Weatherford/lamb, Inc.

Aqseptence Group Gmbh

Johnson Filtration Systems

Robert G Norell

Stephen A Uban

Michael Richard Ekholm

Richard Charles Maxson

Garth Hayes Saul

Dean Gerald Brabec

Benjamin A Schmitt

Thomas W Evans

Dusan Visekruna

Eugene Eberhardt

Edmund M Wolfe

Phong Vu

George Gillespie

Lars Brosdahl

Steve Rabb

A support grid assembly for use in a vessel. The support grid assembly includes panels each including a first wall including a media-supporting screen and a second wall to be supported by the vessel wall inner surface. A manifold is coupled to the panels and is in hydraulic communication with vessel outlet. The manifold and the panels permit fluid to flow through the screen in each panel, through the panels, into the manifold, and through the manifold to the outlet of the vessel, as well as in the reverse direction. At least a portion of the first wall may slope downward toward the manifold, and at least a portion of the second wall may form a bottom surface that is curved to substantially conform to a curvature of the vessel wall inner surface. The panels may be arranged in a circular configuration extending radially from the manifold.

Enhanced shape support grid

A media bed support grid for use with a vessel having an inner surface. The media bed support grid comprises a plurality of filter panels, each filter panel having a plurality of parallel and spaced-apart filter wires, the plurality of filter wires forming a filtering surface. The media bed support grid also comprises a plurality of channels underlying and positioned substantially perpendicular to the filter wires. The media bed support grid further comprises a plurality of manifolds, each manifold being coupled to and in fluid communication with the channels.

Media bed support grid

A screen material having a flexible member. The screen material includes closely spaced filter wires supported by a plurality of support members. A stranded cable is used as the support members to provide flexibility to the screen material. The filter wires are welded to the members and define filter gaps between adjacent filter wires to allow liquid and small particles to pass through, while retaining particles too large to fit through the filter gaps.

Screen material

An underdrain assembly for a bed of filter media includes a plurality of elongated screen lateral elements which each have a generally flat bottom surface and a convexly curved upper surface which has flow openings therein. The lateral elements each have a width substantially greater than their height and include a means defining a generally tubular-shaped surface positioned internally thereof. The generally tubular-shaped surface includes flow distribution openings which have a total open area less than the total area of the flow openings in the curved upper surfaces of the lateral elements. In various embodiments, the generally tubular-shaped surfaces are shown as comprising a single tube, a plurality of tubes, and a tube defined by the portions of a plurality of adjacent channel-shaped members whose leg portions support the curved upper surface of the screen lateral elements.

Slotted scallop-shaped underdrain screened lateral elements

An elongated screen assembly, which in various forms, is useful as a scallop in a reactor, or as an underdrain for a gravity filter system, has a cross-section in a direction normal to its axis which is at least twice as wide as it is high. A method is also disclosed for manufacturing the screen assembly by pressing the opposed sides of a wrapped wire cylindrical screen assembly between a pair of plates which have radii of curvature which are different from each other and greater than the radius of curvature of the cylindrical screen assembly.

Slotted screen scallops for high loading pressures and method of making

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New Brighton, MN, United States of America

Robert G Norell