SG10201404788WA - Casing bit and casing reamer designs - Google Patents

Casing bit and casing reamer designs

Info

Publication number
SG10201404788WA
SG10201404788WA SG10201404788WA SG10201404788WA SG10201404788WA SG 10201404788W A SG10201404788W A SG 10201404788WA SG 10201404788W A SG10201404788W A SG 10201404788WA SG 10201404788W A SG10201404788W A SG 10201404788WA SG 10201404788W A SG10201404788W A SG 10201404788WA
Authority
SG
Singapore
Prior art keywords
casing
bit
reamer designs
designs
reamer
Prior art date
Application number
SG10201404788WA
Inventor
William W King
Steven W Drews
Michael R Reese
Ian Alastair Kirk
Original Assignee
Varel Int Ind Lp
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 Varel Int Ind Lp filed Critical Varel Int Ind Lp
Publication of SG10201404788WA publication Critical patent/SG10201404788WA/en

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/14Casing shoes for the protection of the bottom of the casing
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/20Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
SG10201404788WA 2009-06-05 2010-06-03 Casing bit and casing reamer designs SG10201404788WA (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US18463509P 2009-06-05 2009-06-05
US12/793,489 US8561729B2 (en) 2009-06-05 2010-06-03 Casing bit and casing reamer designs

Publications (1)

Publication Number Publication Date
SG10201404788WA true SG10201404788WA (en) 2014-10-30

Family

ID=43298169

Family Applications (2)

Application Number Title Priority Date Filing Date
SG10201404788WA SG10201404788WA (en) 2009-06-05 2010-06-03 Casing bit and casing reamer designs
SG2011075710A SG175249A1 (en) 2009-06-05 2010-06-03 Casing bit and casing reamer designs

Family Applications After (1)

Application Number Title Priority Date Filing Date
SG2011075710A SG175249A1 (en) 2009-06-05 2010-06-03 Casing bit and casing reamer designs

Country Status (8)

