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| Number | Title | Issue Date |
| 6562086 | Fatty acid amide lubricity aids and related methods for improvement of lubricity of fuels A fuel composition of improved lubricity comprises a lubricity-increasing amount of a lubricity aid dissolved in low sulfur diesel fuel and spark ignition fuels. The lubricity aid is an alkanolamide of a fatty acid, an alkanolamide of a modified fatty aci... | 05/13/2003 |
| 6187469 | High temperature solid state hollow cylindrical battery including a plurality of solid polymer electrolyte cell There is disclosed a battery system to be used in downhole application. The battery system provides energy to operate the measurement devices associated with drilling. The system includes a plurality of cells, each comprising an electrically insulating ma... | 02/13/2001 |
| 6167915 | Well pump electrical cable with internal bristle support An electrical cable has helically attached bristles for supporting the electrical cable when pulled through a string of coiled tubing to connect to an electrical submersible pump. The electrical cable and helically attached bristles have a circumscribed d... | 01/02/2001 |
| 6116359 | Tri-cone kerf gage An earth-boring bit has a bit body with at least one bearing shaft depending inwardly and downwardly therefrom. A cutter is mounted for rotation on each bearing shaft and has a cutter shell surface and a plurality of cutting elements arranged on the shell... | 09/12/2000 |
| 6079507 | Drill bits with enhanced hydraulic flow characteristics This invention discloses a drilling structure having a body defining at least one primary channel and at least one secondary channel therein to initiate and maintain recirculation of an amount of drilling fluid back through the secondary channel to mainta... | 06/27/2000 |
| 6056072 | Lubricating grease A heavy-duty lubricating grease is shown which includes a synthetic fluid base and a thickener system. The heavy-duty grease can be used in both rolling element and journal type rock bit bearings to drill in heavy-duty, high temperature applications, such... | 05/02/2000 |
| 6021095 | Method and apparatus for remote control of wellbore end devices A wellbore remote control system is disclosed which includes (1) a transmission apparatus for generating at least one acoustic transmission having a particular transmission frequency, (2) a reception apparatus which includes an electronic circuit (prefera... | 02/01/2000 |
| 5995449 | Method and apparatus for improved communication in a wellbore utilizing acoustic signals A method and apparatus is provided for communicating a control signal in a wellbore between a transmission node and a reception node through an acoustic transmission pathway which extends between the transmission node and the reception node. A transmissio... | 11/30/1999 |
| 5697462 | Earth-boring bit having improved cutting structure A bit body has at least one cantilevered bearing shaft depending inwardly and downwardly from the bit body. A cutter is mounted for rotation on the bearing shaft and includes a plurality of cutting elements arranged in generally circumferential rows on th... | 12/16/1997 |
| 5683343 | Feed accelerator system including feed slurry accelerating nozzle apparatus A feed accelerator system for use in a centrifuge, the system comprising a conveyor hub rotatably mounted substantially concentrically within a rotating bowl, the conveyor hub including at least one passageway connecting an inside surface of the conveyor ... | 11/04/1997 |
| 5663512 | Hardfacing composition for earth-boring bits A hardfacing composition comprises at least 60% by weight of hard metal granules including a quantity of sintered carbide pellets and a quantity of cast carbide pellets. The cast and sintered carbides are selected from the group of carbides consisting of ... | 09/02/1997 |
| 5658232 | Feed accelerator system including feed slurry accelerating nozzle apparatus A feed accelerator system for use in a centrifuge, the system comprising a conveyor hub rotatably mounted substantially concentrically within a rotating bowl, the conveyor hub including at least one passageway connecting an inside surface of the conveyor ... | 08/19/1997 |
| 5655611 | Earth-boring bit with improved bearing seal An earth-boring bit has a bit body and at least one bearing shaft depending inwardly and downwardly from the bit body. The bearing shaft has a base and a generally cylindrical bearing surface and at least one cutter is mounted for rotation on the bearing ... | 08/12/1997 |
