A constant pressure discharge device and method suitable for downhole injection of dispersed system
By designing a constant-pressure exhaust device and utilizing the pressure changes during the gas injection process, the problem of solid-phase particle blockage during the downhole injection of the water-gas dispersion system was solved, the effective cleaning and normal operation of the device were achieved, and the injection effect of the dispersion system was ensured.
Patent Information
- Application Number
- CN202111636626.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-12-29
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2041-12-29
AI Technical Summary
During the downhole injection process of the water-gas dispersion system, solid particles in the injection string clog the micropore structure of the dispersion device, resulting in increased injection pressure and device failure. Existing technologies cannot effectively solve this problem.
A constant-pressure discharge device is designed. By utilizing the pressure change during the gas injection process, the selective piston and the eccentric piston cooperate to discharge solid particles at low pressure and form microbubbles that enter the formation at high pressure. The device includes an integral structural block, a spring, a one-way plug, a selective piston and an eccentric piston.
The solid phase particles in the pipe column are cleaned in time during each gas injection cycle to avoid blockage and ensure the normal operation of the dispersion system generating device. The device has a simple structure and is easy to install and operate.