4145h Spiral Drill Collar R2 Length for Well Drilling

• Customized: Customized
• Surface Treatment: Spray
• Type: Non-magnetic Drill Collar
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: all size
• Standard: AISI, API
• Usage: Oil Mining, Coal Mining, Well Drilling, Ore Mining
• Material: 4145h
• Length: Customized
• Raw Material: 4145h
• Application: Drilling String
• Advantage: High Quality Raw Material
• Thread Type: Nc, If, Reg, Fh, Tx39 etc
• Transport Package: Iron Frame
• Specification: API Standard
• Trademark: Lake
• Origin: China
• HS Code: 8431431
• Production Capacity: 10000PCS/Year
• Package Size: 950.00cm * 100.00cm * 100.00cm
• Package Gross Weight: 400.000kg

Product Description

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.

II. Specification:  
 

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

 

III. PICTURES FOR REFERNCE
 

IV. FAQ

How can I place order? 

A: You can contact us by email about your order details, or place order on line. 

How can I pay you? 
A: After you confirm our PI, we will request you to pay. T/T (HSBC bank), L/C, D/P, Western Union are the most usual ways we are using. If you want to use other way, please tell me, we can discuss.

What's the order procedure? 
A: First we discuss order details, production details by email or TM. Then we issue you an PI for your confirmation. You will be requested to do pr-epaid full payment or deposit before we go into production. After we get the deposit, we start to process the order. We usually need 7-15days if we don't have the items in stock. Before production has been finished, we will contact you for shipment details, and the balance payment. After payment has been settled, we start to prepare the shipment for you. 

How do you take care when your clients received defective products? 
A: replacement. If there are some defective items, we usually credit to our customer or replace in next shipment.