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6598679 Radial cutting torch with mixing cavity and method  
An apparatus is provided which is adapted to be located in a conduit to be severed. The apparatus includes an upper ignition device, combustible material and a lower nozzle with a diverter. In...
6595289 Method and apparatus for plugging a wellbore  
The present invention provides a method and apparatus for plugging a wellbore in a trip saving manner. In one aspect, the invention includes a cement retainer disposed on a run-in string and a...
6595290 Internally oriented perforating apparatus  
An internally oriented perforating apparatus and associated method of perforating provide increased reliability in orienting perforating charges to shoot in desired directions in a well. In a...
6591911 Multi-directional gun carrier method and apparatus  
A perforating device has a carrier strip (e.g., a linear strip) on which are mounted capsule charges arranged in a desired pattern. The pattern can be a phased pattern, such as a spiral pattern, a...
6591912 Full bore automatic gun release module  
A perforation gun is secured to the inside bore of a well completion tube by a releasable connection module. The connection module mechanism includes radially expanding anchor dogs that are...
6588508 Method and apparatus to reduce trapped pressure in a downhole tool  
A tool string for use in a well includes a filter sub (or trapped pressure regulator sub) that is used with other components to reduce trapped pressure. The filter sub filters out debris that may...
6578635 Lining removal method, system and components thereof  
A method of removing lining from a tubing in a well includes: reaming at least a portion of the lining material; cutting at least a segment of the lining along a spiral path; engaging the lining...
6568474 Rigless one-trip perforation and gravel pack system and method  
A method of perforating and gravel packing a wellbore casing, having the following steps: (1) making-up to a pipe string: a packer, a screen, and a perforating apparatus; (2) running-in the pipe...
6557636 Method and apparatus for perforating a well  
A method and apparatus for perforating tubular members coaxial outside and inside surfaces with a continuous wall extending therebetween attaches at least one explosive charge in direct contact...
6557650 Method and apparatus for protecting explosives  
A method and apparatus to protect explosive components used in various tools, such as tools for use in wellbores, includes a component with an adsorptive material. Example tools include...
6543538 Method for treating multiple wellbore intervals  
This invention provides a method for treating multiple intervals in a wellbore by perforating at least one interval then treating and isolating the perforated interval(s) without removing the...
6536532 Lock ring for pipe slip pick-up ring  
A selectively released well packer is set between a pair of anchor shoe assemblies. Each assembly comprises a tubular setting sleeve having finger projections meshed with an anchor shoe cage....
6536524 Method and system for performing a casing conveyed perforating process and other operations in wells  
A method for performing operations and for improving production in a well includes the steps of: locating a process tool at a required depth in the well, placing a reader device in the well...
6523449 Perforating gun  
A technique includes arranging perforating charges of a perforating gun into groups of adjacent perforating charges. Each perforating charge of each group is aligned in a direction associated with...
6520258 Encapsulant providing structural support for explosives  
An apparatus and method is provided to provide structural support for explosives (e.g., shaped charges) in a tool (e.g., a perforating gun). An encapsulant surrounds at least portions of the...
6508307 Techniques for hydraulic fracturing combining oriented perforating and low viscosity fluids  
The present invention relates to novel methods to stimulate a hydrocarbon-bearing formation; in particular, techniques are disclosed for shooting perforations aligned with the direction of...
6497285 Low debris shaped charge perforating apparatus and method for use of same  
A shaped charge perforating apparatus (50) for perforating a subterranean well is disclosed. The shaped charge perforating apparatus (50) comprises a support member (62) having a plurality of...
6497284 Single trip perforating and fracturing/gravel packing  
A well completion system and associated methods of completing wells provides enhanced convenience in well completions involving well treatment operations. In a described embodiment, a single trip...
6494261 Apparatus and methods for perforating a subterranean formation  
Apparatus and methods for perforating a subterranean well are provided. In general perforating apparatus, including a pre-weakend casing apparatus and a propellant assembly, is deployed within a...
6491098 Method and apparatus for perforating and stimulating oil wells  
Perforation and stimulation of a plurality of selected sections of a cased well is completed with a single insertion of a well tool. The process includes successive stages of perforating and...
6478088 Method for the formation of a plug in a petroleum well  
The invention relates to a method for the formation of a plug (1) in a petroleum well (2) extending from the earth's surface or the sea floor to a petroleum reservoir, which well is lined with...
6478086 Method for installing a sensor in connection with plugging a well  
A method for plugging wells for use in connection with extraction of a fluid. Above a leakage site in the well, from which the fluid flows into the well from a subsurface formation surrounding the...
6474415 Method and apparatus for milling openings in downhole structures  
A whipstock-less milling apparatus and method for use in a wellbore having a first structure (e.g., a tubular structure such as a casing, liner, or other tubular structure) includes a support...
6435278 Firing head/perforating gun latching system and associated methods  
A latching system permits a firing head to be lowered into a wellbore and reliably coupled to a perforating gun previously lowered into the wellbore. In a disclosed embodiment thereof, the...
6412415 Shock and vibration protection for tools containing explosive components  
A method and apparatus for use in a wellbore includes explosive components, a housing containing the explosive components, and at least one protection barrier mounted on the housing to reduce...
