US616118A - Ernest kuhne - Google Patents

Ernest kuhne Download PDF

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Publication number
US616118A
US616118A US616118DA US616118A US 616118 A US616118 A US 616118A US 616118D A US616118D A US 616118DA US 616118 A US616118 A US 616118A
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drill
head
cutters
tube
fig
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    • 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
    • E21B10/00Drill bits

Description

. Patented Dec. 20,1898. E. KUHNE. v

DRILL (Application filed Mar. 22, 1898.)

(No Model.)

M'Zrzesses UNITED STATES PATENT OFFICE.

ERNEST KUHNE, OF NEl/V YORK, N. Y.

DRILL.

SPECIFICATION forming part of Letters Patent No. 616,118, dated December 20, 1898.

Application filed March 22, 1898- To 00 whom it may concern.-

Be it known that I, ERNEST KUHNE, acitizen of the United States, residing at New York city, county and State of New York, have invented new and useful Improvements in Drills,of which the followingis a specification.

This invention relates to a drill more particularly designed for boring or drilling into the soil for the removal of earths and minerals.

The drill is composed of a spiral drill-head of peculiar construction, which is securely fitted into the drill-tube and discharges the borings directly into such tube by means of grooves formed between the cutting-blades. To prevent the drill-head from Working loose under lateral strain, the tube terminates in a serrated lower edge which is engaged by the upper inclined edges of the cutters on the drill-head.

In the accompanying drawings, Figure 1 is a side elevation of my improved drill; Fig. 2, a perspective view of the lower end of the drill-tube; Fig. 3, a side View of the drill-head; Fig. 4, a top view thereof; Fig. 5, a section on line 5 5, Fig. 3; Fig. 6, a longitudinal section of the lower end of the drill-tube, showing the head inserted; and Fig. 7, a cross-section on line 7 7, Fig. 1.

The letter a represents the drill -head, which is preferably composed of tempered cast-steel and is of conical shape. Within the surface of the head are formed a number of spiral grooves a, that extend to and open at the top of the head and gradually increase in Width from the drill-point upwardly. The spiral cutters a between the grooves a, are backed off, so that a bit is formed along one of their edges. At its upper end each cutter a terminates in an inclined edge a", and above such edge the cutters are reduced in diameter and made concentric to form the ribs a These ribs are telescoped by the boring-tube Serial No. 674,779. (N0 model.)

b and are attached thereto by screws 0 or other wise.

The bottom of the tube 1) is serrated, as at Z), the serrations extending in a direction opposite to that of the cutters a These serrations are engaged by the inclined upper edges a of the cutters a and in this way the transverse strain to which the cutter-head is subjected will not be apt to wrench the head off its fastening, because such strain will force the upper edges of the cutters a against the serrations b. I

The grooves a extend to the upper end of the ribs a Fig. 6, and will consequently form ducts in the overlapped portion of the head that convey the borings directly into the in terior of the tube 19.

The tube 1) is provided with a suitable discharge-orifice b and carries on its top a cap 1, adapted to be coupled to a boring-rod, by means of which a rotating motion may be im= parted to the drill in suitable manner.

What I claim is- 1. A drill composed of a conical head hav ing backed-off spiral cutters, concentric ribs above the cutters, and upwardly-opening spiral surface grooves, combined with a tube that overlaps the ribs and into which the upper ends of the surface grooves open, substantially as specified.

2. A drill composed of a conical head hav ing spiral cutters with aninclined upper edge, concentric ribs above the cutters, and upwardly-opening spiral surface grooves, com bined with a tube having a lower serrated edge which engages the inclined upper edge of the cutters and telescopes the ribs, substan tially as specified.

ERNEST KUHNE.

Witnesses:

GEORGE FREDERICK OoRrs, JosEPE WILLIAM KENNY.

