E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/12 (2006.01)
Patent
CA 2111492
A crooked slanted cased wellbore extends downhole to a pay zone which is produced by a rod actuated downhole pump that lifts fluid from the bottom of the wellbore up through a tubing string to a wellhead. The pump is seated in a pump cavity and the tubing string is tensioned at opposed ends while it is rotated. The upper end of the tubing string is attached to a fluid conveying swivel means and a tubing rotator. A tubing anchor having a fluid conveying rotatable mandrel is attached adjacent to and forms part of the lower end of the tubing string by which the lower end of the tubing string is rotatably tensioned and releasably affixed to the casing in proximity to the lower end of the wellbore. A plurality of radially active slips are actuated in response to manipulation of the tubing string to extend the slips into engagement with the casing wall and to retract the slips in order to remove the tubing string from the borehole.
Trou de forage oblique où l'acheminement du fluide de la couche rentable vers la tête de puits est assuré par une pompe fond de trou actionnée par une tige traversant le tubage. La pompe est logée dans une cavité et le tensionnement aux deux extrémités de la tige de forage est assuré pendant la rotation de la tige. L'extrémité supérieure de la tige de forage est reliée à un dispositif pivotant assurant l'extraction du fluide ainsi que par un rotateur de tubage. Un dispositif d'ancrage avec mandrin d'extraction est fixé et forme partie intégrante de l'extrémité inférieure de la tige de forage mise sous tension et en liaison flexible avec le tubage à proximité de l'extrémité inférieure du trou de forage. Une pluralité de coins de retenue à action radiale entrent en jeu en réaction aux manipulations de la tige de forage pour immobiliser ou libérer la tige de forage par rapport aux parois du cuvelage.
Land John Larry
Moffat & Co.
LandOfFree
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