Bit With Leading Portion (e.g., Pilot) Forming Smaller Diameter Initial Bore Patents (Class 175/385)
  • Patent number: 9702196
    Abstract: A coring tool may comprise a core bit, and the core bit may comprise at least one cutting structure extending from adjacent an inner bore of the core bit to an outer gage of the core bit. A drill plug may be configured to close the inner bore of the core bit, and the drill plug may comprise at least one cutting structure. An indexing device may be disposed between the drill plug and the core bit. The indexing device may be configured to maintain a predetermined angular relationship between the core bit and the drill plug. The at least one cutting structure of the core bit and the at least one cutting structure of the drill plug may form a substantially continuous cutting structure at the predetermined angular relationship. Related methods of drilling with a coring tool.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: July 11, 2017
    Assignee: Baker Hughes Incorporated
    Inventor: Nathaniel R. Adams
  • Patent number: 9458673
    Abstract: The present invention provides a hard-rock core barrel roller cutter assembly, which comprises a roller cutter and a saddle. The roller cutter comprises a base portion for operating, and a connecting portion integrated with the base portion and detachably connected to the saddle. The connecting portion has a butted oblique plane, and a width of the connecting portion is gradually increased from one end adjacent to the base portion to another end far away from the base portion. A fixing block is detachably connected to the saddle, and the fixing block has a pressure slope which matches with the butted oblique plane. A width of the fixing block is gradually decreased from one end adjacent to the base portion to another end far away from the base portion, and the saddle is muff-jointed out of the connecting portion and the fixing block.
    Type: Grant
    Filed: February 17, 2013
    Date of Patent: October 4, 2016
    Inventor: Chung Jie Vinsing Ching
  • Patent number: 9004195
    Abstract: A method of forming a wellbore is disclosed. An inner string and an outer string are conveyed downhole. The inner string is attached to the outer string at a first location and the wellbore is formed. The inner stringy is attached to the outer string at a second location us hole of the first location and an annulus between the outer string and the wellbore is cemented without retrieving the inner string from the wellbore.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: April 14, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Thorsten Regener, Ingo Roders, Carl C. Clemmensen, Sascha Schwartze, Trond R. Skar, Tore Sorheim, Morten Eidem, Gaute Grindhaug
  • Patent number: 8978783
    Abstract: The expandable tools disclosed herein may be used as an underreamer to enlarge a borehole, or may be used to stabilize a drilling system in a previously underreamed borehole or in a borehole that is being underreamed while drilling progresses. At least one moveable arm, which translates between a collapsed and expanded position in response to a differential pressure between the axial flowbore and the wellbore, includes a borehole-engaging surface with cutting elements and at least one nozzle to direct a fluid across the borehole-engaging surface. Flow directing elements on the external surface of the tool may be used to decrease the flow area in an annulus between the tool and the wellbore and directs fluid flow in the annulus toward the borehole-engaging surface.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: March 17, 2015
    Assignee: Smith International, Inc.
    Inventors: Brian Cruickshank, Manoj Mahajan, Navish Makkar, Sameer Bhoite, Charles Dewey
  • Patent number: 8960329
    Abstract: The present invention provides apparatus and methods for controlled steering. One embodiment of the invention provides a bit body comprising a trailing end, a pilot section, and a reaming section. The trailing end is adapted to be detachably secured to a drill string. The pilot section is located on a leading, opposite end of the bit body. The reaming section is located intermediate to the leading and trailing ends. The pilot section comprises at least one steering device for steering the pilot section of the bit body, thereby steering the entire bit body. Another embodiment of the invention provides a wellsite system comprising a drill string; a kelly coupled to the drill string; and a bit body as described above. Another embodiment of the invention provides a method of drilling a curved borehole in a subsurface formation.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: February 24, 2015
    Assignee: Schlumberger Technology Corporation
    Inventor: Geoff Downton
  • Patent number: 8950517
    Abstract: A drill bit having a bit body intermediate a shank and a working face having at least one cutting insert. A bore is formed in the working face co-axial within an axis of rotation of the drill bit. A jack element is retained within the bore by a retaining element that intrudes a diameter of the bore.
