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| Number | Title | Issue Date |
| 7997353 | Through tubing perforating gun An apparatus for perforating wells has perforating charges and a means for retaining the perforating charges in a first array The first array has a first maximum cross sectional area; and means for expanding the perforating charges into a second three dimensional ar... | 08/16/2011 |
| 7284601 | Casing conveyed well perforating apparatus and method Disclosed is a device and method for externally perforating a well-bore casing. The perforating apparatus is attached to the outside of the casing itself and is conveyed along with the casing when it is inserted into the well bore. The perforation is accomplished us... | 10/23/2007 |
| 7284489 | Casing conveyed well perforating apparatus and method Disclosed is a device and method for externally perforating a well-bore casing. The perforating apparatus is attached to the outside of the casing itself and is conveyed along with the casing when it is inserted into the well bore. The perforation is accomplished us... | 10/23/2007 |
| 7278484 | Techniques and systems associated with perforation and the installation of downhole tools A technique to install a tool in a well includes running the tool into the well and fixing the tool to the well with a fixing agent without pumping the fixing agent through a central passageway of the tool. The tool may be a perforating gun that includes a casing bo... | 10/09/2007 |
| 7131494 | Screen and method having a partial screen wrap The present invention provides a screen for a well that utilizes a partial screen wrapping used to advantage with side conduits (e.g., alternate flowpaths), control lines, intelligent completions devices, and the like. It is emphasized that this abstract is provided... | 11/07/2006 |
| 7017669 | Methods and apparatus for expanding tubulars The present invention provides methods and apparatus for expanding a first, smaller diameter tubular into frictional contact with a second, larger diameter tubular or wellbore. In an embodiment, annular formations formed on an inner surface of a split ring engage an... | 03/28/2006 |
| 6994167 | Method and system for cement lining a wellbore The invention describes a method of cement lining a wellbore to enable a fixed sensor internal of the lining to sense characteristics of the external formations surrounding the wellbore using, at the region of the sensor position, a permeability changing device befo... | 02/07/2006 |
| 6978848 | Method and apparatus for penetrating subsurface formations A method and apparatus for driving at least one explosive driven projectile into an open hole or well bore of a subterranean formation for the purpose of stimulating productive formation. The apparatus is capable of pivoting within the open hole or well bore for des... | 12/27/2005 |
| 6805056 | Method and apparatus for removing abandoned tubular members A method and apparatus for removing a tubular member (e.g., leg of an abandoned or obsolete fixed platforms in a marine environment) is provided. The apparatus includes a delivery system having a frame carrying explosive shaped charges. The frame includes charges ha... | 10/19/2004 |
| 6378625 | Perforating gun A perforating gun includes a guide, a first charge unit, a second charge unit and a linkage. The first and second charge units are coupled to the guide. The second charge unit is capable of being in a collapsed position for passing the second charge unit ... | 04/30/2002 |
| 6371219 | Oilwell perforator having metal loaded polymer matrix molded liner and case A shaped charge is provided which includes features enhancing its manufacturability. In a described embodiment, an oilwell perforator is provided which includes a case and a liner, at least one of which is a molding. The molding has a metal loaded polymer... | 04/16/2002 |
| 6148916 | Apparatus for releasing, then firing perforating guns A perforating gun can be conveyed on tubing and fired while disconnected from the tubing. The gun is retained to a running tool at the lower end of the tubing in a locked position. Actuating a plunger by pressure, a weight bar or other techniques, breaks ... | 11/21/2000 |
| 6125946 | Perforating gun A perforating gun includes a guide, a first charge unit, a second charge unit and a linkage. The first and second charge units are coupled to the guide. The second charge unit is capable of being in a collapsed position for passing the second charge unit ... | 10/03/2000 |
| 5662178 | Wave strip perforating system A perforating gun having an elongated mounting strip and a selected wave or non-linear, zig-zag form as seen in a plan view, with an outer surface diameter sized for convenient insertion and removal from a well. The mounting strip has a series of openings... | 09/02/1997 |
| 5224556 | Downhole activated process and apparatus for deep perforation of the formation in a wellbore This invention relates to a method and apparatus for perforating the formation in a wellbore wherein the wellbore is established for the production of hydrocarbons. The formation is perforated by explosive material carried in pistons which are carried wit... | 07/06/1993 |
| 5095801 | Pivot gun having charges which slidingly engage a stationary detonating cord and apparatus for deploying the charges A pivot gun through-tubing perforating apparatus, which is adapted to be lowered through a tubing in a borehole, includes a perforating gun section and a deployment head section. The perforating gun section includes a plurality of charges which rotate or ... | 03/17/1992 |
| 4961365 | Perforating gun with rotating charges including a mechanical link retaining mechanism A perforating gun contains charges which are rotatable between a stored position and a deployed position, the charges being connected to an enclosed carrier tube via a mechanical link retaining apparatus which is capable of bending but is incapable of str... | 10/09/1990 |
| 4844167 | Through-tubing perforating apparatus A through-tubing perforating apparatus for use in improving wellbore production. A plurality of shaped charges are interconnected by rigid links that each have eyelets to receive the suspension wire. These links, in conjunction with a guide which initiall... | 07/04/1989 |
