CN211040114U

CN211040114U - Expanding temporary pipeline plug

Info

Publication number: CN211040114U
Application number: CN201921803788.4U
Authority: CN
Inventors: 吴登亮; 杜林辉; 李安国
Original assignee: China Petroleum and Chemical Corp
Current assignee: China Petroleum and Chemical Corp
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-07-17
Anticipated expiration: 2029-10-25

Abstract

The application relates to the technical field of downhole tools, in particular to an expansion type temporary pipeline plug, which comprises a flow guide pipe, wherein the outer wall of the flow guide pipe is alternately sleeved with a special-shaped compression capsule and a special-shaped thrust plate, the section of the special-shaped compression capsule is a trapezoidal surface with a small top and a large bottom, and the section of the special-shaped thrust plate is a trapezoidal surface with a large top and a small bottom; the liquid inlet end of the flow guide pipe is screwed with a compression expansion nut, and the compression expansion nut is in abutting contact with the special-shaped thrust plate at the outermost end; the ball valve, the hydraulic quick connector, the high-pressure flexible rubber hose, the hydraulic quick connector, the ball valve and the metal guide pipe are connected in sequence behind the liquid inlet end of the flow guide pipe. The temporary plugging device is convenient to install during temporary plugging construction, the sealing surface of the metal component is an embedded inclined surface, and the effective sealing surface is increased; the sealing surface of the capsule is meshed with the copper thrust plate for sealing, the thrust plate is pushed to advance under the screwing action of the nut during working so as to extrude and compress the capsule, the greater the tension is, the more remarkable the sealing effect is, the capsule can continuously keep enough deformation, and the sealing between the capsule and a pipeline is ensured.

Description

Expanding temporary pipeline plug

Technical Field

The application relates to the technical field of downhole tools, in particular to an expansion type temporary pipeline blockage.

Background

With the increasing service life of oil field pipelines and the increasing environmental protection pressure, part of the oil field pipelines are located at the periphery of water areas, farmlands, villages and populus diversifolia forest protection areas. The pipeline is affected by factors such as water content and hydrogen sulfide, the pipeline is seriously corroded, perforation happens, and the pipeline corrosion control is urgent. However, in the actual treatment process, part of the valve banks for production of the transfer station are affected by factors such as salt water corrosion and scaling due to long service life, and internal leakage occurs in part of the valves entering the station, so that the gate cannot be completely closed or not tightly closed, and residual pressure in the production pipeline cannot be completely discharged in the corrosion treatment implementation process. The pipe breakage under pressure has the problems of oil gas leakage, hydrogen sulfide dissipation and the like, and the welding operation cannot be carried out at the pipe breakage position. If the mode of replacing the gate is adopted, the construction difficulty is high, the construction cost is high, the production is stopped and corrected, and the influence on the oil well yield is large, so that the valve leakage is a road barricade which restricts the pipeline treatment process.

Disclosure of Invention

The application provides an expansion type pipeline temporary blocking, has overcome above-mentioned prior art not enough, and it is to leaking in the valve, close not tight scheduling problem and deal with, is the effective means of guaranteeing the regional safe construction of operation behind the disconnected pipe.

The purpose of the application is realized as follows: an expansion type temporary pipeline plug comprises a flow guide pipe, wherein special-shaped compression capsules and special-shaped thrust plates are sleeved on the outer wall of the flow guide pipe at intervals, the section of each special-shaped compression capsule is a trapezoidal surface with a small upper part and a large lower part, and the section of each special-shaped thrust plate is a trapezoidal surface with a large upper part and a small lower part; the liquid inlet end of the flow guide pipe is screwed with a compression expansion nut, and the compression expansion nut is in abutting contact with the special-shaped thrust plate at the outermost end; the ball valve, the hydraulic quick connector, the high-pressure flexible rubber hose, the hydraulic quick connector, the ball valve and the metal guide pipe are connected in sequence behind the liquid inlet end of the flow guide pipe.

This application is rational in infrastructure and compact, the design simple structure, it is ingenious, simple to operate during stifled construction temporarily, metal component adopts copper material car processing to form, sealed face is embedded inclined plane, its effective seal face increases, sealed effect is more prominent, the capsule is once only pour by the grinding apparatus and is formed, the sealed face of capsule is sealed with the interlock each other of copper thrust plate, the during operation is under the effect of screwing of nut, promote the thrust plate and advance, thereby the extrusion, compress the capsule, tension is big more, sealed effect is showing more, the sustainable enough deformation volume that keeps of capsule, ensure with the pipeline between sealed.

