The rig is a metal truss with a certain height and span, which is an important part of drilling equipment. It is divided into six main parts (can increase or decrease these structural parts according to actual needs) : crane, tower body, two-storey platform, lifting tower, auxiliary leg, chassis (base). In the drilling process, the rig is used to place and suspend the lifting system and bear the weight of the drill tool. The storage of drill pipe or drill collar, etc., must have sufficient carrying capacity, strength, stiffness, overall stability and necessary operating space.