Rotation Of Bit Actuates Lubricant Feed Means Patents (Class 175/229)
  • Patent number: 8865309
    Abstract: The present invention includes compositions and methods of supplying a corrosion inhibitor including placing a corrosion inhibitor attached to a nanostructure carrier, placing the nanostructure carrier containing the corrosion inhibitor at a location and the nanostructure carrier is capable of releasing the corrosion inhibitor.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: October 21, 2014
    Assignee: National Oilwell Varco, L.P.
    Inventors: Deepthi R. Setlur, Stefan M. Butuc
  • Publication number: 20130220704
    Abstract: The present disclosure relates to greases containing metal sulfonate thickeners. In one example the thickener may be a calcium sulfonate thickener. In other examples grease may contain a combination of a metal sulfonate thickener and another thickener, such as a metal complex soap grease, detergent, or non-soap thickener. The grease may be formulated to meet specific performance criteria relevant to lubrication of a roller cone drill bit in downhole conditions. The disclosure also relates to a roller cone drill bit containing a grease of the disclosure.
    Type: Application
    Filed: April 5, 2013
    Publication date: August 29, 2013
    Inventors: David P. Duckworth, Ping C. Sui, Liwen Wei
  • Patent number: 8383559
    Abstract: The present invention includes compositions and methods of supplying a corrosion inhibitor including placing a corrosion inhibitor attached to a nanostructure carrier, placing the nanostructure carrier containing the corrosion inhibitor at a location and the nanostructure carrier is capable of releasing the corrosion inhibitor.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: February 26, 2013
    Assignee: National Oilwell Varco, L.P.
    Inventors: Deepthi R. Setlur, Stefan M. Butuc
  • Patent number: 8141662
    Abstract: What is claimed is a downhole lubrication system comprising a drill string component comprising an outer diameter and an inner bore. A reservoir may be disposed intermediate the outer diameter and inner bore. A piston may be disposed at least partially within the reservoir. At least one channel may extend from the reservoir to a bearing surface. As drilling fluid is passed through the inner bore, the piston may be pressurized, urging lubricant toward the bearing surface via the at least one channel.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: March 27, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: David R. Hall, Francis Leany, Michael Beazer, Casey Webb
  • Publication number: 20110017514
    Abstract: Roller cone drill bits may be provided with pressure relief mechanisms operable to control lubricant pressure within respective lubricant systems. Each lubricant system may be enclosed and isolated from downhole well fluids. Portions of each pressure relief mechanism may be completely surrounded by lubricant to increase downhole life of associated operating mechanisms and to produced more repeatable and more reliable opening and closing of the pressure relief mechanism. The downhole drilling life of bearing surfaces, fluid seals and other supporting structures associated with roller cones mounted on support arms of such roller cone drill bits may be substantially increased. Each pressure relief mechanism may be locked in a closed position to assist with filling the respective lubricant system with lubricant.
    Type: Application
    Filed: July 7, 2010
    Publication date: January 27, 2011
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventor: Seth Garrett Anderele
  • Patent number: 7363734
    Abstract: The invention relates to a trench wall cutter comprising a bearing shield, on which at least one cutting wheel is supported in a rotatable manner. Between the cutting wheel and the bearing shield at least one sealing member is provided. For the lubrication of the sealing member a lubricating device is provided, which has a lubricant inlet port arranged above the cutting wheel.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: April 29, 2008
    Assignee: Bauer Maschinen GmbH
    Inventors: Maximilian Arzberger, Ignaz Seitle
  • Publication number: 20080041627
    Abstract: A lubricating nutating single cone drill bit 10 is disclosed. Bit 10 includes bit shank 12 with an axially skewed journal 18 rotatably retaining cutter body 22. Bearings (26, 28, 30, 32) can enable rotation of the cutter body 22. Lubricant is dispensed to a gap between the axially skewed journal 18 and cutter body 22 from lubricant chamber 76 having plunger 80 acted on by an annulus fluid, the gap bounded by first 66 and second 68 radial dynamic seals. A fluid passage 90 extending through the bit 10 is in communication with fluid inlet port 88 on the proximal end 16 of the bit shank 12. Fluid passage 90 is in further communication with a first fluid outlet port 98 on the distal end 36 of the axially skewed journal 18 and with a second fluid outlet port 94 formed on a lateral portion of bit shank 12.
