John T Mayo

US Patent:

7938969, May 10, 2011

Filed:

May 7, 2009

Appl. No.:

12/436949

Inventors:

Vicki Leigh Colvin - Houston TX, US
Cafer Tayyar Yavuz - Goleta CA, US
John Thomas Mayo - Houston TX, US
Weiyong Yu - Rutland MA, US

Assignee:

William Marsh Rice University - Houston TX

International Classification:

B03C 1/01
B03C 1/02
C02F 1/48

US Classification:

210695, 436177, 436526, 435 72, 4351739, 427598, 252 6251 R, 209214

Abstract:

Methods for separating magnetic nanoparticles are provided. In certain embodiments, a method is provided for separating magnetic nanoparticles comprising: providing a sample comprising a plurality of magnetic nanoparticles; passing the sample through a first magnetic field; at least partially isolating nanoparticles of the first nanoparticle size desired; altering the strength of the first magnetic field to produce a second magnetic field; and at least partially isolating nanoparticles of the second nanoparticle size desired.

US Patent:

20210024807, Jan 28, 2021

Filed:

Apr 3, 2019

Appl. No.:

16/982154

Inventors:

- Sugar Land TX, US
Anna DUNAEVA - Houston TX, US
Changsheng XIANG - Houston TX, US
Jazmin GODOY-VARGAS - Missouri City TX, US
Mohan Kanaka Raju PANGA - Sugar Land TX, US
John Thomas MAYO - Stafford TX, US
Dmitriy USOLTSEV - Richmond TX, US
Jacob KARIAMPALLY - Pearland TX, US

International Classification:

C09K 8/516
C09K 8/80
C09K 8/514
C09K 8/508
C09K 8/504
E21B 43/267
E21B 33/138

Abstract:

Methods include pumping a fracturing pad fluid into a subterranean formation under conditions of sufficient rate and pressure to create at least one fracture in the subterranean formation, the fracturing pad fluid including a carrier fluid and a plurality of bridging particles, the bridging particles forming a bridge in a fracture tip of a far field region of the formation. Methods further include pumping a first plurality of fibers into the subterranean formation to form a low permeability plug with the bridging particles, and pumping a proppant fluid comprising a plurality of proppant particles.

US Patent:

20170002623, Jan 5, 2017

Filed:

Jul 2, 2015

Appl. No.:

14/790256

Inventors:

- Sugar Land TX, US
John Mayo - Houston TX, US
Jacob M. Kariampally - Pearland TX, US

International Classification:

E21B 33/138
C09K 8/72
C09K 8/74
E21B 43/26

Abstract:

Methods of treating a subterranean formation penetrated by a well bore, by providing a first acidic treatment fluid comprising fibers to fracture the formation and providing a non-acidic treatment fluid comprising multiple particle size acid precursors having a first average particle size between about 3 mm and 2 cm and a second amount of acid precursors having a second average size between about 1.6 and 20 times smaller than the first average particle size or a second amount of flakes having a second average size up to 10 times smaller than the first average particle size.

US Patent:

20160349163, Dec 1, 2016

Filed:

May 27, 2015

Appl. No.:

14/722907

Inventors:

- Sugar Land TX, US
Giselle Refunjol - Houston TX, US
John Thomas Mayo - Houston TX, US
Rod William Shampine - Houston TX, US
Timothy Michael Lesko - Conway AR, US

International Classification:

G01N 11/14

Abstract:

An apparatus and method are disclosed for measuring a rheology indicator in a rheometer utilizing a rheometer attachment including a shaft having a shaft axis, an outer surface, and a plurality of helical vanes each extending radially from the outer surface.