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:
Mar. 11, 2014
Filed:
May. 28, 2009
Douwe Johannes Runia, Rijswijk, NL;
Douwe Johannes Runia, Rijswijk, NL;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A drill bit comprises a bit body connectable to a drill string at an first end, which bit body is provided with a longitudinal passageway extending from an opening at the first end to a port at a second end. The drill bit further comprises a closure element for closing the passageway, and when the closure element is in a closing position, the closure element is removable. Further, the closure element comprises a first and a second member that are movable relative to each other between an expanded configuration and a collapsed configuration, in which collapsed configuration, the closure element is retractable through the passageway to the first end.