EP 2524103 A2 20121121 - DRILL BIT BEARING CONTACT PRESSURE REDUCTION
Title (en)
DRILL BIT BEARING CONTACT PRESSURE REDUCTION
Title (de)
BOHRMEISSEL-LAGERKONTAKT-DRUCKREDUZIERUNG
Title (fr)
RÉDUCTION DE PRESSION DE CONTACT ENTRE PALIERS DE TRÉPAN
Publication
Application
Priority
- US 68580710 A 20100112
- US 2011025427 W 20110218
Abstract (en)
[origin: US2011168450A1] A method of reducing contact pressure between bearing surfaces of a drill bit can include constructing a structure which supports one bearing surface in contact with the other bearing surface, and reducing contact pressure between the bearing surfaces by relieving strain energy in the structure. A drill bit can include one bearing surface which contacts another bearing surface. There is a transition between contact and lack of contact between the bearing surfaces. A structure supporting one of the bearing surfaces has a reduced stiffness, whereby a contact pressure between the bearing surfaces is reduced at the transition.
IPC 8 full level
E21B 10/22 (2006.01); F16C 33/76 (2006.01)
CPC (source: EP US)
E21B 10/25 (2013.01 - EP US)
Citation (search report)
See references of WO 2011088477A2
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)
US 2011168450 A1 20110714; AU 2011205611 A1 20120621; AU 2011205611 B2 20141009; CA 2842758 A1 20110721; EP 2524103 A2 20121121; WO 2011088477 A2 20110721; WO 2011088477 A3 20111020
DOCDB simple family (application)
US 68580710 A 20100112; AU 2011205611 A 20110218; CA 2842758 A 20110218; EP 11733546 A 20110218; US 2011025427 W 20110218