一种储气库注采井环空保护液加注装置
By designing an annular protective fluid injection device for gas storage injection and production wells, the problem of difficult injection under pressurized A-annulus conditions was solved, achieving precise injection, ensuring the integrity and safety of the well, and adapting to multi-well site construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2025-08-27
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing technology, under the condition of pressurized A annulus in the gas storage injection and production well, it is difficult to inject annulus protection fluid, which leads to leakage and corrosion. Moreover, the existing equipment is not effective and cannot effectively guarantee the integrity of the well.
A device for injecting annular protective fluid into injection and production wells of a gas storage facility was designed. The device includes an annular protective fluid injection inlet pipeline, a bypass pipeline, and a high-pressure venting pipeline. Combined with tank truck control valves and pressure gauges, the device achieves precise injection of annular protective fluid through venting and pressurization, thus avoiding corrosion and leakage.
It enables precise injection of annular protective fluid, reduces the labor intensity of workers, ensures well control safety, avoids casing and tubing corrosion, ensures the integrity of gas storage wells, and adapts to the construction needs of different well sites.
Smart Images
Figure CN224515168U_ABST
Abstract
Claims
1. A gas storage injection well annulus protection fluid filling device, characterized in that: The system includes the annulus of the injection and production wells, an annulus protection fluid injection pipeline, and a high-pressure venting pipeline. The annulus of the injection and production wells includes annulus A and annulus B. The annulus protection fluid injection pipeline and the high-pressure venting pipeline are both connected to annulus A. The inlet end of the annulus protection fluid injection pipeline is connected to a tank truck, and the outlet end of the high-pressure venting pipeline is connected to a blowout pool. The annulus protection fluid injection pipeline includes, in sequence, a No. 1 oil jacket pressure gauge, a No. 1 oil jacket side valve, a pump truck control valve, an annulus protection fluid pressurization device, and interconnecting pipelines. The tank truck control valve and tank truck pressure gauge are sequentially installed between the pipeline and the tank truck. A bypass line is also connected in parallel to the annular protective fluid injection inlet line, and a bypass control valve is installed on the bypass line; the inlet end of the bypass line is connected to the connecting line between the tank truck control valve and the annular protective fluid pressurization device, and its outlet end is connected to the connecting line between the pump truck control valve and the No. 1 oil jacket side wing valve.
2. The injection device of claim 1, wherein: The high-pressure venting pipeline includes oil jacket pressure gauge No. 2, oil jacket side valve No. 2, and corresponding connecting pipelines. Oil jacket pressure gauge No. 2 is located near annulus A and is positioned between annulus A and oil jacket side valve No.
2.
3. The injection device of claim 1, wherein: The annular protective fluid injection pipeline is connected to the tank truck's matching pipeline via an oil joint.
4. The injection device of claim 1, wherein: The annular protective fluid pressurization device is equipped with an overpressure return pipeline.
5. The injection device of claim 1, wherein: The tanker truck is equipped with a tanker truck level gauge on the side of the annular protective liquid tank.
6. The injection device of claim 1, wherein: A filter is installed at the inlet of the annular protective fluid pressurization device.
7. The injection device of claim 1, wherein: When the annulus A is pressurized, the pressure gauge of oil jacket No. 1 is greater than 0.1 MPa. First, open the high pressure venting line to release the pressure. The pressure in the annulus A drops to 0, and the pressure gauge of oil jacket No. 1 is equal to 0.1 MPa. The annulus protection fluid in the tank truck is injected into the annulus A through the bypass line.
8. The injection device of claim 1, wherein: When the annulus A is pressurized, the pressure gauge of oil jacket No. 1 is greater than 0.1 MPa. First, open the high-pressure venting line to release the pressure. The pressure in the annulus A cannot drop to 0. The pressure gauge of oil jacket No. 1 is still greater than 0.1 MPa. The annulus protection fluid in the tank truck enters the annulus A through the annulus protection fluid pressurization device. At this time, the high-pressure venting line is opened to control the outflow rate of the annulus protection fluid.