Plural Cutter Elements Longitudinally Relative Movable Into Transverse Alignment Patents (Class 175/265)
  • Patent number: 8973679
    Abstract: A downhole reaming system includes a tubular body having a drill bit disposed on a distal end thereof, and a central bore therethrough, wherein the tubular body is attached to a drillstring, an expandable reamer having cutter blocks coupled thereto and configured to selectively expand radially therefrom, a near-bit reamer disposed proximate the drill bit, the near-bit reamer having cutter blocks coupled thereto and configured to expand therefrom, and a measurement sub configured to measure at least one characteristic of an interior wall of an enlarged wellbore.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: March 10, 2015
    Assignee: Smith International, Inc.
    Inventors: Charles Dewey, Simon Mitchell
  • Patent number: 8863863
    Abstract: An undercutting tool for producing transverse grooves in a drilled hole. An upper support and a lower support axially delimit a receiving region of a shank. At least two spreading elements are disposed in the receiving region between the spreading elements and the receiving region. The shank and the supports are disposed so the axial distance between the supports can be reduced by exerting an axial force. The spreading elements each have an oblique upper and lower end face, which each have such an outer geometric shape, extending in a direction not perpendicular to the longitudinal axis and are displaced in substantially opposite radial directions, and the axial force is in each case converted to a radial force in the radial directions.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: October 21, 2014
    Inventor: Josef Hasler
  • Patent number: 8770321
    Abstract: A cutting structure for use with a reamer in enlarging a borehole in a subterranean formation includes a plurality of cutter blocks, radially extendable from a reamer body away from a central axis of the reamer body, each of the plurality of cutter blocks comprising at least one cutter blade thereon, wherein an angular spacing about the central axis of the reamer body between the at least one cutter blade on each of the plurality of cutter blocks is unequal.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: July 8, 2014
    Assignee: Smith International, Inc.
    Inventors: Navish Makkar, Tommy G. Ray, Manoj Mahajan, Dwayne P. Terracina, Sameer Bhoite
  • Patent number: 8550188
    Abstract: A cutting structure for use with a reamer in enlarging a borehole in a subterranean formation includes a plurality of cutter blocks, radially extendable from a reamer body away from a central axis of the reamer body, each of the plurality of cutter blocks comprising at least one cutter blade thereon, wherein an angular spacing about the central axis of the reamer body between the at least one cutter blade on each of the plurality of cutter blocks is unequal.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: October 8, 2013
    Assignee: Smith International, Inc.
    Inventors: Navish Makkar, Tommy G. Ray, Manoj Mahajan, Dwayne P. Terracina, Sameer Bhoite
  • Publication number: 20120279784
    Abstract: A downhole tool, for selectively reaming a wellbore or stabilizing drill string components within a wellbore, includes an elongate tool body adapted to receive reamer cartridges or stabilizer cartridges depending on the function desired, The reamer cartridges are radially insertable into corresponding pockets in the tool body, with each reamer cartridge having a reamer insert with an array of cutting elements. The reamer insert is disposed within a bushing and is rotatable relative thereto, about a rotational axis transverse to the longitudinal axis of the tool. However, the rotational axis is offset from the tool body axis, resulting in eccentric contact of the cutting elements with the wall of the wellbore, which in turn imparts rotation to the reamer insert when the tool is being moved axially through a wellbore without rotation.
    Type: Application
    Filed: May 5, 2010
    Publication date: November 8, 2012
    Applicant: DYNOMAX DRILLING TOOLS INC.
    Inventors: Michael James Harvey, Jovan Vacar, Milan Rajic
  • Publication number: 20120255786
    Abstract: A well bore reaming device and method are disclosed. The device includes a drill string, a bottom eccentric reamer coupled to the drill string, and a top eccentric reamer coupled to the drill string, wherein the bottom and top eccentric reamers have a prearranged spacing and orientation.
    Type: Application
    Filed: April 9, 2012
    Publication date: October 11, 2012
    Inventor: James D. Isenhour
  • Publication number: 20120211280
    Abstract: A downhole reaming system includes a tubular body having a drill bit disposed on a distal end thereof, and a central bore therethrough, wherein the tubular body is attached to a drillstring, an expandable reamer having cutter blocks coupled thereto and configured to selectively expand radially therefrom, a near-bit reamer disposed proximate the drill bit, the near-bit reamer having cutter blocks coupled thereto and configured to expand therefrom, and a measurement sub configured to measure at least one characteristic of an interior wall of an enlarged wellbore.
