Well screen
AssigneeCompletion Products Pte Ltd
InventorsDieter Kluger, Graeme Dowsett
Life of this patent
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Abstract
A well screen (10) is proposed having an outer standoff layer (14) between the protective screen (15) and the filter medium (13). A method of making the well screen (10) is also proposed, comprising a step of pulling an open-ended cylinder of filter medium (13) over underlying layers (12) in the well screen (10). Furthermore, a method is proposed using series resistance welding for sealing seams in the layers making up the well screen (10).
Claims10
A well screen comprising:
- a filter layer;
- a cylindrical outer stand-off layer around the filter layer;
- and
- a cover around the outer stand-off layer;
- wherein the outer stand-off layer is arranged to space the cover from the filter layer and arranged to resist collapse of the cover towards the filter layer.
A well screen comprising:
- a filter layer;
- a cylindrical skeletal layer around the filter layer;
- and
- a cover around the skeletal layer;
- wherein the skeletal layer is arranged to space the cover from the filter layer.
A method of forming a standoff layer in a well screen comprising the steps of:
- providing a pre-fabricated mesh;
- wrapping the mesh around at least one underlying member of the well screen;
- and
- connecting together the longitudinal edges of the mesh.
A well screen comprising:
- a base pipe;
- an inner stand-off layer;
- a filter layer covering the inner stand-off layer;
- a cylindrical outer standoff layer around the filter layer;
- and
- a cover around the outer stand-off layer, the outer stand-off layer spacing the filter layer from the cover.
A well screen comprising:
- a filter layer;
- a cylindrical outer stand-off layer which provides a cage for and is of greater rigidity than the filter layer;
- and
- a cover around the outer stand-off layer, the outer stand-off layer spacing the filter layer from the cover.
Dependencies are inferred from the claim text.