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API 7-1 Drill String Components , HWDP Heavy Weight Drill Pipe

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API 7-1 Drill String Components , HWDP Heavy Weight Drill Pipe

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Brand Name :
Model Number :	All types
Certification :	API 7-1
Price :	USD500-10000/pc
Payment Terms :	L/C, T/T, Western Union, MoneyGram
Supply Ability :	800 pcs per month
Delivery Time :	30 work days

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API 7-1 Drill String Components , HWDP Heavy Weight Drill Pipe

API 7-1 Drilling Rig HWDP Integral Spiral Heavy Weight Drill Pipe

Description of heavy weight drill pipe

Integral heavy weight drill pipe is manufactured from AISI 4142H-4145H modified drill collar material according to SY/T 5146-1997,thick-walled pipe called integral heavy weight drill pipe was developed to provided a gradual transition from the heavy drill collars to the relatively light weight drill pipe. This intermediate weight pipe has a wall thickness of approximately, and helps prevent stress concentration at the top of the drill collars. It also allows you to drill at higher rpms, reducing torque and differential pressure sticking. It is intended primarily for directional drilling. Because it bends easily, it simplifies directional control and minimizes connection fatigue problems common to high angle or horizontal drilling. The reduced number of pipe failures and increased drill stem service also make it appropriate for some straight-hole applications.

Specifications of heavy weight drill pipe

Integral heavy weight drill pipe
Size	Outer diameter	Inside diameter	Joint outer diameter	Joint inside diameter	Connecting thread	Slip max. diameter	Upset middle diameter	Min. drift diameter
3 1/2	3 1/2	2 1/4	4 3/4	2 1/4	NC38	3 7/8	4	2
		2 1/16	(4 7/8, 5)	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	3 1/4	5 1/2 FH	5 11/16	6	3
		3 3/8	(7 1/4, 7 1/2)	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	4	6 5/8 FH	6 15/16	7 1/8	3 3/4
		4 1/2	(8 1/4, 8 1/2)	4 1/2				4 1/4
		5		5				4 3/4
Spiral heavy weight drill pipe
Specification mm	Tube					Joint
	ID mm	Elevator upset mm	elevator groove mm	Screw in diameter mm	Spiral groove depth mm	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
Yield strength		Tensile Strength		Elongation	HB	Charpy impact
MPa	Psi	MPa	Psi	A%		Akv J
≥758	≥110000	≥965	≥140000	≥13	285~341	≥54

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Dongying OilMan Machinery Equipment Co.

Address: North Two Road, Dongying City, Shandong Province, China.

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