API Drill Collar and Non Magnetic Drill Collar

• After-sales Service: Yes
• Warranty: 1 Year
• Manufacturing Process: Casting
• Surface Treatment: Galvanized
• Operation Pressure: Atmospheric Pressure
• Material: Alloy
• Transport Package: Bulk
• Specification: 3-1/8 3-1/2 4-1/8 4-3/4 5 6 6-1/4 6-1/2 6-3/4 7
• Trademark: ZX
• Origin: China

Product Description

Product Description

(1)Eccentric-weight drill collar is an effective anti-deviation drilling tool,with high drill pressure used in oblique areas,rectifying oblique as well.

(2)When drilling directional wells eccentric-weight drill collar is an effective tool to reduce oblique or straighten the well hole using high drilling pressure.

(3)Eccentric-weight drill collar has the advantages of simple structure,convenient use,connected directly to common drill collar without centralizers,greatly convenient for sinking in,fishing and milling operations.

(4)Eccentric-weight drill collar runs downhole safely,danger of leakage or bit freezing hard to appear.

(5)Pay much attention to avoid mud balling and prevent effect of anti-deviation .

1. Material: P550,P540,P530

2. Shape: It is the round pipe with smooth surface and thick wall, and the both ends are machined screw thread for connection.

3. Use: It is mainly used for the inspection in the process of petroleum drilling.

4. Standard: API Spec 7-1 or SY/T5144 Standard.

5. Inspection&Test: When producing, traceability are maintained from the receipt of raw material to completion of final products, and serial numbers are die-stamped on each workpiece body. During each manufacturing process, inspection and test are performed.

6. Magnetic permeability(MPS=1×105/4∏A/m)

 1). Average: Ur<1.010.

 2). Magnetic Field Gradient: ΔB≤0.05μT.

Product Parameters

Size	O.D(mm)	I.D.(mm)	Code	Thread	Length(mm)	Weight(kg)
3-1/8	79.4	31.8(1-1/4)	NC23-31	NC23	9140	298
3-1/2	88.9	38.1(1-1/2)	NC26-35	NC26	9140	364
4-1/8	104.8	50.8(2)	NC31-41	NC31	9140/9450	474/490
4-3/4	120.6	50.8(2)	NC35-47	NC35	9140/9450	674/697
5	127	57.2(2-1/4)	NC38-50	NC38	9140/9450	725/749
6	152.4	57.2(2-1/4)	NC44-60	NC44	9140/9450	1125/1163
		71.4(2-13/16)	NC44-60		9140/9450	1022/1056
6-1/4	158.8	57.2(2-1/4)	NC44-62	NC44	9140/9450	1237/1279
		71.4(2-13/16)	NC46-62		9140/9450	1134/1172
6-1/2	165.1	57.2(2-1/4)	NC46-65	NC46	9140/9450	1352/1398
		71.4(2-13/16)	NC46-65	NC50	9140/9450	1249/1291
6-3/4	171.4	57.2(2-1/4)	NC46-67	NC46	9140/9450	1471/1521
7	177.8	57.2(2-1/4)	NC50-70	NC50	9140/9450	1597/1651
		71.4(2-13/16)	NC50-70		9140/9450	1494/1545
7-1/4	184.2	71.4(2-13/16)	NC50-72	NC50	9140/9450	1625/1680
7-3/4	196.8	71.4(2-13/16)	NC56-77	NC56	9140/9450	1895/1960
8	203.2	71.4(2-13/16)	NC56-80	NC56/6-5/8REG	9140/9450	2040/2109
8-1/4	209.6	71.4(2-13/16)	6-5/8REG	6-5/8REG	9140/9450	2188/2263
9	228.6	71.4(2-13/16)	NC61-90	NC61	9140/9450	2658/2748
9-1/2	241.3	76.2(2-13/16)	7-5/8REG	7-5/8REG	9140/9450	2954/3054
9-3/4	247.6	76.2(3)	NC70-97	NC70	9140/9450	3127/3234
10	254	76.2(3)	NC70-100	NC70	9140/9450	3308/3421
11	279.4	76.2(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

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