    Type: Grant
    Filed: June 27, 2010
    Date of Patent: February 10, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, Francis Leany, Joe Fox, Tyson J. Wilde, Boyd Black
  • Patent number: 8910729
    Abstract: An apparatus for drilling a hole in the ground has a hammer drill installed at a bottom of a rod assembled in multi-stages at support structure on the ground. The hammer drill has a pilot hammer drill and a reamer hammer drill coupled to each other through a key structure formed in the vertical direction so as to allow simultaneous rotations and up-and-down movements relative to each other.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: December 16, 2014
    Assignee: Core Geotechnics Co., Ltd.
    Inventor: Sun Keun Park
  • Publication number: 20140262534
    Abstract: A subterranean support-bolt drilling assembly has a drill bit rotatable about a central axis and including at least one cutting edge. The drilling assembly also includes a spacer coupled to a rearward end of the drill bit. A reamer member is coupled to a rearward end of the spacer, the reamer member having at least one cutting element, the at least one cutting element having a cutting edge that extends radially beyond an outer peripheral portion of the drill bit relative to the central axis. A subterranean support-bolt drill bit includes a bit body and at least one cutting element coupled to the bit body. The support-bolt drill bit has a central pilot extending from the bit body in an axially forward direction. The cutting edge of the at least one cutting element extends radially beyond the central pilot relative to a central axis of the drill bit.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventor: Dover BMCS Acquisition Corporation
  • Patent number: 8820440
    Abstract: In one aspect of the present invention, a steering assembly for downhole directional drilling comprises an outer bit comprising a bore and an outer cutting area and in inner bit comprising an inner cutting area and connected to a shaft that is disposed within the bore. At least one biasing mechanism is disposed around the shaft. At least one fluid channel is disposed within the outer bit and redirects fluid to the at least one biasing mechanism causing the at least one biasing mechanism to push the shaft and alter an axis of the inner bit with respect to an axis of the outer bit.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: September 2, 2014
    Inventors: David R. Hall, Scott Dahlgren, Jonathan Marshall
  • Patent number: 8757295
    Abstract: The invention relates to a drill for realizing a partially tapered bore hole in a soil covering a hardpan layer. The drill comprises a rotatable drivable unit that is provided with a carrying structure and a multiple number of cutting elements carried by the carrying structure. The multiple number of cutting elements are arranged along a line extending substantially radially and outwardly from a central axis of the rotatable drivable unit. Further, lower ends of cutting elements in a radial inner section are mainly positioned in a plane transversely to the rotation axis of the rotatable drivable unit. Lower ends of cutting elements in a radial outer section are mainly positioned in a downwardly tapered surface having a symmetry axis coinciding with the rotation axis of the rotatable drivable unit. The lower ends of the cutting elements may subscribe, during rotation, a truncated cone surface.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: June 24, 2014
    Assignee: Holding P.M.M. Hoff B.V.
    Inventor: Petrus Mattheus Maria Hoff
  • Publication number: 20140144710
    Abstract: Drill assembly for making a hole into a soil or rock which arrangement comprises a pilot bit (10) drilling the middle part of the hole and a ring bit (1) drilling the outer circle of the hole in which case in the drilling situation the ring bit (1) is adjusted around the pilot bit (10) and rotary movement and drilling impacts are directed from the pilot bit (10) to the ring bit (1) with the help of the mentioned surfaces (4-6);(7-9),(15, 16) adjusted between the bits and conveying power and that the ring bit (1) can be removed around the pilot bit (10) and can be installed to it and that further a coupling ring (2) belongs around the ring bit (1) in order to join a casing pipe, which can be pulled to the drilled hole, to the ring bit (1) with the help of the mentioned coupling ring. The coupling ring.
    Type: Application
    Filed: October 14, 2011
    Publication date: May 29, 2014
    Inventors: Mikko Mattila, Pasi Korte
  • Patent number: 8640792
    Abstract: A bottom hole assembly to directionally drill a subterranean formation includes a drill bit, a stabilizer assembly located proximate to and behind the drill bit, a drilling assembly comprising a drive mechanism and a directional mechanism, and a flex housing integral with the drilling assembly.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: February 4, 2014
    Assignee: Smith International, Inc.
