The largest amount of a pipe that used for oil and gas exploration is seamless oil casing pipe. It relies on male and female buckle which is screwed inside and outside and a series deep underground steel pipe work. is the lifeline of its quality directly affects the success of drilling operations and the service life of oil and gas wells, related to the oil fields and the manufacturer’s economic benefits.
In the planning stages of a well a drilling engineer, usually with input from geologists and others, will pick strategic depths at which the hole will need to be cased in order for drilling to reach the desired total depth. This decision is often based on subsurface data such as formation pressures, strengths, and makeup, and is balanced against the cost objectives and desired drilling strategy.
Seamless oil casing pipe failure is one of the main problems encountered for each oil field, particularly among the most serious failure of the threaded joint. According to statistics, the oil casing failure occurs in about 64% of accidents threaded connections, the domestic this figure is as high as 86%, securing oil casing threaded joints are the weak link in the oil casing string, therefore, increase the thread connection quality is a key factor in ensuring the quality of the column. Oil casing threaded connections used in the stress distribution directly determines the strength of the connection string.