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Home > Drilling Tools & Equipment > Drill Reduce Underreamer
Drill Reduce Underreamer
Introduction
The application of drilling hole opener can improve the hole quality. Meanwhile, it can save rig using time. Another benefit is the ability of continuous drilling, reducing the number of drilling and reaming. Therefore, the benefit of drilling reamer is: can quickly drill a smooth implementation of concentric hole, reduce the losses of drilling rig caused by taking up much of rig time in lowering the casing, tripping and completion so as to achieve the completion ahead of schedule and cost savings.

Specifications
Body OD mm(in) Connection Open Scope mm(in) Working Displacement L/S Working WOB  kN  (Ibf) Max allowable tensile load  kN(Ibf) Allow able working torque kN·m  (Ibf ·ft) Length (mm)
114    (4 1/4) NC31 118-125   (4 5/8-4 7/8) ≥6 20-50 (4500-11000) 700 (157000) 6(4425) 1960
150  (5 7/8) NC38 150-178(5 7/8-7) ≥6 20-50 (4500-11000) 1145 (257000) 12.8(9441) 1954
230 (8) NC50 216-245(8 1/2-9 5/8) ≥6 20-50 (4500-11000) 2221 (500000) 36(26550) 2782
 
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