Patent application number | Description | Published |
20110210609 | SNEAK PATH ELIMINATOR FOR DIODE MULTIPLEXED CONTROL OF DOWNHOLE WELL TOOLS - A system for selectively actuating multiple load devices, such as well tools, which are selectively actuated by applying a predetermined voltage across a predetermined pair of conductors. At least one lockout device is associated with each load device. The lockout device prevents current from flowing through the respective load device until voltage across the pair of the conductors exceeds a predetermined minimum. A method is provided for selecting well tools for actuation by applying a minimum voltage across a set of conductors and a lockout device. Leak paths are prevented from draining off current by the lockout devices. A system is provided for applying current to bidirectional load devices such as downhole pumps and motors. | 09-01-2011 |
20110309678 | SYSTEMS AND METHODS FOR ISOLATING CURRENT FLOW TO WELL LOADS - Systems and methods for controlling power distribution among various electrical loads disposed in a bore are described. Control modules that are associated with loads such that each load is associated with at least one control module. Each control module includes circuitry that can respond to a voltage at a level that is above a threshold by allowing current to flow to its associated load, and that can prevent current from flowing to its associated load when a voltage level at another load, instead of the associated load, is above a threshold. The loads and control modules can be located in various zones in the wellbore. | 12-22-2011 |
20120145383 | PRESSURE MEASUREMENT IN HIGHLY DEVIATED WELLS - A pressure measurement system for use with a subterranean well can include a chamber positioned in the well, the chamber having an upper portion and a lower portion as positioned in the well, and a device which, in response to gravity acting on the device, selects the upper portion of the chamber for communication with a line extending to a remote location. A method of measuring pressure in a well can include introducing a chamber into the well, then selecting a vertically upper portion of the chamber, and establishing communication between the upper portion of the chamber and a line extending to a remote location. | 06-14-2012 |
20130043038 | Debris barrier for hydraulic disconnect tools - A hydraulic connection mechanism for use in a wellbore comprises an upper connection running tool, a lower connection tool configured to engage the upper connection running tool and form a fluid communication pathway through the hydraulic connection mechanism, and a debris barrier disposed in the fluid communication pathway. The debris barrier comprises a body element, and a spring element configured to maintain the body element in a closed position when the upper connection running tool is disengaged from the lower connection tool. | 02-21-2013 |
20130075110 | Debris Barrier for Hydraulic Disconnect Tools - A hydraulic connection mechanism for use in a wellbore comprises an upper connection tool, a lower connection tool configured to engage the upper connection tool and form a fluid communication pathway through the hydraulic connection mechanism, and a debris barrier disposed in the fluid communication pathway. The debris barrier comprises a body element, and a spring element configured to maintain the body element in a closed position when the upper connection tool is disengaged from the lower connection tool. | 03-28-2013 |
20130213666 | OPERATION OF MULTIPLE INTERCONNECTED HYDRAULIC ACTUATORS IN A SUBTERRANEAN WELL - A system for use with a well can include multiple hydraulic actuators in the well, each of the actuators being connected to a common hydraulic line, and multiple pressure control devices, each pressure control device preventing flow from the hydraulic line to a respective one of the actuators unless a pressure differential across the pressure control device exceeds a predetermined level. A method of controlling operation of multiple hydraulic actuators in a well can include applying pressure to at least one of the actuators, thereby increasing pressure in a common hydraulic line connected to each of the actuators, preventing communication of the increased pressure in the common hydraulic line to additional actuators, and permitting flow from the common hydraulic line to each of the actuators, in response to a pressure differential across the pressure control devices exceeding a predetermined level. | 08-22-2013 |
20140054029 | PRESSURE MEASUREMENT IN HIGHLY DEVIATED WELLS - A pressure measurement system for use with a subterranean well can include a chamber positioned in the well, the chamber having an upper portion and a lower portion as positioned in the well, and a device which, in response to gravity acting on the device, selects the upper portion of the chamber for communication with a line extending to a remote location. A method of measuring pressure in a well can include introducing a chamber into the well, then selecting a vertically upper portion of the chamber, and establishing communication between the upper portion of the chamber and a line extending to a remote location. | 02-27-2014 |
20150013989 | INTERVAL CONTROL VALVE WITH VARIED RADIAL SPACINGS - A flow control device for use with a subterranean well, can include inner and outer flow trim sleeves. A radial spacing between the inner and outer flow trim sleeves increases in a direction of flow through the radial spacing. A method of regulating flow between an interior and an exterior of a tubular string in a well can include displacing at least one of inner and outer flow trim sleeves in a direction, a radial spacing between the inner and outer trim sleeves increasing in the direction. Another flow control device can include inner and outer flow trim sleeves, and a flow area through the radial spacing increases in a direction of flow through the radial spacing. | 01-15-2015 |