Diversion-type pipeline plugging device without stop of oil-gas conveying

Abstract

The invention provides a diversion-type pipeline plugging device without stop of oil-gas conveying. The diversion-type pipeline plugging device is applied to quick plugging during the leakage of the oil-gas process pipeline. The pipeline plugging device performs the automatic pressure oil-gas diversion work and the pipeline soldering plugging work by the adoption of a pressure oil-gas diversion technology in combination with a pneumatic valve group, a quick clamping mechanism, an automatic diversion mechanism and an automatic control mechanism. Soldering lug clamps quickly clamp a welding body to the leakage position of the pipeline through the quick clamping mechanism and a screw mechanism, and plugging is completed through the soldering plugging work; an automatic movable valve group and a fixed valve group are adopted for a diversion device to form the automatic diversion mechanism for completing the outward drainage in the automatic diversion work and the flow intercepting in the soldering plugging work; an automatic controller achieves the smooth start and stop of the fixed valve group through the automatic control mechanism, an automatic locking mechanism, the pneumatic adjustment of the pneumatic valve groups and the thrust of an automatic control spring; and the pneumatic valve group drives the automatic movable valve group to slide vertically through the automatic control mechanism by means of pneumatic transmission so as to complete the locking and unlocking of the automatic locking mechanism.

Description

technical field [0001] The invention relates to a plugging device used in the oil and gas process pipeline leakage in the field of petroleum engineering, in particular to a diversion type pipeline rapid plugging device and a plugging method for non-stop transportation of oil and gas. Background technique [0002] Due to the defects of its own manufacturing and processing and the corrosion of oil and gas transmission medium, oil and gas process pipelines can easily lead to leakage of oil and gas process pipelines and valves on them, and the leaked oil and gas medium is often at pressure, temperature and along the leak. The state of jet flow. For this reason, oil and gas pipelines under pressure, especially the rapid plugging of non-stop transportation is an important guarantee for the safe operation of onshore and offshore oil and gas pipeline operations. The development cost of the plugging device itself also includes the cost of leaked oil and gas during the plugging const...

AI Technical Summary

Problems solved by technology

[0003] There are many ways and means of non-stop conveying plugging. At present, the commonly used rapid plugging technologies at home and abroad are summarized as follows: 1) Injection type pressure plugging technology can be used in medium-pressure and low-pressure environments. The disadvantage is that the injection The gun is easy to cause impact damage to the pipeline body, and the whole set of injection equipment is bulky, the sealant production and on-site injection process are complicated, and the construction work takes a long time; Rapid curing, but this technology is only suitable for low-pressure working conditions below 1MPa, and the existing various adhesives are not suitable for direct bonding under pressure. It is necessary to design a diversion device for bonding under pressure, which is inconvenient for on-site operation; 3) Fast Bundling plugging technology, the plugging equipment does not need to be prefabricated, and it has strong adaptability to the leakage area of ​​the pipeline, but when the strapping is wound, a sufficient tensile force must be used, which is difficult to meet the transportation requirements of high-pressure oil and gas media; 4) Welding with pressure Plugging technology, the high-pressure nut is directly welded to the leakage point of the process pipeline, then the screw is screwed into the nut and the joint between the screw and the nut is welded to death, and the redundant part of the screw is sawed off on site. This technology uses simple materials, but construction The operation is inconvenient and the plugging time is long, which is only limited to the relatively small leakage point of the pipeline and the low pressure condition

For this reason, part of the existing plugging technology limits its popularization and application on medium and high pressure pipelines due to the scope of application of the technology itself, and the other part cannot meet the requirements of rapid plugging on site due to the complexity of the plugging process.

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