1、 Specifications for Rotary Drill Stem Elements API SPECIFICATION 7FORTIETH EDITION,NOVEMBER 2001EFFECTIVE DATE:MARCH 2002 Addendum 1August 2004 EFFECTIVE DATE:FEBRUARY 1,2005 Addendum 1 to Specifications for Rotary Drill Stem Elements 1 Table 26,Column 5,change heading:From:Reference Thread Height,T
2、runcated h n =h s To:Thread Height,Truncated h n =h s +0.001/0.003 Metric Table 26,change heading:From:Reference Thread Height,Truncated h n =h s To:Thread Height,Truncated h n =h s +0.025/0.076 Table 27,make the following changes,add Note 5:Table 28,make the following changes,add Note 5:Table 27Gau
3、ge Dimensions Rotary Shouldered Connections 5 167SizeMajor Dia.Minor Dia.NC232.441012.26900NC262.754012.58200NC313.269013.09700NC353.617013.44500NC383.894013.72200NC404.158013.98600NC444.503014.33100NC464.712014.54000NC505.127714.95570NC565.701385.53062NC616.263386.09262NC707.138386.96762NC777.82638
4、7.65562 5 Gauges made before February 1,2005 may conform to the 2001 40th Editionof API Spec 7.Table 28Gauge Thread Dimensions Rotary Shouldered Connections 5 146910FormTaper h g f cs f cn V-038R20.0976200.0650000.065000V-038R30.0969940.0650000.065000 5 Gauges made before February 1,2005 may conform
5、 to the 2001 40th Edition of API Spec 7.2API S PECIFICATION 7A DDENDUM 1 Metric Table 27,Make the following changes,add Note 5:Metric Table 28,make the following changes,add Note 5:Page 61,H.1,revise the last sentence to read as follows:“.for determining height lead and taper described in this recom
6、mended practice.”Page 62,Table H-1,remove the last sentence from Note 1.Appendix H,add the following new section H.5:H.5Height Measurement H.5.1DEFINITION Height of threads shall be defined as the distance between the crest and root,normal to theaxis of the thread.H.5.2GAUGE CONTACT POINTS The conta
7、ct points for height gauges shall be ball type with a diameter as specified inTable H-2 and shall not contact the thread flank.H.5.3HEIGHT GAUGES Thread height shall be measured with gauges of the type illustrated in Figure H-6 for exter-nal threads and internal threads as size permits,or the type i
8、llustrated in Figure H-7 for small Metric Table 27Gauge Dimensions Rotary Shouldered Connections 5 167SizeMajor Dia.Minor Dia.NC2362.001557.6325NC2669.951765.5827NC3183.032778.6637NC3591.871987.5029NC3898.907794.5387NC40105.6133101.2443NC44114.3763110.0073NC46119.6849115.3159NC50130.2437125.8747NC56
9、144.815140.4778NC61159.0898154.7526NC70181.3148176.9776NC77198.79194.4528 5 Gauges made before February 1,2005 may conform to the 2001 40th Edition of API Spec 7.Metric Table 28Gauge Thread Dimensions Rotary Shouldered Connections 5 146910FormTaper mm/m h g f cs f cn V-038R166.672.4795481.6510001.65
10、1000V-038R250.002.4636481.6510001.651000 5 Gauges made before February 1,2005 may conform to the 2001 40th Edition ofAPI Spec 7.S PECIFICATIONS FOR R OTARY D RILL S TEM E LEMENTS 3 internal threads.Such gauges shall have indicators graduated to register the deviation in threadheight,as illustrated i
11、n Figure H-8.Standard template as shown in Figure H-9 shall be providedfor standardizing the height gauge.The standard templates shall be so constructed as to com-pensate for the error in measuring height parallel to the taper cone instead of parallel to thethread axis.For the U-groove on standard t
12、emplates,the depth of the groove shall conform tothe dimensions shown in Table H-2,column 5,within a tolerance of 0.0002 in.H.5.4ADJUSTMENT Gauges shall be adjusted when applied to the U-groove for the type of thread to be mea-sured.Gauges having indicators for determining deviation in thread height
13、 shall be adjustedto register zero when applied to the applicable groove.For thread height gauges of the typeillustrated in Figure H-7,if the standard template cannot be positioned flat on the anvil withthe pressure arm applied,the arm shall be shifted out of the way to prevent contact with thestand
14、ard template during adjustment of checks.H.5.5PROCEDURE The contact ball shall be placed in the proper thread groove with the anvil in a line parallelto the axis of the thread and resting on the crests of the adjacent threads.For gauges of thetype illustrated in Figure H-6,the gauge shall be oscilla
15、ted through a small arc on each sideof the position normal to the taper cone.For gauges graduated to measure the thread heighterror,the minimum plus reading or maximum minus reading on the indicator shall be takenas the thread height error.For gauges of the type illustrated in Figure H-7,the gauge c
16、an notbe oscillated.Confirm that the gauge is well seated and properly centered in the groovebefore taking reading.Table H-2Thread Height Gauge Standards Dimensions in Inches 123456Thread FormTaper in./ftNumber Threads Per In.Calculated Thread Height(Perpendicular to Taper Cone)Compensated Thread Height(Perpendicular to Taper Cone)Contact Ball Size+0.000 0.002 in.V-038R240.1215540.12160.072V-038R340.1207370.12070.072V-0.040350.1170860.11710.034V-0.050340.1463590.14640.044V-0.050240.1473800.14740
