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| Number | Title | Issue Date |
| 7341111 | Expandable bridge plug and setting assembly Bridge plug and setting assembly may be used in a well with a tubular therein to control flow through the tubular. A plurality of fluid powered units 16, 24 are suspended in a well from a work string 14 for exerting a driving force. A plug member 50... | 03/11/2008 |
| 6932159 | Run in cover for downhole expandable screen A screen to be expanded when placed downhole is disclosed. The screen is delivered to the location with a cover that blocks access to the screen from well fluids. Circulation or reverse circulation can be undertaken with no appreciable flow through the screen due to... | 08/23/2005 |
| 6719046 | Apparatus for controlling the annulus of an inner string and casing string A apparatus is disclosed for attaching and sealing to the upper end of the casing allowing the inner string to be run through the apparatus. The apparatus provides a latch for anchoring the inner string and a seal for sealing on the inner string. Also disclosed is a... | 04/13/2004 |
| 6378609 | Universal washdown system for gravel packing and fracturing A universal washdown system for circulating fluid through a wellbore to clean debris therefrom and to gravel-pack a production zone is provided. The system includes a production assembly with a multi-position service tool assembly disposed therein. The mu... | 04/30/2002 |
| 5577559 | High-rate multizone gravel pack system A High-Rate Multizone Gravel Pack System is provided that allows significantly higher gravel packing flow rates than were previously available. This system includes a fluid bypass which greatly enhances flow rate and decreases damage to the bypass due to ... | 11/26/1996 |
| 5404956 | Hydraulic setting tool and method of use A hydraulic setting tool for setting a packer with a sliding valve therein in an operating position in a well bore. The setting tool comprises an outer housing portion slidably disposed with respect to an inner mandrel portion. A piston is connected to th... | 04/11/1995 |
| 5129453 | Quick set well packer An improved well packer for removeable installation in a well casing. A mandrel is associated with the packer for latching engagement with the well packer which can be released from the well packer by a simple rotation of the mandrel by no more than one-q... | 07/14/1992 |
| 4749036 | Dual bore well treating tool A dual bore well treating tool having a pressure operated valve therein that is useful in conjunction with a dual bore packer and with a dual bore on and off or connection tool. One of the bores through the on/off tool, the treating tool and the packer is... | 06/07/1988 |
| 4682656 | Completion apparatus and method for gas lift production A tubing retrievable completion assembly includes a surface-controllable, safety control valve interposed between the production tubing string and a production seal unit. A gas-lift safety valve is carried within a side pocket mandrel connected in the upp... | 07/28/1987 |
| 4641707 | Well apparatus Well apparatus is disclosed in which the bore through a lower tubular body adapted to be packed off and anchored within a well bore is opened and closed by a flapper pivotally mounted on the lower body and spring pressed toward closed position, and a flow... | 02/10/1987 |
| 4566535 | Dual packer apparatus and method A dual packer apparatus comprises a tubular outer assembly including upper and lower packers interconnected and spaced apart by tubular spacers. Ports in the outer assembly provide for communication with a well zone between the two packers and a well zone... | 01/28/1986 |
| 4372390 | Well valve Disclosed are apparatus and method of closing a conduit against fluid flow in at least one longitudinal sense, and selectively disengaging and reengaging the closure mechanism without removing the closure mechanism from the conduit. In a particular embodi... | 02/08/1983 |
| 4044832 | Concentric gravel pack with crossover tool and method of gravel packing A packer with a liner assembly depending from it is packed off and anchored in well casing so that a screen portion of the liner assembly straddles casing perforations within a producing formation. An outer tubing string is lowered through the well casing... | 08/30/1977 |
