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4501330 Well completion apparatus and method  
A production casing string is composed of an upper section and a smaller diameter lower section. The lower portion of the upper section forms upper and lower polished bore receptacles. The upper...
4499951 Ball switch device and method  
A tubing string extends downhole in a cased borehole to a jet perforating gun. A packer device is located uphole of a releasable coupling apparatus. The coupling apparatus has an annular piston...
4498541 Method of well completion  
A perforating gun is suspended downhole in a cased borehole, in underlying relationship relative to a packer device, and adjacent to a hydrocarbon-bearing formation to be completed. A connecting...
4496008 Well perforating apparatus  
The apparatus comprises an elongated support (22) having a series of flat-faced portions and explosive charges (23) mounted perpendicular to the flat faces. Detonating cords are connected to the...
4494601 Downhole chemical cutting tool  
A downhole chemical cutting tool having an improved cutting section. The tool comprises an elongated tool body adapted for insertion into a well bore and includes anchoring means actuatable...
4488597 Pump-down stinger assembly method and apparatus  
A pump-down stinger assembly method for use with a well-logging tool or well bore perforator suspended from a well-logging cable utilizes a stinger adaptor which releasably attaches a length of...
4485870 Method and apparatus for conducting wireline operations in a borehole  
For conducting wireline operations in a deviated borehole, a dual or two-stage locomotive pulls a wireline cable through both the entire length of a drill string and the entire length of a stinger...
4484628 Method and apparatus for conducting wireline operations in a borehole  
For conducting wireline operations in a deviated borehole, a dual or two-stage locomotive pulls a wireline cable through both the entire length of a drill string and the entire length of a stinger...
4484639 Method and apparatus for perforating subsurface earth formations  
Method and apparatus for completing sursurface formations traversed by a borehole. A perforating gun and a firing head assembly are run into the borehole on the end of a tubing string. A...
4478284 Jar tool  
A jar tool for use in a drill string for use in dislodging a drill bit or well-tools trapped in well bores. The tool comprises an outer housing adapted to move longitudinally with respect to an...
4478294 Positive fire indicator system  
A positive fire indicator well perforating system is disclosed. Predetermined time delay is introduced in a downhole series sequentially fired string of well perforating guns. Surface transducers...
4446920 Method and apparatus for perforating or cutting with a solid fueled gas mixture  
A method for cutting pipe casings and concrete liners or perforating the same and localized portions of surrounding strata in an earth bore is set forth wherein a gas phase cutting or perforating...
4445574 Continuous borehole formed horizontally through a hydrocarbon producing formation  
A borehole is formed down into the ground and extends towards an underlying pay zone, and then is turned horizontally through the pay zone, and then continues back up towards the surface of the...
4436155 Well cleanup and completion apparatus  
A well cleanup and completion apparatus and technique. A packer is located downhole in a borehole, and a tool string comprising a one-way vent assembly and a one-way circulating valve assembly is...
4420042 Method for cutting and replacing tubing without killing well  
A method of running and pulling a siphon tube from a well while the well is under complete pressure control in which the siphon tube is run through a special stack, cut off and suspended in the...
4397355 Whipstock setting method and apparatus  
A whipstock setting apparatus including a whipstock with an anchor-packer connected on its lower end and a cutter releasably connected to the upper end of the whipstock with a fluid line...
4378844 Explosive cutting system  
Disclosed are method and apparatus for cutting tubular members from the inside by use of an explosive-induced shock wave. In a particular disclosed embodiment, an electric detonator is used to...
4378845 Sand control method employing special hydraulic fracturing technique  
A novel sand control method is disclosed wherein high viscosity, high sand concentration, fracturing fluids are pumped through sets of vertically oriented perforations in borehole casings located...
4372384 Well completion method and apparatus  
Method and apparatus for completing a highly unconsolidated formation located downhole in a cased borehole in one trip. A tool string is run downhole into the borehole on the end of a tubing...
4354433 Apparatus for cutting pipe  
The invention pertains to an improved annular shaped charge of a type to be used in the shaped charge carrier of pipe cutting or severing apparatus. The improved annular shaped charge is made up...
4352397 Methods, apparatus and pyrotechnic compositions for severing conduits  
Methods of severing conduits along planes extending transversely to the axis thereof comprising confining a fuel composition within a fuel chamber in an elongated housing sized for insertion in a...
4345646 Apparatus for chemical cutting  
A cylindrical downhole chemical jet cutting tool including a generally cylindrical slip body having pipe gripping slips connected to a co-axially disposed expandable piston-cylinder biased toward...
4339000 Method and apparatus for a bridge plug anchor assembly for a subsurface well  
A method of fabrication and the resulting structure for an economical and reliable anchor assembly to retain a conventional bridge plug within the production casing of an oil or gas well. The...
4306622 Apparatus and method for down-hole retrieval of pumping equipment  
An apparatus and method for retrieving a downhole pump consisting of using a cylindrical carrier member with a pivoted grasping and severing arm which is on the cylindrical carrier, to grasp and...
RE30829 Casing perforation method and apparatus  
Method and apparatus for effecting perforation of a well casing with a casing gun while maintaining pressure in the well bore at a lower level than the pressure in the surrounding reservoir at the...