    Inventors: Lance D. Underwood, Charles H. Dewey
  • Patent number: 8584776
    Abstract: Methods, systems, and tool assemblies for distributing weight between a bit and a reamer device are disclosed. For example, at least one of the drill bit and the reamer may be configured to selectively distribute a weight-on-bit between the drill bit and the reamer, such as within a predetermined range. Additionally, methods of drilling wellbores may include selectively distributing a weight-on-bit applied to a bottom hole assembly between a drill bit and a reamer of the bottom hole assembly. Also, a reamer may be configured to exhibit a first maximum rate-of-penetration into a relatively hard formation, and a drill bit may be configured to exhibit a second maximum rate-of-penetration into a relatively soft formation that is less than the first maximum rate-of-penetration.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: November 19, 2013
    Assignee: Baker Hughes Incorporated
    Inventors: Steven R. Radford, Mark E. Anderson, William C. Thompson, Jim R. Powers
  • Patent number: 8579050
    Abstract: A reamer bit for use in earth boring operations comprising a body, four cutter mounts, rolling cutters on each mount, and cutting elements disposed on each cutter arranged so adjacent cutting swaths formed by the bit are created by cutting elements on cones of oppositely disposed cutter mounts. The swaths are generally curvilinear, wherein the outermost swaths are formed by cutting element rows on the outer portion of the cutters. The reamer bit can further comprise a pilot bit.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: November 12, 2013
    Assignee: Baker Hughes Incorporated
    Inventors: Rudolf Carl Pessier, Scott Allan Young, Robert J. Buske, Mark Phillip Blackman, Gregory L. Ricks
  • Patent number: 8573331
    Abstract: In one aspect of the invention a rotary mine roof drilling apparatus has an arm attached to and intermediate a drill bit and a platform. The apparatus also has a thrusting mechanism adapted to push the drill bit into a mine roof. The drill bit has a bit body intermediate a shank and a working surface. The working surface has a cutting element with a carbide substrate bonded to a diamond working end with a pointed geometry; and the diamond working end has a 0.050-0.200 inch apex radius.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: November 5, 2013
    Inventors: David R. Hall, Ronald Crockett
  • Patent number: 8550190
    Abstract: In one aspect of the present invention, a drill bit assembly for downhole drilling comprises an outer bit comprising a central axis and an outer cutting area and an inner bit disposed within the outer bit and comprising an inner cutting area. The outer bit comprises a first plurality of cutting elements and the inner bit comprises a second plurality of cutting elements wherein an average distance of each cutting element in the first plurality to the central axis forms a first moment arm and an average distance of each cutting element in the second plurality to the central axis forms a second moment arm. A ratio of the inner cutting area to the outer cutting area is substantially equal to a ratio of the outer moment arm to the inner moment arm.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: October 8, 2013
    Inventors: David R. Hall, Francis Leany, Casey Webb, Marcus Skeem
  • Patent number: 8528661
    Abstract: A drill bit made according to one embodiment includes a first member including one of a magnet and a coil, and a second member that moves relative to the first member, the second member including the other of the magnet and the coil, wherein the relative motion causes the generation of an electrical charge in the coil.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: September 10, 2013
    Assignee: Baker Hughes Incorporated
    Inventors: Suresh G. Patel, Clifton N. B. Triplett
  • Publication number: 20130213717
    Abstract: A wet drill bit assembly and a dry drill bit assembly for cutting a borehole in the earth strata of a mine wherein the borehole has a reduced dimension interior region and an enlarged dimension exterior region. The wet drill bit assembly includes an axial forward spade-style cutting member, which has a spade hard cutting member with a first transverse cutting dimension, and an axially spaced apart axial rearward reamer cutting member, which has a hard insert with a second transverse cutting dimension, which is greater than the first transverse cutting dimension. The dry drill bit assembly includes an axial forward cutting member, which has an axial forward hard cutting insert with a first transverse cutting dimension, and an axially spaced apart axial rearward hard cutting insert that has a second transverse cutting dimension which is greater than the first transverse cutting dimension. An elongate sleeve is adapted to receive cutting debris from the operation of the axial forward hard cutting insert.
    Type: Application
    Filed: January 24, 2013
    Publication date: August 22, 2013
    Applicant: Kennametal Inc.
    Inventor: Kennametal Inc.