    Type: Application
    Filed: February 23, 2011
    Publication date: August 23, 2012
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Charles Dewey, Simon Mitchell
  • Publication number: 20120168229
    Abstract: An expandable downhole tool apparatus is disclosed. The apparatus comprises a body adapted to be incorporated into a drill string and at least one working member moveable relative to the body between an inward deactivated position and an outwardly deployed activated position in order to engage the wall of a borehole. Activation means adapted to move at least one said working member between the inward deactivated position and outwardly deployed activated position is provided. At least one passage is formed through the body and extends from a location on the body adjacent at least one working member to a location remote from the respective working member to enable debris accumulating underneath the respective working member to move along the passage and exit the body.
    Type: Application
    Filed: August 20, 2010
    Publication date: July 5, 2012
    Inventor: Paul Bernard Lee
  • Publication number: 20120055714
    Abstract: An under-reamer includes a body and extendable cutters mounted on the body. The under-reamer is configured to be cycled between a first configuration in which the cutters are retracted and a second configuration in which the cutters are movable between retracted and extended positions. A control mechanism is provided and is configurable to prevent the under-reamer cycling between the first and second configurations and thus maintains the under-reamer in a selected one of the first and second configurations.
    Type: Application
    Filed: April 9, 2010
    Publication date: March 8, 2012
    Applicant: ANDERGAUGE LIMITED
    Inventor: Mark Adam
  • Patent number: 8118099
    Abstract: A method for forming and sealing a hole in a sidewall of a borehole may include conveying a bit and a sealer into the borehole using a carrier, forming a hole in the sidewall using the bit, and introducing a sealant from the sealer to the hole along a surface portion of the bit. An apparatus for forming and sealing a hole in a sidewall of a borehole includes a carrier conveyable into the borehole, a bit disposed on the carrier that forms the hole in a sidewall, and a sealer operable to introduce a sealant to the hole along a surface portion of the bit.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: February 21, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Michael J. Moody, John M. Michaels
  • Publication number: 20110220416
    Abstract: This apparatus provides an underreamer and a reamer or hole opener to enlarge an existing pilot hole thereby permitting further operation to be carried out in a well bore. The underreamer can be inserted down a well bore in the unexpanded condition and, since the radius of the eccentrically mounted cutters of the reamer or hole opener added to the radius of the unexpanded underreamer equals the pass through diameter (the inner diameter of the restriction), the entire assembly or apparatus can be inserted to the position requiring enlarging. The underreamer is expanded to engage the adjacent wall of the well bore and stabilize the reamer as it enlarges the hole. Since movement resulting from the lateral forces are restrained by the centralizer/underreamer as well as the bullnose or smaller pilot hole drill bit, the bi-center reamer can readily open the well bore to the desired diameter without lateral deviation.
    Type: Application
    Filed: November 16, 2009
    Publication date: September 15, 2011
    Inventor: Allen Kent Rives
  • Publication number: 20110005840
    Abstract: In various embodiments, a mining device can include a first housing portion and a second housing portion where relative movement between the first and second housing portions can extend and/or retract a cutting member with respect to the mining device. The mining device can further include a cable which can be mounted to the second housing portion where the cutting member is mounted to the cable and can be radially extended with respect to the first and second housing portions when the second housing portion is moved relative to the first housing portion along an axis. As the cutting member is extended, it can contact the sidewalls of a subterranean shaft to loosen material therefrom.
    Type: Application
    Filed: July 19, 2010
    Publication date: January 13, 2011
    Inventors: Larry P. Gourley, Allen J. Gourley
  • Patent number: 7757787
    Abstract: An expandable drilling apparatus includes a main body comprising a central bore and at least one axial recess configured to receive an arm assembly operable between a retracted position and an extended position, a biasing member to urge the arm assembly into the retracted position, a drive position configured to thrust the arm assembly into the extended position when in communication with drilling fluids in the central bore, a selector piston translatable between an open position and a closed position, wherein the selector piston is thrust into the open position when a pressure of the drilling fluids exceeds an activation value, wherein the drilling fluids are in communication with the drive piston when the selector piston is in the open position, and a selector spring configured to thrust the selector piston into the closed position when the pressure of the drilling fluids falls below a reset value.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: July 20, 2010
    Assignee: Smith International, Inc.