US616118A Ernest kuhne Expired - Lifetime US616118A (en)

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Cited By (80)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2965144A (en) * 1957-10-29 1960-12-20 Robert B Loewenthal Tapered router bit and method
US3871488A (en) * 1974-02-13 1975-03-18 Daniel R Sabre Rock drilling
US20040084221A1 (en) * 2000-11-22 2004-05-06 Luth Ute Petra Drilling head
US7198119B1 (en) 2005-11-21 2007-04-03 Hall David R Hydraulic drill bit assembly
US20070114062A1 (en) * 2005-11-21 2007-05-24 Hall David R Drill Bit Assembly with a Logging Device
US20070114067A1 (en) * 2005-11-21 2007-05-24 Hall David R Drill Bit Assembly with an Indenting Member
US20070114066A1 (en) * 2005-11-21 2007-05-24 Hall David R A Drill Bit Assembly Adapted to Provide Power Downhole
US20070221406A1 (en) * 2006-03-24 2007-09-27 Hall David R Jack Element for a Drill Bit
US20070229304A1 (en) * 2006-03-23 2007-10-04 Hall David R Drill Bit with an Electrically Isolated Transmitter
US20080029312A1 (en) * 2006-03-23 2008-02-07 Hall David R Indenting Member for a Drill Bit
US20080087473A1 (en) * 2006-10-13 2008-04-17 Hall David R Percussive Drill Bit
US7392857B1 (en) 2007-01-03 2008-07-01 Hall David R Apparatus and method for vibrating a drill bit
US7419018B2 (en) 2006-11-01 2008-09-02 Hall David R Cam assembly in a downhole component
US7419016B2 (en) 2006-03-23 2008-09-02 Hall David R Bi-center drill bit
US7424922B2 (en) 2005-11-21 2008-09-16 Hall David R Rotary valve for a jack hammer
US20080296015A1 (en) * 2007-06-04 2008-12-04 Hall David R Clutch for a Jack Element
US7484576B2 (en) 2006-03-23 2009-02-03 Hall David R Jack element in communication with an electric motor and or generator
US7497279B2 (en) 2005-11-21 2009-03-03 Hall David R Jack element adapted to rotate independent of a drill bit
US7533737B2 (en) 2005-11-21 2009-05-19 Hall David R Jet arrangement for a downhole drill bit
US20090158897A1 (en) * 2005-11-21 2009-06-25 Hall David R Jack Element with a Stop-off
US7559379B2 (en) 2005-11-21 2009-07-14 Hall David R Downhole steering
US20090183920A1 (en) * 2006-03-23 2009-07-23 Hall David R Downhole Percussive Tool with Alternating Pressure Differentials
US20090183919A1 (en) * 2005-11-21 2009-07-23 Hall David R Downhole Percussive Tool with Alternating Pressure Differentials
US7591327B2 (en) 2005-11-21 2009-09-22 Hall David R Drilling at a resonant frequency
US7600586B2 (en) 2006-12-15 2009-10-13 Hall David R System for steering a drill string
US7617886B2 (en) 2005-11-21 2009-11-17 Hall David R Fluid-actuated hammer bit
US7641002B2 (en) 2005-11-21 2010-01-05 Hall David R Drill bit
US20100059289A1 (en) * 2006-08-11 2010-03-11 Hall David R Cutting Element with Low Metal Concentration
US20100089648A1 (en) * 2006-08-11 2010-04-15 Hall David R Fixed Bladed Bit that Shifts Weight between an Indenter and Cutting Elements
US7721826B2 (en) 2007-09-06 2010-05-25 Schlumberger Technology Corporation Downhole jack assembly sensor
USD620510S1 (en) 2006-03-23 2010-07-27 Schlumberger Technology Corporation Drill bit
US7762353B2 (en) 2006-03-23 2010-07-27 Schlumberger Technology Corporation Downhole valve mechanism
US20100326740A1 (en) * 2009-06-26 2010-12-30 Hall David R Bonded Assembly Having Low Residual Stress
US20100326400A1 (en) * 2009-06-30 2010-12-30 Hayes Diversified Technologies, Inc. High Efficiency Pre-Chamber Internal Combustion Engines and Methods Thereof
US20110048811A1 (en) * 2005-11-21 2011-03-03 Schlumberger Technology Corporation Drill bit with a retained jack element
US7900720B2 (en) 2006-01-18 2011-03-08 Schlumberger Technology Corporation Downhole drive shaft connection
US7954401B2 (en) 2006-10-27 2011-06-07 Schlumberger Technology Corporation Method of assembling a drill bit with a jack element
US7967083B2 (en) 2007-09-06 2011-06-28 Schlumberger Technology Corporation Sensor for determining a position of a jack element
US7967082B2 (en) 2005-11-21 2011-06-28 Schlumberger Technology Corporation Downhole mechanism
