Conventional three cone design roller rock bits are widely used in soft to medium-hard formations.   This versatile bit is used in overburden and has been quite successful in drilling rock. However, it does require a considerable amount of down press to successfully cut rock.   Roller rock bits are used with drilling muds or plain water. (Bits are available on special order for use with air as a flushing / cooling medium). The bit is usually backed up by a heavy steel drill collar to provide the additional weight needed.

3-Cone Type Roller Rock Bit

3-Cone Type Roller Rock Bits
Size		Part Number	Connection	Type Thread	Weight
inches	mm.				lbs.	kg.
2-15/16	74.6	5663CONE21516-NW	NW Rod	DCDMA	3.5	1.6
3-1/8	79.4	5663CONE318-NW	NW Rod	DCDMA	4.0	1.8
3-1/4	82.6	5663CONE325-NW	NW Rod	DCDMA	4.5	2.0
3-1/2	88.9	5663CONE350-238	2-3/8 in.	API Reg.	5.0	2.3
3-1/2	88.9	5663CONE350-NW	NW Rod	DCDMA	5.0	2.3
3-5/8	92.1	5663CONE358-238	2-3/8 in.	API Reg.	7.0	3.2
3-3/4	95.3	5663CONE375-238	2-3/8 in.	API Reg.	7.5	3.4
3-7/8	98.4	5663CONE378-238	2-3/8 in.	API Reg.	7.5	3.4
4-1/8	104.8	5663CONE418-238	2-3/8 in.	API Reg.	8.5	3.9
4-1/4	108.0	5663CONE425-238	2-3/8 in.	API Reg.	9.0	4.1
4-1/2	114.3	5663CONE450-238	2-3/8 in.	API Reg.	10.0	4.5
4-3/4	120.6	5663CONE475-278	2-7/8 in.	API Reg.	12.0	5.4

DRILLERS SERVICE, INC.                   HICKORY, NC USA                  800-334-2308,  EXT. 230

 

[About Us][Products][News][Trade Shows][Contact Us]