HEAVY WEIGHT DRILL PIPE

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.

Standard:API 5DP, API SPEC 7-1

Grade:API 5DP Grade DZ50, E75, R780, X95, G105, S135

Product introduction

Standard:API 5DP, API SPEC 7-1
Grade:API 5DP Grade DZ50, E75, R780, X95, G105, S135
Sizes:2 3/8”, 2 7/8”, 3 1/2” 4”, 4 1/2”, 5”, 5 1/2” up to 6 5/8” OD Range in mm: 60.3mm, 73mm, 88.9mm, 101.6mm, 114.3mm, 127mm, 139.7mm Range of Thickness: 6.5mm to 12.7mm, or cutomized
Connection threads:NC26, NC31, NC38, NC40, NC46, NC50, 5 1/2FH.6 5/8FH.
Internal Upset:IU, EU, IEU
Length:R1, R2, R3
Connection:API Regular, PAC, H90
Description
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 hard banding is standard on tool joints connections and central upset. The types of hard banding 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.

Technical data

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

Spiral heavy weight drill pipe
Specification mm	Tube					Joint
Specification mm	ID mm	Elevator upsetmm	elevator groove /Slip outside diametermm	Screw in diametermm	Spiral groove depthmm	Thread Type	OD mm	ID mm
88.9(3 1/2)	54	92.1	88.9	101.6	9.5	NC38	120.6	54
114.3(4 1/2)	69.8	117.5	114.3	127	12.7	NC46	158.8	69.8
127.0(5)	76.2	130.2	127	139.7	12.7	NC50	165.1	76.2

Materials

Steel Mark	Chemical Composition%
Steel Mark	C	Si	Mn	P	S	Cr	Mo	Cu	Al
4145H	0.42～0.48	0.15～0.35	0.90～1.20	≤0.03	≤0.03	0.90～1.20	0.15～0.25	≤0.2	0.025～0.045
Other Elements：N≤0.015，Ni≤0.5

Application	Material	Size	Yield Strength (Min KSI)	Ultimate Strength (Min KSI)	Hardness Brinell (HB)	Elongation (A%)	Min CHarpy (ft-lbs @+20°C)
Integral Standard & NS-1	AISI 4145H Modified	All	110	140	285 to 340	13	40
Welded Standard (central part)	AISI 1340 Modified	All	65	95	235 (max)	18	30
Welded NS-1 (central part)	AISI 4140H Modified	All	120	140	285 to 340	13	40
Welded Standard & NS-1 (tool joint)	AISI 4140H Modified	Above 7 1/4”	120	140	285 to 340	13	40
Standard welded & NS-1 (tool joint)	AISI 4140H Modified	Up to 7 1/4”	100	135	285 to 340	13	40
HWDP-110 HW MS	ASCOWELL C	Above 6 3/4”	110	140	285 to 340	13	0
HWDP-110 HW MS	ASCOWELL C	Up to 6 3/4”	100	135	285 to 340	13	55
HWDP-65 HW MS (tool joint)	ASCOWELL C	Above 6 3/4”	110	140	285 to 340	13	55
HWDP-65 HW MS (tool joint)	ASCOWELL C	Up to 6 3/4”	100	135	285 to 340	13	55
HWDP-65 HW MS (central part)	AISI 1340 Modified	All	65	95	235 (max)	18	30