US20110180324A1 (en) * 2006-08-11 2011-07-28 Hall David R Sensor on a Formation Engaging Member of a Drill Bit
US20110180325A1 (en) * 2006-08-11 2011-07-28 Hall David R Sensor on a Formation Engaging Member of a Drill Bit
US8011457B2 (en) 2006-03-23 2011-09-06 Schlumberger Technology Corporation Downhole hammer assembly
US8122980B2 (en) 2007-06-22 2012-02-28 Schlumberger Technology Corporation Rotary drag bit with pointed cutting elements
US8201892B2 (en) 2006-08-11 2012-06-19 Hall David R Holder assembly
US8205688B2 (en) 2005-11-21 2012-06-26 Hall David R Lead the bit rotary steerable system
US8215420B2 (en) 2006-08-11 2012-07-10 Schlumberger Technology Corporation Thermally stable pointed diamond with increased impact resistance
US8240404B2 (en) 2006-08-11 2012-08-14 Hall David R Roof bolt bit
US8267196B2 (en) 2005-11-21 2012-09-18 Schlumberger Technology Corporation Flow guide actuation
US8292372B2 (en) 2007-12-21 2012-10-23 Hall David R Retention for holder shank
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US8316964B2 (en) 2006-03-23 2012-11-27 Schlumberger Technology Corporation Drill bit transducer device
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US8333254B2 (en) 2010-10-01 2012-12-18 Hall David R Steering mechanism with a ring disposed about an outer diameter of a drill bit and method for drilling
US8342266B2 (en) 2011-03-15 2013-01-01 Hall David R Timed steering nozzle on a downhole drill bit
US8342611B2 (en) 2007-05-15 2013-01-01 Schlumberger Technology Corporation Spring loaded pick
USD674422S1 (en) 2007-02-12 2013-01-15 Hall David R Drill bit with a pointed cutting element and a shearing cutting element
US8360174B2 (en) 2006-03-23 2013-01-29 Schlumberger Technology Corporation Lead the bit rotary steerable tool
USD678368S1 (en) 2007-02-12 2013-03-19 David R. Hall Drill bit with a pointed cutting element
US8408336B2 (en) 2005-11-21 2013-04-02 Schlumberger Technology Corporation Flow guide actuation
US8418784B2 (en) 2010-05-11 2013-04-16 David R. Hall Central cutting region of a drilling head assembly
US8434573B2 (en) 2006-08-11 2013-05-07 Schlumberger Technology Corporation Degradation assembly
US8449040B2 (en) 2006-08-11 2013-05-28 David R. Hall Shank for an attack tool
US8522897B2 (en) 2005-11-21 2013-09-03 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US8528664B2 (en) 2005-11-21 2013-09-10 Schlumberger Technology Corporation Downhole mechanism
US8540037B2 (en) 2008-04-30 2013-09-24 Schlumberger Technology Corporation Layered polycrystalline diamond
US8550190B2 (en) 2010-04-01 2013-10-08 David R. Hall Inner bit disposed within an outer bit
US8567532B2 (en) 2006-08-11 2013-10-29 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US8573331B2 (en) 2006-08-11 2013-11-05 David R. Hall Roof mining drill bit
US8590644B2 (en) 2006-08-11 2013-11-26 Schlumberger Technology Corporation Downhole drill bit
US8622155B2 (en) 2006-08-11 2014-01-07 Schlumberger Technology Corporation Pointed diamond working ends on a shear bit
US8701799B2 (en) 2009-04-29 2014-04-22 Schlumberger Technology Corporation Drill bit cutter pocket restitution
US8714285B2 (en) 2006-08-11 2014-05-06 Schlumberger Technology Corporation Method for drilling with a fixed bladed bit
US8820440B2 (en) 2010-10-01 2014-09-02 David R. Hall Drill bit steering assembly
US8839888B2 (en) 2010-04-23 2014-09-23 Schlumberger Technology Corporation Tracking shearing cutters on a fixed bladed drill bit with pointed cutting elements
US9051795B2 (en) 2006-08-11 2015-06-09 Schlumberger Technology Corporation Downhole drill bit
US9068410B2 (en) 2006-10-26 2015-06-30 Schlumberger Technology Corporation Dense diamond body
US9316061B2 (en) 2006-08-11 2016-04-19 David R. Hall High impact resistant degradation element
US9366089B2 (en) 2006-08-11 2016-06-14 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US9915102B2 (en) 2006-08-11 2018-03-13 Schlumberger Technology Corporation Pointed working ends on a bit

