Match Document Document Title
5033553 Intra-perforating gun swivel  
A perforating gun, adapted to be disposed in a deviated borehole, includes an intra-gun swivel located between a first plurality of charges and a second plurality of charges of the perforating...
5027899 Method of gravel packing a well  
A well, penetrating a subterranean fluid-producing formation, is effectively gravel packed by a method comprising two sequential steps. In the first step, a slurry of gravel and carrier fluid is...
5025861 Tubing and wireline conveyed perforating method and apparatus  
A new method of standalone perforating comprises the steps of lowering a perforator part-way into a borehole on a tubing string; when perforating is desired, connecting a wireline to the...
5022466 Method for steam flooding profile control  
A method for minimizing well recompletions in a multiple zone hydrocarbonaceous fluid containing formation. A steam flooding enhanced oil recovery (EOR) is conducted in the upper zone of said...
5016713 Method of preheating a heavy oil zone through existing bottom water and then diverting steam into the oil zone  
A method for recovering viscous oil from a formation having a bottom water zone below an oil containing zone. Steam is directed into the bottom water zone thereby heating this zone and an oil...
5010964 Method and apparatus for orienting wellbore perforations  
A wellbore perforating apparatus for forming casing or wellbore wall perforations in inclined wellbores includes a perforating gun, a reference unit for determining the high side of the wellbore...
4979567 Method and apparatus for selective retraction of a tubing carried perforating gun  
An apparatus and method are provided for telescopically retracting a subterranean well tubing carried perforating gun. The retracting apparatus comprises a cylindrical housing which is carryable...
4977961 Method to create parallel vertical fractures in inclined wellbores  
A technique is disclosed for creating parallel vertical fractures from a horizontal or inclined wellbore. Magnitude and orientation of in situ stresses within the formation are determined, and a...
4971153 Method of performing wireline perforating and pressure measurement using a pressure measurement assembly disconnected from a perforator  
A method of perforating includes lowering a perforator and attached pressure measurement gauge assembly into a wellbore on wireline until the gauge assembly touches a bottom of the wellbore....
4969525 Firing head for a perforating gun assembly  
A hydraulically actuated firing head for a tubing conveyed well perforating system includes an actuating piston responsive to a differential between tubing pressure and a sealed low pressure zone...
4962814 Optimization of cyclic steam in a reservoir with inactive bottom water  
A process for preventing steam entry into a bottom water zone of a formation. Performations are made in a well which perforations communicate with the lowest level of said bottom water zone. Air...
4960171 Charge phasing arrangements in a perforating gun  
Various charge phasing arrangements in a perforating gun include those uniquely associated with phasing solely along a 180 degree circumference of the perforating gun, for use in but not limited...
4957165 Well treatment process  
Hydroxyacetic acid condensation product is used as a fluid loss material in a well completion or workover process in which a fluid comprising a hydrolyzable aqueous gel is used. The hydroxyacetic...
4938286 Method for formation stimulation in horizontal wellbores using hydraulic fracturing  
A method for stimulating a formation penetrated by a horizontal wellbore where hydraulic fracturing is utilized. The horizontal wellbore casing is perforated on its top side. Thereafter, the...
4936385 Method of particulate consolidation  
The present invention provides a method of consolidating an incompetent subterrnean formation. An acid curable resin consolidating fluid is positioned within casing in a wellbore in the vicinity...
4930575 Method of protecting a permeable formation  
A method of protecting a permeable formation penetrated by a well bore against damage by subsequent treatment operations. In protecting the formation against damage by cement used in installing a...
4923010 Mud solids immune clean fluid compensating system  
A piston of a well tool is disposed external to a tool housing, and within a space defined by an external sleeve and the housing, and pushes mud solids out of an open end of said space when the...
4917189 Method and apparatus for perforating a well  
A method and apparatus for perforating a subsurface formation in a pumped well. An assembly is provided which facilitates both the support of a pump in a tool string and the convection of fluid,...
4917187 Method and apparatus for hydraulically firing a perforating gun below a set packer  
An improved packer is provided for sealingly engaging a well casing above a pressure responsive device within a petroleum recovery well. A sleeve-like packer body interior of the packer sealing...
4915171 Above packer perforate test and sample tool and method of use  
An above packer perforate, test and sample tool. The tool includes a tester valve which is positioned above a well packer and which has a bypass which provides communication between a well annulus...
4905759 Collapsible gun assembly  
The described invention includes an apparatus for perforating a well through use of one or more perforating guns in a collapsible perforating assembly. The collapsible perforating assembly...
4901802 Method and apparatus for perforating formations in response to tubing pressure  
The present invention presents a method and apparatus for perforating a well in response to fluid pressure in a first tubing string while establishing a pressure balance in response to pressure in...
4898244 Installation of downhole pumps in wells  
A downhole pump and perforating gun are run simultaneously down a well on a tubing string and the gun is fired under underbalanced conditions. A slip joint reduces vertical mechanical shock...
4886126 Method and apparatus for firing a perforating gun  
An electrically operated firing piston is provided for effecting the firing of a perforating gun in a subterranean well. The electrical firing system is disposed within a hollow housing which is...
4883123 Above packer perforate, test and sample tool and method of use  
An above packer perforate, test and sample tool for use in obtaining a sample of fluid from a formation reservoir in a well. The apparatus includes a sampler and an actuator cylinder positioned...
