GB1427528A - Device for making under-reams for ground anchors - Google Patents

Device for making under-reams for ground anchors

Info

Publication number
GB1427528A
GB1427528A GB5359572A GB5359572A GB1427528A GB 1427528 A GB1427528 A GB 1427528A GB 5359572 A GB5359572 A GB 5359572A GB 5359572 A GB5359572 A GB 5359572A GB 1427528 A GB1427528 A GB 1427528A
Authority
GB
United Kingdom
Prior art keywords
body portion
collar
reams
nov
making under
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
GB5359572A
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.)
READER SONS Ltd E
Original Assignee
READER SONS Ltd E
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 READER SONS Ltd E filed Critical READER SONS Ltd E
Priority to GB5359572A priority Critical patent/GB1427528A/en
Publication of GB1427528A publication Critical patent/GB1427528A/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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/003—Machines for drilling anchor holes and setting anchor bolts

Abstract

1427528 Boring earth &c E READER & SONS Ltd 9 Nov 1973 [20 Nov 1972] 53595/ 72 Heading E1F An under-reamer comprises a body portion 1", Fig. 3A, and non-resiliently flexible extendable means 2", 3", 4" mounted thereon for centrifugal extension from the body portion on rotation thereof. The extendable means may comprise one or more lengths of chain, wire, or pivoted elements. A plurality of axially-spaced groups of extendable means may be provided to form a plurality of underreams simultaneously. In an alternative embodiment, Fig. 5B, chains 22 are connected at their upper ends to a fixed collar 24 and at their lower ends to a slidable collar 26. The collar 26 may cooperate with a signalling means (not shown) when in a predetermined position to indicate completion of the underream. The body portion may be hollow for the passage of flushing fluid.
GB5359572A 1972-11-20 1972-11-20 Device for making under-reams for ground anchors Expired GB1427528A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5359572A GB1427528A (en) 1972-11-20 1972-11-20 Device for making under-reams for ground anchors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5359572A GB1427528A (en) 1972-11-20 1972-11-20 Device for making under-reams for ground anchors

Publications (1)

Publication Number Publication Date
GB1427528A true GB1427528A (en) 1976-03-10

Family

ID=10468354

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5359572A Expired GB1427528A (en) 1972-11-20 1972-11-20 Device for making under-reams for ground anchors

Country Status (1)

Country Link
GB (1) GB1427528A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2575776A1 (en) * 1985-01-04 1986-07-11 Juei Jse Lin Method of constructing cast-in-place concrete pile
WO1999054586A1 (en) * 1998-04-17 1999-10-28 G & G Gas, Inc. Method and apparatus for rotary mining
WO2001077445A1 (en) * 2000-04-11 2001-10-18 Stump Spezialtiefbau Gmbh Method and device for the production of back-cut cavities
WO2009032468A1 (en) * 2007-08-29 2009-03-12 Gourley Larry P Method and apparatus for rotary mining
CN114953053A (en) * 2022-06-27 2022-08-30 林青 Desktop cutting device is used in processing of multi-functional desk

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2575776A1 (en) * 1985-01-04 1986-07-11 Juei Jse Lin Method of constructing cast-in-place concrete pile
WO1999054586A1 (en) * 1998-04-17 1999-10-28 G & G Gas, Inc. Method and apparatus for rotary mining
US6065551A (en) * 1998-04-17 2000-05-23 G & G Gas, Inc. Method and apparatus for rotary mining
WO2001077445A1 (en) * 2000-04-11 2001-10-18 Stump Spezialtiefbau Gmbh Method and device for the production of back-cut cavities
WO2009032468A1 (en) * 2007-08-29 2009-03-12 Gourley Larry P Method and apparatus for rotary mining
US7770670B2 (en) 2007-08-29 2010-08-10 Gourley Larry P Apparatus for rotary mining
US7997356B2 (en) 2007-08-29 2011-08-16 Gourley Larry P Apparatus for rotary mining
US8381842B2 (en) 2007-08-29 2013-02-26 Larry P. Gourley Apparatus for rotary mining
CN114953053A (en) * 2022-06-27 2022-08-30 林青 Desktop cutting device is used in processing of multi-functional desk
CN114953053B (en) * 2022-06-27 2023-06-09 东莞市翔泉家具有限公司 Table top cutting device for processing multifunctional office table

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee