Mark J Butler

US Patent:

51678039, Dec 1, 1992

Filed:

Oct 10, 1990

Appl. No.:

7/594937

Inventors:

Kenneth G. Newton - Sugar Land TX
Mark S. Butler - Spring TX
John C. Jacob - New Caney TX

Assignee:

Envirofab, Incorporated - Spring TX

International Classification:

B01D 2964

US Classification:

210141

Abstract:

A mechanically cleaned bar screen or bar rack is disclosed for removing debris from water and wastewater treatment facilities which comprises a frame with housings supported thereon and a bar rack and dead plate. The apparatus is supported on the ledge of the sluice of a water or wastewater treatment facility tilted backward at an angle of about 0. degree. -30. degree. with the bar rack submerged in the flowing stream of water. A carriage carries a pivotally mounted rake assembly with a rake engaging the bar rack. The carriage is reciprocated along a guide rail by motor operated lead screws which extend through rollnut assemblies supporting the carriage. At the top of the traverse of the carriage, the rake is swept by a wiper to remove debris to discharge down a chute for pick up. The motorized drive system is totally enclosed. The motor and gear boxes are stationary and do not travel with the rake carriage.

US Patent:

20210063600, Mar 4, 2021

Filed:

Feb 26, 2018

Appl. No.:

16/320155

Inventors:

- Houston TX, US
Songhua Chen - Katy TX, US
Mark Cheiron Butler - Kingwood TX, US

International Classification:

G01V 3/32
G01V 3/38
G01N 24/08
G01R 33/44
G01R 33/561
G01R 33/56

Abstract:

An electromagnet model or models are created to generate the static and radio frequency magnetic fields of an NMR down-hole logging tool. The magnetic field distributions are then used in spin dynamics (SD) simulations to model the impacts of various effects on NMR logging data, effects that cannot be accurately describe by theoretical formulation alone. The accuracy of the electromagnetic model and the SD simulation may be verified against experimental observations or trial logging runs. Simulation of electronic circuit, molecular diffusion, tool motion can all be incorporated in the SD simulation. The NMR data inversion process can be modified according to echoes obtained from SD simulation to obtain more accurate petrophysical parameters.

US Patent:

20200333502, Oct 22, 2020

Filed:

Apr 18, 2019

Appl. No.:

16/388372

Inventors:

- Houston TX, US
Songhua Chen - Katy TX, US
Mark Cheiron Butler - Kingwood TX, US

International Classification:

G01V 3/32
G01V 3/38
G01V 99/00

Abstract:

Methods, devices, and systems for tracking lateral motion of a nuclear magnetic resonance (NMR) tool are disclosed. In some embodiments, a phase shift for one or more spin-echo signals received by the NMR tool is detected during a velocity measurement sequence that corresponds to at least one formation measurement sequence. A lateral velocity of the NMR tool is determined based, at least in part, on the detected phase shift.