Country Link
US (1) US8561729B2 (en)
EP (1) EP2394016B1 (en)
CN (1) CN102414393B (en)
AU (1) AU2010256521B2 (en)
CA (1) CA2755564C (en)
RU (1) RU2544946C2 (en)
SG (2) SG10201404788WA (en)
WO (1) WO2010141781A1 (en)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7395882B2 (en) * 2004-02-19 2008-07-08 Baker Hughes Incorporated Casing and liner drilling bits
US7954571B2 (en) 2007-10-02 2011-06-07 Baker Hughes Incorporated Cutting structures for casing component drillout and earth-boring drill bits including same
US9085939B2 (en) * 2007-11-14 2015-07-21 Baker Hughes Incorporated Earth-boring tools attachable to a casing string and methods for their manufacture
US10195687B2 (en) * 2008-08-20 2019-02-05 Foro Energy, Inc. High power laser tunneling mining and construction equipment and methods of use
GB0900606D0 (en) 2009-01-15 2009-02-25 Downhole Products Plc Tubing shoe
US8517123B2 (en) * 2009-05-29 2013-08-27 Varel International, Ind., L.P. Milling cap for a polycrystalline diamond compact cutter
US20110209922A1 (en) * 2009-06-05 2011-09-01 Varel International Casing end tool
US8074749B2 (en) 2009-09-11 2011-12-13 Weatherford/Lamb, Inc. Earth removal member with features for facilitating drill-through
GB201004603D0 (en) * 2010-03-19 2010-05-05 2Td Ltd Drill bit
WO2012088323A2 (en) 2010-12-22 2012-06-28 Weatherford/Lamb, Inc. Earth removal member with features for facilitating drill-through
DE102013205889B3 (en) 2013-04-03 2014-05-28 Kennametal Inc. Coupling structure e.g. cutting head for rotary tool e.g. drilling tool, has coupling pin with clamping faces and stop surfaces that are arranged in different dispensing areas
US9376866B2 (en) 2013-08-23 2016-06-28 Varel International Ind., L.P. Hybrid rotary cone drill bit
DE102013220884B4 (en) 2013-10-15 2022-02-17 Kennametal Inc. Modular carrier tool and tool head
US9828810B2 (en) 2014-02-07 2017-11-28 Varel International Ind., L.P. Mill-drill cutter and drill bit
DE102014206796B4 (en) 2014-04-08 2020-10-15 Kennametal Inc. Rotary tool, in particular drill and cutting head for such a rotary tool
WO2016142534A2 (en) * 2015-03-11 2016-09-15 Tercel Oilfield Products Belgium Sa Downhole tool and bottom hole assembly for running a string in a wellbore
DE102015211744B4 (en) 2015-06-24 2023-07-20 Kennametal Inc. Rotary tool, in particular a drill, and cutting head for such a rotary tool
USD798922S1 (en) 2015-10-07 2017-10-03 Kennametal Inc. Cutting head for rotary drill
USD798921S1 (en) 2015-10-07 2017-10-03 Kennametal Inc. Cutting head for modular drill
US10071430B2 (en) 2015-10-07 2018-09-11 Kennametal Inc. Cutting head, rotary tool and support for the rotary tool and for the accommodation of the cutting head
US9937567B2 (en) 2015-10-07 2018-04-10 Kennametal Inc. Modular drill
US10012325B2 (en) * 2015-10-09 2018-07-03 Master Flo Valve Inc. Cage valve with flow trim for reduced port erosion
WO2017142815A1 (en) 2016-02-16 2017-08-24 Extreme Rock Destruction LLC Drilling machine
US10428584B2 (en) 2016-07-13 2019-10-01 Varel International Ind., L.P. Bit for drilling with casing or liner string and manufacture thereof
US10890030B2 (en) * 2016-12-28 2021-01-12 Xr Lateral Llc Method, apparatus by method, and apparatus of guidance positioning members for directional drilling
US11255136B2 (en) 2016-12-28 2022-02-22 Xr Lateral Llc Bottom hole assemblies for directional drilling
WO2019014142A1 (en) 2017-07-12 2019-01-17 Extreme Rock Destruction, LLC Laterally oriented cutting structures
US10799958B2 (en) 2017-08-21 2020-10-13 Kennametal Inc. Modular rotary cutting tool
USD940207S1 (en) * 2018-11-02 2022-01-04 Vulcan Completion Products Uk Limited Nose for a shoe suitable for use in an oil and gas wellbore
CN112077370A (en) 2019-06-13 2020-12-15 肯纳金属印度有限公司 Indexable drill insert
RU192852U1 (en) * 2019-07-03 2019-10-03 Государственное бюджетное образовательное учреждение высшего образования "Альметьевский государственный нефтяной институт" Shoe Chisel
RU2715483C1 (en) * 2019-10-22 2020-02-28 Публичное акционерное общество «Татнефть» имени В.Д. Шашина Drill bit for drilling on casing string
RU2730159C1 (en) * 2020-04-02 2020-08-19 Публичное акционерное общество «Татнефть» имени В.Д. Шашина Drilling bit at casing string
RU2766136C1 (en) * 2021-08-17 2022-02-08 Публичное акционерное общество «Татнефть» имени В.Д. Шашина Bit for drilling on casing string

