ZA87174B - Drill bit - Google Patents

Drill bit

Info

Publication number
ZA87174B
ZA87174B ZA87174A ZA87174A ZA87174B ZA 87174 B ZA87174 B ZA 87174B ZA 87174 A ZA87174 A ZA 87174A ZA 87174 A ZA87174 A ZA 87174A ZA 87174 B ZA87174 B ZA 87174B
Authority
ZA
South Africa
Prior art keywords
drill bit
drill
bit
Prior art date
Application number
ZA87174A
Inventor
Walter F Johnsey
Roy W Wood
Donald D Drummond
Original Assignee
Alabama State
Donald D Drummond
Walter F Johnsey
Drummond Herman L
Drummond Susan Diane
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alabama State, Donald D Drummond, Walter F Johnsey, Drummond Herman L, Drummond Susan Diane filed Critical Alabama State
Publication of ZA87174B publication Critical patent/ZA87174B/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/08—Roller bits
    • E21B10/22—Roller bits characterised by bearing, lubrication or sealing details
    • E21B10/24—Roller bits characterised by bearing, lubrication or sealing details characterised by lubricating details

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
ZA87174A 1986-01-13 1987-01-12 Drill bit ZA87174B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81832686A 1986-01-13 1986-01-13

Publications (1)

Publication Number Publication Date
ZA87174B true ZA87174B (en) 1987-08-26

Family

ID=25225263

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA87174A ZA87174B (en) 1986-01-13 1987-01-12 Drill bit

Country Status (6)

Country Link
EP (1) EP0230129A1 (en)
AU (1) AU6743787A (en)
BR (1) BR8700047A (en)
CA (1) CA1264318A (en)
MX (1) MX160907A (en)
ZA (1) ZA87174B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2055399A1 (en) * 1991-11-13 1993-05-14 Kenneth M. White Indicating means for a rock bit lubricating system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125175A (en) * 1964-03-17 figure
US2814464A (en) * 1953-01-02 1957-11-26 Engineering Lab Inc Air course drill bits
US3029881A (en) * 1959-06-09 1962-04-17 H C Smith Oil Tool Co Bit lubricator
US3924695A (en) * 1974-10-02 1975-12-09 John R Kennedy Rotary drilling method and apparatus
US4080091A (en) * 1976-11-03 1978-03-21 Reed Tool Company Drill bit
US4375242A (en) * 1980-08-11 1983-03-01 Hughes Tool Company Sealed and lubricated rock bit with air protected seal ring
US4386668A (en) * 1980-09-19 1983-06-07 Hughes Tool Company Sealed lubricated and air cooled rock bit bearing
EP0106701A3 (en) * 1982-10-19 1986-02-05 Drumco Method and apparatus for lubricating a drill bit
US4541494A (en) * 1982-10-19 1985-09-17 Drumco Drill bit assembly

Also Published As

Publication number Publication date
AU6743787A (en) 1987-07-16
EP0230129A1 (en) 1987-07-29
CA1264318A (en) 1990-01-09
BR8700047A (en) 1987-12-01
MX160907A (en) 1990-06-06

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