Bw Nw Dcdma Geological High Quality Pipe Casing for Mining Exploration

• Customization: Available
• Type: Core Drill
• Usage: Geotechnical/Mining Exploration
• Model NO.: BW NW
• Certification: ISO
• Condition: New
• Length: 0.5m 0.6m 0.9m 1m 1.5m 3m
• Material: 42mnmo7 or R780
• Standard: International Standard
• Quality: High Quality
• Transport Package: Iron Reinforced Frame
• Specification: DCDMA, CDDA
• Trademark: Miracleland
• Origin: Changsha, Hunan, China
• HS Code: 73043120
• Production Capacity: 1000 PCS/Month

Product Description

Product Description

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	139.70	5.000	127.0
SW	6.626	168.30	6.123	155.7
Flush-Coupled X Series Casings
NX	3.500	88.9	3.172	80.57
HX	4.500	114.3	4.110	104.39
PX	5.459	138.66	4.933	125.30
Metric Series Casings
46		44.15		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

 

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