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| Number | Title | Issue Date |
| 7942481 | Rock drill and method of breaking rock A method of breaking rock which includes the steps of drilling a hole in the rock using a drill rod; leaving the drill rod in the hole; using water flow to direct a propellant charge into the hole through a passage in the drill rod; and at a leading end of the drill... | 05/17/2011 |
| 7406918 | Method of blasting A method of blasting in which rock pile profile associated with a blast field is controlled by precise control of the detonation delay times between and/or within individual blastholes in the blast field, in combination with the control of one or more other blast pa... | 08/05/2008 |
| 7387071 | Blasting method and blasting accessory A drill hole (350) extends into rock to be blasted. A blasting accessory (310) includes a container portion (312) for holding a predetermined volume of stemming material, and a spacer (330) for spacing the stemming material a predetermine... | 06/17/2008 |
| 7367631 | Method of and apparatus for breaking rock Apparatus for breaking rock includes a cartridge with a base and a wall which extends from the base, the base and the wall forming an enclosure, a propellant inside the enclosure and means for igniting the propellant, and wherein at least the wall is made from a mal... | 05/06/2008 |
| 7293615 | Earth boring system An earth boring apparatus for sinking shafts and removing shaft material from the shaft, the apparatus having at least two decks; hydraulic means for allowing movement of the decks relative to one another; releasable anchoring means associated with the decks for eng... | 11/13/2007 |
| 7264048 | Slot cavity A method for accessing a subterranean zone from the surface includes drilling a substantially vertical well bore from the surface to the subterranean zone and forming a slot cavity in the substantially vertical well bore proximate to the subterranean zone. The slot ... | 09/04/2007 |
| 7247222 | Electrochemical processing cell Embodiments of the invention may generally provide a small volume electrochemical plating cell. The plating cell generally includes a fluid basin configured to contain a plating solution therein, the fluid basin having a substantially horizontal weir. The cell furth... | 07/24/2007 |
| 7246659 | Damping fluid pressure waves in a subterranean well A system and method of damping fluid pressure waves in a subterranean well. In a described embodiment, pressure waves are damped by positioning a dampener in the well during a perforating operation. The dampener may attenuate the pressure waves by absorbing the pres... | 07/24/2007 |
| 7231989 | Drilling control arrangement A method and a control system for controlling rock drilling. A control unit of a rock drilling apparatus is provided with one or more control modes, each determining the drilling variables to be measured, their threshold values and the operating principles according... | 06/19/2007 |
| 7207390 | Method and system for lining multilateral wells In accordance with one embodiment of the present invention, a method for lining a lateral wellbore includes drilling a main wellbore extending from a surface to a subterranean zone, casing the main wellbore with a main casing having a plurality of lateral wellbore w... | 04/24/2007 |
| 7207395 | Method and system for testing a partially formed hydrocarbon well for evaluation and well planning refinement A method and system for testing a partially formed well includes forming a first well bore intersecting a subterranean formation. The first well bore includes a portion of a planned well having a first configuration. A production characteristic of the subterranean f... | 04/24/2007 |
| 7195085 | Drill bit An expandable drill bit comprises a body for mounting on a support string and two roller cutters mounted on the body. The cutters are movable between a smaller diameter first configuration and a larger diameter second configuration. In one embodiment the bit is adap... | 03/27/2007 |
| 7163063 | Method and system for extraction of resources from a subterranean well bore A method for stimulating production of resources from a coal seam includes forming a drainage well bore in the coal bed that has a first end coupled to a ground surface and a second end in the coal seam. The method further includes inserting a liner into the well bo... | 01/16/2007 |
| 7141256 | Packaging film having permeable patch covering an opening in the film and package made therefrom A package, which allows for butchering and packaging of fresh red meat at a centralized facility is provided which includes an impermeable tray supporting the product, a first film sealed to the tray for enclosing the product, a channel defined within the first film... | 11/28/2006 |
| 7100687 | Multi-purpose well bores and method for accessing a subterranean zone from the surface A well system includes at least two well bores extending from a surface to a subterranean zone. Each of the two well bores is used to form a well bore pattern for the subterranean zone that intersects the other well bore and transports fluid from the subterranean zo... | 09/05/2006 |
| 7073589 | System for fracturing wells using supplemental longer-burning propellants A system for fracturing wells uses a primary propellant charge to initially produce pressures within the well in excess of the maximum fracture extension pressure of the surrounding formation, but below that which would cause damage to the well. A supplemental prope... | 07/11/2006 |
| 7069862 | Handheld tool for breaking up rock A tool (12) has a body (14) with a barrel (18) having opposing threaded and fitted openings (30 and 28). An actuator pin tube (26), for slidably engaging an actuator pin (38) having a tip (40) opposing a retent... | 07/04/2006 |
| 7052092 | Drillhole blasting A blasting arrangement (10) includes drillholes (30) in a rock mass (20). Blind ends (32) are drilled to a desired level and, if necessary, are adjusted as shown at (62) to said level. Each hole (30) is plugged by means of a... | 05/30/2006 |
| 7051809 | Burn assisted fracturing of underground coal bed A method for fracturing subterranean coal formations by injecting air into the formation, igniting the coal, driving the fire away from the wellbore by injecting a cooling media into the burning formation adjacent the wellbore, and subsequently extinguishing the fir... | 05/30/2006 |
| 7047886 | Method and apparatus for removing obstructions in the mines The present invention is directed to a system for fragmenting rock obstacles and obstructions in mines. The system uses a projectile having a flat or concave nose and a detonating device that has a safety pin to prevent a striker from prematurely igniting the primer... | 05/23/2006 |
