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.
申请公布号
WO2011088477(A2)
申请公布日期
2011.07.21
申请号
WO2011US25427
申请日期
2011.02.18
申请人
HALLIBURTON ENERGY SERVICES, INC.;SUI, PING, C.;WEAVER, GARY, E.