Patent ID: 6772839
Filing Date: 2004-08-10
Classification: E21B

Abstract:
An apparatus for for use with an elongate conduit for withdrawing and injecting fluid through the wall of a tubular structure, the apparatus comprising:a housing having a first end defining an inlet connectable to the elongate conduit, the housing being supportable at a selected position in the tubular structure and defining an operating fluid flow path beginning with the inlet; a fluid driven perforating assembly in the housing, the perforating assembly comprising a piercing member supported for movement from a first position within the housing to a second position in which a portion of the piercing member is extendable through the tubular structure forming a perforation therein, wherein the piercing member comprises a fluid flow path; wherein the perforating assembly defines a fluid flow path continuous with the operating fluid flow path through the housing and the fluid flow path in the piercing member so that when the piercing member is in the second position a continuous flow path is formed between the inlet of the housing and the portion of the piercing member that is extendable through the tubular structure; a fluid driven setting/pack-off assembly adapted to releasably secure the housing at the selected position in the tubular structure and to provide a releasable seal between the inside of the tubular structure outside the apparatus and the fluid flow paths in the housing, the piercing member and the perforating assembly of the apparatus; a pressurized fluid reservoir contained in the housing and operatively connected to the seal assembly and the perforating assembly; and an operating valve adapted to control fluid flow between the fluid reservoir and the seal assembly and between the fluid reservoir and the perforating assembly, the operating valve operable independent of fluid flow in the elongate conduit.