    Inventors: Alexander Craig Mackay, George Armando Espiritu, Charles H. Dewey
  • Patent number: 7681667
    Abstract: Drilling apparatus, such as an underreamer comprises a generally cylindrical tubular body and two cutting blades pivotally mounted to the body and movable between a retracted position and an extended position. Each cutting blade has a retracted position minimum gauge cutting portion and an extended position maximum gauge cutting portion, with the blades in the extended position the gauge cutting portions extending axially and being located in a transverse plane on or forward of the blade pivot axis.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: March 23, 2010
    Assignee: Weatherford/Lamb, Inc.
    Inventor: Giancarlo Pia
  • Publication number: 20090294178
    Abstract: Drilling systems and methods for enlarging a borehole that include at least one expandable reamer and at least one expandable stabilizer axially spaced therefrom in a tubular string such as a drill string, the at least one expandable reamer and the at least one expandable stabilizer being independently actuatable by different-sized actuation devices. A relatively lower tool is actuatable by a smaller actuation device, such as a drop ball, which passes through a relatively higher tool in the drill string without triggering the higher tool.
    Type: Application
    Filed: May 1, 2009
    Publication date: December 3, 2009
    Inventor: Steven R. Radford
  • Patent number: 7597158
    Abstract: An expandable drilling apparatus is deployed upon a distal end of a drillstring and includes a cutting head and a substantially tubular main body adjacent the cutting head providing a plurality of axial recesses configured to receive arm assemblies configured to translate between a retracted and an extended position. A flow switch actuates the arm assemblies when a drilling fluid pressure exceeds an activation value and the drilling apparatus includes a biasing member to reset the arm assemblies when the drilling fluid pressure falls below a reset value.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: October 6, 2009
    Assignee: Smith International, Inc.
    Inventors: John E. Campbell, Charles H. Dewey, Lance D. Underwood, Ronald G. Schmidt
  • Publication number: 20090139772
    Abstract: To provide a diametrically expanded groove cutting apparatus capable of simultaneously cutting a plurality of diametrically expanded annular grooves on an inner peripheral wall of an anchor prepared hole for planting an anchor bar therein, and to provide an expandable mechanism used in the diametrically expanded groove cutting apparatus.
    Type: Application
    Filed: November 13, 2006
    Publication date: June 4, 2009
    Applicant: Kabushiki Kaisha Myanaga
    Inventor: Masaaki Miyanaga
  • Publication number: 20090114448
    Abstract: An expandable downhole tool for use in a drilling assembly positioned within a wellbore includes a tool body having an axial flowbore extending therethrough and a moveable arm. The moveable arm includes a roller structure including cutters and rotatably mounted on the moveable arm. The moveable arm is configured to move outwardly in response to actuation of the expandable downhole tool.
    Type: Application
    Filed: November 1, 2007
    Publication date: May 7, 2009
    Applicant: SMITH INTERNATIONAL, INC.
    Inventors: Tommy Laird, Gail R. Nelson, David William Rodman
  • Patent number: 7506703
    Abstract: An expandable drilling apparatus is deployed upon a distal end of a drillstring and includes a cutting head and a substantially tubular main body adjacent the cutting head providing a plurality of axial recesses configured to receive arm assemblies configured to translate between a retracted and an extended position. A flow switch actuates the arm assemblies when a drilling fluid pressure exceeds an activation value and the drilling apparatus includes a biasing member to reset the arm assemblies when the drilling fluid pressure falls below a reset value.
    Type: Grant
    Filed: January 18, 2006
    Date of Patent: March 24, 2009
    Assignee: Smith International, Inc.
