Exploratory Drilling Practices and Costs at Western Uranium Deposits
Exploration of hidden mineral deposits becomes increasingly important as known ore reserves are depleted. The primary objective in any exploratory program is to obtain enough reliable information to evaluate accurately the potential of the mineral deposit. Constant improvement in equipment and technique has established drilling as one of the most valuable methods of exploration. This paper presents the results of studies of several drilling methods currently used in the search for uranium deposits in sedimentary formations from surface drill sites. Also presented is a description of drilling with wire-line equipment from an underground location in metamorphic rocks. The studies were conducted in the Colorado Plateau area and in northwestern New Mexico and Wyoming. Statements of a general nature pertain to conditions or situations existent in those areas.
What people are saying - Write a review
We haven't found any reviews in the usual places.
attached average bottom bucket churn drill circulating CM CM compared completed compressed air compressor consisted contract controlled conventional core barrel core drilling core recovery core-drilling cost Courtesy cuttings depth designed diamond bit diesel oil discharged district drill cuttings drill operator drill pipe drill rig drill rods drillers dropped dust dust collector estimates excessive exploration exploratory drilling feet FIGURE fluid flushing foot formations ground hoist hole holes were drilled increased indicated inner tube assembly insert interval less loose loss lower Lucky Mc machine material medium method mineralized Mining motor mudstone noncore drilling normal Note obtained overshot particles percent Practice presented pressure probing pump radiometric ranged recover reduced relatively removed rock bits rotary rotated samples sandstone satisfactory surface TABLE truck-mounted unit Uranium usually wall weight wire-line core wire-line equipment