EP0083507A3 - Fluid operated hammer having drill bit clearance means - Google Patents

Fluid operated hammer having drill bit clearance means Download PDF

Info

Publication number
EP0083507A3
EP0083507A3 EP82307000A EP82307000A EP0083507A3 EP 0083507 A3 EP0083507 A3 EP 0083507A3 EP 82307000 A EP82307000 A EP 82307000A EP 82307000 A EP82307000 A EP 82307000A EP 0083507 A3 EP0083507 A3 EP 0083507A3
Authority
EP
European Patent Office
Prior art keywords
piston
drill bit
feed tube
bore
casing
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.)
Withdrawn
Application number
EP82307000A
Other languages
German (de)
French (fr)
Other versions
EP0083507A2 (en
Inventor
Ian Graeme Rear
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0083507A2 publication Critical patent/EP0083507A2/en
Publication of EP0083507A3 publication Critical patent/EP0083507A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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

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

A fluid operated hammer comprising a cylindrical casing (11) having a bore for slidably receiving a piston (26), a top sub (12) mounted at one end, a drill bit (13) mounted to the other end by means of a chuck (14), a feed tube (20) concentrically mounted within the upper end of the bore of the casing and extending downwardly into the casing, said feed tube being connectible to a fluid source through said top sub. The piston is slidably mounted within the bore of said casing over said feed tube (20). The feed tube (20) is provided with at least one aperture (24) in the walls of said feed tube, and at least one port (27, 29) provided at each end of the piston. Each port opens at spaced locations into the bore of the piston to periodically communicate with said aperture (24) as a result of sliding movement of the piston over the feed tube to alternately drive the piston towards and away from the drill bit to impact thereon and to drive the piston away from the drill bit. A further aperture (40) is provided in said feed tube (20) to communicate with the space between said drill bit (13) and said piston (26) when said hammer is in the "blow-­ down" position. The drill bit (13) is mounted in the chuck (14) in such manner that when in the "blow-down" position there is communication between said space and the exterior of the hammer through the zone between the drill bit and the chuck.
EP82307000A 1982-01-04 1982-12-30 Fluid operated hammer having drill bit clearance means Withdrawn EP0083507A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPF215082 1982-01-04
AU2150/82 1982-01-04

Publications (2)

Publication Number Publication Date
EP0083507A2 EP0083507A2 (en) 1983-07-13
EP0083507A3 true EP0083507A3 (en) 1983-09-07

Family

ID=3769318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82307000A Withdrawn EP0083507A3 (en) 1982-01-04 1982-12-30 Fluid operated hammer having drill bit clearance means

Country Status (3)

Country Link
EP (1) EP0083507A3 (en)
AU (1) AU9176182A (en)
ZA (1) ZA8327B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4932483A (en) * 1988-02-16 1990-06-12 Ian G. Rear Down hole hammer
AUPO698197A0 (en) * 1997-05-26 1997-06-19 Sds Digger Tools Pty Ltd A percussive hammer drill

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015670A (en) * 1974-09-06 1977-04-05 Ian Graeme Rear Fluid operated hammer
US4084647A (en) * 1976-07-01 1978-04-18 William Lister Pneumatic percussion hammer
US4146097A (en) * 1972-04-24 1979-03-27 Bakerdrill, Inc. Bore hole air hammer
GB1552975A (en) * 1976-12-07 1979-09-19 Atlas Copco Ab Drills
GB2052608A (en) * 1979-06-11 1981-01-28 Dresser Ind Fluid operated rock drill hammer
GB2054705A (en) * 1979-08-06 1981-02-18 Dresser Ind Fluid operated rock drill hammer
EP0043291A1 (en) * 1980-07-01 1982-01-06 Greame Rear Ian Improved fluid operated hammer
EP0048142A1 (en) * 1980-09-11 1982-03-24 Ian Graeme Rear Fluid operated hammer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146097A (en) * 1972-04-24 1979-03-27 Bakerdrill, Inc. Bore hole air hammer
US4015670A (en) * 1974-09-06 1977-04-05 Ian Graeme Rear Fluid operated hammer
US4084647A (en) * 1976-07-01 1978-04-18 William Lister Pneumatic percussion hammer
GB1552975A (en) * 1976-12-07 1979-09-19 Atlas Copco Ab Drills
GB2052608A (en) * 1979-06-11 1981-01-28 Dresser Ind Fluid operated rock drill hammer
GB2054705A (en) * 1979-08-06 1981-02-18 Dresser Ind Fluid operated rock drill hammer
EP0043291A1 (en) * 1980-07-01 1982-01-06 Greame Rear Ian Improved fluid operated hammer
EP0048142A1 (en) * 1980-09-11 1982-03-24 Ian Graeme Rear Fluid operated hammer

Also Published As

Publication number Publication date
EP0083507A2 (en) 1983-07-13
AU9176182A (en) 1983-07-14
ZA8327B (en) 1983-10-26

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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PUAL Search report despatched

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AK Designated contracting states

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Effective date: 19840227

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19850409