钻井常用接头识别办法--钻具公英制对照表

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1、钻井常用接头识别办法扣型代号小端直径膛空直径锥度2A11（0）60.3574.61：6211（0）71.3287.71：6311（0）85.06103.61：64A11103.73124.61：6411114.3134.91：6511141.32163.91：622169.8584.91：432177.62102.81：442196.31123.81：44A2189.56110.31：6521126.791501：6621150.37173.81：62A3147.6368.31：423153.9777.81：433165.0790.

2、51：443190.471191：4531110.06141.71：4631131.031541：6731144.47180.21：4831167.8204.41：4ф444.5m=(17-1/2＂)ф311.1mm=(12-1/4＂)ф298.45mm=(11-3/4＂)ф254mm=(10＂)ф244.475mm=(9-5/8＂)ф241.3mm=(9-1/2＂)ф228.6mm=(9＂)ф219.075mm=(8-5/8＂)ф215.9mm=(8-1/2＂)ф209.55mm=(8-1/4＂)ф203mm=(8＂)ф197mm

3、=(7-3/4＂)ф177.8mm=(7＂)ф172mm=(6-3/4＂)ф165mm=(6-1/2＂)ф158mm=(6-1/4＂)ф152.4mm=(6＂)ф139.7mm=(5-1/2＂)ф127mm=(5＂)ф120mm=(4-3/4＂)ф115mm=(4-9/16＂)ф101.6mm=(4＂)ф95mm=(3-3/4＂)ф89mm=(3-1/2＂)ф79mm=(3-1/8＂)ф73mm=(2-7/8＂)各种井眼可下入的钻具（单位均为mm）：名称444.5311.1241.3215.9152.4120无磁钻铤241228.6

4、203228.6203197178165165120101.6或专用无磁抗压缩钻杆马达24522224522219719716516512095稳定器444310241214151120短钻铤241228.6203203178165165120101.6定向接头203228.6203178178165165120101.6接头扣型尺寸接头数字或尺寸对应钻具及钻头国内编码公端根径(mm)公端小径(mm)公扣长度(mm)母扣内径(mm)母扣长度(mm)NC26(2-3/8"IF)2-3/8"DP2A11×2A1073.160.476.2

5、74.679.4NC31(2-7/8"IF)2-7/8"DP211×21086.171.388.987.792.1NC38(3-1/2"IF)3-1/2"DP311×31010285.1101.6103.6104.8NC46(4"IF)4A11×4A10122.8103.7114.3124.6117.5NC50(4-1/2"IF)5"DP411×410133.4114.3114.3134.9117.52-7/8"FH221×22092.170.18894.5953-1/2"FH321×320101.477.695.2102.898.

6、44-1/2"FH421×420121.796.3101.6123.8104.87"DC148126.8127150.5130.25-1/2"FH521×5206-5/8"FH621×620171.5150.4127173.8130.22-3/8"REG3-3/4"BIT2A31×2A3066.747.676.268.379.42-7/8"REG231×23076.25488.977.892.13-1/2"REG6-1/8"BIT331×33088.965.195.290.598.44-1/2"REG8-1/2"BIT431×430

7、117.590.5108119.1111.1140.2110.1120.6141.7123.85-1/2"REG531×5306-5/8"REG12-1/4"BIT/8"DC631×630152.2131127154130.27-5/8"REG17-1/2"BIT731×730177.8144.5133.4180.2136.58-5/8"REG831×830202167.8136.5204.4139.7