GB297285A - Improvements in well-boring apparatus - Google Patents

Improvements in well-boring apparatus

Info

Publication number
GB297285A
GB297285A GB6656/28A GB665628A GB297285A GB 297285 A GB297285 A GB 297285A GB 6656/28 A GB6656/28 A GB 6656/28A GB 665628 A GB665628 A GB 665628A GB 297285 A GB297285 A GB 297285A
Authority
GB
United Kingdom
Prior art keywords
well
threaded
bore
projection
conical
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
GB6656/28A
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.)
COLON DEV CO
Original Assignee
COLON DEV CO
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 COLON DEV CO filed Critical COLON DEV CO
Priority to GB6656/28A priority Critical patent/GB297285A/en
Publication of GB297285A publication Critical patent/GB297285A/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
    • 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
    • E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
    • E21B10/325—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools the cutter being shifted by a spring mechanism

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)

Abstract

297,285. Redfern, C. K., (Brunt, P.). March 2, 1928. Borehole apparatus.-In a well-boring tool comprising a two-part body containing a spring- pressed mandrel carrying expanding cutters, the upper end of the lower part b of the body is reduced to form a screw-threaded, preferably tapering, projection i without encroaching on the passages h for flushing fluid, and the lower end of the upper part a has a corresponding threaded socket j to engage the projection i and opening into the bore of the part a. The bore of the part b is closed by a threaded plug k with a conical upper end, the adjacent part of the socket j also being conical. Rounded shoulders m are provided on the cutters. Specification 200,202 is referred to.
GB6656/28A 1928-03-02 1928-03-02 Improvements in well-boring apparatus Expired GB297285A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB6656/28A GB297285A (en) 1928-03-02 1928-03-02 Improvements in well-boring apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6656/28A GB297285A (en) 1928-03-02 1928-03-02 Improvements in well-boring apparatus

Publications (1)

Publication Number Publication Date
GB297285A true GB297285A (en) 1928-09-20

Family

ID=9818400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6656/28A Expired GB297285A (en) 1928-03-02 1928-03-02 Improvements in well-boring apparatus

Country Status (1)

Country Link
GB (1) GB297285A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0004674A2 (en) * 1978-04-06 1979-10-17 Ferdinand Panzer Gesellschaft m.b.h. Drill bit for making bore holes in earth and rock

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0004674A2 (en) * 1978-04-06 1979-10-17 Ferdinand Panzer Gesellschaft m.b.h. Drill bit for making bore holes in earth and rock
EP0004674A3 (en) * 1978-04-06 1979-10-31 Ferdinand Panzer Gesellschaft m.b.h. Drill bit for making bore holes in earth and rock

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