OHS Code

Published Date: July 01, 2009
Bookmark this page

Part 37 Oil and Gas Wells

Section 782 Well stimulation

(1) This section applies to well stimulation or a similar operation.

(2) An employer must ensure that if a working pressure of 2000 kilopascals or more is applied to the piping system,

(a) workers establish the area between a pump or sand concentrator and the well-head as a potential danger area,

(b) workers control equipment located between a pump or sand concentrator and the well-head outside the potential danger area, and

(c) subject to subsection (3), workers do not enter that potential danger area when the system is pressurized.

(3) Subject to section 188, an employer may permit a worker to enter the potential danger area to operate the bleed-off valve or squeeze manifold if the pump is disengaged before that worker enters the potential danger area.

(4) An employer must ensure that

(a) while workers are using liquid carbon dioxide or liquid nitrogen, the pumping unit is positioned so that the valve controls are on the side opposite to the pipe supplying the well,

(b) a check valve is installed as close as practical to the well-head except while cementing or selective acidizing is occurring,

(c) if flammable fluids are being pumped during fracturing and acidizing treatment, fire protection equipment capable of extinguishing a fire that may occur is provided on pumping units, including blenders and coiled tubing units,

(d) a worker does not use the mud line from the cement truck in place of the circulating line, and

(e) a bleed-off valve is installed between a check valve and the well-head.