Exxonmobil Upstream Research Company

Exxonmobil Upstream Research

Michael T Matheidas

Richard Alan Huntington

Stanley O Uptigrove

William N Yunker

Niran Singh Khaira

Wayne S Pon

Paul W Sibal

Patrick M Moore

The disclosure includes controlling a pressure ratio for a compressing system, comprising introducing a quantity of liquid into an input stream to create a multiphase input stream, compressing the multiphase input stream with a centrifugal compressor to create a discharge stream, measuring a parameter of the discharge stream, wherein the discharge parameter corresponds to a pressure ratio for the centrifugal compressor, when the parameter exceeds a first predetermined point, increasing a pressure ratio of the centrifugal compressor by increasing the quantity of liquid introduced, and when the parameter exceeds a second predetermined point, decreasing the pressure ratio by decreasing the quantity of liquid introduced.

Controlling a wet gas compression system

A system and method for processing natural gas to produce liquefied natural gas is disclosed. The natural gas is cooled in one or more heat exchangers using a first refrigerant from a first refrigerant circuit in which the first refrigerant is compressed in a first compressor driven by a first gas turbine having a first inlet air stream. The natural gas is liquefied using a second refrigerant, the second refrigerant being compressed in a second compressor driven by a second gas turbine having a second inlet air stream. At least one of the inlet air streams is chilled from about the respective dry bulb temperature to a temperature below the respective wet bulb temperature. Water contained in at least one of the chilled first and second air streams is condensed and separated therefrom. At least a portion of the first refrigerant is condensed or sub-cooled using the separated water.

System and method for liquefying natural gas with turbine inlet cooling

A system and method for determining the presence of water proximate to insulation. A system provided includes an enclosure, and insulation disposed over the enclosure. A moisture reactive compound indicates water proximate to the insulation.

Detecting moisture proximate to insulation

The disclosure includes a centrifugal compressor, comprising an inlet configured to receive a gas stream, an outlet, and a liquid injection port configured to introduce a liquid into the gas stream and create a multiphase fluid, wherein the centrifugal compressor is configured to compress the multiphase fluid. The disclosure further includes a method of operating a centrifugal compressor, comprising passing a gas stream to a centrifugal compressor inlet, introducing a quantity of liquid into the gas stream to create a multiphase stream, and compressing the multiphase stream.

Wet gas compression

Systems and a method for detecting potential areas of corrosion under insulation are provided. An exemplary system includes an enclosure, insulation disposed upon an outer surface of the enclosure, and a number of microelectromechanical system (MEMS) sensors. The MEMS sensors detect water proximate to the insulation.

A method and system for actively controlling an axial separation between a seal face of a stationary ring and a seal face of a rotating ring of a gas seal is disclosed. At least one property is sensed indicative of a condition of at least one of the seal faces. With at least one sensing device, a characteristic of the axial separation between the seal faces is sensed. A net magnetic force of at least one magnetic device is adjusted based on the property and/or the characteristic. Adjusting the net magnetic force adjusts the axial separation between the seal faces. Without using a buffer gas between the seal faces, flow of gas or other fluid is controlled between the seal faces by adjusting the axial separation.

Device and method for controlling rotating equipment seal without buffer support equipment

A method to control an axial separation between a rotating ring and a stationary ring of a dry gas seal. The dry gas seal restricts leakage of a gas or other fluid to or from a rotating device. At least one property of the gas or other fluid is sensed. At least one of the axial separation between the rotating ring and the stationary ring, and a time rate of change of the axial separation, is sensed. A stiffness of a film between the rotating ring and the stationary ring is estimated. A field strength of at least one magnetic device is adjusted based on at least two of the sensed axial separation, the sensed time rate of change of the separation, and the estimated film stiffness. The axial separation between the rotating ring and the stationary ring is adjusted.

Growing community of inventors

The Woodlands, TX, United States of America

Michael T Matheidas