Design and Research on the Drilling and Lifting Device of Coalbed Methane Drilling Machine

Abstract

In response to the problems of complex operation procedures, long auxiliary time, and impact on drilling efficiency in coalbed methane drilling construction, a fast tripping and lifting device for coalbed methane drilling rig is designed. The device has a compact and reasonable structure, and strong process adaptability; The structure of clamping with a wedge-shaped groove and releasing the basket is used. In the drilling operation of the drill-ing rig, the drilling rod is clamped with a lifting device instead of a threaded connection, and the lifting and lowering of the drilling rod is completed with the help of a rotator. The operation is simple, reducing auxiliary time and improving drilling efficiency. Simultaneously using a self sealing floating core tube structure and hydraulic pressurization, the sealing between the lift-ing device and the drilling tool can be achieved. During drilling operations, mud can be directly introduced for drilling, improving the ability to handle drilling accidents.