一种内衬保温油管
By installing an expansion tube at the end of the inner lining of the insulated oil pipe and sealing it to the inner wall of the oil pipe body, the problem of reduced insulation performance caused by expansion tube failure is solved, resulting in a longer service life and better sealing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENGLI OILFIELD JINDA PETROLEUM TECH CO LTD
- Filing Date
- 2025-09-26
- Publication Date
- 2026-07-17
AI Technical Summary
In existing insulated oil pipes, after the expansion tube fails, the movement of the sucker rod causes oil to enter the insulation layer, resulting in the failure of the insulation performance.
Design a heat-insulated oil pipe with an expansion tube at the end of the inner lining. The expansion tube expands and seals against the inner wall of the oil pipe body. Combined with couplings and flanges, the sealing effect is enhanced to prevent the sucker rod from contacting the pipe.
It extends the service life of the insulated oil pipe, prevents liquid from entering the insulation layer and causing insulation failure, and improves sealing and corrosion resistance.
Smart Images
Figure CN224515137U_ABST
Abstract
Claims
1. A heat-insulated oil pipe, comprising an oil pipe body and an inner liner, the inner liner being fixedly inserted into the oil pipe body, and an insulation layer being provided within the annulus between the two; characterized in that: The end of the inner liner tube is provided with a cap for sealing the insulation layer. An expansion tube is provided inside the tube wall of the cap, and the outer wall of the cap is sealed and fitted to the inner wall of the oil pipe body after expansion through the expansion tube.
2. The heat-insulating oil pipe according to claim 1, characterized in that: The inner diameter of the end of the inner liner tube is the same as the inner diameter of the main body of the inner liner tube.
3. An internally lined heat insulated tubing as defined in claim 1, characterized in that: The expansion tube is made of metal.
4. An internally lined heat insulated oil pipe according to claim 1, characterized in that: It also includes a coupling, wherein a heat-insulating sealing ring is embedded in the middle of the inner wall of the coupling.
5. An internally insulated tubing string according to claim 4, characterised in that: The thermal insulation sealing ring is made of rubber or polyethylene.
6. An internally lined heat insulated oil pipe according to claim 4, characterized in that: The outer end of the end is provided with a flange for covering the end face of the oil pipe body. When the oil pipe body is connected with the coupling, the flange is pressed and sealed with the heat insulation sealing ring.