US3524511A - Core type hammer drill with annular piston - Google Patents

Core type hammer drill with annular piston Download PDF

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Publication number
US3524511A
US3524511A US770036A US3524511DA US3524511A US 3524511 A US3524511 A US 3524511A US 770036 A US770036 A US 770036A US 3524511D A US3524511D A US 3524511DA US 3524511 A US3524511 A US 3524511A
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US
United States
Prior art keywords
core
annular
bit
drill
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.)
Expired - Lifetime
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US770036A
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English (en)
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Gunter Klemm
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Individual
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Publication of US3524511A publication Critical patent/US3524511A/en
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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
    • 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
    • E21B10/00—Drill bits
    • E21B10/02—Core bits

Definitions

  • a core-type deep-drilling hammer drill especially for carrying out core drilling in rock, having an annular core bit, a core barrel and a core-catcher ring, wherein on the drill hole Ifloor a hollow piston is provided as striker element which is guided between an inner cylinder, serving at the same time as core barrel, and an outer cylinder resting on the inner side of the external housing and clamped in between annular core bit and an upper part, and which acts upon the rear end of the core bit.
  • the piston is driven by air, which also ushes cuttings from the core bit.
  • This invention relates to core-type deep-drilling hammer drills, especially for carrying out core drilling in rock, having an annular core bit, a core barrel and a core catcher ring.
  • a hollow piston is provided as striker element on the floor of the drill hole, which piston is guided between an inner cylinder, serving at the same time as core barrel, and an outer cylinder resting upon the inside of the external housing and clamped in between the annular core bit and an upper part, and acts upon the rear end of the core bit.
  • a clamping ring can be screwed into the external housing for the clamping-in of the outer cylinder and of a piston-guide bush, the clamping ring being provided with passage holes for flushing air.
  • the annular core bit can here be inserted into the clamping ring.
  • the core-catcher ring known per se can be inserted according to the invention with axial play into a ring groove of the annular core bit.
  • a ntter valve device is provided according to the invention for the control of the hollow piston.
  • a flutter feature of the invention consists in that for the connection of the rst extension rod a double-walled intermediate piece is provided having an annular threaded United States Patent O 3,524,511 Patented Aug. 18, 1970 insert piece with conical internal threading in which an insert piece with corresponding conical external threading seated in the lower end of the extension rod engages. These insert pieces have passage bores for compressed air and flushing air, distributed in the peripheral direction.
  • a distance ring likewise having passage bores distributed in the peripheral direction, is expediently welded into the lower end of the intermediate piece.
  • the hammer drill represented in section comprises essentially an external housing 1, an annular core bit 2. with hard metal cutting edges 3, an inner cylinder 4 serving at the same time as core barrel, for the guidance of a hollow piston 5, and an outer cylinder 6 which externally guides the hollow piston 5.
  • a guide bush 7 is also provided.
  • a clamping ring 8, which is provided with passage holes 9 for ilushing air, is screwed into the lower end of the external housing 1.
  • the clamping ring 8 holds the outer cylinder 6 and the guide bush 7 fast in their position.
  • the annular core bit 2 can be screwed into the clamping ring 8, as illustrated, or can equally be held therein by a known key connection.
  • a corecatcher ring 11 which is slit longitudinally at one point of the periphery and can be resiliently compressed in insertion, is seated in a ring groove 10 in the annular core bit 2.
  • the neck piece 12 of the annular core bit 2 is prolonged so far that a narrow interspace 13 remains between the core bit 2 and the clamping ring 8, into which interspace there open longitudinal grooves (not shown) when the latter moves back and forth.
  • outer cylinder 6 Several, for example two, through-passing longitudinal grooves (not shown in the sectional drawing) are situated in the outer face of the outer cylinder 6, which grooves constantly convey flushing air by way of the passage holes 9 of the clamping ring 8 to the outside of the annular core bit 2. Furthermore the outer cylinder 6 comprises grooves 15 which are downwardly closed and supplied with compressed air through an oblique bore 16 of a flutter-valve device 17, which air passes by way of an opening 18 in the outer cylinder 6 into the lower cylinder chamber 19, in order to charge the hollow piston 5 from beneath. Further grooves 20 of the outer cylinder 6 are downwardly open and in communication there with grooves 21 of the guide bush 7.
  • the pressure in the upper cylinder chamber 22 is released through openings 23 which constitute a connection with the grooves 20, so that the compressed air escaping from the upper cylinder chamber 22 passes as flushing air to the annular core bit 2.
