Variable-diameter pipeline sealing clamp and pipeline maintenance method

Abstract

The invention provides a variable-diameter pipeline sealing clamp and a pipeline maintenance method. The variable-diameter pipeline sealing clamp comprises a plurality of clamping plates which are sequentially spliced along the circumferential direction of a to-be-repaired pipeline, wherein the pipeline comprises a damaged pipe section and non-damaged pipe sections arranged on the two sides of thedamaged pipe section; the variable-diameter pipeline sealing clamp further comprises of transition assemblies, the transition assemblies sleeve the non-damaged pipe sections at least one side of thedamaged tube section, the plurality of clamping plates wrap around the outer side of the damaged pipe section and are connected with the non-damaged pipe sections through the transition assemblies, wherein the inner diameter of each transition assembly is matched with the outer diameter of the corresponding non-damaged pipe sections; and a pipe body wrapping space used for wrapping around the damaged pipe section is formed between the plurality of clamping plates and the transition assemblies on the two sides of the damaged pipe section, the damaged pipe section is sealed in the pipe body wrapping space. According to the variable-diameter pipeline sealing clamp, the problem that a using range of a pipeline repairing device in the prior art is relatively single is solved.

Description

technical field [0001] The invention relates to the field of oilfield pipeline maintenance, in particular to a variable-diameter pipeline sealing fixture and a pipeline maintenance method. Background technique [0002] At present, pressure plugging technology or injection sealing technology is often used in oilfield pipeline maintenance. This technology mainly uses special clamps to wrap the pipeline to be repaired, and injects special sealant into it to achieve the sealing effect. It is suitable for medium temperature and The pressure range is wide, the operation is relatively simple, and it has been widely promoted and applied at home and abroad. [0003] In construction and application, under the condition that the strength design and quality of the fixture are guaranteed, the internal pressure of the fixture is the resultant force of the system pressure leaked into the sealed cavity and the extrusion force of the sealant that completes the seal, and the pipeline will bea...

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a variable-diameter pipeline sealing jig and pipeline maintenance method to solve the problem that the scope of use of the pipeline patcher in the prior art is relatively single

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