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Polyketone lining pipe, polyketone lining composite oil pipe and preparation method thereof

A technology of composite oil pipe and liner pipe, which is applied in the direction of pipes/pipe joints/fittings, pipes, rigid pipes, etc., can solve problems such as complex corrosive media, achieve major economic and social benefits, improve mechanical properties, and have huge market prospects Effect

Pending Publication Date: 2018-04-20
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the exploitation of oil and gas resources, the corrosive media that oil pipes come into contact with are more complicated, including crude oil, water, oxygen, H 2 S, CO 2 And salts, etc., and its resistance to these media has not been reported

Method used

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  • Polyketone lining pipe, polyketone lining composite oil pipe and preparation method thereof
  • Polyketone lining pipe, polyketone lining composite oil pipe and preparation method thereof

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preparation example Construction

[0051] According to yet another aspect of the present invention, the present invention provides a kind of preparation method of polyketone-lined composite oil pipe, comprises the steps:

[0052] (1) The polyketone material, antioxidant and plasticizer are melted and extruded, and cooled to obtain a polyketone lined pipe 1 .

[0053] 97.8-99.95 parts by weight of polyketone material, 0.05-0.2 parts by weight of antioxidant and 0-2 parts by weight of plasticizer are uniformly mixed, melted and extruded by a single-screw extruder, and cooled.

[0054] Among them, the polyketone material is one of M630A, M730R, and M710U, and the antioxidant is a hindered phenol antioxidant or a phosphite antioxidant, wherein the hindered phenol antioxidant is preferably antioxidant 1010, antioxidant Agent 1790; the phosphite antioxidant is preferably antioxidant 168, and the plasticizer is one of di-n-octyl phthalate, di-isodecyl phthalate, and di-iso-octyl phthalate kind.

[0055] Among them, ...

Embodiment 1

[0065] Add 9.78 kg of polyketone M630A matrix, 0.02 kg of antioxidant 1010, and 0.2 kg of di-n-octyl phthalate into a single-screw extruder for melt extrusion molding. The temperature of the feed section is 180 ° C, and the compression section The temperature is 210°C, the homogenization section temperature is 230°C, the discharge section temperature is 220°C, and the die head temperature is 200°C. Cool after extrusion to obtain a polyketone-lined pipe with a length of 10.2 meters, an outer diameter of 61.2 mm and a thickness of 3 mm. Take a steel pipe with an inner diameter of 61 mm and a length of 10 meters, pull the polyketone lined pipe into the steel pipe, and place it for 24 hours to make the inner liner fit with the steel pipe. Stand at 90°C for 3 hours. After heating and softening both ends of the polyketone lined pipe, use a flanging machine to flang, and then trim the ends after flanging.

[0066] In addition, the prepared polyketone lined pipe was tested for corro...

Embodiment 2

[0068] Add 11.994 kg of polyketone M730R matrix and 0.006 kg of antioxidant 168 into a single-screw extruder for melt extrusion molding. The material section temperature is 240°C, and the die head temperature is 220°C. Cool after extrusion to obtain a polyketone-lined pipe with a length of 10.2 meters, an outer diameter of 61.2 meters and a thickness of 4 millimeters. Take a steel pipe with an inner diameter of 61 mm and a length of 10 meters, pull the polyketone lined pipe into the steel pipe, and place it for 24 hours to make the inner liner fit with the steel pipe. Stand at a temperature of 110° C. for 2 hours. After heating and softening both ends of the lining pipe, use a flanging machine to flang, and then trim the ends after flanging.

[0069] In addition, the prepared polyketone lined pipe was tested for corrosion resistance under the following conditions: temperature 140 °C, total pressure 10 MPa, H 2 S partial pressure 0.77MPa, CO 2 The partial pressure is 1.98MP...

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Abstract

The invention relates to the technical field of plastic pipes, and mainly relates to a polyketone lining pipe, a polyketone lining composite oil pipe and a preparation method thereof. The polyketone lining pipe comprises 97.8-99.95 weight parts of polyketone material and 0.05-0.2 weight part of antioxidant, and preferentially, further comprises 0-2 weight parts of plasticizer. The polyketone lining composite oil pipe comprises the polyketone lining pipe and an oil pipe; and the polyketone lining pipe is positioned in the oil pipe, and is flanged in the radial direction of the oil pipe in a pipe orifice of the oil pipe. In addition, the invention further discloses the preparation method of the polyketone lining composite oil pipe; and the preparation method comprises the following steps: (1) the polyketone material, the antioxidant and the plasticizer are molten, extruded and cooled to prepare the polyketone lining pipe; (2) the polyketone lining pipe is towed into the oil pipe; and (3)the two ends of the polyeketone lining pipe are softened by heating for flanging and finishing. The polyketone lining pipe achieves great economical and social benefits and huge market prospect.

Description

technical field [0001] The invention relates to the technical field of plastic pipes, and mainly relates to a polyketone-lined pipe, a polyketone-lined composite oil pipe and a preparation method thereof. Background technique [0002] With the deepening of oil and gas field development, more and more high-temperature, high-H content 2 S, CO 2 , Cl - When oil and gas wells are developed, the harsh corrosion environment makes the corrosion of oil pipes more and more serious, and the damage caused by corrosion becomes more and more prominent. [0003] Non-metallic lined composite pipes are increasingly widely used due to their excellent anti-corrosion properties. Currently the most widely used polyethylene-lined composite pipe has good corrosion resistance, good processing performance and internal penetration performance, but the service temperature usually does not exceed 100 °C. In order to further increase the service temperature, cross-linked polyethylene (CN 10550849 A...

Claims

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Application Information

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IPC IPC(8): F16L9/147F16L58/10B29C69/00C08K5/12C08K5/134C08K5/526
CPCF16L9/147F16L58/1036C08K5/12C08K5/1345C08K5/526B29C69/008C08L73/00
Inventor 张志宏孙海礁郭玉洁刘强马清杰韩阳赵毅曾文广陈晓华陈朝张江江罗攀登
Owner CHINA PETROLEUM & CHEM CORP