GB1494413A - Core sampling drill - Google Patents

Core sampling drill

Info

Publication number
GB1494413A
GB1494413A GB25949/75A GB2594975A GB1494413A GB 1494413 A GB1494413 A GB 1494413A GB 25949/75 A GB25949/75 A GB 25949/75A GB 2594975 A GB2594975 A GB 2594975A GB 1494413 A GB1494413 A GB 1494413A
Authority
GB
United Kingdom
Prior art keywords
bit
drill
core
core tube
drill bit
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
Application number
GB25949/75A
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.)
WALLIS GEOCHEM DRILLING CO Pty
Original Assignee
WALLIS GEOCHEM DRILLING CO Pty
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 WALLIS GEOCHEM DRILLING CO Pty filed Critical WALLIS GEOCHEM DRILLING CO Pty
Publication of GB1494413A publication Critical patent/GB1494413A/en
Expired 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
    • E21B10/00—Drill bits
    • E21B10/02—Core bits
    • 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
    • E21B10/00—Drill bits
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/605—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a core-bit
    • 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

Abstract

1494413 Boring earth &c WALLIS GEOCHEMICAL DRILLING CO PTY Ltd 18 June 1975 [17 Dec 1974] 25949/75 Heading E1F A core sampling drill includes a drill bit 11 having a series of cutting surfaces, e.g. tungsten carbide members 13, disposed around a central core passage 14, the upper end of the bit 11 being screw threaded so that it can be attached to the lower end of a drill stem section 12. A core tube 16 is positioned concentrically, with its lower end within the drill bit, to provide an outer annular passage 17. At the inside of the wall of the bit 11 is formed an annular recess 15 of arcuate cross section so that air passed downwardly through the outer annular passage is turned and directed upwardly into the core tube 16, material cut by the drill bit being entrained therein. Preferably, the lower end of the core tube 16 is flared, as shown.
GB25949/75A 1974-12-17 1975-06-18 Core sampling drill Expired GB1494413A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU76527/74A AU484907B2 (en) 1974-12-17 1974-12-17 Improved core sampling drill

Publications (1)

Publication Number Publication Date
GB1494413A true GB1494413A (en) 1977-12-07

Family

ID=3757462

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25949/75A Expired GB1494413A (en) 1974-12-17 1975-06-18 Core sampling drill

Country Status (4)

Country Link
AU (1) AU484907B2 (en)
GB (1) GB1494413A (en)
MY (1) MY7800252A (en)
ZA (1) ZA753605B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2016266110B2 (en) * 2015-12-02 2022-09-22 Wallis Engineers Pty Ltd A Reverse Circulation Down Hole Hammer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU631220B2 (en) * 1989-06-19 1992-11-19 John Kitching Reverse circulation drilling apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2016266110B2 (en) * 2015-12-02 2022-09-22 Wallis Engineers Pty Ltd A Reverse Circulation Down Hole Hammer

Also Published As

Publication number Publication date
ZA753605B (en) 1976-05-26
MY7800252A (en) 1978-12-31
AU484907B2 (en) 1976-06-17
AU7652774A (en) 1976-06-17

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19950617