Bulroc CDS 240R

Concentric Drilling System

Drilled Hole Diameter 11.65" -- Casing Size 10.75" O.D. x 10.24" I.D.

Technical Specifications

The CDS 240R is a Concentric Overburden Drilling System designed for the continuous casing of a 11.65" diameter hole, through loose overburden materials down into solid bedrock. The CDS 240R comprises the Driver, which is available for drilling with most 8" 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 11.65". The system can be withdrawn through the casing by reverse rotating, effectively closing the segments within the envelope of the body.

Complete System: CDS240R094

	Component Parts
	Reference	Description
	1	Driver (DHD380)
	2	Ring Bit
	3	Seloc Pin (2)
	4	Segments (3)
	5	Foot Valve
	Specifications
	Major Body Diameter	10.08"
	Length (less footvalve)	29.33"
	System Closed	9.45"
	System Open	11.65"
	Casing Size	10.75" O.D. x 10.24" I.D.
	Total Weight DHD380 Shank	299.2 lbs.