Cited By (109)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2965144A (en) * 1957-10-29 1960-12-20 Robert B Loewenthal Tapered router bit and method
US3871488A (en) * 1974-02-13 1975-03-18 Daniel R Sabre Rock drilling
US20040084221A1 (en) * 2000-11-22 2004-05-06 Luth Ute Petra Drilling head
US6932170B2 (en) * 2000-11-22 2005-08-23 Ute Petra Luth Drilling head
US7641002B2 (en) 2005-11-21 2010-01-05 Hall David R Drill bit
US20070114062A1 (en) * 2005-11-21 2007-05-24 Hall David R Drill Bit Assembly with a Logging Device
US20070114067A1 (en) * 2005-11-21 2007-05-24 Hall David R Drill Bit Assembly with an Indenting Member
US20070114071A1 (en) * 2005-11-21 2007-05-24 Hall David R Rotary Bit with an Indenting Member
US20070114066A1 (en) * 2005-11-21 2007-05-24 Hall David R A Drill Bit Assembly Adapted to Provide Power Downhole
US20070114061A1 (en) * 2005-11-21 2007-05-24 Hall David R Drill Bit Assembly with a Probe
US20070114065A1 (en) * 2005-11-21 2007-05-24 Hall David R Drill Bit Assembly
US7225886B1 (en) 2005-11-21 2007-06-05 Hall David R Drill bit assembly with an indenting member
US7258179B2 (en) 2005-11-21 2007-08-21 Hall David R Rotary bit with an indenting member
US7198119B1 (en) 2005-11-21 2007-04-03 Hall David R Hydraulic drill bit assembly
US8950517B2 (en) 2005-11-21 2015-02-10 Schlumberger Technology Corporation Drill bit with a retained jack element
US8528664B2 (en) 2005-11-21 2013-09-10 Schlumberger Technology Corporation Downhole mechanism
US8522897B2 (en) 2005-11-21 2013-09-03 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US7328755B2 (en) 2005-11-21 2008-02-12 Hall David R Hydraulic drill bit assembly
US7337858B2 (en) 2005-11-21 2008-03-04 Hall David R Drill bit assembly adapted to provide power downhole
US8408336B2 (en) 2005-11-21 2013-04-02 Schlumberger Technology Corporation Flow guide actuation
US8297378B2 (en) 2005-11-21 2012-10-30 Schlumberger Technology Corporation Turbine driven hammer that oscillates at a constant frequency
US7398837B2 (en) 2005-11-21 2008-07-15 Hall David R Drill bit assembly with a logging device
US8297375B2 (en) 2005-11-21 2012-10-30 Schlumberger Technology Corporation Downhole turbine
US8281882B2 (en) 2005-11-21 2012-10-09 Schlumberger Technology Corporation Jack element for a drill bit
US7424922B2 (en) 2005-11-21 2008-09-16 Hall David R Rotary valve for a jack hammer
US7426968B2 (en) 2005-11-21 2008-09-23 Hall David R Drill bit assembly with a probe
US8225883B2 (en) 2005-11-21 2012-07-24 Schlumberger Technology Corporation Downhole percussive tool with alternating pressure differentials
US8205688B2 (en) 2005-11-21 2012-06-26 Hall David R Lead the bit rotary steerable system
US7497279B2 (en) 2005-11-21 2009-03-03 Hall David R Jack element adapted to rotate independent of a drill bit
US8020471B2 (en) 2005-11-21 2011-09-20 Schlumberger Technology Corporation Method for manufacturing a drill bit
US7533737B2 (en) 2005-11-21 2009-05-19 Hall David R Jet arrangement for a downhole drill bit
US20090158897A1 (en) * 2005-11-21 2009-06-25 Hall David R Jack Element with a Stop-off
US7559379B2 (en) 2005-11-21 2009-07-14 Hall David R Downhole steering
US8267196B2 (en) 2005-11-21 2012-09-18 Schlumberger Technology Corporation Flow guide actuation
US20090183919A1 (en) * 2005-11-21 2009-07-23 Hall David R Downhole Percussive Tool with Alternating Pressure Differentials
US20110048811A1 (en) * 2005-11-21 2011-03-03 Schlumberger Technology Corporation Drill bit with a retained jack element
US7591327B2 (en) 2005-11-21 2009-09-22 Hall David R Drilling at a resonant frequency
US7967082B2 (en) 2005-11-21 2011-06-28 Schlumberger Technology Corporation Downhole mechanism
US7617886B2 (en) 2005-11-21 2009-11-17 Hall David R Fluid-actuated hammer bit
US7270196B2 (en) 2005-11-21 2007-09-18 Hall David R Drill bit assembly
US7900720B2 (en) 2006-01-18 2011-03-08 Schlumberger Technology Corporation Downhole drive shaft connection
US8011457B2 (en) 2006-03-23 2011-09-06 Schlumberger Technology Corporation Downhole hammer assembly
US7694756B2 (en) 2006-03-23 2010-04-13 Hall David R Indenting member for a drill bit
US20080029312A1 (en) * 2006-03-23 2008-02-07 Hall David R Indenting Member for a Drill Bit
US20070229304A1 (en) * 2006-03-23 2007-10-04 Hall David R Drill Bit with an Electrically Isolated Transmitter
USD620510S1 (en) 2006-03-23 2010-07-27 Schlumberger Technology Corporation Drill bit
US7762353B2 (en) 2006-03-23 2010-07-27 Schlumberger Technology Corporation Downhole valve mechanism
US7419016B2 (en) 2006-03-23 2008-09-02 Hall David R Bi-center drill bit
US7661487B2 (en) 2006-03-23 2010-02-16 Hall David R Downhole percussive tool with alternating pressure differentials
US7484576B2 (en) 2006-03-23 2009-02-03 Hall David R Jack element in communication with an electric motor and or generator
US20090183920A1 (en) * 2006-03-23 2009-07-23 Hall David R Downhole Percussive Tool with Alternating Pressure Differentials
US8316964B2 (en) 2006-03-23 2012-11-27 Schlumberger Technology Corporation Drill bit transducer device
US8130117B2 (en) 2006-03-23 2012-03-06 Schlumberger Technology Corporation Drill bit with an electrically isolated transmitter
US8360174B2 (en) 2006-03-23 2013-01-29 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US20070221406A1 (en) * 2006-03-24 2007-09-27 Hall David R Jack Element for a Drill Bit
US7571780B2 (en) 2006-03-24 2009-08-11 Hall David R Jack element for a drill bit
US8622155B2 (en) 2006-08-11 2014-01-07 Schlumberger Technology Corporation Pointed diamond working ends on a shear bit
US8714285B2 (en) 2006-08-11 2014-05-06 Schlumberger Technology Corporation Method for drilling with a fixed bladed bit
US20110180324A1 (en) * 2006-08-11 2011-07-28 Hall David R Sensor on a Formation Engaging Member of a Drill Bit
US8616305B2 (en) 2006-08-11 2013-12-31 Schlumberger Technology Corporation Fixed bladed bit that shifts weight between an indenter and cutting elements
US9915102B2 (en) 2006-08-11 2018-03-13 Schlumberger Technology Corporation Pointed working ends on a bit
US8191651B2 (en) 2006-08-11 2012-06-05 Hall David R Sensor on a formation engaging member of a drill bit
US8201892B2 (en) 2006-08-11 2012-06-19 Hall David R Holder assembly
US9051795B2 (en) 2006-08-11 2015-06-09 Schlumberger Technology Corporation Downhole drill bit
US8215420B2 (en) 2006-08-11 2012-07-10 Schlumberger Technology Corporation Thermally stable pointed diamond with increased impact resistance
US8596381B2 (en) 2006-08-11 2013-12-03 David R. Hall Sensor on a formation engaging member of a drill bit
US8240404B2 (en) 2006-08-11 2012-08-14 Hall David R Roof bolt bit
US20100059289A1 (en) * 2006-08-11 2010-03-11 Hall David R Cutting Element with Low Metal Concentration
US9316061B2 (en) 2006-08-11 2016-04-19 David R. Hall High impact resistant degradation element
US8573331B2 (en) 2006-08-11 2013-11-05 David R. Hall Roof mining drill bit
US8567532B2 (en) 2006-08-11 2013-10-29 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US9366089B2 (en) 2006-08-11 2016-06-14 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US20100089648A1 (en) * 2006-08-11 2010-04-15 Hall David R Fixed Bladed Bit that Shifts Weight between an Indenter and Cutting Elements
US9708856B2 (en) 2006-08-11 2017-07-18 Smith International, Inc. Downhole drill bit
US20110180325A1 (en) * 2006-08-11 2011-07-28 Hall David R Sensor on a Formation Engaging Member of a Drill Bit
US8449040B2 (en) 2006-08-11 2013-05-28 David R. Hall Shank for an attack tool
US8434573B2 (en) 2006-08-11 2013-05-07 Schlumberger Technology Corporation Degradation assembly
US8590644B2 (en) 2006-08-11 2013-11-26 Schlumberger Technology Corporation Downhole drill bit
US20080087473A1 (en) * 2006-10-13 2008-04-17 Hall David R Percussive Drill Bit
US7527110B2 (en) 2006-10-13 2009-05-05 Hall David R Percussive drill bit
US9068410B2 (en) 2006-10-26 2015-06-30 Schlumberger Technology Corporation Dense diamond body
US7954401B2 (en) 2006-10-27 2011-06-07 Schlumberger Technology Corporation Method of assembling a drill bit with a jack element
US7419018B2 (en) 2006-11-01 2008-09-02 Hall David R Cam assembly in a downhole component
US7600586B2 (en) 2006-12-15 2009-10-13 Hall David R System for steering a drill string
US7392857B1 (en) 2007-01-03 2008-07-01 Hall David R Apparatus and method for vibrating a drill bit
USD678368S1 (en) 2007-02-12 2013-03-19 David R. Hall Drill bit with a pointed cutting element
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US8307919B2 (en) 2007-06-04 2012-11-13 Schlumberger Technology Corporation Clutch for a jack element
US20080296015A1 (en) * 2007-06-04 2008-12-04 Hall David R Clutch for a Jack Element
US8122980B2 (en) 2007-06-22 2012-02-28 Schlumberger Technology Corporation Rotary drag bit with pointed cutting elements
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US8540037B2 (en) 2008-04-30 2013-09-24 Schlumberger Technology Corporation Layered polycrystalline diamond
US8931854B2 (en) 2008-04-30 2015-01-13 Schlumberger Technology Corporation Layered polycrystalline diamond
US8322796B2 (en) 2009-04-16 2012-12-04 Schlumberger Technology Corporation Seal with contact element for pick shield
US8701799B2 (en) 2009-04-29 2014-04-22 Schlumberger Technology Corporation Drill bit cutter pocket restitution
US20100326740A1 (en) * 2009-06-26 2010-12-30 Hall David R Bonded Assembly Having Low Residual Stress
US20100326400A1 (en) * 2009-06-30 2010-12-30 Hayes Diversified Technologies, Inc. High Efficiency Pre-Chamber Internal Combustion Engines and Methods Thereof
US8550190B2 (en) 2010-04-01 2013-10-08 David R. Hall Inner bit disposed within an outer bit
US8839888B2 (en) 2010-04-23 2014-09-23 Schlumberger Technology Corporation Tracking shearing cutters on a fixed bladed drill bit with pointed cutting elements
US9677343B2 (en) 2010-04-23 2017-06-13 Schlumberger Technology Corporation Tracking shearing cutters on a fixed bladed drill bit with pointed cutting elements
US8418784B2 (en) 2010-05-11 2013-04-16 David R. Hall Central cutting region of a drilling head assembly
US8820440B2 (en) 2010-10-01 2014-09-02 David R. Hall Drill bit steering assembly
US8333254B2 (en) 2010-10-01 2012-12-18 Hall David R Steering mechanism with a ring disposed about an outer diameter of a drill bit and method for drilling
US8342266B2 (en) 2011-03-15 2013-01-01 Hall David R Timed steering nozzle on a downhole drill bit

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