Introduction to drilling technology

Details Introduction to drilling technology Introduction to drilling technology

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.302...95m&link_type=abstract

In ESA, Physics and Mechanics of Cometary Materials p 95-114 (SEE N90-19989 12-90)

Physics

Core Sampling, Drill Bits, Drilling, Ice, Permafrost, Boreholes, Comets, Penetration, Percussion, Return To Earth Space Flight, Technology Assessment, Thrust, Torque

Scientific paper

Terrestrial drilling technology is reviewed. The general requirements for a drilling system are given and conventional drilling techniques (rotary drag-bit, rotary roller-bit, percussive, rotary percussive) are described. Unconventional techniques for penetrating solids are outlined, including thermal drilling (spalling or melting), projectile penetration, high pressure liquid jets, explosive jets, erosion by projectile streams, and chemical penetration. Special attention is given to drilling in ice and frozen soils, performance data are given, including values for penetration rate and specific energy consumption. The principles, theory and equipment relating to each drilling technique are indicated by means of diagrams.

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