RESEARCH SPECIALIST EVALUATES POTENTIAL OF 25 NOVEL ROCK DRILL TYPES

DRILLING RATES OF NOVEL DRILLS ARE PROPORTIONAL TO POWER TRANSMITTED TO THE ROCK DIVIDED BY THE SPECIFIC ENERGY REQUIRED TO REMOVE ROCK. TORARY DRILLS ARE EFFICIENT IN TERMS OF ENERGY REQUIRED TO REMOVE ROCK, BUT THEY ARE LIMITED BY LOW POWER OUTPUT. POWER TRANSMITTED TO THE ROCK BY NOVEL DRILLS IS LIMITED BY: (1) THE AMOUNT OF POWER THAT CAN BE TRANSMITTED DOWN THE DRILLPIPE, (2) POWER OUTPUT OF THE DRILL, OR (3) AMOUNT OF POWER THAT THE ROCK WILL ACCEPT FROM THE DRILL. THE FOLLOWING NOVEL DRILLS ARE LIMITED PRIMARILY BY THE AMOUNT OF POWER THAT CAN BE DELIVERED DOWN THE DRILLSTEM: (1) CHEMICAL, (2) EROSION, (3) EXPLOSION, (4) IMPLOSION, (5) PELLET, AND (6) TURBINE. ESTIMATES ARE PRESENTED OF MAXIMUM DRILLING RATES FOR 8-IN. DIAMETER NOVEL DRILLS IN MEDIUM STRENGTH ROCK. LABORATORY AND FIELD TESTS HAVE DEMONSTRATED THAT SOME NOVEL DRILLS HAVE POTENTIAL FOR DRILLING OIL WELLS FASTER AND CHEAPER THAN ROTARY DRILLS. RESEARCH IS NEEDED ON THESE NOVEL DRILLS TO DELIVER MORE POWER TO THE DRILL AND REDUCE THE ENERGY REQUIREMENT FOR REMOVING ROCK.

• Supplemental Notes:
  • Vol 169, No 81, PP 76-77, 1 TAB, 4 REF
• Authors:
  • Maurer, W C
• Publication Date: 1968-8

Media Info

• Serial:
  • Engineering and Mining Journal
  • Publisher: McGraw-Hill, Incorporated

Subject/Index Terms

• TRT Terms: Drilling; Energy; Erosion; Explosives; Field tests; Laboratory tests; Pellets; Power; Rates; Rock drilling; Rotary drilling; Turbines
• Old TRIS Terms: Implosions; Rock drills
• Subject Areas: Energy; Geotechnology; Highways;

Filing Info

• Accession Number: 00219345
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 4 1994 12:00AM