Brief introduction of Pup joints in drilling rig

The Pup joints in drilling rig is a part of the drill pipe assembly, which is used to connect the drill pipe and the drill bit, support and bear the torque and gravity of the drill pipe, and ensure the stability and efficiency of drilling.

What is the pup joints in drilling rig

A drilling rig is a kind of equipment used for geological exploration and oil extraction. Its main components include drilling rig derrick, drill pipe, drill bit, etc. The drill pipe is a very important component in the drilling rig. It is equivalent to a bridge connecting the drill bit and the frame. The drill pipe is composed of multiple components, including puppet. The puppet is a part of the drill pipe assembly, usually about 1.5 meters long, used to connect drill pipes of different lengths, support and bear the torque and gravity of the drill pipe, and ensure the stability and efficiency of drilling.

The role of the pup joints

During the drilling process, the torque and gravity of the drill pipe will be affected by the resistance of the formation solid and liquid and the topography and other factors. Therefore, a component is needed to ensure the stability and efficiency of the drill pipe to avoid affecting the normal progress of drilling work due to the deformation of the drill pipe. The role of the pup joint is to connect the drill pipe assembly, support and bear its torque and gravity, and ensure the stability and efficiency of drilling. In addition, the short section in the drill pipe assembly can also be used to detect the physical and chemical properties of the formation, improve the efficiency of exploration and mining, and reduce the risk of drilling.

Types of pup joints

There are two common pup joints in drilling rigs, one is a flat pup joint and the other is an internal threaded pup joint. Flat pup joints are usually used to connect non-threaded drill pipes, while internal threaded pup joints are used to connect threaded drill pipes. The connection methods of the two pup joints are different, so they should also be selected according to the specific situation.

Maintenance of pup joints

The pup joints in the drilling rig need to be maintained and maintained frequently to ensure their normal operation. When using the pup joint, attention should be paid to the sealing and stability of the drill pipe connection part, and the wear resistance and durability of the pup joint. In addition, the transfer and disassembly should be carried out in accordance with the regulations of the pup joint, and it should not be replaced or incomplete at will. If cracks, deformation or damage are found in the pup joint, it should be replaced in time.

Conclusion

As an indispensable component in the drilling rig, the performance of the pup joint has an important impact on the stability and efficiency of drilling. Therefore, special attention should be paid to the selection, use and maintenance of pup joints during drilling operations to ensure the normal progress of drilling work.