GB1495914A - Side cutting device for earth coring procedures - Google Patents

Side cutting device for earth coring procedures

Info

Publication number
GB1495914A
GB1495914A GB9540/76A GB954076A GB1495914A GB 1495914 A GB1495914 A GB 1495914A GB 9540/76 A GB9540/76 A GB 9540/76A GB 954076 A GB954076 A GB 954076A GB 1495914 A GB1495914 A GB 1495914A
Authority
GB
United Kingdom
Prior art keywords
bore
cutter
pipe
tool
pilot
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
GB9540/76A
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.)
ARMADILLO HOLDINGS Ltd
Original Assignee
ARMADILLO HOLDINGS 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 ARMADILLO HOLDINGS Ltd filed Critical ARMADILLO HOLDINGS Ltd
Publication of GB1495914A publication Critical patent/GB1495914A/en
Expired legal-status Critical Current

Links

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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring
    • 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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/10—Correction of deflected boreholes

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

1495914 Side cutters ARMADILLO HOLDINGS Ltd 10 March 1976 [16 April 1975] 09540/76 Heading E1F A side cutting tool for use in straightening a pilot borehole drilled from a lower to an upper chamber includes a pipe 16 for connection to the top of the drill string in place of the pilot bit once the. latter has broken through into the upper chamber. Extending from side of the pipe is a box-section cutter 18 composed of sharp-edged plates 20, 23 of which the plates 20 have tangs 29 and converging slotted trailing ends 32, 33, while plate 23 has its ends 23, 24 curved inwards towards the pipe. In use, the tool is oriented with the cutter disposed at the side of the pilot bore which needs to be cut away to straighten the bore, and the tool is then reciprocated to enlarge the bore. On each down stroke, the cutter cuts out a rectangular plug of material from the side of the bore, and on the succeeding upstroke the cutter carries the plug out of the bore.
GB9540/76A 1975-04-16 1976-03-10 Side cutting device for earth coring procedures Expired GB1495914A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA224,928A CA1022150A (en) 1975-04-16 1975-04-16 Side cutting device for earth boring procedures

Publications (1)

Publication Number Publication Date
GB1495914A true GB1495914A (en) 1977-12-21

Family

ID=4102848

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9540/76A Expired GB1495914A (en) 1975-04-16 1976-03-10 Side cutting device for earth coring procedures

Country Status (3)

Country Link
AU (1) AU496843B2 (en)
CA (1) CA1022150A (en)
GB (1) GB1495914A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259103A (en) * 1991-08-30 1993-03-03 Compair Holman Ltd Improved drilling apparatus
AU690235B2 (en) * 1994-02-22 1998-04-23 Timothy R. Coss Pilot hole corrective alignment method for trenchless pipeline installation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112727359A (en) * 2020-12-25 2021-04-30 中铁广州工程局集团深圳工程有限公司 CFG pile drilling machine structure in high-voltage line low-clearance environment and construction method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259103A (en) * 1991-08-30 1993-03-03 Compair Holman Ltd Improved drilling apparatus
AU690235B2 (en) * 1994-02-22 1998-04-23 Timothy R. Coss Pilot hole corrective alignment method for trenchless pipeline installation

Also Published As

Publication number Publication date
AU1207476A (en) 1977-09-22
CA1022150A (en) 1977-12-06
AU496843B2 (en) 1978-11-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee