Improved method of developing a subsurface freeze zone using...

E - Fixed Constructions – 21 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

E21B 36/00 (2006.01) E21B 43/26 (2006.01) E21B 43/267 (2006.01)

Patent

CA 2663650

A method for lowering the temperature of a portion of a subsurface formation is provided. Preferably, the formation is an oil shale formation. The method includes the step of injecting a cooling fluid under pressure into a wellbore, with the wellbore having been completed at or below a depth of the subsurface formation. The wellbore has an elongated tubular member for receiving the cooling fluid and for conveying it downhole to the subsurface formation. The wellbore also has an expansion valve in fluid communication with the tubular member through which the cooling fluid flows. The method then includes the steps of injecting a cooling fluid under pressure into the wellbore, and expanding the cooling fluid across the first expansion valve. In this way, the temperature of the cooling fluid is reduced. The temperature of the surrounding formation is likewise reduced through thermal conduction and convection.

L'invention concerne un procédé de diminution de la température d'une partie d'une formation souterraine. De préférence, la formation est une formation de schiste bituineux. Le procédé comprend l'étape d'injection d'un fluide réfrigérant sous pression dans un puits, le puits ayant été complété au niveau ou en-dessous d'une profondeur de la formation souterraine. Le puits présente un élément tubbulaire allongé destiné à recevoir le fluide réfrigérant et à l'acheminer vers le fond en direction de la formation souterraine. Le puits présente également un détendeur en communication fluidique avec l'élément tubulaire dans lequel le fluide réfrigérant circule. Le procédé comprend également les étapes d'injection d'un fluide réfrigérant sous pression dans le puits, et de détente du fluide réfrigérant traversant le détendeur. Ainsi, la température du fluide réfrigérant est réduite. La température de la formation environnante est également réduite par conduction et convection thermiques.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Improved method of developing a subsurface freeze zone using... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Improved method of developing a subsurface freeze zone using..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Improved method of developing a subsurface freeze zone using... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1641526

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.