DCDMA Casing Tubes
Available in inch diameters and designed to work with DCDMA (American- style) core barrels such as WG and WF Series. These casings are relatively heavy compared with Metric Series, and the nesting of successive diameters involves a greater clearance.
X Series Casing
Flush-coupled casing: each casing tube has a box thread at both ends and lengths are connected together by a pin-to-pin coupling. This allows couplings to be replaced when pin threads become worn or damaged. It also means that the casing tube can have a thinner wall than the coupling, allowing the overall weight of casing string to be minimized. This can be important when drilling to greater depths.
W Series Casing
Flush-jointed casing: each casing tube has a male thread at one end and female thread at the other end. The heavy wall section provides internal and external mating shoulders for the threaded portion to butt-up against, providing twice the contact area of coupled casing and helping to prevent the threads climbing under heavy torque loads. This is by far the most popular type of casing used in geotechnical applications.
Technical Data
Casing Type | Tube O.D Inches (mm) | Tube I.D. Inches (mm) | Coupling I.D. Inches (mm) | Threads per inch |
X Series: | ||||
NX | 3.500″ (88.9) | variable | 3.000″ (76.2) | 8 |
HX | 4.500″ (114.3) | variable | 4.870“ (123.7) | 5 |
PX | 5.500″ (139.7) | variable | 4.870“ (123.7) | 5 |
SX | 6.625″ (168.3) | variable | 5.875″ (149.2) | 5 |
W Series: | ||||
BW | 2.875″ (73.0) | 2.375″ (60.3) | No coupling | 4 |
NW | 3.500″ (88.9) | 3.000″ (76.2) | No coupling | 4 |
HW | 4.500″ (114.3) | 4.000″ (101.6) | No coupling | 4 |
PW | 5.500″ (139.7) | 5.000″ (127.0) | No coupling | 3 |
SW | 6.625″ (168.3) | 5.937″ (150.8) | No coupling | 3 |
UW | 7.625″ (193.7) | 7.000″ (117.8) | No coupling | 3 |
ZW | 8.625″ (219.1) | 8.000″ (203.2) | No coupling | 3 |
Casing is available in 0.75, 1.5 and 3.0 metre lengths, and other lengths available on request.
Technical Standards:
Manufactured in accordance with International Standard ISO 3551-2 : 1992, Rotary core diamond drilling equipment – System A – Part 2: Inch units.
Accessories:
Casing Drive Heads and Casing Clamps are available for each diameter.
Casing Shoes are supplied with Tungsten Cardbide (T.C.) crowns or Diamond Impregnated crowns.
Please refer to our Casing Shoes page for further details.
