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.

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

Integral Spiral Heavy Weight Drill Pipe

Integral spiral heavy weight drill pipe is to extend the central upset of heavy weight drill pipe and to cut spiral groove on heavy weight drill pipe.

Technical specifications and parameters

Size mm(in)	Pipe Body					Tool Joint
Size mm(in)	I.D. (mm)	Elevator upset (mm)	Elevator/slip groove O.D. (mm)	Spiral O.D. (mm)	Spiral depth (mm)	Connection	O.D. mm	I.D. mm
88.9(3 1/2)	54.0	92.1	88.9	101.6	9.5	NC38	120.6	54.0
114.3(4 1/2)	69.8	117.5	114.3	127.0	12.7	NC46	158.8	69.8
127.0(5)	76.2	130.2	127.0	139.7	12.7	NC50	165.1	76.2

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