Patent ID: 11879312
Assignee: WEATHERFORD U.K. LIMITED
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 18:
19. The downhole screen assembly of claim 18,
wherein the associated valve comprises a slideable member or a longitudinally slideable member;
wherein associated valve comprises at least one further port and/or at least one reed valve that is selectively alignable with or out of alignment with the at least one port or perforation or hole of the first pipe;
wherein the associated valve is biased into a closed position;
wherein the associated valve comprises a spherical member, a biased spherical member, or a spherical member movably provided within a space provided by the at least one port or perforation or hole in the first pipe and a recessed portion in a sleeve; or
wherein the associated valve comprises a flap, a thin metallic flap, a steel flap, a reed valve, and/or one or more sliding sleeves.