    Type: Application
    Filed: August 18, 2006
    Publication date: February 21, 2008
    Inventor: Allen Kent Rives
  • Patent number: 6460635
    Abstract: A load responsive hydrodynamic bearing is provided in the form of a thrust bearing or journal bearing for supporting, guiding and lubricating a relatively rotatable member to minimize wear thereof responsive to relative rotation under severe load. In the space between spaced relatively rotatable members and in the presence of a liquid or grease lubricant, one or more continuous ring shaped integral generally circular bearing bodies each define at least one dynamic surface and a plurality of support regions. Each of the support regions defines a static surface which is oriented in generally opposed relation with the dynamic surface for contact with one of the relatively rotatable members. A plurality of flexing regions are defined by the generally circular body of the bearing and are integral with and located between adjacent support regions.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: October 8, 2002
    Assignee: Kalsi Engineering, Inc.
    Inventors: Manmohan S. Kalsi, Dezso Somogyi, Lannie L. Dietle
  • Patent number: 5927439
    Abstract: A lubricating sub-assembly for a rock drill, comprising a housing coupled into a drill string carrying a drill bit at its front end, a cavity disposed within the housing for holding a predetermined amount of a bearing lubricant, passages for communicating the interior of the cavity with one or more air circulation passages provided in the bit leading to bearings within the drill bit, and a valve mechanism for dispensing a preset amount of lubricant from the cavity to the communicating means passages.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: July 27, 1999
    Inventor: David Thomas Hanns
  • Patent number: 5628375
    Abstract: A rolling cutter drill bit comprises a main body and three depending legs, each leg having a cantilevered bearing spindle on which a rolling cutter is rotatably mounted. Bearings located between the cutter and spindle include a radial bearing, and a thrust bearing configured to carry onward thrust loads from the cutter onto the spindle. A bearing seal defines an enclosed region between the cutter and the spindle in which the bearings are located, and a pressure balanced lubricant delivery system within the spindle delivers lubricant to the bearings. The lubricant delivery system includes a non-return valve to allow lubricant to flow into the area of the enclosed region containing the thrust bearing and the area is bounded by a tortuous flow path which allows a more restricted flow of lubricant out of the thrust bearing area and into another area of the enclosed region, without pressurizing the bearing seal.
    Type: Grant
    Filed: August 29, 1995
    Date of Patent: May 13, 1997
    Assignee: Camco International Inc.
    Inventor: Jeffery E. Daly
  • Patent number: 5337843
    Abstract: A hole opener used in conjunction with drilling in at least one of boulder and rubble stone formations includes first and second sets of cutters. Each of the cutters of the first and second sets of cutters has cutter teeth thereon and further include a shaft. The hole opener also includes a tubular carrier body, a first device for fixing the first set of cutters to the tubular carrier body so that the first set of cutters is positioned in a common first lateral plane with respect to a longitudinal axis of the tubular carrier body, and second device for fixing the second set of cutters to the tubular carrier body so that the second set of cutters is located in a second lateral plane with respect to the longitudinal axis of the tubular carrier body and at an axial distance from the first set of cutters along the longitudinal axis.
    Type: Grant
    Filed: February 17, 1993
    Date of Patent: August 16, 1994
    Assignee: Kverneland Klepp AS
    Inventors: Tor Torgrimsen, Kjell-Egil Stangeland, Arnold Furre
  • Patent number: 5183123
    Abstract: In order to detect when a lubricant is nearly depleted in a lubricant reservoir provided in a sealed rotary cutter rock drill bit, compressed air used for removal of cuttings is passed through a valve in the reservoir. As the lubricant is used up a compressed spring gradually extends. In one embodiment, eventually a vent hole in the valve is opened causing a large pressure drop signifying an empty condition of the reservoir. In another embodiment, the valve is closed when the lubricant is depleted, giving rise to a sudden rise in pressure also signifying an empty condition.
    Type: Grant
    Filed: December 26, 1991
    Date of Patent: February 2, 1993
    Assignee: Western Rock Bit Company Limited
    Inventor: Kenneth M. White
  • Patent number: 5099932
    Abstract: The present invention provides a lubricant circulation system for a rock drill bit which circulates a flow of lubricant over the bit bearing surfaces to keep the bearings optimally lubricated and free to particulate contaminants from the drilling process. A lubricant pumping assembly, including a pair of nested gerotor pump elements is attached to either the drill bit cutting element or support structures so that one of the gerotors is driven by rotation of the bit cutting element or related structures and the other gerotor rotates freely. The gerotors have a corresponding tooth and recess configuration that pulls lubricant from the lubricant supply under positive pressure into a variable sized cavity formed as the gerotors rotate relative to each other and then forces lubricant to the bearing surfaces. Lubricant may optionally be pumped back to the lubricant supply with continued rotation of the gerotors or out of the journal area with the drilling cuttings for return to the surface.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: March 31, 1992
    Assignee: Cummins Engine Company, Inc.
