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| Number | Title | Issue Date |
| 4329925 | Fracturing apparatus An improvement in an apparatus for fracturing subterranean formation by explosive fracture wherein opposed end charges are detonated to enhance the explosive capability of a central charge, the improvement comprising intermediate driver charges intermedia... | 05/18/1982 |
| 4326462 | Shaped charge retention and barrier clip A shaped charge retention and barrier clip according to the invention includes a barrier ring means for preventing damage to the interior of a perforating gun, and retention means for securing the barrier ring means and the shaped charge to a carrier stri... | 04/27/1982 |
| 4319526 | Explosive safe-arming system for perforating guns An explosive safe-arming system for use in a perforating gun for oil and gas well wireline operation is disclosed, wherein a donor detonating explosive is used which includes two encased elements. The first element is fixedly secured within the perforatin... | 03/16/1982 |
| 4312273 | Shaped charge mounting system A mounting system for shaped charge explosive perforation of an oil well casing (24) includes an elongated support panel (28) having spaced apertures (44, 46) receiving cylindrical-conical shaped charges (26) retained by spring wire clips (30). The shaped... | 01/26/1982 |
| 4292895 | Explosive safe-arming apparatus for perforating guns An explosive safe-arming apparatus for use with a perforating gun which includes a fixed barrier disposed between a detonator explosive and a booster explosive, and a movable barrier disposed between laterally facing portions of the detonator and booster ... | 10/06/1981 |
| 4290486 | Methods and apparatus for severing conduits Apparatus for severing a conduit along a plane generally transverse to the axis of the conduit which includes two confined explosive charges aligned axially with the conduit and terminating at opposed proximal convexly shaped ends facing each other across... | 09/22/1981 |
| 4289072 | Earth fracturing apparatus An explosive-containing casing is provided with a cap to which a nipple is secured. The nipple supports a rigid rod which extends the length of the casing and which in turn supports a detonation train for the explosives within the casing. An electrical co... | 09/15/1981 |
| 4273047 | Apparatus for perforating a well and its method of assembly Disclosed is a method and apparatus for attaching shaped charge units into a well perforating gun. The shaped charge unit has an ear shaped extension having a cavity for receiving a wire in the perforating assembly. A second extension is positioned on the... | 06/16/1981 |
| 4253523 | Method and apparatus for well perforation and fracturing operations A method and apparatus for well perforations and fracturing operations includes a shaped charge having a generally spherical container, a conical liner positioned therein, an explosive substantially filling the container around the liner, and a booster ch... | 03/03/1981 |
| 4220687 | Powdered metal casing for perforating charge and its method of manufacture Disclosed herein is a powdered metal casing and an apparatus and method for making the powdered metal casing, which casing is useful for shaped explosive charges for perforating oil and gas wells.... | 09/02/1980 |
| 4220212 | Apparatus for monitoring the operation of well bore guns In the representative embodiment of the new and improved apparatus disclosed herein for monitoring the operation of perforating guns or core-sampling guns carrying one or more electrically-detonatable charges, an impact-actuated monitoring assembly operat... | 09/02/1980 |
| 4193460 | Perforating gun with paired shaped charger vertically spaced A perforating gun for perforating earth formations, primarily in oil and gas wells. The gun includes a straight metal tube in which explosive jet charges are carried. A mounting apparatus within the tube holds the charges in pairs, the pairs being spaced ... | 03/18/1980 |
| 4191265 | Well bore perforating apparatus In the representative embodiment of the present invention disclosed herein, a plurality of generally-cylindrical modular bodies are tandemly assembled within a typical end-loaded perforating carrier. A generally-longitudinal passage containing a detonatin... | 03/04/1980 |
| 4179991 | Perforating gun barrel A perforating gun barrel for carrying a plurality of explosive charges in a spaced apart relationship comprises a plurality of tubular sections positioned with the ends of adjacent tubular sections end-to-end, with the end of one section overlapping the e... | 12/25/1979 |
| 4160412 | Earth fracturing apparatus An earth fracturing apparatus has a casing of reactive metal containing a central, double ended charge load that is simultaneously detonated from both ends; and a pair of opposed end charges at opposite sides of the central charge load, the end charges be... | 07/10/1979 |
| 4151798 | Shaped explosive charge device for underwater use A shaped explosive charge device for underwater use wherein a deflated inflatable element is positioned within the stand-off space and, when the device is in position for firing, for example, as an inside cutter, the inflatable element is inflated to excl... | 05/01/1979 |
| 4140188 | High density jet perforating casing gun A high density perforating gun having series connected multiple gun housings within which a plurality of jet perforating shaped charges are arranged in spaced apart clusters. The charges of each cluster are captured in radially spaced apart symmetrical re... | 02/20/1979 |
| 4116130 | Methods and apparatus for severing tubular members Methods and apparatus for severing tubular members whereby one or more shaped charges are positioned adjacent the interior walls of the tubular members and detonated to thereby sever the tubular members. The apparatus of the invention is adapted to be pla... | 09/26/1978 |
| 4105073 | Tubing conveyed sand consolidating method Method of completing a hydrocarbon containing formation located downhole in a cased borehole by running a jet perforating gun downhole on the end of a tubing string. The tool string includes a vent assembly underlying a packer and located above the gun. T... | 08/08/1978 |
| 4089381 | Chamber isolator and sealing means for borehole perforating tools Improved end closures for shaped charge unit chambers in borehole perforating tools have flanged peripheral portions to be clamped in the threaded joint when sidewalls of adjacent chambers are threadedly joined. Also disclosed are sealing means for conduc... | 05/16/1978 |
| 4071096 | Shaped charge well perforating apparatus Apparatus for perforating a well comprised of a closed retrievable carrier formed in an elliptic cylindrical shape and having shaped charge perforating means disposed therein. Upon actuation of the shaped charge perforating means the ellipticity of the ca... | 01/31/1978 |
| 4069760 | Method for driving a shaft with shaped charges A method of driving a shaft, or tunnel into competent hard rock with shaped charges. An array of shaped charges to nearly conform with the bottom of the shaft, or face of the tunnel, is carried upon a framework which places the charges a proper distance f... | 01/24/1978 |
| 4018293 | Method and apparatus for controlled fracturing of subterranean formations Method and apparatus for controlled fracturing of a portion of the earth's formations intermediate predetermined depths characterized by positioning adjacent the portion to be fractured explosive charges having exteriorly disposed grooves deep enough to e... | 04/19/1977 |
| 4011815 | Safe-handling arming apparatus for perforating guns In the representative embodiments of the safe-handling arming apparatus of the present invention disclosed herein, a spring-biased indicator is cooperatively arranged on an enclosed-carrier perforating gun for visually representing whether an obscured or ... | 03/15/1977 |
| 3991836 | Well bore perforating apparatus In the representative embodiment of the present invention disclosed herein, this new and improved perforating apparatus includes a plurality of encapsulated shaped explosive charges having their forward ends respectively fitted and threadedly secured in a... | 11/16/1976 |
| 3965993 | Well bore perforating apparatus In the representative embodiment of the present invention disclosed herein, this new and improved perforating apparatus includes a unique elongated carrier strip of a ductile steel carrying encapsulated shaped explosive charges having their forward ends f... | 06/29/1976 |
| 3951218 | Perforating apparatus In the representative embodiment of the present invention disclosed herein, shaped charges adapted for installation in a typical end-loaded carrier are respectively provided with a domed annular retainer member of a thin, but substantially rigid and stiff... | 04/20/1976 |
