CORE DRILLER

Domain	Definition
Occupations	Operates gasoline, diesel, electric, or steam draw works to drill oil or gas wells: Observes pressure gauge and moves throttles and levers to control speed of rotary table which rotates string of tools in borehole, and to regulate pressure of tools at bottom of borehole. Connects sections of drill pipe, using handtools and powered wrenches and tongs. Selects and changes drill bits according to nature of strata, using handtools. Pushes levers and brake pedals to control draw works which lowers and raises drill pipe and casing into and out of well. Examines operation of slush pumps to ensure circulation and consistency of mud (drilling fluid) in well. Examines drillings or core samples from bottom of well to determine nature of strata. Fishes for and recovers lost or broken bits, casing and drill pipes from well, using special tools attached to end of drill pipe or cable. Keeps record of footage drilled, location and nature of strata penetrated, and materials used. Caps well or turns valves to regulate outflow of oil from well. Repairs or replaces defective parts of machinery, using handtools. May lower and explode charge in borehole to start flow of oil from well. May specialize in drilling underwater wells from barge-mounted derricks or drilling platforms and be designated Rotary Driller, Marine Operations (petrol. & gas). (references)
	Operates portable rotary drilling rig to drill shallow boreholes to obtain samples of earth formations, for placement of explosives in seismic prospecting, or for other tests to discover petroleum: Positions truck-mounted derrick at drilling area specified on field map. Starts rig and moves throttles and clutches to raise and lower drilling pipes. Counts sections of drill rod to determine depth of borehole. Selects coring bit and barrel. Withdraws core barrel from hole and extracts core from barrel. Records depths at which samples were taken. Repairs equipment, using handtools. (references)
Source: compiled by the editor from various references; see credits.

Anagrams: CORE DRILLER

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "c-d-e-e-i-l-l-o-r-r-r"
	-3 letters: collider, cordelle, lordlier, recoiled, recoiler, recorder, rerecord, rerolled, reroller.
	-4 letters: collide, collied, collier, decrier, driller, droller, orderer, redrill, reoiled, reorder.
	-5 letters: ceiled, ceiler, celled, clerid, coiled, coiler, colder, collie, corder, corrie, creole, decile, deicer, docile, lieder, ocelli, oreide, orrice, recode, recoil, record, relied, relier, reroll, rilled, roiled, rolled, roller.
Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.