    Inventor: Charles E. Hixon
  • Patent number: 4765205
    Abstract: A method for assembling earth drill bits starts with a hollow shank body with a hollow pin with API regulation threads, for connection to a drill pipe, extending from one side, and hollow nozzle legs extending from the other side cast as a one piece investment casting. Separate leg members are rough formed and machined to shape having a bit body portion, depending leg, and inwardly and downwardly extending bearing journal. Conical roller cutters are supported for rotation on the bearing journals. A passage formed through the bit body portion and depending leg provides for lubrication of the conical roller cutters. The conical roller cutters are secured in place by a liquid lock formed by filling a cavity between the interior of the cutter cone and the journal bearing which is filled with liquid and sealed.
    Type: Grant
    Filed: June 1, 1987
    Date of Patent: August 23, 1988
    Inventor: Bob Higdon
  • Patent number: 4727943
    Abstract: A drill bit for drilling into earth formations comprising a plurality of sections having connection means to connect said sections to form a unitary drill bit; means in said plurality of sections for storing and delivering lubricants to the cutting cones; and wear bar segments on said plurality of sections to form continuous wear bars about the periphery of said unitary drill bit thus reducing the wear on said unitary drill bit.
    Type: Grant
    Filed: January 15, 1987
    Date of Patent: March 1, 1988
    Inventor: Roy W. Wood
  • Patent number: 4657091
    Abstract: There is disclosed a drill bit which is connectable to the lower end of a rotary drill string for use in drilling oil and gas wells as drilling mud is circulated downward through the string, out the bit, and upwardly within the annulus between the string and well bore so as to remove cuttings therefrom. The bit has cones which are mounted for rotation about thrust bearings which extend inwardly from the lower ends of legs which depend from a shank at the upper end of the bit body which is attached to the drill string.
    Type: Grant
    Filed: May 6, 1985
    Date of Patent: April 14, 1987
    Inventor: Robert Higdon
  • Patent number: 4501338
    Abstract: A positive displacement grease pump apparatus is disclosed to circulate a lubricating grease from a grease reservoir system, formed within a body of a sealed bearing rotary cone rock bit. The relatively viscous grease is positively circulated to and from the reservoir through bearings defined between a rotary cone and its respective journal bearing extending from the rock bit body.
    Type: Grant
    Filed: August 8, 1983
    Date of Patent: February 26, 1985
    Assignee: Smith International, Inc.
    Inventor: Lance D. Underwood
  • Patent number: 4452323
    Abstract: A valve system is disclosed for use in the lubrication passages of a rolling cutter drill bit, which valve assembly utilizes one or more reed valves to maintain flow of lubricant in a desirable direction.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: June 5, 1984
    Assignee: Reed Rock Bit Company
    Inventor: Jeffery E. Daly
  • Patent number: 4446933
    Abstract: A drilling bit for drilling earthen material such as an oilwell rotary cone drilling bit which includes means for centrifugally providing lubricant to the drill bit cone bearing from a storage cavity. A storage cavity is provided for lubricant for the drill bit bearings, means being provided for forcing the lubricant from this cavity through channels to such bearings in response to the centrifugal force generated with the rotation of the bit.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: May 8, 1984
    Inventor: Albert G. Bodine
  • Patent number: 4412590
    Abstract: A rolling cutter rock drilling bit is disclosed which features an internal lubricant pump utilizing an internal elastomeric member moving across a grooved rigid surface to circulate lubricant in the bit bearings as a result of the shear forces on the lubricant created when the elastomer moves across the grooves.
    Type: Grant
    Filed: January 23, 1981
    Date of Patent: November 1, 1983
    Assignee: Reed Rock Bit Company
    Inventor: Jeffery E. Daly
  • Patent number: 4390072
    Abstract: Discloses a lubricant circulating system for a rotary drilling bit including a lubricating space defined between a rotary cone cutter and a journal shaft extending from the bit body, the body defining a lubricant supply passageway connecting the lubricating space with a substantially cylindrical inlet chamber of a lubricant reservoir and with the centerline of the supply passageway being disposed substantially tangential with the cylindrical wall of said inlet chamber to form a restrictive vortex flow passage from the supply passageway into said reservoir and a nonrestrictive return flow passage, the body defining a lubricant exhaust passageway connecting the lubricating space through a substantially cylindrical outlet chamber into a discharge passageway forming part of the reservoir and with the centerline of the discharge passageway being disposed substantially tangential with the cylindrical wall of the outlet chamber to form a restrictive vortex flow passage from the reservoir into the outlet chamber and
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: June 28, 1983
    Assignee: Globe Oil Tools, Inc.
