Daniel Stephen Mitchell

US Patent:

20190309220, Oct 10, 2019

Filed:

May 28, 2019

Appl. No.:

16/423208

Inventors:

- Houston TX, US
Todd ROPER - Katy TX, US
Steve SAVOY - Macon GA, US
Daniel R. MITCHELL - Austin TX, US
Chris DIBIASE - Fulshear TX, US

International Classification:

C09K 8/80
C23C 18/16
C23C 18/18
C23C 18/40
C23C 18/34

Abstract:

Methods for manufacturing electrically-conductive proppant particles are disclosed. The methods can include preparing a slurry containing water, a binder, and a raw material having an alumina content, atomizing the slurry into droplets, and coating seeds containing alumina with the droplets to form a plurality of green pellets. The green pellets can be contacted with an activation solution containing at least one catalytically active material to provide activated green pellets including the at least one catalytically active material. The method can include sintering the activated green pellets to provide a plurality of proppant particles. The plurality of proppant particles can be contacted with a plating solution containing one or more electrically-conductive material to provide electrically-conductive proppant particles.

US Patent:

20190225877, Jul 25, 2019

Filed:

Jan 18, 2019

Appl. No.:

16/251830

Inventors:

- Houston TX, US
Minjung CHO - Katy TX, US
Daniel R. Mitchell - Austin TX, US
Steve Savoy - Macon GA, US

International Classification:

C09K 8/80
E21B 43/267

Abstract:

Electrically conductive proppant particles having electrically conductive coatings are disclosed. The electrically conductive proppant particles can include a proppant particle having less than about 30% crush at 4,000 psi and a specific gravity of about 4 g/cmor less and a coating of an adhesive material or optionally an initial layer of nickel formed on an outer surface of the proppant particle. An electrically conductive material deposited on an outer surface of the adhesive material or the initial layer of nickel. Methods for making and using such electrically conductive proppant particles having electrically conductive coatings are also disclosed.

US Patent:

20160369163, Dec 22, 2016

Filed:

Sep 2, 2016

Appl. No.:

15/255417

Inventors:

- Houston TX, US
Todd ROPER - Katy TX, US
Steve SAVOY - Austin TX, US
Daniel R. MITCHELL - Austin TX, US

International Classification:

C09K 8/80
C23C 18/36
H01B 1/02
C23C 18/50
E21B 43/267
C23C 18/16
C23C 18/18

Abstract:

Electrically-conductive sintered, substantially round and spherical particles and methods for producing such electrically-conductive sintered, substantially round and spherical particles from an alumina-containing raw material. Methods for using such electrically-conductive sintered, substantially round and spherical particles in hydraulic fracturing operations.

US Patent:

20160237342, Aug 18, 2016

Filed:

Dec 16, 2014

Appl. No.:

14/572486

Inventors:

- Houston TX, US
Todd Roper - Katy TX, US
Steve Savoy - Austin TX, US
Daniel R. Mitchell - Austin TX, US

International Classification:

C09K 8/80

Abstract:

Electrically-conductive sintered, substantially round and spherical particles and methods for producing such electrically-conductive sintered, substantially round and spherical particles from an alumina-containing raw material. Methods for using such electrically-conductive sintered, substantially round and spherical particles in hydraulic fracturing operations.

US Patent:

20160168452, Jun 16, 2016

Filed:

Aug 14, 2015

Appl. No.:

14/826965

Inventors:

- Houston TX, US
Todd Roper - Katy TX, US
Steve Savoy - Austin TX, US
Daniel R. Mitchell - Austin TX, US
Chris DiBiase - Fulshear TX, US

International Classification:

C09K 8/80
C23C 18/34
C23C 18/18
C23C 18/40

Abstract:

Methods for manufacturing electrically-conductive proppant particles are disclosed. The methods can include preparing a slurry containing water, a binder, and a raw material having an alumina content, atomizing the slurry into droplets, and coating seeds containing alumina with the droplets to form a plurality of green pellets. The green pellets can be contacted with an activation solution containing at least one catalytically active material to provide activated green pellets including the at least one catalytically active material. The method can include sintering the activated green pellets to provide a plurality of proppant particles. The plurality of proppant particles can be contacted with a plating solution containing one or more electrically-conductive material to provide electrically-conductive proppant particles.