| US 7,461,699 B2 | ||
| Method for providing a temporary barrier in a flow pathway | ||
| Bennett M. Richard, Kingwood, Tex. (US); Paul McElfresh, Spring, Tex. (US); and Chad Williams, Kingwood, Tex. (US) | ||
| Assigned to Baker Hughes Incorporated, Houston, Tex. (US) | ||
| Filed on Oct. 19, 2004, as Appl. No. 10/968,534. | ||
| Claims priority of provisional application 60/513425, filed on Oct. 22, 2003. | ||
| Prior Publication US 2005/0092363 A1, May 05, 2005 | ||
| Int. Cl. E21B 29/02 (2006.01); E21B 43/00 (2006.01) | ||
| U.S. Cl. 166—376 [166/205; 166/317] | 38 Claims |
| 20. A method for temporarily blocking a mechanism comprising:
forming a degradable barrier over at least part of a mechanism;
placing the blocked mechanism at a remote location;
causing the barrier to degrade into at least one product selected from the group consisting of acids, bases, alcohols, carbon
dioxide and combinations thereof; and
removing a temporary coating by action of the product.
|