    Inventors: John E. Campbell, Charles H. Dewey, Lance D. Underwood, Ronald G. Schmidt
  • Publication number: 20090057013
    Abstract: In various embodiments, a mining device can include a first housing portion and a second housing portion where relative movement between the first and second housing portions can extend and/or retract a cutting member with respect to the mining device. The mining device can further include a cable which can be mounted to the second housing portion where the cutting member is mounted to the cable and can be radially extended with respect to the first and second housing portions when the second housing portion is moved relative to the first housing portion along an axis. As the cutting member is extended, it can contact the sidewalls of a subterranean shaft to loosen material therefrom.
    Type: Application
    Filed: August 29, 2007
    Publication date: March 5, 2009
    Inventors: Larry P. Gourley, Allen J. Gourley
  • Patent number: 7410015
    Abstract: An expandable drill bit comprises a body for mounting on a support string DS, a plurality of drill arms 3A, 3B, 3C, 3D, 4A, 4B, 4C, 4D coupled to the body and extending along a central longitudinal axis LL?, and at least one drill arm supporting cutting elements 6A. The plurality of drill arms 3A, 3B, 3C, 3D, 4A, 4B, 4C, 4D are pivotable between a retracted configuration and an expanded configuration. The retracted configuration defines an expandable drill bit having a first cutting diameter D1. The expanded configuration defines an expandable drill bit having a second cutting diameter D2 greater than the first cutting diameter. The drill arms 3A, 3B, 3C, 3D, 4A, 4B, 4C, 4D are driven from the retracted configuration into the expanded configuration when the expandable drill bit is rotated at a speed of rotation at least equal to a determined expanding speed of rotation.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: August 12, 2008
    Assignee: Schlumberger Technology Corporation
    Inventor: Henri Denoix
  • Publication number: 20080164065
    Abstract: A method for constructing a lateral hole (303) departing from a main well (302) at a determined depth, the lateral hole (303) having a direction of elongation forming a determined angle with the main well (302), comprises positioning a drilling machine (301) at the determined depth in the main well (302), drilling the lateral hole (303) departing from a wall of the main well (302), in substantially the direction of elongation forming the determined angle with the main well (302), using the drilling machine (301), constructing a tubular (305) for the lateral hole (303) at a downhole location, and positioning the constructed tubular (305) into the lateral hole (303).
    Type: Application
    Filed: July 2, 2004
    Publication date: July 10, 2008
    Inventors: Jacques Orban, Bernard Montaron
  • Patent number: 7370712
    Abstract: An under reamer for expanding a borehole through an earthen formation is taught. The under reamer includes: a mandrel including an end for connection into a drill string and an opposite end and a housing including an inner bore, telescopically disposed over the mandrel and axially moveable relative to the mandrel but rotationally moveable with the mandrel. A plurality of under reamer arms are carried on the housing, the under reamer arms are formed as blocks including cutter-supporting portions in which poly-crystalline diamond compact cutters are mounted. The under reamer arms are moveable by driving the housing axially over the mandrel between a retracted position extending into the bore of the housing and an expanded position wherein the under reamers arms are pivoted out of the housing inner bore and supported therebehind by the mandrel such that the cutter-supporting portions are exposed for use to enlarge a borehole.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: May 13, 2008
    Assignee: Tesco Corporation
    Inventors: Mark Clifton Stout, Cristian Mihai Catrinescu, Bruno H. Walter
  • Patent number: 7063155
    Abstract: Casing cutter for severing multiple tubulars in a well bore has a pair of cutter blades pivotally mounted on a support body. The blades are pivotally mounted for gradual movement outside of the support body when downward force is applied to proximate ends of the cutter blades. The support body is rotated inside the innermost of the multiple tubulars, while the cutter blades sever the tubulars of progressively increasing diameter.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: June 20, 2006
    Assignee: Deltide Fishing & Rental Tools, Inc.
    Inventor: David J. Ruttley
  • Patent number: 6973978
    Abstract: A drilling tool having an expandable bladder and a method for using the same are provided. The drilling tool includes a tool body having an interior cavity, a plurality of extendable arms coupled with the tool body, and an expandable bladder at least partially disposed within the interior cavity of the tool body. The expandable is operable to deploy the extendable arms from a retracted position relative to the exterior surface of the tool body to an extended position relative to the exterior surface of the tool body.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: December 13, 2005
    Assignee: Varel International, Ltd.
