drill hole opener

reamer drill bits, 1. Used in construction and foundation, 2. Very large customized diameter ., 3.The pilot is tricone bit - details see: https://www.machineto.com/drill-hole-opener-10316932

Place of Origin:Hebei China (Mainland)	Brand Name:Solidkey	Model Number:Customized	Type:Drill Bit
Machine Type:Drilling Tool	Certification:API	Material:Carbide	Processing Type:Forging
Use:Well Drilling	Bit type:Piling bit	cutter number:according to your request	cutter type:according to your request
bit color:depend on your request

Preface:
1> Drillers always drill a smaller hole at first, then enlarger it with hole opener, it is a type of regular drilling technology when the drilling machine is lower power or the end-hole is too big.

2>We can make the hole opener and solutions according to the hardness of rocks, drilling depth, size of pilot hole, size of end-hole.

3> If fix the tricone bits as the pilot bits, the hole opener will be a rock bits, hole opener with tricone bits as pilot bits is always applicable in special sizes well drilling.

pilling bit , Multiply cone bit , reamer , hole opener bit:

1. Cutting Structure
The reamer mainly consists of four or more cones. Cutting Structure with premium tungsten carbide hardfacing or premium tungsten carbide insert of formulas and new techniques is utilized, and increases wear-resistance capability of reamer. The pilot is three cone bit( tricone bit ).

2.Seal and Lubrication
High performance HNBR O-ring for bearing seal and advanced grease for lubrication.

3.Product Application
It is suitable for the large size well, mining and infrastructure applications.

4.Recommended Drilling Parameter

IADC	WOB (KN/mm)	RPM (r/min)	Applicable Formations
517/537	0.4~1.0	120~60	Soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft limestone, etc.
617	0.45~1.1	90~50	Medium hard formation with high compress strength, such as hard shale, limestone, sandstone, dolomite. etc
637	0.5~1.2	80~40	Hard formations with high compressive strength, such as sandstone, limestone, dolomite ,hard gypsum, marble, etc.
117/127	0.35~0.9	150~70	Soft to medium formations with low compressive strength , such as medium soft shale, hard gypsum, medium soft limestone, medium soft sandstone, soft formation with harder interbed, etc.
Note: The upper limits of WOB and RPM in above table should not be used simultaneously.