GB755260A - Hollow drill for the impact drilling of rocks and other minerals - Google Patents

Hollow drill for the impact drilling of rocks and other minerals

Info

Publication number
GB755260A
GB755260A GB7943/54A GB794354A GB755260A GB 755260 A GB755260 A GB 755260A GB 7943/54 A GB7943/54 A GB 7943/54A GB 794354 A GB794354 A GB 794354A GB 755260 A GB755260 A GB 755260A
Authority
GB
United Kingdom
Prior art keywords
bit
hollow
drill
spigot
shank
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
GB7943/54A
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.)
Hemscheidt Hermann Maschinenfabrik GmbH and Co
Original Assignee
Hemscheidt Hermann Maschinenfabrik GmbH and 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 Hemscheidt Hermann Maschinenfabrik GmbH and Co filed Critical Hemscheidt Hermann Maschinenfabrik GmbH and Co
Publication of GB755260A publication Critical patent/GB755260A/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
    • 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
    • E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches

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

755,260. Percussive drills. HEMSCHEIDT., H., [trading as HEMSCHEIDT MASCHINENFABRIK, H.J. March 18, 1954 [March 21, 1953; Feb. 12, 1954], No. 7943/54. Class 124 A hollow percussive drill comprises a drill shank, a drill bit, a spigot for connection to a drilling implement, thesecomponents being provided with internal passageways for the removal of drilling waste, and a protective tube making a clearance fit in respect to the part of the drill between the bit and the spigot and having an external diameter slightly less than that of the bit. As shown, the drill comprises a hollow shank 1 having a tapered portion at each end, a hollow bit 3 being secured at one end and a hollow spigot 2 at the other. Intermediate the bit and the spigot a protective tube 5 is fitted in such a manner as to allow limited longitudinal movement. A hollow connecting element with ratchet teeth may be fitted between the bit and the shank (Fig. 2, not shown).
GB7943/54A 1953-03-21 1954-03-18 Hollow drill for the impact drilling of rocks and other minerals Expired GB755260A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE755260X 1953-03-21

Publications (1)

Publication Number Publication Date
GB755260A true GB755260A (en) 1956-08-22

Family

ID=6659568

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7943/54A Expired GB755260A (en) 1953-03-21 1954-03-18 Hollow drill for the impact drilling of rocks and other minerals

Country Status (1)

Country Link
GB (1) GB755260A (en)

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