Coal Mining Accessories Drill Rods Steel Spiral Non-Magnetic Drill Collars

• Manufacturing Process: Forging
• Surface Treatment: Spray-Paint
• Material: Non-Magnetic Material
• Use: Well Drilling
• Machine Type: Drilling Tool, Drilling Tool
• Application: Oil and Gas Well Drilling
• Applicable Industries: Energy & Mining
• Processing Type: Forging
• Product Name: Drill Collar Spiral Drill Collar and Non Magnetic
• Type: Drill Collar
• Color: Blue
• Transport Package: Export Wooden Box
• Specification: standard
• Trademark: LFM
• Origin: Cn
• Production Capacity: 1500

Product Description

Standard spiral drill collar for well drilling
 

Product Parameters

 

Drill collar Number and Connection (mm)	Outside Diameter (mm)	Bore Diameter (mm)	Length (mm)	Shoulder guide angle diameter mm
NC23-31	79.4	31.8	9150	76.2
NC26-35	88.9	38.1			82.9
NC31-41	104.8	50.8			100.4
NC35-47	120.7	50.8			114.7
NC38-50	127	57.2			121
NC44-60	152.4	57.2	9150 or 9450	144.5
NC44-60	152.4	71.4			144.5
NC46-62	158.8	57.2			149.2
NC46-62	158.8	71.4			150
NC46-65	165.1	57.2			154.8
NC46-65	165.1	71.4			154.8
NC46-67	171.4	57.2			159.5
NC50-67	171.4	71.4			159.5
NC50-70	177.8	57.2			164.7
NC50-70	177.8	71.4			164.7
NC50-72	184.2	71.4			169.5
NC56-77	196.8	71.4			185.3
NC56-80	203	71.4			190.1
6-5/8REG	209.6	71.4			195.7
NC61-90	228.6	71.4			212.7
7-5/8REG	241.3	76.2			223.8
NC70-97	247.6	76.2			232.6
NC70-100	254	76.2			237.3
8-5/8REG	279.4	76.2			266.7

4145H Spiral Drill Collar R2 length for well drilling

I. Drill collar Types

Normally we are supply 4 types of drill collars as below:

A. Slick Drill Collar

Note: Drill collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension. Especially drill collar can keep drill bit centralized and hole track by large rigidity. The Drill collar are manufactured strictly from API Spec7-1 and SY5411 standard.

B. Spiral Drill Collar

Note: Spiral drill collar is used to reduce contact area with hole so as to avoid efficiently bit sticking from diffirential pressure. The drill collars are manufactired strictly according to API Spec7-1 and Standard SY5144

C. Spiral Drill Collar With Elevator Groove And Slip Groove

Note: Elevator groove and slip groove made on box thread face of slick drill collar or spiral drill collar can be used as lifting sub and safety slip when trip out. The technical parameters for elevator groove and slip groove is as per API SPEC7-1. Hardbanding is optional at customers' requests.

D. Non-magnetic Drill Collar

The as cold rooled finish on both ID and OD surface with unique technical process strengthen the structure and ensures the tools with optimal resistance to stress,corrosion,cracking and the mechanical performance is greatly enganced.

Nominal size	D		d		L mm	DF(mm)	Bending Strength ratio
	mm	In	mm	in
NC31-41(2-7/8IF)	104.8	4-1/8	50.8	2	9150	100.4	2.43:1
NC35-47	120.7	4-3/4	50.8	2	9150	114.7	2.58:1
NC38-50(3-1/2IF)	127.0	5	57.2	2-1/4	9150	121.0	2.38:1
NC44-60	152.4	6	57.2	2-1/4	9150/9450	144.5	2.49:1
NC44-60	152.4	6	71.4	2-13/16	9150/9450	144.5	2.84:1
NC44-62	158.8	6-1/4	57.2	2-1/4	9150/9450	149.2	2.91:1
NC46-62(4IF)	158.8	6-1/4	71.4	2-13/16	9150/9450	150.0	2.63:1
NC46-65(4IF)	165.1	6-1/2	57.2	2-1/4	9150/9450	154.8	2.76:1
NC46-65(4IF)	165.1	6-1/2	71.4	2-13/16	9150/9450	154.8	3.05:1
NC46-67(4IF)	171.4	6-3/4	57.2	2-1/4	9150/9450	159.5	3.18:1
NC50-67(4-1/2IF)	171.4	6-3/4	71.4	2-13/16	9150/9450	159.5	2.37:1
NC50-70(4-1/2IF)	177.8	7	57.2	2-1/4	9150/9450	164.7	2.54:1
NC50-70(4-1/2IF)	177.8	7	71.4	2-13/16	9150/9450	164.7	2.73:1
NC50-72(4-1/2IF)	184.2	7-1/4	71.4	2-13/16	9150/9450	169.5	3.12:1
NC56-77	196.8	7-3/4	71.4	2-13/16	9150/9450	185.3	2.70:1
NC56-80	203.2	8	71.4	2-13/16	9150/9450	190.1	3.02:1
6-5/8REG	209.6	8-1/4	71.4	2-13/16	9150/9450	195.7	2.93:1
NC61-90	228.6	9	71.4	2-13/16	9150/9450	212.7	3.17:1
7-5/8REG	241.3	9-1/2	76.2	3	9150/9450	223.8	2.81:1
NC70-97	247.6	9-3/4	76.2	3	9150/9450	232.6	2.57:1
NC70-100	254.0	10	76.2	3	9150/9450	237.3	2.81:1

PICTURES FOR REFERNCE

 

 

Product Description

 

 

Our Advantages

 

Certifications

 

Packaging & Shipping

FAQ

 

Q1: What's your packing?
A:  Regular packing.

Q2: What's your delivery?
A:  Normally, about 30-45 days.

Q3:  What are the shipping methods?
A: Ocean shipment to the port near from you; Air shipment to the shipment near from your company; Door to door service by  international express.

Q4:  What about the payment options?
 A: In general, we accept T/T. 

Q5:  When can I get the price?
A: We usually quote within 24 hours after we get your inquiry. If you are very urgent to get the price,please call us or tell us in  your  email so that we will detail with your inquiry priority.