Family Cites Families (115)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1970761A (en) * 1932-10-03 1934-08-21 John Eastman Whipstock
US2196528A (en) * 1937-10-28 1940-04-09 Eastman Oil Well Survey Corp O Knuckle anchor for whipstocks
US2207920A (en) * 1937-10-28 1940-07-16 Eastman Oil Well Survey Corp Expanding foot piece for whipstocks
US2136748A (en) * 1937-12-13 1938-11-15 Morris A Lottinger Means for setting whipstocks in wells
US2215913A (en) * 1938-10-04 1940-09-24 Standard Oil Co California Method and apparatus for operating wells
US2357330A (en) * 1940-04-02 1944-09-05 Sperry Sun Well Surveying Co Whipstock assembly
US2334746A (en) * 1940-11-12 1943-11-23 Drilling And Exploration Compa Collapsible whipstock
US2331293A (en) * 1941-11-05 1943-10-12 Sperry Sun Well Surveying Co Whipstock
US2492794A (en) * 1944-08-28 1949-12-27 Eastman Oil Well Survey Co Methods of and apparatus for transmitting intelligence to the surface from well bores
US2495439A (en) * 1945-08-08 1950-01-24 Neville B Brimble Side wall sample taker
US2493178A (en) * 1946-06-03 1950-01-03 Jr Edward B Williams Drill bit
US2658284A (en) * 1949-01-03 1953-11-10 Arps Jan Jacob Continuous directional drilling
US2642267A (en) * 1951-01-17 1953-06-16 John A Zublin Apparatus for initiating and drilling deviating curved bores from existing vertical wll bores
US2644672A (en) 1951-01-29 1953-07-07 Ted C Mathews Diamond bit protector
US2669429A (en) * 1951-11-06 1954-02-16 John A Zublin Apparatus for drilling deviating bores utilizing a plurality of curved tubular drillguide sections
US2708105A (en) * 1953-08-31 1955-05-10 Jr Edward B Williams Combination core and plug bit
US2869825A (en) * 1953-10-26 1959-01-20 Phillips Petroleum Co Earth boring
US3266577A (en) * 1963-10-14 1966-08-16 Pan American Petroleum Corp Guide shoe
US3499198A (en) 1965-07-01 1970-03-10 Warner Swasey Co Cutoff tool having deformable fixturing means
US3536150A (en) * 1968-09-05 1970-10-27 Frank E Stebley Rotary-percussion drill bit
US4101318A (en) * 1976-12-10 1978-07-18 Erwin Rudy Cemented carbide-steel composites for earthmoving and mining applications
US4351401A (en) * 1978-06-08 1982-09-28 Christensen, Inc. Earth-boring drill bits
CA1166237A (en) 1980-01-10 1984-04-24 John D. Barr Rotary drill bits
US4478298A (en) 1982-12-13 1984-10-23 Petroleum Concepts, Inc. Drill bit stud and method of manufacture
NL189365C (en) * 1984-04-09 1993-03-16 Fundex Naamloze Vennootschap GROUND REPLACEMENT DRILL AND METHOD FOR FORMING A FOUNDATION POLE IN THE GROUND USING THAT GROUND REPLACEMENT DRILL.
US4823892A (en) * 1984-07-19 1989-04-25 Nl Petroleum Products Limited Rotary drill bits
US4889017A (en) 1984-07-19 1989-12-26 Reed Tool Co., Ltd. Rotary drill bit for use in drilling holes in subsurface earth formations
US4605343A (en) * 1984-09-20 1986-08-12 General Electric Company Sintered polycrystalline diamond compact construction with integral heat sink
US5127923A (en) 1985-01-10 1992-07-07 U.S. Synthetic Corporation Composite abrasive compact having high thermal stability
US4673044A (en) 1985-08-02 1987-06-16 Eastman Christensen Co. Earth boring bit for soft to hard formations
US4714120A (en) 1986-01-29 1987-12-22 Hughes Tool Company Diamond drill bit with co-joined cutters
US4696354A (en) * 1986-06-30 1987-09-29 Hughes Tool Company - Usa Drilling bit with full release void areas
GB8713807D0 (en) * 1987-06-12 1987-07-15 Nl Petroleum Prod Cutting structures for rotary drill bits
US4794986A (en) * 1987-11-27 1989-01-03 Weatherford U.S., Inc. Reticulated centralizing apparatus
US4815342A (en) 1987-12-15 1989-03-28 Amoco Corporation Method for modeling and building drill bits
US4869330A (en) * 1988-01-20 1989-09-26 Eastman Christensen Company Apparatus for establishing hydraulic flow regime in drill bits
WO1990001384A1 (en) * 1988-08-02 1990-02-22 Astec Developments Limited Investment casting process
US5042596A (en) 1989-02-21 1991-08-27 Amoco Corporation Imbalance compensated drill bit
SE467632B (en) * 1990-01-17 1992-08-17 Uniroc Ab DRILLING TOOL FOR BATTING AND ROTATING DRILLING WHILE CONDUCTING A FEEDING PIPE
US5090492A (en) * 1991-02-12 1992-02-25 Dresser Industries, Inc. Drill bit with vibration stabilizers
US5244039A (en) 1991-10-31 1993-09-14 Camco Drilling Group Ltd. Rotary drill bits
