Quality Standard:

API 7 specification for rotary drill stem elements

API 5DP specification for drill pipe

Steel Grade:

Integral hwdp : aisi 4145hm

Welded hwdp : aisi 1340 pipe body, aisi 4140hm tool joint

Sizes Range:

Outer Diameter: 2 7/8”- 6 5/8”

Weight Range: 6.27#/ft through 27.72#/ft

Lengths: range 2 and range 3

End Finishes: internal upset, external upset, plain end upset, non upset

Tool Joint Type: nc38、nc46、nc50、5-1/2 fh

Application:

Heavy weight drill pipe (hwdp) is usually run in between the drill collars and the drill pipe in order to prevent fatigue of the drill pipe in the vertical drilling industry. heavy weight drill pipe is also utilized in the horizontal directional drilling (hdd) industry for added strength in high stress situations. 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.