一种封堵防漏剂及其制备方法和应用
By compounding gelling agents and crosslinking agents to form high-temperature resistant long-chain polymer hydrogels, the problem of poor sealing effect of existing leak-proof agents under high temperature and high pressure is solved, achieving high-strength sealing and high-elasticity recovery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA NAT PETROLEUM CORP
- Filing Date
- 2023-07-21
- Publication Date
- 2026-07-17
AI Technical Summary
Existing leak-proof agents are prone to degradation and failure under high temperature and high pressure conditions, and cannot effectively seal deep fractured formations. Furthermore, they lack elasticity and pressure-bearing capacity.
By compounding a first gelling agent, a second gelling agent, a first crosslinking agent, a second crosslinking agent, a pH adjuster, an initiator, and water, a high-temperature resistant long-chain polymer hydrogel is formed, and the network structure is optimized to improve the temperature resistance and elasticity of the sealing and leak-proof agent.
Under ultra-high temperature and ultra-high pressure conditions, the sealing and leak-proof agent can seal cracks with high strength, with an elastic recovery rate of ≥92.5% and a pressure bearing capacity of ≥6MPa for 5mm cracks, making it suitable for sealing ultra-deep formations.