  • Patent number: 8499834
    Abstract: A milling tool which includes a nose cutting portion, a cutting section having a plurality of hardened cutters and a shaft portion. A wear pad is disposed on the cutting section and shaft portion. Upon the shaft portion, the wear pad extends radially outwardly to an engagement diameter that exceeds the maximum cutting diameter of the cutters.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: August 6, 2013
    Assignee: Baker Hughes Incorporated
    Inventors: Christopher W. Guidry, Guruswami Navin, Lambertus C. F. Joppe, Andrew D. Ponder, Calvin Stowe
  • Patent number: 8499857
    Abstract: A drilling apparatus which includes a drill bit attachable to the drilling end of a drill string, the drill bit including a bit body being attached to a shank and having a working face with at least one cutting element. The drilling apparatus also includes a jack element positioned within a bore of the bit body having a working tip substantially protruding from the working face, and which jack element is also adapted to move with respect to the bit body. One or more position feedback sensors are positioned proximate the jack element and are adapted to detect the axial and/or angular position of the jack element with respect to the bit body.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: August 6, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, David Lundgreen, Jim Shumway, Nathan Nelson, Daryl Wise, Paula Turner
  • Patent number: 8448721
    Abstract: A directional drilling system comprises a main drill bit 24 rotatable about a main bit axis 26, a pilot drill bit 34 rotatable about a pilot bit axis 36 substantially parallel to the main bit axis 26, and adjustment means 28 for adjusting the position of the pilot bit axis 36 relative to the main bit axis 26.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: May 28, 2013
    Assignee: Schlumberger Technology Corporation
    Inventor: Ashley Johnson
  • Patent number: 8439131
    Abstract: A drill bit assembly comprising a bit body connectable to a tubular drill string, and provided with a longitudinal passageway for an operating tool; an externally removable closure element for closing the passageway for the operating tool; and a passage tool attached to or connectable to the closure element in its closing position, wherein the passage tool comprises a lower part to which the closure element is attached or connectable, which lower part is arranged so that it can be moved out of the bit body together with the closure element, and an upper tubular part which is arranged so that it can be moved along the passageway in the bit body, the upper tubular part forming a passage with a downstream opening for the operating tool when the lower part of the passage tool has been moved out of the bit body.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: May 14, 2013
    Assignee: Schlumberger Technology Corporation
    Inventor: Douwe Johannes Runia
  • Publication number: 20130081877
    Abstract: A system and method for boring a hole in rock with a digger derrick; which utilizes a hollow stem auger, a kelly bar, and a core barrel with a top support member with a hole therein for receiving the kelly bar with a detachable central pilot bit thereon which is translatable up and down with respect to the core barrel as the kelly bar and auger are manipulated. The kelly bar is selectively positionable with respect to the auger so as to allow the ability to retract the pilot bit inward into the core barrel and to shorten the separation between the pilot bit and the auger.
    Type: Application
    Filed: September 28, 2012
    Publication date: April 4, 2013
    Applicant: TEREX USA, LLC
    Inventor: TEREX USA, LLC
  • Patent number: 8360174
    Abstract: A drilling assembly comprises a drill bit that includes a bit body intermediate a working face and a shank. An indenting member adapted to guide the drill bit protrudes from the working face. A flexible portion is disposed above the bit body.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: January 29, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, Paula Turner, David Lundgreen, Scott Woolston
  • Patent number: 8307921
    Abstract: Drilling apparatus comprises: a body; a pilot hole-drilling assembly (14) mounted to the body for drilling a pilot hole of a first diameter; and a hole-opening assembly (16) mounted to the body for opening the pilot hole to a larger second diameter. The apparatus is configured such that the pilot hole-drilling assembly (14) will drill at a faster rate than the hole-opening assembly (16) for a given unit loading. As the pilot hole-drilling assembly (14) has the capability to drill at a faster rate than the hole-opening assembly (16), the pilot hole-drilling assembly will tend to experience relatively low weight-on-bit (WOB). The pilot hole-drilling assembly (14) will thus tend to maintain a vertical orientation. The hole-opening assembly (16) will follow the path of the pilot hole, while opening the hole to the required diameter.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: November 13, 2012
    Assignee: National Oilwell Varco, L.P.
    Inventor: Alan Martyn Eddison
  • Patent number: 8281882
    Abstract: A drill bit has an axis of rotation and a working face with a plurality of blades extending outwardly from a bit body. The blades form, in part, an inverted conical region, and a plurality of cutters with a cutting surface is arrayed along the blades. A jack element is coaxial with the axis of rotation and extends within the inverted conical region within a range defined by the cutting surface of at least one cutter.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: October 9, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, Francis E. Leany, Joe Fox, Tyson J. Wilde
  • Publication number: 20120222864
    Abstract: A completion arrangement and methods of using the completion arrangement are described herein. The completion section includes a completion section and impacting formations. The completion section is arranged to be coupled to production tubing, and has means to allow hydrocarbons to pass therein from reservoir rock in which the wellbore is formed. The impacting formations are drivingly moveable relative to the wellbore. The means being arranged to serve as flushing portals, whereby drilling fluid introduced into the production tubing is arranged to flow via the means into a space between the production tubing and the wellbore, and circulate in the space and the impacting formations. One, or both, of the drilling fluid circulating in the space and the impacting formations are arranged to remove obstructing material and formations from the wellbore for return to surface by way of the space, during insertion of the completion arrangement into the wellbore.
    Type: Application
    Filed: November 6, 2008
    Publication date: September 6, 2012
    Inventors: Sam Simonian, Colin Boyle, Neale Carter
  • Patent number: 8225887
    Abstract: A casing bit, which may comprise a composite structure, for drilling a casing section into a subterranean formation, and which may include a portion configured to be drilled therethrough. Cutting elements and methods of use may be included. Adhesive, solder, electrically disbonding material, and braze affixation of a cutting element may be included. Differing abrasive material amount, characteristics, and size of cutting elements may be included. Telescoping casing sections and bits may be included. Embodiments may include: at least one gage section extending from the nose portion, at least one rotationally trailing groove formed in at least one of the plurality of blades, a movable blade, a leading face comprising superabrasive material, at least one of a drilling fluid nozzle and a sleeve, grooves for preferential failure, at least one rolling cone affixed to the nose portion, at least one sensor, discrete cutting element retention structures, and percussion inserts.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: July 24, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Evan C. Turner, Mark W. Dykstra, Eric C. Sullivan
  • Patent number: 8225888
    Abstract: A casing bit, which may comprise a composite structure, for drilling a casing section into a subterranean formation, and which may include a portion configured to be drilled therethrough. Cutting elements and methods of use may be included. Adhesive, solder, electrically disbonding material, and braze affixation of a cutting element may be included. Differing abrasive material amount, characteristics, and size of cutting elements may be included. Telescoping casing sections and bits may be included. Embodiments may include: at least one gage section extending from the nose portion, at least one rotationally trailing groove formed in at least one of the plurality of blades, a movable blade, a leading face comprising superabrasive material, at least one of a drilling fluid nozzle and a sleeve, grooves for preferential failure, at least one rolling cone affixed to the nose portion, at least one sensor, discrete cutting element retention structures, and percussion inserts.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: July 24, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Evan C. Turner, Mark W. Dykstra, Eric C. Sullivan
  • Patent number: 8205693
    Abstract: A casing bit, which may comprise a composite structure, for drilling a casing section into a subterranean formation, and which may include a portion configured to be drilled therethrough. Cutting elements and methods of use may be included. Adhesive, solder, electrically disbonding material, and braze affixation of a cutting element may be included. Differing abrasive material amount, characteristics, and size of cutting elements may be included. Telescoping casing sections and bits may be included. Embodiments may include: at least one gage section extending from the nose portion, at least one rotationally trailing groove formed in at least one of the plurality of blades, a movable blade, a leading face comprising superabrasive material, at least one of a drilling fluid nozzle and a sleeve, grooves for preferential failure, at least one rolling cone affixed to the nose portion, at least one sensor, discrete cutting element retention structures, and percussion inserts.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: June 26, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Evan C. Turner, Mark W. Dykstra, Eric C. Sullivan
  • Publication number: 20120073877
    Abstract: Taught is an auger having a working head (15), a ratcheting T-handle (50), and a shaft (20) attached there between forming a hand-powered ratcheting auger for drilling holes near the ground surface. Shaft (20) may include one or more lengths of extension shaft parts to control the length of the shaft. Working head (15) contains a drill-bit (14), semi-circular non-planar cutting blades (12), a working head shaft part (22), with the drill-bit and cutting blades fixedly attached to the working head shaft part and shaft part (22) detachably attached to shaft (20). The auger may also include an air induction unit 66 including an air-receiving opening in the T-shaped handle; an air-line 60 positioned within a hollow of the shaft connecting the air-receiving opening with air exhaust openings so as a jet of the air can blow out of said auger to break up and blow away the drilling detritus.
