Failure Forms And Causes Of Drill Pipe Body-1

Failure Forms And Causes Of Drill Pipe Body

Failure of drill pipe is generally manifested as thread fracture, puncture failure, body fracture and puncture, etc. Drill pipe failure is often caused by irresistible internal factors, irregular operation, poor maintenance quality, failure to adjust the drill string combination in time according to the drilling process, failure to use thread sealant scientifically, poor use and storage, etc., which are often the result of the interaction of one or several of the above factors.

Failure forms of drill pipeDrill Pipe :

The failure forms of drill pipe are mainly divided into two categories: drill pipe thread failure and drill pipe body failure. The main failures of drill pipe threads are internal thread joint expansion, internal thread joint cracking, thread bonding, puncture, etc.; the main failures of drill pipe body are body puncture and fracture. Most of the failures of drill pipe body

occur 500mm below the joint, in the thickening transition area between the joint and the body. Only a few occur on the wear-resistant belt of the internal thread joint. Among the failures of drill pipe threads, fracture, puncture and bonding of the thread connection parts of the joint are the most common.