API Standard Drilling Rig Equipment Accessories Drill Collars for Oilfield Well

• After-sales Service: 1year
• Warranty: 1year
• Manufacturing Process: Forging
• Surface Treatment: Polishing
• Operation Pressure: Atmospheric Pressure
• Material: Alloy
• Certificate: API
• Type: Pipe
• Transport Package: /
• Specification: /
• Trademark: /
• Origin: /
• Production Capacity: 50000pieces/Year

Product Description

 

Product Description

Drill Collars are integral heavy-wall joints that are manufactured from a solid bar of modified alloy steel. The solid bars are quenched and tempered to obtain the required mechanical properties, then trepanned, drifted and threaded. All drill collars are heat-treated with hardness within 285 to 341 BHN, which are guaranteed one inch below the surface of the pipe.
Lake Petroleum could supply slick type drill collar, spiral drill collar and Non-magnetic drill collar (NMDC).

 

Product Parameters

Size (in)	O.D (mm)	I.D. (in)	Code	Thread	Length (mm)	Weight (kg)
3 1/8	79.4	1-1/4	NC23-31	NC23	9140	298
3 1/2	88.9	1-1/2	NC26-35	NC26	9140	364
4 1/8	104.8	2	NC31-41	NC31	9140/9450	474/490
4 3/4	120.6	2	NC35-47	NC35	9140/9450	674/697
5	127	2-1/4	NC38-50	NC38	9140/9450	725/749
6	152.4	2-1/4	NC44-60	NC44	9140/9450	1125/1163
6	152.4	2-13/16	NC44-60	NC44	9140/9450	1022/1056
6 1/4	158.8	2-1/4	NC44-62	NC44	9140/9450	1237/1279
6 1/4	158.8	2-13/16	NC46-62	NC44	9140/9450	1134/1172
6 1/2	165.1	2-1/4	NC46-65	NC46	9140/9450	1352/1398
6 1/2	165.1	2-13/16	NC46-65	NC50	9140/9450	1249/1291
6 3/4	171.4	2-1/4	NC46-67	NC46	9140/9450	1471/1521
7	177.8	2-1/4	NC50-70	NC50	9140/9450	1597/1651
7	177.8	2-13/16	NC50-70	NC50	9140/9450	1494/1545
7 1/4	184.2	2-13/16	NC50-72	NC50	9140/9450	1625/1680
7 3/4	196.8	2-13/16	NC56-77	NC56	9140/9450	1895/1960
8	203.2	2-13/16	NC56-80	NC56 or 6- 5/8REG	9140/9450	2040/2109
8 1/4	209.6	2-13/16	6-5/8REG	6-5/8REG	9140/9450	2188/2263
9	228.6	2-13/16	NC61-90	NC61	9140/9450	2658/2748
9 1/2	241.3	2-13/16	7-5/8REG	7-5/8REG	9140/9450	2954/3054
9 3/4	247.6	3	NC70-97	NC70	9140/9450	3127/3234
10	254	3	NC70-100	NC70	9140/9450	3308/3421
11	279.4	3	8-5/8REG	8-5/8REG	9140/9450	4072/4210
Mechanical properties:  <7 inch Drill Collar: Yield Strength≥758MPa, Tensile Strength≥965MPa, Four times elongation ≥13%, Impact energy Ak≥54J (Single impact work≥47J, Average≥54J), Hardness range: 285HB~341HB ≥7inch Drill Collar: Yield Strength≥689MPa, Tensile Strength≥931MPa, Four times elongation≥13%, Impact energy Ak≥54J (Single impact work≥47J, Average≥54J), Hardness range 285HB~341HB
Drill collar can be customized as per customer's design.

 

Company Profile

Business type	Custom manufacturer	Country / Region	Shandong, China
Main Products	Liner, Piston, Valve Assy, Swivel Joint, Hammer Union	Total employees	11 - 50 People
Total Annual Revenue	2300000	Year established	2011
Major Clients	Confidential	Certifications(3)	ISO 45001, ISO9001, ISO14001
Product Certifications	-	Patents	-
Trademarks	-	Main Markets	Eastern Europe 26.00% Mid East 23.00% North America 15.00%

FAQ

Why you need to choose Lake Petro?
As a professional oil and gas service company, Lake Petro has many good experience in selling and serves for the oilfield
industries for years. Quality is the culture of the company, we provide API and BV certified products for customer.
Can you make us the best quality products as well as a good price.
Yes. we can give you really high quality products with competitive price. We have a better understanding in Chinese market, withus
our money will be safe.
What is special compare with other companies?
First, we provide the quality products, with BV and API certified; At the same time, we provide our customer with the best service
after sale, any time any where.