  • the pressure acting upon the smaller cross section of the under side of the hollow piston 5 can move the hollow piston 5 back or upwards again, until the air-outlet openings 23 are closed again by the piston 5, so that now the pressure acting upon the larger upper side of the piston 5 moves the piston 5 downwards again, until it strikes upon the rear end of 3 the neck piece 12 of the annular core bit 2.
  • the upper cylinder chamber 22 is supplied with compressed air by the Hutter-valve device 17 through bores 24, while the compressed air is fed to the flutter-valve device 17 through bores 2S.
  • the bores 25 are connected to the spaces above and below the diaphragm of the valve 17. Compressed air flows through one of the bores 25 to the space below the diaphragm and forces the diaphragm upwards to open the connection between said bore 25 and the chamber 22 and simultaneously to close the connection between a further bore 25 and the bore 16.
  • the diaphragm When communication is established between the chamber 22 and the openings 23 the diaphragm is forced downwards by the air from said further bore 2S thereby closing the connection to the chamber 22 and opening the connection to the bore 16.
  • the communication between the chamber 22 and openings 23 is cut ofic the diaphragm is moved upwards again.
  • the hollow piston S in this way moves back and forth in rapid sequence and thus, by means of the annular core bit 2, effects comminution of the rock, which is conveyed away by the rotating core bit 2 and by the flushing air.
  • the hollow piston acting as striker element is situated practically on the floor of the drill hole, the impact loading of the annular core bit 2 is undiminished in its intensity even at very great drill hole depths.
  • the core drilling can be carried out to the desired depth without the need to take the core out every time after short drilling distances. Due to the percussion drilling, which renders the use of hard metal annular core bits possible, the Wear is reduced to a minimum.
  • the flushing air effects such intensive cooling of the annular core bit 2 that in cold, damp weather it is even possible for icing of the bores 9 of the clamping ring 8 to occur, as has appeared in practice. It is possible to avoid this however by appropriate frost-protection means.
  • the intermediate piece 26 comprises an annular threaded insert piece 28 having conical internal threading, in which a correspondingly conically externally threaded insert piece 29 seated in the lower or forward end of the extension rod 27 engages.
  • the insert pieces 28 and 29' possess passage bores 30 distributed in the peripheral direction for compressed air and flushing air, while an annular space 31 ensures a connection between the passage bores 30 even if these should not be in alignment with one another when the extension rod 27 is screwed in.
  • a distance ring 32 which likewise is provided with passage bores 33 distributed in the peripheral direction, is welded into the lower end of the intermediate piece 26.
  • the present core-type deep-drilling hammer drill can be used not only for core drilling, but also for normal drilling.
  • a core drill comprising an elongated tubular casing having an upper and a lower section and having first and second passage means; a drill bit mounted on said lower section of said casing for rotation with said casing and being dimensioned and axially fixed to said casing so that said casing will follow said drill bit down a hole being drilled; tubular means mounted within said casing to provide a continuously unobstructed passage between said drill bit and the top of said casing and being dimensioned to be spaced from said casing to define an annular space; piston means mounted for axial movement within said annular space; passage means for delivering pressurized fluid to said piston means and for letting off relieved fluid to said drill bit, respectively; and annular valve means disposed between said casing and said tubular means for controlling the flow of pressurized uid to said annular space and said passage means, respectively, to cause said piston means to hit said drill bit and to cause fluid to flush said drill bit.
  • a core drill comprising: an elongated tubular casing having a thinner walled upper section and a thicker walled lower end section; said thinner walled section being provided with first and second channel means; said first channel means leading to first openings in the lower part of said thinner walled section and said second channel means, beginning with second openings in the medium part of said thinner Walled section and being connected to said third'channel means; a drill bit having a thinner walled, a tapered and a thicker walled portion, said thinner walled portion being mounted within said thicker walled end section of said casing for rotation with said casing, the periphery of said tapered portion being in connection with said third channels; said thicker walled portion being dimensioned and said thinner walled portion being axially fixed to said casing so that said casing will follow said drill bit down a hole being drilled; tubular means mounted within said casing to provide a continuously unobstructed passage between said drill bit and the top of said casing and dimensioned to

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  • 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)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
US770036A 1967-09-26 1968-10-23 Core type hammer drill with annular piston Expired - Lifetime US3524511A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671558974 DE1558974A1 (de) 1967-09-26 1967-09-26 Ringtieflochhammer

Publications (1)

Publication Number Publication Date
US3524511A true US3524511A (en) 1970-08-18

Family

ID=5677428

Family Applications (1)

