164 / 2013-03-25 13:26:08

Design And Control Technology Of The Directional Drilling Trajectory In Coal Mine

Technical advantage of directional drilling in coal mine is the drilling trajectory controllability, which key technology is the drilling trajectory design and control technology. Researching the algorithm of directional drilling trajectory in coal mine, it derives drilling trajectory design parameters, and systematically summarizes the criteria of drilling trajectory design parameters in accordance with the drilling design steps, which guides the drilling trajectory design. The tool face orientation of screw drill is major factors to change the drilling trajectory by studying the law of directional drilling whipstock. Combined with Formation hardness, gravity and other factors affect the drilling whipstock, it comes to the technology of forecast drilling trajectory by tool face orientation. According to the law of directional drilling whipstock and construction experience, it summarizes the tool face orientation combinations to meet different drilling trajectory control demand. It need to constantly verify and optimize drilling design trajectory by the actual drilling data when controlling drilling trajectory, which to ensure that the drilling trajectory control in the target area.