A centrifuge basket includes a frustum-shaped hollow body defining a pair of opposed ends, being a larger end and a smaller end. The body defines an internal screening surface extending between the ends, the screening surface defining a plurality of apertures arranged to drain liquid from within the body. A plurality of ribs project into an interior of the body from the screening surface, the ribs being arranged in a plurality of annular arrays. The arrays are spaced axially along the screening surface and the ribs of at least one of the arrays are arranged transversely, at a defined included angle, relative to a generatrix line that forms a shape of the screening surface.

A horizontal decanter centrifuge for enhanced recovery of drilling mud from drilling mud solids. Oilfield decanters will always suffer some drilling mud losses because they can only achieve a certain effectiveness with respect to solids dryness. The embodiment describes a process to mitigate the financial burden of drilling mud losses by adding a less expensive sacrificial fluid to take the place of drilling mud in the solids phase. A process and apparatus for drilling mud displacement is described including flowing the drilling mud into a horizontal decanter centrifuge, wherein the stresses imposed within the decanter act to force a sacrificial fluid to displace the drilling mud. The embodiment also describes a process wherein vapours or mist are prevented from escaping and becoming airborne into the external atmosphere.

A solid bowl centrifuge includes a rotatable drum having a cylindrical portion with length L.sub.1 and a conical portion with length L.sub.2, which, when added, give the length L.sub.T of the drum. A screw is arranged in the drum and is rotatable relative to the rotatable drum with a differential speed. At least two drum bearings for supporting the drum in the housing are spaced apart with a spacing L.sub.L. A spacing L.sub.L of the drum bearings for supporting the drum relative to one another is less than the length L.sub.T of the drum.

The present disclosure relates to a centrifugal separator (1), which comprises a rotatable drum (5) having a wall (50), an annular chamber (7), defined along the longitudinal axis (49) of the rotatable drum (5) and bordering the wall (50), an annular screw feeder (90) accommodated rotatably in the annular chamber (7) for moving a mixture of substances in the liquid phase and in the solid phase longitudinally through the annular chamber (7), and separation nets (100) arranged in the wall (50) of the rotatable drum (5). The separation nets (100) have meshes for filtering the solid phase from the liquid phase by rotation of the drum (5). The separation nets (100) are movable relative to the wall (50).

A centrifuge provided with: a bowl having a plurality of extension lugs formed on an opening rim section at one end of the bowl in the axial direction, the extension lugs being spaced apart from one another in the circumferential direction; a screw conveyer rotatably housed inside the bowl and rotatable at a different rotational speed than the bowl; a hub forming solid discharge ports between circumferentially adjacent pairs of the extension lugs, the hub connecting to the extension lugs and covering an opening of the opening rim section from the axial direction; and a wear-resistant sleeve including a sleeve body and a flange. The sleeve body covers lug inner surfaces of the extension lugs and the flange extends in an arced shape along the opening rim section. The sleeve body is attached with axially extending bolts to the opening rim section at a position that avoids the extension lugs.

A centrifugal separator includes a bowl with a conical part with a narrow discharge end comprising a radial surface; an end member opposite the radial surface; a number of distance members extending between the radial surface and the end member and providing outlet openings for a separated solid or heavy phase between adjacent distance members; and wear resistance members covering surfaces at the outlet opening. The wear resistance members include plate members and bushing members. The bushing members include mantle portions surrounding respective distance members. The plate members each cover a portion of the radial surface between adjacent bushing members.

A collection apparatus for a separator. The collection apparatus including a housing at least partially encircling a flow separation passage and defining a chamber and a cutout, the chamber being in fluid communication with the flow separation passage to receive a separated flow therefrom, and the cutout extending outward from the chamber to at least partially deflect the separated flow.

A solid-jacket screw centrifuge is disclosed. The centrifuge has a rotatable drum with a horizontal axis of rotation which encloses a bowl with a rotatable screw, an inlet for introducing material to be centrifuged into the bowl, at least one liquid and at least one solid discharge, where at least the solid discharge is assigned a non-rotatable housing surrounding it, at least radially bounding a discharge chamber, where the discharge chamber is designed as a drying chamber for the solid matter and has axial walls and one or more walls in the radial direction. The housing extends axially parallel to the axis of rotation at most into the conical region of the drum or the screw.

A centrifugal separator for separating solids from a liquid stream has a rotating drum with a perforated outer wall, an auger in the rotating drum, and a driver that rotates the drum and the auger. The drum has an inlet at a first end for receiving the liquid stream, and a solids outlet at a second end. The auger has a helical flight with an outer edge that is immediately adjacent to an inner surface of the outer wall. The driver rotates the rotating drum to apply a centrifugal force to fluids within the rotating drum such that liquid exits via the perforated outer wall, and the auger is rotated at a different speed such that the auger removes solids from an inner surface of the rotating drum and conveys the solids toward the solids outlet.

A solid bowl screw centrifuge has a feed pipe with a diameter initially increasing in the axial direction towards in the direction of flow to form a first feed pipe section in which a centrifugal pre-separation of a part of the solid phase from the suspension occurs. A first portion with a higher solids content compared to the suspension is introduced by a first outlet into the centrifugal chamber in the radial direction. A second feed pipe section adjoins the first feed pipe section axially in the direction of flow, through which the remaining second portion of the suspension that is not discharged through the first outlet and has a lower solids content compared with the suspension is guided further axially through the feed pipe. The remaining second portion of the suspension is introduced into the centrifugal chamber in the radial direction via a second outlet.