Novel dual metal composite pipes and preparation method

A bimetallic composite pipe and a manufacturing method are applied in the field of steel pipe manufacturing to achieve the effects of excellent corrosion resistance, excellent mechanical and mechanical properties, and cost saving

Active Publication Date: 2009-10-14
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Make the bimetallic composite pipe have better corrosion resistance and reliability, solve the problem of threaded connection sealing when the bimetallic composite pipe is used and the welding problem of the ground pipeline, expand the application field of the bimetallic composite pipe, and save the cost of oilfield development

Method used

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  • Novel dual metal composite pipes and preparation method

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Effect test

Embodiment 1

[0026] Embodiment 1: see attached figure 1 . The material of the outer wall pipe 1 is 16Mn low alloy steel, the inner diameter of the outer wall pipe 1 is 152.3 mm, the thickness is 8 mm, and the length is 12000 mm. The material of the lining pipe 2 is 316L stainless steel, the outer diameter of the lining pipe 2 is 150 mm, the thickness is 3 mm, and the length is 12060 mm. The short joint 4 is made of 316L corrosion-resistant stainless steel. The inner diameter of the short joint 4 is 152.3 mm, the thickness is 11 mm, and the length is 80 mm.

[0027] The outer wall pipe 1 is covered with an inner liner pipe 2 . Both ends of the outer wall pipe 1 are welded with short joints 4 , there is a weld 3 between the outer wall pipe 1 and the short joint 4 , and the two ends of the inner liner pipe 2 are welded on the inner wall of the short joint 4 . Drill 3 through holes 6 with a diameter of 5 mm on the outer wall pipe 1 wall. The through hole 6 drilled on the wall of the outer ...

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Abstract

A new bimetallic composite pipe is used in the development of oil and gas fields. There is a lining pipe inside the outer wall pipe. Both ends of the outer wall pipe are welded with short joints, there is a weld between the outer wall pipe and the short joint, and the two ends of the inner liner pipe are welded on the inner wall of the short joint. At least one through hole with a diameter of 2-10 mm is drilled on the outer wall pipe wall. After the hydrostatic test, use electric welding to weld the through hole, that is, use electric welding to fill the through hole after the hydrostatic test. Both ends of the new bimetallic composite pipe are processed with threads or both ends are processed into welding grooves. The effect is: the outer wall pipe is made of carbon steel or low-alloy steel pipe as the base material, and the excellent mechanical properties and low-cost characteristics of carbon steel pipe or low-alloy steel pipe are used; mechanical properties. Thoroughly solve the problem of threaded coupling connection and sealing of existing bimetallic composite pipes and the problem of ground welding of bimetallic composite pipes, expand the application field of bimetallic composite pipes, and save the cost of oilfield development.

Description

technical field [0001] The invention belongs to the technical field of steel pipe manufacturing, and relates to a novel double-metal composite pipe structure used in the development of oil and gas fields and its manufacturing technology. Background technique [0002] The petroleum industry is an industry that uses a large number of pipes, and a large number of steel pipes are required in the development of oil and gas fields. In the process of oil and gas field development, it is inevitable to encounter 2 S, CO 2 , Cl and other media, these media are highly corrosive to the pipe. In the process of oil and gas field development, corrosion is a serious problem that exists from beginning to end. It not only causes huge economic losses, but also often brings some catastrophic consequences, such as: casualties, shutdown and environmental pollution. Corrosion has caused many accidents in the petroleum industry, and the annual economic loss is very large, so higher corrosion res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/02B32B1/08
Inventor 李为卫熊庆人霍春勇杨龙严密林
Owner BC P INC CHINA NAT PETROLEUM CORP
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