    Inventor: Charles M. Phelan
  • Patent number: 4383577
    Abstract: A rotating head assembly having roller thrust bearings rotatably journaling an inner barrel is provided with pump means for continuous forced circulation of lubricating oil to, and around, the thrust bearings during operation. A lubricating oil chamber substantially surrounds the bearings, which chamber is effectively sealed against leakage of oil fluids, and other debris, into the chamber and lubricating oil out of the chamber. The lower end of the rotatably journaled inner barrel is provided with a stripper rubber structured to enable use of the head with drill pipe of diverse outer diameters.
    Type: Grant
    Filed: February 10, 1981
    Date of Patent: May 17, 1983
    Inventor: Alfred B. Pruitt
  • Patent number: 4381824
    Abstract: A lubrication system is disclosed for a rolling cutter drill bit, which system utilizes solid or semi-solid sticks of lubricants located in internal channels and continuously biased against rotating surfaces in the bit.
    Type: Grant
    Filed: October 3, 1980
    Date of Patent: May 3, 1983
    Assignee: Reed Rock Bit Company
    Inventor: Paul E. Pastusek
  • Patent number: 4183416
    Abstract: Lubricant is circulated from a lubricant reservoir to the bearings of a rotary rock bit and back to the lubricant reservoir by a lubricant circulation system that is operated by rotation of the cone cutter upon the bearing pin of the bit. A seal is positioned between the rolling cone cutter and the arm of the bit to maintain lubricant in the bearing area and to prevent fluid and materials in the borehole from entering the bearing area. A lubricant reservoir is located in the bit body. A first passage connects the lubricant reservoir with the bearing area to channel lubricant from the lubricant reservoir to the bearing area. A second passage extends from the bearing area to the lubricant reservoir to allow lubricant to be channeled back to the lubricant reservoir.
    Type: Grant
    Filed: August 18, 1978
    Date of Patent: January 15, 1980
    Assignee: Dresser Industries, Inc.
    Inventor: D. F. Walters
  • Patent number: 4181185
    Abstract: Lubricant is circulated from a lubricant reservoir to the bearings of a rotary rock bit and back to the lubricant reservoir by a lubricant circulation system that is operated by rotation of the cone cutter upon the bearing pin of the bit. A seal is positioned between the rolling cone cutter and the arm of the bit to maintain lubricant in the bearing area and to prevent fluid in the borehole from entering the bearing area. A lubricant reservoir is located in the bit body. A first passage connects the lubricant reservoir with the bearing area to channel lubricant from the lubricant reservoir to the bearing area. A second passage extends from the bearing area to the lubricant reservoir to allow lubricant to be channeled back to the lubricant reservoir.
    Type: Grant
    Filed: September 5, 1978
    Date of Patent: January 1, 1980
    Assignee: Dresser Industries, Inc.
    Inventors: Wilbur S. Keller, William D. Vanderford
  • Patent number: 4167220
    Abstract: A system for continuous lubrication of bearings in a drilling apparatus including a roller bit having at least one pivot and a cutting roller rotatably supported on the pivot by bearings. The system comprises pumping means in the form of spiral or oblique grooves on one of the spaced confronting faces of the roller bit and cutting roller and a flow opening or port arranged to effect flow of a flushing liquid through the bearing upon rotations of the cutting roller. The grooves may be selectively oriented to pump flushing liquid through the annular gap between the roller bit and cutting roller faces radially inwardly or radially outwardly for a given direction of rotation of the cutting roller.
    Type: Grant
    Filed: January 27, 1978
    Date of Patent: September 11, 1979
    Assignee: SKF Kugellagerfabriken GmbH
    Inventors: Horst M. Ernst, Armin Olschewski, Lothar Walter, Manfred Brandenstein
  • Patent number: 4167219
    Abstract: Lubricant is circulated from a lubricant reservoir to the bearings of a rotary rock bit and back to the lubricant reservoir by a lubricant circulation system that is operated by rotation of the cone cutter upon the bearing pin of the bit. A spiral groove system in the inner surface of the cone cutter operates as a viscous or ram pump when the cone cutter is rotating against the corresponding bearing surface of the bearing pin and provides the pumping action for circulating the lubricant. A seal is positioned between the rolling cone cutter and the arm of the bit to maintain lubricant in the bearing area and to prevent fluid in the borehole from entering the bearing area. A lubricant reservoir is located in the bit body. A first passage connects the lubricant reservoir with the bearing area to channel lubricant from the lubricant reservoir to the bearing area. A second passage extends from the bearing area to the lubricant reservoir to allow lubricant to be channeled back to the lubricant reservoir.
    Type: Grant
    Filed: August 24, 1978
    Date of Patent: September 11, 1979
    Assignee: Dresser Industries, Inc.
    Inventor: Robert W. McQueen