Bulroc CDS 280R

Concentric Drilling System

Drilled Hole Diameter 13.58" -- Casing Size 12.76" O.D. x 12.01" I.D.

Technical Specifications

The CDS 280R is a Concentric Overburden Drilling System designed for the continuous casing of a 13.58" diameter hole, through loose overburden materials down into solid bedrock. The CDS 280R comprises the Driver, which is available for drilling with most 10" hammers, together with a replaceable Ring Bit and three replaceable Segments.

At the start of the drilling operation, the Segments are in the closed position to allow the system to pass through the casing shoe. When drilling commences, the Segments swing out to drill a hole of 13.58". The system can be withdrawn through the casing by reverse rotating, effectively closing the segments within the envelope of the body.

Complete System: CDS280R100

	Component Parts
	Reference	Description
	1	Driver (N100)
	2	Ring Bit
	3	Seloc Pin (2)
	4	Segments (3)
	5	Foot Valve
	Specifications
	Major Body Diameter	11.81"
	Length (less footvalve)	30.51"
	System Closed	11.02"
	System Open	13.58"
	Casing Size	12.76" O.D. x 12.01" I.D.
	Total Weight N100 Shank	433.4 lbs.