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
Application
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)
- [Y] US 2010018778 A1 20100128 - NANAYAKKARA SAMAN CHANDANA [US]
- [Y] US 5702111 A 19971230 - SMITH HENRY ROY [GB]
- [A] US 2009038858 A1 20090212 - GRIFFO ANTHONY [US], et al
- [A] US 2008121436 A1 20080529 - SLAY JEREMY BUC [US], et al
- [A] CN 201714301 U 20110119 - TIANJIN LILIN BIT CO LTD
- See references of WO 2013081606A1
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