石油鉆桿接頭螺紋

1、GB/T9253.1-1999石油鉆桿接頭螺紋代替GB/T9253.11988Threadsonrotaryshoulderedconnectionsforpetroleumindustry1范圍本標準規(guī)定了數(shù)字型（NC）、內平型（LF）、貫眼型（FH）和正規(guī)型（REG）石油鉆桿接頭螺紋（即帶臺肩連接螺紋，簡稱螺紋）的牙型、基本尺寸、公差和標記。由于數(shù)字型螺紋的牙型和錐度較內平型、貫眼型和正規(guī)型螺紋更合理。在新產品設計時推薦選用數(shù)字型螺紋。本標準適用于井下工具和鉆柱結構件的連接。2引用標準下列標準所包含的條文，通過在本標準中引用而構成為本標準的條文。本標準出版時，所示版本均為有效。所有標準都會

2、被修訂，使用本標準的各方應探討使用下列標準最新版本的可能性。GB/T47491993石油鉆桿接頭螺紋量規(guī)。3定義和符號本標準采用下列定義。3.1 術語3.1.1 數(shù)字型螺紋number（NC）styleconnectionthreads采用V-0.038R螺紋牙型，并以螺紋基面中徑的英寸數(shù)和十分之一英寸數(shù)表示的螺紋。注：NC10-NC16采用V-0.055牙型3.1.2 內平型螺紋internal-flush(IF)styleconnectionthreads采用V-0.065螺紋牙型，內平型鉆桿接頭采用的螺紋。3.1.3 貫眼型螺紋full-hole(FH)styleconnectionth

3、reads采用V-0.040、V-0.050或V0.065螺紋牙型，貫眼型鉆桿接頭采用的螺紋。3.1.4 正規(guī)型螺紋regular(REG)styleconnectionthreads采用V-0.040或V-0.050螺紋牙型，正規(guī)型鉆桿接頭采用的螺紋。3.1.5 緊密距standoff在規(guī)定的條件下，旋合的內外錐螺紋具規(guī)定測量點或面之間的軸向距離。3.2 符號V-0.038R牙底圓弧半徑為0.038in的牙型代號V-0.040牙底為圓弧，牙頂寬度為0.040in的牙型代號V-0.050牙底為圓弧，牙頂寬度為0.050in的牙型代號V-0.055平牙底，牙頂寬度0.055in的牙型代號V-0.

4、065平牙底，牙頂寬度為0.065in的牙型代號P螺距H原始三角形高度hn(hs)內(外)螺紋牙型高度han(has)內(外)螺紋牙頂高度han(Ahas)內(外)螺紋牙頂高偏差hn（Ahs）內（外）螺紋牙型高度偏差Srn（Srs）一內（外）螺紋孤牙底削平高度frn（frs）一內（外）螺紋平牙底削平高度fcn（fcs）內（外）螺紋牙頂削平高度Fcn（Fcs）內（外）螺紋牙頂寬度Frn（Frs）內（外）螺紋牙底寬度rn（rs）內（外）螺紋牙底圓弧半徑r圓角半徑C基面中徑Dl外螺紋大端大徑Dlf外螺紋根部圓柱直徑Ds外螺紋小端大徑Lpc外螺紋錐部長度pcLBt內螺紋有效螺紋長度Lbc內螺紋錐部長度

5、Qc內螺紋擴大錐孔大端直徑Dc內螺紋大端小徑A內外螺紋倒角寬度S校對塞規(guī)與校對環(huán)規(guī)的配對緊密距值Si校對環(huán)規(guī)對工作塞規(guī)的互換緊密距值S2校對塞規(guī)對工作環(huán)規(guī)的互換緊密距值4牙型螺紋牙型應符合圖1和表1的規(guī)定。英制尺寸見附錄A表A1表1石油鉆桿接頭螺紋牙型尺寸牙底削平牙頂牙底牙底圓弧螺距原始三角:于型高度為頂削平高度寬度寬度半徑圓角半徑牙型代號P,mm錐度形高度hn=hs高度Srn=SrsFcn=FcsFrn=Frsrrn=rrsrHfcn=fcsfrn=frsV-0.038R6.3501:65.4873.0951.4260.9651.6510.9650.381V-0.038R6.3501:45.

