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A heat-insulating, heat-preserving and wear-resistant oil pipe for oil wells

A heat insulation and tubing technology, applied in the direction of pipes, drill pipes, casings, etc., can solve the problems of increased workload, shedding of semicircular heat insulation protection sleeves, etc., to increase wellhead temperature and prevent eccentric wear and corrosion Fouling effect

Active Publication Date: 2018-05-04
河北环亚石油钻采科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the wear-resistant and anti-corrosion outer-wrapped and heat-insulated tubing and the inner-lined and outer-wrapped tubing are connected, two butt-joint semicircular heat-insulated protection sleeves need to be installed and fixed on the outer wall of the tubing collar to provide protection when the tubing is run downhole. Increase the workload, when the tubing is pulled up during the pump inspection operation of the oil well, the semi-circular heat-insulating protective sleeve may fall off and cause the risk of downhole accidents

Method used

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  • A heat-insulating, heat-preserving and wear-resistant oil pipe for oil wells

Examples

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Embodiment 1

[0026] Embodiment 1: Taking the heat-insulated, heat-preserved and wear-resistant oil pipe with an outer diameter of 73 mm as an example, the heat-insulated, heat-preserved and wear-resistant oil pipe for oil wells is described.

[0027] See attached figure 1 . The present invention is a heat-insulating, heat-preserving and wear-resistant oil pipe for oil wells, comprising: 1. common oil pipe; 2. 35CrMo inner pipe; 3. heat insulation layer; 4. 35CrMo sealing sleeve; 5. 35CrMo sealing sleeve top; Set, 7. Oil pipe coupling, 8.35CrMo inner pipe outer wall top, 9. Ordinary oil pipe inner wall top.

[0028] Coating heat insulation layer 3 under constant temperature and constant pressure on the outer wall of 35CrMo inner pipe 2 having the same length as common oil pipe 1;

[0029] One end of the 35CrMo inner pipe 2 outer wall that has been coated with the heat insulation layer 3 is removed with the heat insulation layer 3 identical in length with the 35CrMo sealing sleeve 4;

[0...

Embodiment 2

[0039] Embodiment 2: Taking the heat-insulated, heat-preserved and wear-resistant oil pipe with an outer diameter of 89 mm as an example, the heat-insulated, heat-preserved and wear-resistant oil pipe for oil wells is described.

[0040] See attached figure 1 . The present invention is a heat-insulating, heat-preserving and wear-resistant oil pipe for oil wells, comprising: 1. common oil pipe; 2. 35CrMo inner pipe; 3. heat insulation layer; 4. 35CrMo sealing sleeve; 5. 35CrMo sealing sleeve top; Set, 7. Oil pipe coupling, 8.35CrMo inner pipe outer wall top, 9. Ordinary oil pipe inner wall top.

[0041] Coating heat insulation layer 3 under constant temperature and constant pressure on the outer wall of 35CrMo inner pipe 2 having the same length as common oil pipe 1;

[0042]One end of the 35CrMo inner pipe 2 outer wall that has been coated with the heat insulation layer 3 is removed with the heat insulation layer 3 identical in length with the 35CrMo sealing sleeve 4;

[00...

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Abstract

A heat insulation wear-resisting oil tube used for an oil well is applied in an oil well whose reservoir temperature is more than 75 DEG C, so as to improve wellhead temperature of the oil well. The heat insulation wear-resisting oil tube is characterized in that the heat insulation wear-resisting oil tube used for an oil well is formed by an ordinary oil tube, a 35CrMo inner tube, a thermal insulation layer, a 35CrMo seal cartridge, a PTEE gum cover, and a tubing coupling. The effects are that when the oil tube is applied in an oil well in reservoir temperature of more than 75 DEG C, wellhead temperature is increased to more than 15.5 DEG C, and eccentric wear and corrosion and scaling of an oil well rod are prevented, and average oil well pump inspection cycle is prolonged to more than 1.2 times.

Description

technical field [0001] The invention relates to the technical field of oil production engineering, in particular to a heat-insulating, heat-preserving and wear-resistant oil pipe for oil wells. It is used to increase the wellhead temperature of the oil well during the oil production process. Background technique [0002] In the process of oil field production, common oil pipes are often used for production. When the crude oil flowing out of the oil reservoir is lifted to the ground by the oil well pump, a large amount of heat is lost to the formation through the oil casing annulus, casing, and cement ring. On the one hand, the temperature of crude oil in the wellbore is lower than the waxing point, causing waxing in the oil well; In the process of oil collection, it needs to be transported with heat or mixed with water; moreover, with the increase of the number of deviated wells, the eccentric wear phenomenon is serious; in the later stage of oilfield development, high wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/00F16L9/18
CPCE21B17/00F16L9/18
Inventor 曹俊杰李国栋孙凤合
Owner 河北环亚石油钻采科技股份有限公司