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6135205 Apparatus for and method of hydraulic fracturing utilizing controlled azumith perforating  
A method of perforating a subterranean formation penetrated by a bore hole and having a multiplicity of strata including a hydrocarbon bearing target strata, with the strata oriented with the dip...
6131662 Methods of completing wells utilizing wellbore equipment positioning apparatus  
Methods of completing wells utilizing wellbore equipment positioning apparatus provide repositioning of sand control screens and perforating guns without requiring movement of a packer in the...
6116343 One-trip well perforation/proppant fracturing apparatus and methods  
In a subterranean well a one-trip production zone perforation and proppant fracturing operation is carried out using a workstring-supported perforation gun lowered into a casing nipple located in...
6098716 Releasable connector assembly for a perforating gun and method  
An apparatus for releasably coupling a perforating gun to a string includes a tubular member to couple the perforating gun to the string and a latch. The latch connects the perforating gun to the...
6095247 Apparatus and method for opening perforations in a well casing  
An apparatus for opening perforations in a casing string. The casing string has a special casing section defining a plurality of holes therethrough. Rupturable ceramic discs or inserts are...
6085843 Mechanical shut-off valve  
A shut-off valve is disclosed for use in a downhole string of tools in a well. The valve has a housing adapted to be connected between adjacent tools of the string, defining a bore and a passage...
6076601 Collapsible cutter apparatus and method for cutting tubular members  
In accordance with the present invention, a collapsible cutter assembly is provided that utilizes opposing collapsible assemblies having explosive charges coupled thereto. The collapsible cutter...
6065540 Composite coiled tubing apparatus and methods  
Products and methods relating to composite materials and their use in coiled tubing is disclosed. The composite tubing is a pressurized means of conveying fluids downhole in a wellbore. It...
6062310 Full bore gun system  
A tubing conveyed perforating apparatus is shown which includes a tubular assembly made up of a plurality of tubular sections. A plurality of explosive charges are located within the interior bore...
6056055 Downhole lubricator for installation of extended assemblies  
The wellbore is adapted for use as a lubricator for assembly of lengthy installations. The subsurface safety valve is used in conjunction with a nipple inserted into the wellbore and held in...
6053247 Method and apparatus for severing a tubular  
An apparatus and method for severing a tubular, such as a drill string, which is stuck within a subterranean well bore. A volume of liquid explosive is positioned within a housing and initially...
6032739 Method of locating wellbore casing collars using dual-purpose magnet  
A method for sensing the location of a casing collar within a wellbore and for orientating a tool circumferentially and radially employs the use of a compact dual-purpose magnet. The method...
6024168 Wellborne mills & methods  
A wellbore mill has been invented that has a body having a top and a bottom and a first fluid flow channel extending longitudinally therethrough from top to bottom, the first fluid flow channel...
RE36526 Retrievable through tubing tool and method  
Retrievable window cutting apparatus and method include a whipstock assembly 160 and anchor assembly 10. Whipstock assembly 160 and anchor assembly 10 contract radially inwardly to pass through...
6012526 Method for sealing the junctions in multilateral wells  
Junctions in multilateral well structures are sealed by employing a variety of degrees of premachined components and a variety of sealing embodiments, including casing segments having premachined...
6012525 Single-trip perforating gun assembly and method  
Disclosed is an improved apparatus and method for perforating subterranean wells having a centralizer changeable from a running condition to a collapsed condition.
6006833 Method for creating leak-tested perforating gun assemblies  
Methods are provided which permit pressure tested multiple perforating gun modules to be interconnected into gun assemblies, without disturbing any pressure-bearing seals of the modules. Prior to...
6003599 Azimuth-oriented perforating system and method  
An apparatus for positioning a tool, such as a perforating gun, in a wellbore to orient the tool in a desired direction. An anchor having a first reference terminal is set in the wellbore, the...
5992523 Latch and release perforating gun connector and method  
A perforating gun connector is provided for downhole use in oil and gas fields. The perforating gun connector includes a stinger and a stinger receptacle. The stinger is adapted to be stabbed into...
5992289 Firing head with metered delay  
A method of delaying detonation of an explosive device within a subterranean well is provided which is convenient, economical and efficient in its use. In addition, the safety of such operations...
5971072 Inductive coupler activated completion system  
A well completion apparatus disposed in a wellbore having first and second tubings and a tool disposed in the second tubing. An inductive coupler has a male coil located in the first tubing and is...
5964294 Apparatus and method for orienting a downhole tool in a horizontal or deviated well  
A tool for performing a downhole function in a horizontal or highly deviated well has a downhole structure with a longitudinal axis and constructed to turn about the axis in response to a moment...
5960882 Dual-ended apparatus for cutting openings in lined conduits  
A motor with a single driven shaft and double-ended collet is attached to a movable work unit for cutting laterals in a lined pipeline. The motor is preferably operated by an operator at a remote...
5960894 Expendable tubing conveyed perforator  
The invention is directed to an expendable tubing conveyed perforator, comprising (a) an outer tube made from a material having high strength and low impact resistance; and (b) an inner structure...
