Friction welding repair process for waste pipes

A pipe friction and friction welding technology, which is applied in the direction of manufacturing tools, welding equipment, tubular objects, etc., can solve the problems of low repair rate and waste of resources for waste pipes, and achieve the effect of promoting circular economy, reducing resource waste, and improving repair rate

Inactive Publication Date: 2013-01-02
NORTHEAST GASOLINEEUM UNIV +1
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Problems solved by technology

[0003] In order to solve the problem of low repair rate of waste pipelines in existing oilfields and w

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  • Friction welding repair process for waste pipes

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[0015] The invention will be further explained below in conjunction with the drawings:

[0016] This process uses oilfield waste pipelines as raw materials, and uses friction welding technology to weld short pipes into standard pipes that can be used again, while maintaining the good mechanical properties of the original pipes. The specific process includes pre-treatment, friction welding and Follow-up process;

[0017] The pre-treatment process includes the following steps: cleaning→rough selection→sandblasting→shot blasting→straightening→flaw detection→tightening→end thread inspection→pressure test→cutting off the worn tube body. The above process is the pre-treatment process of friction welding. Among them, cleaning, sand blasting and shot blasting can effectively deal with the oil, rust and scale on the inner and outer surfaces of the pipeline. Rough selection, flaw detection and pressure test can detect pipeline defects and leave aside For pipe bodies that meet welding requir...

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Abstract

The invention relates to a friction welding repair process for waste pipes of discarded pipes used in oilfield gathering and transportation pipe networks. The process mainly solves the problem of resource wasting caused by the low repair rate of existing oilfield waste pipes. The process comprises a preceding treatment procedure, a friction welding procedure and a subsequent treatment procedure, wherein the friction welding procedure comprises the steps of loading of pipe workpieces, clamping of workpieces, fast advancing of a sliding table, rotating of a hollow main shaft, upsetting and pressure maintaining, rotating of a clamp and moving of the clamp to release pipes. According to the process, waste pipes of oilfields serve as raw materials, and the process has the advantages of being reliable in quality of welding joints, high in production efficiency, large in welding repair range of pipes and low in production cost.

Description

technical field [0001] The invention relates to a repair method for scrapped pipelines used in oil field gathering and transportation pipeline networks, in particular to a friction welding repair process for waste pipelines. Background technique [0002] With the prolongation of oil extraction time, the pipelines used in a large number of long-term gathering pipeline networks are partially corroded or worn. Although some corresponding descaling and repair techniques are adopted, the repair rate is relatively low. According to incomplete statistics, more than 200,000 tons of discarded pipelines are discarded every year in onshore oil fields across the country, and the number of discarded pipelines continues to rise as the mining life continues to increase. In order to reduce production costs, a few were used for other purposes in the past, and most of them were sent to the waste station for treatment by returning to the furnace for smelting. This treatment method, for oil pi...

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Application Information

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IPC IPC(8): B23K20/12B23K101/06
Inventor 李福军夏惠芬孙岩高春波张志刚
Owner NORTHEAST GASOLINEEUM UNIV
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