E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 21/12 (2006.01) E21B 21/08 (2006.01) E21B 21/10 (2006.01) E21B 21/00 (2006.01)
Patent
CA 2508254
The present invention provides an apparatus and a method for removing undesirable material from a well bore in a hydrocarbon formation with minimum damage to the formation. The apparatus comprises a concentric tubing string, said concentric tubing string further comprising an inner tube means having an inner annulus therethrough and an outer tube means forming an outer annulus between said outer tube means and said inner tube means, means for introducing into said well bore a pressurized clean out medium through one of the said inner annulus and outer annulus, and means for removing said material and clean out medium through the other of the said inner annulus and said outer annulus to the surface of said well bore. In a preferred embodiment, the introducing means comprises a discharge compressor or mud pump and the removing means comprises a suctioning compressor.
L'invention concerne un dispositif et un procédé permettant d'évacuer des matières indésirables hors d'un puits formé dans une formation d'hydrocarbure, en ménageant au maximum la formation. Ce dispositif comprend une colonne de tubage concentrique, laquelle se compose d'un tube interne traversé par un espace annulaire interne et d'un tube externe formant un espace annulaire externe entre ledit tube externe et ledit tube interne, des moyens permettant d'introduire dans ledit puits un agent de débourbage sous pression à travers l'espace annulaire interne ou l'espace annulaire externe, et des moyens permettant d'évacuer vers la surface du puits lesdites matières et l'agent de débourbage à travers l'autre de ces espaces annulaires. Dans une forme de réalisation préféré, les moyens d'introduction comprennent un compresseur de refoulement ou une pompe à boue, et les moyens d'extraction comprennent un compresseur d'aspiration.
Bennett Jones Llp
Presssol Ltd.
LandOfFree
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