    Inventor: Philippe Louis Cravatte
  • Patent number: 6722452
    Abstract: An underreamer for forming a cavity within a well bore includes a housing adapted to be rotatably disposed within the well bore and a piston slidably coupled to the housing. The underreamer also includes a first cutter having a first end and a second end. The first end of the first cutter is pivotally coupled to the housing. The underreamer further includes a second cutter having a first end and a second end. The first end of the second cutter is coupled to the piston. The second end of the first cutter is coupled to the second cutter such that an axial force applied to the piston is operable to slide the piston relative to the housing and extend the second end of the second cutter radially outward relative to the housing from a retracted position to form the cavity when the housing is rotated relative to the well bore.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: April 20, 2004
    Assignee: CDX Gas, LLC
    Inventors: Monty H. Rial, Lawrence W. Diamond, Joseph A. Zupanick, Harold E. Payne
  • Patent number: 6695074
    Abstract: A reaming tool for enlarging an earth bore in a subsurface formation in which a sub is connected to a lower end of a drill string and elongated cutter blades are pivotally secured to a lower end of the body which have cutter elements preferably in the form of rotatable cutter disks along their leading edges and a fluid delivery hose leads into fluid passages in each of the cutter blades to supply fluid under pressure to a series of fluid discharge nozzles associated with the cutter elements.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: February 24, 2004
    Inventor: Alan L. Nackerud
  • Patent number: 6691803
    Abstract: A drill bit assembly for earth boring operations in which a sub is connected to a lower end of a drill string and elongated cutter blades are pivotally secured to a lower end of the body which have cutter elements preferably in the form of rotatable cutter disks along their leading edges and a fluid delivery hose leads into fluid passages in each of the cutter blades to supply fluid under pressure to a series of fluid discharge nozzles associated with the cutter disks.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: February 17, 2004
    Inventor: Alan L. Nackerud
  • Patent number: 6595302
    Abstract: An underreamer for forming a cavity within a well bore includes a housing rotatably disposed within the well bore. The underreamer also includes a plurality of cutting blades pivotally coupled to the housing. The underreamer further includes a piston slidably disposed within the housing and adapted to engage the cutting blades. The piston is operable to receive a downwardly disposed force operable slide the piston relative to the housing. The sliding movement of the piston extends the cutting blades outwardly from a retracted position relative to the housing. The underreamer also includes a passage disposed within the piston and operable to communicate a fluid received via an annulus of the housing to the cutting blades.
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: July 22, 2003
    Assignee: CDX Gas, LLC
    Inventors: Lawrence W. Diamond, Harold E. Payne
  • Patent number: 6454024
    Abstract: In a retrievable drill bit assembly, a standard drill pipe or casing pipe has a sub threaded into its lower end which forms a seat coupling for upper rounded pivotal ends of a pair of drill bits which are pivotally mounted between a pair of lift plates. The drill bits have blades extending from the pivotal ends with hardened cutter elements in staggered relation along or adjacent to the leading edge and a fluid passage leading into a series of nozzles in the blades which together with the rotational force of the drill pipe and the frictional force of the blades on the material to be bored will cause the blades to assume and maintain a mutually perpendicular position. The blades or cutters can be retrieved by a retrieval apparatus for the purpose of removal and replacement with a new set of blades.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: September 24, 2002
    Inventor: Alan L. Nackerud
  • Patent number: 6070677
    Abstract: An apparatus for enhancing production from a wellbore hole may include a body member having at least one cutting assembly. Each cutting assembly may have an upper, middle, and lower cutting arm. The cutting arms are hingedly connected to one another. An upper end of each upper cutting arm is hingedly connected to the body member. A lower end of each lower cutting arm is hingedly connected to a corresponding beveled attachment that is slidably received within a corresponding beveled groove in the body member. The body member includes an interior longitudinal bore in fluid communication with a jet nozzle that is located beneath each cutting assembly. The apparatus is connected to a drill string. As the drill string is rotated, each cutting assembly is moved to a fully-deployed position under centrifugal force, thereby enlarging the wellbore hole. Drilling fluid may be pumped into the apparatus to generate hydraulic power to carry loose cuttings to the surface.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: June 6, 2000
    Assignee: I.D.A. Corporation
    Inventor: Hugh L. Johnston, Jr.
