Matches 101 - 150 out of 417 < 1 2 3 4 5 6 7 8 9 >


Match Document Document Title
6220356 Method and apparatus for well treating  
A well, such as a natural gas well, may be treated to increase production of gas by inserting into the tubing string a water soluble carrier containing a well treating chemical adapted to aerate...
6138753 Technique for treating hydrocarbon wells  
A hydrocarbon producing well is treated by first igniting a gas generating charge in the well to clean out perforations communicating between the casing and the formation without creating high...
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...
6082450 Apparatus and method for stimulating a subterranean formation  
A method for stimulating a subterranean formation which is penetrated by a well bore having casing positioned therein so as to establish fluid communication between the formation and the well...
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...
6009947 Casing conveyed perforator  
A wellbore completion system utilizes casing conveyed devices to establish a fluid communication path between a downhole formation and the casing string. Extendible pistons are mounted in the wall...
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...
5984006 Emergency release tool  
An improved emergency release tool is provided to releasably connect a coiled tubing to one or more downhole tools. The emergency release tool broadly includes a releasable slip for holding a...
5924489 Method of severing a downhole pipe in a well borehole  
A method of severing a downhole pipe for forming a region in the well borehole devoid of downhole pipe for enhancing the performance of a perforating gun comprising the steps of: severing, at an...
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...
5877390 Method for dispersing chemicals and microorganisms into soil using explosives  
A method and apparatus for diffusing a treating agent into a medium, a method and apparatus for injecting a liquid into a medium, and a method of remedying soil. The method of diffusing a treating...
5862862 Apparatus for completing a subterranean well and associated methods of using same  
Apparatus and associated methods of using provide access to a portion of a parent wellbore that has been separated from the remainder of the parent wellbore by a lateral wellbore liner. In a...
5690171 Wellbore stimulation and completion  
A method and device for stimulating and completing a drilled wellbore in a productive formation. The device comprises a pipe having a plurality of weakened portions and containing a propellant...
5689085 Explosive displacing bore hole tube  
An explosive displacing bore hole tube is formed by an elongated tubular member having opposite ends thereof closed, as by caps, to enclose a nonexplosive material within the tube. The...
5632348 Fluid activated detonating system  
A fluid actuated detonating device is shown being used to activate explosive devices in a borehole. The detonating device has an explosive detonation charge arranged in a housing wherein a rupture...
5617921 Over-pressured well fracturing with surface reservoir and actuator system  
Fractures are initiated or extended into fluid producing earth formations from a well by providing a reservoir of high pressure gas at the earth's surface together with a flow control valve or a...
5613557 Apparatus and method for sealing perforated well casing  
Perforations and other openings in well casings, liners and other conduits may be substantially blocked or sealed to prevent fluid flow between the casing or liner interior and an earth formation...
5575331 Chemical cutter  
A downhole chemical cutting tool for cutting downhole tubular goods and supporting the tubular goods within the well through a load bearing hub section in the tool. The tool comprises an elongated...
5564499 Method and device for slotting well casing and scoring surrounding rock to facilitate hydraulic fractures  
Linear apertures are created in well casing through the use of linear charges lowered into the well casing in place; hydraulic fracturing conducted through the linear apertures achieves larger and...
5515924 Technique for restoring or increasing flow to oil and gas wells  
A well, such as an oil or gas well, may be revived and or increase the flow of hydrocarbons from the well, by inserting a surfactant/chemical solution in solid stick form into the wellbore through...
5513570 Pressure actuated pipe cutting tool  
The present invention is a system for severing pipe. The system includes an explosively actuated pipe cutter, a pressure actuated initiator, and a means for suspending the cutter and the initiator...
5467824 Apparatus for and a method of severing multiple casing strings using explosives  
A method of and apparatus for severing multiple concentric casing strings in an abandoned oil or gas well allowing the upper portion of the casing strings to be removed comprising positioning a...
5452763 Method and apparatus for generating gas in a drilled borehole  
The present apparatus and method utilizes a downhole electrolysis process implemented by means of an elongated gas generating apparatus containing an array of cascaded electrolysis cells...
5425570 Method and apparatus for plasma blasting  
Method and apparatus for plasma blasting comprises a capacitor bank for storing electrical charge to which is coupled an inductance which delivers the electric charge as a current through a switch...
5413045 Detonation system  
A detonation system 10 particularly suitable for use in subterranean environments, for example in oil exploration and production, uses a detonating device 2 containing explosive material 3. The...
5396951 Non-explosive power charge ignition  
A wellbore tool is provided to perform work in a wellbore by converting a chemical pressure source into a force exerted over a distance. The wellbore tool includes a pressure chamber sealed by a...
5392860 Heat activated safety fuse  
A method and an apparatus for use in a wellbore are provided to prevent an electrical current from passing between a power supply and an electrically operated downhole well tool until after the...
