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Production method of ultra-high molecular weight polyethylene composite oil pipe

A technology of ultra-high molecular weight, composite tubing, applied in the field of ultra-high molecular weight polyethylene composite tubing production technology and production system, can solve the problems of poor adhesion between ultra-high molecular weight polyethylene materials and steel pipes, finished product quality and quality stability Poor consistency, complex processing procedures, etc., to achieve the effects of reduced control and operation difficulty, good memory, and interchangeability

Active Publication Date: 2016-03-30
王庆昭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The processing technology adopted has always been the traditional process of heating and melting the plastic to be lined to a fluid state before injection molding. However, the traditional injection molding method is used for steel lining molding. Among them, the steel surface treatment process is complicated and the processing requirements are high, and the injection molding process needs to be prepared in advance. Making molds requires cumbersome process steps such as demoulding after molding, which to a certain extent results in poor product quality and quality stability and consistency, and even poor adhesion between ultra-high molecular weight polyethylene materials and steel pipes, peeling of the inner lining, Phenomena such as looseness, and the manufacturing cost of the product is high and many other deficiencies

Method used

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  • Production method of ultra-high molecular weight polyethylene composite oil pipe
  • Production method of ultra-high molecular weight polyethylene composite oil pipe

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Experimental program
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Effect test

Embodiment 1

[0059] The inner diameter of the ultra-high molecular weight polyethylene lined pipe is 53±0.5mm, the outer diameter is 65±0.2mm, and the wall thickness is 3.4~3.7mm;

[0060] The outer diameter of the steel pipe is 75±0.2mm, the diameter of the pipe gauge is 51mm, the length of the gauge is 1200mm, and the minimum length of the coupling is 158mm.

[0061] In this embodiment, after the ultra-high molecular weight polyethylene lined pipe is combined with the steel pipe, before the parts protruding from the steel pipe at both ends of the lined pipe are flanged through the flanging device, the liner pipe needs to be pulled out from the steel pipe. The pull-out force is greater than 10KN.

Embodiment 2

[0063] The inner diameter of ultra-high molecular weight polyethylene lined pipe is 67±0.5mm, the outer diameter is 79±0.2mm, and the wall thickness is 4.2~4.5mm;

[0064] The outer diameter of the steel pipe is 89±0.2mm, the diameter of the drift gauge is 51mm, the length of the drift gauge is 1200mm, and the minimum length of the coupling is 171mm.

[0065] In this embodiment, after the ultra-high molecular weight polyethylene lined pipe is combined with the steel pipe, before the parts protruding from the steel pipe at both ends of the lined pipe are flanged through the flanging device, the liner pipe needs to be pulled out from the steel pipe. The pull-out force is greater than 12KN.

Embodiment 3

[0067] The inner diameter of ultra-high molecular weight polyethylene lined pipe is 90±0.5mm, the outer diameter is 105±0.2mm, and the wall thickness is 4.7~5.3mm;

[0068] The outer diameter of the steel pipe is 119±0.2mm, the diameter of the drift gauge is 86mm, the length of the drift gauge is 1200mm, and the minimum length of the coupling is 186mm.

[0069] In this embodiment, after the ultra-high molecular weight polyethylene lined pipe is combined with the steel pipe, before the parts protruding from the steel pipe at both ends of the lined pipe are flanged through the flanging device, the liner pipe needs to be pulled out from the steel pipe. The pull-out force is greater than 14KN.

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Abstract

The invention discloses a production method and a production system of an ultrahigh molecular weight polyethylene compound oil pipe. The method utilizes the memory property of the ultrahigh molecular weight polyethylene material and a special composite technology: conducting hole shrinkage treatment on an ultrahigh molecular weight polyethylene lining pipe with outer diameter larger than the inner diameter of a steel pipe, sheathing in the steel pipe, heating to restore inner diameter of the ultrahigh molecular weight polyethylene lining pipe, and forming the lining pipe with the steel pipe into an integral structure to reach a compactness and firmness without layering and stripping. By introducing additives, the invention greatly improves liquidity of the ultrahigh molecular weight polyethylene in order to produce the inner lining pipe with small wall thickness and reduce cost. The ultrahigh molecular weight polyethylene compound oil pipe provided by the invention comprehensively reserves specific superior performances of good memory property, high impact resistance, good temperature resistance, wear resistance, corrosion resistance, wax precipitation and fouling resistance of ultrahigh molecular weight polyethylene pipe. The invention also discloses a production system supporting the production method.

Description

technical field [0001] The invention relates to a production method and a production system of a composite oil pipe, in particular to a production process and a production system of an ultra-high molecular weight polyethylene composite oil pipe. Background technique [0002] As an important consumable in the field of petroleum and natural gas exploration and development, oil well pipe occupies an important position in the petroleum industry. It mainly includes drill string components, such as drill pipe, kelly, drill collar, casing and oil pipe, etc. At present, my country consumes more than 2 million tons of oil well pipes every year, of which the consumption of oil pipes is about 500,000 tons. [0003] In the prior art, steel oil pipes are generally used, and their service life and replacement cycle are short, mainly due to wear and corrosion during use. Among them, the wear is mainly manifested as eccentric wear, which is easy to aggravate the electrochemical corrosion o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D23/00
Inventor 王庆昭
Owner 王庆昭
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