CN217897772U

CN217897772U - Anticorrosive direct-connected oil casing pipe with high connection strength

Info

Publication number: CN217897772U
Application number: CN202221168564.2U
Authority: CN
Inventors: 关彪; 张国辉; 武磊; 张秀晶; 张玲玲
Original assignee: Tianjin Dehua Petroleum Equipment Manufacturing Co Ltd
Current assignee: Tianjin Dehua Petroleum Equipment Manufacturing Co Ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-11-25
Anticipated expiration: 2032-05-16

Abstract

The utility model discloses a high joint strength's anticorrosive straight type oil casing that links, the buret comprises a pipe, the right-hand member of pipe is the external screw thread end, and the left end is the internal thread end, the external screw thread end has set gradually external seal plane, first external screw thread, the outer sealed conical surface of second, second external screw thread, external seal circular bead just from outside to inside external screw thread end portion inboard is provided with the outer sealed conical surface of first external. The internal thread end is provided with a second internal thread, a second internal sealing conical surface, a first internal thread, an internal sealing plane and a first internal sealing conical surface in sequence from outside to inside. The application provides a technical scheme, set up double thread connection structure, joint strength is stronger. In addition, a multi-sealing structure is arranged, so that the sealing performance is better, and the popularization and the use in the industry are facilitated.

Description

Anticorrosive direct-connected oil casing pipe with high connection strength

Technical Field

The utility model relates to an oil casing structure technical field especially relates to a high joint strength's anticorrosive straight type oil casing pipe.

Background

The oil casing pipe is an important consumable used for oil exploitation, and is mainly used for supporting the wall of an oil well or a gas well in oil exploitation, preventing the bottom layer from collapsing and further ensuring the normal operation of the whole oil well in the drilling process and after well completion. The oil casing belongs to disposable consumptive material, can not used repeatedly.

Oil casings currently used in engineering generally include two types, a direct connection type and a collar type. The direct connection type does not need to use a coupling, and the pipe is directly used for connection; the coupling type needs to use a coupling, and two pipes are connected by using the coupling; the direct-connected oil casing is widely applied to working conditions of window sidetracking, old well repairing and the like with small well bores and relatively difficult downhole operation by virtue of the structural characteristic that the outer diameter of a joint is smaller than that of a coupling of a conventional oil casing, and is beneficial to downhole operation such as well descending and well cementation. However, the connection strength and the sealing property of the conventional direct connection type oil casing are to be further improved.

SUMMERY OF THE UTILITY MODEL

To the technical problem who exists among the above-mentioned prior art, the utility model aims at providing a high joint strength's anticorrosive straight type oil jacket pipe that links.

In order to achieve the above purpose, the utility model provides a technical scheme as follows:

the utility model provides an anticorrosive direct-connected oil casing pipe with high connection strength, which comprises a pipe, wherein the right end of the pipe is an external thread end, the left end of the pipe is an internal thread end, the external thread end is provided with an external sealing plane, a first external thread, a second external sealing conical surface, a second external thread and an external sealing circular bead from outside to inside in sequence, the inner side of the end part of the external thread end is provided with a first external sealing conical surface,

the second internal thread, a second internal sealing conical surface, a first internal thread, an internal sealing plane and a first internal sealing conical surface are sequentially arranged at the internal thread end from outside to inside; when the pipes are connected, the external thread end of one pipe is connected with the internal thread end of the other pipe, and a first external sealing conical surface, an external sealing plane, a first external thread, a second external sealing conical surface, a second external thread and an external sealing shoulder of the external thread end are respectively connected with a first internal sealing conical surface, an internal sealing plane, a first internal thread, a second internal sealing conical surface, a second internal thread and an internal thread end face of the internal thread end;

the outer circumferential surface of the pipe is coated with an anticorrosive coating.

The internal thread end is connected with a guide block used for being connected with the external thread end.

The guide block comprises a metal sleeve and a rubber sleeve, the lower end of the rubber sleeve is fixedly connected with the upper end of the metal sleeve, the rubber sleeve is sleeved outside the external thread end of the pipe, the upper end of the rubber sleeve is of a horn mouth structure, and the outer side of the rubber sleeve is large and the inner side of the rubber sleeve is small.

Wherein, the inner diameters of the metal sleeve and the rubber sleeve are consistent.

The metal sleeve and the rubber sleeve are respectively provided with two arc-shaped blocks, the two arc-shaped blocks are buckled together, the end parts of the two arc-shaped blocks are respectively provided with an outward flanged edge, and the flanges of the corresponding sides are connected through a detachable bolt.

Compared with the prior art, the beneficial effects of the utility model are that: the application provides a technical scheme has set up double thread connection structure, and joint strength is stronger. In addition, a multi-sealing structure is arranged, so that the sealing performance is better, and the popularization and the use in the industry are facilitated.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

FIG. 2 is a schematic structural view of an embodiment of the tube of the present application

FIG. 3 is a first schematic view of an embodiment of a guide block of the present application;

FIG. 4 is a second schematic view of an embodiment of a guide block of the present application;

in the figure, a pipe 1, a guide block 2, a first outer sealing conical surface 11, an outer sealing plane 12, a first outer thread 13, a second outer sealing conical surface 14, a second outer thread 15, an outer sealing shoulder 16, a first inner sealing conical surface 17, an inner sealing plane 18, a first inner thread 19, a second inner sealing conical surface 110, a second inner thread 111, a metal sleeve 21 and a rubber sleeve 22.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to 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", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

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

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Please refer to fig. 1-4, which illustrate an embodiment of the present invention.