| 5655612 | Earth-boring bit with shear cutting gage An earth-boring bit is provided with hard gage inserts that protrude from the gage surface of the cutter to engage the side of the borehole for holding gage. The cutting end of the gage insert has a cutting end defining at least one sharp cutting edge and... | 08/12/1997 |
| 5651756 | Feed accelerator system including feed slurry accelerating nozzle apparatus A feed accelerator system for use in a centrifuge, the system comprising a conveyor hub rotatably mounted substantially concentrically within a rotating bowl, the conveyor hub including at least one passageway connecting an inside surface of the conveyor ... | 07/29/1997 |
| 5632714 | Feed accelerator system including accelerating vane apparatus A feed accelerator system for use in a centrifuge, the system comprising a conveyor hub rotatably mounted within a rotating bowl, the hub including an inside surface and an outside surface. At least one feed slurry passageway is disposed between the insid... | 05/27/1997 |
| 5602083 | Use of sized salts as bridging agent for oil based fluids An oil-based fluid system has been discovered using a distribution of salt particle sizes, an oil or water/oil emulsion, a suspending agent for suspending the salt particles in the oil and a filtration control agent. It is important that the salt particle... | 02/11/1997 |
| 5598890 | Completion assembly The invention involves an assembly, specifically beneficial in deviated well-bores, which allows running into the wellbore with the complete completion assembly. The completion assembly includes one or more screens which may be pre-packed. Initially, a ma... | 02/04/1997 |
| 5592991 | Method and apparatus of installing a whipstock A one-trip system for milling a window using a whipstock is disclosed. The whipstock can be set on a packer or anchor which can be an electric line-type packer which, without modifications, can be set with the hydraulic mechanism disclosed so as to avoid ... | 01/14/1997 |
| 5582258 | Earth boring drill bit with chip breaker A drill bit for boring an earth formation is designed for rotation in a given direction. The bit body includes an operating face with at least one cutting element formed thereon. A cutting surface formed on the cutting element faces in a forward direction... | 12/10/1996 |
| 5579842 | Bottomhole data acquisition system for fracture/packing mechanisms A method and apparatus for acquisition of downhole well data such as bottomhole pressure, bottomhole temperature, etc. which is utilized in conjunction with other well equipment such as gravel packer tools especially for data acquisition at well depths th... | 12/03/1996 |
| 5431759 | Cable jacketing method An electrical cable and a method for manufacturing the electrical cable are provided in which a plurality of insulated conductors have a protective jacket extruded thereabout, the protective jacket having an exterior ribbed surface which includes a plural... | 07/11/1995 |
| 5262130 | Fixed bed chemical reactor A catalyst support for use in promoting oxidation reactions composed of metal particles is described. The metal particles are selected from the group of aluminum, tantalum, titanium, tungsten, niobium and mixtures thereof, where aluminum is preferred. The... | 11/16/1993 |
| 5115218 | Microwave process seal and method A microwave process seal and method is provided for use, for example, in the detection of ullage level and flow in a vessel or conduit by detecting the presence of a solid or liquid material in proximity to a microwave detector. Particularly, a horn desig... | 05/19/1992 |
| 4995058 | Wireline transmission method and apparatus In a wireline data transmission system for passing data between downhole and surface locations in a wellbore, a system for transmitting data at a frequency above the relatively low roll of frequency of a wireline permits higher data rates to be transmitte... | 02/19/1991 |
| 4961862 | Amendment addition system and method for twin belt press filter A twin belt filter press system has an amendment such as sawdust, fed to a sludge or slurry being dewatered after the sludge/slurry has been initially dewatered in a gravity drain section to form a cake on a first porous belt. The amendment cascades into ... | 10/09/1990 |
| 4840283 | Double shell thickener A double-walled thickener tank has an outer shell bottom and an inner shell bottom spaced by spaced bars with interconnected or discrete void spaces between the bars. An incompressible load-carrying permeable material such as oil-impregnated sand is compa... | 06/20/1989 |
