Matches 301 - 350 out of 396 < 1 2 3 4 5 6 7 8 >


Match Document Document Title
5592991 Method and apparatus of installing a whipstock  
A one-trip system for milling a window using a whipstock is disclosed. The whipstock can be set on a packer or anchor which can be an electric line-type packer which, without modifications, can be...
5522461 Mill valve  
A downhole wellbore tool has been developed which has a lower movable valve apparatus which, when it contacts a member in a wellbore or in a tubular in a wellbore, is moved to close off fluid flow...
5499678 Coplanar angular jetting head for well perforating  
A coplanar jetting head for well perforating. The apparatus comprises a housing defining a plurality of jetting openings therein. The jetting openings are substantially coplanar and are angularly...
5472052 Method of abandoning a well and apparatus therefor  
The invention relates to a method of abandoning a well which has ceased to provide economic use. The method includes pressurizing the well fluids through the production tubing including optionally...
5458196 Through tubing gun hanger  
A gun hanger for emplacement through a tubing string into a casing string, comprising an inner mandrel, a setting means slidably received on said mandrel, said setting means including a plurality...
5392858 Milling apparatus and method for well casing  
A well penetrator consists of a number of hydraulic fluid control components and a carriage carrying a hydraulic motor and a mill bit supported in a housing which is moveable down a well casing....
5381631 Method and apparatus for cutting metal casings with an ultrahigh-pressure abrasive fluid jet  
A method and apparatus for cutting metal casings with an ultrahigh-pressure abrasive fluid jet is shown and described. Examples of such casings include piles and conductors of offshore oil...
5366015 Method of cutting high strength materials with water soluble abrasives  
Method of forming openings in structural substrates, especially oil and gas well casings, by providing a supply of a preselected liquid and providing a supply of preselected abrasive particles...
5337825 Method of oil well productivity increase  
Oil wells productivity is increased by cyclically treating a shaft-adjacent zone of the well with a seam-forming liquid which contains additional activating components.
5335724 Directionally oriented slotting method  
A method of fracturing a subterranean formation having a well bore extending thereinto. The method comprises the steps of: (a) placing a jetting tool in the well bore such that the jetting tool is...
5327970 Method for gravel packing of wells  
A well penetrator has a housing moveable down a well casing with a radially moveable punch being supported in the housing for movement between retracted and extended positions; a fluid jet is...
5303776 Device for a down-hole assembly  
A wireline conveyable device for a fluid operable borehole tubing assembly comprising a tubular body having a first end intended to form the upper end when in the borehole and a second open end...
5253710 Method and apparatus to cut and remove casing  
An apparatus is established which facilitates the cutting and removal of well casing on a single trip into the wellbore. The apparatus is run into the wellbore on the tubing string and provides a...
5238063 Pressure balanced charge container for wellhead severing system  
A wellhead severing system for detonating a liquid explosive charge and subsequent removal of the wellhead from the sea floor. The explosive severing system includes a charge container holding a...
5217073 Cut-and-close device for pressure pipes in production and supply installations  
A cut-and-close device for pressure pipes in production and supply installations for gaseous and liquid media includes a two-piece clamping block. A pipe-cutting and pipe-closing plate is driven...
5215148 Subsurface well pressure actuated and fired apparatus  
A firing apparatus for use with a tubing-conveyed perforating apparatus is disclosed. Wellbore pressure applies an upward force to a first piston connected by a shearable coupling to a firing...
5183111 Extended reach penetrating tool and method of forming a radial hole in a well casing  
An extended reach penetrating tool which includes a tubing string lowered into a casing, anchored in position and including a cutting tool for forming a lateral hole in the casing. A formation...
5161617 Directly installed shut-off and diverter valve assembly for flowing oil well with concentric casings  
An apparatus for installing a selectively reopenable shut-off valve into an oil well casing of the type having an outer production casing and an inner production pipe suspended therein including a...
5156212 Method and system for controlling high pressure flow, such as in containment of oil and gas well fires  
A system for controlling and extinguishing oil and gas well fires, as well as a system for remotely controlling flow of a pipeline. The system of the present invention encapsulates a section of...
5154231 Whipstock assembly with hydraulically set anchor  
A one-trip whipstock assembly incorporating a hydraulically set anchor which includes an interlock for maintaining the anchor in its set position upon interruption of hydraulic pressure. The...
5090480 Underreamer with simultaneously expandable cutter blades and method  
An underreamer tool has a body with upper and lower portions having an upper cutter blade slot extending transversely through the upper portion and a lower cutter blade slot extending transversely...
5076730 Earth duct tunnel enlargement apparatus and method  
A method of and an apparatus for relieving ground pressure surrounding pvc vent pipes which have been displaced from their T-fitting traps in sewer systems. The round tubular nature of a...
5054555 Tension-actuated mechanical detonating device useful for detonating downhole explosive  
The tool is a mechanically operated detonating device that is actuated by tension. The device is run into a hole on a slick line or tubing and latched. When a predetermined upward pull is provided...
5036921 Underreamer with sequentially expandable cutter blades  
An underreamer tool has a body with upper and lower portions having an upper cutter blade slot extending transversely through the upper portion and a lower cutter blade slot extending transversely...
5027903 Coiled tubing velocity string hangoff method and apparatus  
A method and apparatus for hanging off a coiled tubing velocity string in an existing, active gas production well. The method allows for the "hot" tapping into a charged coiled tubing run thereby...
