To select suitable oil drill collar, we need to start with “drilling machine main body”.
The utility model has the advantages of fast drilling speed, good drilling shaping, high drilling efficiency, greater torque, stable operation, automatic locking of spring pins, and convenient and quick disassembly. When drilling deep hole, the drill pipe is equipped with a cotter pin to increase transmission torque and greatly reduce the loss of drill pipe. The plug thread connection is adopted for quick and easy disassembly and assembly, good sealing performance, high tensile strength and high pile quality. The verticality is good, easy to disassemble and install.
