US1116154A - Post-hole digger. - Google Patents

Post-hole digger. Download PDF

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Publication number
US1116154A
US1116154A US75688713A US1913756887A US1116154A US 1116154 A US1116154 A US 1116154A US 75688713 A US75688713 A US 75688713A US 1913756887 A US1913756887 A US 1913756887A US 1116154 A US1116154 A US 1116154A
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United States
Prior art keywords
shaft
sleeve
bit
cutting
drill
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Expired - Lifetime
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US75688713A
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William G Stowers
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/22—Rods or pipes with helical structure

Definitions

  • My invention is an improvement in augers of the type adapted for boring in earth, and for use with post hole diggers or like machines, and has for its object to provide a simple, inexpensive and easily operated device of the character specified, wherein separable cutting mechanism is provided, capable of detachment for repairs or replacement, and wherein mechanism is provided for connection with the cutting mechanism or bit for loosening the earth as it is cut, or before it is engaged by the bit.
  • FIG. 1 is a side view of the improved auger
  • Fig. 2 is an enlarged detail of a portion of Fig. 1, with parts in section
  • Fig. 3 is a bottom plan view of the anger or drill.
  • the present embodiment of the invention comprises a shaft 1, on which is mounted a sleeve 2, the sleeve extending from near the lower end of the shaft to a point intermediate the ends thereof.
  • the sleeve is held in place by means of a bolt and nut 3, the bolt being passed transversely of the sleeve and the shaft and engaged by the nut to hold the parts in place.
  • a spiral blade or vane l is secured to the outer surface of the sleeve, the vane extending from one end of the sleeve to the other, and the spirals of the vane are well separated, as will be noticed from an inspection of Fig. 1, to prevent rocks and like hard bodies from becoming jammed between adjacent portions thereof.
  • the lower end of the shaft 1 reduced and screw threaded as indicated at 5, and a cutting bit or blade is arranged on the shaft at the lower end thereof.
  • the cutting bit or blade consists of integral portions (3 and 6, arranged at an angle with respect to each other, and a central hub 7 which fits over the lower end of the shaft as shown in Fig. 2.
  • the bore of the hub 7 is reduced at the lower end thereof, as indicated at 8 for fitting the threaded portion of the shaft, and the upper end of the hub fits against the lower end of the sleeve 2.
  • vane 4 extends below the lower end. of the sleeve 2, fitting against the peripheral surface of that portion of the hub 7, which extends above the portion (3--(5 of the bit or blade.
  • the bit or blade is held in place by a nut I 9, the nut being threaded on to the reduced portion 5 of the shaft, and the nut is provided with a conical tip or point 10. which extends below the portion (3-45" of the blade, as shown more particularly in Fig. 2..
  • the portion 66 of the blades are not in alinement but are arranged at an angle with respect to each other, and one side edge of the portion 6 is sharpened to form a cutting edge 11, and the said edge is at the lower end of the blade or vane 3.
  • the portion 6 of the blade is provided with a series of depending cutting pins 12, the series extending radially with respect to the shaft, and depending to near the lower part of the nut.
  • Any suitable mechanism may be provided for supporting, guiding and operating the improved auger or drill, and the device is especially adapted for boring post holes or other holes where an easy, quick, operating tool is required.
  • the drill In operation, the drill is supported in vertical position and is rotated to cause the bit to cut into the earth.
  • the sharpened edge 11 of the bit will cut a layer of earth at each rotation of the drill and the depending pins 12 will loosen the earth so that it may be easily separated by the cutting edge.
  • the blade or vane will lift the earth out of the hole and it will be understood that the sleeve 50 is of such length that it will lift all of the dirt from the hole to the depth required.
  • the pins 12 relieve the cutting edge from considerable strain by loosening the soil before the cutting edge engages the same.
  • the pins are of especial advantage where small rocks or pebbles are found in the soil.
  • a drill shaft a sleeve on the shaft, means for detachably connecting the sleeve to the shaft, a spiral vane on the sleeve, and a cutting bit on the shaft below the sleeve, the drill shaft having its lower end. reduced and having a threaded stem, the bit having a central hub fitting on the reduced portion, and a point for the drill threaded onto the stem and holding the bit in place, said bit having its side edge on one side of hub sharpened to form a cutting edge, and belng provided with a series of radlally spaced depending cutting pins on the other side of a .drill shaft, a sleeve on the shaft, means the hub.
  • a drill shaft a sleeve on the shaft, means for detachably connecting the sleeve to the shaft, a spiral vane on the sleeve, and a cutting bit on the shaft below the sleeve, the drill shaft having its lower end reduced and having a threaded stem, the bit having a central hub fitting on the reduced portion, and a point for the drill threaded onto'the stem and holding the bit in place.
  • a drill shaft a sleeve on the shaft, means for detachably connectingthe sleeve to the shaft, a spiral vane on the sleeve, and cutting bit on the shaft below the sleeve, said bit having its side edge on one side of the hub sharpened to form a cutting edge,
  • the sleeve for detachably connecting the sleeve to the shaft, a spiral vane on the sleeve, and a cutting bit on the shaft below the sleeve, said bit having a cutting edge at one side of the hub and a plurality of depending cutting pins at the other side.
  • a bit arranged transversely of the lower end having a cutting edge at one side of the shaft and having dependingspaced cutting pins at the other side of the shaft.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Description

W. G. STOWBRS.
POST HOLE DIGGER.
APPLICATION TILED MAR.26,1913.
1 1 1 6, 1 54, Patented Nov. 3, 1914.
W/ T/VESSES IN l/E 1V T0]? M44097 6 Gran/[R5,
d. L/" By W A TTORNEYS VH5 NORRIS PETERS 60., PHOTO-Lllfl-l. WASHINGTON. D Cv UNITED STATES PATENT OFFICE.
WILLIAM G. STOWERS, 0F BLAGKSBURG, VIRGINIA.
POST-HOLE DIGGER.
To all whom it may concern:
Be it known that I, WILLIAM G. STOW- nns, a citizen of the United States, residing at Blacksburg, in the county of Montgomeryand State of Virginia, have invented a new and useful Improvement in Post-Hole Diggers, of which the following is a specification.
My invention is an improvement in augers of the type adapted for boring in earth, and for use with post hole diggers or like machines, and has for its object to provide a simple, inexpensive and easily operated device of the character specified, wherein separable cutting mechanism is provided, capable of detachment for repairs or replacement, and wherein mechanism is provided for connection with the cutting mechanism or bit for loosening the earth as it is cut, or before it is engaged by the bit.
In the drawings :--Figure 1 is a side view of the improved auger, Fig. 2 is an enlarged detail of a portion of Fig. 1, with parts in section, and Fig. 3 is a bottom plan view of the anger or drill.
The present embodiment of the invention comprises a shaft 1, on which is mounted a sleeve 2, the sleeve extending from near the lower end of the shaft to a point intermediate the ends thereof. The sleeve is held in place by means of a bolt and nut 3, the bolt being passed transversely of the sleeve and the shaft and engaged by the nut to hold the parts in place.
A spiral blade or vane l is secured to the outer surface of the sleeve, the vane extending from one end of the sleeve to the other, and the spirals of the vane are well separated, as will be noticed from an inspection of Fig. 1, to prevent rocks and like hard bodies from becoming jammed between adjacent portions thereof.
The lower end of the shaft 1 reduced and screw threaded as indicated at 5, and a cutting bit or blade is arranged on the shaft at the lower end thereof. The cutting bit or blade consists of integral portions (3 and 6, arranged at an angle with respect to each other, and a central hub 7 which fits over the lower end of the shaft as shown in Fig. 2.
The bore of the hub 7 is reduced at the lower end thereof, as indicated at 8 for fitting the threaded portion of the shaft, and the upper end of the hub fits against the lower end of the sleeve 2. The spiral blade Specification of Letters Patent.
Application filed March 26, 1913. Serial No. 756,887.
. Patented Nov. 3, 1914.
or vane 4 extends below the lower end. of the sleeve 2, fitting against the peripheral surface of that portion of the hub 7, which extends above the portion (3--(5 of the bit or blade.
The bit or blade is held in place by a nut I 9, the nut being threaded on to the reduced portion 5 of the shaft, and the nut is provided with a conical tip or point 10. which extends below the portion (3-45" of the blade, as shown more particularly in Fig. 2.. The portion 66 of the blades are not in alinement but are arranged at an angle with respect to each other, and one side edge of the portion 6 is sharpened to form a cutting edge 11, and the said edge is at the lower end of the blade or vane 3. The portion 6 of the blade is provided with a series of depending cutting pins 12, the series extending radially with respect to the shaft, and depending to near the lower part of the nut.
Any suitable mechanism may be provided for supporting, guiding and operating the improved auger or drill, and the device is especially adapted for boring post holes or other holes where an easy, quick, operating tool is required.
In operation, the drill is supported in vertical position and is rotated to cause the bit to cut into the earth. The sharpened edge 11 of the bit will cut a layer of earth at each rotation of the drill and the depending pins 12 will loosen the earth so that it may be easily separated by the cutting edge. The blade or vane will lift the earth out of the hole and it will be understood that the sleeve 50 is of such length that it will lift all of the dirt from the hole to the depth required. The pins 12 relieve the cutting edge from considerable strain by loosening the soil before the cutting edge engages the same. The pins are of especial advantage where small rocks or pebbles are found in the soil.
I claim:
1. In a device of the character specified, a drill shaft, a sleeve on the shaft, means for detachably connecting the sleeve to the shaft, a spiral vane on the sleeve, and a cutting bit on the shaft below the sleeve, the drill shaft having its lower end. reduced and having a threaded stem, the bit having a central hub fitting on the reduced portion, and a point for the drill threaded onto the stem and holding the bit in place, said bit having its side edge on one side of hub sharpened to form a cutting edge, and belng provided with a series of radlally spaced depending cutting pins on the other side of a .drill shaft, a sleeve on the shaft, means the hub.
2. In a device of the character specified, a drill shaft, a sleeve on the shaft, means for detachably connecting the sleeve to the shaft, a spiral vane on the sleeve, and a cutting bit on the shaft below the sleeve, the drill shaft having its lower end reduced and having a threaded stem, the bit having a central hub fitting on the reduced portion, and a point for the drill threaded onto'the stem and holding the bit in place.
'8. In a device ofthe character specified, a drill shaft, a sleeve on the shaft, means for detachably connectingthe sleeve to the shaft, a spiral vane on the sleeve, and cutting bit on the shaft below the sleeve, said bit having its side edge on one side of the hub sharpened to form a cutting edge,
and being provided with a series of radially spaced depending cutting pins onthe other side of the hub.
4:. In a device of the character specified,
for detachably connecting the sleeve to the shaft, a spiral vane on the sleeve, and a cutting bit on the shaft below the sleeve, said bit having a cutting edge at one side of the hub and a plurality of depending cutting pins at the other side.
5. In combination with the drill shaft and the spiral vane, a bit arranged transversely of the lower end having a cutting edge at one side of the shaft and having dependingspaced cutting pins at the other side of the shaft.
WVILLIAM Gr. STOWERS.
\Vitnesses v I H. GUDHEIM, ALEX. BLACK.
Copies of this patent may be'obtained for five cents each,
by addressing the Commissioner of Patents,
Washingtom-D. G.
of the drill shaft, said bit
US75688713A 1913-03-26 1913-03-26 Post-hole digger. Expired - Lifetime US1116154A (en)

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Cited By (81)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2591233A (en) * 1947-01-21 1952-04-01 Kenneth J Browne Earth auger
US4074780A (en) * 1976-07-28 1978-02-21 Gilbert Robert E Earth auger
DE2709030A1 (en) * 1977-03-02 1978-09-07 Leffer Stahl & App ROTARY DRILL BIT FOR EARTH AND ROCK INFORMATION
US4750572A (en) * 1985-05-15 1988-06-14 Hawera Probst Gmbh & Co. Drilling tool with an interchangeable conveying spiral
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
US20070114067A1 (en) * 2005-11-21 2007-05-24 Hall David R Drill Bit Assembly with an Indenting Member
US20070114062A1 (en) * 2005-11-21 2007-05-24 Hall David R Drill Bit Assembly with a Logging Device
US20070114066A1 (en) * 2005-11-21 2007-05-24 Hall David R A Drill Bit Assembly Adapted to Provide Power Downhole
US20070125580A1 (en) * 2005-11-21 2007-06-07 Hall David R Jet Arrangement for a Downhole Drill Bit
US20070221406A1 (en) * 2006-03-24 2007-09-27 Hall David R Jack Element for a Drill Bit
US20070221412A1 (en) * 2005-11-21 2007-09-27 Hall David R Rotary Valve for a Jack Hammer
US20070229304A1 (en) * 2006-03-23 2007-10-04 Hall David R Drill Bit with an Electrically Isolated Transmitter
US20070272443A1 (en) * 2005-11-21 2007-11-29 Hall David R Downhole Steering
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
US20080173482A1 (en) * 2005-11-21 2008-07-24 Hall David R Drill Bit
US7419016B2 (en) 2006-03-23 2008-09-02 Hall David R Bi-center drill bit
US7419018B2 (en) 2006-11-01 2008-09-02 Hall David R Cam assembly in a downhole component
US20080296015A1 (en) * 2007-06-04 2008-12-04 Hall David R Clutch for a Jack Element
US20080302572A1 (en) * 2005-11-21 2008-12-11 Hall David R Drill Bit Porting System
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
US20090158897A1 (en) * 2005-11-21 2009-06-25 Hall David R Jack Element with a Stop-off
US20090183919A1 (en) * 2005-11-21 2009-07-23 Hall David R Downhole Percussive Tool with Alternating Pressure Differentials
US20090183920A1 (en) * 2006-03-23 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
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
US7762353B2 (en) 2006-03-23 2010-07-27 Schlumberger Technology Corporation Downhole valve mechanism
USD620510S1 (en) 2006-03-23 2010-07-27 Schlumberger Technology Corporation Drill bit
US20100264721A1 (en) * 2009-04-16 2010-10-21 Hall David R Seal with Rigid Element for Degradation Assembly
US20100326740A1 (en) * 2009-06-26 2010-12-30 Hall David R Bonded Assembly Having Low Residual Stress
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
US20110180324A1 (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
US8297378B2 (en) 2005-11-21 2012-10-30 Schlumberger Technology Corporation Turbine driven hammer that oscillates at a constant frequency
US8297375B2 (en) 2005-11-21 2012-10-30 Schlumberger Technology Corporation Downhole turbine
US8316964B2 (en) 2006-03-23 2012-11-27 Schlumberger Technology Corporation Drill bit transducer device
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
US8342611B2 (en) 2007-05-15 2013-01-01 Schlumberger Technology Corporation Spring loaded pick
US8342266B2 (en) 2011-03-15 2013-01-01 Hall David R Timed steering nozzle on a downhole drill bit
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
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
US20140116790A1 (en) * 2006-08-11 2014-05-01 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
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
US9915102B2 (en) 2006-08-11 2018-03-13 Schlumberger Technology Corporation Pointed working ends on a bit
US10029391B2 (en) 2006-10-26 2018-07-24 Schlumberger Technology Corporation High impact resistant tool with an apex width between a first and second transitions
USD982991S1 (en) * 2022-08-30 2023-04-11 Haiying Lou Ice auger

Cited By (120)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2591233A (en) * 1947-01-21 1952-04-01 Kenneth J Browne Earth auger
US4074780A (en) * 1976-07-28 1978-02-21 Gilbert Robert E Earth auger
DE2709030A1 (en) * 1977-03-02 1978-09-07 Leffer Stahl & App ROTARY DRILL BIT FOR EARTH AND ROCK INFORMATION
US4750572A (en) * 1985-05-15 1988-06-14 Hawera Probst Gmbh & Co. Drilling tool with an interchangeable conveying spiral
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
US7424922B2 (en) 2005-11-21 2008-09-16 Hall David R Rotary valve for a jack hammer
US8528664B2 (en) 2005-11-21 2013-09-10 Schlumberger Technology Corporation Downhole mechanism
US20070114067A1 (en) * 2005-11-21 2007-05-24 Hall David R Drill Bit Assembly with an Indenting Member
US20070114062A1 (en) * 2005-11-21 2007-05-24 Hall David R Drill Bit Assembly with a Logging Device
US20070114061A1 (en) * 2005-11-21 2007-05-24 Hall David R Drill Bit Assembly with a Probe
US20070114066A1 (en) * 2005-11-21 2007-05-24 Hall David R A Drill Bit Assembly Adapted to Provide Power Downhole
US7497279B2 (en) 2005-11-21 2009-03-03 Hall David R Jack element adapted to rotate independent of a drill bit
US7225886B1 (en) 2005-11-21 2007-06-05 Hall David R Drill bit assembly with an indenting member
US20070125580A1 (en) * 2005-11-21 2007-06-07 Hall David R Jet Arrangement for a Downhole Drill Bit
US7258179B2 (en) 2005-11-21 2007-08-21 Hall David R Rotary bit with an indenting member
US7270196B2 (en) 2005-11-21 2007-09-18 Hall David R Drill bit assembly
US8020471B2 (en) 2005-11-21 2011-09-20 Schlumberger Technology Corporation Method for manufacturing a drill bit
US20070221412A1 (en) * 2005-11-21 2007-09-27 Hall David R Rotary Valve for a Jack Hammer
US7967082B2 (en) 2005-11-21 2011-06-28 Schlumberger Technology Corporation Downhole mechanism
US20070272443A1 (en) * 2005-11-21 2007-11-29 Hall David R Downhole Steering
US8205688B2 (en) 2005-11-21 2012-06-26 Hall David R Lead the bit rotary steerable system
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
US8950517B2 (en) 2005-11-21 2015-02-10 Schlumberger Technology Corporation Drill bit with a retained jack element
US8408336B2 (en) 2005-11-21 2013-04-02 Schlumberger Technology Corporation Flow guide actuation
US7398837B2 (en) 2005-11-21 2008-07-15 Hall David R Drill bit assembly with a logging device
US20080173482A1 (en) * 2005-11-21 2008-07-24 Hall David R Drill Bit
US20110048811A1 (en) * 2005-11-21 2011-03-03 Schlumberger Technology Corporation Drill bit with a retained jack element
US8522897B2 (en) 2005-11-21 2013-09-03 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US8225883B2 (en) 2005-11-21 2012-07-24 Schlumberger Technology Corporation Downhole percussive tool with alternating pressure differentials
US7426968B2 (en) 2005-11-21 2008-09-23 Hall David R Drill bit assembly with a probe
US7198119B1 (en) 2005-11-21 2007-04-03 Hall David R Hydraulic drill bit assembly
US20080302572A1 (en) * 2005-11-21 2008-12-11 Hall David R Drill Bit Porting System
US8267196B2 (en) 2005-11-21 2012-09-18 Schlumberger Technology Corporation Flow guide actuation
US20070114071A1 (en) * 2005-11-21 2007-05-24 Hall David R Rotary Bit with an Indenting Member
US20070114065A1 (en) * 2005-11-21 2007-05-24 Hall David R Drill Bit Assembly
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
US20090183919A1 (en) * 2005-11-21 2009-07-23 Hall David R Downhole Percussive Tool with Alternating Pressure Differentials
US8281882B2 (en) 2005-11-21 2012-10-09 Schlumberger Technology Corporation Jack element for a drill bit
US8297378B2 (en) 2005-11-21 2012-10-30 Schlumberger Technology Corporation Turbine driven hammer that oscillates at a constant frequency
US7591327B2 (en) 2005-11-21 2009-09-22 Hall David R Drilling at a resonant frequency
US8297375B2 (en) 2005-11-21 2012-10-30 Schlumberger Technology Corporation Downhole turbine
US7617886B2 (en) 2005-11-21 2009-11-17 Hall David R Fluid-actuated hammer bit
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US8550190B2 (en) 2010-04-01 2013-10-08 David R. Hall Inner bit disposed within an outer bit
US9677343B2 (en) 2010-04-23 2017-06-13 Schlumberger Technology Corporation Tracking shearing cutters on a fixed bladed drill bit with pointed cutting elements
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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
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USD982991S1 (en) * 2022-08-30 2023-04-11 Haiying Lou Ice auger

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