US5265685A (en) * 1991-12-30 1993-11-30 Dresser Industries, Inc. Drill bit with improved insert cutter pattern
FI95618C (en) * 1992-12-03 1998-09-03 Jorma Jaervelae Downhole
US5330016A (en) 1993-05-07 1994-07-19 Barold Technology, Inc. Drill bit and other downhole tools having electro-negative surfaces and sacrificial anodes to reduce mud balling
US5826651A (en) * 1993-09-10 1998-10-27 Weatherford/Lamb, Inc. Wellbore single trip milling
US5887668A (en) * 1993-09-10 1999-03-30 Weatherford/Lamb, Inc. Wellbore milling-- drilling
US5441121A (en) * 1993-12-22 1995-08-15 Baker Hughes, Inc. Earth boring drill bit with shell supporting an external drilling surface
GB9404857D0 (en) 1994-03-12 1994-04-27 Downhole Products Uk Ltd Casing centraliser
US5582261A (en) * 1994-08-10 1996-12-10 Smith International, Inc. Drill bit having enhanced cutting structure and stabilizing features
US5549171A (en) * 1994-08-10 1996-08-27 Smith International, Inc. Drill bit with performance-improving cutting structure
US5551522A (en) 1994-10-12 1996-09-03 Smith International, Inc. Drill bit having stability enhancing cutting structure
GB9421924D0 (en) * 1994-11-01 1994-12-21 Camco Drilling Group Ltd Improvements in or relating to rotary drill bits
GB9504968D0 (en) * 1995-03-11 1995-04-26 Brit Bit Limited Improved casing shoe
US6063502A (en) * 1996-08-01 2000-05-16 Smith International, Inc. Composite construction with oriented microstructure
US5979571A (en) * 1996-09-27 1999-11-09 Baker Hughes Incorporated Combination milling tool and drill bit
US6138756A (en) * 1998-01-09 2000-10-31 Halliburton Energy Services, Inc. Milling guide having orientation and depth determination capabilities
GB2339227B (en) 1998-01-24 2002-11-20 Downhole Products Plc Downhole Tool
US6401820B1 (en) * 1998-01-24 2002-06-11 Downhole Products Plc Downhole tool
US6039127A (en) * 1998-03-13 2000-03-21 Loudon Enterprises, Inc. Rock drill
CA2261495A1 (en) * 1998-03-13 1999-09-13 Praful C. Desai Method for milling casing and drilling formation
US6443247B1 (en) * 1998-06-11 2002-09-03 Weatherford/Lamb, Inc. Casing drilling shoe
GB9820693D0 (en) 1998-09-24 1998-11-18 Camco Int Uk Ltd Improvements in perform cutting elements for rotary drag-type drill bits
US6454030B1 (en) * 1999-01-25 2002-09-24 Baker Hughes Incorporated Drill bits and other articles of manufacture including a layer-manufactured shell integrally secured to a cast structure and methods of fabricating same
US7332218B1 (en) * 1999-07-14 2008-02-19 Eic Laboratories, Inc. Electrically disbonding materials
US6298930B1 (en) * 1999-08-26 2001-10-09 Baker Hughes Incorporated Drill bits with controlled cutter loading and depth of cut
US6460631B2 (en) * 1999-08-26 2002-10-08 Baker Hughes Incorporated Drill bits with reduced exposure of cutters
AUPQ302599A0 (en) * 1999-09-22 1999-10-21 Azuko Pty Ltd Drilling apparatus
US6510906B1 (en) * 1999-11-29 2003-01-28 Baker Hughes Incorporated Impregnated bit with PDC cutters in cone area
EP1242711B1 (en) * 1999-12-22 2006-08-16 Weatherford/Lamb, Inc. Drilling bit for drilling while running casing
US6454027B1 (en) * 2000-03-09 2002-09-24 Smith International, Inc. Polycrystalline diamond carbide composites
GB0005740D0 (en) * 2000-03-10 2000-05-03 Downhole Products Plc Centraliser
US6464002B1 (en) * 2000-04-10 2002-10-15 Weatherford/Lamb, Inc. Whipstock assembly
US6439326B1 (en) * 2000-04-10 2002-08-27 Smith International, Inc. Centered-leg roller cone drill bit
GB0008988D0 (en) * 2000-04-13 2000-05-31 Bbl Downhole Tools Ltd Drill bit nozzle
US7334650B2 (en) 2000-04-13 2008-02-26 Weatherford/Lamb, Inc. Apparatus and methods for drilling a wellbore using casing
US6612384B1 (en) * 2000-06-08 2003-09-02 Smith International, Inc. Cutting structure for roller cone drill bits
US6695056B2 (en) * 2000-09-11 2004-02-24 Weatherford/Lamb, Inc. System for forming a window and drilling a sidetrack wellbore
DE60140617D1 (en) 2000-09-20 2010-01-07 Camco Int Uk Ltd POLYCRYSTALLINE DIAMOND WITH A SURFACE ENRICHED ON CATALYST MATERIAL
US6592985B2 (en) 2000-09-20 2003-07-15 Camco International (Uk) Limited Polycrystalline diamond partially depleted of catalyzing material
GB0029324D0 (en) 2000-12-01 2001-01-17 Bbl Downhole Tools Ltd Shoe
