US 11,814,904 B2
Cutting structure of cutting elements for downhole cutting tools
Huimin Song, Spring, TX (US); Xiaoge Gan, Houston, TX (US); Zhijun Lin, The Woodlands, TX (US); and Ke Chen, Houston, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Smith International, Inc., Houston, TX (US)
Filed on May 29, 2018, as Appl. No. 15/990,997.
Application 15/990,997 is a continuation in part of application No. PCT/US2016/063708, filed on Nov. 24, 2016.
Application PCT/US2016/063708 is a continuation in part of application No. PCT/US2016/063707, filed on Nov. 24, 2016.
Claims priority of provisional application 62/261,071, filed on Nov. 30, 2015.
Claims priority of provisional application 62/261,042, filed on Nov. 30, 2015.
Prior Publication US 2018/0274303 A1, Sep. 27, 2018
Int. Cl. E21B 10/567 (2006.01); E21B 10/573 (2006.01); E21B 10/55 (2006.01); B22F 5/00 (2006.01)
CPC E21B 10/5673 (2013.01) [E21B 10/55 (2013.01); E21B 10/5735 (2013.01); B22F 2005/001 (2013.01)] 18 Claims
OG exemplary drawing
 
15. A cutting tool, comprising:
a tool body comprising a longitudinal axis;
a plurality of blades extending from the tool body about the longitudinal axis; and
at least one cutting element attached to one of the plurality of blades at a radial location about the longitudinal axis, the at least one cutting element including:
a substrate including a cylindrical side surface and an upper surface, wherein an interface surface is formed on the upper surface;
an ultrahard layer disposed on the interface surface and including a cutting edge;
a non-planar working surface defined by both the upper surface of the substrate and the ultrahard layer,
wherein a peripheral edge of the non-planar working surface between the non-planar working surface and the cylindrical side surface has at least one substrate edge portion and at least one ultrahard layer edge portion, the at least one substrate edge portion extending away from the cutting edge formed of the ultrahard layer.