    Type: Application
    Filed: September 27, 2011
    Publication date: March 29, 2012
    Inventors: Anthony K. Jakubczak, Christopher Schifferli, Brent L. Miller, Andrew R. Janik
  • Publication number: 20120055712
    Abstract: An apparatus for drilling a wellbore (10) is disclosed, the apparatus comprising a lowermost pilot drill bit (16) having a diameter less than that of the diameter of wellbore (12) drilled by the apparatus, above which is a reamer, having an adjustable drill diameter from a first diameter less than that of the pilot drill to a second diameter greater than that of the pilot drill, above which is a body portion (24) having a lower diameter less than that of the pilot drill and an upper diameter greater than that of the pilot' drill but less than the second diameter of the reamer.
    Type: Application
    Filed: December 19, 2008
    Publication date: March 8, 2012
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Benjamin Peter Jeffryes, Ashley Bernard Johnson
  • Publication number: 20120043135
    Abstract: A method of forming a supported subterranean well bore in which, in one disclosed embodiment, a first drill bit is mounted on a first string of casing tubulars via a steerable tool, and the drill bit is used to form a first bore. Upon reaching the required depth the casing string is cemented in place to support the formed bore and a second drill bit is mounted on a second casing string and is inserted into the first casing string. The second drill bit is used to drill through the wall of the first casing string and proceed to form a second, deeper bore. Once the second drill bit has reached the required depth, the second casing string is cemented in place to support the second bore.
    Type: Application
    Filed: October 31, 2011
    Publication date: February 23, 2012
    Applicant: Technology Ventures International Limited
    Inventors: James A. Hewson, Philip M. Burge, Gregory G. Galloway, David J. Brunnert
  • Publication number: 20120031677
    Abstract: A directional drilling apparatus include a first cutter that substantially cuts a wellbore bottom along a first axis and a second cutter that cuts the wellbore bottom along a second axis different from the first axis. The second cutter may extend an adjustable amount out of the first cutter. In another embodiment, a pilot string may connect the second cutter to the first cutter.
    Type: Application
    Filed: August 2, 2011
    Publication date: February 9, 2012
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Philip Christof Schulte, Hans Robert Oppelaar, Michael Koppe
  • Patent number: 8074741
    Abstract: Reamer bits have cutters with different effective back rake angles. Drilling systems include a pilot bit and a reamer bit, wherein cutters in shoulder regions of the reamer bit have a greater average effective back rake angle than cutters in shoulder regions of the pilot bit. Methods of drilling wellbores include drilling a bore with a pilot bit, and reaming the bore with a reamer bit having cutters in shoulder regions of the reamer bit that have an average effective back rake angle greater than that of cutters in shoulder regions of the pilot bit. Methods of forming drilling systems include attaching pilot and reamer bits to a drill string, and positioning cutters in shoulder regions of the reamer bit to have an average effective back rake angle greater than that of cutters in shoulder regions of the pilot bit.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: December 13, 2011
    Assignee: Baker Hughes Incorporated
    Inventor: Matthias Meister
  • Patent number: 8042625
    Abstract: A drilling tool has a body with a main drilling region and a pilot drilling region, eccentric to the main drilling region. The main drilling region has main blades and the pilot drilling region has pilot blades. The main drilling region has a main pass-through diameter, centered upon a first axis, one of the main blades extending to the main pass-through diameter, the pilot region having a pilot gauge diameter, centered upon a second axis of rotation at least one of the pilot blades extending to the pilot gauge diameter, wherein part of a circle of diameter equal to the pilot gauge diameter and centered upon the second axis of rotation extends outside of a circle of diameter equal to the main pass-through diameter and centered upon the first axis.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: October 25, 2011
    Assignee: National Oilwell Varco, L.P.