The design pressure is 4Mpa, but in the actual operation process, the medium in the pipeline is recommended to be drained, and the pressure of the operation area is preferably kept to be the lowest. At present, the pipeline is processed and manufactured according to the specification of the conventional production pipeline, is mainly suitable for 4 specifications of ∅ mm, ∅ mm, ∅ mm and ∅ mm, and achieves the expected target through the field practical application effect.

Drawings

The specific structure of the application is given by the following figures and examples:

FIG. 1 is a schematic cross-sectional structural view of the present application.

Legend: 1. the special-shaped compression capsule comprises a special-shaped compression capsule body 2, a copper special-shaped thrust plate 3, a compression expansion copper nut 4, a ball valve 5, a hydraulic quick connector 6, a high-pressure soft rubber pipe 7, a hydraulic quick connector 8, a ball valve 9, a metal guide pipe 10, a copper backflow pipe 11 and a pipeline.

Detailed Description

The present application is not limited to the following examples, and specific implementations may be determined according to the technical solutions and practical situations of the present application.

In the application, for convenience of description, the description of the relative positional relationship of the components is described according to the layout of fig. 1 of the specification, such as: the positional relationship of up, down, left, right, etc. is determined in accordance with the layout direction of fig. 1 in the specification.

The present application is further described with reference to the following examples and accompanying drawings:

example (b): as shown in the attached drawing 1, the expandable temporary pipeline plug comprises a flow guide pipe 10, wherein the outer wall of the flow guide pipe 10 is coated and sleeved with a special-shaped compressed capsule 1 and a special-shaped thrust plate 2 at intervals, the section of the special-shaped compressed capsule 1 is a trapezoidal surface with a small top and a large bottom, and the section of the special-shaped thrust plate 2 is a trapezoidal surface with a large top and a small bottom; a compression expansion nut 3 is screwed at the liquid inlet end of the draft tube 10, and the compression expansion nut 3 is in abutting contact with the outermost special-shaped thrust plate 2; the ball valve 4, the hydraulic quick connector 5, the high-pressure soft rubber pipe 6, the hydraulic quick connector 7, the ball valve 8 and the metal guide pipe 9 are connected in sequence behind the liquid inlet end of the guide pipe 10.

Compress tightly expansion copper nut through constantly screwing up, constantly promote copper abnormal shape thrust plate extrusion abnormal shape compression capsule under the effort of nut and make its inflation, thereby realize the sealed between abnormal shape compression capsule and the pipeline, reach the purpose of stifled temporarily, oil, gas in its pipeline, aqueous medium passes through the copper flow reversing pipe, high pressure flexible glue pipe, the release is realized far away to metal conduit, guarantee here that the cut-off department does not have the oil gas leakage, provide safety guarantee's final purpose for the flange welding, thoroughly solve the difficult embarrassment of corruption management.

Firstly, confirming that the leakage amount in the pipeline is moderate, manually cold cutting the pipeline to break the pipeline, opening 6 front and rear ball valves 4 and 8 of a high-pressure rubber pipe, and penetrating a prepared matched welding flange from 9 metal guide pipes in advance. Will temporarily block up along 10 copper backflow pipe one end leading-in pipeline disconnected pipe department hug closely 3 compress tightly expand copper nut position can, use spanner fastening 3 to compress tightly and expand copper nut, 3 compress tightly and expand copper nut and promote 2 copper abnormal shape thrust plates, thereby extrude 1 abnormal shape compression capsule and make its inflation, and then realize 1 sealed between abnormal shape compression capsule and the 11 pipelines, the medium in the pipeline passes through 10 copper backflow pipe, 6 high pressure flexible glue pipes, 9 metal conduit realizes release far away, confirm operation regional safety, no medium leaks back welded connection flange, release capsule tension at last, take out temporarily block up, install the blind plate additional can.

The foregoing description is by way of example only and is not intended as limiting the embodiments of the present application. All obvious variations and modifications of the present invention are within the scope of the present invention.

Claims

1. The utility model provides an expansion pipe temporary plug which characterized in that: the special-shaped compression type thrust plate comprises a flow guide pipe, wherein special-shaped compression capsules and special-shaped thrust plates are wrapped and sleeved on the outer wall of the flow guide pipe at intervals, the section of each special-shaped compression capsule is a trapezoidal surface with a small upper part and a large lower part, and the section of each special-shaped thrust plate is a trapezoidal surface with a large upper part and a small lower part; the liquid inlet end of the flow guide pipe is screwed with a compression expansion nut, and the compression expansion nut is in abutting contact with the special-shaped thrust plate at the outermost end; the ball valve, the hydraulic quick connector, the high-pressure flexible rubber hose, the hydraulic quick connector, the ball valve and the metal guide pipe are connected in sequence behind the liquid inlet end of the flow guide pipe.