Technical Research Of Drill Tubing Differentiate-to-The-Waste

Drill tubing are necessary and essential equipments of oil field development, which Composing an independent, closed work system to undertake a variety of injection and recovery tools by linking each other of internal and external screw thread and with other tools, in underground oil wells. Drill tubing repair is an important means of improving the utilization of the old drill tubing and reducing the cost of oil exploration . From the reason of leading to leakage from the oil tube.Besides the leskage loss of screw thread and the leakage lose caused by the reason of man,the side attrition is the major reason to make wall thickness reduction and lead loading-bearing capacity of the tube go down. the tube body deposed are key technologies of improving the secondary utilization of the old drill tubing. if use the visual method and thread gauge to determine whether is the scrapped drill tubing in accordance with API standard, there are a considerable portion of the drill tubing which although has beyond the API standard, there is still a considerable long useful life. As a result, bring about the tremendous waste of resources.This paper to study the tube body deposed of the drill tubing as the goal,By the statistics of oil tube failure to determine the side attrition of oil tube is the major study,To establish standards from Anti-pressure intensity of the remaining and The remaining fatigue life.Based on the above study, considering the API standard generally, this paper constituted the scrapped limit of the parameters of the drill tubing thread, which used for the detection standard of the new developed detection equipment for the drill tubing thread and used to guide the drill tubing restoration, improve the old drill tubing repair rate and reduce costs.