The rod used in petroleum drilling tools to connect drill bits and transmit power. The common components of a drill string are: drill bit, drill collar, drill pipe, stabilizer, special joint, and square drill pipe. In oilfield drilling engineering, petroleum drill pipes are the main components that connect the ground rotation system, lifting system, circulation system, drill collars, and drill bits. Through them, the rotary table drives the drill bit to rotate, the hook drives the drill bit to rise and fall, and the mud is sent to the bottom of the well to form a circulation, thereby achieving the breaking of rock layers by the drill bit and continuous drilling.

The basic functions of petroleum drill pipes are:

(1) Pulling off the drill bit: (2) Applying drilling pressure: (3) Transferring power; (4) Transport drilling fluid: (5) Perform special operations; Squeezing cement, handling underground accidents, etc.

Petroleum drill pipes are mainly suitable for the construction of deep wells, horizontal wells, and extended reach wells in the process of oil and gas exploration and development.

Petroleum drill pipe is a steel pipe with threaded threads at the end, used to connect the surface equipment of the drilling rig to the drilling and grinding equipment or bottom hole device located at the bottom of the drilling rig. The purpose of the drill pipe is to transport drilling mud to the drill bit and raise, lower, or rotate the bottom hole device together with the drill bit. The drill pipe must be able to withstand significant internal and external pressure, twisting, bending, and vibration. In the process of oil and gas extraction and extraction, drill pipes can be used multiple times.