Application Number Title Priority Date Filing Date
US770036A Expired - Lifetime US3524511A (en) 1967-09-26 1968-10-23 Core type hammer drill with annular piston

Country Status (7)

Country Link
US (1) US3524511A (enrdf_load_stackoverflow)
AT (1) AT286902B (enrdf_load_stackoverflow)
BE (1) BE721369A (enrdf_load_stackoverflow)
DE (1) DE1558974A1 (enrdf_load_stackoverflow)
FR (1) FR1585508A (enrdf_load_stackoverflow)
GB (1) GB1188619A (enrdf_load_stackoverflow)
SE (1) SE348794B (enrdf_load_stackoverflow)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3854539A (en) * 1972-08-23 1974-12-17 Tigre Tierra Drilling apparatus with down hole motor
US3871486A (en) * 1973-08-29 1975-03-18 Bakerdrill Inc Continuous coring system and apparatus
US3874464A (en) * 1972-08-23 1975-04-01 Tigre Tierra Processing of drilling an earth formation
US3893524A (en) * 1972-08-23 1975-07-08 Tigre Tierra Rotary drill rod
US3895680A (en) * 1971-12-28 1975-07-22 Allen B Cook Fluid actuated hammer
US3903975A (en) * 1972-08-23 1975-09-09 Tigre Tierra Drilling apparatus with down-the-hole motor
US3933209A (en) * 1972-08-23 1976-01-20 Tigre Tierra, Inc. Drilling apparatus and technique using down-hole motor
US3990524A (en) * 1974-06-03 1976-11-09 Tigre Tierra, Inc. Down-the-hole motor for rotary drill rod and process for drilling using the same
US4002213A (en) * 1974-03-01 1977-01-11 Tigre Tierra, Inc. Down-the-hole motor for rotary drill rod and process for drilling using the same
DE2854461A1 (de) * 1978-12-16 1980-06-19 Hydroc Gmbh Ringbohrhammer
US4705119A (en) * 1985-09-16 1987-11-10 Institut Gornogo Dela So An Sssr Annular air-hammer apparatus for drilling holes
US4722403A (en) * 1985-08-06 1988-02-02 Institut Gornogo Dela Sibirskogo Otdelenia Akademii Nauk Sssr Annular air-hammer apparatus for drilling holes
US4739844A (en) * 1984-04-02 1988-04-26 Becker Drills, Inc. Hammer drill bit and sub-assembly
WO1988003220A1 (en) * 1986-10-24 1988-05-05 William Lister A pneumatic percussion hammer
US4819746A (en) * 1987-01-13 1989-04-11 Minroc Technical Promotions Ltd. Reverse circulation down-the-hole hammer drill and bit therefor
WO1994023172A1 (en) * 1993-04-05 1994-10-13 Sds Pty. Ltd. Rotary percussive core drill bit
US5494119A (en) * 1994-07-12 1996-02-27 Tully; Francis X. Core sampling device
US5992545A (en) * 1997-07-02 1999-11-30 Uniroc Ab Down-the-hole drilling machine
US6227307B1 (en) * 1998-12-04 2001-05-08 Daemo Engineering Co., Ltd Sound and dust proof breaker
US20100084193A1 (en) * 2007-01-24 2010-04-08 J.I. Livingstone Enterprises Ltd. Air hammer coring apparatus and method
US20150300117A1 (en) * 2012-11-08 2015-10-22 Flexidrill Limited Seated hammer apparatus for core sampling

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8514505D0 (en) * 1985-06-07 1985-07-10 Weaver & Hurt Ltd Rock drills
AUPM720294A0 (en) * 1994-08-01 1994-08-25 Sds Pacific Pte Ltd Inner sleeve for a fluid operated piston type hammer
CN105401878B (zh) * 2015-12-03 2019-04-09 山河智能装备股份有限公司 一种大直径潜孔锤钻机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1087632A (en) * 1912-06-17 1914-02-17 William S Benjamin Rock-drilling machine.
US1834583A (en) * 1924-01-29 1931-12-01 Sullivan Machinery Co Core drill
US3075589A (en) * 1958-08-18 1963-01-29 Gas Drilling Services Co Dual passage drilling stem having selfcontained valve means
US3207240A (en) * 1961-10-31 1965-09-21 Tiefbohr Messdienst Leutert & Apparatus for the drilling of and the protection of drill cores in deep-welldrilling operations
US3299971A (en) * 1964-08-06 1967-01-24 Ingersoll Rand Co Core drill

