Drill Reduce Underreamer

The application of drilling hole opener can improve the hole quality. Meanwhile, it can save rig using time.

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Description

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