5018580 Section milling tool  
A milling machine is set forth for operation on a pipe string in a cased well to mill the casing. In one embodiment, an inner mandrel having a shoulder is aligned relative to a set of first...
5010955 Casing mill and method  
A casing mill for milling pipe cemented in an oil well comprises a body with a plurality of fixed milling blades having a diameter corresponding to the outside diameter of the pipe to be milled,...
4981177 Method and apparatus for establishing communication with a downhole portion of a control fluid pipe  
A downhole tool, such as a safety valve or a stand-alone nipple, has a tubular housing. An axially extending bore is provided in the wall of the housing. A radially extending recess is provided in...
4949789 Pressure relief system for down hole chemical cutters  
An improvement in chemical cutting apparatus for use down within a well bore comprising improved means of discharging a cutting agent in conjunction with an automatic means of pressure relief. The...
4889187 Multi-run chemical cutter and method  
Disclosed are a method and an apparatus for cutting conduits. The apparatus includes a cutting head adapted for insertion in the conduit. The cutting head has at least one nozzle. The cutting head...
4830120 Methods and apparatus for perforating a deviated casing in a subterranean well  
Improved method and apparatus are provided for perforating casing located in a deviated portion of a subterranean well. The direction toward which the explosive charges in the downhole perforating...
4790384 Hydraulic well penetration apparatus and method  
A well casing penetrator includes an elongated housing enclosing an outwardly movable hydraulic cylinder driven punch for cutting an opening in a casing. A high pressure liquid jet nozzle is...
4716970 Oil or gas well workover technique  
A hydrocarbon producing well is worked over by wire line tools only to run a jet pump into the tubing string by perforating the tubing string and then isolating the perforation to direct power...
4703802 Cutting and recovery tool  
A cutting and recovery tool for a well-head, having a housing which is adapted to engage with a side wall of the well-head to lock them together, and a mandrel extending through the housing and...
4640362 Well penetration apparatus and method  
A well casing penetrator includes an elongated housing enclosing an outwardly movable hydraulic driven punch for cutting an opening in a casing. A high pressure liquid jet nozzle is mounted on the...
4476935 Safety valve apparatus and method  
A safety valve for controlling flow in a flow line is disclosed which is especially adapted for use in emergency control of a producing well. The apparatus includes means for securing a punch out...
4428430 Chemical method and apparatus for perforating drill collars  
Discloses a method and apparatus to help provide fluid pressure in a well bore sufficient to overcome in situ earth formation pressures by perforating a circulation port through the sidewall of a...
4428431 Perforable screen device for subterranean wells and method of producing multi-lobe zones  
A screen device is provided for use in a subterranean well and is carriable within the well on a tubular conduit. The screen has an elongated outer housing with a plurality of flow passageways...
4406499 Method of in situ bitumen recovery by percolation  
Bitumen is recovered from an underground tar sands (oil sands) formation by an in-situ percolation process. After drilling a borehole to the bottom of the tar sand formation, the hole is enlarged...
4369845 Oil well blow-out control  
A tool jig for bringing an implement to bear on an inner tubular 10 of a multi-tubular blown well includes a support 1 attachable to the outer tubular 2 and a tool holder 12. The tool holder has a...
4346761 Hydra-jet slotting tool  
The present invention relates to an apparatus for controlling the rate and extent of cutting slots in flow conductors, particularly casing in wells. The apparatus is hung in the well from a pipe...
4182418 Method for perforating water well pipe casings  
A tool for perforating water well pipe casings is disclosed. The tool is designed for use with air rotary water well drilling apparatus. The tool includes a slideable casing perforator wheel...
4165784 Casing perforator  
The present invention involves a tool for connection to a conventional drill string and operation therewith for punching holes in a standard casing located within a well bore to pass water or gas...
4158388 Method of and apparatus for squeeze cementing in boreholes  
A well tool system including a device for downhole suspension by means of conduit for engaging and penetrating the casing wall of a wellbore and introducing a fluid into the adjacent penetration....
4144936 Down hole milling or grinding system  
Apparatus is disclosed for milling metal submerged in salt water or within a hole, such as cutting off the upper ends of pipes and casings in a well-drilling operation below the sea floor. A...
4134453 Method and apparatus for perforating and slotting well flow conductors  
Apparatus and a method for cutting round perforations and elongated slots in well flow conductors used in solution mining. The apparatus comprises a jet nozzle head for discharging a fluid to cut...
4119148 Perforating apparatus and method for well casing  
An apparatus and method for perforating a well casing. The apparatus includes a drilling mechanism comprising an air-operated drill mounted between forward and rear frame members, a drill bit...
4119151 Casing slotter  
A drill string mounted tool for cutting a pair of spaced, vertical slots in well tubular goods comprising a pair of knives adapted to be swung outwardly, scissors style, by a piston member, which...
4050529 Apparatus for treating rock surrounding a wellbore  
An apparatus for treating rock surrounding a wellbore comprises a hollow elongated housing having nozzles radially mounted therein, which are projectable externally thereof. Each nozzle has a...
4047569 Method of successively opening-out and treating productive formations  
In the disclosed method of successively opening-out and treating formations, nozzles are firmly pressed against the casing walls in opposition to the selected area of forming a hydraulic fracture,...

Matches 301 - 350 out of 396 < 1 2 3 4 5 6 7 8 >