5951221 Apparatus for in-pipe use  
Apparatus for cutting a hole through a plastic liner in a gas or other main comprises a body forming module of a train of modules adapted to travel through the main. The body has a radially...
5934377 Method for isolating hydrocarbon-containing formations intersected by a well drilled for the purpose of producing hydrocarbons therethrough  
A method for isolating subterranean formations or zones intersected by a single wellbore is provided. The method comprises perforating a zone intersected by the wellbore and pumping a sealing...
5911277 System for activating a perforating device in a well  
Apparatus and method for activating a device in a well, such as firing a perforating gun in a well. An electrically-activated firing system is coupled to an actuating assembly, which includes a...
5908365 Downhole triggering device  
A self-contained tool incorporates an electronic system for significantly reducing the number of batteries required to detonate an explosive downhole, making the tool short enough for transport by...
5890539 Tubing-conveyer multiple firing head system  
An apparatus for sequentially performing multiple downhole functions in a well has tubing arranged to transmit pressure conditions from the surface of the well, upper and lower hydraulically...
5890536 Method for stimulation of lenticular natural gas formations  
A method for stimulating production from wells drilled into natural gas reservoirs characterized by lenticular deposits. The reservoir thickness through which the wells are drilled is divided into...
5874386 Method for cleaning drilling fluid solids from a wellbore using a surfactant composition  
A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided drilling fluid solids from a wellbore using a composition containing an alkyl polyglycoside,...
5848646 Well completion apparatus for use under pressure and method of using same  
A completions insertion and retrieval under pressure (CIRP) apparatus utilizes a snaplock connector to assemble uphole a tool string of any desired length prior to lowering the tool string into a...
5829538 Full bore gun system and method  
A tubing conveyed perforating apparatus is shown which includes a tubular assembly made up of a plurality of tubular sections. One or more elongate charge holders are located within the interior...
5813463 Method of completing welbores to control fracturing screenout caused by multiple near-welbore fractures  
In the preferred embodiment of the present invention, completion operations are performed which include a perforation operation followed by a fracturing operation. During the perforation operation...
5803175 Perforating gun connection and method of connecting for live well deployment  
A connector is presented for tubing conveyed perforating guns which facilitates connection or disconnection between guns without the need for rotation. A latching mechanism is disclosed which...
5799732 Small hole retrievable perforating system for use during extreme overbalanced perforating  
A slickline conveyed perforating method and apparatus is adapted to be disposed in an extremely small diameter cased borehole, especially during extreme overbalanced perforating conditions, and...
5775426 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...
5765642 Subterranean formation fracturing methods  
Methods of fracturing subterranean formations are provided. The methods basically comprise positioning a hydrajetting tool having at least one fluid jet forming nozzle in the well bore adjacent...
5720348 Apparatus and method for cutting wire  
A device for cutting a wire line is disclosed. Generally, the device comprises a tubular member having an inner diameter therethrough for placement of the wire line. A power mandrel is associated...
5720344 Method of longitudinally splitting a pipe coupling within a wellbore  
A method of removing a pipe string anchored in cement within a wellbore involves the use of a coupling cutter having a linear charge that is magnetically oriented radially and rotationally within...
5704426 Zonal isolation method and apparatus  
A new zonal isolation method and apparatus perforates a plurality of zones of a formation, while isolating each perforated zone from every other zone, with one trip into wellbore, and without...
5701957 Well perforator isolation apparatus and method  
Disclosed is an improved apparatus and method for performing downhole operations to a subterranean formation while isolating the formation from the remainder of the well bore. The invention...
5696058 Solids-free, essentially all-oil wellbore fluid  
A solids-free, essentially all-oil wellbore fluid comprises an organic fluid having (i) a melting point less than about 20° C. (about 68° F.), (ii) a flash point greater than about 54.4° C. (about...
5680905 Apparatus and method for perforating wellbores  
An apparatus for actuating a firing head is disclosed. The apparatus contains a firing head that is operatively connected to a detonating cord of a perforating gun containing a series of shaped...
5669448 Overbalance perforating and stimulation method for wells  
A method of stimulating a well subsequent to the formation of perforations whereby, subsequent to the perforating, pressure is suddenly applied to the perforations at a pressure above the...
H001675 Hybrid capsule charge  
An improved capsule-type charge for use in perforating high temperature production zones in oil or gas wells is disclosed. The improvement consists of using a secondary initiating compound as an...
5662170 Method of drilling and completing wells  
A method and assembly for completing a well is disclosed. Generally, the method comprises the steps of positioning a stationary string in the well at a first position. The stationary string will...
5660232 Liner valve with externally mounted perforation charges  
The apparatus and method of the present invention involve a casing or liner component that has a sliding sleeve operable therein. A plurality of ports are plugged off externally to the liner. A...
5649595 Milling method for liners extending into deviated wellbores  
An apparatus and method of milling a liner extending from a deviated wellbore into a main wellbore is disclosed. The liner is inserted through a window and cemented in place with the cement...
5638901 Spiral strip perforating system  
A perforating gun having an elongated, spiral strip with an outer surface, cylindrical about a longitudinal axis, and a diameter sized for convenient entry and removal from a well. The strip has a...