| Customized: | Customized |
|---|---|
| Surface Treatment: | Spray |
| Type: | Spiral Drill Collar |
| Standard: | API |
| Usage: | Oil Mining, Coal Mining, Well Drilling |
| Material: | AISI 4145h Alloy Steel |
| Customization: |
|---|
Suppliers with verified business licenses
Audited Supplier Drill collar as one component of a drill string is extremely industrial tubulars used to drill into ground to provides weight on bit for drilling. It is used to conjunction with drill pipe. There are slick and spiral grooved types mainly. Our manufacturing process is certified to API spec 7-1. The drill collar is made of AISI 4145 H or 4145 H Modified alloy steel. Bores are trepanned from one direction with no mismatch. All drill collars are heat-treated with hardness within 285 to 341 BHN, which are guaranteed one inch below the surface of the pipe.
Non-magnetic drill collars offer strength and hardness while preventing magnetic interference that may impair accuracy of magnetic surveys. It is manufactured from special steel material with low permeability, high mechanical properties and superior resistance to corrosion cracking.
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Drill Collar Technical Specification Sheet
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Slick drill collar
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Size
(in)
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O.D
(mm)
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I.D.
(mm)
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Code
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Thread
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Length
(mm)
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Weight
(kg)
|
|
3 1/8
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79.4
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31.8(1-1/4)
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NC23-31
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NC23
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9140
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298
|
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3 1/2
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88.9
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38.1(1-1/2)
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NC26-35
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NC26
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9140
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364
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4 1/8
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104.8
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50.8(2)
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NC31-41
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NC31
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9140/9450
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474/490
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4 3/4
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120.6
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50.8(2)
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NC35-47
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NC35
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9140/9450
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674/697
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5
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127
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57.2(2-1/4)
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NC38-50
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NC38
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9140/9450
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725/749
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6
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152.4
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57.2(2-1/4)
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NC44-60
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NC44
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9140/9450
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1125/1163
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6
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152.4
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71.4(2-13/16)
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NC44-60
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NC44
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9140/9450
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1022/1056
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6 1/4
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158.8
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57.2(2-1/4)
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NC44-62
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NC44
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9140/9450
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1237/1279
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6 1/4
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158.8
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71.4(2-13/16)
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NC46-62
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NC44
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9140/9450
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1134/1172
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6 1/2
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165.1
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57.2(2-1/4)
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NC46-65
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NC46
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9140/9450
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1352/1398
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6 1/2
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165.1
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71.4(2-13/16)
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NC46-65
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NC50
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9140/9450
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1249/1291
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6 3/4
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171.4
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57.2(2-1/4)
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NC46-67
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NC46
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9140/9450
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1471/1521
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7
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177.8
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57.2(2-1/4)
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NC50-70
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NC50
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9140/9450
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1597/1651
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7
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177.8
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71.4(2-13/16)
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NC50-70
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NC50
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9140/9450
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1494/1545
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7 1/4
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184.2
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71.4(2-13/16)
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NC50-72
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NC50
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9140/9450
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1625/1680
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7 3/4
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196.8
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71.4(2-13/16)
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NC56-77
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NC56
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9140/9450
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1895/1960
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8
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203.2
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71.4(2-13/16)
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NC56-80
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NC56/6-5/8REG
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9140/9450
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2040/2109
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8 1/4
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209.6
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71.4(2-13/16)
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6-5/8REG
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6-5/8REG
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9140/9450
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2188/2263
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9
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228.6
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71.4(2-13/16)
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NC61-90
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NC61
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9140/9450
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2658/2748
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9 1/2
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241.3
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76.2(2-13/16)
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7-5/8REG
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7-5/8REG
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9140/9450
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2954/3054
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9 3/4
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247.6
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76.2(3)
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NC70-97
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NC70
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9140/9450
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3127/3234
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10
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254
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76.2(3)
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NC70-100
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NC70
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9140/9450
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3308/3421
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11
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279.4
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76.2(3)
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8-5/8REG
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8-5/8REG
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9140/9450
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4072/4210
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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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** Drill collar can be customized as per customer's design.
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Spiral Drill Collar
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OD (in)
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4 3/4
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6 1/4
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6 3/4
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7 1/4
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7 1/2
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8
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9 1/2
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10
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11
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Depth of Cut (in)
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7/32
±1/32
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9/32
±1/16
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5/16
±1/16
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11/32
±1/16
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11/32
±1/16
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3/8
±1/16
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13/32
±3/32
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7/16
±3/32
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15/32
±3/32
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Spiral Pitch (in)
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38
±1
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42
±1
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46
±1
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64
±1
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64
±1
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68
±1
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72
±1
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76
±1
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80
±1
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** Drill collar can be customized as per customer's design.
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Non-Magetic Drill Collar
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Grade
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Minimum Tensile Strength
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psi
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Mpa
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1
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90000
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621
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2
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9000
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621
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3
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115000
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793
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**Non-magetic drill collar can be customized as per customer's design. The size please refer to the sizes of drill collar.
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Pre-Sales Service After-Sales Service
* Transaction Level Five Stars * Supplier Service Service Five Stars
* Response Rate 86.5% * On-time Shipment Five Stars
* Response Time<12h * Product Quality Five Stars
Suppliers with verified business licenses
Audited Supplier 
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