钻具接头扣型对照表

每英寸扣数公扣小头直径460.35mm471.31mm485.06mm489.06mm498.42mm4103.73mm4114.30mm4117.50mm4126.6mm4147.65mm4161.85mm547.62mm553.97mm565.07mm590.47mm4110.06mm4131.03mm4144.47mm4167.84mm577.62mm489.66mm496.31mm4126.79mm4150.37mm460.35mm471.31mm485.06mm4141.32mm211A×210A211×210311×310511×510321×320421A×420A421×420521×520621×620731×730831×830NC44=4＂NC46=4＂IFNC50=41/2＂IFNC56国内现场叫法API标准接头扣型NC26=23/8＂NC31=27/8＂NC38=31/2＂NC40=4＂4A11×4A1027/8＂REG31/2＂REG41/2＂REGNC7723/8＂REG211×210A211×210311×310411×41051/2＂REGNC61NC70231A×231A231×230331×33065/8＂REG75/8＂REG85/8＂REG431×430531×530631×63065/8＂FH31/2＂FH4＂FH=NC4041/2＂FHAPI接头扣型与国内名称对照表注：IF=inetrnal表示内平FH=fullhole表示贯眼REG=regual表示正规NC表示数字23/8＂IF=NC2627/8＂IF=NC3131/2＂IF=NC3851/2＂IF51/2＂FH母扣台肩内径74.61mm87.71mm103.58mm110.33mm119.06mm124.61mm134.91mm150.81mm165.10mm187.33mm204.79mm68.20mm77.78mm90.48mm119.06mm141.68mm153.99mm180.18mm204.39mm102.79mm110.33mm123.83mm150.02mm173.83mm74.61mm87.71mm103.58mm163.91mmAPI接头扣型与国内名称对照表注：IF=inetrnal表示内平FH=fullhole表示贯眼REG=regual表示正规NC表示数字