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| Number | Title | Issue Date |
| 7249631 | Slip on screen with expanded base pipe A method for manufacturing a wellscreen and a wellscreen that have the mechanical properties of a direct-wrap wellscreen and the precise slot tolerance of a slip-on wellscreen are provided. In one embodiment, a method for manufacturing a wellscreen for use in a well... | 07/31/2007 |
| 7108060 | Fracturing different levels within a completion interval of a well Method and apparatus for fracturing different levels of a completion interval in a well. A workstring lowers a fracturing string which, in turn, is comprised of a base pipe which is blank except for perforated sections spaced along its length. Screen may be provided... | 09/19/2006 |
| 6899176 | Sand control screen assembly and treatment method using the same A sand control screen assembly (40) and method for treating formations traversed by a wellbore (34) in a single trip are disclosed. The sand control screen assembly (40) includes a base pipe (56) with a plurality of openings (58) t... | 05/31/2005 |
| 6298914 | Wire-wrapped well screen A well screen for placement within wells used to filter out impurities from the fluid entering the well. In the preferred embodiment, the well screen comprises a spirally-wound wire forming a cylinder with gaps between the layers of wire. The layers of wi... | 10/09/2001 |
| 6089316 | Wire-wrapped well screen A well screen for placement within wells used to filter out impurities from the fluid entering the well. In the preferred embodiment, the well screen comprises a spirally-wound wire forming a cylinder with gaps between the layers of wire. The layers of wi... | 07/18/2000 |
| 5785122 | Wire-wrapped well screen A well screen for placement within wells used to filter out impurities from the fluid entering the well. In the preferred embodiment, the well screen comprises a spirally-wound wire forming a cylinder with gaps between the layers of wire. The layers of wi... | 07/28/1998 |
| 5311942 | Well screen having a protective frame for a horizontal or high-angle well A well screen for a horizontal or high-angle well includes a screen main body and a protective frame. The screen main body has screen rods arranged in the circumferential direction of the well screen and a screen wire wound on the screen rods. The protect... | 05/17/1994 |
| 5095990 | Method and device for sand control A method and device for removing sand from hydrocarbonaceous fluids whereby a berm is formed adjacent to a slot which has penetrated a liner or perforated tube. The berm which is formed along each side of said slot operates to form a lip or platform so as... | 03/17/1992 |
| 4273192 | Method for cleaning a sand screen A method for cleaning a helical spring screen deep in a well while filtering liquid comprises (1) injecting a high pressure hydraulic surge pulse into the spring screen for expanding the coils, (2) forcing high pressure liquid between the coils of the hel... | 06/16/1981 |
| 4180463 | Self-cleaning helical spring filter and methods Methods for cleaning sand from a helical spring sand filter, methods for assembling a self-cleaning helical spring sand filter, and a self-cleaning helical spring sand filter for use at the petroliferous unconsolidated sand strata of an oil well are discl... | 12/25/1979 |