The utility model provides an anticorrosive direct-connected oil casing with high connection strength, which comprises a pipe 1, wherein the right end of the pipe 1 is an external thread end, the left end is an internal thread end, the external thread end is provided with an external sealing plane 12, a first external thread 13, a second external sealing conical surface 14, a second external thread 15 and an external sealing shoulder 16 from outside to inside in sequence, the inner side of the end part of the external thread end is provided with a first external sealing conical surface 11,

the internal thread end is provided with a second internal thread 111, a second internal sealing conical surface 110, a first internal thread 19, an internal sealing plane 18 and a first internal sealing conical surface 17 from outside to inside in sequence; when the pipes 1 are connected, the external thread end of one pipe 1 is connected with the internal thread end of the other pipe 1, and the first external sealing conical surface 11, the external sealing plane 12, the first external thread 13, the second external sealing conical surface 14, the second external thread 15 and the external sealing shoulder 16 of the external thread end are respectively connected with the first internal sealing conical surface 17, the internal sealing plane 18, the first internal thread 19, the second internal sealing conical surface 110, the second internal thread 111 and the internal thread end face of the internal thread end;

The application provides a technical scheme, set up double thread connection structure, joint strength is stronger. In addition, set up many seal structure, the leakproofness is better, in addition, the outer periphery of pipe coats and has the anticorrosive coating, and the anticorrosive effect is better, and anticorrosive material adopts current material.

In a preferred embodiment, when the oil casing is connected, if the alignment effect is not good, the threads at the connection part are easily damaged, so that the connection strength and the sealing performance are affected. Therefore, the guide block 2 for connection with the male screw end is connected to the female screw end in this embodiment.

The guide block 2 comprises a metal sleeve 21 and a rubber sleeve 22, the lower end of the rubber sleeve 22 is fixedly connected with the upper end of the metal sleeve 21, the rubber sleeve 22 is sleeved on the outer side of the external thread end of the pipe 1, the upper end of the rubber sleeve 22 is of a bell-mouth structure, and the outer side is large and the inner side is small.

Wherein the inner diameters of the metal sleeve 21 and the rubber sleeve 22 are the same.

The metal sleeve 21 and the rubber sleeve 22 respectively comprise two arc-shaped blocks, the two arc-shaped blocks are buckled together, flanges which are outwards turned are arranged at the end parts of the two arc-shaped blocks, and the flanges on the corresponding sides are connected through detachable bolts.

It should be noted that the guide block is a detachable structure, and when in use, the guide block is fixedly connected through a bolt, and after in use, the guide block can be easily detached by detaching the bolt. When in use, the metal sleeve part of the guide block is sleeved on the pipe, so that the connection strength can be enhanced; the pipe stretches into from rubber sleeve, because rubber sleeve can effectively avoid haring the pipe, and the pipe inserts the back because the guide effect of guide block, can adjust well, and the linkage effect is better.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The anti-corrosion direct-connection type oil casing pipe with high connection strength is characterized by comprising a pipe (1), wherein the right end of the pipe (1) is an external thread end, the left end of the pipe is an internal thread end, the external thread end is sequentially provided with an external sealing plane (12), a first external thread (13), a second external sealing conical surface (14), a second external thread (15) and an external sealing shoulder (16) from outside to inside, and the inner side of the end part of the external thread end is provided with a first external sealing conical surface (11),

the internal thread end is provided with a second internal thread (111), a second internal sealing conical surface (110), a first internal thread (19), an internal sealing plane (18) and a first internal sealing conical surface (17) from outside to inside in sequence; when the pipes (1) are connected, the external thread end of one pipe (1) is connected with the internal thread end of the other pipe (1), and a first external sealing conical surface (11), an external sealing plane (12), a first external thread (13), a second external sealing conical surface (14), a second external thread (15) and an external sealing shoulder (16) of the external thread end are respectively connected with a first internal sealing conical surface (17), an internal sealing plane (18), a first internal thread (19), a second internal sealing conical surface (110), a second internal thread (111) and an internal thread end face of the internal thread end;

2. The high connection strength corrosion-resistant direct connection type oil bushing according to claim 1, wherein the female threaded end is connected with a guide block (2) for connection with the male threaded end.

3. The high-connection-strength corrosion-resistant direct-connection type oil casing pipe as claimed in claim 2, wherein the guide block (2) comprises a metal sleeve (21) and a rubber sleeve (22), the lower end of the rubber sleeve (22) is fixedly connected with the upper end of the metal sleeve (21), the rubber sleeve (22) is sleeved outside the external thread end of the pipe (1), the upper end of the rubber sleeve (22) is of a bell-mouth structure, and the outer side is large and the inner side is small.

4. The high connection strength corrosion-resistant direct connection type oil bushing according to claim 3, wherein the metal sleeve (21) and the rubber sleeve (22) have the same inner diameter.

5. The high-connection-strength corrosion-resistant direct-connection oil casing according to claim 4, wherein the metal sleeve (21) and the rubber sleeve (22) respectively comprise two arc-shaped blocks, the two arc-shaped blocks are buckled together, flanges turned outwards are arranged at the end parts of the two arc-shaped blocks, and the flanges on the corresponding sides are connected through detachable bolts.