Jonathan J Davis

20120275274, Nov 1, 2012

Apr 20, 2012

13/452263

Matthew Gochnour - Houston TX, US
Graham Openshaw - Portsmouth NH, US
Jonathan Peter Davis - Cypress TX, US

BP CORPORATION NORTH AMERICA INC. - Houston TX

G10K 11/18
H04B 11/00

367134, 367141

Sensor and communications systems for communicating measurements from subsea equipment, such as at an offshore well, to the surface. A sensor for a physical parameter, such as pressure or temperature at a blowout preventer, capping stack, or conduit in communication with the same, is electrically connected to a subsea acoustic transponder. An acoustic monitoring transponder deployed near the well periodically interrogates the acoustic transponder with an acoustic signal, in response to which the acoustic transponder transmits an acoustic signal encoded with the measurement. The measurement data are stored at the acoustic monitoring transponder. An acoustic communications device later interrogates the acoustic monitoring transponder to receive the stored measurement data for communication to a redundant network at the surface.

20120294114, Nov 22, 2012

Apr 20, 2012

13/452185

Matt Gochnour - Houston TX, US
Adam Dudley Lawrence Hudson - Houston TX, US
Roland Peter Sauermann - Houston TX, US
Jonathan Peter Davis - Cypress TX, US
Douglas Graham Wood - Aberdeenshire, GB
Christopher John Curran - Houston TX, US

BP EXPLORATION OPERATING COMPANY LIMITED - Sunbury-On-Thames
BP CORPORATION NORTH AMERICA INC. - Houston TX

G10K 11/00
H04B 17/00
E21B 43/01

367 13, 166336, 367141

Sensor and communications systems are disclosed for communicating measurements from subsea equipment, such as at an offshore well, to the surface. A sensor for a physical parameter, such as pressure or temperature at a blowout preventer, capping stack, or conduit in communication with the same, is electrically connected to a subsea acoustic transponder. An acoustic communications device, for example an acoustic transducer and transceiver electronics deployed on a remotely-operated vehicle, interrogates the acoustic transponder with an acoustic signal, in response to which the acoustic transponder transmits an acoustic signal encoded with the measurement. The acquired measurement data are then communicated to a redundant network at the surface. The sensor and acoustic transponder systems can be installed after an event at the subsea equipment, such as blowout of the well.

45835969, Apr 22, 1986

Sep 13, 1985

6/776066

Jonathan P. Davis - Houston TX

Camco, Incorporated - Houston TX

E21B 3412

166332

A seat coacting with the flapper of a subsurface well safety valve which includes a solid metal annular seat and an annular flexible metal seal in a recess about the solid seat. The flexible seal has a base secured in the recess and a resilient sealing lip which is generally V-shaped in cross section with one end of one of the legs of the V being connected to the base and sealing against the side of the recess and the other leg extending downwardly beyond the solid seat for making contact with the flapper before the flapper seats on the solid seat. The solid seat and the sealing lip are directed downwardly at an angle with the angle of the sealing lip being greater than the angle of the solid seat.