David Wayne Todd

US Patent:

7632086, Dec 15, 2009

Filed:

Nov 25, 2003

Appl. No.:

10/723389

Inventors:

Thomas Redden Veariel - Houston TX, US
Costas George Gogos - Wyckoff NJ, US
David Burton Todd - West Windsor NJ, US
Bainian Qian - Newark NJ, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

B29C 47/00

US Classification:

4253781, 425382 R

Abstract:

Melt fracture is reduced, without the necessity of polymer processing-aid additives specifically designed to alleviate exit region surface melt fracture phenomenon, by heating at least a portion of the die through which the polymer is extruded. The die exit region is maintained at a temperature above the bulk melt temperature of the polymer extruded through the die exit hole.

US Patent:

20220356772, Nov 10, 2022

Filed:

Jul 20, 2022

Appl. No.:

17/869239

Inventors:

- Houston TX, US
David Kubricht - Cypress TX, US
Richard Cheatham - Houston TX, US
Jeffrey Pollack - Joliet IL, US
Chad Lawman - Joliet IL, US
David Todd - Houston TX, US
Tyler Nolen - Houston TX, US
John J. Crosetto - Oak Forest IL, US

International Classification:

E21B 21/08
H02J 13/00
E21B 43/26
E21B 4/04
E21B 7/02
F04B 17/03
F04B 17/06
F04D 13/06
H02B 1/52
H02B 5/00
H02K 7/18
H02P 27/04

Abstract:

Certain embodiments of the present application relate to a variable frequency drive (VFD) cabin for a pump configuration including a mobile trailer on which the VFD cabin is to be mounted. The VFD cabin generally includes a medium-voltage VFD and a ventilation system. In certain embodiments, the ventilation system is configured to generate an overpressure condition within the cabin to discourage the entry of dust and debris into the cabin. In certain embodiments, one or more components of the medium-voltage VFD are coupled to the floor of the cabin via a vibration damping system. In certain embodiments, the VFD cabin may be directly coupled to a chassis of the mobile trailer without an intervening suspension being provided between the VFD cabin and the chassis.

US Patent:

20220259931, Aug 18, 2022

Filed:

May 3, 2022

Appl. No.:

17/735759

Inventors:

- Houston TX, US
John J. Crosetto - Oak Forest IL, US
David Kubricht - Cypress TX, US
Richard Cheatham - Houston TX, US
Jeffrey Pollack - Joliet IL, US
Chad Lawman - Joliet IL, US
David Todd - Houston TX, US
Tyler Nolen - Houston TX, US

International Classification:

E21B 21/08
H02J 13/00
E21B 43/26
E21B 4/04
E21B 7/02
F04B 17/03
F04B 17/06
F04D 13/06
H02B 1/52
H02B 5/00
H02K 7/18
H02P 27/04

Abstract:

An electric driven hydraulic fracking system is disclosed. A pump configuration that includes the single VFD, the single shaft electric motor, and the single hydraulic pump that is mounted on the single pump trailer. A pump configuration includes a single VFD configuration, the single shaft electric motor, and the single shaft hydraulic pump mounted on the single pump trailer. The single VFD configuration converts the electric power at the power generation voltage level distributed from the power distribution trailer to a VFD voltage level and drives the single shaft electric motor to control the operation of the single shaft electric motor and the single hydraulic pump. The VFD voltage level is a voltage level that is required to drive the single shaft electric motor. The VFD configuration also controls operation of the auxiliary systems based on the electric power at the auxiliary voltage level.

US Patent:

20220220816, Jul 14, 2022

Filed:

Mar 29, 2022

Appl. No.:

17/707840

Inventors:

- Houston TX, US
John J. Crosetto - Oak Forest IL, US
David Kubricht - Cypress TX, US
Richard Cheatham - Houston TX, US
Jeffrey Pollack - Joliet IL, US
Chad Lawman - Joliet IL, US
David Todd - Houston TX, US
Tyler Nolen - Houston TX, US

International Classification:

E21B 21/08
E21B 4/04
E21B 43/26
F04B 17/03
F04B 17/06
H02K 7/18
H02P 27/04
H02J 13/00
H02B 1/52
H02B 5/00
E21B 7/02
F04D 13/06

Abstract:

An electric driven hydraulic fracking system is disclosed. A pump configuration includes the single VFD, the single shaft electric motor, and the single hydraulic pump mounted on the single pump trailer. A controller associated with the single VFD and is mounted on the single pump trailer. The controller monitors operation parameters associated with an operation of the electric driven hydraulic fracking system as each component of the electric driven hydraulic fracking system operates to determine whether the operation parameters deviate beyond a corresponding operation parameter threshold. Each of the operation parameters provides an indicator as to an operation status of a corresponding component of the electric driven hydraulic fracking system. The controller initiates corrected actions when each operation parameter deviates beyond the corresponding operation threshold. Initiating the corrected actions when each operation parameter deviates beyond the corresponding operation threshold maintains the operation of the electric driven hydraulic fracking system.

