ROTARY DRILL BITS AND DRILLING TOOLS HAVING PROTECTIVE STRUCTURES ON LONGITUDINALLY TRAILING SURFACES
摘要
<p>A rotary drill bit or other drilling tool for drilling or reaming through subterranean formation and comprising a body comprising a distal end and gage areas near a proximal end thereof and comprising longitudinally upward extensions of a plurality of blades or legs. A longitudinally trailing, radially inwardly extending surface is associated with at least some gage pads or legs at the longitudinally trailing ends thereof. Protective structures in the form of superabrasive elements comprising a plurality of thermally stable polycrystalline diamonds, or so-called "TSPs" (thermally stable products) are secured to a trailing surface of at least one gage pad. PDC elements may be employed in combination with the TSPs. Non-diamond structures may also be employed, in lieu of or in conjunction with diamond structures, particularly if drilling of ferrous metal casing components is contemplated.</p>
申请公布号
WO2009146096(A1)
申请公布日期
2009.12.03
申请号
WO2009US39265
申请日期
2009.04.02
申请人
BAKER HUGHES INCORPORATED;PATEL, SURESH, G.;KIRKPATRICK, BEN, L.;MAYER, SCOTT
发明人
PATEL, SURESH, G.;KIRKPATRICK, BEN, L.;MAYER, SCOTT