·Improving drill pipe slip crushing capability. Take 5" 19.50lb/ft G105 for example, the drill pipe crushing capability increased by 140%;
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·Fatigue test proved that, because of slip injury, the fatigue life of ordinary drill pipe decreased by 60%. The fatigue life of slip-proof drill pipe (slip crush protest drill pipe) increased more than 5 times in the same slip injury condition.
(a)Size Range: 4", 4-1/2", 5", 5 1/2", 5 7/8", 6 5/8", 7 5/8";
(b)Steel Grade: G105, S135, HLDT-SH®Z140, HLDT-SH®V150;
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