Cementing and rotating an upper well casing attached by...

Details Cementing and rotating an upper well casing attached by... Cementing and rotating an upper well casing attached by...

E - Fixed Constructions

21

B

166/17

E21B 33/14 (2006.01)

Patent

CA 1315673

(WAH-P-1886) ABSTRACT OF THE DISCLOSURE A method for completing a well to provide an uncemented lower casing and an upper cemented casing. The lower casing and upper casing are connected at a swivel joint so that only the upper casing is rotated while cementing. Inflatable packers and a plug are positioned at the lower casing to prevent entry of cement, while a port collar allows cement to flow into the annulus surrounding the upper casing. The invention is particularly useful when setting long lengths of casing and when completing highly deviated or horizontal wellbores. The method also allows an existing conventionally-completed well to be re-drilled and completed as a highly-deviated or horizontal well.

612903

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