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Interchangeability Page 58-71 Section revised. 2.9 Interchangeability 2.9.1 Definitions Some connections can be considered compatible or interchangeable. For the purpose of this book they have the same meaning and the word interchangeable will be used from this point on. 2.9.2 General rules Designs which are interchangeable can be successfully made-up and will retain, at a minimum, the performance (including seal ability) of the side with the lowest grade, lowest weight. Internal flushness is not guaranteed as often a step may appear in the bore as a consequence of different internal diameters. If mixing there will be a step in the bore Box lighter weight Step on pin shoulder. Pin lighter weight Step on box shoulder. Errata 24 th August 2011 vi
The step may cause: ⇨ turbulence which may lead to erosion when the well flows, ⇨ drift issues, ⇨ damage of the lowest D1 by internal tools in the well. VAM connections are only interchangeable with VAM connections from the same family. They cannot be mixed with API connections, copycat connections, competitor's connections and connections from other VAM designs. This does not mean that they cannot be screwed together. In some cases they will screw together but will not work correctly and will fail in service. This could lead to harm to people and the environment. Connections with the suffix Nx where 'x' is a sequential letter (A,B,C….) are not interchangeable with the standard product line for the same family. (except some particular cases). N: Not interchangeable. Connections with the suffix Kx where 'x' is a sequential letter (A,B,C…) are interchangeable with the standard product line for the same family. K: Kompatible; interchangeable. Even connections which are interchangeable may not always be mixed as a large difference in weight or steel grade could induce derating on performances or problems of torque determination. 2.9.3 Specific rules for VAM connections 2.9.3.1 VAM TOP and derivates Generally: ⇨ VAM TOP Tubing is in sizes 2 3/8" to 4 1/2" ⇨ VAM TOP Casing is in sizes 5" to 14" Many connections from the VAM TOP family are interchangeable. See table below for details. VAM TOP Tubing interchangeability Errata There is limited interchangeability of VAM TOP Tubing across the weight range. The different designs types are shown in the table below. If different weights are mixed within each group there will be a step in the bore. vii 24 th August 2011
Page 1 and 2: BOOK Errata - Edition of 1 st May 2
Page 3 and 4: Errata Modifications in the VA
Page 5 and 6: Shadow graphs with final torque as
Page 7: Page 46, paragraph 3, should read:
Page 11 and 12: VAM TOP Casing interchangeability A
Page 13 and 14: 2.9.3.4 Other connections VAM SLIJ
Page 15 and 16: 2.9.4.4 Performance when mixed conn
Page 17 and 18: Theoretical examples: Errata Torque
Page 19 and 20: 2.9.4.7 Specific rules for VAM TOP
Page 21 and 22: 2.9.5 Guideline to select the grade
Page 23 and 24: VAM TOP Page 82-83, the yield stren
Page 25 and 26: Errata Size (OD) inch VAM TOP
Page 31 and 32: Errata VAM TOP TECHNICAL DATA
Page 33 and 34: SIZE (OD) in. mm VAM TOP TORQUE VAL
Page 41 and 42: Size (OD) inch mm Errata VAM TOP HT
Page 43 and 44: Page 130-153, Torques values VAM TO
Page 45 and 46: Size (OD) Errata inch mm VAM TOP HC
Page 47 and 48: VAM TOP HC TORQUE VALUES SIZE NOMIN
Page 49 and 50: VAM FJL Page 206, technical data fr
Page 51 and 52: Errata VAM HP Page 279, technical d
Page 53: Errata li 24 th August 2011

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