Andrew F Mitchell

US Patent:

20220389781, Dec 8, 2022

Filed:

Aug 16, 2022

Appl. No.:

17/889232

Inventors:

- Houston TX, US
Daniel J. McLaughlin - Katy TX, US
Ray Guillory - Houston TX, US
Blake T. DeBerry - Houston TX, US
Marcus Smedley - Houston TX, US
Gregory K. Norwood - Boerne TX, US
David A. Scantlebury - Missouri City TX, US
Andrew B. Mitchell - Houston TX, US
Darren W. Mills - Houston TX, US

International Classification:

E21B 33/035
E21B 33/038
E21B 33/043

Abstract:

A subsea wellhead assembly having an arrangement of primary well barriers provided in equipment that is located within the well and/or the wellhead housing is provided. The subsea wellhead assembly may include a tubing hanger positioned in or below a wellhead housing coupled to a subsea well, a tree cap fluidly coupled to the tubing hanger and disposed atop the wellhead housing, and a pair of master production valves configured to be selectively actuated from an open position to a closed position to shut in the subsea well, each of the pair of master production valves located within or below the wellhead housing.

US Patent:

20230026935, Jan 26, 2023

Filed:

Sep 30, 2022

Appl. No.:

17/957921

Inventors:

- Houston TX, US
Andrew B. Mitchell - Houston TX, US

International Classification:

E21B 33/043

Abstract:

A seal assembly is provided. The seal includes an upper body; a lower body having a seal for sealing between a first wellhead system component and a second wellhead system component; and a space-out mechanism disposed between the upper body and the lower body, the space-out mechanism comprising a ramp ring having at least one tapered surface. The upper body has at least one tapered surface configured to interface with the at least one tapered surface of the ramp ring, the ramp ring is configured to rotate relative to the upper body and the lower body, and the at least one tapered surface of the ramp ring and the at least one tapered surface of the upper body are configured to bear against each other to rigidize the system.

US Patent:

20210087899, Mar 25, 2021

Filed:

Dec 4, 2020

Appl. No.:

17/112951

Inventors:

- Houston TX, US
Morris B. Wade - Houston TX, US
Flavio Santos - Houston TX, US
Andrew Mitchell - Houston TX, US
Gregory Norwood - Boerne TX, US
Robert Buxton - Cypress TX, US
David Scantlebury - Houston TX, US
Matthew Crotwell - Houston TX, US
Justin Rye - Houston TX, US
Todd L. Scaggs - Houston TX, US

International Classification:

E21B 33/04
E21B 33/043

Abstract:

Systems and methods for coupling subsea tubular members together are provided. An apparatus may be used to properly orient and/or provide communication between a first subsea tubular member that is being landed on a second subsea tubular member. An apparatus for coupling subsea tubular members may include an alignment sub and a corresponding alignment member. The alignment sub includes: a generally cylindrical body having one or more fluid, electric, or fiber optic lines extending therethrough, one or more couplings coupled to at least one end of the alignment sub, and an orientation profile disposed on a surface of the alignment sub. The alignment member has a profile designed to interface with the orientation profile of the alignment sub. One of the alignment sub and the alignment member remains stationary while the other rotates relative to the stationary structure.