US 12,031,384 B2
Cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements
Chen Chen, New Haven, CT (US); Huimin Song, Spring, TX (US); Liang Zhao, Spring, TX (US); Youhe Zhang, Spring, TX (US); Michael G. Azar, The Woodlands, TX (US); Xiaoge Gan, Houston, TX (US); Madapusi K. Keshavan, Oceanside, CA (US); Zhijun Lin, The Woodlands, TX (US); Bala Durairajan, Sugar Land, TX (US); and Michael L. Stewart, Spring, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Dec. 23, 2021, as Appl. No. 17/560,409.
Application 17/560,409 is a continuation of application No. 16/410,135, filed on May 13, 2019, granted, now 11,215,012.
Application 16/410,135 is a continuation of application No. 14/613,144, filed on Feb. 3, 2015, granted, now 10,287,825, issued on May 14, 2019.
Claims priority of provisional application 61/951,155, filed on Mar. 11, 2014.
Prior Publication US 2022/0112773 A1, Apr. 14, 2022
Int. Cl. E21B 10/56 (2006.01); E21B 10/567 (2006.01); E21B 10/573 (2006.01)
CPC E21B 10/5673 (2013.01) [E21B 10/5735 (2013.01); E21B 10/56 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A cutting element, comprising:
a substrate comprising an upper surface; and
an ultrahard layer on the upper surface, a top surface of the ultrahard layer comprising:
a peripheral edge of the top surface extending around the cutting element;
a cutting crest extending across a major dimension of the cutting element from a cutting edge at a first portion of the peripheral edge to a modified region, wherein the modified region is located at a central axis of the ultrahard layer, wherein the modified region along the major dimension comprises a concave cross-sectional shape that extends along the length of the major dimension and across the central axis; and
a lateral portion extending across a minor dimension of the cutting element from the peripheral edge to the modified region, wherein the lateral portion along the minor dimension from the peripheral edge to the modified region comprises a linear shape, a convex shape, or the linear shape and the convex shape, and the modified region along the minor dimension comprises a planar shape perpendicular to the central axis.