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| Number | Title | Issue Date |
| 7086484 | Determination of thermal properties of a formation The present invention relates to methods and apparatus for making in situ thermal property determinations utilizing a heat source employed in wellbore stabilization procedures, well drilling, or well perforating, for example. In particular, using a heat source, such... | 08/08/2006 |
| 6920945 | Method and system for facilitating horizontal drilling A method for facilitating horizontal drilling by positioning in a well casing a shoe defining a passageway extending from an upper opening in the shoe through the shoe to a side opening in the shoe. A rod is connected, through at least one block and pin assembly ope... | 07/26/2005 |
| 6880646 | Laser wellbore completion apparatus and method A method and apparatus for providing fluid flow into a wellbore in which an apparatus having at least one laser energy output is lowered into the wellbore and the at least one laser energy output is directed at a wall of the wellbore. At least a portion of the wall ... | 04/19/2005 |
| 4491367 | Method for subterranean generation of heat as a source of energy Subterranean generation of heat as a source of energy optionally accompanied by the production of minerals. In subterranean formations of minerals that are capable of undergoing an enthalpic degradation, such degradation is artificially accelerated by sev... | 01/01/1985 |
| 4304308 | Burner apparatus for making holes in coal seams A method and apparatus for making holes in coal seams in a coal mining system in which hot working gas is employed to impinge on the coal under high pressure and speed in order to disintegrate it and particularly for making inclined or horizontal holes wh... | 12/08/1981 |
| 4301875 | Method for making holes and producing gas in coal seams A method and apparatus for making holes in coal seams in a coal mining system in which hot working gas is employed to impinge on the coal under high pressure and speed in order to disintegrate it and particularly for making inclined or horizontal holes wh... | 11/24/1981 |
| 4227582 | Well perforating apparatus and method A method and apparatus for perforating a well casing and surrounding formation are disclosed. The perforating apparatus includes a laser source for projecting a high intensity laser beam transversely through the well bore and surrounding formation and a n... | 10/14/1980 |
| 4168752 | Flexible conduit for effecting lateral channelling in coal or oil shale beds There is provided in accordance with the invention apparatus and a method for boring holes through carbonaceous deposits. The method involves the step of introducing combustion-supporting gases such as air under pressure through the apparatus installed in a we... | 09/25/1979 |
| 3990835 | Burner for igniting oil shale retort A technique is described for igniting the oil shale rubble pile in an in situ oil shale retort. A gas-air burner is lowered through a hole to a plenum over the oil shale to be ignited. An excess of air is passed through the hole and around the burner so t... | 11/09/1976 |
