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7284601 |
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 p...
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7284489 |
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 p...
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7246548 |
Embodied herein is a perforating gun wall that withstands short, high energy pulses of an explosion retained within a loading tube with numerous explosive shaped charges. The perforating gun wall includes two or more layers with an impac...
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7121340 |
An apparatus for reducing the post-detonation pressure of a perforating gun, the apparatus including a perforating gun carrying at least one explosive charge, wherein when the explosive charge is detonated the explosive charge produces a...
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7055421 |
A perforating device having a longitudinal axis comprising: a loading tube having an explosive charge; a first layer slidable, non fixedly, and removeably disposed over the loading tube; and at least one outer layer in fixed engagement o...
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7013988 |
A combination for performing a variety of functions includes (a) apparatus for moving a projectile or other mass along an arcuate path and moving the path substantially radially along a local radius of curvature and (b) a tool, vehicle o...
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6966378 |
The present invention provides for a perforating gun having stackable sections that latch, enabling the gun string to carry both compressive and tensile loads. This allows for the downhole assembly of guns of any desired length, and for ...
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6926096 |
The invention relates to a method to use a perforating gun in oil and natural gas wells, comprising: a perforating gun with a loading tube and explosive charge; the gun comprises: a first layer disposed over the loading tube and at least...
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6865978 |
The borehole of many wells, including oil and gas production wells, is frequently cased with a steel or similar metal casing. In order to extract oil or other material existing within the surrounding geologic formation, it is necessary t...
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6772105 |
Methods for evaluating drill pattern parameters such as burden, spacing, borehole diameter, etc., at a blast site are disclosed. One method involves accumulating the burden contributed by successive layers of rock and matching the accumu...
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6454359 |
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 hol...
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6371219 |
A shaped charge is provided which includes features enhancing its manufacturability. In a described embodiment, an oilwell perforator is provided which includes a case and a liner, at least one of which is a molding. The molding has a me...
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6257353 |
The objects of the invention are provided using a method for horizontal drilling in which a shoe having an elbow-shaped cavity therein is lowered to a selected point. An explosive charge is placed at the far end of the shoe adjacent to t...
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5996709 |
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 projecti...
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5765923 |
The present invention is directed to a cartridge for use in fracturing materials, such as rock. The cartridge includes a base member, a body member, a propellant, and a device for sealing a surface of the cartridge to the surface of a ho...
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5436791 |
A perforating gun using an electrical safe arm device and a capacitor exploding foil initiator device. The capacitor exploding foil initiator device having a capacitor connected in parallel to a bleed resistor which are connected across ...
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5421418 |
Prior to pumping completion brine fluid into a wellbore, an additive comprising two percent (2%) of a 0.25% solution of polyacrylamide is blended into the completion brine fluid thereby producing a treated brine fluid. This blending woul...
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5237136 |
In accordance with illustrative embodiments of the present invention, a safety bypass switch for use with explosive well tools includes a hollow conductive body having a copper conductor rod extending axially therethrough, a spring-loade...
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5192819 |
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 ...
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5020591 |
A locking device for a pin and socket interconnection of tubular well tool housings where a locking mechanism has a first rotatably mounted annular locking member on a second locking member on a pin end. The locking members have cooperat...
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4967048 |
In accordance with illustrative embodiments of the present invention as disclosed herein, a safety switch for preventing accidental firing of an explosive well tool includes a tubular metal body connected between the cable head and the w...
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4909152 |
A cartridge for the expulsion of liquids under pressure, including a chamber for a propellent charge and a separating arrangement which is located intermediate the chamber for the propellent charge and a liquid chamber. The separating ar...
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4550786 |
A method for the driving of steel profiles into a rock substratum is described, in which, before the driving, holes are drilled into the rock substratum, in which holes explosive charges are detonated. The explosive charge is so construc...
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4526233 |
A method and apparatus for releasing a subterranean well perforating gun from a tubular string after firing of the subterranean well perforating gun. The apparatus comprises two telescopically inter-related tubular assemblies which are i...
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4165690 |
The invention provides for a drill unit for drilling and charge laying operations and is suitable for operation on land or underwater. The drill unit comprises a rock drill mounted on a frame structure on a gantry and drill steels and ca...
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4123975 |
A projectile having a length to diameter ratio greater than 6 to 1 is propelled from a launcher by a propellant charge toward a rock target at velocities of 500 ft./sec. and higher to more efficiently penetrate the rock for excavation pu...
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4057780 |
The configuration and directional orientation of natural or induced fractures in subterranean earth formations are described by introducing a liquid explosive into the fracture, detonating the explosive, and then monitoring the resulting...
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3623555 |
A method of forming a subterranean cavity communicated with the surface through a drilled hole which includes the steps of drilling a hole from the surface of the ground to the subterranean situs at which the cavity is to be located, sus...
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3583766 |
A method and apparatus for facilitating the extraction of valuable minerals which have settled and solidified to form a hard layer covering the floor of the ocean. The invention is based upon the employment of a high-intensity shock wave...
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3566979 |
The particular embodiment described herein as illustrative of one form of the invention utilizes, in a drilling system, capsules which are moved at high velocities out the eye of the drill bit to be impacted with the formation being dril...
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3404919 |
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3231030 |
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3174561 |
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3115226 |
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3066733 |
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3022729 |
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2988143 |
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2974727 |
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2883931 |
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2756020 |
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2676662 |
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2562880 |
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2457277 |
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2381929 |
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2317544 |
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2259564 |
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2137261 |
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2023831 |
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2016250 |
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1757288 |
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