Deformable well screen
First Claim
1. A deformable well screen for preventing migration of solid particles into a hydrocarbon production well, which screen comprises:
- at least one substantially tubular filter layer having a sieve opening size which is tailored to the size of particles that are to be blocked by the screen,wherein the filter layer is deformable such that it can be expanded, bent, and/or compressed during installation of the screen in a wellbore and that any variation of the sieve opening size of each filter layer as a result of such deformation remains within predetermined limitswherein the filter layer comprises a series of scaled filter sheets which are arranged around an expandable slotted carrier tube and which, when seen in a circumferential direction, are connected at one edge to said tube and at another edge at least partly overlap an adjacent filter sheet.
1 Assignment
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Accused Products
Abstract
A deformable well screen for preventing migration of solid particles into a hydrocarbon production well is disclosed, the screen including at least one substantially tubular filter layer of which the sieve opening size remains fairly constant during or after expansion and/or other formation of the screen. Optionally the screen also includes a series of circumferentially scaled filter segments that are arranged around an expandable slotted tube, an expandable slotted tube of which the slots are filled with resin coated granules, an expandable slotted tube with micro-slots, an assembly of woven metal wire screens that are sintered together and/or a synthetic geotextile fabric.
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Citations
16 Claims
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1. A deformable well screen for preventing migration of solid particles into a hydrocarbon production well, which screen comprises:
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at least one substantially tubular filter layer having a sieve opening size which is tailored to the size of particles that are to be blocked by the screen, wherein the filter layer is deformable such that it can be expanded, bent, and/or compressed during installation of the screen in a wellbore and that any variation of the sieve opening size of each filter layer as a result of such deformation remains within predetermined limits wherein the filter layer comprises a series of scaled filter sheets which are arranged around an expandable slotted carrier tube and which, when seen in a circumferential direction, are connected at one edge to said tube and at another edge at least partly overlap an adjacent filter sheet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of installing a deformable well screen in a hydrocarbon production well, the method comprising the steps of:
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arranging the screen around an expandable slotted tube; lowering the screen and tube assembly into the well; and expanding the tube and thereby increasing the internal diameter of the screen to be increased with at least five per cent while any variation of the sieve opening size of each filter layer of the screen is less than fifty per cent. - View Dependent Claims (16)
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Specification