Products
homeProducts
Geological Casing Tubes
Standard lengths are 3.0m, 1.5m, 1m, and 0.5m. Other lengths are available on
request.
Casing tubes are available in DCDMA sizes BW, NW, HW, PW, SW & Chinese
standard sizes and metric sizes 46 -146 mm.
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.
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.
Metric Casing
Tubes
Metric Casing Tubes are available in diameter range 46mm – 146mm. They are
manufactured from thin wall cold drawn steel tubes of a very high mechanical
specification. The tubes are flush-jointed with a male thread at one end and a
female thread at the other (thread pitch 4 t.p.i).
The casing tubes
are designed to be used in conjunction with TT, T2 and T6 series metric core
barrels. For example, a T2-86 core barrel will fit inside 101 metric casing,
and a T6-101 core barrel will fit inside 116 metric casing, etc.
The clearance between the core barrel and the inside of the casing tube is
quite small, reducing the volume of water that is required for flushing, and
creating a high up-hole fluid velocity which facilitates efficient removal of
rock cuttings from the borehole.
Size
DCDMA W Series Casings |
||||
Size |
Outer Diameter |
Inner Diameter |
||
|
Inch |
mm |
Inch |
mm |
BW |
2.874 |
73.03 |
2.374 |
60.3 |
NW |
3.500 |
88.90 |
3.000 |
76.2 |
HW |
4.500 |
114.30 |
4.000 |
101.6 |
PW |
5.500 |
139.7 |
5.000 |
127.0 |
SW |
6.626 |
168.30 |
6.123 |
155.7 |
Flush-Coupled X Series Casings |
||||
NX |
3.5000 |
88.9 |
3.172 |
80.57 |
HX |
4.5000 |
114.3 |
4.110 |
104.39 |
PX |
5.459 |
138.66 |
4.933 |
125.30 |
Metric Series Casings |
||||
46 |
|
44.5 |
|
37.15 |
56 |
|
54.15 |
|
47.15 |
66 |
|
64.25 |
|
57.25 |
76 |
|
74.25 |
|
67.25 |
86 |
|
84.25 |
|
77.25 |
101 |
|
98.00 |
|
88.30 |
116 |
|
113.00 |
|
103.30 |
131 |
|
128.00 |
|
118.30 |
146 |
|
143.00 |
|
133.30 |
Chinese Standard Coupling Series Casings |
||||
73 |
|
73 |
|
64 |
89 |
|
89 |
|
80 |
108 |
|
108 |
|
99 |
127 |
|
127 |
|
116 |
146 |
|
146 |
|
136 |
168 |
|
168 |
|
155 |
Contact Us
You have a specific question or would you simply like to learn more about us?
Find our contact information below or use our Contact Form.