Abstract: A method for separating solids from a drill cuttings and drilling mud mixture feed in a shale shaker includes providing a shale shaker (1) having a basket (4) including a stack of at least two screen decks (8,8a, 8b), wherein the screening surfaces (9,9a, 9b) of the decks are spaced apart and superposed one above the other. A fluid retaining wall (5) and the feed receiving end (12a, 12b) of the screening surface of the lowest screen deck define a pond region (15). In use of the method a drill cuttings and drilling mud mixture feed (18) forms a pond of solids and liquid in the pond region that immerses a portion of the screening surface at the feed receiving end of each of the two screen decks. Apparatus for use in the method is also described.

Abstract: A method of manufacturing a filtering screen includes: attaching handle members (3) to edges of at least one wire cloth (1); providing a jig comprising tensioning means (23); placing the at least one wire cloth (1) in the jig and engaging the handle members (3) with handle member engagement portions (15) of the tensioning means (23). The tensioning means (23) are operated to drive the handle members (3) outwardly to tension the wire cloth (1) in orthogonal directions. The method also includes pressing the tensioned wire cloth (1) against a screen frame (6); bonding the wire cloth (1) to the screen frame (6); and trimming the wire cloth.

Abstract: A method of manufacturing a filtering screen includes: attaching handle members (3) to edges of at least one wire cloth (1); providing a jig comprising tensioning means (23); placing the at least one wire cloth (1) in the jig and engaging the handle members (3) with handle member engagement portions (15) of the tensioning means (23). The tensioning means (23) are operated to drive the handle members (3) outwardly to tension the wire cloth (1) in orthogonal directions. The method also includes pressing the tensioned wire cloth (1) against a screen frame (6); bonding the wire cloth (1) to the screen frame (6); and trimming the wire cloth.

Abstract: A method of manufacturing a filtering screen includes: attaching handle members (3) to edges of at least one wire cloth (1); providing a jig comprising tensioning means (23); placing the at least one wire cloth (1) in the jig and engaging the handle members (3) with handle member engagement portions (15) of the tensioning means (23). The tensioning means (23) are operated to drive the handle members (3) outwardly to tension the wire cloth (1) in orthogonal directions. The method also includes pressing the tensioned wire cloth (1) against a screen frame (6); bonding the wire cloth (1) to the screen frame (6); and trimming the wire cloth.

Abstract: A method of manufacturing a filtering screen includes: attaching handle members (3) to edges of at least one wire cloth (1); providing a jig comprising tensioning means (23); placing the at least one wire cloth (1) in the jig and engaging the handle members (3) with handle member engagement portions (15) of the tensioning means (23). The tensioning means (23) are operated to drive the handle members (3) outwardly to tension the wire cloth (1) in orthogonal directions. The method also includes pressing the tensioned wire cloth (1) against a screen frame (6); bonding the wire cloth (1) to the screen frame (6); and trimming the wire cloth.

Abstract: A method of manufacturing a filtering screen includes: attaching handle members (3) to edges of at least one wire cloth (1); providing a jig comprising tensioning means (23); placing the at least one wire cloth (1) in the jig and engaging the handle members (3) with handle member engagement portions (15) of the tensioning means (23). The tensioning means (23) are operated to drive the handle members (3) outwardly to tension the wire cloth (1) in orthogonal directions. The method also includes pressing the tensioned wire cloth (1) against a screen frame (6); bonding the wire cloth (1) to the screen frame (6); and trimming the wire cloth.

Abstract: The present invention provides a vibratory screening apparatus (1) for use in removing solids from a liquid feed, and a basket (4) therefore. The apparatus comprises a static outer housing (2), and a floating basket vibratable by a vibrator device (10). The basket mounts a stack (7) of screen assemblies (8) provided with respective flow directing trays (9) for receiving filtrates from the screen assemblies. A flow distributor (15) divides the feed into at least first and a second feed streams and directs them onto respective screen assemblies, and receives from the flow directing trays, filtrates from respective screen assemblies.

Abstract: The present invention relates to a vibratory screening apparatus which comprises a vibratable screen element (2) mounted in a basket (4), which basket (4) is mounted over a reservoir (6) which contains and holds a pool of liquid slurry (8). A first end (10) of the screen element (2) is disposed within the reservoir (6) such that it is submerged in the body of liquid slurry (8). The reservoir has a deep end (12) in which the first end (10) of the screening element (12) is disposed and a second shallow end (14) above which a median portion (16) of the screening apparatus is disposed. The second end (18) of the screen element (2) is disposed above a portion (20) of the reservoir which extends above the surface of the body of liquid slurry held within the reservoir (6).

Abstract: A method of manufacturing a filtering screen includes: attaching handle members (3) to edges of at least one wire cloth (1); providing a jig comprising tensioning means (23); placing the at least one wire cloth (1) in the jig and engaging the handle members (3) with handle member engagement portions (15) of the tensioning means (23). The tensioning means (23) are operated to drive the handle members (3) outwardly to tension the wire cloth (1) in orthogonal directions. The method also includes pressing the tensioned wire cloth (1) against a screen frame (6); bonding the wire cloth (1) to the screen frame (6); and trimming the wire cloth.

Abstract: The present invention provides a screen system (8) suitable for use in a vibratory screen apparatus (1), and comprising: a screen element (11) and a support frame (12) therefor, as well as novel screen elements (11) and mesh panels (19) therefor, and the use thereof. The screen element (11) consists essentially of a mesh panel (19) provided with first and second elongate support members (22, 23) extending along opposite end portions of the mesh panel (19). The support frame (12) has spaced apart first and second elongate frame elements (13, 14) for engagement with the screen element support members (22, 23) and further elongate frame elements (17, 18) extending there between for supporting the mesh panel (19).

Abstract: The present invention provides a vibratory screening apparatus (1) for use in removing solids from a liquid feed, and a basket (4) therefore. The apparatus comprises a static outer housing (2), and a floating basket vibratable by a vibrator device (10). The basket mounts a stack (7) of screen assemblies (8) provided with respective flow directing trays (9) for receiving filtrates from the screen assemblies. A flow distributor (15) divides the feed into at least first and a second feed streams and directs them onto respective screen assemblies, and receives from the flow directing trays, filtrates from respective screen assemblies.

Abstract: The present invention provides a screen system (8) suitable for use in a vibratory screen apparatus (1), and comprising: a screen element (11) and a support frame (12) therefor, as well as novel screen elements (11) and mesh panels (19) therefor, and the use thereof. The screen element (11) consists essentially of a mesh panel (19) provided with first and second elongate support members (22, 23) extending along opposite end portions of the mesh panel (19). The support frame (12) has spaced apart first and second elongate frame elements (13, 14) for engagement with the screen element support members (22, 23) and further elongate frame elements (17, 18) extending there between for supporting the mesh panel (19).