Liang Zhao

US Patent:

20130168158, Jul 4, 2013

Filed:

Dec 27, 2012

Appl. No.:

13/728655

Inventors:

SMITH INTERNATIONAL, INC. - Houston TX, US
Yahua BAO - Orem UT, US
Youhe ZHANG - Spring TX, US
Liang ZHAO - Houston TX, US
Zhijun LIN - The Woodlands TX, US

Assignee:

SMITH INTERNATIONAL, INC. - HOUSTON TX

International Classification:

E21B 10/46
B23K 31/02

US Classification:

175428, 2281221, 228121

Abstract:

A method for making a diamond compact includes pre-heating a diamond body which includes a carbonate catalyst to convert at least a portion of the carbonate catalyst into an oxide, assembling the diamond body and a substrate, providing a braze material between the diamond body and the substrate to form a diamond compact, heating the braze material to melt the braze material and form a braze joint between the diamond body and the substrate, and cooling the braze material after increasing the pressure. A bit having a diamond compact including a carbonate catalyst and a metal oxide mounted thereon.

US Patent:

20200181985, Jun 11, 2020

Filed:

Feb 17, 2020

Appl. No.:

16/792789

Inventors:

- Houston TX, US
Liang ZHAO - Houston TX, US
Xiaomin CHENG - Houston TX, US
Demin CHEN - Houston TX, US
Xiongwen YANG - Houston TX, US
Yonghong WANG - Houston TX, US
Yu LIU - Houston TX, US

Assignee:

CNPC USA Corporation - Houston TX

International Classification:

E21B 10/567
E21B 10/42

Abstract:

The present invention provides non-planar cutting tooth and a diamond drill bit. The non-planar cutting tooth and the diamond drill bit have great ability of impact resistance and balling resistance. According to the features of drilled formation, cutting teeth are arranged on the drill bit with different mode, which can improve the mechanical speed and footage of the drill bit.

US Patent:

20190264511, Aug 29, 2019

Filed:

May 13, 2019

Appl. No.:

16/410135

Inventors:

- Houston TX, 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, UX
Madapusi K. Keshavan - Oceanside CA, US
Zhijun Lin - The Woodlands TX, US
Bala Durairajan - Sugar Land TX, US
Michael L. Stewart - Spring TX, US

International Classification:

E21B 10/567
E21B 10/573

Abstract:

A cutting element may include a substrate, an upper surface of the substrate including a crest, the crest transitioning into a depressed region, and an ultrahard layer on the upper surface, thereby forming a non-planar interface between the ultrahard layer and the substrate. A top surface of the ultrahard layer includes a cutting crest extending along at least a portion of a diameter of the cutting element, the top surface having a portion extending laterally away from the cutting crest having a lesser height than a peak of the cutting crest.

US Patent:

20150259988, Sep 17, 2015

Filed:

Feb 3, 2015

Appl. No.:

14/613144

Inventors:

- Houston TX, US
Huimin SONG - Spring TX, US
Liang ZHAO - Katy TX, US
Youhe ZHANG - Spring TX, US
Michael G. AZAR - The Woodlands TX, US
Xiaoge GAN - Houston TX, US
Madapusi K. KESHAVAN - The Woodlands TX, US
Zhijun LIN - The Woodlands TX, US
Bala DURAIRAJAN - Sugar Land TX, US
Michael L. STEWART - Spring TX, US

International Classification:

E21B 10/567

Abstract:

A cutting element may include a substrate, an upper surface of the substrate including a crest, the crest transitioning into a depressed region, and an ultrahard layer on the upper surface, thereby forming a non-planar interface between the ultrahard layer and the substrate. A top surface of the ultrahard layer includes a cutting crest extending along at least a portion of a diameter of the cutting element, the top surface having a portion extending laterally away from the cutting crest having a lesser height than a peak of the cutting crest.

US Patent:

20150068817, Mar 12, 2015

Filed:

Sep 9, 2014

Appl. No.:

14/481570

Inventors:

- HOUSTON TX, US
LIANG ZHAO - SPRING TX, US
J. DANIEL BELNAP - LINDON UT, US
ZHIJUN LIN - THE WOODLANDS TX, US

International Classification:

E21B 10/567
B24D 3/10
B24D 18/00
E21B 10/43

US Classification:

175434, 51307, 51309, 51308

Abstract:

A method of making a cutting element includes subjecting a mixture of diamond particles and a carbonate material to high-pressure high-temperature sintering conditions to form a sintered carbonate-polycrystalline diamond body having a diamond matrix of diamond grains bonded together and carbonates residing in the interstitial regions between the diamond grains, the carbonate material having a non-uniform distribution throughout the diamond matrix. The carbonate-polycrystalline diamond body is subjected to a controlled temperature, a controlled pressure condition or a combination thereof, to effect an at least partial decomposition of the carbonate material.