Outer thickening oil casing properties
2020-03-25 14:07:00 HITS：
External upset of using cone tube round thread casing, through the joint upset, complete the coupling and sealing, is one of basic type of threads. Its tooth shape is a triangle, dome round bottom, tooth profile Angle 60 °, thread taper is 1:16, tooth profile Angle bisector with vertical axis. After the screw tightening, by inside and outside the interference fit sealing thread tooth flank, easy processing, cooperate with thread compound sealing, some cohesion strength, site maintenance and use of relatively simple. Outer thickening oil casing features:
1, through the joint upsetting to strengthen the cohesion strength.
Under the premise of without change the thread shape, joint after upsetting process make joint size increases, advances the cohesive strength, satisfy the request.
2, with thread compound to cooperate to complete the seal oil casing external upset addendum and tooth bottom clearance there is a 0.076 mm gap, make-up, the tooth tip clearance is filled with thread compound, thread compound curing after infarction leakage passage, and thus complete the sealing effect.
External upset casing in the history of the development of oil industry has an indelible contribution. With the development of the petroleum industry, the geological conditions of increasingly demanding, external upset oil casing thread to stop from time to time to qualify, comply with the request that special strata gradually.
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