Perforated foil screen assembly
AssigneeSchlumberger Technology Corporation
InventorsEric Cady, Richard Bingham
Life of this patent
Estimating the term…
Abstract
A screen assembly includes a frame having an outer perimeter and at least one inner support member, and at least one smooth surface affixed to the frame, where the smooth surface(s) have perforations. The frame may include a plurality of contact points extending upward from a top surface, and at least one smooth perforated screening surface is affixed to the plurality of contact points on the frame. In some cases, the smooth surface comprises a perforated region and an erosion resistant region. Also, the perforations may have a shape that includes one or more corners. The smooth surface may be a perforated metal foil, sheet metal, and the like. Perforations may be apertures having one or more opening area sizes across the span of the screen assembly.
Claims16
A screen assembly comprising:
- a support structure comprising a frame, the support structure configured to couple to a shaker, wherein the frame comprises an outer perimeter and at least one inner support member;
- and
- a continuous filtering surface affixed to the support structure, wherein the continuous filtering surface has a smooth surface, wherein the smooth surface is asymmetrical from a first end to a second end opposite the first end, the smooth surface comprising:
- an erosion resistant region at the first end;
- and
- a perforated region comprising perforations and extending between the erosion resistant region and the second end,
- wherein the continuous filtering surface is a first filtering surface, and the screen assembly further comprises a second filtering surface affixed to the frame between the frame and the first filtering surface, and
- wherein the first filtering surface and the second filtering surface are both affixed to an upper surface of the support structure.
A method comprising:
- introducing a slurry having a fluid and solids onto a shaker, the shaker comprising a screen assembly, the screen assembly comprising:
- a support structure comprising a frame, the support structure configured to and being coupled to the shaker, wherein the frame comprises an outer perimeter and at least one inner support member;
- a continuous filtering surface affixed to the support structure, wherein the continuous filtering surface has a smooth surface, wherein the smooth surface is asymmetrical from a first end to a second end opposite the first end, the smooth surface comprising:
- an erosion resistant region at the first end;
- and
- a perforated region comprising perforations and extending between the erosion resistant region and the second end,
- wherein the continuous filtering surface is a first filtering surface, and the screen assembly further comprises a second filtering surface affixed to the frame between the frame and the first filtering surface, and
- wherein the first filtering surface and the second filtering surface are both affixed to an upper surface of the support structure;
- and
- vibrating the continuous filtering surface to separate the fluid from the solids, such that the fluid on the continuous filtering surface passes through the perforations of the continuous filtering surface and the solids convey along the smooth surface of the continuous filtering surface.
A screen assembly comprising:
- a support structure comprising a frame, the support structure configured to couple to a shaker, wherein the frame comprises an outer perimeter and at least one inner support member;
- and
- a continuous filtering surface affixed to the support structure, wherein the filtering surface has a smooth undulating surface including:
- an erosion resistant region at a first end and configured to receive a slurry discharge thereon;
- a second end opposite the first end;
- and
- a perforated region comprising perforations and extending between the erosion resistant region and the second end,
- wherein the continuous filtering surface is a first filtering surface, and the screen assembly further comprises a second filtering surface affixed to the frame between the frame and the first filtering surface, and
- wherein the first filtering surface and the second filtering surface are both affixed to an upper surface of the support structure.
Dependencies are inferred from the claim text.