CN206072588U

CN206072588U - The pipe box cupling that a kind of oil liner oil pipe is used

Info

Publication number: CN206072588U
Application number: CN201620751439.2U
Authority: CN
Inventors: 郝鹏程; 刘庆; 杨小平; 于春雷; 任鹏飞; 刘猛; 王立彬; 李建华; 宋瑞明; 刘鑫
Original assignee: Shaanxi Technology Services Branch Petrochina Coalbed Methane Co Ltd
Current assignee: Shaanxi Technology Services Branch Petrochina Coalbed Methane Co Ltd
Priority date: 2016-07-15
Filing date: 2016-07-15
Publication date: 2017-04-05
Anticipated expiration: 2026-07-15

Abstract

The pipe box cupling that a kind of oil liner oil pipe is used，Internal lining pipe is socketed in oil pipe and which has radial direction flanging，The two ends car outer tube taper thread of oil pipe，The internal diameter two ends car inner tube taper thread of pipe box cupling，The nominal bore diameter of inner tube taper thread is equal to the nominal outside diameter of outer tube taper thread，Get on the bus in the stage casing internal diameter of pipe box cupling and be formed with bulge loop groove，Connection in bulge loop groove is fitted with convex bushing，The internal diameter of convex bushing is equal with the internal diameter of the internal lining pipe，The maximum outside diameter of convex bushing is equal with the internal diameter of the bulge loop groove，Two step radial diameters of convex bushing are equal with the internal diameter of pipe box cupling，Two axial ends of convex bushing respectively between inner tube taper thread formed two concave ring grooves，The axial width of each concave ring groove≤radial direction flanging width，Couple convex bushing in the bulge loop groove of pipe box cupling，After two oil pipes are docked with pipe box cupling，The radial direction flanging of oil pipe is brought into close contact with convex bushing two ends，Stop-leak compound is stored in two concave ring grooves，Convex bushing makes have good sealing between pipe box cupling and two oil pipes.

Description

The pipe box cupling that a kind of oil liner oil pipe is used

Technical field

This utility model belongs to oil pipe fitting technical field, the pipe box cupling that especially a kind of oil liner oil pipe is used.

Background technology

Domestic each elephant uses oil liner oil pipe in a large number at present, and oil liner oil pipe is that internal lining pipe is socketed in oil pipe And internal lining pipe is formed with outer tube taper thread, internal lining pipe in the mouth of pipe two ends car that its nose end has radial direction flanging, oil liner oil pipe High-molecular polythene pipe adopted generally, internal lining pipe has that surface is smooth, flexible effect, one can be prevented from sucker rod and oil pipe Wall produces direct friction, and two can be the wear extent for reducing sucker rod, and three are kept apart oil pipe with crude oil using internal lining pipe, by In the complicated component of crude oil, often with stronger corrosivity, therefore internal lining pipe can greatly reduce the corrosion to oil pipe.

In actually used, adjacent oil pipe is to implement to dock by common box cupling, and common box cupling is a kind of with inner pipe The pipe collar of taper thread, first applies in common box cupling during docking and touches stop-leak compound, and stop-leak compound is applied to be touched excessive or very few can affect docking Sealing property, common box cupling dock oil liner oil pipe when cannot ensure being brought into close contact between radial direction flanging described in two, And then one section of long or short annular gap is left, during use over a long time, the possible prolonged stay of crude oil is in the annular Inwall directly contact in gap and with common box cupling, and then cause corrosion to scrap common box cupling, in addition common box cupling and oil Pipe taper thread between pipe does not have sealing, and during life-time service meeting, crude oil can be slowly penetrated in thread pitch, cause screw-thread rust, The sealing of destruction screw thread.

The content of the invention

To solve the above problems, this utility model designs the pipe box cupling that a kind of oil liner oil pipe is used, in pipe box cupling By bushing, connection bushing, can ensure that two radial direction flanging of oil liner oil pipe is brought into close contact in concave ring groove, can be with by bushing Ensure that crude oil is not penetrated in thread pitch, sealing is preferable during use.

For achieving the above object, this utility model is adopted the following technical scheme that：

The pipe box cupling that a kind of oil liner oil pipe is used, oil liner oil pipe are that internal lining pipe and internal lining pipe are socketed in oil pipe The mouth of pipe two ends car in its nose end with radial direction flanging, oil liner oil pipe is formed with outer tube taper thread, spy of the present utility model Levy as follows：

At the internal diameter two ends of pipe box cupling, car is formed with inner tube taper thread respectively, and the nominal bore diameter of inner tube taper thread is equal to outside described The nominal outside diameter of pipe taper thread, gets on the bus in the stage casing internal diameter of pipe box cupling and is formed with bulge loop groove, and connection in the bulge loop groove is fitted with convex Bushing, the internal diameter of convex bushing are equal with the internal diameter of the internal lining pipe, the internal diameter phase of the maximum outside diameter of convex bushing and the bulge loop groove Deng two step radial diameters of convex bushing are equal with the internal diameter of pipe box cupling, and two axial ends of convex bushing bore spiral shell with inner tube respectively Two concave ring grooves, the axial width≤radial direction flanging width of each concave ring groove are formed between stricture of vagina.

