Fit the rig tongs with the correct jaws for the drill pipe tool joint or the drill collar. Re-install the safety lock springs.
给大钳装上与钻杆接头或钻铤相匹配的钳头，再装上安全锁簧。
Longitudinal crack of drill pipe box joint is brittle fracture at low stress.
钻杆接头的各种纵向开裂属于低应力脆性断裂。
When picking up drill pipe, visually check each joint of pipe picked up to be sure it is in proper sequence according to weight, grade and class as designed.
串接钻具时，要按照设计逐根检查，以便确认每个单根的重量、钢级和下井顺序正确无误。
The utility model relates to a combined flaw detection transporting device for a drill stem or a pipe joint, particularly a curved combined flaw detection transporting device.
本实用新型涉及钻杆或导管接头的探伤检验组合输送装置，尤其涉及曲线式探伤检验组合输送装置。
Due to the increasing number of deep Wells and directional Wells being drilled, longitudinal fracture occurred on the box-ended drill pipe tool joint is often reported.
近年来由于深井、定向井等逐渐增多，油气井钻井中钻杆内螺纹接头纵向开裂失效成为常发事故。
Due to the increasing number of deep Wells and directional Wells being drilled, longitudinal fracture occurred on the box-ended drill pipe tool joint is often reported.
近年来由于深井、定向井等逐渐增多，油气井钻井中钻杆内螺纹接头纵向开裂失效成为常发事故。
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