This standard was last reviewed and confirmed in 2013. Therefore this version remains current.
Establishes the nomenclature and lays down the leading dimensions to ensure interchangeability within the limits of system A of the following equipment: drill rods and couplings; casings, casing couplings, casing bits, casing shoes, drive shoes and casing ream shells; core barrels, core bits, core lifters and reaming shells. Specifies the characteristics of a range of equipment for drilling holes having diameters from 1.18 in to 7.88 in and yielding cores having diameters from 0.73 in to 6.5 in.
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|std 1 187|
|std 2 187||Paper|
A standard is reviewed every 5 years
Stage: 90.60 (Under review)
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