Trenchless Technology of Drill hole Mud Motor and Roller Cone Bit applied in Rock

摘要

Trenchless Technology has become more sophisticated and widely used in many fields in recent years. But there are still some construction problems in different geological conditions especially in rock. Due to the complexity and particularity of rock, the trenchless construction technology applied to it is completely different from to soil. As well as there is not very perfect construction technology and methods still, which bring a big risk. Based on existing theoretical research, the characteristics of rock and the construction experience, this paper mainly discussed Drill hole Mud Motor and Roller Cone Bit applied to Trenchless Technology in Rock, the main contents are as follows: first of all, introduced the properties of Rock, and then discussed the working principle and the advantages of Drill hole Mud Motor and Roller Cone Bit which the key point was to make work together smoothly. Afterward to choose the drilling equipment to support them such as Mud Pump, Rig, Drilling Mud and other drilling tools. Finally, according to a project example, general construction problems and solutions were analyzed. For example how to control the construction time of pilot bore and drilling deviation; what we should pay more attention on the process of reaming, cleaning and towing pipe. It will provide some valuable references to the TT of similar nature.