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HWDP

Brief Introduction:

Heavy weight drill pipe is the most commonly used in the vertical section of the hole and provides weight on the bit for directional drilling while maintaining more flexibility than a drill collar.

Heavy weight drill pipe (HWDP) may be used to make the transition between the drill collars and drill pipe. The function of the HWDP is to provide a flexible transition between the drill collars and the drill pipe. Heavy weight drill pipe has a "center upset", also known as wear pad, that increases tube life by protecting the tube from wearing on the outer diameter by keeping the tube away from the hole wall. It also reduces hole drag and differential sticking problems.

Specification

Pipe Body

Joint

Weight Kg/ Piece

Outer Diameter

Inner Diameter

Upset Dimension

RSC Type

Outer Diameter

Inner Diameter

HSC Bevel Diameter

Kg/Piece

(mm)

(mm)

Center

End 

RSC type

(mm)

(mm)

(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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