Thread failure of drilling tool joints refers to the occurrence of cracks, wear, fractures, and other issues on the threads of the drilling tool joints during drilling operations, which prevent the drilling tool from working properly and even affect the safety and efficiency of underground operations. There are various reasons for the failure of drilling tool joint threads, mainly including the following:
Firstly, improper operation. During the drilling operation, the operator failed to strictly follow the operating procedures and precautions, resulting in improper force or vibration on the drilling tool joints, which led to excessive stress on the threaded parts, resulting in cracks or fractures.
Secondly, corrosion erosion. In underground operations, drilling tool joints often come into contact with corrosive environments such as high temperature, high pressure, acid and alkali. Long term exposure to these harsh conditions can cause corrosion erosion on the surface of the drilling tool joint threads, leading to a decrease in thread strength and easy fracture.
Thirdly, wear and fatigue. Under high-speed rotation and repeated use, the threaded surface of the drilling tool joint will experience wear and fatigue, gradually losing its original delicate surface, leading to thread failure.
Fourth, improper material selection. Improper selection of material for drilling tool joints can also lead to thread failure. If the material lacks hardness, toughness, or contains too many impurities, it will affect the quality and performance of the thread, leading to the failure of the joint thread.
Fifth, design flaws. The scientific and reasonable design of drilling tool joints can also affect the durability of threads. If the design does not meet the requirements of the actual usage environment, it is easy to cause the thread to be in a state of excessive force or severe wear, accelerating the failure of the thread.
Therefore, the causes of thread failure in drilling tool joints are multifaceted. To prevent and solve this problem, it is necessary to first strengthen the training of operators to ensure strict implementation of operating procedures; Secondly, caution should be exercised in material selection and design, and attention should be paid to the prevention of corrosion and wear; Finally, regular inspection and maintenance of drilling tools should be carried out, and aging or damaged joints should be replaced in a timely manner to ensure the smooth progress of drilling operations.