    Inventors: Ridha Chafai, James Edward Wallace
  • Patent number: 8037950
    Abstract: A particle impact drilling system and method are described. In several exemplary embodiments, the system and method may be a part of, and/or used with, an apparatus or system, methods, to excavate a subterranean formation. The system can including, for example, removing near-borehole damage, casing, window milling, fishing, drilling with casing, under reaming, coring, perforating, effective circulatory density management, assisted annular flow, and directional control. Embodiments of associated systems and methods are also included.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: October 18, 2011
    Assignee: PDTI Holdings, LLC
    Inventors: Gordon A. Tibbitts, Greg Galloway, Adrian Vuyk, Jr., James Terry
  • Patent number: 8006785
    Abstract: A casing bit, which may comprise a composite structure, for drilling a casing section into a subterranean formation, and which may include a portion configured to be drilled therethrough, is disclosed. Cutting elements and methods of use are disclosed. Adhesive, solder, electrically disbonding material, and braze affixation of a cutting element are disclosed. Differing abrasive material amount, characteristics, and size of cutting elements are disclosed. Telescoping casing sections and bits are disclosed. Aspects and embodiments are disclosed including: at least one gage section extending from a nose portion, at least one rotationally trailing groove formed in at least one of the plurality of blades, a movable blade, a leading face comprising superabrasive material, at least one of a drilling fluid nozzle and a sleeve, grooves for preferential failure, at least one rolling cone affixed to the nose portion, at least one sensor, discrete cutting element retention structures, and percussion inserts.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: August 30, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Jack T. Oldham, L. Allen Sinor, Eric E. McClain, Robert A. Laing, Evan C. Turner, Mark W. Dykstra, Eric C. Sullivan
  • Patent number: 7992658
    Abstract: A reamer for subterranean wellbores may include a composite framework, which may include one or more high strength stems, each having one or more reamer bodies coupled thereto. The body may include a plurality of plates coupled together and may include additional components formed integrally therewith or coupled thereto. A method of forming a reaming tool may include forming a high strength stem and a reamer body and coupling the body to the stem. A method of using the reaming tool may include coupling one or more bodies in a drill string and reaming a wellbore.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: August 9, 2011
    Assignee: Baker Hughes Incorporated
    Inventor: Robert J. Buske
  • Publication number: 20110168448
    Abstract: The drilling of a casing bit and any other equipment in the casing with another casing bit where at least two casing bits of different diameter and having associated casing sections may be assembled to form a drilling assembly for drilling subterranean formations, the at least two casing bits and casing sections are arranged in a telescoping relationship.
    Type: Application
    Filed: August 28, 2008
    Publication date: July 14, 2011
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Eric E. McClain, John C. Thomas
  • Patent number: 7967083
    Abstract: A drill string having a drill bit with a bit body located between a shank and a working face. The working face has at least one cutting element and a jack element disposed partially within the drill bit body and partially protruding from the working face. The jack element is adapted to be rotated with respect to the bit body by a driving mechanism disposed within a bore of the drill string. A generator or motor with a rotor is incorporated into a torque transmitting mechanism that links the driving mechanism to the jack element, and configured so that at least one waveform is produced in the generator or motor when the jack element is rotated. The waveform is processed by an electronic processing device to determine the rotational position of the jack element.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: June 28, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, Jim Shumway, David Wahlquist
  • Publication number: 20110100714
    Abstract: An apparatus for engaging a subterranean borehole includes a bi-center bit having backup cutting elements thereon. The bi-center bit includes a pilot bit section and a reamer bit section adjacent to the pilot bit section. The pilot bit section includes at least one primary cutting element and at least one backup cutting element rotationally trailing and laterally offset from the at least one primary cutting element. Methods of drilling a subterranean borehole include engaging a first portion of a borehole with a reamer bit section of a drill bit and simultaneously engaging a second, opposing portion of the borehole with a pilot bit section adjacent to the reamer bit section.
    Type: Application
    Filed: October 29, 2009
    Publication date: May 5, 2011
    Inventors: William A. Moss, David L. Rickabaugh, Mark E. Anderson
  • Publication number: 20110005841
    Abstract: An apparatus for reaming or enlarging a borehole comprising a bi-center drill bit having backup cutters thereon.
    Type: Application
    Filed: July 7, 2009
    Publication date: January 13, 2011
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Matthew S. Wood, James O. Sinkinson
  • Patent number: 7861802
    Abstract: A bottom hole assembly to directionally drill a subterranean formation includes a drill bit, a stabilizer assembly located proximate to and behind the drill bit, a drilling assembly comprising a drive mechanism and a directional mechanism, and a flex member. Optionally, the flex member may be located between the drilling assembly and the stabilizer assembly or an integral to a housing of the drilling assembly. A method to drill a formation includes positioning a stabilizer assembly behind a drill bit and positioning a flex member between an output shaft of a drilling assembly and the stabilizer assembly. The method preferably includes rotating the drill bit, stabilizer assembly, and flex member with a drilling assembly and directing the trajectory of the drill bit and stabilizer assembly with a directional mechanism of the drilling assembly.