5355957 Combined pressure testing and selective fired perforating systems  
A system is provided for performing multiple operations on a well in response to multiple fluid pressure increases. The system includes first and second pressure actuated firing heads and a source...
5322118 Downhole chemical cutter  
Chemical cutting tool for use within a well bore for cutting very small diameter tubular goods. The tool has an elongated tool body having anchoring means for anchoring the tool within a conduit...
5318126 Explosively opened production valve including a frangible breakup element operated by tubing pressure or rathole pressure or both  
A production valve includes an outer housing having a production port, a piston disposed within the outer housing and adapted to move from one position to another position, a frangible breakup...
5316087 Pyrotechnic charge powered operating system for downhole tools  
A downhole tool apparatus for use in a well includes a housing having a cylindrical chamber defined therein. A power piston is slidably disposed in the cylindrical chamber and divides the...
5297631 Method and apparatus for downhole oil well production stimulation  
A method and apparatus for stimulating the production zone of an oil well having a high pressure gas gun and a coil tubing conduit to deliver cleaning, stimulating, and cooling liquid to the zone...
5287924 Tubing conveyed selective fired perforating systems  
A system is provided for selectively perforating multiple zones in a well on a single trip into the well. The system includes a tubing string which carries at least a first and a second...
5287920 Large head downhole chemical cutting tool  
A downhole chemical cutting tool for use in a well bore to cut large diameter conduits including an elongated tool body having a chemical section adapted to contain a chemical cutting agent and a...
5273116 Firing mechanism for actuating wellbore tools  
The preferred firing mechanism of the present invention includes a number of components which cooperate together to actuate an electrically-actuable wellbore tool, which is operable in a plurality...
5223665 Method and apparatus for disabling detonation system for a downhole explosive assembly  
A method and apparatus adapted to disable the actuation assembly for a perforating gun or any other detonation device used in subterranean wells to prevent premature surface detonation of the...
5211224 Annular shaped power charge for subsurface well devices  
An annular shaped gas generating power charge is shown of the type which can be used in a downhole tool in a well. The charge is provided in the form of a longitudinal strip of solid propellant...
5205360 Pneumatic well tool for stimulation of petroleum formations  
A pneumatic well tool for fracturing or enlarging perforations in a subsurface formation so that the petroleum in the formation more freely flows. The tool takes the form of an elongate tool body...
5161616 Differential firing head and method of operation thereof  
A differential firing head for a tubing conveyed perforation assembly includes a pressure-balanced firing pin propelled by a separate actuator assembly into a detonator to ignite charges in the...
5117911 Shock attenuating apparatus and method  
An apparatus attenuates a shock, such as an impact load from an explosion, by undergoing plastic deformation and by serially dissipating energy from a plurality of surfaces. In a particular...
5106164 Plasma blasting method  
A blasting method which comprises delivering electrical energy at a rate of at least 100 megawatts per microsecond until a peak power of at least 3 gigawatts is reached across the gap of two poles...
5083615 Aluminum alkyls used to create multiple fractures  
In a gas-generating chemical reaction carried out in a borehole that is largely filled with water, substantial pressure increases can be generated. This pressure can be used to fracture rocks...
5062485 Variable time delay firing head  
The device of the present invention comprises first means for initiating a first combustive reaction which is actuated in response to a first pressure condition in at least a portion of the well...
5054557 Device for extracting a liquid out of a tube of great length  
Device for extracting a liquid out of a tube of great length closed at one of its ends in case a communication between the closed end and a source of a substitution fluid should be difficult to...
5046567 Adiabatically induced ignition of combustible materials  
A method and apparatus for achieving adiabatic heat ignition of combustible material, particularly explosive compositions which involves entrapping a quantity of gas in a chamber which is in...
5024270 Well sealing device  
A well sealing device using an internal propellant charge to drive slip segments outwardly against a well casing. A pin shears, releasing the device from its wire line prior to final setting of...
5007345 Method and apparatus for charging waterlogged boreholes with explosives  
A method of charging waterlogged boreholes with water-resistant particulate explosive material, comprises inserting a pneumatic line with upwardly directed nozzles at the lower end thereof and a...
5005641 Gas generator with improved ignition assembly  
A gas generating type tool includes a propellant charge having an axially extending passage receiving therein an ignition tube containing a quantity of easily ignited, fast burning powder. The...
4997044 Apparatus for generating hydraulic shock waves in a well  
Apparatus for electrically generating hydraulic shock waves in a fluid bearing formation (14) of a bore hole (10) including a tool (16) having an upper electrode (42) and a lower electrode (46)...
4976318 Technique and apparatus for stimulating long intervals  
A gas generating type fracturing tool is designed to work on long productive intervals and includes a series of separate propellant charges, an igniter for initiating combustion of one of the...

Matches 101 - 150 out of 417 < 1 2 3 4 5 6 7 8 9 >