| 7036583 | In situ thermal processing of a hydrocarbon containing formation to increase a porosity of the formation A hydrocarbon containing formation may be treated using an in situ thermal process. A mixture of hydrocarbons, H2, and/or other formation fluids may be produced from the formation. Heat may be applied to the formation to raise a temperature of a portion o... | 05/02/2006 |
| 6964298 | Method and system for accessing subterranean deposits from the surface An improved method and system for accessing subterranean deposits from the surface substantially eliminates or reduces the disadvantages and problems associated with previous systems and methods. In particular, the present invention provides an articulated well with... | 11/15/2005 |
| 6942030 | Three-dimensional well system for accessing subterranean zones A method for accessing a plurality of subterranean zones from the surface includes forming an entry well from the surface and forming two or more exterior drainage wells from the entry well through the subterranean zones. The exterior drainage wells each extend outw... | 09/13/2005 |
| 6935702 | Crushing apparatus electrode and crushing apparatus An electrode for a crusher and a crusher capable of increasing energy utilized for crushing are obtained. The electrode 1 for a crusher comprises a central conductor (12, 17) extending along a central axis and having an outer peripheral surface, an ins... | 08/30/2005 |
| 6906535 | Method for characterizing water-in-oil emulsions using electrical wave forms A method is provided for characterizing emulsion stability to evaluate suitability of the emulsion for use as a drilling fluid in drilling subterranean boreholes. The method provides a supplement or alternative to the standard method of determining Electrical Stabil... | 06/14/2005 |
| 6672673 | Ore pass inspection system The present invention discloses an apparatus and method for imaging and clearing an ore pass hang-up. The apparatus includes: a platform that is movable along generally a longitudinal direction of an ore pass; a controllable propulsion unit capable of pro... | 01/06/2004 |
| 6672674 | Longwall mining with blasting The extraction machine for underground ore extraction operations, with extraction of the extraction product by blasting has an advancing support equipment (11) and a face conveyor (18) coupled to it as well as at least one boring device (26) for the produ... | 01/06/2004 |
| 6527345 | Method for excavating a tunnel rock face by drilling a pattern of lifter and line holes A method for excavating a tunnel rock face by drilling a pattern of lifter holes and line holes. The line holes ensure the grade or slope of the excavation meets specification while reducing the need for cleaning out the face. A longitudinal band of lifte... | 03/04/2003 |
| 6454359 | Method for blasting tunnels using an air bladder A tunnel blasting method is disclosed. The method including the step of drilling blast holes such as cut holes, cut spreader holes, floor holes and roof holes to predetermined depths and in a predetermined hole arrangement. The blast holes are loaded with... | 09/24/2002 |
| 6431075 | Center-cut method for tunnel excavation utilizing large unloaded blast holes and a circular pre-split Disclosed herein is a center-cut blasting method for tunnel excavation. The center-cut blasting method includes the step of drilling a single central center-cut hole at the center of a center-cut region, drilling a plurality of auxiliary center-cut holes ... | 08/13/2002 |
| 6347837 | Slide assembly having retractable gas-generator apparatus The present invention is directed to a boom supporting a slide assembly. The slide assembly includes a guide track, a drill, and a stemming member for use in small charge blasting. The drill is initially moved along the guide track to form the drill hole.... | 02/19/2002 |
| 6318272 | Breaking or blasting or splitting of rock A method of breaking rock (18), e.g. in underground mining, includes drilling a hole in the rock mass by means of a drilling machine (20) having an articulated boom (22) and a drilling tool (24) at the end of the boom (22). After drilling, the drilling to... | 11/20/2001 |
| 6213212 | Spherical stemming plug and method of use A method of stemming a borehole (6) includes the steps of placing a first layer (16) of stemming in the borehole, placing a spherical body (20) in the borehole on top of the layer (16), the body being relatively incompressible and a diameter slightly smal... | 04/10/2001 |
| 6148730 | Method and apparatus for controlled small-charge blasting by pressurization of the bottom of a drill hole Rock and other hard materials, such as concrete, are fragmented by a controlled small-charge blasting process. A cartridge containing an explosive charge is inserted at the bottom of a hole drilled in the rock. The explosive charge is configured to provid... | 11/21/2000 |
| 6145933 | Method for removing hard rock and concrete by the combination use of impact hammers and small charge blasting The present invention is directed to a method for breaking rock and other hard materials using small-charged blasting techniques followed by a mechanical impact breaker. In small-charge blasting techniques, a gas is released into the bottom of a sealed ho... | 11/14/2000 |
| 6070511 | Apparatus and process for loading emulsion explosives An apparatus and process for the production of any emulsion explosives composition and loading it into a blast hole (7) which utilize a loading conduit (4) having a shear inducing means (5) and a liquid lubrication source (b) adapted to provide a layer of... | 06/06/2000 |
| 6035784 | Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole Rock and other hard materials, such as concrete, are fragmented by a controlled small-charge blasting process. A cartridge containing an explosive charge is inserted at the bottom of a hole drilled in the rock. The explosive charge is configured to provid... | 03/14/2000 |
| 5996709 | Projectile assisted drill for seismic operations A portable system for drilling geophysical shot holes in mixed geologic conditions. The system includes a drill for creating a shot hole in unconsolidated soil and for maintaining gauge in mixed geologic conditions. An explosive projectile for contacting ... | 12/07/1999 |
| 5957540 | Blasting positioning device A device for unblocking mine raises which has multiple flexible arms attached to a top hollow tube which carries the explosive material. Flexible extension poles are attached to a top hollow tube section and hollow tube sections. The flexible arms allow f... | 09/28/1999 |
| 5907119 | Method of preventing afterblast sulfide dust explosions The invention comprises a method of preventing afterblast sulfide dust explosions in blasting operations involving sulfide-containing ores, which method comprises (a) loading a borehole that has been drilled into a sulfide-containing ore body with an emul... | 05/25/1999 |
