Paragraph 8 Section 1A: EquipmentF1

a “blowout preventer” is a device typically used at ground level (or, if drilling underwater, at the seabed) during drilling to prevent the uncontrolled escape of oil and/or gas from the well;

a “Christmas tree or production tree” is a device typically used to control flow of fluids from the well when it is complete and oil and/or gas production has started;

“API and ISO specifications” refers to the American Petroleum Institute specifications 6A, 16A, 17D and 11IW and the International Standards Organisation specifications 10423 and 13533 for blowout preventers, wellhead and Christmas trees for use on oil and/or gas wells.