Geological Drilling Casing Tube Head

Casing head is like the sub adaptor, it’s one end connect with the casing tubes, and another end is connect with drill rods or with other drilling tools during drilling.

Casings Size:

Metric Series Casings
Size	Outer Diameter		Inner Diameter
Size	inch	mm	inch	mm
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
Flush-Jointed W Series Casings
BW	2.874	73.0	2.374	60.3
NW	3.500	88.9	3.000	76.2
HW	4.500	114.3	4.000	101.5
PW	5.500	139.7	5.000	127.0
Flush-Coupled X Series Casings
NX	3.500	88.9	3.000	76.2
HX	4.500	114.3	3.937	100.0
PX	5.500	139.7	4.867	123.6
Flush-Jointed Water Well Casings (B.S.879)
4"	4 1/2"	114.3	3 7/8"	98.3
5"	5 1/2"	139.7	4 7/8"	123.7
6"	6 5/8"	168.3	5 7/8"	149.3
8"	8 5/8"	193.7	7 7/8"	174.7

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