of the coupling is internally provided with an annular sealing cavity, and the sealing cavity is filled with heat insulation materials.

Wherein, the screw thread of oil casing body and coupling adopts buttress screw thread.

Wherein, the outside periphery of anticreep piece is provided with the anticorrosive coating.

Compared with the prior art, the utility model has the beneficial effects that:

1. the application provides an anti-drop structure, which utilizes the anti-drop block to limit the coupling and the oil sleeve body, prevents the coupling and the oil sleeve body from relative rotation, avoids loosening at the joint, and ensures the tightness, heat insulation and other performances of the oil sleeve;

2. in addition, the coupling is provided with the heat insulation structure, the heat loss at the coupling can be effectively guaranteed, and in addition, the heat insulation structure is internally provided with the communication support ring, so that the coupling can be effectively prevented from deforming;

3. the anti-drop piece outside that this application provided has set up the anticorrosive coating, can improve the life of anti-drop piece through setting up the anticorrosive coating.

Drawings

Fig. 1 is a schematic structural diagram provided in embodiment 1 of the present application;

in the figure, an oil casing body 1, an anti-drop block 2 and a coupling 3;

fig. 2 is a schematic structural diagram of the anti-drop block in embodiment 1 of the present application;

in the figure, a metal layer 21, an anti-corrosion layer 22, a coupling limit groove 23 and a pipe body limit groove 24;

FIG. 3 is a schematic left-hand view of the anti-slip block of example 1 of the present application;

FIG. 4 is a right side view schematically illustrating the anti-drop block in embodiment 1 of the present application;

fig. 5 is a schematic structural diagram of a pipe body limiting block in embodiment 1 of the present application;

in the figure, a pipe body limiting block 6;

FIG. 6 is a schematic view of the connection structure of the oil casing in embodiment 1 of the present application;

in the figure, a first sealing shoulder 7, a first connecting thread segment 8, a first conical sealing surface 9, a second connecting thread segment 10, a second conical sealing surface 11, a first torque-resistant shoulder 12;

FIG. 7 is a schematic view of a coupling connection structure in example 1 of the present application;

in the figures, a second sealing shoulder 13, a third connecting thread segment 14, a third conical sealing surface 15, a fourth connecting thread segment 16, a fourth conical sealing surface 17, a second torque-resistant shoulder 18;

fig. 8 is a schematic structural view of embodiment 2 of the present application;

in the figure, the sealing cavity 4 is in communication with the support ring 5.

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.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Example 1

Referring to fig. 1-7, an embodiment structure of the present utility model is shown.

The embodiment provides a novel special oil buckling sleeve, which comprises an oil sleeve pipe body 1 and a coupling 3, wherein the oil sleeve pipe body 1 is connected through the coupling 3, the oil sleeve pipe body 1 and the coupling 3 are of a bilateral symmetry structure, and an anti-falling block 2 is sleeved at the joint of the oil sleeve pipe body 1 and the coupling 3;

the anti-drop block 2 is annular, the left end of the anti-drop block is a small-diameter end connected with the oil sleeve pipe body 1, a plurality of pipe body limiting grooves 24 are formed in the inner circumferential surface of the small-diameter end at intervals, the right end of the anti-drop block is a large-diameter end connected with the coupling 3, and a plurality of coupling limiting grooves 23 are formed in the inner circumferential surface of the large-diameter end at intervals;

the ends of the two ends of the oil sleeve pipe body 1 are respectively provided with a plurality of pipe body limiting blocks 6 at intervals along the circumferential direction, and the ends of the two ends of the coupling 3 are respectively provided with a plurality of coupling limiting blocks at intervals along the circumferential direction;

the pipe body limiting block 6 is connected with the pipe body limiting groove 24 and the coupling limiting block is connected with the coupling limiting groove 23 in an interference fit mode.

The application provides an anticreep structure utilizes the anticreep piece can carry out spacingly with coupling and oil casing body, prevents that both from taking place relative rotation, has avoided the junction to take place not hard up, has guaranteed performance such as the leakproofness of oil casing, thermal insulation.

Preferably, the pipe body limiting blocks 6, the pipe body limiting grooves 24, the coupling limiting blocks and the coupling limiting grooves 23 are uniformly arranged at intervals. The number of the pipe body limiting blocks 6, the pipe body limiting grooves 24, the coupling limiting blocks and the coupling limiting grooves 23 is 4, and the number of the pipe body limiting blocks, the pipe body limiting grooves 24, the coupling limiting grooves 23 can be 5 or 6, or other numbers.

