Patent ID: 6263970
Filing Date: 2001-07-24
Classification: E21B

Abstract:
A device designed to equip a fluid production wellhead, upstream from a plurality of valves of a production shaft, through which valves, a fluid carrying solid particles passes, in order to isolate the solid particles, said device comprising:a closed casing (4) capable of being made integral with an element (16) of the wellhead;a sleeve (3) capable of being attached in a watertight fashion, to an internal wall of a body (1) that produces the fluid upstream from at least one lateral exit (2) equipped with the valves, where said sleeve (3) is separated from the internal wall of the body (1) by a first annular space (8) and projects inside said casing (4) so as to lead the fluid produced by the wellhead therein;a cylindrical partition (9) arranged inside said casing (4) around said sleeve (3), from which it is separated by a second annular space (10), where said partition (9) rests in a watertight fashion against an upper part of said sleeve (3) and against a base of said casing and is arranged in such a way in relation to said casing that the first and second annular spaces (8, 10) are in communication;at least one first opening (11) arranged in an upper part of said partition (9) above said sleeve (3), in order to allow for the passing of the fluid brought through it into a volume that separates said partition (9) from an external part (5) of said casing;at least one second opening (12) is arranged in a lower part of said partition (9), and said second opening (12) is separated from said first opening (11) arranged in the upper part of said partition and allow for the passing of the fluid from the volume that separates said partition (9) from the external part (5) of said casing (4) toward the second annular space (10);and a filter (13) arranged inside said casing (4) on the periphery of the lower part of said partition (9) facing said second opening (12), said filter (13) being arranged in such a way that any fluid that penetrates through said first opening (11) of said partition into the volume that separates said partition from the external part (5) of said casing passes through said filter (13) before penetrating into the second annular space (10) through said second opening (12) of said partition, the debris and solid matter carried by the fluid produced thus being isolated by said filter (13) and being deposited through gravity at the base of the volume that separates said filter (13) from the external part (5) of said casing.