BS EN ISO 10424-1:2004

Provides requirements for the following drill stem elements: upper and lower kelly valves; square and hexagonal kellys; drill stem subs; standard steel and non-magnetic drill collars; drilling and coring bits.

This part of ISO10424 specifies requirements for the following drill stem elements: upper and lower kelly valves; square and hexagonal kellys; drill stem subs; standard steel and non-magnetic drill collars; drilling and coring bits. This part of 10424 is not applicable to drill pipe and tool joints, rotary shouldered connection designs, thread gauging practice, or grand master, reference master and working gauges. A typical drill stem assembly to which this part of 10424 is applicable is shown in Figure1. Figure1 Typical drill stem assembly Upper section of assembly Lower section of assembly Key 1 bit 7 pin tool joint 13 kelly drive section 2 rotary pin connection 8 drill pipe 14 upper kelly upset 3 rotary box connection 9 box tool joint 15 upper kelly valve 4 bit sub 10 protector rubber 16 swivel sub 5 drill collar 11 lower kelly valve or kelly saver sub 17 swivel stem 6 crossover sub 12 lower kelly upset 18 swivel a Requirements on swivels can be found in ISO13535. b Requirements on drill pipe with weld-on tool joints can be found in ISO11961. NOTE1 For the purposes of the provision in footnote a, API Specs 8A and 8C are equivalent to ISO13535. NOTE2 For the purposes of the provision in footnote b, API Specs 5D and 7 are equivalent to ISO11961. NOTE3 All connections between lower kelly upset and the bit are RH. NOTE4 All connections between upper kelly upset and swivel are LH.