API Standard Drill Collars of Slick, Spiral and Non-Magnetic Type

• Customization: Available
• After-sales Service: Online Service
• Warranty: 1 Year
• Model NO.: drill Collar
• Manufacturing Process: Forging
• Surface Treatment: Spray-Paint
• Operation Pressure: Atmospheric Pressure
• Material: Cast Steel
• Machine Type: Drill Collar
• Application1: Energy & Mining/Petroleum Machinery Parts
• Od (mm): 79.4-279.4
• Od (in): 3-1/2′′ to 11′′
• Type: Magnetic Non Magnetic
• Transport Package: Wooden Box
• Specification: CUSTOM MADE
• Trademark: JX PETRO
• Origin: Dongying
• HS Code: 84314310
• Production Capacity: 2000PCS/Month

Product Description

Product Description

Drill Collar

Drill Collar is the basic component in the BHA which provides weight on the bit for drilling and keeps the drill string in tension. JX Petro Drill Collar is manufactured from AISI 4145H modified quenched and tempered steel and is heat treated along its entire length for uniform toughness and durability. Strict metallurgical tests are performed per specifications to ensure that the heat treatment produces consistent and maximum hardness through the depth of the bar. 

we could supply slick type drill collar, spiral drill collar and Non-magnetic drill collar (NMDC).

Features:
1. Hardness range of 285 to 341 BHN and a Charpy impact value of 40ft/lbs are guaranteed for evenly distributed 16 points in any cross sections at room temperature.
2. Connections as phosphate coated father machining to protect the threads from corrosive elements and to prevent galling upon initial make -up. Thread roots are cold rolled on API and H0-90 connections.
3. Pressed steel thread protectors are supplied to all drill collar that are equipped with standard connections.
4. Manufactured strictly according to API standard.
5. Widely used in oil, gas, HDD and geothermal field. 

Specifics:

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.

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FAQ

1) How can I place order?

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

2) How can I pay you?

A: After you confirm our PI, we will request you to pay. T/T and Western Union are the most usual ways we are using.

3) 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 15-25days 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.

4)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.

5)How do you check all the goods in the production line?

A: We have spot inspection and finished product inspection. We check the goods when they go into next step production procedure.