Hole opener, hole openers, Rotary hole opener, Rotary hole openers--Jereh Drilltech

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Hole Opener
Hole opener is one kind of universal hole opening tool for onshore and offshore oilfield drilling. Working together with bit, hole opener can finish both drilling and opening at the same time.

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Type	Hole Dia. (in)	Blade No.	Min. Guiding Hole (in)	Mandrel Fishing Neck Dia.(in)	Mandrel I.D. (in)	Upper Threads (Pin Thread)	Lower Threads (Box Thread)	Overall Length (in)
JD-HO311	12-1/4	3	8-1/2	8	1-1/2	6-5/8 REG	6-5/8 REG	60
JD-HO406	16	3	10	9-1/2	2-1/4	7-5/8 REG	7-5/8 REG	72
JD-HO444	17-1/2	3	10	9-1/2	2-1/4	7-5/8 REG	7-5/8 REG	72
JD-HO-660	26	3	17-1/2	10	3	7-5/8 REG	7-5/8 REG	69
JD-HO-914	36	4	26	10	3-1/2	7-5/8 REG	7-5/8 REG	104-3/8