Precise classification and identification and targeted grouting plugging method for drill hole fractures
By using coarse and fine classification detection components to accurately classify borehole fractures, and combining this with tracer to identify through-type fractures, targeted grouting and sealing can be achieved. This solves the problem of poor sealing effect in existing technologies and improves the efficiency and safety of oil and gas extraction.
CN121519871APending Publication Date: 2026-02-13CHINA UNIV OF MINING & TECH
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Patent Information
- Application Number
- CN202511851089.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-10
- Publication Date
- 2026-02-13
AI Technical Summary
Technical Problem
Existing borehole fracture sealing technologies fail to accurately distinguish fracture types, resulting in poor sealing performance, which affects the efficiency and effectiveness of oil and gas extraction and increases construction costs.
Method used
Coarse and fine detection components are used to accurately classify and identify borehole fractures. Tracers such as SF6 and fluorescent tracers are used to identify through-type fractures, enabling targeted grouting and sealing.
Benefits of technology
It improves borehole sealing, increases oil and gas extraction efficiency, saves grouting materials and construction costs, and reduces the probability of safety accidents.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses an accurate classification and identification and targeted grouting plugging method for drill hole fractures. The method comprises the following steps: selecting three hole groups in bedding drill holes or crossing drill holes; searching cracks in the target drill hole by using an endoscope and numbering the cracks; preliminarily identifying the through condition of the three-hole group by adopting a rough sorting detection assembly; a subdivision detection assembly is assembled in the target drill hole, the capsule hole packer B and the capsule hole packer C are made to plug the two sides of the ith crack, a detection cavity is formed, and subdivision identification is conducted on the crack type in the target drill hole; all fractures in the target drill hole are identified and recorded; a retreating mode is adopted, a discharging opening of a grouting pipe is accurately aligned with each through type crack based on the identification and recording result, and targeted grouting plugging operation is conducted; and after the cement mortar is dried, gas in the coal seam is extracted. According to the method, accurate classification identification and targeted plugging can be carried out on fractures, efficient gas extraction operation can be achieved, and the probability of safety accidents can be reduced.
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