In addition, the oil casing pipe body connecting structure of the oil casing pipe body 1 comprises a first sealing shoulder 7, a first connecting thread section 8, a first conical sealing surface 9, a second connecting thread section 10, a second conical sealing surface 11 and a first torque-resisting shoulder 12 which are sequentially arranged from inside to outside;

the coupling connection structure of the coupling comprises a second sealing shoulder 13, a third connecting thread section 14, a third conical sealing surface 15, a fourth connecting thread section 16, a fourth conical sealing surface 17 and a second torque-resistant shoulder 18 which are sequentially connected from outside to inside;

when the two are screwed in, the first sealing shoulder 7 is connected with the second sealing shoulder 13, the first connecting thread section 8 is connected with the third connecting thread section 14 in a threaded manner, the first conical sealing surface 9 is connected with the third conical sealing surface 15 in a sealing manner, the second connecting thread section 10 is connected with the fourth connecting thread section 16 in a threaded manner, the second conical sealing surface 11 is connected with the fourth conical sealing surface 17 in a sealing manner, and the first torque-resistant shoulder 12 is connected with the second torque-resistant shoulder 18 in an interference fit manner.

In this application, adopt many sealed conical surfaces and double screw connection structure, antitorque structure, can improve the intensity of connection, leakproofness and antitorque performance.

The screw threads of the oil casing pipe body 1 and the coupling 3 adopt buttress threads, and adopt buttress threads, so that the tooth profile is wide, the axial load bearing capacity is strong, and the connection strength is high.

Preferably, the outer circumferential surface of the anti-drop block is provided with an anti-corrosion layer 22, and the inner side is provided with a metal layer 21. Wherein, the material of the anticorrosion layer 22 can be epoxy resin anticorrosive paint, and the anticorrosion effect is good.

Example 2

As shown in fig. 8, the structure of the embodiment provided in the present application on the basis of embodiment 1 is shown.

An annular sealing cavity 4 is arranged in the wall of the coupling, the sealing cavity 4 is vacuum, a plurality of communication supporting rings 5 are uniformly arranged in the sealing cavity 4 along the axial direction at intervals, and through holes which are communicated left and right are formed in the communication supporting rings 5. The sealing cavity 4 can be filled with heat insulation materials. Wherein the heat insulating material is aerogel or other materials in the prior art.

This application coupling has set up thermal-insulated structure, and this thermal-insulated structure can effectively ensure that coupling department heat is less runs off, in addition, has set up the intercommunication supporting ring in the thermal-insulated structure, can effectively prevent that the coupling from warping.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (7)

1. The novel special oil buckling sleeve is characterized by comprising an oil sleeve pipe body (1) and a coupling (3), wherein the oil sleeve pipe body (1) is connected through the coupling (3), the oil sleeve pipe body (1) and the coupling (3) are of a bilateral symmetry structure, and an anti-falling block (2) is sleeved at the joint of the oil sleeve pipe body (1) and the coupling (3);

the anti-drop block (2) is annular, the left end of the anti-drop block is a small-diameter end connected with the oil sleeve body (1), a plurality of pipe body limiting grooves (24) are formed in the inner circumferential surface of the small-diameter end at intervals, the right end of the anti-drop block is a large-diameter end connected with the coupling (3), and a plurality of coupling limiting grooves (23) are formed in the inner circumferential surface of the large-diameter end at intervals;

the ends of the two ends of the oil casing pipe body (1) are respectively provided with a plurality of pipe body limiting blocks (6) at intervals along the circumferential direction, and the ends of the two ends of the coupling (3) are respectively provided with a plurality of coupling limiting blocks at intervals along the circumferential direction; the pipe body limiting block (6) is connected with the pipe body limiting groove (24) and the coupling limiting block is connected with the coupling limiting groove (23) in an interference fit mode.

2. The novel special oil-buckled sleeve according to claim 1, wherein the pipe body limiting blocks (6), the pipe body limiting grooves (24), the coupling limiting blocks and the coupling limiting grooves (23) are uniformly arranged at intervals.

3. The novel special oil-well casing according to claim 1, wherein the number of the pipe body limiting blocks (6), the pipe body limiting grooves (24) and the number of the coupling limiting blocks and the number of the coupling limiting grooves (23) are all 4.

4. The novel special oil-buckling sleeve according to claim 1, wherein an annular sealing cavity (4) is arranged in the wall of the coupling, the sealing cavity (4) is vacuum, a plurality of communicating supporting rings (5) are uniformly arranged in the sealing cavity (4) along the axial interval, and through holes communicated left and right are formed in the communicating supporting rings (5).

5. The novel special oil-well casing according to claim 1, wherein an annular sealing cavity (4) is arranged in the wall of the coupling, and the sealing cavity (4) is filled with heat insulation materials.

6. The novel special oil-well casing according to claim 1, wherein the threads of the oil-well casing body (1) and the coupling (3) are buttress threads.

7. The novel special oil-buckling sleeve according to claim 1, wherein an anti-corrosion layer (22) is arranged on the outer circumferential surface of the anti-falling block (2).