6、4713.0831.4230.9651.6510.9650.381v-0.0405.0801:44.3762.9930.8750.5081.0160.5080.381v-0.0506.3501:45.4713.7431.0940.6351.2700.6350.381v-0.0506.3501:65.4873.7551.0970.6351.2700.6350.381v-0.0554.2331:83.6601.4201.2091.0311.3971.1940.381v-0.0656.3501:65.4872.8311.4261.2291.6511.4220.381V-0.038RV-0.040和V

7、-0.050螺紋牙型V-0.055和V-0.065螺紋牙型5基本尺寸和公差5.1螺紋的基本尺寸應符合圖2和表2的規(guī)定。英制尺寸見附錄A表A2表2石油鉆桿接頭螺紋基本尺寸外螺紋外螺紋內螺紋擴錐孔外螺紋大根部圓外螺紋錐部內螺紋錐部大端內螺紋螺紋螺紋螺距基面端大徑柱直徑小端長度有效螺長度直徑大端代號牙型(每25.4錐度中徑DlDlf大徑Lpc紋長度LbcQ1)c小徑mm牙數(shù)in/ftC+0.40Ds0LBTmin+9.52+0.70Dcmm-3.18-0.40in數(shù)字型(NC)NC10V-0.0554.233(6)1:827.00030.22625.45138.1041.2853.9830.5827

8、.742NC12V-0.0554.233(6)1:832.13135.35729.79444.4547.6360.3335.7132.873NC13V-0.0554.233(6)1:835.33138.55732.99544.4547.6360.3338.9136.076NC16V-0.0554.233(6)1:840.86944.09438.53244.4547.6360.3344.4841.611NC23V-0.038R4.233(6)1:659.81765.10061.9052.40076.2079.3892.0866.6859.828NC26V-0.038R4.233(6)1:667.

9、76773.05069.8560.35076.2079.8392.0874.6167.778NC31V-0.038R4.233(6)1:680.84886.13182.9671.32388.9092.08104.7887.7180.859NC35V-0.038R4.233(6)1:689.67894.97192.0879.09695.2598.43111.1396.8489.698NC38V-0.038R4.233(6)1:696.723102.00698.0385.065101.60104.76117.48103.5896.734NC40V-0.038R4.233(6)1:6103.4921

10、08.712105.5689.662114.30117.48130.18110.33103.440NC44V-0.038R4.233(6)1:6112.192117.475114.2798.425114.30117.48130.18119.06112.203NC46V-0.038R4.233(6)1:6117.500122.784119.61103.734114.30117.48130.18124.62117.511NC50V-0.038R4.233(6)1:6128.059133.350130.42114.300114.30117.48130.18134.94128.070NC56V-0.0

11、38R4.233(6)1:6142.646149.250144.86117.500127.00130.18142.88150.81143.990NC61V-0.038R4.233(6)1:6156.912163.525159.15128.600139.70142.88155.58165.10158.265NC70V-0.038R4.233(6)1:6179.146185.750181.38147.650152.40155.58168.28187.33180.490NC77V-0.038R4.233(6)1:6196.621203.200198.83161.950165.10168.28180.

12、98204.78197.965正規(guī)型(REG)23/8REGV-0.0405.080(5)1:460.08066.67563.8847.62576.2079.3892.0868.2661.42327/8REGV-0.0405.080(5)1:469.60576.20073.4153.97588.9092.08104.7877.7970.94831/2REGV-0.0405.080(5)1:482.29388.90086.1165.07595.2598.43111.1390.4983.63641/2REGV-0.0405.080(5)1:4110.868117.475114.8890.47510

13、7.95111.13123.83119.06112.21151/2REGV-0.0506.350(4)14132.944140.208137.41110.058120.65123.83136.53141.68133.63065/8REGV-0.0506.350(4)1:6146.248152.197149.40131.093127.00130.18142.88153.99145.60175/8REGV-0.0506.350(4)1:4170.549177.800175.00144.475133.35136.53149.23180.18171.23585/8REGV-0.0506.350(4)1

14、:4194.731201.981199.14167.843136.53139.70152.40204.38195.417貫眼型(FH)31/2FHV-0.0406.350(5)1:494.844101.44877.62295.2598.43111.13102.7996.18741/2FHV-0.0656.350(4)1:6103.429108.712105.5689.662114.30117.48130.18110.33103.44041/2FHV-0.0406.350(5)1:4115.113121.71796.317101.60104.78117.48123.83116.45651/2FH

