API Spec 7-1 Oilfield Slick / Square / Spiral Drill Collar

• Customization: Available
• After-sales Service: 24/7
• Warranty: 1 Year
• Model NO.: Non-magnetic Drill Collar
• Certification: ISO 9001:2000
• Standard: API 7-1
• Surface Treatment: Polishing
• Manufacturing Process: Forging
• Material: 4145h
• Weight (Kg): 500
• Condition: New
• Processing Type: Forging
• Machine Type: Drilling Tool
• Use: Well Drilling
• Showroom Location: None
• Video Outgoing-Inspection: Provided
• Type: Drill Collar
• Applicable Industries: Energy & Mining
• Marketing Type: New Product 2023
• Size: 79.4mm-279.4mm
• Packing: Bundled
• Thread Type: API Thread
• Machinery Test Report: Provided
• Transport Package: Wooden Case
• Specification: According to the custom
• Trademark: Goldenman
• Origin: Shandong, China
• Package Size: 76.00cm * 72.00cm * 62.00cm
• Package Gross Weight: 3000.000kg

Product Description

Drill collar

Drill Collar is the basic component in the BHA which provides weight on the bit for drilling and keeps the drillsting in tension.
GM Drill Collar has been approved by the NS-1 certification, it is manufactured from 4145H modified quenched and tempered steel, strict metallurgical specifications are followed to insure that full length heat treating produces a consistent maximum depth of hardness.

 

Features and Benefits

 

A hardness range of 285 to 341 BHN and a Charpy impact value of 40 ft-lbs are guaranteed at evenly distributed 16 points in any sections at room temperature; Connections are completed(phosphate coated)to protect them from the elements after machining and to help prevent galling upon initial make-up; Thread roots are cold rolled on API and H-90
connections; Pressed steel thread protectors are supplied for all drill collar that are equipped with standard connections ad protectors are supplied for all drill collar that are equipped with standard connections.

 

 

Specification

Connection Style and Size	OD			ID			Length mm	DF mm	Bending ratio
		mm	in	mm	in
NC23	79.4	3 1/8	31.8	1 1/4	9150	76.2	2.57:1
NC26	88.9	3 1/2	38.1	1 1/2	9150	82.9	2.42:1
NC31	104.8	4 1/8	50.8	2	9150 or 9450	100.4	2.43:1
NC35	120.7	4 3/4	50.8	2	9150 or 9450	114.7	2.58:1
NC38	127	5	57.2	2 1/4	9150 or 9450	121	2.38:1
NC44	152.4	6	57.2	2 1/4	9150 or 9450	144.5	2.49:1
NC44	152.4	6	71.4	2 13/16	9150 or 9450	144.5	2.84:1
NC44	158.8	6 1/4	57.2	2 1/4	9150 or 9450	149.2	2.91:1
NC46	158.8	6 1/4	71.4	2 13/16	9150 or 9450	150	2.63:1
NC46	165.1	6 1/2	57.2	2 1/4	9150 or 9450	154.8	2.76:1
NC46	165.1	6 1/2	71.4	2 13/16	9150 or 9450	154.8	3.05:1
NC46	171.4	6 3/4	57.2	2 1/4	9150 or 9450	159.5	3.18:1
NC50	171.4	6 3/4	71.4	2 13/16	9150 or 9450	159.5	2.37:1
NC50	177.8	7	57.2	2 1/4	9150 or 9450	164.7	2.54:1
NC50	177.8	7	71.4	2 13/16	9150 or 9450	164.7	2.73:1
NC50	184.2	7 1/4	71.4	2 13/16	9150 or 9450	169.5	3.12:1
NC56	196.8	7 3/4	71.4	2 13/16	9150 or 9450	185.3	2.70:1
NC56	203.2	8	71.4	2 13/16	9150 or 9450	190.1	3.02:1
6 5/8REG	209.6	8 1/4	71.4	2 13/16	9150 or 9450	195.7	2.93:1
NC61	228.6	9	71.4	2 13/16	9150 or 9450	212.7	3.17:1
7 5/8REG	241.3	9 1/2	76.2	3	9150 or 9450	223.8	2.81:1
NC70	247.6	9 3/4	76.2	3	9150 or 9450	232.6	2.57:1
NC70	254	10	76.2	3	9150 or 9450	237.3	2.81:1
8 5/8REG	279.4	11	76.2	3	9150 or 9450	266.7	2.84:1

Packing & Delivery