Spiral stabilizer is the essential part of drilling tools for packed hole, balancing, increase stabilization and decrease slant in the process of dri

Partial axle joint is a new type of anti-inclined tools, this joint determine the placement according the hole conditions, Its main effect is to make

Lifting nipple is used as connecting the pipe string such as shoulder-less drill collars, which is made of high-strength structural alloy steel after

Crossover joint is one of the most important part the drill string, which act as connection, conversion and transmission torque in drilling tools wit