6401818 Wellbore perforation method and apparatus  
A method and apparatus is described for increasing hydrocarbon production from a production well by determining a bedding plane (permeability anisotropy) of a hydrocarbon bearing formation and...
6397947 Optimizing charge phasing of a perforating gun  
A method includes arranging shaped charges in a perforating gun to produce perforation holes in a helical pattern that is defined in part by a phase angle; and choosing four adjacent perforation...
6386296 Method and apparatus of protecting explosives  
A method and apparatus to protect explosive components used in various tools, such as tools for use in wellbores, includes a component with an adsorptive material. Example tools include...
6378607 Method and system for oriented perforating in a well with permanent sensors  
A method and system is provided for perforating a casing in a hydrocarbon well so as to avoid perforating in a direction where a cable resides. A mass of metallic material is clamped to the casing...
6364017 Single trip perforate and gravel pack system  
An improved single trip perforating and gravel pack system is provided which includes a tubing conveyed perforating assembly, a gravel pack completion assembly, and a retrievable service assembly....
6354374 Method of performing downhole functions  
A downhole device and method for performing a function in a well. The device has a series of dedicated hydro-mechanical locks that prevent occurrence of an associated function. The...
6347673 Perforating guns having multiple configurations  
A perforating gun system includes shaped charges and a carrier housing containing the shaped charges and having a pattern of scallops (or other forms of perforating jet passageways). The shaped...
6336506 Apparatus and method for perforating and stimulating a subterranean formation  
A method and apparatus for perforating and stimulating a subterranean formation which is penetrated by a well bore having casing positioned therein so as to establish fluid communication between...
6325148 Tools and methods for use with expandable tubulars  
Methods, apparatus and tools to be used with tubular expansion apparatus. In one aspect of the invention, tools are actuated or operated within a well by selectively expanding the tool wall. To...
6315043 Downhole anchoring tools conveyed by non-rigid carriers  
An apparatus and method provides an anchor device for use in a wellbore that comprises an actuator assembly responsive to an actuating signal, an operator coupled to the actuator assembly, and an...
6298915 Orienting system for modular guns  
A stinger is fabricated with an orientating key. The stinger is lowered into a wellbore and remains atop a downhole assembly. The angular orientation of stinger with respect to the downhole...
6289991 Downhole apparatus  
Apparatus for perforating a section of liner intersecting a hydrocarbon-bearing formation comprises a length of tubing, the wall of the tubing defining a plurality of apertures, and perforating...
6283214 Optimum perforation design and technique to minimize sand intrusion  
The present Invention relates to novel devices and methods to minimize the production of sand in subterranean environments; in particular, in poorly consolidated formations, sand is often...
6273187 Method and apparatus for downhole safety valve remediation  
In a broad aspect, the invention relates to a method and apparatus for downhole safety valve remediation using a measured, controlled, explosion to remove scale and/or other debris from within or...
6220370 Circulating gun system  
A tubing conveyed perforating apparatus is shown which includes a tubular firing section which carries a plurality of explosive charges. The explosive charges are initially aligned with regions of...
6213210 Removal of lining from tubing  
A cutting tool and a rotatable removal tool can be used together in a system and method for removing lining from tubing in a well. A particular cutting tool includes a mandrel, a sleeve mounted on...
6209644 Assembly and method for forming a seal in a junction of a multilateral well bore  
This invention relates to an assembly and method for forming a hydraulic seal at the junction of a multilateral well bore drilled through a window in at least a main well bore comprising a tubular...
6206100 Separable one-trip perforation and gravel pack system and method  
A system and method for perforating and gravel packing a wellbore casing in a single trip into the wellbore comprising a gravel packer assembly having a production screen and at least one packer....
6186226 Borehole conduit cutting apparatus  
The apparatus of the invention is used for severing a metal conduit disposed in a borehole extending downward into the earth. The apparatus includes a body adapted to be lowered into the metal...
6173773 Orienting downhole tools  
A method and apparatus of orienting a tool in a wellbore includes running an orientation string into the wellbore, the orienting string including a positioning device, a measurement device (e.g.,...
6173779 Collapsible well perforating apparatus  
A well perforating apparatus has a first perforating gun section, a second perforating gun section, and a longitudinally collapsible unitary section connected between the first and second...
6158505 Blade seal for a shearing blind ram in a ram type blowout preventer  
A blade seal for a shearing blind ram designed for use in a standard ram-type blowout preventer used in oil and gas drilling operations is disclosed. The blowout preventer has a body with an axial...
6148916 Apparatus for releasing, then firing perforating guns  
A perforating gun can be conveyed on tubing and fired while disconnected from the tubing. The gun is retained to a running tool at the lower end of the tubing in a locked position. Actuating a...
6142231 One-trip conveying method for packer/plug and perforating gun  
A one-trip system for placement and setting a downhole packer or plug is disclosed. The packer is settable in a variety of ways, including hydraulically, acoustically by pressure pulse signals, or...
6135206 Apparatus for completing a subterranean well and associated methods of using same  
Apparatus and associated methods of using provide convenient and economical forming of an opening through a tubular structure in a subterranean well. In a preferred embodiment, an apparatus has a...