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Class Information
Number: 102/312
Name: Ammunition and explosives > Blasting > Patterned blasting > Borehole arrangement
Description: Subject matter wherein a blasting charge is in each of several boreholes.










Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
4966077 Loading of boreholes with explosive Oct. 30, 1990
4953464 Multi-directional signal transmission in a blast initiation system Sep. 4, 1990
4951744 Angularly shaped unitary structured base strip comprised of a specific material adapted for phasing charges in a perforating gun Aug. 28, 1990
4915029 Shaped charge carrier assembly method Apr. 10, 1990
4901802 Method and apparatus for perforating formations in response to tubing pressure Feb. 20, 1990
4885993 Shaped charge with bifurcated projection for detonating cord Dec. 12, 1989
4875413 Apparatus for perforating wells Oct. 24, 1989
4869173 Blasting plug with plate members and plastic resin Sep. 26, 1989
4864933 Method of rock breakage by blasting Sep. 12, 1989
4860656 Joining metal tubes in a liquid environment Aug. 29, 1989
4852495 Shaped charge detonating cord retainer arrangement Aug. 1, 1989
4836109 Control line differential firing head Jun. 6, 1989
4829902 Method for charging flowable explosives into upwardly extending boreholes May. 16, 1989
4815385 Blast focusing method and apparatus Mar. 28, 1989
4807530 Expansive demolition agent Feb. 28, 1989
4800815 Shaped charge carrier Jan. 31, 1989
4787315 Apparatus for severing tubular members Nov. 29, 1988
4777880 Blasting method with above and below surface delays Oct. 18, 1988
4770097 Mining method with no delay between shot initiator and firing Sep. 13, 1988
4762067 Downhole perforating method and apparatus using secondary explosive detonators Aug. 9, 1988
4757764 Nonelectric blasting initiation signal control system, method and transmission device therefor Jul. 19, 1988
4754705 Mechanical stemming construction for blast holes and method of use Jul. 5, 1988
4739707 Shaped charge carrier assembly Apr. 26, 1988
4716833 Method of assembling a tanged charge holder Jan. 5, 1988
4702168 Sidewall core gun Oct. 27, 1987
4699066 Linear explosive separation system Oct. 13, 1987
4699060 Detonation arrestor device for bulk explosive materials transfer Oct. 13, 1987
4690058 Smooth wall blasting in rock Sep. 1, 1987
4681037 Tanged charge holder Jul. 21, 1987
4656944 Select fire well perforator system and method of operation Apr. 14, 1987
4635734 Boosterless perforating gun and method of assembly Jan. 13, 1987
4632034 Redundant detonation initiators for use in wells and method of use Dec. 30, 1986
4614156 Pressure responsive explosion initiator with time delay and method of use Sep. 30, 1986
4586438 Borehole stemming with a column of liquefiable and/or vaporizable chunks of solid material May. 6, 1986
4572075 Methods and apparatus for loading a borehole with explosives Feb. 25, 1986
4550786 Method of driving steel profiles into a rock substratum Nov. 5, 1985
4545622 Method of rubblization for in-situ oil shale processing Oct. 8, 1985
4528910 Apparatus for cutting a submerged tube by means of a pyrotechnic charge Jul. 16, 1985
4522129 Device for charging drillholes Jun. 11, 1985
4522448 Method and apparatus for reclamation by reducing highwalls to gradable rubble at augered or longwalled mining sites Jun. 11, 1985
4522125 Charging large diameter vertical boreholes Jun. 11, 1985
4519314 Borehole charging method including toroidal transformer cores May. 28, 1985
4513665 Method for loading explosive charges into blastholes formed in a subterranean formation Apr. 30, 1985
4508035 Explosive charging apparatus for rock drilling Apr. 2, 1985
4501199 Automatically controlled rock drilling apparatus Feb. 26, 1985
4498391 Explosive mine breaking apparatus with arc-suppressing heat-dissipating fluid around the charge bodies Feb. 12, 1985
4481884 Field-connected explosive booster for initiating low-energy explosive connecting cords Nov. 13, 1984
4464994 Apparatus for plugging a blast hole in an in situ oil shale retort or the like Aug. 14, 1984
4464993 Process for use in blasting in situ retorts and the like Aug. 14, 1984
4447090 Process for forming an in situ oil shale retort May. 8, 1984

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