Convex bushing is made by high-molecular polythene.

As using techniques described above scheme, this utility model produces following good effect：

1st, couple convex bushing in the bulge loop groove of pipe box cupling, after two oil liner oil pipes are docked with pipe box cupling, oil liner The radial direction flanging of oil pipe is brought into close contact with convex bushing two ends, and the stop-leak compound of filling is stored in two concave ring grooves, stop-leak compound and tight Closely connected conjunction can ensure that crude oil is not penetrated in pipe taper thread gap, and convex bushing makes to be had between pipe box cupling and two oil liner oil pipes There is good sealing.

2nd, as two oil liner oil pipes and convex bushing have good sealing, crude oil can be avoided direct with pipe box cupling Contact, reduce the fouling corrosion of pipe box cupling, while it also avoid crude oil penetrate into pipe taper thread screw thread in, improve pipe box cupling with The linking intensity of oil liner oil pipe.

Description of the drawings

Fig. 1 is the structure schematic diagram of this utility model pipe box cupling.

Fig. 2 is partial enlarged drawing when pipe box cupling is coupled with oil liner oil pipe.

In above-mentioned figure：1- pipe box cuplings；1.1- inner tube taper threads；1.2- concave ring groove；The convex bushings of 2-；3- oil pipes；4- internal lining pipes.

It is embodied as content

This utility model is the pipe box cupling that a kind of oil liner oil pipe is used, and oil liner oil pipe is the socket in oil pipe 3 Internal lining pipe 4 and internal lining pipe 4 is formed with outer tube taper thread in the mouth of pipe two ends car that its nose end has radial direction flanging, oil pipe 3.

With reference to Fig. 1, at the internal diameter two ends of pipe box cupling 1, car is formed with inner tube taper thread 1.1, the public affairs of inner tube taper thread 1.1 respectively Claim internal diameter to be equal to the nominal outside diameter of the outer tube taper thread, get on the bus in the stage casing internal diameter of pipe box cupling 1 and be formed with bulge loop groove, the bulge loop Connection in groove is fitted with convex bushing 2, and the internal diameter of convex bushing is equal with the internal diameter of the internal lining pipe, the maximum outside diameter of convex bushing and institute The internal diameter for stating bulge loop groove is equal, and two step radial diameters of convex bushing are equal with the internal diameter of pipe box cupling, and convex bushing 2 is by polyphosphazene polymer Ethylene is made, and two axial ends of convex bushing 2 form two concave ring grooves 1.2 respectively between inner tube taper thread, and each is recessed The axial width of the annular groove 1.2≤radial direction flanging width.

During use, couple convex bushing 2 in the bulge loop groove of pipe box cupling 1, and sealing is filled in two concave ring grooves 1.2 Fat, after oil pipe 3 is docked with pipe box cupling 1, makes 2 liang of the radial direction flanging of oil pipe 3 and convex bushing by the connection of male and female pipe taper thread End is brought into close contact, and the stop-leak compound of filling is stored in two concave ring grooves 1.2, with being brought into close contact, stop-leak compound can ensure that crude oil will not Penetrate in pipe taper thread gap, convex bushing 2 makes have good sealing between pipe box cupling 1 and oil pipe 3, there is provided oil pipe 3, interior The service life of bushing pipe 4 and pipe box cupling 1, the effect of generation is clearly.

Claims

1. the pipe box cupling that a kind of oil liner oil pipe is used, oil liner oil pipe are in the interior socket internal lining pipe (4) of oil pipe (3) and interior Bushing pipe (4) is formed with outer tube taper thread in the mouth of pipe two ends car that its nose end has radial direction flanging, oil pipe (3), it is characterized in that：

At the internal diameter two ends of pipe box cupling (1), car is formed with inner tube taper thread (1.1), the nominal bore diameter of inner tube taper thread (1.1) respectively Equal to the nominal outside diameter of the outer tube taper thread, get on the bus in the stage casing internal diameter of pipe box cupling (1) and be formed with bulge loop groove, in the bulge loop groove Connection is fitted with convex bushing (2), and the internal diameter of convex bushing (2) is equal with the internal diameter of the internal lining pipe, the maximum outside diameter of convex bushing (2) Equal with the internal diameter of the bulge loop groove, two step radial diameters of convex bushing (2) are equal with the internal diameter of pipe box cupling (1), convex bushing (2) two axial ends respectively between inner tube taper thread formed two concave ring grooves (1.2), the axial direction of each concave ring groove (1.2) Width≤radial direction flanging the width.

2. the pipe box cupling that a kind of oil liner oil pipe is used according to claim 1, is characterized in that：Convex bushing (2) is by high score Sub- polyethylene is made.