What are the differences between oil casing and drill pipe

First, what are the differences between oil casing and drill pipe?
1. Oil casing and drill pipe have different uses.
2. Oil casing and drill pipe are made of different materials.

Oil casing is a steel pipe used to support the wellbore of oil and gas wells, ensuring the smooth operation of the well during drilling and after completion. Depending on the drilling depth and geological conditions, several layers of oil casing are used in each well. After being run into the well, the oil casing is cemented. Unlike tubing and drill pipe, it cannot be reused and is a disposable material. Therefore, oil casing accounts for more than 70% of the total tubing used in oil wells.

Second, what are the drilling equipment components?
Oil casing can be classified according to its use: guide casing, surface casing, technical casing, and reservoir casing.
Drilling tools are connecting rods used to transmit power.
A typical drill string consists of: drill bit, drill collars, drill pipe, stabilizer, special connectors, and angular drill pipe.
The basic functions of the drill string are:
(1) tripping the drill bit;
(2) applying drilling pressure;
(3) transmitting power;
(4) delivering drilling fluid;
(5) performing special operations: cementing, handling downhole accidents, etc.

API standard E75 to S135 steel grades, a series of oil drill pipes with outer diameters from 2 3/8″ to 6 5/8″, as well as double-shoulder joint drill pipes with high torsional resistance and BNK C95S drill pipes of special steel grades for sulfur-containing oil wells. These are mainly suitable for the construction of deep wells, horizontal wells, and extended reach wells in oil and gas exploration and development.