US Patent:

20230061848, Mar 2, 2023

Filed:

Nov 8, 2022

Appl. No.:

17/982701

Inventors:

- Houston TX, US
John J. Crosetto - Oak Forest IL, US
David Kubricht - Cypress TX, US
Richard Cheatham - Houston TX, US
Jeffrey Pollack - Joliet IL, US
Chad Lawman - Joliet IL, US
David Todd - Houston TX, US
Tyler Nolen - Houston TX, US

International Classification:

E21B 21/08
H02J 13/00
E21B 43/26
E21B 4/04
E21B 7/02
F04B 17/03
F04B 17/06
F04D 13/06
H02B 1/52
H02B 5/00
H02K 7/18
H02P 27/04

Abstract:

An electric driven hydraulic fracking system is disclosed. A pump configuration that includes the single VFD, the single shaft electric motor, and the single hydraulic pump that is mounted on the single pump trailer. A pump configuration includes a single VFD configuration, the single shaft electric motor, and the single shaft hydraulic pump mounted on the single pump trailer. The single VFD configuration converts the electric power at the power generation voltage level distributed from the power distribution trailer to a VFD voltage level and drives the single shaft electric motor to control the operation of the single shaft electric motor and the single hydraulic pump. The VFD voltage level is a voltage level that is required to drive the single shaft electric motor. The VFD configuration also controls operation of the auxiliary systems based on the electric power at the auxiliary voltage level.

US Patent:

20230033433, Feb 2, 2023

Filed:

Oct 18, 2022

Appl. No.:

17/968055

Inventors:

- Houston TX, US
John J. Crosetto - Oak Forest IL, US
David Kubricht - Cypress TX, US
Richard Cheatham - Houston TX, US
Jeffrey Pollack - Joliet IL, US
Chad Lawman - Joliet IL, US
David Todd - Houston TX, US
Tyler Nolen - Houston TX, US

International Classification:

E21B 21/08
E21B 7/02
H02B 1/52
E21B 43/26
H02K 7/18
E21B 4/04
F04B 17/03
F04D 13/06
H02B 5/00
H02P 27/04
F04B 17/06
H02J 13/00
E21B 4/02

Abstract:

An electric driven hydraulic fracking system is disclosed. A pump configuration includes the single VFD, the single shaft electric motor, and the single hydraulic pump mounted on the single pump trailer. A controller associated with the single VFD and is mounted on the single pump trailer. The controller monitors operation parameters associated with an operation of the electric driven hydraulic fracking system as each component of the electric driven hydraulic fracking system operates to determine whether the operation parameters deviate beyond a corresponding operation parameter threshold. Each of the operation parameters provides an indicator as to an operation status of a corresponding component of the electric driven hydraulic fracking system. The controller initiates corrected actions when each operation parameter deviates beyond the corresponding operation threshold. Initiating the corrected actions when each operation parameter deviates beyond the corresponding operation threshold maintains the operation of the electric driven hydraulic fracking system.

US Patent:

20230033487, Feb 2, 2023

Filed:

Oct 11, 2022

Appl. No.:

17/963728

Inventors:

- Houston TX, US
John J. Crosetto - Oak Forest IL, US
David Kubricht - Cypress TX, US
Richard Cheatham - Houston TX, US
Jeffrey Pollack - Joliet IL, US
Chad Lawman - Joliet IL, US
David Todd - Houston TX, US
Tyler Nolen - Houston TX, US

International Classification:

E21B 43/26
H02J 13/00
E21B 4/04
E21B 7/02
E21B 21/08
F04B 17/03
F04B 17/06
F04D 13/06
H02B 1/52
H02B 5/00
H02K 7/18
H02P 27/04

Abstract:

An electric driven hydraulic fracking system is disclosed. A pump configuration that includes the single VFD, the single shaft electric motor, and the single hydraulic pump that is mounted on the single pump trailer. A power distribution trailer distributes the electric power generated by the power generation system at the power generation voltage level to the single VFD and converts the electric power at a power generation voltage level to a VFD voltage level and controls the operation of the single shaft electric motor and the single hydraulic pump. The power distribution trailer converts the electric power generated by the power generation system at the power generation level to an auxiliary voltage level that is less than the power generation voltage level. The power distribution trailer distributes the electric power at the auxiliary voltage level to the single VFD that controls an operation of the of the auxiliary systems.

US Patent:

20210376608, Dec 2, 2021

Filed:

Aug 3, 2021

Appl. No.:

17/393174

Inventors:

- Houston TX, US
Carlos Alfredo Vallejo - Humble TX, US
David Norman Todd - Houston TX, US
Mohamad Alshutlawy - Houston TX, US
John Harold Fischer - Hempstead TX, US

International Classification:

H02J 3/14
H02J 3/02
H02J 3/00

Abstract:

A grid power configuration may provide a reliable, efficient, inexpensive and environmentally conscious power source to a site, for example, a remote site such as a well services environment. Grid power may be provided for one or more operations at the site by coupling a main breaker to a switchgear unit coupled to one or more loads. The switchgear unit may be coupled to the main breaker via a main power distribution unit and may also be coupled to one or more loads. At least one of a grid power unit and a switchgear unit may be coupled to the main breaker via the main power distribution unit and may also be coupled to one or more additional loads. A control center may be communicatively coupled to the main breaker or any one or more other components to control one or more operations of the grid power configuration.