| US 7,353,877 B2 | ||
| Accessing subterranean resources by formation collapse | ||
| Joseph A. Zupanick, Pineville, W. Va. (US) | ||
| Assigned to CDX Gas, LLC, Dallas, Tex. (US) | ||
| Filed on Dec. 21, 2004, as Appl. No. 11/19,757. | ||
| Prior Publication US 2006/0131024 A1, Jun. 22, 2006 | ||
| Int. Cl. E21B 43/00 (2006.01) | ||
| U.S. Cl. 166—313 [166/50; 175/61] | 23 Claims |
| 17. A method of accessing a subterranean zone from a terranean surface comprising:
forming a well bore extending from the surface into the subterranean zone;
providing a tubing string within the well bore;
passing an underreamer over the tubing string to a specified location within the subterranean zone;
operating the underreamer in forming an enlarged cavity in the well bore;
reducing pressure within the enlarged cavity to facilitate collapse of at least a portion of the subterranean zone about the
tubing; and
providing apertures in the tubing string to allow passage of fluids into an interior of the tubing string.
|