Global Patent Index - EP 2785949 A4

EP 2785949 A4 20151104 - DRILL BIT WITH SEAL HAVING SPHERES IN A MATRIX SEAL MATERIAL

Title (en)

DRILL BIT WITH SEAL HAVING SPHERES IN A MATRIX SEAL MATERIAL

Title (de)

BOHRMEISSEL MIT DICHTUNG MIT KUGELN IN EINEM MATRIXDICHTUNGSMATERIAL

Title (fr)

TRÉPAN DE FORAGE À JOINT D'ÉTANCHÉITÉ PRÉSENTANT DES SPHÈRES LOGÉES DANS UN MATÉRIAU D'ÉTANCHÉITÉ À MATRICE

Publication

EP 2785949 A4 20151104 (EN)

Application

EP 11876488 A 20111130

Priority

US 2011062654 W 20111130

Abstract (en)

[origin: WO2013081606A1] A drill bit can include a seal which seals against a drill bit surface, the seal including a matrix seal material and a plurality of hollow spheres in the matrix seal material. Another drill bit can include a seal with a matrix seal material, spheres being more dense in a portion of the matrix seal material as compared to in the matrix seal material outside of the portion, and the portion of the matrix seal material being in dynamic sealing contact with a drill bit surface during operation. A drill bit can include a seal between a cone and a journal, the seal comprising a matrix seal material and a plurality of spheres in the matrix seal material, the matrix seal material comprising nitrile.

IPC 8 full level

E21B 10/573 (2006.01); E21B 12/00 (2006.01)

CPC (source: EP)

E21B 10/25 (2013.01); F16J 15/3284 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

WO 2013081606 A1 20130606; AU 2011382519 A1 20140717; CA 2856537 A1 20130606; EP 2785949 A1 20141008; EP 2785949 A4 20151104

DOCDB simple family (application)

US 2011062654 W 20111130; AU 2011382519 A 20111130; CA 2856537 A 20111130; EP 11876488 A 20111130