Secondary barrier for use in conjunction with an isolation device in a horizontal wellbore

摘要

A secondary barrier for use in conjunction with an isolation device in a portion of a non-vertical wellbore comprises: a swellable material, wherein the swellable material: (A) has dimensions such that, prior to swelling, the secondary barrier is capable of being placed into the portion of the non-vertical wellbore, and (B) fills a void within the portion of the non-vertical wellbore, wherein the swellable material fills the void after the swelling of at least a portion of the swellable material has occurred, wherein the secondary barrier is positioned adjacent to the isolation device in the portion of the non-vertical wellbore. A method of creating a secondary barrier comprises: introducing the secondary barrier into the portion of the non-vertical wellbore; and contacting or allowing the swellable material to come in contact with the swelling fluid or the increase in temperature.

主权项

1. A secondary barrier for use in conjunction with an isolation device in a portion of a non-vertical wellbore comprising:
a swellable material, wherein the swellable material:
(A) has dimensions such that, prior to swelling, the secondary barrier is capable of being placed into the portion of the non-vertical wellbore, and(B) fills a void within the portion of the non-vertical wellbore to occlude a complete cross-section of the wellbore after the swelling of at least a portion of the swellable material has occurred, wherein the secondary barrier is positioned adjacent to the isolation device in the portion of the non-vertical wellbore, wherein the swellable material is contained within an enclosure, wherein the enclosure is made from an expandable material, and wherein the enclosure comprises a carrier that is introduced into the non-vertical wellbore, the carrier comprising the swellable material.