Mark Ezekiel

20100276620, Nov 4, 2010

Apr 26, 2010

12/767582

Mark Ezekiel - Magnolia TX, US

BP Corporation North America Inc. - Warrenville IL

F16K 25/00
F16K 5/20
F16K 31/44

251172, 251192, 251213

Disclosed are a method and a ball valve structure which provide for an improved seal in a trunnion mounted, double piston ball valve, which is especially useful in applications requiring a seal against high pressures, such as in the oil, gas and chemical process industries. Higher pressures on an inlet side of the valve are used, while the valve moves toward and is maintained in a valve closed position, to create movement of a ball element of the valve so as to bias the ball element against both piston seat elements (or rings) used to create the seals. This movement of the ball element thereby effectively uses such upstream pressure to create and enhance a seal between the ball element and both piston seat elements while in the valve closed position.

20120273209, Nov 1, 2012

Apr 23, 2012

13/453264

Julian Austin - Surrey, GB
Mark Ezekiel - Magnolia TX, US

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

F16K 17/12
E21B 34/04

166321, 137532

A subsea pressure relief valve includes a water-filled nozzle fluidly connected to a hydrocarbon distribution manifold. A valve body is connected to the distribution manifold, with an outlet of the nozzle coincident with an interior water-filled chamber of the valve body. A first seal element is removably seated against the nozzle outlet and an arm is hinged to the body and configured to apply a force along a seal axis and bias the first seal element into sealing engagement with the nozzle outlet until hydrocarbon pressure exceeds a sealing pressure of the applied force and unseats the first seal element from the nozzle outlet such that excess hydrocarbons exit through an outlet of the valve body. A weight is disposed on the arm at a distance from the seal axis.

20120273220, Nov 1, 2012

Apr 23, 2012

13/453322

Mark Ezekiel - Magnolia TX, US
Wyatt Chase Breidenthal - Houston TX, US

BP CORPORATION NORTH AMERICA INC. - Houston TX

F16K 17/04
E21B 34/04

166360, 137542

A pressure relief valve for use submerged in a body of water includes a first seal element in a water-filled chamber having an outlet into the body of water. In addition, the pressure relief valve comprises a spring in a water-filled chamber biasing the first seal element into sealing engagement with a second seal element and forming a seal until the pressure opposing the seal equals or exceeds a predetermined pressure.