Safety 1st Advancer Manual do Operador descarregar pdf (Página 50)

Environmental Remediation Drilling

Safety Guideline

Page 50 of 132

4.4 - Rotary Drilling

The term mud rotary means direct rotary drilling using mud slurry or water circulation to remove cuttings

and keep the borehole wall stabilized. Be aware of the following hazards which may be unique to this type

of drilling:

• Lifting heavy equipment (such as drill rods, flight augers)

• Rotating equipment and parts, flight augers, and

• Slippery or dangerous work areas caused by messy mud pits or troughs (workers could fall in), keep

work area clear.

• Water swivels and hoisting plugs should be lubricated and checked for frozen bearings before use.

• Do not hold on to the discharge hose, or allow it to coil around your feet, while the tools are rotating.

• When unscrewing a side-mount water swivel from the drill string, be sure the string is sitting on the

bottom of the borehole. Do not hold on to the back-up wrench while tools are rotating.

• Use the proper size wrench to makeup and breakout joints of casing. Put yourself in a stable position and

pull, do not push, on the wrench.

• Keep hands away from the bottom of the bit assembly when removing it from, or inserting it into, the

casing or boring. Set the assembly on the ground and remove it from the overshot - do not allow it to

hang from the wire line.

• Use full grip circle wrenches to assemble and disassemble core barrels.

• Keep hands away from the bottom of the core barrel or inner tube when removing it from, or inserting it

into, the casing, augers, or drill rods.

Air rotary is direct rotary drilling using high pressure air circulation to remove cuttings and keep the bit

cool. Be aware of the following hazards which may be unique to this type of drilling:

• Rotating/lifting equipment,

• High pressure air lines,

• Air discharge of cuttings at high velocity (use a cover to control discharge of cuttings),

• Heavy drill rods being lifted,

• High noise levels, wear hearing protection,

• Space limitations (large drill rig and support vehicle), and

• Dust generation in dry formations (move upwind and use a cover or water spray for dust control).

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Safety 1st Advancer Manual do Operador Página 50