US7137460B2 (en) * 2001-02-13 2006-11-21 Smith International, Inc. Back reaming tool
US6568881B2 (en) * 2001-10-15 2003-05-27 Walter Daniel Long Jet head device for sinking pilings
US6725939B2 (en) * 2002-06-18 2004-04-27 Baker Hughes Incorporated Expandable centralizer for downhole tubulars
US7036611B2 (en) * 2002-07-30 2006-05-02 Baker Hughes Incorporated Expandable reamer apparatus for enlarging boreholes while drilling and methods of use
US20040108739A1 (en) * 2002-12-10 2004-06-10 Beeman Robert S. Whipstock retrieving overshot
US6817633B2 (en) * 2002-12-20 2004-11-16 Lone Star Steel Company Tubular members and threaded connections for casing drilling and method
US20050133276A1 (en) 2003-12-17 2005-06-23 Azar Michael G. Bits and cutting structures
CA2516649C (en) * 2003-02-27 2010-01-19 Weatherford/Lamb, Inc. Drill shoe
US7322776B2 (en) * 2003-05-14 2008-01-29 Diamond Innovations, Inc. Cutting tool inserts and methods to manufacture
US20040244540A1 (en) * 2003-06-05 2004-12-09 Oldham Thomas W. Drill bit body with multiple binders
US7419086B2 (en) * 2003-07-14 2008-09-02 Honeywell International Inc. Low cost brazes for titanium
US7395882B2 (en) 2004-02-19 2008-07-08 Baker Hughes Incorporated Casing and liner drilling bits
US7117960B2 (en) * 2003-11-19 2006-10-10 James L Wheeler Bits for use in drilling with casting and method of making the same
US7624818B2 (en) * 2004-02-19 2009-12-01 Baker Hughes Incorporated Earth boring drill bits with casing component drill out capability and methods of use
GB0404170D0 (en) 2004-02-25 2004-03-31 Synergetech Ltd Improved shoe
US7455125B2 (en) * 2005-02-22 2008-11-25 Baker Hughes Incorporated Drilling tool equipped with improved cutting element layout to reduce cutter damage through formation changes, methods of design and operation thereof
US20070187149A1 (en) * 2005-06-13 2007-08-16 Gemstar Pdc Corp. Drill bit
AT8743U1 (en) * 2005-10-19 2006-12-15 Ceratizit Austria Gmbh MILLING TOOL
US7757793B2 (en) * 2005-11-01 2010-07-20 Smith International, Inc. Thermally stable polycrystalline ultra-hard constructions
SE531412C2 (en) * 2005-12-30 2009-03-31 Sandvik Intellectual Property Rock drilling tools, rock drill bit and method for manufacturing a conical cavity of a rock drill bit
US7506698B2 (en) 2006-01-30 2009-03-24 Smith International, Inc. Cutting elements and bits incorporating the same
US20070246224A1 (en) * 2006-04-24 2007-10-25 Christiaan Krauss Offset valve system for downhole drillable equipment
US7832456B2 (en) * 2006-04-28 2010-11-16 Halliburton Energy Services, Inc. Molds and methods of forming molds associated with manufacture of rotary drill bits and other downhole tools
US20070261890A1 (en) * 2006-05-10 2007-11-15 Smith International, Inc. Fixed Cutter Bit With Centrally Positioned Backup Cutter Elements
US7621351B2 (en) * 2006-05-15 2009-11-24 Baker Hughes Incorporated Reaming tool suitable for running on casing or liner
US7703559B2 (en) 2006-05-30 2010-04-27 Smith International, Inc. Rolling cutter
US7998573B2 (en) 2006-12-21 2011-08-16 Us Synthetic Corporation Superabrasive compact including diamond-silicon carbide composite, methods of fabrication thereof, and applications therefor
US8074869B2 (en) 2007-09-24 2011-12-13 Baker Hughes Incorporated System, method, and apparatus for reactive foil brazing of cutter components for fixed cutter bit
US9085939B2 (en) 2007-11-14 2015-07-21 Baker Hughes Incorporated Earth-boring tools attachable to a casing string and methods for their manufacture
US7905279B2 (en) 2008-04-15 2011-03-15 Baker Hughes Incorporated Combination whipstock and seal bore diverter system
US8162081B2 (en) 2008-08-28 2012-04-24 Varel International Ind., L.P. Force balanced asymmetric drilling reamer and methods for force balancing
US8047260B2 (en) * 2008-12-31 2011-11-01 Baker Hughes Incorporated Infiltration methods for forming drill bits
GB0900606D0 (en) 2009-01-15 2009-02-25 Downhole Products Plc Tubing shoe
US8590130B2 (en) * 2009-05-06 2013-11-26 Smith International, Inc. Cutting elements with re-processed thermally stable polycrystalline diamond cutting layers, bits incorporating the same, and methods of making the same
US8074749B2 (en) * 2009-09-11 2011-12-13 Weatherford/Lamb, Inc. Earth removal member with features for facilitating drill-through

