Manufacturing process of special polyethylene lined oil pipe

Abstract

The invention discloses a special polyethylene lining oil pipe manufacturing process. The process includes: A, demounting and cleaning non-anticorrosion oil well connection pipe components in nonuse states, and subjecting a non-operation portion of an internal screw thread of a pipe hoop to corrosion prevention; B, reducing the external diameter of a polyethylene lining pipe to a size enabling the outer wall of the polyethylene lining pipe to be in clearance fit with the inner wall of an oil pipe, penetrating the polyethylene lining pipe through the oil pipe, and sleeving annular steel rings and marking reference lines on the peripheral walls of two orifices, extending outside a cavity of the oil pipe, of the polyethylene lining pipe; subjecting the polyethylene lining pipe to necking and bulging; C, respectively moving the angular steel rings towards the oil pipe; cutting sections, close to the orifices of the polyethylene lining pipe before cutting, of two ends of the polyethylene lining pipe; cleaning the cut to-be-flanged orifices of the polyethylene lining pipe; flanging the to-be-flanged orifices, and embedding the annular steel rings into the peripheral walls of the flanged orifices; cleaning the flanged orifices of the to-be-flanged orifices; D, applying screw thread oil onto an external screw thread at one end of the oil pipe, tightly screwing the pipe hoop onto the outer wall of one end of the oil pipe to enable the pipe hoop to be fixed relative to the oil pipe, wherein the internal screw thread at one end of the pipe hoop is cleaned and can be fittingly connected with the external screw thread at one end of the oil pipe. The special polyethylene lining oil pipe manufacturing process is more reasonable.

Description

technical field [0001] The invention relates to a processing method of an anti-eccentric anti-corrosion anti-corrosion lined oil pipe, in particular to a manufacturing process of a special polyethylene lined oil pipe. Background technique [0002] The process flow of the conventional polyethylene-lined oil pipe manufacturing method is still unreasonable and needs to be further improved. The produced polyethylene-lined oil pipe has poor partial wear resistance and anti-corrosion performance, and the working life is not long. Contents of the invention [0003] The purpose of the present invention is to provide a manufacturing process for special polyethylene-lined oil pipes. Better grinding performance and longer working life. [0004] The purpose of the present invention is achieved like this: a kind of manufacturing process of special polyethylene lining oil pipe, A, the length that makes modified ultra-high molecular weight polyethylene generate molding by composite co-e...

AI Technical Summary

Problems solved by technology

[0002] The production process of the existing ordinary polyethylene-lined oil pipe is still unreasonable and needs to be further improved. The produced polyethylene-lined oil pipe has poor anti-eccentric wear and anti-corrosion performance, and the working life is not long.

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