Patent application number | Description | Published |
20090283256 | DOWNHOLE TUBULAR LENGTH COMPENSATING SYSTEM AND METHOD - Disclosed herein is a downhole tubular length compensating system. The system includes, a tubular having a plurality of length adjustable sections, and spacings between adjacent length adjustable sections are set to overcome frictional forces anticipated along the tubular. | 11-19-2009 |
20090283262 | DOWNHOLE FLOW CONTROL DEVICE AND METHOD - Disclosed herein is a downhole flow control device. The device includes, a first member defining a first portion of a flow path, and a second member defining a second portion of the flow path, the flow path has a cross sectional flow area defined at least partially by the first member and the second member, a length of the flow path is greater than a largest dimension of the cross sectional flow area, and the cross sectional flow area is adjustable by movement of at least a portion of the first member relative to the second member. | 11-19-2009 |
20090283270 | PLUG PROTECTION SYSTEM AND METHOD - Disclosed herein is a downhole plug protection system. The system includes, a tubular having perforations in a perforated portion, a screen in fluidic communication with the tubular, and a ring in sealable communication with the tubular and attached to the screen the ring having an extended portion positioned radially outwardly of the perforated portion. | 11-19-2009 |
20090283271 | PLUG PROTECTION SYSTEM AND METHOD - Disclosed herein is a downhole plug protection system. The system includes, a tubular having perforations in a perforated portion, a screen in fluidic communication with the tubular, a ring in sealable communication with the tubular and attached to the screen the ring having an extended portion positioned radially outwardly of the perforated portion, and a float shoe in fluidic communication with the perforations positionable downhole of the perforated portion. | 11-19-2009 |
20130098630 | DOWNHOLE FLOW CONTROL DEVICE AND METHOD - A flow control device, including a first member defining a first portion of a flow path and a second member defining a second portion of the flow path. The flow path has a cross sectional flow area defined at least partially by the first member and the second member. A length of the flow path is greater than a largest dimension of the cross sectional flow area, and the cross sectional flow area is adjustable by movement of at least a portion of the first member relative to the second member. A crush zone arranged with at least one of the first member and the second member that can change in length due to loading thereof A method of adjusting restriction of a flow path is also included. | 04-25-2013 |
Patent application number | Description | Published |
20110149444 | SURGE PROTECTION CIRCUIT - A surge protection circuit is disclosed for an electrical Load which may be for instance an LED load which is directly connected to a supply such as mains supply, and comprises a plurality of switches which are distributed across a plurality of semiconductor die. A surge detector detects the start of a spike in the supply, which results from, for example the commencement or interruption of a nearby inductive load, and opens all the switches. By distributing the switches across multiple die the peak voltage across each is reduced relative to using a single die; thereby each die can stay within the absolute maximum voltage capacity. Each die may have its own surge detector; alternatively, a single surge detector may be used which communicates with the switches on each of the die. In an extension the bridge rectifier may be integrated into the circuit distributed across the die. In this embodiment additional inter-die clamping diodes are required to prevent unsafe floating of the edge connections of each die. | 06-23-2011 |
20110241556 | METHOD OF CONTROLLING A FLUORESCENT LAMP, A CONTROLLER AND A FLUORESCENT LAMP - A method of controlling a Fluorescent Lamp (CFL) is disclosed, which enables the lamp to be dimmed during a quick-start mode in which the lamp current may be boosted. The method involves determining a boost value and a dimming value, and controlling the lamp power in dependence on the boost and dimming values. A dimming threshold may be set, below which (i.e. at dimmer output light levels) the boost function is disabled. Hysteresis may be included in the control, in order to avoid hopping between modes. A controller for use with a fluorescent lamp which is adapted to operate according to such a method and a fluorescent lamp using such a controller are also disclosed. | 10-06-2011 |
20110285303 | DIMMER CONTROL CIRCUIT FOR SELECTING BETWEEN STEP DIMMING MODE AND PHASE-CUT DIMMING MODE - The present invention relates to a dimmer control circuit ( | 11-24-2011 |
20120249112 | CONTROLLER FOR SWITCH MODE POWER SUPPLY - A switched mode power supply (SMPS) controller is disclosed. The controller comprises a monitoring circuit adapted to monitor the rate of change of a voltage at an input ( | 10-04-2012 |
20130100711 | Switching Circuit - A switching circuit ( | 04-25-2013 |
20130307505 | SWITCHING CIRCUITS - A switching circuit and a method of operating the same. The switching circuit comprises: a switching transistor adapted to control operation of the switching circuit according to a control signal applied to the control terminal of the switching transistor; a regulating circuit adapted to generate the control signal; and a detecting circuit adapted to sense a voltage at the control terminal when the switching transistor is in an OFF state and to generate a drive signal according to the sensed voltage. The regulating circuit is adapted to generate the control signal based on the generated drive signal. | 11-21-2013 |
20140184145 | CONTROL CIRCUIT FOR A POWER SUPPLY - The invention relates to a control circuit ( | 07-03-2014 |