1、Specification for Threading and Gauging of Rotary ShoulderedThread ConnectionsANSI/API SPECIFICATION 7-2 (FORMERLY IN SPEC 7)FIRST EDITION, JUNE 2008EFFECTIVE DATE: DECEMBER 1, 2008CONTAINS API MONOGRAM ANNEX AS PART OFUS NATIONAL ADOPTIONISO 10424-2:2007 (Identical), Petroleum and natural gas indus
2、triesRotary drilling equipmentPart 2: Threading and gauging of rotary shouldered thread connectionADDENDUM 1DECEMBER 2010EFFECTIVE DATE: JUNE 2011Addendum 1 to Specification for Threading and Gauging of Rotary Shouldered Thread Connections Summary of changes Clause 3: Delete reference to API Spec 7,
3、 include reference to API Spec 5DP. Table 1, Column 9, Change tolerance on LPCfrom 0/3 to 0/3,18 Table 1, footnote (c), Replace 5 mm with 0/ 5 mm Figure 7 (b), Replace as shown decrease groove depth from 6,4 (0.25) to 1,6 (0.062) Table 5, Column 2, Change tolerance on DCBfrom +0,38/0 to +0,40/0 Tabl
4、e 5, Column 6, Change tolerance on LBGfrom 0/3,1 to 0/3,18 Table 9, footnote (a), Replace A.5 with A.9 Figure 14, Key add Note: For drill bit pins only, tolerance is +0,25/0,79 mm (+0.010/0.031 in) Figure 20, Replace dimension 177,8 3,2 (7 0.12) with 171,4 3,20 (6.75 0.13) Clause 6.2, Replace clause
5、, including Table 3 (see below) Table A.1, Column 9, Change tolerance on LPCfrom 0/0.12 to 0/0.125 Table A.1, Column 12, Change tolerance on QCfrom +0.030/0.015 to +0.031/0.016 Table A.1, footnote (b), Replace 0.19 in with 0/0.2 in 2 SPECIFICATION FOR THREADING AND GAUGING OF ROTARY SHOULDERED THREA
6、D CONNECTIONS Table A.3, Replace the table (see below) Table A.5, Column 2, Change tolerance on DCBfrom +0.015/0 to +0.016/0 Table A.5, Column 6, Change tolerance on LBGfrom 0/0.13 to 0/0.125 Annex F, Replace completely (see below) Annex I, Replace clause I.4.4 through I.4.6 (see below) 6.2 Bevels f
7、or drill collars and tools that mate directly with drill collars 6.2.1 Purpose of bevel diameters Bevels on connections serve two purposes. The first is to protect the outer edge of the sealing face from deformation in the form of mashes and fins. The second is to increase the contact pressure on th
8、e sealing face so as to minimize leaking and separation due to downhole bending. Bevel diameters on the same ODs should be of equal size, within manufacturing tolerances, on mating pins and boxes to minimize the formation of grooves on the sealing faces. When mismatches of ODs greater than 6,35 mm (
9、0.250 in), mismatches of bevel diameters will also occur. Historically bevel diameters have been calculated every 6,35 mm (0.250 in) based on 75 percent of the shoulder width. This basic calculation is simple and depends only on the outside diameter and counter bore of the connection. Effort has bee
10、n made to preserve these historical bevel diameters because they are easy to calculate and have worked very well in most cases. 6.2.2 Methods to calculate bevel diameters However it has been found that use of this process alone will result in some OD-ID combination having a compressive stress on the
11、 sealing face above the SMYS of the material. FEA analysis has shown yield of the seal face will not occur at 100 percent of SMYS. Because the seal face has to handle the misapplication of make-up torque, unexpected downhole torque and bending of the drill string, the calculation of bevel diameters
12、for drill collars and tools that mate with them is based on a two-step computation described in detail in Annex I. The combination of the two methods ensures the stress levels on the sealing faces does not exceed 100 percent of the SMYS for connections with OD and ID combinations commonly used. The
13、two steps are identified as: 1. The 75 percent shoulder width method; 2. The mismatched outside diameter method. The two methods are fully described in Annex I. 6.2.3 Other considerations Table 3 (Table A.3) have bevel diameters that cover a range from a suggested minimum OD to a maximum OD. The tab
14、les also contain a Reference ID. The purpose of the Reference ID is to be able to calculate shoulder loads that will cause the seal face stress on mismatched ODs to exceed the SMYS of the product material. API SPECIFICATION 7-2, ADDENDUM 1 3 When the ID of the drill collar or tools that mate directl
15、y with them is equal to or greater than the reference ID, the minimum OD listed for each connection in Table 3 (Table A.3) can be mated with the largest OD listed (or any OD in between) for that same connection in the table and the stress on the seal face will not exceed 100 percent of SMYS. The sma
16、llest bevel diameter shown in Table 3 (Table A.3) is the smallest bevel diameter recommended for each connection if the seal face stress generated by mismatches of ODs is not to exceed the SMYS. Bevel diameters for low-torque features have been arbitrarily set and shall not increase or decrease with
17、 diameter changes. Bevel diameters in Table 3 (Table A.3) shall not apply to products that have specific requirements in API Spec 7-1, API Spec 5DP, ISO 10424-1 and ISO 11961, such as tool joints for drill pipe and HWDP, bits, or boxes that mate with bits. Unless otherwise specified, bevel diameter
18、tolerances shall be 0,4 mm ( 0.016 in). Caution: The bevel diameters set forth in this standard do not account for all potential mismatches that can occur when components with significantly different box OD, pin ID or bevel diameters are made up. Connections with such mismatched dimensions can resul
19、t in seal stresses in excess of the specified minimum yield strength of the material which increases the risk of galling, finning and mechanical damage to the seal face. 4 SPECIFICATION FOR THREADING AND GAUGING OF ROTARY SHOULDERED THREAD CONNECTIONS Table 3 Reference bevel diameters for Preferred
20、connections when used on drill collars, in SI units Dimensions in millimetres Connection style and size Ref ID d Bevel diameters afor various ODs b, cNC 23 28,58 OD 79,38 BD 76,20NC 26 38,10 OD 85,72 88,90 92,08 95,25 98,42 BD 84,53 e84,53 e87,71 87,71 92,47NC 31 38,10 OD 104,78 107,95 111,12 BD 101
21、,60 e101,60 e105,17NC 35 50,80 OD 114,30 117,48 120,65 BD 110,33 110,33 114,70NC 38 57,15 OD 120,65 123,82 127,00 130,18 133,35 BD 117,87 e117,87 e121,05 121,05 125,81NC 40 50,80 OD 133,35 136,52 139,70 142,88 146,05 BD 128,19 e128,19 e132,16 132,16 136,92 NC 44 57,15 OD 139,70 142,88 146,05 149,22
22、152,40 155,58 158,75 BD 138,11 e 138,11 e 139,70 139,70 144,46 144,46 149,22 NC 46 57,15 OD 152,40 155,58 158,75 161,92 165,10 168,28 171,45 174,62 BD 145,25 e145,25 e150,02 150,02 154,78 154,78 159,54 159,54 NC 50 57,15 OD 161,92 165,10 168,28 171,45 174,62 177,80 180,98 184,15 BD 161,14 e161,14 e1
23、61,14 e161,14 e164,70 164,70 169,46 169,46 NC 56 63,50 OD 184,15 187,32 190,50 193,68 196,85 200,02 203,20 BD 179,78 e179,78 e180,58 180,58 185,34 185,34 190,10 NC 61 71,44 OD 203,20 209,55 212,72 215,90 219,08 222,25 225,42 228,60 BD 197,25 e198,44 198,44 203,20 203,20 207,96 207,96 212,72 NC 70 71
24、,44 OD 234,95 238,12 241,30 244,48 247,65 250,82 254,00 BD 226,61 e226,61 e227,80 227,80 232,57 232,57 237,33 1 REG 12,70 OD 39,69 42,86 BD 38,50 38,501 1/2 REG 12,70 OD 52,39 55,56 BD 50,80 50,80API SPECIFICATION 7-2, ADDENDUM 1 5 Table 3 Reference bevel diameters for Preferred connections when use
25、d on drill collars, in SI units (continued) Dimensions in millimetres Connection style and size Ref ID dBevel diameters afor various ODs b, c 2 3/8 REG 36,51 OD 79,38 82,55 85,72 88,90 BD 76,60 76,60 81,36 81,36 2 7/8 REG 33,34 OD 98,42 BD 90,88 3 1/2 REG 38,10 OD 111,12 114,30 BD 104,78 e108.35 4 1
26、/2 REG 57,15 OD 139,70 142,88 146,05 149,22 152,40 BD 137,71 e137,71 e139,30 139,30 144,06 5 1/2 REG 63,50 OD 177,80 180,98 184,15 187,32 190,50 BD 167,48 167,48 173,83 173,83 178,59 6 5/8 REG 71,44 OD 190,50 193,68 196,85 200,02 203,20 206,38 209,55 BD 184,94 184,94 186,13 186,13 190,90 190,90 195,
27、66 7 5/8 REG FF 71,44 OD 225,42 228,60 231,78 234,95 238,12 241,30 BD 215,90 e215,90 e219,08 219,08 223,84 223,84 7 5/8 REG LT 63,50 OD 241,30 244,48 247,65 250,82 254,00 BD 234,95 234,95 234,95 234,95 234,95 8 5/8 REG FF 76,20 OD 254,00 257,18 260,35 263,52 266,70 269,88 273,05 276,22 BD 246,86e246
28、,86 e246,86e246,86e251,22 251,22 255,98 255,98 8 5/8 REG LT 76,20 OD 269,88 273,05 276,22 279,40 BD 266,70 266,70 266,70 266,70 5 1/2 FH e63,50 OD 184,15 187,32 190,50 193,68 196,85 200,02 203,20 BD 178,99 e178,99 e180,18 180,18 184,94 184,94 189,70 6 5/8 FH 71,44 OD 215,90 219,08 222,25 225,42 228,
29、60 231,78 234,95 BD 208,36 e208,36 e209,95 209,95 214,71 214,71 219,47 aTolerance on bevel diameters is 0.40 millimeters bSee Table A.15 in ISO 10424-1 (API Spec 7-1) for tolerances on ODs of drill collars cWhen drill collars and tools of the same OD listed in the table above are mated, the maximum
30、seal stress will be less than 100 percent of SMYS when torqued up to the recommended torque value. dWhen drill collars and tools of the smallest OD listed in the table above are mated with the largest OD listed above, the maximum seal stress level will not exceed 100 percent of SMYS if the ID is not
31、 less than the Reference ID shown in column 2. eThese bevel diameters are calculated using the torsional make up load generated by using the largest OD and the Reference ID and then determining the seal face area needed to support the above torsional load to ensure the maximum seal stress for these
32、bevel diameters is less than 100 percent of SMYS when the smallest OD is mated (mismatched) with the largest OD shown.6 SPECIFICATION FOR THREADING AND GAUGING OF ROTARY SHOULDERED THREAD CONNECTIONS Table A.3 Reference bevel diameters for Preferred connections when used on drill collars, in USC uni
33、ts Dimensions in inches Connection style and size Ref. ID dBevel diameters for various ODs a b, cNC 23 1.125 OD 3.125 BD 3.000 NC 26 1.500 OD 3.375 3.500 3.625 3.750 3.875 BD 3.328 e3.328 e3.453 3.453 3.641 NC 31 1.500 OD 4.125 4.250 4.375 BD 4.000 e4.000 e4.141 NC 35 2.000 OD 4.500 4.625 4.750 BD 4
34、.344 4.344 4.516 NC 38 2.250 OD 4.750 4.875 5.000 5.125 5.250 BD 4.641 e4.641 e4.766 4.766 4.953 NC 40 2.000 OD 5.250 5.375 5.500 5.625 5.750 BD 5.047 e5.047 e5.203 5.203 5.391 NC 44 2.250 OD 5.500 5.625 5.750 5.875 6.000 6.125 6.250 BD 5.438 e5.438 e5.500 5.500 5.688 5.688 5.875 NC 46 2.250 OD 6.00
35、0 6.125 6.250 6.375 6.500 6.625 6.750 6.875 BD 5.719 e5.719 e5.906 5.906 6.094 6.094 6.281 6.281 NC 50 2.250 OD 6.375 6.500 6.625 6.750 6.875 7.000 7.125 7.250 BD 6.344 e6.344 e6.344 e6.344 e6.484 6.484 6.672 6.672 NC 56 2.500 OD 7.250 7.375 7.500 7.625 7.750 7.875 8.000 BD 7.078 e7.078 e7.109 7.109
36、 7.297 7.297 7.484 NC 61 2.812 OD 8.000 8.250 8.375 8.500 8.625 8.750 8.875 9.000 BD 7.766 e7.812 7.812 8.000 8.000 8.188 8.188 8.375 NC 70 2.812 OD 9.250 9.375 9.500 9.625 9.750 9.875 10.000 BD 8.922 e8.922 e8.969 8.969 9.156 9.156 9.344 1 REG 0.500 OD 1.563 1.688 BD 1.516 1.516 1 1/2 REG 0.500 OD
37、2.063 2.188 BD 2.000 2.000 API SPECIFICATION 7-2, ADDENDUM 1 7 Table A.3 Reference bevel diameters for Preferred connections when used on drill collars, in USC units (continued) Dimensions in inches Connection style and size Ref ID dBevel diameters for various ODs a, b, c2 3/8 REG 1.438 OD 3.125 3.2
