Chevron U.s.a. Inc.

Other

Jacobo Rogelio Archuleta

James Daniel Montoya

Heath Evan Lynch

Manuel Eduardo Gonzalez

Jay Patrick Painter

David William Beck

Cole Thomas Brinkley

Melvin Clark Thompson

Patrick Rodriguez

Monica Suman Krishnan

Roy M Goeller

Scot Ellis

Ronald Derane Goodwin

Wade Ogg

Dale Spall

A testable back pressure valve can include a housing comprising a housing body. The valve can also include a valve seat coupled to the housing, where the valve seat includes a valve seat body having a first cavity and a second cavity, and where the valve seat further includes a first network of channels disposed in the valve seat body. The valve can further include a valve head movably disposed within the first cavity of the valve seat. The valve can also include a piston follower movably disposed within the second cavity of the valve seat, where the valve head is fixedly coupled to the piston follower. The valve can further include a travel piston movably disposed within the second cavity of the valve seat, where the travel piston is moveably coupled to the piston follower.

Testable back pressure valves

A testable back pressure valve can include a body. The valve can also include a first flow regulating device movably disposed within a top end of the body, where the first flow regulating device is configured to move from a first default position to a first position based on first flow characteristics of a first fluid that flows into a top end of the body toward a bottom end of the body. The valve can further include a second flow regulating device movably disposed within the bottom end of the body. The valve can also include a network of channels disposed within the body between the first flow regulating device and the second flow regulating device.

A system for monitoring a floating roof of a liquid storage tank and a method for use of the system are described. The system includes linear position measuring devices to determine the vertical location and orientation of the floating roof within the storage tank and one or more transmitters to relay such information to a monitoring, recording, or control device, or to a remote computer network location. Typically, three measuring devices are used, positioned at or near the top of the storage tank and generally equally spaced around the perimeter of the tank. The system and method are useful to monitor the position and inclination of a liquid storage tank floating roof, such as may be used in the petrochemical, chemical and other industries where such storage tanks are in use.

Monitoring system for floating roof storage tank

This disclosure relates to a wellbore electrical isolation system and method. The system may comprise an electrically conductive tube, an insulating layer covering at least a portion of the tube, an electrically conductive centralizer, electrically insulating confinement devices, and/or other components. In some implementations, the system may be configured to electrically isolate one or more sections of an electrically conductive well tubing string from an electrically conductive wellbore casing. In some implementations, a well may include one or more wellbore electrical isolation systems. Electrical isolation of the tubing string from the casing may facilitate powering one or more electrical loads disposed within the wellbore via a coaxial transmission line formed by the casing and the tubing string.

Wellbore electrical isolation system

A system for applying power into a wellbore. The system can include a casing, a tubing string, a first and second isolator sub, a power source, and an electrical device. The casing has a first cavity running therethrough. The tubing string is disposed within the first cavity without contacting the casing, where the tubing string has a second cavity running therethrough. The first isolator sub is mechanically coupled to the tubing string and positioned between the neutral section and the power-transmitting section of the tubing string. The power source is electrically coupled to the power-transmitting section of the tubing string below the first isolator sub. The second isolator sub is mechanically coupled to the tubing string and positioned between the bottom neutral section and the power-transmitting section of the tubing string. The electrical device is electrically coupled to a bottom end of the power-transmitting section of the tubing string.

Transmitting power within a wellbore

An isolator sub is disclosed. The isolator sub can include a first rod having a first coupling feature disposed at a first end. The isolator sub can also include a second rod having a second coupling feature disposed at a first end, where the first rod is electrically conductive. The isolator sub can further include an isolator made of an electrically non-conductive material and having a first complementary coupling feature and a second complementary coupling feature, where the first coupling feature couples to the first complementary coupling feature, and where the second coupling feature couples to the second complementary coupling feature. The isolator sub can also include an outer housing coupled to the first rod, the second rod, and the isolator, where the outer housing is electrically conductive and has at least one third coupling feature configured to electrically couple to an electrical cable.

Isolator sub

A pressure sensor for sensing pressure of a fluid includes a tubular housing that has a first capacitor plate segment and a second capacitor plate segment. Each of the first capacitor plate segment and the second capacitor plate segment includes a respective substantially planar inner surface. The pressure sensor also includes an anvil positioned within the tubular housing. The anvil and the tubular housing function as opposite terminals of a variable capacitor. A first capacitor plate side of the anvil and the first capacitor plate segment face each other and have a first gap therebetween. A second capacitor plate side of the anvil and the second capacitor plate segment face each other and have a second gap therebetween. Capacitance of the variable capacitor changes in response to a first change in a size of the first gap and a second change in a size of the second gap.

System, method, and device for capacitive pressure sensing

A process for marking an article in a manner which is optically invisible and difficult to detect. The process is carried out by selecting a laser luminophore which fluoresces in a predetermined portion of the spectrum when exposed to an excitation light of predetermined wavelength and applying the laser luminophore to the article in an amount which is optically invisible when the article is exposed to electromagnetic radiation but which is sufficient for machine detection when the article is exposed to an excitation light of predetermined wavelength.

Growing community of inventors

Santa Fe, NM, United States of America

Jacobo Rogelio Archuleta