钻具螺纹扣型辨识.docx

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1、钻具螺纹扣型辨识1、测量工具：数显卡尺、锥度尺或内外卡钳、钢板尺、锥度尺。2、识别内螺纹扣型:测量螺纹开孔最大内经，对照石油钻具接头螺纹尺寸表中内螺纹扩锥孔大端直径。3、识别外螺纹扣型:测量螺纹大端最大外径，对照石油钻具接头螺纹尺寸表中外螺纹锥部大端直径。4、外螺纹有应力减轻槽的测量应力减轻槽直径对照外螺纹应力分散槽直径表。5、若测量数据相近，分辨困难，则测量螺纹锥度，进一步确定。6、以下螺纹可以互换：NC26=2-3/8IF、NC31=2-7/8IF、NC38=3-1/2IF、NC40=4FH、NC46=4IF、NC50=4-1/2IF。外螺纹应力分散槽直径序号螺纹类型标准外螺纹锥部大端直径

2、应力槽直径1NC35 (4-3/4DC)94. 9783.52NC38 (5DC)102. 0089. 103NC40108.7195.814NC44117. 48104. 575NC46 (6T/4DC)122. 78109. 886NC50 (7DC7-3/4DC)133. 35120. 457NC56(8DC)149. 25134. 0485-1/2FH(WDP)148. 00136. 509NC61(9DC)163. 53159. 53石油钻具接头螺纹尺寸螺纹代号纹形螺牙螺距mm(每25.4mm的牙数)锥度基面中径C外螺纹锥部大端直径Dl螺圆根直DLF外纹柱部径外螺纹锥部小端直径Ds外

3、螺纹锥部长度Lpc内螺纹有效螺纹长度Lbt螺锥长LBC内纹部度螺扩孔端径C内纹锥大直Q螺纹公制代 号公扣母扣mm数字型(NC)NC23V-0.038R6.350 (4)1： 659.81765.10061.952.40076.279.492.166.7NC26V-0.038R6.350 (4)1： 667.76773.05069.960.35076.279.492.174.6NC31V-0.038R6.350 (4)1： 680.84886.13183.071.32388.992.1104.887.7NC35V-0.038R6.350 (4)1： 689.68794.97192.179.096

4、95.298.4111.196.8NC38V-0.038R6.350 (4)1： 696.723102.00698.885.065101.6104.8117.5103.6NC40V-0.038R6.350 (4)1： 6103.429108.712105.689.662114.3117.5130.2110.3NC44V-0.038R6.350 (4)1： 6112.192117.475114.398.425114.3117.5130.2119.1NC46V-0.038R6.350 (4)1： 6117.500122.784119.6103.734114.3117.5130.2124.6NC50

5、V-0.038R6.350 (4)1： 6128.059133.350130.4114.300114.3117.5130.2134.9NC56V-0.038R6.350 (4)1： 4142.646149.250144.9117.500127.0130.2142.9150.8NC61V-0.038R6.350 (4)1： 4156.921163.525159.2128.600139.7142.9155.6165.1NC70V-0.038R6.350 (4)1： 4179.146185.750181.4147.650152.4155.6168.3187.3NC77V-0.038R6.350 (4

6、)1： 4196.621203.200198.8161.950165.1168.3181.0204.8正规型(REG)23/sREGV-0.0405.080 (5)1： 460.08066.67563.947.62576.279.492.168.32A312A3027/8REGV-0.0405.080 (5)1： 469.60576.20073.453.97588.992.1104.877.8231230372REGV-0.0405.080 (5)1： 482.29388.90086.165.07595.298.4111.190.53313304%REGV-0.0405.080 (5)1： 4

7、110.868117.475114.790.475107.9111.1123.8119.14314305%REGV-0.0506.350 (4)1： 4132.944140.208137.4110.058120.6123.8136.5141.753153065/8REGV-0.0506.350 (4)1： 6146.248152.197149.4131.039127.0130.2142.9154.063163075/8REGV-0.0506.350 (4)1： 4170.549177.800175.0144.475133.3136.5149.2180.273173085/8REGV-0.050

8、6.350 (4)1： 4194.731201.981199.1167.843136.5139.7152.4204.4831830贯眼型（FH）27/sFHV-0.0405.080 (5)1： 485.48092.07570.075889510594.52212203V2FHV-0.0405.080 (5)1： 494.844101.44877.62295.298.4111.1102.83213204FHV-0.0656.350 (4)1： 6103.429108.712105.689.662114.3117.5130.2110.34A214A204V2FHV-0.0405.080 (5)1：

9、 4115.113121.71796.317101.6104.8117.5123.84214205V2FHV-0.0506.350 (4)1： 6142.011147.955126.797127.0130.2142.9150.052152065/sFHV-0.0506.350 (4)1： 6165.598171.526150.368127.0130.2142.9173.8621620内平型（IF）23/8IFV-0.0656.350 (4)1： 667.76773.05069.960.35076.279.492.174.62A112A1027/8 IFV-0.0656.350 (4)1： 68

10、0.84886.13183.071.32388.992.1104.887.8211210372IFV-0.0656.350 (4)1： 696.723102.00698.885.065101.6104.8117.5103.63113104IFV-0.0656.350 (4)1： 6117.500122.784119.6103.734114.3117.5130.2124.64A114A104V2IFV-0.0656.350 (4)1： 6128.059133.350130.4114.300114.3117.5130.2134.94114105%IFV-0.0656.350 (4)1： 6157.201162.484一141.326127.0130.2142.9163.9511510