38、50 3.375 3.500 BD 3.016 3.016 3.203 3.203 2 7/8 REG 1.312 OD 3.875 BD 3.578 3 1/2 REG 1.500 OD 4.375 4.500 BD 4.125 e4.266 4 1/2 REG 2.250 OD 5.500 5.625 5.750 5.875 6.000 BD 5.422 e5.422 e5.484 5.484 5.672 5 1/2 REG 2.500 OD 6.750 6.875 7.000 7.125 7.250 7.375 7.500 BD 6.594 e6.594 e6.656 6.656 6.8
39、44 6.844 7.031 6 5/8 REG 2.812 OD 7.500 7.625 7.750 7.875 8.000 8.125 8.250 BD 7.281 7.281 7.328 7.328 7.516 7.516 7.703 7 5/8 REG FF 2.812 OD 8.875 9.000 9.125 9.250 9.375 9.500 BD 8.500 e8.500 e8.625 8.625 8.812 8.812 7 5/8 REG LT 2.500 OD 9.500 9.625 9.750 9.875 10.000 BD 9.250 9.250 9.250 9.250
40、9.250 8 5/8 REG FF 3.000 OD 10.000 10.125 10.250 10.375 10.500 10.625 10.750 10.875 BD 9.719 e9.719 e9.719e9.719e9.891 9.891 10.078 10.078 8 5/8 REG LT 3.000 OD 10.625 10.750 10.875 11.000 BD 10.500 10.500 10.500 10.500 5 1/2 FH 2.500 OD 7.250 7.375 7.500 7.625 7.750 7.875 8.000 BD 7.047 e7.047 e7.0
41、94 7.094 7.281 7.281 7.469 6 5/8 FH 2.812 OD 8.500 8.625 8.750 8.875 9.000 9.125 9.250 BD 8.203 e8.203 e8.266 8.266 8.453 8.453 8.641 aTolerance on bevel diameters is 0.016 inches. bSee Table A.15 in ISO 10424-1 (API Spec 7-1) for tolerances on ODs of drill collars. cWhen drill collars and tools of
42、the same OD listed in the table above are mated, the maximum seal stress will be less than 100 percent of SMYS when torqued up to the recommended torque value. dWhen drill collars and tools of the smallest OD listed in the table above are mated with the largest OD listed above, the maximum seal stre
43、ss level will not exceed 100 percent of SMYS if the ID is not less than the Reference ID shown in column 2. eThese bevel diameters are calculated using the torsional make up load generated by using the largest OD and the Reference ID and then determining the seal face area needed to support the abov
44、e torsional load to ensure the maximum seal stress for these bevel diameters is less than 100 percent of SMYS when the smallest OD is mated (mismatched) with the largest OD shown. Annex F (informative) Other rotary shouldered connections F.1 Interchangeable connections Connections defined in the mai
45、n body of this part of ISO 10424 are considered preferred. They include NC23 to NC70, 1 REG to 8-5/8 REG, 5-1/2 FH and 6-5/8 FH. Connections in the NC style (column 1 of Table F.1) are interchangeable with several obsolete connections. When the obsolete connections are requested, they shall be repla
46、ced with the equivalent NC connections. Other non-preferred connections are also interchangeable; these are defined only once in the sections that follow. Table F.1 Interchangeable connections NC IF FH XH SH DSL WO Numbered Connection Internal Flush Full Hole eXtra Hole Slim Hole Double StreamLine W
47、ide Open NC26 2-3/8 IF 2-7/8 SH NC31 2-7/8 IF 3-1/2 SH NC38 3-1/2 IF 4-1/2 SH NC40 4 FH 4-1/2 DSL NC46 4 IF 4-1/2 XH 4 WO NC50 4-1/2 IF 5 XH 5-1/2 DSL 4-1/2 WO 2-7/8 XH 3-1/2 DSL 3-1/2 XH 4 SH F.2 GOST connections The majority of connections specified by GOST are interchangeable with connections in
48、this part of ISO 10424. The equivalence is listed below. The tolerances are slightly different between these standards. Table F.2 Equivalences for GOST connections GOST ISO GOST ISO GOST ISO Z-30 NC10 Z-94 NC35 Z-147 5-1/2 FH Z-35 NC12 Z-101 3-1/2 FH Z-149 NC56 Z-38 NC13 Z-102 NC38 Z-152 6-5/8 REGZ-
49、44 NC16 Z-108 NC40 Z-163 NC61 Z-65 NC23 Z-117 4-1/2 REG Z-171 6-5/8 FH Z-66 2-3/8 REG Z-118 NC44 Z-177 7-5/8 REG Z-73 NC26 Z-121 4-1/2 FH Z-185 NC70Z-76 2-7/8 REG Z-122 NC46 Z-201 8-5/8 REG Z-86 NC31 Z-133 NC50 Z-203 NC77Z-88 3-1/2 REG Z-140 5-1/2 REG 2 SPECIFICATION FOR THREADING AND GAUGING OF ROTARY SHOULDERED THREAD CONNECTIONS F.3 Non-interchangeable connections Certain connectio
