rotary drill

rotary drill

[′rōd·ə·rē ′dril]
(mechanical engineering)
Any of various drill machines that rotate a rigid, tubular string of rods to which is attached a rock cutting bit, such as an oil well drilling apparatus.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

rotary drill

A machine for opening holes in rock or earth by means of a cutting bit at the end of a metal shank; usually turned by a hydraulically or pneumatically driven motor.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The drill costs an estimated one tenth of a conventional rotary drill, and requires less fuel per well drilled.
A mud rotary drill rig has also been sourced and should be on site shortly.
In 1978 he became shareholder and director of Superior Rock Bit Company of Minnesota which supplies the open-pit mining industry with large-diameter rotary drill bits.
The Company has intersected the Silkstone seam with eight of the rotary drill holes completed in the Vista development drilling program.
The Company's second phase development drilling program includes 16 rotary drill holes and 10 core holes with completion expected later this quarter.
Over the past two years development efforts of Littlehampton, U.K.-based Dando have concentrated on two main areas: introduction of a more powerful range of shell and auger type cable percussion drilling rigs; and the design of low cost, but powerful top drive hydraulic rotary drill rigs.