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Polyethylene composite material and application thereof in preparation of high-temperature-resistant lining oil pipe

A composite material and polyethylene technology, which is used in the preparation of high temperature resistant lined oil pipes, in the field of polyethylene composite materials, can solve problems such as unusability and high temperature resistance

Pending Publication Date: 2021-10-29
SHENGLI OILFIELD SHENGJI PETROLEUM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lining oil pipe material currently on the market is generally high-density polyethylene material. However, the existing technology HDPE high-density polyethylene lining has good anti-corrosion and anti-partial wear effects, but the biggest problem in use is that it is not resistant to High temperature, it can only be used in wells below 80 ℃, then for wells with a depth of less than 2500 meters, there will be a problem that the temperature is too high to be used

Method used

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  • Polyethylene composite material and application thereof in preparation of high-temperature-resistant lining oil pipe
  • Polyethylene composite material and application thereof in preparation of high-temperature-resistant lining oil pipe
  • Polyethylene composite material and application thereof in preparation of high-temperature-resistant lining oil pipe

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preparation example Construction

[0064] According to one aspect of the present invention, a kind of preparation method of above-mentioned polyethylene composite material, described preparation method comprises the following steps:

[0065] First, dilute the polymer coupling agent with an organic solvent to obtain solution A; then use solution A to modify the surface of the heat-resistant filler to obtain a surface-modified filler; then mix the raw materials including the surface-modified filler and dry , to obtain polyethylene composites.

[0066] The preparation method of the polyethylene composite material provided by the present invention, the preparation method first dilutes the polymer coupling agent with an organic solvent to obtain solution A; then uses solution A to modify the surface of the heat-resistant filler to obtain the surface modified Filler; then, the raw materials including the surface-modified filler are mixed and then dried to obtain a polyethylene composite material. The above preparati...

Embodiment 1～5

[0078] A polyethylene composite material, in parts by mass, said polyethylene composite material comprises the following components:

[0079]

[0080]

[0081] Among them, the ultra-high molecular weight polyethylene GK02 with a number-average molecular weight of 2.6-3.2 million; the high-density polyethylene DMDA-8008H with a number-average molecular weight of 250,000-400,000; Beads are processed from borosilicate raw materials, with a particle size of 10-250 microns and a wall thickness of 1-2 microns; silicon nitride (Si3N4) is in powder form, with a particle size of 10-18 nanometers; the main component of talc powder is hydrated Magnesium silicate, talc powder with a particle size of 2000 mesh obtained by crushing natural talc; polymer coupling agent selection silane coupling agent A-171 (vinyltrimethoxysilane); antioxidant selection BASF antioxidant Irganox1010 .

[0082] The preparation method of described polyethylene composite material, comprises the following s...

Embodiment 6～8

[0086] A polyethylene composite material, in parts by mass, said polyethylene composite material comprises the following components:

[0087]

[0088] Wherein, the number average molecular weight of the ultra-high molecular weight polyethylene in Example 8 is 2.4 million, and the number average molecular weight of the high-density polyethylene is 200,000.

[0089] The preparation method of the polyethylene composite material is the same as in Example 5.

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Abstract

The invention provides a polyethylene composite material and application thereof in preparation of a high-temperature-resistant lining oil pipe, and relates to the technical field of special pipes. The polyethylene composite material is mainly prepared from ultra-high molecular weight polyethylene, high-density polyethylene, a heat-resistant filler and auxiliaries, wherein the heat-resistant filler comprises hollow glass beads, silicon nitride, talcum powder and soft refractory clay; the auxiliaries comprise an antioxidant, a macromolecular coupling agent, magnesium stearate, PE wax and an organic solvent. According to the polyethylene composite material prepared by compatibility of the raw materials, all the raw materials achieve a synergistic compounding effect, and the polyethylene composite material has good temperature resistance and aging resistance, is stable in mechanical property and can cover basic characteristics of a conventional lining oil pipe product. Experiments verify that the composite material can resist high temperature of 150 DEG C effectively, and the technical requirements for use in a deep well oil extraction environment are fully met.

Description

Technical field [0001] The invention relates to the technical field of special pipes, and in particular to a polyethylene composite material and its application in preparing high-temperature resistant lined oil pipes. Background technique [0002] At present, as oil fields enter the later stage of development, eccentric wear and corrosion of oil pipes in production wells (eccentric wear, rod breakage, and pipe leakage) of oil production wells often occur, causing oil well production to stop and reduce production. Especially after oil production wells enter a period of extremely high water content, scrapped oil pipes due to eccentric wear of rods and tubes account for more than 1 / 6 of the annual oil pipe usage, resulting in huge waste of resources and increased production costs. Using lined oil pipes can effectively solve this problem. [0003] The lined oil pipe has the characteristics of anti-corrosion, anti-wear, small resistance coefficient, and temperature resistance. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K7/28C08K3/34C08K5/098C08K5/134C08K9/06
CPCC08L23/06C08L2207/068C08L2207/062C08L2201/08C08L2203/18C08L2205/025C08K7/28C08K3/34C08K3/346C08K5/098C08K5/1345C08K9/06
Inventor 张端光高飞刘玉杨张玉河金波马志博王泽新杨学峰闫金鹏
Owner SHENGLI OILFIELD SHENGJI PETROLEUM EQUIP
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