一种实现过厚泥岩层进行区域水力压裂的方法及设备
By using drill pipe washing technology and mud pump flushing, the problems of hole blockage and hole collapse when drilling into thick mudstone layers were solved, improving drilling efficiency and the success rate of hydraulic fracturing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CCTEG COAL MINING RES INST
- Filing Date
- 2023-09-22
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies suffer from problems such as hole blockage, hole collapse, and stuck drill when drilling through thick mudstone layers, leading to borehole scrapping and low construction efficiency, especially in horizontal boreholes or boreholes with small inclination angles where effective construction is difficult.
The technique of flushing drill rods is adopted. The drill rods of the drilling rig are replaced with flushing drill rods. The flushing drill rods are lowered to the screw motor position connected to the drilling rods. The borehole is flushed with mud pumps, and the drill is rotated until the mudstone layer is drilled out. Hydraulic fracturing is then carried out in sections.
It improved the drilling efficiency of kilometer-long directional drilling rigs, avoided repeated casing installation and grouting in stages, overcame the difficulty of slag removal in pneumatic drilling, and achieved stable drilling and hydraulic fracturing.
Smart Images
Figure CN117468905B_ABST