Description
Heavy weight drill pipe is a medium-weight drill tool similar
to drill pipe, whose wall is thicker than that of drill pipe and thinner than
that of drill collar. Its tube is connected with special length-added drill
pipe joint (integral heavy weight drill pipe is made up of tube and tool
joint). Among assemblies, it is generally added between drill pipe and drill
collar to prevent sudden changes in cross-section of drill string, and reduce
its fatigue.
Technical Parameter
Nominal size
Pipe body
Tool joint
Weight Kg/PC
D (mm)
d (mm)
Upset dimension
RSC type
DJ(mm)
ID (mm)
HSC bevel dia DF (mm)
Center dia. Dm (mm)
End dia. DTE (mm)
3 1/2
88.9
57.4
101.6
98.4
NC38
127
52.4
116.3
312
3 1/2
88.9
57.2
101.6
98.4
NC38
127
57.2
116.3
282
4
101.6
65.1
114.3
106.4
NC40
133.4
65.1
127.4
370
4 1/2
114.3
69.9
127
119.1
NC46
158.8
69.9
145.3
558
5
127
76.2
139.7
130.2
NC50
168.3
76.2
154
672
5 1/2
139.7
92.1
152.4
144.5
5 1/2FH
184.2
92.1
170.7
776
6 5/8
168.3
114.3
184.2
176.2
6 5/8FH
203.2
144.3
195.7
964
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Email：sales@boban-oiltools.com
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