The steel pipe and the round steel are made into drill rods after several steps of machining. First of all, through the middle frequency heating of the end of the pipe hydraulic upsetting, increase the tube end wall thickness, the next step, thread processing and proper treatment. The geological drill rod needs to connect the joint to the drill rod through the thread, and the oil drill rod is made of friction welding between the joint and the end of the rod.

The end of the drill pipe is heated by medium frequency and hydraulic upsetting, and after heat treatment, the internal stress in the early processing can be eliminated effectively.

The lock joint is made of 40Cr or 42CrMo material. After rough machining, quenching and tempering heat treatment, after finishing, surface nitriding treatment can effectively eliminate the problem of gluing and pulling, and is more wearable and easy to disassemble.

All the threads are formed on the CNC lathe with the molding blade to ensure the precision and the interchangeability.

The drill pipe is the tail of the steel pipe is provided with a threaded connection, for drill ground equipment and is located in the bottom of the drilling drilling and grinding equipment or bottom hole device. The drill pipe is the use of drilling mud transported to drill, and drill to improve, reduce or rotary hole device. The drill pipe must be able to withstand huge internal and external pressure, distortion, bending and vibration. In the process of oil and gas extraction and refining, the drill rod can be used many times.

Today we are mainly to understand the use of drill rods.

For the first time in the use of drilling, should "wear new button", which contains the first cast thread of oil rig to the innovation of science and technology, and then tighten, open the buckle in domestic demand, with oil thread open again, so repeated three times, can avoid new wear and buckle.

Maintain a straight line pipe and on the ground under the ground as far as possible, so that we can avoid the threaded part side force and avoid unnecessary wear extremely depressed, and even jumped into the drill stem, pay attention to the rig anchoring to avoid stress in the construction of mobile is very important.

In the use of new drill pipe, drill bit should be determined before cutting (head screw thread protection) is also close to a bad buckle new head easily damaged new pipe caused widespread losses, Water Leakage, buckle and loose state.

Due to the increasing difficulty of exploration and production of oil and natural gas, the performance requirements of drill pipes are higher and higher, such as deep wells, horizontal wells, extended reach wells, sulfur bearing environment and low temperature environment.