E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/117 (2006.01) E21B 37/08 (2006.01) E21B 43/1185 (2006.01) E21B 43/26 (2006.01) E21B 43/263 (2006.01) E21B 43/267 (2006.01)
Patent
CA 2251639
A method and apparatus for perforating and stimulating a subterranean formation which is penetrated by a well bore (10) having casing (12) positioned therein so as to establish fluid communication between the formation and the well bore. A shell, sheath or sleeve (20) of propellant material is positioned so as to substantially encircle at least one shaped charge (40) in a subterranean well bore and is ignited due to the shock, heat and/or pressure generated from the detonated charge. Upon burning, the propellant material generates gases which clean perforations formed in the formation by detonation of the shaped charge(s) and which extend fluid communication between the formation and the well bore.
L'invention concerne un procédé et un appareil destinés à perforer et stimuler des couches souterraines traversées par un puits (10) de forage ayant des tubes (12) qui y sont placés de façon à établir une communication fluide entre lesdites couches souterraines et le puits de forage. Une enveloppe, une gaine ou un manchon (20) d'un matériau propulseur, conçue de façon à entourer sensiblement au moins une charge creuse (40) placée dans le puits de forage, est mis à feu par le choc, la chaleur et/ou la pression générés par la charge que l'on a fait exploser. En brûlant, le matériau propulseur génère des gaz qui nettoient les perforations formées dans les couches souterraines par explosion d'une ou de plusieurs charges creuses et qui étendent la communication fluide entre les couches souterraines et le puits de forage.
Cuthill David A.
Haney Joseph P.
Haney Robert L.
Snider Philip M.
Wesson David S.
Macrae & Co.
Marathon Oil Company
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