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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7281593 | Method for the circulation of gas when drilling or working a well A method for the circulation of gas when drilling or working a well. The method includes the step of pressurizing at least two chambers of a multi-chambered accumulator with inert gas. The chambers of the multi-chambered accumulator are operatively connected to one ... | 10/16/2007 |
| 7275593 | Gripper assembly for downhole tools A gripper assembly for anchoring a tool within a downhole passage and for possibly assisting movement of the tool within the passage. The gripper assembly includes an elongated mandrel and flexible toes that can be radially displaced to grip onto the surface of the ... | 10/02/2007 |
| 7243741 | Separation of evolved gases from drilling fluids in a drilling operation A fluid handling system for drilling cuttings utilizes a constant and gravity managed liquid level between a substantially atmospheric separator and a shale shaker. Substantially all of the gas entrained in the cuttings is evolved and passed to a flare for preventin... | 07/17/2007 |
| 7195084 | Systems and methods for storing and handling drill cuttings Vessels for selectively holding drilling cuttings material and methods employing such vessels; the vessels, in at least certain aspects, having a body with a hollow container with an interior space for receiving drilling cuttings material and from which the material... | 03/27/2007 |
| 7013996 | Impact device An impact device for a rock drill. The rock drill includes a tool and a mechanism for delivering a stress pulse to the tool. That mechanism includes an impact element supported to a frame of the drill, and a mechanism for subjecting the impact element to stress and ... | 03/21/2006 |
| 6763901 | Air delivery system for a direct push drilling swivel A power swivel provides the rotational force to drill consolidated subsurface strata while an unrestricted airflow through the swivel and down a drill string remove cuttings from the borehole. The power swivel is configured to mount on direct push equipment, such as... | 07/20/2004 |
| 6668943 | Method and apparatus for controlling pressure and detecting well control problems during drilling of an offshore well using a gas-lifted riser A method and apparatus for controlling the riser base pressure and detecting well control problems, such as kicks or lost circulation, during drilling of an offshore well using a gas-lifted riser. The pressure control apparatus preferably includes two sep... | 12/30/2003 |
| 6637522 | Enhanced computer control of in-situ drilling system An apparatus and method is provided for substantially continuously drilling and disposing of drill cuttings and dust to minimize airborne contamination while providing protection against overload using enhanced computer control. A drill stem with a bit is... | 10/28/2003 |
| 6618966 | Fluid lance apparatus The present invention is a lance for removing dirt or other substances from an underground hole, by the use of air and water under high pressure. The water is used as an abrading material or lance to loosen dirt in a hole or to pick or chip off substances... | 09/16/2003 |
| 5944122 | Methods and apparatus for controlling an air compressor in a drill string flushing system A flushing system for supplying compressed flushing air to a drill string for flushing cuttings during a drilling operation includes an air compressor having an inlet valve at the compressor inlet, and a turnvalve at the compressor outlet. Those valves ar... | 08/31/1999 |
| 5775442 | Recovery of gas from drilling fluid returns in underbalanced drilling The drilling fluid returns from underbalanced drilling are introduced into a separator and a separate gas stream is recovered. The gas stream is cleaned at the well site to remove entrained liquid and particulate solids, to produce gas suitable to be fed ... | 07/07/1998 |
| 5435628 | Underground hydraulic mining method and apparatus An underground method and apparatus for recovery of mineral deposits from sloping seams including high pressure water jet mineral dislodgement from underground deposits and water borne transport of dislodged mineral to an underground recovery site, and co... | 07/25/1995 |
| 5409072 | Method and an arrangement for controlling the supply of air into a rock drilling machine A method and an arrangement for controlling the supply of air into a rock drilling machine. In the method, the air supply of an air compressor in a power unit operated by a diesel engine is adjusted so that when the percussion pressure of the percussion d... | 04/25/1995 |
| 5330017 | Method of processing drilling mud in earth-boring operations A method and associated apparatus are provided for processing the drilling mud used to flush cuttings from the bore hole while maintaining control of bore hole pressure. Air is injected into the lower regions of drilling mud in the working pits to agitate... | 07/19/1994 |
| 4867256 | Injection of polymer chemicals into drilling mud The mud of a drilling well is treated by injecting a liquid polymer chemical into the suction of a main circulating mud pump rather than by pouring the liquid chemical into the open collar of a drill pipe joint while making a connection. This causes the m... | 09/19/1989 |
| 4577700 | Method and system for displacing drilling fluid from a drill string in a well drilling system A rotary well drilling system employs a drill string with a drill bit affixed at its lower end for the drilling of a borehole. Drilling fluid is circulated through the drill string to remove drill cuttings. To break out a section of drill pipe from the dr... | 03/25/1986 |
| 4315553 | Continuous circulation apparatus for air drilling well bore operations An apparatus for maintaining a continuous supply of air pressure downhole during a well bore drilling operation, even during the addition of a pipe section to the drill string, and comprising a housing installed at the surface of the well at the position ... | 02/16/1982 |
| 4029160 | Drilling machine A drilling machine for drilling floors or walls having a frame in which a drilling rod is displaced by a screw member. A container on the frame is placed around the drilling rod to fasten the frame to the floor or wall, to cool the drill, and to collect t... | 06/14/1977 |
| 3968845 | Apparatus and method for geological drilling and coring Apparatus and method for complete reverse air vacuum drilling by entrainment of chips and dust in a high velocity air stream created by applying a vacuum to the drill stem or the annulus of a drilled hole, removing the drilled particles by entrainment in ... | 07/13/1976 |
| 3958650 | Drilling system using weight of mud A drill system for drilling very large holes in the earth, of diameters up to from 10 to 20 feet, by means of a rotary bit carrying a plurality of cutters, wherein the bit assembly is pressed against the bottom of the hole, so that the unit pressure again... | 05/25/1976 |