15、V-0.0506.350(4)1:6142.011147.955126.797127.00130.18142.88150.02141.36465/8FHV-0.0506.350(4)1:6165.598171.526150.368127.00130.18142.88173.83164.951外螺紋外螺紋內螺紋擴錐孔外螺紋大根部圓外螺紋錐部內螺紋錐部大端內螺紋螺紋螺紋螺距基面端大徑柱直徑小端長度有效螺長度直徑大端代號牙型(每25.4錐度中徑DlDlf大徑Lpc紋長度LbcQ1)c小徑mm牙數(shù)in/ftC+0.40Ds0LBTmin+9.52+0.70Dcmm-3.18-0.40in內平型（IF）

16、23/8IFV-0.0656.350(4)1:667,76773,05069.8560,35076.2079.3892.0874.6167,77827/8IF/-0.0656.350(4)1:680,84886,13182.9671,32388.9092.08104.7887.7180,85931/2IFV-0.0656.350(4)1:696,723102,00698.8385,065101.60104.78117.48103.5896,7344IF/-0.0656.350(4)1:6117,500122,784119.61103,734114.30117.48130.18124.62117

17、,51141/2IF/-0.0656.350(4)1:6128,059133,350130.42114,300114.30117.48130.18134.94128,07051/2IF/-0.0656.350(4)1:6157,201162,484141,326127,000130.18142.88163.91157,2121）對NC10NC16Qc極限偏差為土0.13mm,所有螺紋的擴錐孔部分的錐度與螺紋的錐度相同，該孔允許加工成直孔，直孔尺寸和偏差與錐孔大端相同O5.2公差螺距極限偏差在完整螺紋范圍內任一段沿軸向25.4mm的螺距累積偏差為士0.038mm。在完整螺紋整個范圍內螺距累積偏差

18、為士0.114mm,或以螺紋總長度的1/1000計算，兩者取其大值。牙側角極限偏差：士45'。牙型高度和牙頂高的極限偏差應符合圖3、表3的規(guī)定。圖3牙型高和牙頂高極限偏差表3牙型高和牙頂高極限偏差螺距牙頂（Wjhan=has牙型高hn=hsAhan=AhasAhn=Ahs4.2330+0.06-0.0805.0800+0.08-0.12006.3500+0.120-0.1800注：本表規(guī)定的極限偏差用于螺紋刀具設計時僅供參考。在完整螺紋范圍內，折算到304.8mm軸向長度上，螺紋中徑圓錐的平均錐度的極限偏差為：外螺紋：上偏差為+0.762mm,下偏差為0。內螺紋：上偏差為0,下偏差為-

19、0.762mm。緊密距極限偏差內外螺紋除滿足5.2.15.2.4的單項公差要求外，最終檢驗應用符合GB/T4749的量規(guī)檢測其緊密距作為合格與否的依據(jù)，合格的校對規(guī)是檢測工件螺紋的基準。合格的校對環(huán)規(guī)是檢測工件螺紋的轉換基準。用工作規(guī)檢測工件螺紋的緊密距時要把工作規(guī)與校對規(guī)的傳遞誤差考慮進去，校對規(guī)通過Si,S2值把誤差傳遞給工作規(guī)。用校對規(guī)和工作規(guī)檢測工件螺紋時應符合圖4規(guī)定。圖4中的緊密距值是指非涂復的一般鉆柱連接螺紋，對于涂復螺紋和帶密封元件的鉆柱構件和鉆頭連接螺紋其緊密距值可與圖4不同。圖4校對規(guī)和工作規(guī)與工件螺紋緊密距螺紋結構的其他尺寸公差和形位公差應符合圖2、表2的規(guī)定。6螺紋互換

