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引言随着石油消耗量的增多,油田所用的钻杆上油管和套管也越来越多。钻杆杆壁较厚,钻进时承受扭矩,其外径为60～168毫米,壁厚为4.8～11毫米。上油管壁薄,用来提油,固定于油井中。外径为27～114毫米,壁厚为3～8毫米。套管用作油井的衬套,直径较大,当壁厚为7.4～14毫米时,直径为127～273毫米。油管端部的加工由于油井很深,钻杆长度往往达到数千米,它由7.5～15米长的钻杆连接起来,故连接处必须尽可能简单而且完全密封。这是通过
INTRODUCTION As oil consumption has increased, more and more tubing and casing have been used on the drill pipe for oil fields. Drill rod wall thicker, boring torque, the outer diameter of 60 to 168 mm, the wall thickness of 4.8 to 11 mm. Oil pipe wall thin, used to mention oil, fixed in the well. Outer diameter of 27 to 114 mm, wall thickness of 3 to 8 mm. Sleeves are used as bushings for oil wells, with larger diameters. When the wall thickness is 7.4 to 14 mm, the diameter is 127 to 273 mm. Because the well is so deep that the length of the drill pipe often reaches several kilometers, it is connected by drill pipes of 7.5 to 15 meters in length, so the connections must be as simple and completely sealed as possible. This is by