BS EN ISO 10424-1:2004

This standard BS EN ISO 10424-1:2004 Petroleum and natural gas industries. Rotary drilling equipment is classified in these ICS categories:

• 75.180.10 Exploratory, drilling and extraction equipment

This part of ISO 10424 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 Figure 1.

Figure 1 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 ISO 13535.

^b Requirements on drill pipe with weld-on tool joints can be found in ISO 11961.

NOTE 1 For the purposes of the provision in footnote a, API Specs 8A and 8C are equivalent to ISO 13535.

NOTE 2 For the purposes of the provision in footnote b, API Specs 5D and 7 are equivalent to ISO 11961.

NOTE 3 All connections between lower kelly upset and the bit are RH.

NOTE 4 All connections between upper kelly upset and swivel are LH.