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| Number | Title | Issue Date |
| 7322410 | Controllable production well packer An apparatus and method for operating an electrically powered device in a packer using the piping structure of the well as an electrical conductor for providing power and/or communications. The electrically powered device may comprise an electrically controllable va... | 01/29/2008 |
| 7259688 | Wireless reservoir production control A reservoir production control system includes a plurality of wells for producing a reservoir linked to a central computer over a downhole communication network and a surface communication network. Both the downhole and the surface communication networks are wireles... | 08/21/2007 |
| 7249546 | Die-shaping apparatus and process and product formed thereby A progressive die for shaping a consecutive series of discs from a strip of relatively stiff material, comprising a series of adjacent die stations including a slot cutting station, a plurality of intermediate stations, and a cut off station, the slot cutting statio... | 07/31/2007 |
| 7163065 | Combined telemetry system and method Telemetry systems and methods are disclosed for real time communication of information between multiple positions in a wellbore. ... | 01/16/2007 |
| 5996713 | Rolling cutter bit with improved rotational stabilization A rock bit has a body and three cutters that include generally conical surfaces, at least one of which contains an outermost, circumferential row of heel teeth that dislodge cuttings from the borehole wall and bottom. The heel teeth form a corner with the... | 12/07/1999 |
| 5641029 | Rotary cone drill bit modular arm A drill bit (20) for a modular arm (70) is provided. The modular arm (70) includes an inside surface (76) having first (144) and second (146) angled surfaces whose lower portions form an inwardly projecting wedge (125). A curved throat relief area (87) co... | 06/24/1997 |
| 5624002 | Rotary drill bit A rotary cone drill bit having a one-piece bit body with a lower portion having a convex exterior surface and an upper portion adapted for connection to a drill string. The drill bit will generally rotate around a central axis of the bit body to form a bo... | 04/29/1997 |
| 5586612 | Roller cone bit with positive and negative offset and smooth running configuration An earth-boring bit has a bit body and at least a pair of cantilevered bearing shafts depending downwardly and inwardly therefrom. A first cutter is mounted for rotation on one of the bearing shafts and has a region of contact with the sidewall of the bor... | 12/24/1996 |
| 5439068 | Modular rotary drill bit A rotary cone drill bit for forming a borehole having a one-piece bit body with a lower portion having a convex exterior surface and an upper portion adapted for connection to a drill string. The drill bit will generally rotate around a central axis of th... | 08/08/1995 |
| 4984643 | Anti-balling earth boring bit A three cone earth boring bit having circumferential rows of earth disintegrating teeth of wear resistant inserts of selected projection from the cone surfaces, one cone having an inner row separated from a heel row by a narrow circumferential groove and ... | 01/15/1991 |
| 4727943 | Rotary drill bit 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;... | 03/01/1988 |
| 4623027 | Unsegmented rotary rock bit structure and hydraulic fitting An unsegmented structure for a rotary rock bit is disclosed comprising a one piece body of spring steel wherein individual journal members after being assembled with associated rotary rock cutters are interference fit to the free ends of downwardly direct... | 11/18/1986 |
| 4513829 | Chip relief for rock bits This invention relates to roller cone, air circulation type rock bits. Means are provided on the rock bit body as well as on the shirttail portion of each of the legs extending from the body to provide a relief to pass rock chips from the borehole bottom ... | 04/30/1985 |
| 4417629 | Drill bit and method of manufacture A method of making a rolling cutter drill bit involving the steps of forming a body member having an upper portion adapted to be threaded and passaging therein, forming at least one arcuate recess in the lower end of the body member, providing a lug assem... | 11/29/1983 |
| 4369849 | Large diameter oil well drilling bit The present invention discloses a large diameter oil well drilling bit which utilizes a unique cast body upon which are secured a plurality of cutting assemblies comprising a leg, a bearing journal and a rolling cutter mounted on the bearing journal.... | 01/25/1983 |