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1087632A (en) * 1912-06-17 1914-02-17 William S Benjamin Rock-drilling machine.
US1834583A (en) * 1924-01-29 1931-12-01 Sullivan Machinery Co Core drill
US3075589A (en) * 1958-08-18 1963-01-29 Gas Drilling Services Co Dual passage drilling stem having selfcontained valve means
US3207240A (en) * 1961-10-31 1965-09-21 Tiefbohr Messdienst Leutert & Apparatus for the drilling of and the protection of drill cores in deep-welldrilling operations
US3299971A (en) * 1964-08-06 1967-01-24 Ingersoll Rand Co Core drill

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3895680A (en) * 1971-12-28 1975-07-22 Allen B Cook Fluid actuated hammer
US3854539A (en) * 1972-08-23 1974-12-17 Tigre Tierra Drilling apparatus with down hole motor
US3874464A (en) * 1972-08-23 1975-04-01 Tigre Tierra Processing of drilling an earth formation
US3893524A (en) * 1972-08-23 1975-07-08 Tigre Tierra Rotary drill rod
US3903975A (en) * 1972-08-23 1975-09-09 Tigre Tierra Drilling apparatus with down-the-hole motor
US3933209A (en) * 1972-08-23 1976-01-20 Tigre Tierra, Inc. Drilling apparatus and technique using down-hole motor
US3871486A (en) * 1973-08-29 1975-03-18 Bakerdrill Inc Continuous coring system and apparatus
US3941196A (en) * 1973-08-29 1976-03-02 Bakerdrill, Inc. Percussive air hammer and core bit apparatus
US4002213A (en) * 1974-03-01 1977-01-11 Tigre Tierra, Inc. Down-the-hole motor for rotary drill rod and process for drilling using the same
US3990524A (en) * 1974-06-03 1976-11-09 Tigre Tierra, Inc. Down-the-hole motor for rotary drill rod and process for drilling using the same
DE2854461A1 (de) * 1978-12-16 1980-06-19 Hydroc Gmbh Ringbohrhammer
US4321974A (en) * 1978-12-16 1982-03-30 Hydroc Gesteinsbohrtechnik Gmbh Annular drilling hammer
US4739844A (en) * 1984-04-02 1988-04-26 Becker Drills, Inc. Hammer drill bit and sub-assembly
US4722403A (en) * 1985-08-06 1988-02-02 Institut Gornogo Dela Sibirskogo Otdelenia Akademii Nauk Sssr Annular air-hammer apparatus for drilling holes
US4705119A (en) * 1985-09-16 1987-11-10 Institut Gornogo Dela So An Sssr Annular air-hammer apparatus for drilling holes
GB2215757B (en) * 1986-10-24 1990-05-30 William Lister A pneumatic percussion hammer
WO1988003220A1 (en) * 1986-10-24 1988-05-05 William Lister A pneumatic percussion hammer
GB2215757A (en) * 1986-10-24 1989-09-27 William Lister A pneumatic percussion hammer
US4911250A (en) * 1986-10-24 1990-03-27 William Lister Pneumatic percussion hammer
US4819746A (en) * 1987-01-13 1989-04-11 Minroc Technical Promotions Ltd. Reverse circulation down-the-hole hammer drill and bit therefor
WO1994023172A1 (en) * 1993-04-05 1994-10-13 Sds Pty. Ltd. Rotary percussive core drill bit
US5494119A (en) * 1994-07-12 1996-02-27 Tully; Francis X. Core sampling device
US5992545A (en) * 1997-07-02 1999-11-30 Uniroc Ab Down-the-hole drilling machine
US6227307B1 (en) * 1998-12-04 2001-05-08 Daemo Engineering Co., Ltd Sound and dust proof breaker
US20100084193A1 (en) * 2007-01-24 2010-04-08 J.I. Livingstone Enterprises Ltd. Air hammer coring apparatus and method
US8757293B2 (en) 2007-01-24 2014-06-24 J. I. Livingstone Enterprises Ltd. Air hammer coring apparatus and method
US20150300117A1 (en) * 2012-11-08 2015-10-22 Flexidrill Limited Seated hammer apparatus for core sampling
US9803441B2 (en) * 2012-11-08 2017-10-31 Flexidrill Limited Seated hammer apparatus for core sampling

Also Published As

Publication number Publication date
GB1188619A (en) 1970-04-22
DE1558974A1 (de) 1970-04-02
SE348794B (enrdf_load_stackoverflow) 1972-09-11
FR1585508A (enrdf_load_stackoverflow) 1970-01-23
BE721369A (enrdf_load_stackoverflow) 1969-03-03
AT286902B (de) 1970-12-28

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