    Type: Grant
    Filed: January 18, 2006
    Date of Patent: January 4, 2011
    Assignee: Smith International, Inc.
    Inventors: Lance D. Underwood, Charles H. Dewey
  • Patent number: 7845437
    Abstract: An improved hole opener assembly for horizontal drilling is disclosed that is less prone to failure as a result of cone arm break out or pocket side wall fracture. The interface between the cone arm and the pocket employs a key and slot configuration with a tighter fit than between the arm and the pocket to reduce the stress on the pocket side wall during drilling.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: December 7, 2010
    Assignee: Century Products, Inc.
    Inventors: Todd Bielawa, James Schulz
  • Publication number: 20100300757
    Abstract: A compression enlarging driller comprises a vehicle body; a pole; an outer drilling rod; an inner drilling rod disposed within the outer drilling rod and moveable in a longitudinal direction; a windlass; a connecting lever having an upper end connected with a lower end of the inner drilling rod; a rotary digging bucket connected with a lower end of the connecting lever; a rotary enlarging device; a driving device; and a first hydraulic cylinder. When the driller bores a hoe, it can bore and enlarge the hole without changing a drill bit. A pile constructed by the driller has a high bearing capacity, the number of required piles is decreased, costs lower, and efficiency is improved.
    Type: Application
    Filed: March 1, 2007
    Publication date: December 2, 2010
    Inventor: Dexin He
  • Patent number: 7814991
    Abstract: A method and apparatus for drilling a subterranean formation or material utilizing a drilling apparatus which includes a drill string having a leading end and a trailing end and having a bottom hole assembly connected with the leading end. The bottom hole assembly includes a drill bit and an externally threaded screw section. In operation, the drill bit is rotated, forming material cuttings and an opening in the subterranean formation, and the threaded screw section is rotated within the opening, forming a helical groove in the subterranean formation.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: October 19, 2010
    Assignee: Gas Technology Institute
    Inventors: Hamid A Abbasi, Iraj Salehi, Kent Perry
  • Patent number: 7779938
    Abstract: The invention includes a pair of swivels for use with an auger boring machine. One of the swivels allows for rotation of a first auger of a first auger assembly connected to the trailing end of a pilot tube without rotating the pilot tube. The other swivel allows for rotation of a larger diameter second auger connected to the trailing end of the first auger assembly without rotating the first auger. Each of the swivels includes a thrust bearing.
    Type: Grant
    Filed: March 7, 2007
    Date of Patent: August 24, 2010
    Inventor: James S. Barbera
  • Patent number: 7775303
    Abstract: An apparatus for a drilling tool includes a pilot drilling bit, a reamer, and a pilot body which is disposed to support the reamer and the pilot drilling bit at the end of a casing tube. The reamer includes a closed position in which the parts of the tool are concentric with one another and displaceable through the casing tube, and an open position in which at least a part of the reamer is located radially outside the casing tube. The pilot body includes a male portion which extends through the reamer, the male portion of the pilot body forming a cam surface for transferring rotation energy to the reamer and for switching the reamer between the closed and open positions, and the male portion of the pilot body being insertable in a recess in the pilot drilling bit.
    Type: Grant
    Filed: April 6, 2005
    Date of Patent: August 17, 2010
    Inventor: Ove Göting
  • Publication number: 20100193248
    Abstract: Methods, systems, and tool assemblies for distributing weight between a bit and a reamer device are disclosed. For example, at least one of the drill bit and the reamer may be configured to selectively distribute a weight-on-bit between the drill bit and the reamer, such as within a predetermined range. Additionally, methods of drilling wellbores may include selectively distributing a weight-on-bit applied to a bottom hole assembly between a drill bit and a reamer of the bottom hole assembly. Also, a reamer may be configured to exhibit a first maximum rate-of-penetration into a relatively hard formation, and a drill bit may be configured to exhibit a second maximum rate-of-penetration into a relatively soft formation that is less than the first maximum rate-of-penetration.
    Type: Application
    Filed: January 29, 2010
    Publication date: August 5, 2010
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Steven R. Radford, Mark E. Anderson, William C. Thompson, Jim R. Powers