EP0204243A3 - Rock drills - Google Patents

Rock drills Download PDF

Info

Publication number
EP0204243A3
EP0204243A3 EP86107126A EP86107126A EP0204243A3 EP 0204243 A3 EP0204243 A3 EP 0204243A3 EP 86107126 A EP86107126 A EP 86107126A EP 86107126 A EP86107126 A EP 86107126A EP 0204243 A3 EP0204243 A3 EP 0204243A3
Authority
EP
European Patent Office
Prior art keywords
hole
debris
chippings
drill
drills
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Withdrawn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
EP86107126A
Other languages
German (de)
French (fr)
Other versions
EP0204243A2 (en
Inventor
John Arthur Hurt
John Callam Allan Templeton Brown
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.)
WEAVER AND HURT Ltd
Original Assignee
WEAVER AND HURT Ltd
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 WEAVER AND HURT Ltd filed Critical WEAVER AND HURT Ltd
Publication of EP0204243A2 publication Critical patent/EP0204243A2/en
Publication of EP0204243A3 publication Critical patent/EP0204243A3/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Withdrawn legal-status Critical Current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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
    • 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

Abstract

The invention relates to rock drills generally known as down the hole drills. During the use of down the hole drills it is inevitable that chippings and other debris collect in the bot­ tom of the hole and unless such chipping and debris are removed the drilling operation will be impeded. In addition it is a frequent requirement that chippings and debris are brought to the surface for analysis. The object of the present invention is to provide a rock drill facilitating the efficient removal of chippings and debris from the bottom of a hole which objective is met by a construction in which pressure air for the purposes of driving the piston within the rock drill is exhausted through an annular passageway between the end of the wear tube and the drill bit and whereby exhaust air passes entirely around the periphery of the drill bit and to the bottom of the hole from where it enters a centre bore through the drill bit and is exhausted through the centre tube of the drill carrying with it all chippings and debris gathered in the bottom of the hole.
EP86107126A 1985-06-07 1986-05-26 Rock drills Withdrawn EP0204243A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB858514505A GB8514505D0 (en) 1985-06-07 1985-06-07 Rock drills
GB8514505 1985-06-07

Publications (2)

Publication Number Publication Date
EP0204243A2 EP0204243A2 (en) 1986-12-10
EP0204243A3 true EP0204243A3 (en) 1988-07-27

Family

ID=10580386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86107126A Withdrawn EP0204243A3 (en) 1985-06-07 1986-05-26 Rock drills

Country Status (3)

Country Link
EP (1) EP0204243A3 (en)
AU (1) AU5805286A (en)
GB (2) GB8514505D0 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215757B (en) * 1986-10-24 1990-05-30 William Lister A pneumatic percussion hammer
US4921056A (en) * 1987-04-23 1990-05-01 Ennis Melvyn S J Hammer drills for making boreholes
AU623434B2 (en) * 1988-09-22 1992-05-14 William Lister Improvements in pneumatic percussion hammers
WO1990003488A1 (en) * 1988-09-22 1990-04-05 William Lister Improvements in pneumatic percussion hammers
AU631220B2 (en) * 1989-06-19 1992-11-19 John Kitching Reverse circulation drilling apparatus
WO1991016521A1 (en) * 1990-04-19 1991-10-31 Werner Giehl Percussive drilling arrangement
US5685380A (en) * 1995-01-06 1997-11-11 Minroc Technical Promotions Limited Reverse circulation down-the-hole drill
IE80718B1 (en) * 1995-01-06 1998-12-30 Minroc Techn Promotions Ltd A reverse circulation down-the-hole drill
WO2023198568A1 (en) * 2022-04-13 2023-10-19 Sandvik Mining And Construction Oy Protective sleeve for percussive drilling assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934662A (en) * 1973-08-29 1976-01-27 Bakerdrill, Inc. Core bit
US3991834A (en) * 1975-07-07 1976-11-16 Curington Alfred R Sampling airhammer apparatus
US4321974A (en) * 1978-12-16 1982-03-30 Hydroc Gesteinsbohrtechnik Gmbh Annular drilling hammer
US4509606A (en) * 1980-10-29 1985-04-09 Walker-Neer Manufacturing Co., Inc. Axial return hammer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1558974A1 (en) * 1967-09-26 1970-04-02 Grossbohrloch Und Spreng Unter Ring downhole hammer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934662A (en) * 1973-08-29 1976-01-27 Bakerdrill, Inc. Core bit
US3991834A (en) * 1975-07-07 1976-11-16 Curington Alfred R Sampling airhammer apparatus
US4321974A (en) * 1978-12-16 1982-03-30 Hydroc Gesteinsbohrtechnik Gmbh Annular drilling hammer
US4509606A (en) * 1980-10-29 1985-04-09 Walker-Neer Manufacturing Co., Inc. Axial return hammer

Also Published As

Publication number Publication date
AU5805286A (en) 1986-12-11
EP0204243A2 (en) 1986-12-10
GB8514505D0 (en) 1985-07-10
GB8612767D0 (en) 1986-07-02
GB2175941A (en) 1986-12-10

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Effective date: 19890128

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Inventor name: HURT, JOHN ARTHUR

Inventor name: TEMPLETON BROWN, JOHN CALLAM ALLAN