Patent Number: 6,253,850

Title: Selective zonal isolation within a slotted liner

Abstract: Selective isolation of a zone within a slotted liner completion of a wellbore is accomplished by expanding the original slotted liner to the full inner diameter of the wellbore into the annular area normally found around slotted liners. At least one solid tubular is run into the expanded area of the slotted liner and expanded at least in that section of the wellbore to be isolated. A custom expandable slotted liner can be run and expanded within the existing expanded slotted liner if excessive splits or rips should occur in the existing slotted liner due to expansion. Epoxies, rubber, or other sealing materials can also be utilized to better effect a seal between the liners.

Inventors: Nazzai; Gregory Richard (Kingwood, TX), Frank; Timothy John (Houston, TX), Coon; Robert Joe (Missouri City, TX)

Assignee: Shell Oil Company

International Classification: E21B 43/08 (20060101); E21B 43/10 (20060101); E21B 43/02 (20060101); E21B 029/08 (); E21B 043/10 ()

Expiration Date: 07/03/2018