Patent ID: 6012522
Filing Date: 2000-01-11
Classification: B01D,E21B

Abstract:
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 limits wherein the filter layer comprises an expandable slotted tube of which the slots and any gaps between the tube and borehole wall have been filled in situ with granules that are bonded to each other and to the rims of the slots by a bonding agent such that pore openings of a selected size remain between the granules.