4299287 Bar actuated vent assembly and perforating gun  
A casing gun is suspended downhole adjacent to a hydrocarbon containing formation by attaching the gun to the end of a tubing string. A packer device isolates the lower downhole casing annulus...
4298063 Methods and apparatus for severing conduits  
Apparatus for severing a conduit along a plane extending transversely through the conduit which includes an elongated housing forming a pair of longitudinally spaced-apart fuel chambers...
4287952 Method of selective diversion in deviated wellbores using ball sealers  
There is disclosed a method for selective diversion in a deviated wellbore comprising generally perforating the casing with a first group of perforations at the top or bottom abutting an imaginary...
RE30711 Well completion method and system  
A well completion method is provided wherein an inflatable packer is positioned in an open borehole of a well opposite a formation from which or into which a fluid is to flow. Cement is then...
4278127 Apparatus for retrieving drill collars  
An apparatus for retrieving drill collars in an earth boring drill string when stuck. A sub is connected between two drill collars at various points. Each sub is a cylindrical member with a...
4262747 In situ recovery of gaseous hydrocarbons and steam  
In situ (subsurface) methods and devices are described for releasing gaseous hydrocarbons and steam from solution in water or brine, from captured bubbles in formation pores, and from hydrate...
4253523 Method and apparatus for well perforation and fracturing operations  
A method and apparatus for well perforations and fracturing operations includes a shaped charge having a generally spherical container, a conical liner positioned therein, an explosive...
4237976 Hydraulic well pumping method  
Production tubing extends through a well bore to a well producing formation, and after well fluid stops flowing through the tubing under reservoir pressure, the well fluid is hydraulically pumped...
4227582 Well perforating apparatus and method  
A method and apparatus for perforating a well casing and surrounding formation are disclosed. The perforating apparatus includes a laser source for projecting a high intensity laser beam...
4191255 Method and apparatus for cutting and pulling tubular and associated well equipment submerged in a water covered area  
A method and apparatus for cutting and recovering tubular and associated well equipment submerged in a water covered area including the steps of lowering a well string including a cutting tool, a...
4184430 Method and apparatus for severing tubing  
Apparatus for severing tubing along a generally transverse plane through the tubing wall, and including two confined explosive charges aligned axially with the tubing wall and terminating at...
4181196 Method and apparatus for recovery of subsea well equipment  
Method and apparatus are disclosed for recovering submerged equipment, such as a guide base and wellhead used in offshore well operations. A recovery tool, which includes an elongated member...
4158389 Chemical cutting apparatus and method for use in wells  
A chemical cutting apparatus and method for cutting objects in well bores such as, for example, tubing in the bore of an oil or gas well. The apparatus is properly positioned relative to the...
4153118 Method of and apparatus for perforating boreholes  
A perforator apparatus includes an elongate body having a center of gravity and characterized by a longitudinal axis extending through the center of gravity. The body is supported at a point...
4147216 Penetrator/nozzle arrangement  
A penetrator/nozzle arrangement, particularly for enabling fighting of fires in aircraft and other difficult access target units, in which the penetrator/nozzle arrangement has a telescopic nozzle...
4122899 Well perforator with anchor and method  
A cased borehole has a tubing string run downhole thereof. A packer affixed to the tubing is set with the tubing string terminating in proximity of a hydrocarbon producing formation to be...
4105073 Tubing conveyed sand consolidating method  
Method of completing a hydrocarbon containing formation located downhole in a cased borehole by running a jet perforating gun downhole on the end of a tubing string. The tool string includes a...
4078611 High temperature perforating method  
A perforating gun apparatus is suspended downhole in a relatively cool zone of a borehole by connecting the gun to a tubing string. The tubing string includes a wireline operated, releasable...
4074756 Apparatus and method for well repair operations  
Flow channels behind the casing in a well are plugged by detecting a circumferential temperature anomaly on the casing, perforating in the direction of such anomaly, and introducing cement into...
4046197 Well completion and workover method  
A well completion and workover method wherein a subterranean formation is contacted with a high density, nondamaging treating fluid which comprises a saturated, aqueous solution having finely...
4040485 Method of simultaneously setting a packer device and actuating a vent assembly  
A packer actuated vent assembly comprising a packer device settable by reciprocal movement of a mandrel, a valve actuator in the form of a barrel attached to the packer body, and a mandrel...
4040482 Optional fire and release tool and method  
Well bore completion method and apparatus which includes a perforating gun suspended from the end of a tubing string. A releasable coulping device is interposed between a stop means and the gun....
4009757 Sand consolidation method  
A method of completing a sandy production zone located downhole in a borehole by spotting a polymeric agent adjacent to the production zone, perforating the casing adjacent to the zone, and...
3993137 Method and device for extinguishing fires in oil wells  
Method and apparatus for extinguishing fires in oil wells. The method includes the steps of: attaching a shell which is integral with required guides and valves to the outer oil producing pipe or...
3990507 High temperature perforating apparatus  
A high temperature well completion method is carried out by releasably suspending a perforating gun uphole in a relative low temperature region of the borehole. A wireline actuated releasable...