OHS Code

Published Date: July 01, 2009
Bookmark this page

Part 37 Oil and Gas Wells

Section 779 Drill stem testing

(1) This section applies to drill stem testing operations.

(2) An employer must ensure that after fluids are encountered while tripping out, workers use the mud can and test plug on every joint of pipe disconnected, unless the drill stem contents have been pumped out and replaced with drilling fluid.

(3) An employer must ensure that

(a) workers test for the presence of hydrogen sulphide and hydrocarbons if oil, water or gas is encountered during the drill stem testing, and

(b) if hydrogen sulphide is present, the sour fluids in the drill stem are displaced with drilling fluid and circulated to a flare pit or a holding tank that is at least 50 metres from the well.

(4) An employer must ensure that

(a) motors and engines not required in the testing operation are shut off, and

(b) there are no motor vehicles within 25 metres of the well bore.

(5) An employer must ensure that, if swivel joints are used in the piping system, workers secure the source and discharge ends of the piping system in a manner that stops pipes that are separated from the source or discharge connection from whipping or flailing.

(6) An employer must ensure that, if test fluid recovery is encountered during darkness,

(a) liquids are reverse circulated, or

(b) if reverse circulation is not practicable because the pump out sub has failed, additional drill pipe is not pulled and disconnected until daylight.