  • Patent number: 5881827
    Abstract: Extendable bit teeth are supported by the guide grooves formed on the end face at the point of a bit body in such a manner as to be slidable. The extendable bit teeth slide along the guide grooves in an excavating direction to thereby project from the end face at the point of the bit body. The extendable bit teeth slide in an opposite direction to the excavating direction to project from the outer periphery of the point of the bit body. Since the extendable bit teeth are pressed against the ground during excavation, the extendable bit teeth projects from the outer periphery of the point of the bit body so that the bit gauge can be extended, and most of the excavation hole is excavated by the bit body.
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: March 16, 1999
    Assignee: Tone Corporation
    Inventors: Nobuhisa Ikeda, Hiroyuki Kawasaki, Taro Watanabe
  • Patent number: 4971163
    Abstract: A drilling bucket apparatus for expanding a bore-hole bottom for a cast-in-place pile. Drill bits are pivotally suspended from the upper portion of a drill pipe, which is a main frame of the apparatus, and are expanded and retracted radially by means of hydraulic cylinders. A bucket is attached to the lower end of the drill pipe and scrapers are installed on the side of the bucket. The scrapers are arranged to open and close sideward, following the movement of the drill bits. During drilling work, the apparatus is suspended from a kelly bar of a drilling machine. When the apparatus is rotated and the drill bits are expanded, the whole expanded shape of a bore-hole bottom is drilled simultaneously and cuttings are scraped into the bucket by means of the drill bits and the scrapers. Further, a bottom lid of the bucket can be released by operating a hydraulically-actuated opening laver, whereby, cuttings are discharged automatically.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: November 20, 1990
    Assignee: Kabushiki Kaisha Konoike Gumi
    Inventors: Akira Ohashi, Takashi Matsuike
  • Patent number: 4915181
    Abstract: A tubing bit opener is disclosed having upper and lower cutters with the lower cutters being carried by mounting blocks having bevelled edges which are received in matching undercut grooves in the tubing bit opener. The upper cutters are attached to arms which are slidable within inclined pockets of the tubing bit opener for inward and outward movement relative to the tubing bit opener. Both the mounting blocks carrying the lower cutters and the arms carrying the upper cutters are easily removable for maintenance and repair. The lower mounting blocks are held securely in place by the drill body. Because the surfaces of the lower mounting blocks extend laterally along a considerable extent of the adjacent lowr cutters, the cutters are supported for stable rotation without vibration. The tubing bit opener is typically used to sink six inch diameter or larger caissons in any rock formation on land or under water.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: April 10, 1990
    Inventor: Jerome Labrosse
  • Patent number: 4819744
    Abstract: An ice auger includes a pair of ice boring blades fixedly attached to the bottom of a straight inner auger drive bar. A brace and bit arrangement at the top of the drive bar is for rotating the drive bar and either forcing it down toward the ice to bore a cylindrical hole of predetermined diameter through the ice or to force it up away from the ice after the hole has been bored to ream out a portion of that hole to form an inverted funnel shape opening. A tubular outer sleeve surrounds the drive bar and is movable between an upper boring condition and a lower reaming condition with respect to the drive bar. Two slotted longitudinally extending ice reaming blades are pivotally mounted at their top portions to the ream control sleeve. A reaming blade camming support bar attached to a bottom portion of the drive bar carries camming pins slidable in the reaming blade slots.
    Type: Grant
    Filed: April 18, 1988
    Date of Patent: April 11, 1989
    Inventor: Ty J. Caswell
  • Patent number: 4809793
    Abstract: A downhole cutting tool, specifically adapted to function as an enhanced diameter clean-out tool, includes longitudinal bores which are opened to fluid flow when cutting members are moved to their extended positions. Upper and lower subassemblies are connected through an adapter which establishes an angular offset between an upper pair of extendible members and a lower pair of extendible members, which upper pair functions as a stabilizing structure to stabilize rotation of the tool and which lower pair functions as an enhanced diameter cutter.
