The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 2007
Filed:
Sep. 05, 2003
Richard T. Hay, St. Albert, CA;
Gerald Edward Kent, Spruce Grove, CA;
Jerry Lavelle Keen, Jr., Spring, TX (US);
Charles M. Reid, Edmonton, CA;
Richard T. Hay, St. Albert, CA;
Gerald Edward Kent, Spruce Grove, CA;
Jerry Lavelle Keen, Jr., Spring, TX (US);
Charles M. Reid, Edmonton, CA;
Halliburton Energy Services, Inc., Houston, TX (US);
Abstract
A drilling assembly () comprises upper () and lower () drill strings with a fluid passage () therethrough for distributing fluid to a bottom hole assembly (). The upper drill string () has an upper end () connectable to a drilling apparatus () and fluid source () and a lower end () with an attached casing expander unit () that communicates the fluid passage () of the upper () and lower () drill strings. An upper end () of the lower drill string () is formed from a casing string () telescoped over the casing expander unit. A constriction () connects the casing string () with the rest of the lower drill string (). A flow restriction device () in the lower drill string acts to control fluid flow through the fluid passage. In use, the flow restriction device creates a pressure in the fluid passage that acts at the constriction to advance the lower drill string past the upper drill string while simultaneously expanding the portion of the casing string moving past the expander unit.