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KIRTLAND AIR FORCE BASE ALBUQUERQUE, NEW MEXICO ...

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APPENDIX F<br />

Special precautions for safe rotary or core drilling involve chucking, joint break, hoisting and lowering of drill rods:<br />

Only the operator of the drill rig shall brake or set a manual chuck so that rotation of the<br />

chuck will not occur prior to removing the wrench from the chuck.<br />

Do not brake drill rods during lowering into the hole with drill rod chuck jaws.<br />

Do not hold or lower drill rods into the hole with pipe wrenches.<br />

If a string of drill rods are accidentally or inadvertently released into the hole, do not attempt<br />

to grab the falling rods with your hands or a wrench.<br />

In the event of a plugged bit or other circulation blockage, relieve or bleed down the high<br />

pressure in the piping and hose between the pump and the obstruction before breaking the<br />

first tool joint.<br />

When drill rods are hoisted from the hole, they shall be cleaned for safe handling with a<br />

rubber or other suitable rod wiper. Do not use your hands to clean drilling fluids from drill<br />

rods.<br />

If work must progress over a portable drilling fluid (mud) pit, do not attempt to stand on<br />

narrow sides or cross members. The mud pit shall be equipped with rough surfaced, fitted<br />

cover panels of adequate strength to hold drill rig personnel.<br />

Do not lean unsecured drill rods against the mast. Either provide some method of securing<br />

the upper ends of the drill rod sections for safe vertical storage or lay the rods down.<br />

4.5.9.11 Engines and Pumps<br />

The following engine and pump stop devices are as follows:<br />

For an internal-combustion engine: an ignition or grounding switch.<br />

For a diesel engine: a quick-closing valve or equivalent device which will shut off the air to<br />

the air-intake manifold of the engine and prevent entry of gas-laden air, or a means of<br />

releasing the engine compression which will not produce an open flame or spark.<br />

For an electric motor: a suitable switch in the motor circuit, or a switch or stop button in the<br />

control circuit, approved for the location in which it is installed.<br />

Mud pumps shall be equipped with a pressure relieving device set to release within the limits<br />

of the safe working pressure of the pump. Such devices include direct spring-loaded safety<br />

valves, shear-pin safety valves, and rupture disks.<br />

There shall be no valve between the pump and its pressure-relieving device. The point of<br />

discharge from a pressure-relieving device shall be located where employees are not<br />

endangered by the discharge of fluids.<br />

Each pump shall be equipped with bleeder valves.<br />

Kirtland AFB<br />

Base-Wide Health and Safety Plan F-38 April 2004

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