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Manufacturing method of aerogel heat-insulation oil pipe

A technology of thermal insulation oil pipe and manufacturing method, which is applied in the manufacture of aerogel thermal insulation oil pipe and the manufacturing field of aerogel thermal insulation oil pipe for heavy oil thermal recovery well, and can solve the problem that the low cost economic development of heavy oil thermal recovery cannot be satisfied. and other problems, to achieve the effect of wide application temperature and pressure range, reducing dependence on vacuum degree, and prolonging insulation life.

Inactive Publication Date: 2019-07-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increasingly complex forms of oilfield development and the increasing urgency of energy saving and efficiency improvement, higher requirements are put forward for the thermal insulation performance and service life of heat-insulated oil pipes. need

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 The manufacture method of airgel heat-insulated oil pipe

[0032] Below, the 9.6-meter standard heat-insulated oil pipe is taken as an example to further illustrate the manufacturing method of the present invention, but the scope of protection of the invention is not limited thereto.

[0033] 1. Material selection and blanking of heat insulation tube:

[0034] Step 1. Material selection and blanking of heat-insulated oil pipe: (1) Select the material of the outer pipe, inner pipe and coupling of the heat-insulated oil pipe. Re-inspect the mechanical properties of the pipe at room temperature and the chemical composition of the pipe, and the materials with incomplete original procedures or unqualified re-inspection are not allowed to be put into production, so as to ensure the quality of the pipe; (2) The outer pipe is longer than the inner pipe, according to the prestress design requirements , the length of the inner pipe is used to determine the length of t...

Embodiment 2

[0047] Embodiment 2 The manufacture method of airgel heat-insulated oil pipe

[0048] The difference with embodiment 1 is: the material of outer pipe, inner pipe and collar described in step 1 is N80 steel pipe;

[0049] Step 4. Heating and degassing: Put the heat insulation material, inner pipe and outer pipe into the heating furnace, heat it to 400°C, keep it warm for one hour, and then cool it to 75°C;

[0050] In step 5, wrapping the inner tube: Wrap the outer wall of the inner tube with a composite heat insulation material composed of 1 layer of airgel felt and 3 layers of non-alkali cloth.

[0051] Others are the same as embodiment 1.

Embodiment 3

[0052] Embodiment 3 The manufacture method of airgel heat-insulated oil pipe

[0053] The difference with embodiment 1 is: the material of outer pipe, inner pipe and collar described in step 1 is P110 steel pipe;

[0054] Step 4. Heating and degassing: Put the heat insulation material, inner tube and outer tube into the heating furnace, heat it to 440°C, keep it warm for one hour, and then cool it to 85°C;

[0055] In step 5, wrapping the inner tube: Wrap the outer wall of the inner tube with a composite heat insulation material consisting of 2 layers of airgel felt and 3 layers of inorganic glue.

[0056] Others are the same as embodiment 1.

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Abstract

The invention belongs to the technical field of oil and gas exploration, and particularly relates to a manufacturing method of an aerogel heat-insulation oil pipe. The manufacturing method comprises the following steps that 1, the heat-insulation oil pipe is subjected to material selecting and discharged; 2, an inner pipe is subjected to expanding and heading; 3, derusting by sandblast is conducted; 4, heating for degassing is conducted; 5, the inner pipe is bound through an aerogel composite heat-insulation material; 6, sleeving is conducted; 7, welding is conducted; 8, vacuumizing plug welding is assisted through heating; 9, a apparent heat conductivity coefficient is tested; 10, assembling and marking are conducted; and 11, detecting and packing are conducted. According to the manufacturing method, a pipe material, a heat-insulation material and a machining technology are all improved and tackle key problems, thus the stability of the heat-insulation performance of the heat-insulation oil pipe is greatly improved, the service life is prolonged, the cycle use cost of the heat-insulation pipe is lowered, the well condition requirements of various steam injection heat production wells can be met, the aerogel heat-insulation oil pipe is an upgraded and updated product of an existing heat-insulation oil pipe, and the technical gap of domestic and oversea aerogel in the wellbore heat insulation filed is filled up.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploitation, and in particular relates to a manufacturing method of an airgel heat-insulating oil pipe, in particular to a manufacturing method of an airgel heat-insulating oil pipe suitable for heavy oil thermal recovery wells. Background technique [0002] Steam injection thermal recovery is one of the most effective technical means for developing heavy oil reservoirs. In order to achieve good development results, apart from reservoir conditions, the key point is the quality of steam injected into the reservoir. Insulated tubing is an important piece of equipment in thermal recovery and development. Its purpose is to inject high-temperature and high-pressure steam downhole as a steam injection channel, reduce heat loss in the wellbore, improve the quality of steam injected into the bottom of the well, and protect the oil well casing and cement sheath at the same time. Free from thermal stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 郭雄华翟勇谢志勤张学超沈静赵晓红梁伟赵晓栾智勇刘冬青
Owner CHINA PETROLEUM & CHEM CORP