SE9802710D0 - Percussive down-the-hole rock drilling hammer - Google Patents

Percussive down-the-hole rock drilling hammer

Info

Publication number
SE9802710D0
SE9802710D0 SE9802710A SE9802710A SE9802710D0 SE 9802710 D0 SE9802710 D0 SE 9802710D0 SE 9802710 A SE9802710 A SE 9802710A SE 9802710 A SE9802710 A SE 9802710A SE 9802710 D0 SE9802710 D0 SE 9802710D0
Authority
SE
Sweden
Prior art keywords
piston
mounting structure
bit
passageways
downwardly
Prior art date
Application number
SE9802710A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9802710L (en
SE517811C2 (en
Inventor
Rainer Beccu
Kenneth Ahlhorn
Matthew Shofner
Original Assignee
Sandvik Ab
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 Sandvik Ab filed Critical Sandvik Ab
Priority to SE9802710A priority Critical patent/SE517811C2/en
Publication of SE9802710D0 publication Critical patent/SE9802710D0/en
Publication of SE9802710L publication Critical patent/SE9802710L/en
Publication of SE517811C2 publication Critical patent/SE517811C2/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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/04—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously of the hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

A piston (16) is mounted between a mounting structure (12,36) and a top sub (14) for axial reciprocation in a casing (11). A piston lower portion is set to travel downwardly in the central passageway (39) of the bit-mounting structure and to strike the anvil (30) of a drill bit (13), such that downwardly facing surface (22) of a piston top portion is spaced above the drill bit and the mounting structure. The down-the-hole percussive hammer (10) includes the bit-mounting structure mounted in the lower portion of the cylindrical casing, forming the upwardly open central passageway. The drill bit is mounted in the bit-mounting structure such that its anvil is projected upward into the central passageway. Two passageways (24,25) are extended from an axial through-hole (31) to the outer peripheral side surface of the piston and respectively intersected with lower and upper ends of the passageways (17,18) which are downwardly extended from the upwardly facing surface (19) and the downwardly facing surface of the piston. The passageways (24,25) intermittently communicate with the lower aperture (21) of a feed tube (15) in reciprocation of the piston for exposing a casing inner surface to lubricating air. An Independent claim is also included for a piston.
SE9802710A 1998-08-12 1998-08-12 Down-the-hole percussive hammer for use in rock drilling SE517811C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9802710A SE517811C2 (en) 1998-08-12 1998-08-12 Down-the-hole percussive hammer for use in rock drilling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9802710A SE517811C2 (en) 1998-08-12 1998-08-12 Down-the-hole percussive hammer for use in rock drilling

Publications (3)

Publication Number Publication Date
SE9802710D0 true SE9802710D0 (en) 1998-08-12
SE9802710L SE9802710L (en) 2000-02-13
SE517811C2 SE517811C2 (en) 2002-07-16

Family

ID=20412232

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9802710A SE517811C2 (en) 1998-08-12 1998-08-12 Down-the-hole percussive hammer for use in rock drilling

Country Status (1)

Country Link
SE (1) SE517811C2 (en)

Also Published As

Publication number Publication date
SE9802710L (en) 2000-02-13
SE517811C2 (en) 2002-07-16

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