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Non-magnetic drill collar
The non-magnetic drill collar is made of a low-carbon high-chromium-manganese alloy steel, which is refined after strict chemical composition ratio and forged to achieve its mechanical properties. It has good mechanical properties of low magnetic permeability and high strength.
无磁钻铤
无磁钻铤是使用一种低碳高铬锰合金钢制成，它是经过严格的化学成分配比后精炼并通过锻造而达到其机械性能。具有良好的低磁导率、高强度的机械性能。
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无磁钻铤技术参数
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Non-magnetic Drill Collar
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Thread
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OD (inch)
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ID (inch)
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Length (mm)
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Bevel OD (mm)
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Bend & Strength Rate
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NC23-31
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3-1/8"
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1-1/4"
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9150
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76.2
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2.57:1
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NC26-35
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3-1/2"
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1-1/2"
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9150
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82.9
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2.42:1
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NC31-41
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4-1/8"
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2"
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9150
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100.4
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2.43:1
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NC35-47
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4-3/4"
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2"
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9150
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114.7
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2.58:1
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NC38-50
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5"
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2-1/4"
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9150
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121
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2.38:1
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NC44-60
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6"
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2-1/4"
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9150/9450
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144.5
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2.49:1
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NC44-60
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6"
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2-13/16"
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9150/9450
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144.5
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2.84:1
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NC44-62
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6-1/4"
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2-1/4"
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9150/9450
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149.2
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2.91:1
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NC44-62
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6-1/4"
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2-13/16"
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9150/9450
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150
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2.63:1
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NC44-65
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6-1/4"
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2-1/4"
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9150/9450
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154.8
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2.76:1
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NC44-65
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6-1/2"
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2-13/16"
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9150/9450
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154.8
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3.05:1
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NC44-67
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6-3/4"
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2-1/4"
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9150/9450
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159.5
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3.18:1
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NC50-67
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6-3/4"
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2-13/16"
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9150/9450
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159.5
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2.37:1
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NC50-70
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7"
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2-1/4"
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9150/9450
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164.7
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2.54:1
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NC50-70
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7"
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2-13/16"
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9150/9450
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164.7
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2.73:1
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NC50-72
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7-1/4"
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2-13/16"
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9150/9450
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169.5
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3.12:1
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NC56-77
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7-3/4"
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2-13/16"
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9150/9450
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185.3
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2.70:1
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NC56-80
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8"
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2-13/16"
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9150/9450
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190.1
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3.02:1
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6-5/8"REG
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8-1/4"
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2-13/16"
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9150/9450
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195.7
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2.93:1
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NC61-90
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9"
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2-13/16"
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9150/9450
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212.7
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3.171:1
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7-5/8"REG
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9-1/2"
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3"
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9150/9450
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223.8
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2.81:1
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NC70-97
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9-3/4"
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3"
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9150/9450
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232.6
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2.57:1
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NC70-100
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10"
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3"
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9150/9450
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237.3
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2.81:1
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8-5/8"REG
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11"
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3"
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9150/9450
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266.7
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2.84:1
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