OHS Code

Published Date: July 01, 2009
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Part 37 Oil and Gas Wells

Section 776 Drilling fluid

(1) An employer must ensure that, when workers are pumping drilling fluid,

(a) a positive displacement pump and its attachments have valves, pipes and fittings rated equal to or greater than the pump’s maximum working pressure,

(b) a positive displacement pump is protected against freezing,

(c) a pressure relief device is installed on the discharge side of a positive displacement pump,

(d) a valve is not installed between a pressure relief device and a positive displacement pump,

(e) piping on the discharge side of a pressure relief device does not have a valve,

(f) a pressure relief device is set to discharge at a pressure that is not more than the maximum working pressure recommended by the manufacturer for the drilling fluid pump, connecting pipes and fittings,

(g) shear pins used in a pressure relief device are of the design and strength specified in the manufacturer’s specifications,

(h) the fluids or materials discharged through a pressure relief device are piped to a place where they will not endanger workers,

(i) piping connected to the pressure side and discharge side of a pressure relief device is not smaller than the normal pipe size openings of the device,

(j) piping on the discharge side of the pressure relief device is secured,

(k) piping from the discharge side of the pressure relief device is continuously sloped to drain liquids, and

(l) piping going vertically on a relief line is heated or installed in a heated environment.

(2) An employer must ensure that the manufacturer’s specifications and recommendations are followed under subsection (1) unless a professional engineer certifies otherwise.

(3) An employer must ensure that a mud gun used for jetting is secured to prevent movement.

(4) An employer must ensure that a worker does not use a “quick closing” type of valve on the discharge line of a positive displacement pump.

(5) A worker must not use a “quick closing” type of valve on the discharge line of a positive displacement pump.