SE9802710D0 - Percussive down-the-hole rock drilling hammer - Google Patents
Percussive down-the-hole rock drilling hammerInfo
- 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
Links
- 238000005553 drilling Methods 0.000 title 1
- 239000011435 rock Substances 0.000 title 1
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
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.
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) |
-
1998
- 1998-08-12 SE SE9802710A patent/SE517811C2/en unknown
Also Published As
Publication number | Publication date |
---|---|
SE9802710L (en) | 2000-02-13 |
SE517811C2 (en) | 2002-07-16 |
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