API 7-1 Spiral Non-Magnetic Drill Collar 3-1/8" Drill collar manufacturer from China Shaanxi FYPE Rigid Machinery Co., Ltd

API 7-1 Spiral Non-Magnetic Drill Collar

Price:	2000.0 USD
Payment Terms:	T/T,L/C
Place of Origin:	Shaanxi, China (Mainland)


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Product Detail

Model No.: 3-1/8" Drill collar

Production Capacity: 10000ea

Delivery Date: 45days

Means of Transport: Ocean,Land,Air

Packing: Standard export packing

Drill collar is at the end of the drill stem, it is the important part of the drill tools

Description:

Drill collars are heavy, stiff steel tubulars. They are used at the bottom of a BHA to provide weight on bit and rigidity.The primary function of the drill collars is to provide sufficient WOB (Weight on bit). The weight of the collars also ensures that the drill pipe is kept in tension to prevent buckling.

Standard: API 7-1, GOST, NS-1

Material: AISI 4145H, AISI 4145 H MOD, Non-mag material

Size:2-7"~11"

Technical Parameter:

Drill collar
Products Range	2-7/8"~11
Material	AISII 4145HM, Non-Mag
Type of end finish	Slick, spiral
Drill collar No.	OD	Bore Dia	B.S.R	L, ft ±6in	Tensile strength			Impact Value	Hardness
	OD	Bore Dia	B.S.R	L, ft ±6in	Y.S.	T.S.	Elongation	Impact Value	Hardness
	D Inch (mm)	d Inch (mm)	Round No.	Ft	Y.S.	T.S.	Elongation	Impact value	Brinel
NC23-31	3-1/8 (79.4)	1-1/4 (31.8)	2.57:1	30	Min.110000psi (≥758Mpa)	Min.140000psi (≥965Mpa)	Min.13%	Min.59ft.lb (≥80j)	285~341
NC26-35 (2-3/8 IF)	3-12 (88.9)	1-1/2 (38.1)	2.42:1	30
NC31-41 (2-7/8 IF)	4-1/4 (104.8)	2(50.8)	2.43:1	30/31
NC35-47	4-3/4 (120.7)	2(50.8)	2.58:1	30/31
NC38-50 (3-1/2 IF)	5(127.0)	2-1/4 (57.2)	2.38:1	30/31
NC44-60	6(152.4)	2-1/4 (57.2)	2.49:1	30/31
NC44-60	6(152.4)	2-13/16 (71.4)	2.84:1	30/31
NC44-62	6-1/4 (158.8)	2-1/4 (57.2)	2.91:1	30/31
NC46-62 (4 IF)	6-1/4 (158.8)	2-13/16 (71.4)	2.63:1	30/31
NC46-65 (4 IF)	6-1/2 (165.1)	2-1/4 (57.2)	2.76:1	30/31
NC46-65 (4 IF)	6-1/2 (165.1)	2-13/16 (71.4)	3.05:1	30/31
NC46-67 (4 IF)	6-3/4 (171.5)	2-1/4 (57.2)	3.18:1	30/31
NC50-67 (4-1/2 IF)	6-3/4 (171.5)	2-13/16 (71.4)	2.37:1	30/31
NC50-70 (4-1/2 IF)	7(177.8)	2-1/4 (57.2)	2.54:1	30/31	Min.100000psi (≥758Mpa)	Min.135000psi (≥965Mpa)	Min.13%	Min.59ft.lb (≥80j)	285~341
NC50-70 (4-1/2 IF)	7(177.8)	2-13/16 (71.4)	2.73:1	30/31
NC50-72 (4-1/2 IF)	7-1/4 (184.2)	2-13/16 (71.4)	3.12:1	30/31
NC56-77	7-3/4 (196.9)	2-13/16 (71.4)	2.70:1	30/31
NC56-80	8(203.2)	2-13/16 (71.4)	3.02:1	30/31
6-5/8 REG	8-1/4 (209.6)	2-13/16 (71.4)	2.93:1	30/31
NC61-90	9(228.6)	2-13/16 (71.4)	3.17:1	30/31
7-5/8 REG	9-1/2 (241.3)	3(76.2)	2.81:1	30/31
NC70-97	9-3/4 (247.7)	3(76.2)	2.57:1	30/31
NC70-100	10(254.0)	3(76.2)	2.81:1	30/31
8-5/8 REG	11(279.4)	3(76.2)	2.84:1	30/31