Oil Drill Collar 6 1/4"-Nc46 with API Spec 7-1

Price Negotiable

Price: USD1500-5000

MOQ: 1 PC

Delivery Time: 10 working days

Brand: SHITAN

Product Description

Product Information
Drill Collar is mainly used for providing drill bit with required drilling pressure, ensuring pull force transmitted to drill pipe and centralize the drill bit. According to API Spec 7-1 specifications, the material quality is 4145H that's after heat-treatment, thread hardening treatment and phosphating to better antiseize. It also can be produced upon customers' requirements.
The parameter of drill collar according to API Spec 7-1 specifications.

Drill Collar Thread	Outside Diameter D		Inside Diameter d		Length	Chamfer Diameter	Reference Bending Strength Ratio
	Outside Diameter D		Inside Diameter d		L	Df
	mm	in	mm	in	mm	mm
NC31-41(27/8IF)	104.8	4 1/8	50.8	2	9140or9450	100.4	2.43:1
NC35-47	120.7	4 3/4	50.8	2	9140or9450	114.7	2.58:1
NC38-50(31/2IF)	127	5	57.2	2 1/4	9140or9450	121	2.38:1
NC44-60	152.4	6	57.2	2 1/4	9140or9450	144.5	2.49:1
NC44-60	152.4	6	71.4	2 13/16	9140or9450	144.5	2.84:1
NC44-62	158.8	6 1/4	57.2	2 1/4	9140or9450	149.2	2.91:1
NC46-62(4IF)	158.8	6 1/4	71.4	2 13/16	9140or9450	150	2.63:1
NC46-65(4IF)	165.1	6 2/4	57.2	2 1/4	9140or9450	154.8	2.76:1
NC46-65(4IF)	165.1	6 2/4	71.4	2 13/16	9140or9450	154.8	3.05:1
NC46-67(4IF)	171.4	6 3/4	57.2	2 1/4	9140or9450	159.5	3.18:1
NC50-67(41/2IF)	171.4	6 3/4	71.4	2 13/16	9140or9450	159.5	2.37:1
NC50-70(41/2IF)	177.8	7	57.2	2 1/4	9140or9450	164.7	2.54:1
NC50-70(41/2IF)	177.8	7	71.4	2 13/16	9140or9450	164.7	2.73:1
NC50-72(41/2IF)	184.2	7 1/4	71.4	2 13/16	9140or9450	169.5	3.12:1
NC56-77	196.8	7 3/4	71.4	2 13/16	9140or9450	185.3	2.70:1
NC56-80	203.2	8	71.4	2 13/16	9140or9450	190.1	3.02:1
6 5/8REG	209.6	8 1/4	71.4	2 13/16	9140or9450	195.7	2.93:1
NC61-90	228.6	9	71.4	2 13/16	9140or9450	212.7	3.17:1