FI923240A - Tools for stroke and rotary drilling - Google Patents

Tools for stroke and rotary drilling Download PDF

Info

Publication number
FI923240A
FI923240A FI923240A FI923240A FI923240A FI 923240 A FI923240 A FI 923240A FI 923240 A FI923240 A FI 923240A FI 923240 A FI923240 A FI 923240A FI 923240 A FI923240 A FI 923240A
Authority
FI
Finland
Prior art keywords
inserts
reamer
shaft
drilling
casing tube
Prior art date
Application number
FI923240A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI98155C (en
FI923240A0 (en
FI98155B (en
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
Publication of FI923240A0 publication Critical patent/FI923240A0/en
Publication of FI923240A publication Critical patent/FI923240A/en
Application granted granted Critical
Publication of FI98155B publication Critical patent/FI98155B/en
Publication of FI98155C publication Critical patent/FI98155C/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
    • E21B10/36—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
    • E21B10/26—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
    • E21B10/64—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.
FI923240A 1990-01-17 1992-07-15 Impact and drilling tool FI98155C (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
SE9000157 1990-01-17
SE9000157A SE467886B (en) 1990-01-17 1990-01-17 Reamer for drilling tool for percussion and rotary drilling
SE9000156 1990-01-17
SE9000156A SE467632B (en) 1990-01-17 1990-01-17 DRILLING TOOL FOR BATTING AND ROTATING DRILLING WHILE CONDUCTING A FEEDING PIPE
SE9100034 1991-01-07
PCT/SE1991/000034 WO1991010805A1 (en) 1990-01-17 1991-01-17 Drilling tool for percussive and rotary drilling

Publications (4)

Publication Number Publication Date
FI923240A0 FI923240A0 (en) 1992-07-15
FI923240A true FI923240A (en) 1992-07-15
FI98155B FI98155B (en) 1997-01-15
FI98155C FI98155C (en) 1997-04-25

Family

ID=26660694

Family Applications (1)

Application Number Title Priority Date Filing Date
FI923240A FI98155C (en) 1990-01-17 1992-07-15 Impact and drilling tool

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
ATE108861T1 (en) 1994-08-15
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
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
BB Publication of examined application