Deep Hole CHD Wireline Core Rod

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Deep Hole CHD Wireline Core Rod

CHD wireline drill rod was originally developed to address a requirement for a dependable drill string for deep hole gold exploration in the South African mining industry.
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CHD wireline drill rod was originally developed to address a requirement for a dependable drill string for deep hole gold exploration in the South African mining industry.

Deep Hole CHD Wireline Core Rod

CHD wireline drill rod was originally developed to address a requirement for a dependable drill string for deep hole gold exploration in the South African mining industry. As its reputation grew as a reliable deep hole coring drill rod it was used extensively in the slim hole oil and gas industry with applications worldwide by companies such as Standard Oil, Texaco, and Total S.A. The Russian, and North American geothermal industry also found the CHD drill string an excellent match for their deep coring applications.

From a design standpoint the Roschen CHD drill rod is an internally upset product with a robust tool joint fused to a lighter wall midbody using plasma arc welding technology.

Roschen CHD Drill Rods feature a double buttress thread which is unique in that it can deliver both exceptional strength for depth and the durability perform on larger drill rigs used in deep hole coring operations. CHD strings are commonly known as CHD 70, CHD 73, CHD 76, CHD 101, CHD 134 for their respective hole diameters. The CHD drill rod is available in diameters 69.9 mm – 94mm – 127 mm in lengths up to 6 meters.

Roschen Composite Heavy Duty Wire Line Drill Rod Data Table
Taper Lock Wire Line Drill Rod	O.D.		I.D.		Wall Thickness		Weight lbs.per foot
	A		B		C
	inch	mm	inch	mm	inch	mm
CHD76	2.75"	69.85	2.165"	54.991	0.188"	4.7752	5.7
CHD101	3.75"	95.25	3.091"	78.5114	0.219"	5.5626	8.8
CHD134	5.00"	127	4.125"	104.775	0.250"	6.35	14.04