Description

Drill collar Feature: A. High precision in size and shape B. Good low temperature toughness C. Excellent comprehensive mechanical properties D. Reduce the torque of drilling string E. Good weld ablity with little splash and good rewelding preformance F. Friendly to environment Drill Collars OD ID Connections *1FT Collars Est. Weight (kg/pc) inch mm inch mm **1/8 **4.*8 2 **1/4 *0.*0 *7.*5 NC*1,NC*5 NC*5 **9 **3/4 **0.*5 2 **1/4 *0.*0 *7.*5 NC*5, NC*5,NC*8(3 1/2IF) **8 **5 **1/4 **8.*5 **1/4 ***3/*6 *7.*5 *1.*4 NC*6(4 IF) NC*6(4 IF) ***9 ***7 **1/2 **5.1 **1/4 ***3/*6 *7.*5 *1.*4 NC*6(4 IF) NC*6(4 IF) ***1 ***0 7 **7.8 **1/4 ***3/*6 *7.*5 *1.*4 NC*0(4 1/2IF) NC*0(4 1/2IF) ***2 ***5 8 **3.2 ***3/*6 3 *1.*4 *6.*0 6 5/8REG 6 5/8REG ***2 9 **8.6 ***3/*6 3 *1.*4 *6.*0 7 5/8REG 7 5/8REG ***0 **1/2 **1.3 3 *6.*0 7 5/8REG ***9 *0 **4 3 *6.*0 NC*0 ***0