AU7821675A - Removable stem for raise bit - Google Patents

Removable stem for raise bit

Info

Publication number
AU7821675A
AU7821675A AU78216/75A AU7821675A AU7821675A AU 7821675 A AU7821675 A AU 7821675A AU 78216/75 A AU78216/75 A AU 78216/75A AU 7821675 A AU7821675 A AU 7821675A AU 7821675 A AU7821675 A AU 7821675A
Authority
AU
Australia
Prior art keywords
removable stem
raise bit
raise
bit
stem
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
AU78216/75A
Other versions
AU488108B2 (en
Inventor
Earl Mitchell Howard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dresser Industries Inc
Original Assignee
Dresser Industries Inc
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 Dresser Industries Inc filed Critical Dresser Industries Inc
Application granted granted Critical
Publication of AU488108B2 publication Critical patent/AU488108B2/en
Publication of AU7821675A publication Critical patent/AU7821675A/en
Expired legal-status Critical Current

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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring
    • 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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/265—Bi-center drill bits, i.e. an integral bit and eccentric reamer used to simultaneously drill and underream the hole
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
AU78216/75A 1974-03-07 1975-02-14 Removable stem for raise bit Expired AU488108B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US449179A US3920089A (en) 1974-03-07 1974-03-07 Removable stem for raise bit
USUS449179 1974-03-07

Publications (2)

Publication Number Publication Date
AU488108B2 AU488108B2 (en) 1976-08-19
AU7821675A true AU7821675A (en) 1976-08-19

Family

ID=

Also Published As

Publication number Publication date
CA1010846A (en) 1977-05-24
ZA75618B (en) 1976-01-28
US3920089A (en) 1975-11-18
ZM1475A1 (en) 1975-12-22

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