On July 4th, the Baode Coal Mine Project Department of the Xi'an Research Institute Drilling Institute delivered a report, during the period of implementation of the horizontally oriented long borehole and the ground U-well group vertical well connection project of Baode Coal Mine of Shendong Company of National Energy Group. The high-power directional drilling equipment and mud pulse-type wireless while drilling system independently researched and developed by the institute, the horizontal horizontal directional long-hole drilling construction to the 1944m area and the vertical U-well group vertical wells successfully completed the docking connection, the first realization of the horizontal downhole drilling in the coal mine The hole is connected to the distal end of the vertical well.
In order to improve the drainage efficiency of the surface coalbed methane well group, and to solve the problems of high cost of drainage wells and high land acquisition cost, Baode Coal Mine entrusted Xi'an Research Institute to construct horizontal underground directional docking long boreholes. The project adopts ZDY12000LD drilling rig, mud pulse type wireless drilling while measuring system and supporting equipment independently developed by Xi'an Research Institute, and uses the coal mine underground composite directional drilling technology to construct Φ120mm along the 8# coal seam along the No. 2 return airway in Baode Coal Mine. Horizontally oriented long holes. During the implementation of the project, the on-site personnel overcome many technical problems such as high precision of the control of the docking hole trajectory, complicated geological conditions and easy to collapse the coal seam, and realize the successful docking connection with the ground U-well group Shenhuaping-01V well at 1544m.
The smooth implementation of this project once again proved the advanced nature of the high-power directional drilling technology and equipment developed by Xi'an Research Institute, and also verified the high efficiency of the coal mine underground composite directional drilling technology pioneered by Xi'an Research Institute. The successful docking of the underground drilling and the vertical wells made the original ground well group “open the new branches”, and realized the gas extraction from the single ground well group to the underground and the ground three-dimensional joint extraction, once again for the coal mine gas. Governance contributed to the wisdom of Xi'an Research Institute.