4878538 Perforate, test and sample tool and method of use  
A perforate, test and sample tool for obtaining fluid samples from a formation reservoir in a well. The tool comprises a retrievable packer, perforating guns and a sampler disposed between the...
4867241 Limited entry, multiple fracturing from deviated wellbores  
A hydraulic fracturing process for inducing simultaneously, multiple vertical fractures in a deviated well bore located in a subterranean formation for the removal of resources therefrom,...
4862964 Method and apparatus for perforating well bores using differential pressure  
A method and apparatus for perforating oil well casing in a well bore, with particular advantage in highly deviated well bores. The perforating guns are run into the well bore using the production...
4844170 Well perforating gun and method  
A well perforating gun and method of perforating a subterranean surface within a well bore are provided. The perforating gun comprises a tubular gun body having a plurality of external recesses...
4823875 Well treating method and system for stimulating recovery of fluids  
Subterranean oil and gas producing formations are fractured in a first embodiment by providing one or more combustion gas generating units using rocket fuel type propellants disposed in a well...
4815540 Method and apparatus for releasing a well perforating gun from a supporting tubing string  
A perforating gun is latchably secured to the bottom end of a tubular support which in turn is connected to the bottom of a well tubing string. After the gun has been discharged, it may be...
4809793 Enhanced diameter clean-out tool and method  
A downhole cutting tool, specifically adapted to function as an enhanced diameter clean-out tool, includes longitudinal bores which are opened to fluid flow when cutting members are moved to their...
4804044 Perforating gun firing tool and method of operation  
A tool for activating the firing head of a perforating gun located below a packer by applying pressure to the upper well annulus while maintaining an unimpeded bore between the perforating gun and...
4799829 Method and apparatus for removing submerged platforms  
Disclosed is a method and apparatus for cutting piling and conductors extending into the sea floor from an offshore platform. A window is cut into the piling to permit access to the stabbing point...
4790383 Method and apparatus for multi-zone casing perforation  
A perforating-gun spacer used to position a plurality of guns to perforate a multizone reservoir is formed of a plurality of telescoping sections which are held in an extended position by tapered...
RE32755 Accelerated downhole pressure testing  
The present invention provides a method and apparatus for completing a well by means of a perforating gun attached to the downhole end of a string of production tubing, producing the well until it...
4770246 Method and apparatus for firing borehole perforating apparatus  
Method and apparatus for firing perforating apparatus in a borehole. A pressure actuated firing assembly is run into the borehole on th eend of a cable and latched onto a perforating apparatus....
4765409 Automatic separation device for use with wireline conveyed perforating gun  
Method and apparatus for automatically separating a wireline conveyed through-tubing perforating gun from a cable assembly. The gun is joined to a hollow sleeve on the cable assembly by a sub...
4762179 Pressure assist detonating bar and method for a tubing conveyed perforator  
A detonator bar has an outer housing, an inner housing connected to the outer housing by at least one first frangible member, an explosive charge disposed in the inner housing, and a firing piston...
4760883 Wellbore perforating  
A method and apparatus for perforating at least one mineral-producing zone in a wellbore wherein a packer and perforating gun assembly is employed which will allow the removal of wellbore liquid...
4749039 Gun firing system using fluid filled pressure balance tubing  
Method and apparatus by which a gun firing head is maintained free of debris. An upper tubing string runs downhole in a cased borehole to a packer device. A jet gun, having a firing head located...
4744416 Directional acoustic logger apparatus and method  
An acoustic logging apparatus and method are disclosed for determining the direction of a subsurface noise source, such as a blowout well or fluid channeling behind well casing. The apparatus...
4721355 Optical cable connector assembly including breakable link and process using same  
A cable connector assembly capable of mating to an armored optical cable and providing a hermetically sealed electronics cavity is described. A connector assembly provides a means for placing...
4715443 Baffle system for conducting well treating operations  
A coiled baffle system, primarily for conducting well treating operations, is disclosed. The baffle system preferably comprises a baffle which is inserted into a tubing within a well bore to...
4709760 Cementing tool  
A method and apparatus for cementing an oil or gas well casing including a tubular body section for placing in an oil or gas well casing, the tubular body section being connectable at its upper...
4694878 Disconnect sub for a tubing conveyed perforating gun  
A disconnect sub for a tubing conveyed perforating gun is shown which includes a tubular member and a sliding mandrel telescopingly received within the interior of the tubular member. A...
4690218 Method for depth control and detonation of tubing conveyed gun assembly  
A method of registering perforating guns in a tubing conveyed perforating assembly as set forth. On a tubing string, a TCP assembly is lowered in a cased well. In the tubing string, a logging...
4688640 Abandoning offshore well  
A method and apparatus for abandoning an offshore oil or gas well drilled into the ocean floor having a plurality of concentric strings of pipe having throughbores and spaced to form an annular...
4687061 Stimulation of earth formations surrounding a deviated wellbore by sequential hydraulic fracturing  
A subsurface formation surrounding a deviated borehole and having original in-situ stresses that favor the propagation of a vertical fracture is penetrated by a cased borehole. The casing is...
4658900 High energy firing head for well perforating guns  
A high energy firing mechanism for a well perforating gun comprises a downwardly directed shaped charge which is discharged by an impact detonatable primer. The explosive jet developed by the...