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Product type:Oil Country Tubular Goods--Drilling String
 
Name:Heavy weight drill pipe
Item:ydaer_1
Description:
 Heavy weight drill pipe
Integral heavy weight drill pipes are manufactured from AISI 4142H-4145H modified drill collar material according to SY/T 5146-1997, thick-walled pipe called integral heavy weight drill pipe was developed to provid a gradual transition from the heavy weight drill collars to the relatively light weight drill pipe. This intermediate weight pipe has a wall thickness of approximately, and it helps prevent stress concentration at the top of the drill collars. It also allows you to drill at higher pms, reducing torque and differential pressure sticking. It is intended primarily for directional drilling. Because it bends easily, it simplifies directional control and minimizes connection fatigue problems common to high angle or horizontal drilling. The reduced number of pipe failures and increased drill stem service also make it appropriate for some straight hole applications.
Size3 1/2"4 1/2"5"5 1/2"
ConnectionNC38NC46NC505 1/2 FH
Nominal size
Pipe body
Tool joint
Weight
Kg/Piece
OD
(mm)
ID
(mm)
Upset dimension
RSC type
DJ
(mm)
ID
(mm)
HSC bevel
Dia
(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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