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| Number | Title | Issue Date |
| 7950328 | Blast hole liner A borehole liner comprising a continuous length of polymer tubing of alternating diameters forming undulations sized for creating undulations in the liner to optimize the annular air gap alternating with full bore hole diameter loads of explosive to effectively redu... | 05/31/2011 |
| 7284601 | Casing conveyed well perforating apparatus and method Disclosed is a device and method for externally perforating a well-bore casing. The perforating apparatus is attached to the outside of the casing itself and is conveyed along with the casing when it is inserted into the well bore. The perforation is accomplished us... | 10/23/2007 |
| 7284489 | Casing conveyed well perforating apparatus and method Disclosed is a device and method for externally perforating a well-bore casing. The perforating apparatus is attached to the outside of the casing itself and is conveyed along with the casing when it is inserted into the well bore. The perforation is accomplished us... | 10/23/2007 |
| 7258054 | Continuous explosive charge assembly for use in an elongated cavity A method and apparatus for placement of continuous pre-split, gel explosive in an elongated borehole or cavity. An anchor is attached to one end of a selected length of continuous gel explosive. A suitable anchor is a flexible, plastic “pilgrim's hat” with a hol... | 08/21/2007 |
| 7240618 | Explosive device with accelerated bioremediation capacity Technology for in situ remediation of undetonated explosive material. An explosive apparatus contains an explosive material in close proximity with a carrier containing microorganisms and with nutrient for the microorganisms. An explosive mixture capable of self rem... | 07/10/2007 |
| 7210409 | Modular explosives cartridge and novel spider construction A modular explosives cartridge comprises a tubular body having lockable coupling members secured on opposite ends thereof to form a bayonet coupling between opposite ends of respective cartridges to form an elongate tubular explosives cartridge. The lockable couplin... | 05/01/2007 |
| 7077044 | Method for bioremediating undetonated explosive device Technology for in situ remediation of undetonated explosive device. An explosive device contains an explosive material in close proximity with microorganisms capable of metabolizing the explosive material that are either mobile or temporarily deactivated by freeze d... | 07/18/2006 |
| 7073448 | Shaped charge tubing cutter A shaped charge tubing cutter includes a minimal contact suspension to isolate the cutter explosive from the housing and sub structure. A charge detonation booster main-cavity is located on the juncture of the charge truncation planes. Explosive in the booster main-... | 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 |
| 6901865 | Primer casing and method of charging a blasthole Primer casing (1) comprising sleeve portion (5) and leading portion (5a), wherein sleeve portion (5) includes tabs (6) to retain primer (11) and blasthole engagement means (2), and wherein leading portion (5... | 06/07/2005 |
| 6886466 | Method and apparatus for sleeving a borehole A novel method and device for sealing a borehole that is filled either partially or completely with water. A water-permeable sleeve is capable of expanding to the diameter of the borehole, and is constructed of a material that will allow the passage of water in and ... | 05/03/2005 |
| 6722251 | Method for loading a continuous explosive charge assembly in an elongated cavity A method and apparatus for placement of continuous pre-split, gel explosive in an elongated borehole or cavity. An anchor is attached to one end of a selected length of continuous gel explosive. A suitable anchor is a flexible, plastic “pilgrim's hat” with a hol... | 04/20/2004 |
| 6564686 | Continuous explosive charge assembly and method for loading same in an elongated cavity A method and apparatus for placement of continuous pre-split, gel explosive in an elongated borehole or cavity. An anchor is attached to one end of a selected length of continuous gel explosive. A suitable anchor is a flexible, plastic "pilgrim's hat" wit... | 05/20/2003 |
| 6435096 | Method and apparatus for controlled small-charge blasting by decoupled explosive A cartridge containing an explosive charge is inserted at the bottom of a short hole drilled in the rock. The cartridge is held in place or stemmed by a massive stemming bar of high-strength material such as steel. The cartridge incorporates additional in... | 08/20/2002 |
| 6009811 | Charge assembly for a pipe-coupling cutting device A charge assembly for use in a cutter for splitting couplings used in joining together lengths of buried pipe is provided that allows several explosive charge segments to be used instead of a single explosive charge. The smaller explosive charge segments ... | 01/04/2000 |
| 5798477 | Explosive cartridge assembly for presplitting rock The present invention includes a small diameter explosive cartridge and a two-stage large diameter explosive cartridge apparatus for presplitting rock can be axially detonated by detonating cord through a central detonation passageway in the explosive car... | 08/25/1998 |