Also Published As

Publication number Publication date
RU2544946C2 (en) 2015-03-20
CN102414393B (en) 2014-09-10
CN102414393A (en) 2012-04-11
EP2394016B1 (en) 2017-12-27
US8561729B2 (en) 2013-10-22
AU2010256521A1 (en) 2011-10-06
AU2010256521B2 (en) 2015-04-09
US20100307837A1 (en) 2010-12-09
CA2755564C (en) 2017-05-16
WO2010141781A1 (en) 2010-12-09
EP2394016A4 (en) 2015-11-04
SG175249A1 (en) 2011-11-28
RU2011139595A (en) 2013-04-10
EP2394016A1 (en) 2011-12-14
CA2755564A1 (en) 2010-12-09

Similar Documents

Publication Publication Date Title
SG10201404788WA (en) Casing bit and casing reamer designs
GB2473094B (en) Drilling cuttings mobilizer
PL2440354T3 (en) Drill
EP2205385A4 (en) Drill bit and reamer
EP2456310A4 (en) Substituted benzoimidazolesulfonamides and substituted indolesulfonamides as mglur4 potentiators
EP2401467A4 (en) Drill bit with adjustable cutters
EP2427625A4 (en) Slide reamer and stabilizer tool
IL201486A (en) Drill
EP2642930A4 (en) Drill bit
EP2456945A4 (en) Diamond-enhanced cutting elements, earth-boring tools employing diamond-enhanced cutting elements, and methods of making diamond-enhanced cutting elements
PL2183071T3 (en) Drill
EP2547268A4 (en) Drill bit
IL195372A0 (en) Trepanning drill
EP2561822A4 (en) Drill bit and drill equipped with same
EP2326788A4 (en) Drilling out casing bits with other casing bits
ZA201009006B (en) Drill
EP2239074A4 (en) Drill
EP2322303A4 (en) Drill
MY167142A (en) Wellbore completion system with reaming tool
EP2420115A4 (en) Back drill verification feature
SI2047932T1 (en) Drill
HUE047615T2 (en) Reamer
EP2436470A4 (en) Reamer
GB2478856B (en) Drill bit
GB0913178D0 (en) Bit biter