20、性和特殊結構可互換的連接螺紋數(shù)字型的V-0.038R牙型的螺紋可與相同基面中徑的V-0.065牙型的螺紋互換?；Q的螺紋如下：NC26與23/8IFNC31與27/8IFNC38與31/2IFNC40與4IFNC46與4IFNC50與41/2IF特殊結構對鉆鋌和小規(guī)格鉆柱(NC10NC16)連接螺紋，其內外螺紋的收尾部分可根據(jù)需要加工密封梢、應力分散梢、密封錐等特殊結構。7標記石油鉆桿接頭螺紋用表2中的螺紋代號作為螺紋標記，左旋螺紋代號后加注“LH”例：41/2REG-LHNC50(41/2IF)表示可互換的螺紋，其牙型可加工成V-0.038R,也可加工成V-0.065NC50表示只能加工成V

21、-0.038R牙型的數(shù)字型螺紋。41/2IF表示牙型為V-0.065的內平型螺紋。對于可互換的螺紋，如果只標注內平或貫眼螺紋代號，(加上例中的41/2IF)允許牙型加工成V-0.038R。附錄A（標準的附錄）石油鉆桿接頭螺紋英制尺寸A1螺紋牙型的尺寸按表A1。表A1牙型尺寸12345678910牙型代號錐度in/ft原始三角形高度H牙型高度hn=hs牙底削平高度fcn=fcs牙頂削平高度fcn=fcs牙頂寬度Fcn=Fcs牙底寬度Frn=Frs牙底圓弧半徑rrn=rrs圓角半徑rinV-0.038R20.2160050.1218440.0380000.0561610.0650.0380.015

22、V-0.038R30.2153790.1213810.0380000.0559980.0650.0380.015v-0.04030.1723030.1178420.020000.0344610.0400.0200.015v-0.05030.2153790.1473030.0250000.0430750.0500.0250.015v-0.05020.2160050.1478040.0250000.0432010.0500.0250.015v-0.05511/20.14410.05590.04060.04760.0550.0470.015v-0.06520.2160050.1115490.0483

23、850.0561610.0650.0560.015A2石油鉆桿接頭螺紋英制尺寸按表A2。表A2螺紋基本尺寸外螺紋外螺紋內螺紋擴錐孔外螺紋大根部圓外螺紋錐部內螺紋錐部大端螺紋螺紋每英基面中徑端大徑柱直徑小端長度有效螺長度直徑代號牙型寸的錐度CDlDlf大徑Lpc紋長度LbcQ%牙數(shù)in/ft+1/64Ds0Lbt+3/8+1/32-1/80-1/64in數(shù)字型（NC）NC10V-0.05561/1/21.0631.1901.00211/215/821/81.204NC12V-0.05561/1/21.2651.3921.17313/417/823/81.406NC13V-0.05561/1/21

24、.3911.5181.29913/417/823/81.532NC16V-0.05561/1/21.6091.7361.51713/417/823/81.751NC23V-0.038R422.355002.5632.4372.063331/835/825/8NC26V-0.038R422.668002.8762.7502.376331/835/8215/16NC31V-0.038R423.183003.3913.2662.80831/235/841/8329/64NC35V-0.038R423.531003.7393.6253.11433/437/843/8313/16NC38V-0.038R

25、423.808004.0163.8913.349441/845/845/64NC40V-0.038R424.072004.2804.1563.53041/245/851/8411/32螺紋代號螺紋牙型每英寸的牙數(shù)錐度in/ft基面中徑C外螺紋大端大徑Dl外螺紋根部圓柱直徑Dlf+1/64外螺紋小端大徑Ds外螺紋錐部長度Lpc0-1/8內螺紋有效螺紋長度Lbt內螺紋錐部長度Lbc+3/80擴錐孔大端直徑Q1)c+1/32-1/64in數(shù)字型(NC)NC44V-0.038R424.417004.6254.4993.87541/245/851/8411/16NC46V-0.038R424.62600

26、4.8344.7094.08441/245/851/8429/32NC50V-0.038R425.041005.2505.1354.50041/245/851/855/16NC56V-0.038R435.616005.8765.7034.626551/855/8515/16NC61V-0.038R436.178006.4386.2665.06351/255/861/861/2NC70V-0.038R437.053007.3137.1415.813661/865/873/4NC77V-0.038R437.741008.0007.8286.37661/265/861/881/16正規(guī)型(REG)23/8REGV-0.040532.365372.6252.5151.875331/835/8211/1627/8REGV-0.040532.740373.0002.8902.12531/235/841/831/1631/2REGV-0.040533.239873.5003.3902.5