| 5474364 | Shotgun cartridge rock breaker A rock breaker uses shotgun cartridges or other firearm ammunition as the explosive charge at the bottom of a drilled borehole. The breaker includes a heavy steel rod or bar, a gun with a firing chamber for the ammunition which screws onto the rod, a long... | 12/12/1995 |
| 5343002 | Disposable point with explosive charge for seismic exploration A disposable point detachably mounted on the lower end of a vertically movable hole forming elongated member with the point having an explosive charge mounted therein in order for the disposable point and explosive charge to remain in the bottom of a hole... | 08/30/1994 |
| 5259316 | Method and apparatus for wet/dry, small bore hole explosive device A wet/dry explosive assembly for use with small diameter bore holes is disclosed. The device utilizes a small diameter watertight inner containment vessel to house a predetermined amount of blasting agent, such as ammonium nitrate with fuel oil (AN/FO). A... | 11/09/1993 |
| 5192819 | Bulk explosive charger There is disclosed, according to the present invention, an apparatus and method for loading explosives exhibiting little water resistance into water filled blast holes without contamination of the explosives by water. A pressure charger vessel, capable of... | 03/09/1993 |
| 5131465 | Perforating apparatus for circulating cement In accordance with an illustrative embodiment of the present invention, a perforating gun apparatus for forming holes in a well casing through which cement can be circulated includes a mandrel, four arm-mounted, shaped charge carriers on the body, and bow... | 07/21/1992 |
| 4969525 | Firing head for a perforating gun assembly A hydraulically actuated firing head for a tubing conveyed well perforating system includes an actuating piston responsive to a differential between tubing pressure and a sealed low pressure zone contained within the firing head. The actuating piston rele... | 11/13/1990 |
| 4961381 | Primer centering device for large diameter blastholes An improved method for reducing misfires in large diameter unlined blastholes by fitting on the primer used in the blasthole a centering device comprised of a semi-conducting plastic material.... | 10/09/1990 |
| 4706567 | Explosive charges The disclosure relates to a method for producing charges for explosive jointing of large-diameter pipes such as pipelines. According to the invention, such charges are formed in that a strip-shaped flat explosive is wound and joined together to form a cir... | 11/17/1987 |
| 4528910 | Apparatus for cutting a submerged tube by means of a pyrotechnic charge Apparatus for the pyrotechnic cutting of a submerged tube. The apparatus, which is introduced into the tube, comprises in a conventional manner a chassis on which is mounted a support for a pyrotechnic charge, a shield in the upper part of the chassis and a ... | 07/16/1985 |
| 4499828 | Barrier breaching device A barrier breaching device that is designed primarily for opening holes in interior walls of buildings uses detonating fuse for explosive force. The fuse acts as the ribs or spokes of an umbrella-like device that may be opened up to form a cone. The cone ... | 02/19/1985 |
| 4464994 | Apparatus for plugging a blast hole in an in situ oil shale retort or the like A plugging apparatus is provided to reliably plug a bottomless blast hole in underground oil shale retorts and oil and gas wells. The plugging apparatus has a special electrically powered sequencer which automatically lowers and releases a bag of cementat... | 08/14/1984 |
| 4464993 | Process for use in blasting in situ retorts and the like An improved process is provided for blasting in situ oil shale retorts, and oil and gas wells. In the process, a specially formed concrete plug is installed at a desired depth in a bottomless blast hole and an explosive charge is placed upon the plug and ... | 08/14/1984 |
| 4399829 | Tapping apparatus and method A tapping apparatus and method for making connections to pipelines and vessels while they are in service and contain fluid under pressure. The tapping apparatus and method includes an explosively driven punch that is operated to penetrate the pipeline. A ... | 08/23/1983 |
| 4371044 | Simultaneous multigun high density multiphase perforating unit A perforating unit for high density, multiphase well perforating operations having a plurality of elongate cylindrical perforating gun barrels whose firing axes are at predetermined angles one relative to the other. A multiport top sub secures the upper e... | 02/01/1983 |
| 4278025 | Seismic explosive charge loader and anchor An improved seismic explosive charge loader and anchor for loading and anchoring explosives in cylindrical containers in bore holes is disclosed, which includes a snap in spring band shaped anchor which effectively anchors the loader in the well bore agai... | 07/14/1981 |
| 4122899 | Well perforator with anchor and method A cased borehole has a tubing string run downhole thereof. A packer affixed to the tubing is set with the tubing string terminating in proximity of a hydrocarbon producing formation to be completed. A wireline operated perforating gun is suspended from a ... | 10/31/1978 |
| 3939771 | Seismic explosive charge loader and anchor A seismic explosive charge loader and anchor is disclosed for loading and anchoring explosives in conventional containers, such as cylindrical packages and cans provided with projecting circumferential rims. The loader includes a first tubular member havi... | 02/24/1976 |