    Type: Grant
    Filed: October 19, 1987
    Date of Patent: March 7, 1989
    Inventor: Charles D. Hailey
  • Patent number: 4604818
    Abstract: An under reaming pile bore excavating bucket by which an under reamed part of a pile bore is excavated and the excavated soil is moved into the bucket for easy removal of the soil. In use, the bucket is lowered to the bottom of an already excavated straight pile bore; side apertures of the bucket are opened; the slidable wing drill bits are rotated and moved downward and outward along guide rails to excavate an under reamed part. The excavated soil is taken into the bucket through the side apertures and openable bottom apertures. When the drill bits reach their lowermost position, the drill bits are rotated reversely to house the drill bits again into the bucket and lastly the side apertures are closed. The soil within the bucket is raised from the excavated pile bore. In particular, a drive shaft is spline engaged with an outer pipe fixed to the center of the bucket body for allowing the slidable bits to rotate and further move downward or outward.
    Type: Grant
    Filed: July 24, 1985
    Date of Patent: August 12, 1986
    Assignee: Kabushiki Kaisha Tokyo Seisakusho
    Inventor: Hachiro Inoue
  • Patent number: 4488606
    Abstract: An under-reaming pile bore excavator by which a straight pile bore is first excavated vertically to a given depth by rotating the main drill bits and the under-reamed bore is next excavated downward and outward into a given shape by rotating the slidable wing bits. The under-reaming pile bore excavator of the present invention comprises a plurality of guide rails, and a plurality of slidable wing bits mounted on the guide rails which excavate the under-reamed bore, in addition to the conventional main drill bits which excavate the straight pile bore. In using the under-reaming pile bore excavator of the present invention, it is possible to obtain a stable impermeable soil surface on the excavated bore to prevent water from penetrating into the soil wall and to prevent lumps of soil from being dislodged therefrom.
    Type: Grant
    Filed: April 1, 1983
    Date of Patent: December 18, 1984
    Inventor: Hachiro Inoue
  • Patent number: 4396076
    Abstract: An under-reaming pile bore excavator by which a straight pile bore is first excavated vertically to a given depth by rotating the main drill bits and the under-reamed bore is next excavated downward and outward into a given shape by rotating the slidable wing bits. The under-reaming pile bore excavator of the present invention comprises a plurality of guide rails, and a plurality of slidable wing bits mounted on the guide rails which excavate the under-reamed bore, in addition to the conventional main drill bits which excavate the straight pile bore. In using the under-reaming pile bore excavator of the present invention, it is possible to obtain a stable impermeable soil surface on the excavated bore to prevent water from penetrating into the soil wall and to prevent lumps of soil from being dislodged therefrom.
    Type: Grant
    Filed: April 27, 1981
    Date of Patent: August 2, 1983
    Inventor: Hachiro Inoue
  • Patent number: 4366988
    Abstract: A well bore is formed which runs down to an underground region having deposits of mineral material to be mined, by installing a casing or a drill pipe into the ground. A piping assembly is placed in the bore hole through the casing and the mineral material comminuted by means of water jet action or by vibratory action of a portion of the piping thereagainst or by both types of action operating simultaneously. The mineral material is mixed with the water in the bore hole to form a slurry which is removed from the bore hole through the piping by sonic pumping action or by virtue of the slurry rising to the surface as the bore hole fills, with oil floating to the top of the slurry material.
    Type: Grant
    Filed: April 7, 1980
    Date of Patent: January 4, 1983
    Inventor: Albert G. Bodine
  • Patent number: 4141421
    Abstract: The present invention consists of an under reamer tool for enlarging, scraping or smoothing a well bore. The tool is attached to a conventional drill string above a conventional bit and involves cutting elements that have retractable cutters arranged for extension from the tool to engage the well bore wall, each cutter, when the drill string is turned, being urged outwardly by centrifugal force until it engages the well bore wall, continued turning thereafter, pulling that cutter into its extended cutting attitude, reaming the wall to the desired diameter, cutter retraction involving ceasing turning the drill string and the pulling of the drill string and connected tool from the well bore.
    Type: Grant
    Filed: August 17, 1977
    Date of Patent: February 27, 1979
    Inventor: Benjamin R. Gardner