E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/00 (2006.01) E21B 33/13 (2006.01)
Patent
CA 2287625
A method for lining a portion of a casing affixed within a well bore a distance below an upper end of the well bore with a viscoelastic pipe having an upper end, a lower end, and an outer diameter greater than the inner diameter of the casing is provided. The outer diameter of the pipe is reduced so that the outer diameter of the pipe is less than the inner diameter of the casing. The reduced pipe is then lowered into the casing to a predetermined depth where the upper end of the reduced pipe is positioned a distance below the upper end of the well bore. The reduced pipe is then allowed to expand against the internal wall of the casing, thereby forming a fluid tight seal with the casing and effectively sealing any breaches in the casing. So that the outer diameter of the reduced pipe remains less than the inner diameter of the casing as the viscoelastic pipe is being passed down the casing, the reduced pipe is maintained in tension as the reduced pipe is being passed down the casing. Tension is maintained on the reduced pipe by suspending an amount of weight from the lower end of the pipe prior to passing the pipe down the casing. The amount of weight is sufficient to maintain the pipe in tension as it is being passed down the casing so that the outer diameter of the pipe remains less than the inner diameter of the casing as the pipe is being passed down the casing.
Vloedman Jack
Marks & Clerk
Polybore Services Inc.
Victrex Plc
LandOfFree
Method of patching downhole casing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of patching downhole casing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of patching downhole casing will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1813625