ATE108861T1 - DRILLING TOOL FOR IMPACT AND ROTARY DRILLING. - Google Patents

DRILLING TOOL FOR IMPACT AND ROTARY DRILLING.

Info

Publication number
ATE108861T1
ATE108861T1 AT91903724T AT91903724T ATE108861T1 AT E108861 T1 ATE108861 T1 AT E108861T1 AT 91903724 T AT91903724 T AT 91903724T AT 91903724 T AT91903724 T AT 91903724T AT E108861 T1 ATE108861 T1 AT E108861T1
Authority
AT
Austria
Prior art keywords
inserts
drilling
reamer
shaft
casing tube
Prior art date
Application number
AT91903724T
Other languages
German (de)
Inventor
Karl-Axel Stjernstroem
Stig Uno Loef
Original Assignee
Uniroc Ab
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
Priority claimed from SE9000157A external-priority patent/SE467886B/en
Priority claimed from SE9000156A external-priority patent/SE467632B/en
Application filed by Uniroc Ab filed Critical Uniroc Ab
Application granted granted Critical
Publication of ATE108861T1 publication Critical patent/ATE108861T1/en

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
    • E21B10/327—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 the cutter being pivoted about a longitudinal axis
    • 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
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion
    • 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
    • E21B10/64—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
    • E21B10/66—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe the cutting element movable through the drilling pipe and laterally shiftable
    • 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
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes

Abstract

A drilling tool for percussive and rotary drilling in advance of a trailing casing tube (20) has a reamer (15) pivotally journalled on an eccentric shaft (12) rearwardly of a centric pilot bit (11). The reamer (15) has an eccentric portion (32) carrying axially directed hard metal button inserts (36-40) grouped within an acute angle (V) of a circle sector centered on the drilling axis (C). The inserts comprise primary inserts (36-38) with a radial reach defining the full diameter of the drilled hole and inner secondary inserts (39, 40) closer to the shaft (12). The reamer (15) is pivotable on the shaft (12) between a projected and a retracted position. When projected, the group of button inserts (36-40) ream up the hole from the diameter drilled by the pilot bit (11) to the full diameter of the hole enabling the casing tube (20) to advance. In the retracted position the drilling tool (10) can pass through the casing tube (20). A duality of inserts (36, 39) leading in the rotational direction act jointly to break the rock in said direction substantially tangentially relative to the shaft (12). The rock cuttings from the button inserts (36-40) are subjected to enhanced flushing action. Optionally such flushing action is further supported by a groove (52) on the rotationally leading flank of the reamer (15). A cutting edge (54) on the groove (52) is reinforced by stellite and improves drilling of claybound ground.
AT91903724T 1990-01-17 1991-01-17 DRILLING TOOL FOR IMPACT AND ROTARY DRILLING. ATE108861T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9000157A SE467886B (en) 1990-01-17 1990-01-17 Reamer for drilling tool for percussion and rotary drilling
SE9000156A SE467632B (en) 1990-01-17 1990-01-17 DRILLING TOOL FOR BATTING AND ROTATING DRILLING WHILE CONDUCTING A FEEDING PIPE

Publications (1)

Publication Number Publication Date
ATE108861T1 true ATE108861T1 (en) 1994-08-15

Family

ID=26660694

Family Applications (1)

Application Number Title Priority Date Filing Date
AT91903724T ATE108861T1 (en) 1990-01-17 1991-01-17 DRILLING TOOL FOR IMPACT AND ROTARY DRILLING.

Country Status (8)

Country Link
EP (1) EP0511298B1 (en)
JP (1) JPH05503556A (en)
AT (1) ATE108861T1 (en)
AU (1) AU642708B2 (en)
CA (1) CA2074076A1 (en)
DE (1) DE69102993T2 (en)
FI (1) FI98155C (en)
WO (1) WO1991010805A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2338009B (en) * 1998-06-04 2000-06-21 Philip Head A method of installing the casing in a well and apparatus therefor
US6607046B1 (en) * 1999-11-12 2003-08-19 Shell Oil Company Expandable drill bit
SE522135C2 (en) * 2001-07-02 2004-01-13 Uno Loef Drilling tools for lowering drilling
ZA200606939B (en) * 2005-08-25 2007-11-28 Gien Bernard L A dril bit
SE530651C2 (en) * 2005-09-05 2008-07-29 Sandvik Intellectual Property Drill bit for one-stage anchor bolts and one-stage drilling equipment
DE102010027544A1 (en) 2010-07-16 2012-01-19 Minova International Ltd. Method for producing the drilling devices, especially for the pipe screen technology and drilling device
JP5994015B1 (en) * 2015-12-03 2016-09-21 株式会社オーク Bit for down the hole hammer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE421551B (en) * 1980-03-26 1982-01-04 Sandvik Ab DRILLING TOOL FOR ROTATION AND / OR DRILLING
GB8418482D0 (en) * 1984-07-19 1984-08-22 Nl Petroleum Prod Rotary drill bits

Also Published As

Publication number Publication date
FI98155C (en) 1997-04-25
WO1991010805A1 (en) 1991-07-25
DE69102993T2 (en) 1995-03-02
AU642708B2 (en) 1993-10-28
EP0511298A1 (en) 1992-11-04
FI923240A0 (en) 1992-07-15
DE69102993D1 (en) 1994-08-25
FI923240A (en) 1992-07-15
EP0511298B1 (en) 1994-07-20
CA2074076A1 (en) 1991-07-18
FI98155B (en) 1997-01-15
AU7228091A (en) 1991-08-05
JPH05503556A (en) 1993-06-10

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee