With Below-ground Conveyer Or Impeller For Removal Of Cuttings Patents (Class 175/102)
  • Publication number: 20150136492
    Abstract: A ground drill system (10) has a drill string 14 which forms first and second mutually isolated fluid paths (16 and 18) respectively. The drill string (14) has an up hole end (20) coupled to a dual circulation rotation head (22) and a down hole end (24) which is coupled to a drilling tool (12). The drilling tool (12) is operated by the flow of fluid delivered through the first flow path (16). A second fluid outlet (26) is provided intermediate the up hole end (20) and the drilling tool (12). The outlet (26) is in fluid communication with the second fluid flow path (18) and located a constant or fixed distance from the drilling toll (2). The second fluid outlet (26) discharges a flushing fluid flowing through the flushing flow path (18) into a hole being drilled by the drilling system (10). The rotation head (22) provides torque to the drill string (14) and thus the drilling tool (12).
    Type: Application
    Filed: January 21, 2013
    Publication date: May 21, 2015
    Inventors: Ian Speer, Warren Strange
  • Patent number: 8800654
    Abstract: A wellbore machining device is proposed for machining a tubular component of a wellbore. The device includes a control unit at the surface level of the wellbore and a down-hole tool unit connected to the control unit through a wire line. The tool unit includes an elongated guide member, a tool member movably supported on the guide member with respect to at least three axes of motion and a plurality of actuators controlled by the control unit and adapted to move the tool member with respect to the axes of motion. The tool unit further includes two anchor members each mounted to an axial end of the guide member and adapted to releasably clamp the tool unit to the tubular component. The control unit and the tool unit form a computer numerical control device (CNC device) wherein the actuators are electric servo motors controlling an actual position of the tool member with respect to a path and/or a sequence of desired position defined by the control unit.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: August 12, 2014
    Assignee: Statoil Petroleum AS
    Inventor: Steinar Wasa Tverlid
  • Patent number: 8783359
    Abstract: An apparatus, system and method is disclosed for processing geological solids or wellbore cuttings generated by excavation or drilling under a body of water. An apparatus for processing solids in association with a riser may employ a solids processing apparatus having a central cavity that is substantially free of mechanical obstructions. The central cavity may be positioned in-line with the riser. The apparatus may be adapted for receiving solids within the central cavity and reducing the particle size of the solids by action of a cutter assembly which is positioned outside of the central cavity. The cut and processed solids may be pumped to the surface of the water.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: July 22, 2014
    Assignee: Chevron U.S.A. Inc.
    Inventor: Larry D. Reed
  • Publication number: 20120318581
    Abstract: In forming a mine shaft for an underground mine, earth excavated by a boring machine may be transported upwardly by a handling unit to a transfer station where it may be transferred into skips, which may be raised and lowered along skip guides within the shaft hole for transport of the excavated material to an earth surface region. The transfer station may be moved downwardly as excavation progresses.
    Type: Application
    Filed: June 15, 2012
    Publication date: December 20, 2012
    Inventors: Rocky Lynn Webb, Morris James Medd, Ryan George Gough, John Nicholas De La Vergne, Andy Robert Fearn, Fredric Christopher Delabbio
  • Patent number: 8316965
    Abstract: Drilling tool (1) for drilling a well downhole where fluid is surrounding the tool and where the tool has a housing (15) and is connected to an electrical conducting means, such as a wireline. The drilling tool has a drilling head (2) and a fluid cleaner (3) for removal of elements, such as debris and formation pieces, from the fluid while drilling downhole. The fluid cleaner has a chamber (4) and a filter (5) within the chamber for separation of the elements from the fluid. The tool further comprises a pump (8) for pumping the fluid into the chamber through an inlet (11) in the drilling head (2) and through the filter before entering the well again. Furthermore, the tool comprises a driving unit for driving the pump and the drilling head.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: November 27, 2012
    Assignee: Welltec A/S
    Inventors: Jørgen Hallundbaek, Thomas Sune Andersen
  • Publication number: 20120292112
    Abstract: An apparatus and method for drilling deeper and wider well bores is provided. The apparatus includes a motorized drill head for cutting and shredding ground material; a separate excavation line; a separate fluid delivery line; and a separate close loop engine cooling line. The excavation line consists of multiple connected stationary segments of the main pipe with periodical segments of an in-line excavation pump. Alternatively, in another embodiment, excavation line consists of multiple connected segments of the main stationary pipe with rotating continues screw inside. The close loop cooling line consists of one heat exchanger in the motorized drill head and one on the ground surface in the binary unit where fluid is cooled and in process electricity produced which can be used as a supplement for powering drill head, pumps, equipment, etc.
    Type: Application
    Filed: March 19, 2012
    Publication date: November 22, 2012
    Inventor: Nikola Lakic
  • Publication number: 20120080186
    Abstract: An apparatus, system and method is disclosed for processing geological solids or wellbore cuttings generated by excavation or drilling under a body of water. An apparatus for processing solids in association with a riser may employ a solids processing apparatus having a central cavity that is substantially free of mechanical obstructions. The central cavity may be positioned in-line with the riser. The apparatus may be adapted for receiving solids within the central cavity and reducing the particle size of the solids by action of a cutter assembly which is positioned outside of the central cavity. The cut and processed solids may be pumped to the surface of the water.
    Type: Application
    Filed: October 5, 2010
    Publication date: April 5, 2012
    Applicant: Chevron U.S.A. Inc.
    Inventor: Larry D. Reed
  • Patent number: 8074717
    Abstract: A method for drilling a well with a drilling apparatus comprising a drill string and a bit, comprising attaching a cleaning tool comprising a coaxial pipe and at least one vortex spinner to a portion of the drill string above the bit, inserting the drill string into a wellbore, extending the wellbore while simultaneously pumping fluid through the cleaning tool to create a fluid flow, and loosening debris attached to the wellbore.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: December 13, 2011
    Assignee: Shell Oil Company
    Inventor: Azra Nur Tutuncu
  • Publication number: 20110036631
    Abstract: A downhole rotational rate control apparatus, adapted for coupling to the lower end of a drill string, includes a progressive cavity (PC) motor, a driveshaft, a mud flow control valve, and an electronics section. Drilling mud flowing downward through the drill string is partially diverted to flow upward through the PC motor and out into the wellbore annulus, with the mud flow rate and, in turn, the PC motor speed being controlled by the mud flow control valve. The control valve is actuated by a control motor in response to inputs from a sensor assembly in the electronics section. The PC motor drives the driveshaft and a controlled downhole device at a specific zero or non-zero rotational rate. By varying the rotational rate of the PC motor relative to the rotational rate of the drill string, the tool face orientation or non-zero rotational speed of the controlled device in either direction can be varied in a controlled manner.
    Type: Application
    Filed: April 17, 2009
    Publication date: February 17, 2011
    Applicant: DRECO ENERGY SERVICES LTD.
    Inventors: Jonathan Ryan Prill, Nicholas Ryan Marchand, Ralph William Graeme Johns
  • Patent number: 7658244
    Abstract: A device for driving boreholes in the ground, having a rotationally driven main shaft with a shaft journal whose axis (B) forms an acute angle with respect to the axis (A) of the main shaft. A drill head is mounted such that it can rotate about the axis (B) of the shaft journal and has a circumferential region which runs on a complementary circumferential region, wherein the complementary circumferential region can be set rotating.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: February 9, 2010
    Assignee: Wirth Maschinen-und Bohrgerate-Fabrik GmbH
    Inventor: Michael Mohrmann
  • Patent number: 7172039
    Abstract: The present invention generally relates to an apparatus and method for use in a wellbore. In one aspect, a downhole tool for use in a wellbore is provided. The downhole tool includes a housing having a shaped inner bore, a first end and a second end. The downhole tool further includes a rotor having a plurality of extendable members, wherein the rotor is disposable in the shaped inner bore to form at least one chamber therebetween. Furthermore, the downhole tool includes a substantially axial fluid pathway through the chamber, wherein the fluid pathway includes at least one inlet proximate the first end and at least one outlet proximate the second end. In another aspect a downhole motor for use in a wellbore is provided. In yet another aspect, a method of rotating a downhole tool is provided.
    Type: Grant
    Filed: October 29, 2003
    Date of Patent: February 6, 2007
    Assignee: Weatherford/Lamb, Inc.
    Inventors: David Warren Teale, Greg Marshall
  • Patent number: 7051821
    Abstract: An adjustable hole cleaning device is provided for cleaning a hole in a subterranean formation. A drillstring containing the device is rotated to drill a hole through the subterranean formation. While rotating the drillstring, drilling fluid is circulated through the drillstring and the device into the hole. In response to an increase in a hydrostatic pressure of the fluid in the drillstring, cleaning elements are extended from the device to clean accumulated cuttings from the drilled hole. The cleaning elements may clean the accumulated cuttings by agitating the circulating fluid in the hole. In response to a decrease in a hydrostatic pressure of the fluid in the drillstring, the cleaning elements may be retracted back into the device. The device may also include a set of ports which hydraulically open in response to the increase of hydrostatic pressure in the drillstring to disperse drilling fluid into the hole for cleaning accumulated cuttings.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: May 30, 2006
    Assignee: Halliburton
    Inventor: Robello Samuel
  • Patent number: 6481510
    Abstract: A directional drill for transport via rail tracks and railwheels associated with the directional drill to an operating location. The directional drill has a first frame associated with a set of pneumatic tires for movement of the directional drill onto and off of the tracks and, when removed from the tracks, for movement to the operating location. A second frame is rotatably attached to the first frame and allows the drilling configuration of the second frame to be more nearly horizontal relative to the first frame. Hydraulic lines move during drilling and are maintained in a predetermined configuration to reduce vibration and chaffing.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: November 19, 2002
    Assignee: 360fiber ltd,
    Inventors: Lionel Charles Desmarais, Bernie A. Stene
  • Patent number: 5901797
    Abstract: A drilling apparatus having cuttings removal structure to reduce balling thereof and to help prevent the accretion of portions of chips and debris from drilling thereon and/or the accretion of portions of drilling fluids thereon. The drilling apparatus comprises an apparatus body having a connection thereon and structure for contacting cut portions of the earth formation. The contacting structure may include chip breakers and flails or combinations thereof.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: May 11, 1999
    Assignee: Baker Hughes Incorporated
    Inventors: Wayne R. Hansen, Craig H. Cooley
  • Patent number: 5651420
    Abstract: A drilling apparatus having cuttings removal structure to reduce balling thereof comprising an apparatus body having a connection thereon, and structure for contacting cut potions of the earth formation. The contacting structure may include chip breakers, flexible cables, rotating nozzle assemblies, rotating turbine wheel assemblies, rotating vane assemblies, flails or combinations of these. The apparatus may include elastomeric portions and/or movable potions. The drilling apparatus may comprise a drill bit, drilling stabilizer, drill collar, reamer, downhole motor, etc.
    Type: Grant
    Filed: March 17, 1995
    Date of Patent: July 29, 1997
    Assignee: Baker Hughes, Inc.
    Inventors: Gordon A. Tibbitts, Craig H. Cooley
  • Patent number: 5622231
    Abstract: A method for forming substantially lateral boreholes from within an existing elongated shaft includes positioning a drilling unit within the existing shaft, bracing the drilling unit against a wall surrounding the existing shaft to transmit forces between the drilling unit and the medium surrounding the wall, and applying a drilling force from the drilling unit to cut through the wall of the existing shaft and form the substantially lateral borehole in the surrounding medium. A preferred apparatus for practicing the method includes an extendable insert ram within the drilling unit for extending a drill bit from the drilling unit and applying a drilling force to the drill bit to cut through the wall of the existing shaft. A supply of modular drill string elements are cyclically inserted between the insert ram and the drill bit so that repeated extensions of the insert ram further extends the drill bit into the surrounding medium to increase the length of the lateral borehole.
    Type: Grant
    Filed: June 19, 1995
    Date of Patent: April 22, 1997
    Inventor: Michael C. Thompson
  • Patent number: 5375669
    Abstract: A method and apparatus for removing drilling mud within entrained cuttings is provided using a pump for forcing fluid into a borehole, such that the fluid mixes with cuttings formed during the formation of the hole. The pipe receives the fluid and entrained cuttings at a first end of the pipe and returns the fluid and entrained cuttings to the surface at the second end of the pipe. At the first end of the pipe, air is injected into the drilling fluid with entrained cuttings to form bubbles therein, thereby increasing the velocity of the fluid and entrained cuttings through the pipe. In one alternative embodiment, a suction is provided at one end of the pipe to increase the speed of fluid and entrained cuttings therethrough. In a third embodiment of the present invention, an Archimedes screw is used to remove the fluid and entrained cuttings from the borehole.
    Type: Grant
    Filed: February 12, 1993
    Date of Patent: December 27, 1994
    Assignee: Cherrington Corporation
    Inventor: Martin D. Cherrington
  • Patent number: 5351764
    Abstract: A method and apparatus for enlarging an inverted arcuate underground path between two surface locations is disclosed, where the cuttings from the enlarging are removed. After the drilling of a pilot borehole, and possibly after some reaming operations, a reamer and hole cleaner are pulled through the path, with the reamer rotating as the drill string in the path rotates. The rotation of the drill string also powers a positive displacement pump inside of the hole cleaner, which pumps fluid and entrained cuttings to the surface behind the hole cleaner. Fluid may also be pumped into the reamer from behind the hole cleaner, preferably by way of an inlet pipe which surrounds the outlet from the pump. The hole cleaner includes an agitator, also powered by the rotation of the drill string, which agitates the fluid and cuttings while the drill string is rotated but is not being pulled to the surface.
    Type: Grant
    Filed: January 10, 1992
    Date of Patent: October 4, 1994
    Assignee: Cherrington Corporation
    Inventor: Martin D. Cherrington
  • Patent number: 5269384
    Abstract: A hole cleaning device 100 includes a housing having a porous region to communicate cuttings from a bore hole to the interior of the housing. A Venturi-effect pump creates a suction to draw cuttings from the hole into the housing. An outlet pipe coupled to the Venturi pump transports the cuttings out of the housing.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: December 14, 1993
    Assignee: Cherrington Corporation
    Inventor: Martin D. Cherrington
  • Patent number: 5230388
    Abstract: An apparatus for removing debris from a bore hole comprises a housing having apertures formed therein such that rotation of the housing causing entrapment of the cuttings from the bore hole. The positive displacement pump comprises a rotor surrounded by a stator coupled to the housing such that rotation of the stator rotates the housing. The positive displacement pump is operable to pump material from the housing responsive to relative movement between the rotor and stator. A motor rotates the stator, thereby cleaning the bore hole.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: July 27, 1993
    Assignee: Cherrington Corporation
    Inventor: Martin D. Cherrington
  • Patent number: 4934466
    Abstract: A device for borehole hydraulic mining includes a pipeline for delivering fluid into the hole accommodated inside a pipeline for bringing pulp to the surface and featuring a constant inside diameter along the entire length of this pipeline. The pipeline for delivering fluid into the hole carries a hydraulic jet. The device also has a hydraulic elevator with a fluid and pulp mixing chamber secured to the lower end of the pipeline for bringing pulp to the surface, and a nozzle secured to the lower end of the pipeline for delivering fluid into the hole. The fluid and pulp mixing chamber and the nozzle of the hydraulic elevator enclose the pipeline for drilling fluid into the hole with clearances allowed.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: June 19, 1990
    Inventors: Vladimir F. Paveliev, Grigory J. Abramov, Nikolai I. Babichev, Viktor A. Dmitriev
  • Patent number: 4790395
    Abstract: Pipe-driving apparatus used to create a pipe line of small diameter uses a pressing station in an access trench to drive in pipe sections one by one. A boring head and conveyor worm operates at the front of the pipe line in a working pipe section on which a cutting shoe is swivably mounted. The worm is a spiral flight on a drive shaft which runs within an open fronted container on which a drive unit for the boring head and the worm is mounted. Hydraulic bracing units mounted to the container can be swung out and engaged with stops in the working pipe section to brace the container during the filling operation. Projections on the container engage with the shoe and the bracing units can be used to steer the shoe. When the container is filled the bracing units re stowed and the container is withdrawn back down the pipe line to the access trench for discharging the material.
    Type: Grant
    Filed: February 11, 1987
    Date of Patent: December 13, 1988
    Assignee: Gewerkschaft Eisenhutte Westfalia GmbH
    Inventors: Helmut Gack, Gerhard Kaiser
  • Patent number: 4744426
    Abstract: A downhole tool positioned intermediate the mud motor and the drill bit, for reducing the hydro-static head near or around the bit. What is provided is an upper body portion threadably attachable to the mud motor and having an internal shaft with a bore therethrough for allowing mud to flow down the shaft rotatable during the the operation of the tool. The upper body portion further includes a gear member on the outer wall of the shaft for rotatably engaging the pair of upper gear members which imparts rotation to a pair of lower gear members for further imparting rotation to a fan member located in the lower portion of the tool.
    Type: Grant
    Filed: June 2, 1986
    Date of Patent: May 17, 1988
    Inventor: John A. Reed
  • Patent number: 4732226
    Abstract: A shaft drilling machine comprises a drill head carrying drill tools thereon, a device for guiding the drill head in a shaft, a device for advancing the drill head in the shaft, and drive aggregates which are lowered into the shaft together with the drill head and driving the latter. A sluice for providing a rinsing fluid is arranged in a pilot drill. A rinsing conduit and an ascending conduit for extracting from the shaft a drilled material-rinsing fluid mixture generated during the drilling operation are connected to the sluice which is formed as a bucket wheel.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: March 22, 1988
    Assignee: Turmag Turbo-Maschinen AG and Gesellschaft Fuer Strahlen- und Umweltforschung Muenchen MBH
    Inventors: Wolfgang Ebeling, Helmut Kolditz
  • Patent number: 4718504
    Abstract: A trench excavator capable of excavating a trench of a rectangular section suitable for formation of an underground diaphragm wall. The underground diaphragm walls are now applied as underground structures replacing caissons, rigid foundations for multistory or tower like buildings, underground tanks and the like. In the trench excavator according to the invention, a pair of drum cutters and a ring cutter interposed therebetween form one unit and a plurality of such units are arranged parallel to one another, whereby an unexcavated portion produced between the drum cutters can be cut out by the ring cutter, leaving no unexcavated portion.
    Type: Grant
    Filed: March 10, 1986
    Date of Patent: January 12, 1988
    Assignee: Tone Boring Co., Ltd.
    Inventors: Tutomu Terashima, Hiroyuki Kawasaki, Tadao Takahashi
  • Patent number: 4646853
    Abstract: A shaft boring machine including a rotatable cutterwheel assembly with a horizontal axis mounted on a carriage having vertical travel. The carriage is mounted on a slewing base frame and rotates about the vertical axis of the machine. An excavating unit for muck removal is mounted opposite the cutterwheel on the slewing base frame and loads directly from the shaft bottom into a muck hopper. When the hopper is full, it is discharged into a hoist bucket which is hoisted to the surface. The machine is positioned in the shaft by upper and lower gripper systems. Walking cylinders between the two gripper rings advance the machine up or down the shaft.
    Type: Grant
    Filed: July 31, 1984
    Date of Patent: March 3, 1987
    Assignee: The Robbins Company
    Inventors: David B. Sugden, David T. Cass, Peter B. Dowden, Nicholas A. Hynd
  • Patent number: 4589502
    Abstract: An earth boring or shaft sinking apparatus in which a column is continuously rotatable about its axis, the column including a cutting wheel at one end rotatable about a wheel axis normal to the axis of the column, the cutting wheel including sprockets mounted about the wheel axis, the sprockets providing engagement for an endless bucket-carrying chain for direct conveyance of cuttings from the bottom of a hole to the top end of the column, which includes another set of sprockets for the endless bucket-carrying chain and discharges the cuttings into a feed bin. The cutting wheel is continuously rotated about the column longitudinal axis, as well as its wheel axis of rotation.
    Type: Grant
    Filed: May 4, 1984
    Date of Patent: May 20, 1986
    Assignee: Cementation Company of America, Incorporated
    Inventors: Martin de G. Salter, John G. S. Hynd
  • Patent number: 4483403
    Abstract: A shaft drilling machine has a circularly moving drilling head. The drilling head is angularly oriented with respect to the longitudinal axis of the shaft sought to be drilled. Loosened material is transported from the lower portion of the shaft by pickup means, moving with the drilling head, and taken to the upper portion of the angularly oriented bottom of the shaft, whereupon the loosened material or borings slide, by gravity, to a centrally located vertical conveyor mechanism for final removal of the material or borings from the shaft.
    Type: Grant
    Filed: May 5, 1982
    Date of Patent: November 20, 1984
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Johannes Hennecke, Heinz Horst, Helmut Podellek
  • Patent number: 4276944
    Abstract: An in-hole fluid motor assembly has a clutch engageable between the bearing housing and the drive shaft which is rotatable in the bearing housing, to connect the housing to the shaft and enable rotation of the bit by the housing. The clutch is engaged without increasing the load imposed on the bit. Drilling fluid in or flowing through the assembly and into the drive shaft is employed to hold the clutch disengaged while the circulating pump is running, and a spring normally acts to engage the clutch when the circulation of fluid is diminished by stopping the pump. In one form, the clutch may be automatically engaged if circulation is blocked and the pump continues to apply pressure to the fluid.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: July 7, 1981
    Assignee: Smith International, Inc.
    Inventor: Bela Geczy
  • Patent number: 4274675
    Abstract: An apparatus for the sinking of a shaft in which a machine platform can be anchored against the wall of the incipient shaft and carries an orbiting tool for cutting away the floor of the shaft, thereby dumping the detritus into a pilot-bore hole continuously drilled by a pilot-bore unit. The latter has a head for advancing the pilot bore and is provided with a worm conveyor running centrally through the shaft to transfer the detritus to a bucket on a loading platform disposed above the main platforms and connected thereto for feed cylinders. The platforms have cylinder arrangements whereby they can be independently anchored to the vertical wall of the shaft.
    Type: Grant
    Filed: August 23, 1979
    Date of Patent: June 23, 1981
    Inventors: Friedrich W. Paurat, Roland Paurat
  • Patent number: 4186808
    Abstract: An earth boring machine with a rotating cutter head having a multiple of individual cutters positioned at different distances from the center of rotation and angularly spaced from one another on the cutter head while the cutter head itself is shaped to direct the cuttings into a collecting area, which may be under the center of the rotary head or which may be concentric about the center area, has elevator means, which may be mechanical, hydraulic or pneumatic, to remove the cuttings from the collection area, and has one or more crushing rollers thereon arranged to crush cuttings which are too large for effective removal by the elevator means into small chips or fragments together with barrier means for restraining such oversize pieces in the path of the crushing roll or rollers so as to prevent their entry into the collection area until they have been adequately crushed. The barrier means so provided are arranged to permit the smaller fragments and chips to move into the collection area with little impedance.
    Type: Grant
    Filed: June 29, 1977
    Date of Patent: February 5, 1980
    Inventor: Kenneth C. Cox
  • Patent number: 4004642
    Abstract: Processes and apparatus in the field of Terradynamics, e. g. projectile penetration into soils and rocks, employing "open chamber" firing systems using "Trounds" (triangular rounds of ammunition). Included are salvo firings of small calibre projectiles for "shock wave" interaction drilling application of residual gun gases to actuate drill heads and/or reamers; a continuous self-contained feed system for feeding ammunition to be fired and removing and storing the used cases; remote self contained powering of the ammunition feed and storage by recoil of the gun, residual gun gases, electrical batteries, and/or combinations thereof; absorption of excess residual gun gas in an ambient environment of over 5000 psi external to the gun; and automatic clearing of the gun barrels from mud and or debris when embedded in a high pressure drilling mud external to a gun drill.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: January 25, 1977
    Inventor: David Dardick
  • Patent number: 3965995
    Abstract: A cutter wheel is mounted at the lower end of the machine for rotation about a horizontal tubular support. Cuttings are picked up by buckets on the cutter wheel and are directed into the tubular support to be received by an endless bucket conveyor which carries them upwardly to a discharge station. As the machine is advanced the cutter wheel is rotated to make a first cut in the shape of the leading portion of the cutter wheel. The cutter wheel is then retracted out from the cut and is rotated about the axis of the hole. This repositions the cutter wheel so that when it is advanced again it will make a second cut which crosses the first. This procedure is repeated until the desired cross-sectional configuration (e.g. circular) of the hole is obtained.
    Type: Grant
    Filed: March 6, 1975
    Date of Patent: June 29, 1976
    Assignee: The Robbins Company
    Inventor: David B. Sugden
  • Patent number: 3938598
    Abstract: The present invention relates to belling apparatus for forming a bell shaped recess at the lower end of a pier bore and is concerned primarily with such apparatus in which spoil generated by cutting the recess is continuously removed by an auger.
    Type: Grant
    Filed: May 14, 1975
    Date of Patent: February 17, 1976
    Inventor: James P. Watts
  • Patent number: 3934660
    Abstract: This is a deep well drill employing a Nelson air motor, a Nelson engine or other air motor for drilling power at the face of a petroleum or other deep well and having a cable and tube attached thereto and suspended from spools on a drill rig. A cutting container is attached to the drill to remove cuttings without mud. Drills for varying types of rock strata are provided. A type of foldable casing employed permits the use of the same diameter casing throughout the entire well of any depth, including deep wells to over 25,000 feet. Expandable bits at the end of the cable are provided for drilling selectively larger diameters for foldable casing walls and for safety valve and flow control anchors. The bits are also contractable for unobstructed travel up and down the well.
    Type: Grant
    Filed: July 2, 1974
    Date of Patent: January 27, 1976
    Inventor: Daniel E. Nelson