ENHANCED BACKUP RING EDGE FEATURES FOR METAL FACE SEAL IN ROLLER CONE DRILL BITS

Title:

ENHANCED BACKUP RING EDGE FEATURES FOR METAL FACE SEAL IN ROLLER CONE DRILL BITS

Document Type and Number:

WIPO Patent Application WO/2014/124246

Kind Code:

A2

Abstract:

A backup ring for a face seal in a roller cone bit is configured to resist wear from drilling fluids present adjacent exposed faces of the backup ring. Portions are removed from an exposed end face in a variety of shapes while the hardness of the material is increased. The removal of material offsets an increase in force that would be transmitted through the backup ring on face seal assembly due to flexing. A spring can optionally be included in the removed material location. Another way is to increase the edge density of all or part of the exposed edges while leaving the interior portions unaffected by using electron beam radiation to increase the crosslink density or by other techniques that allow a unitary structure with a more durable edge region.

Inventors:

LIN CHIH (US)
KOLTERMANN TERRY J (US)
ZAHRADNIK ANTON F (US)
RICKS GREGORY L (US)

Application Number:

PCT/US2014/015287

Publication Date:

August 14, 2014

Filing Date:

February 07, 2014

Export Citation:

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Assignee:

BAKER HUGHES INC (US)

Foreign References:

US20050274550A1	2005-12-15
US6123337A	2000-09-26
US7413037B2	2008-08-19

Other References: