Unionlever (Group) Petroleum Equipment Co.,Ltd.

Integral Heavy Weight Drill Pipe





The wall thickness of heavy weight drill pipe is between drill pipe and drill collar, its structure is similar with drill pipe. It is made from premium alloyed steel. Its both tool joints and middle upset are welded hardbands. Technical parameters meet with API Spec7-1 Standard.


Heavy Weight Drill Pipe( HWDP)

Integral heavy weight drill pipe is the transition zone between drill collar and drill pipe. It can not only reduce stress-formation in the connection of drill collar and drill pipe, but also reduce the wear on OD.
Integral heavy weight drill pipe is made from one piece of AISI 4145H solid bar, fully heat treated, all physical properties conform to API spec7 latest edition.
HWDP’s wear resistance hardbanding is standard on tool joints connections and central upset. The types of hardbanding include Arnco 100XT and100XT. All threads are phosphated, copperized or cold worked. All connections are equipped with pressed steel thread protectors. All theads are machined with CNC lathes –Double-shoudered and special threads.
Size:
2 7/8"OD~ 6 5/8" OD Length :9300m
4 1/2"OD, 5"OD, Length :13500m

Technical specifications and parameters
Size(in) O.D. (in) I.D. (in) Tool Joint O.D. (in) Tool Joint I.D. (in) Connection Max.elevator diameter (in) Central upset dia. (in) Min.drift dia.size(in)
3 1/2 3 1/2 2 1/4 4 3/4
(4 7/8, 5)		 2 1/4 NC38 3 7/8 4 2
2 1/16 2 1/16 1 13/16
4 4 2 1/2 5 1/4 2 1/2 NC40 4 3/16 4 1/2 2 1/4
2 9/16 2 9/16 2 5/16
4 1/2 4 1/2 2 11/16 6 1/4 2 11/16 NC46 4 11/16 5 2 7/16
2 3/4 2 3/4 2 1/2
2 13/16 2 13/16 2 9/16
5 5 3 6 5/8 3 NC50 5 1/8 5 1/2 2 3/4
5 1/2 5 1/2 3 1/4 7
(7 1/4, 7 1/2)		 3 1/4 5 1/2 FH 5 11/16 6 3
3 3/8 3 3/8 3 1/8
3 7/8 3 7/8 3 5/8
4 4 3 3/4
6 5/8 6 5/8 4 8
(8 1/4, 8 1/2)		 4 6 5/8 FH 6 15/16 7 1/8 3 3/4
4 1/2 4 1/2 4 1/4
5 5 4 3/4

 
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