Patent application number | Description | Published |
20080210471 | Rotating control device docking station - A system and method is provided for converting a drilling rig between conventional hydrostatic pressure drilling and managed pressure drilling or underbalanced drilling using a docking station housing mounted on a marine riser or bell nipple. This docking station housing may be positioned above the surface of the water. When a removable rotating control device is remotely hydraulically latched with the docking station housing, the system and method allows for interactive lubrication and cooling of the rotating control device, as needed, along with a supply of fluid for use with active seals. | 09-04-2008 |
20100175882 | Subsea Internal Riser Rotating Control Device System and Method - An RCD is used to provide a system and method for sealing a marine riser having a rotatable tubular. A bypass internal channel or external line may be used to allow fluid to bypass the RCD seal. An RCD seal assembly seal could be a mechanically extrudable seal or a hydraulically expanded seal to seal the RCD with the riser. | 07-15-2010 |
20110036638 | Interlocking Low Profile Rotating Control Device - A system and method is provided for a low profile rotating control device (LP-RCD) and its housing mounted on or integral with an annular blowout preventer seal, casing, or other housing. The LP-RCD and LP-RCD housing can fit within a limited space available on drilling rigs. An embodiment allows a LP-RCD to be removably disposed with a LP-RCD housing by rotating a bearing assembly rotating plate. A sealing element may be removably disposed with the LP-RCD bearing assembly by rotating a seal retainer ring. Alternatively, a sealing element may be removably disposed with the LP-RCD bearing assembly with a seal support member threadedly attached with the LP-RCD bearing assembly. The seal support member may be locked in position with a seal locking ring removably attached with threads with the LP-RCD bearing assembly over the seal support member. Spaced apart accumulators may be disposed radially outward of the bearings in the bearing assembly to provide self lubrication to the bearings. | 02-17-2011 |
20110168392 | Remote Operation of an Oilfield Device - A rotating control device is remotely hydraulically latched and unlatched with a docking station housing for use and removal, respectively. The system and method allows for interactive lubrication and cooling of the rotating control device, as needed, along with a supply of fluid for use with an active seal. A first sensor and a second sensor can be used to detect temperature, pressure and density of the supplied fluid at different locations and this data can be compared using a central processing unit (CPU). Also, a sensor can be used to detect the revolutions per minute of a rotating seal of the rotating control device and fluid can be provided to the rotating control device responsive to the detected revolutions per minute. | 07-14-2011 |
20120013133 | Positive Retraction Latch Locking Dog for a Rotating Control Device - A latch and method for use is provided for latching an item of oilfield equipment. The latch has a housing containing a latch member, and the latch member is movable between a radially engaged position in which it is engaged with the item of oilfield equipment, and a radially retracted position in which it is disengaged from the item of oilfield equipment. An actuator is configured to drive the latch member into the radially engaged position. Further, the actuator is configured to drive the latch member toward the radially retracted position. | 01-19-2012 |
20120318496 | Subsea Internal Riser Rotating Control Head Seal Assembly - An RCD is used to provide a system and method for sealing a marine riser having a rotatable tubular. A bypass internal channel or external line may be used to allow fluid to bypass the RCD seal. An RCD holding member seal could be a mechanically extrudable seal or a hydraulically expanded seal to seal the RCD with the riser. | 12-20-2012 |
20130192847 | SEAL ASSEMBLIES IN SUBSEA ROTATING CONTROL DEVICES - Rotating control device related oilfield pressure control is accomplished by upper and lower seal members configured to seal around a tubular, a chamber defined between the upper and lower seal members; and wherein fluid enters and/or exits the chamber via some device or structure. Such a device or structure could be a relief valve, a first accumulator, a pressure control valve, an orifice, and/or a void space in a seal member in a location which contacts the tubular. | 08-01-2013 |
Patent application number | Description | Published |
20130206386 | System for Drilling a Borehole - A rotating control device is remotely hydraulically latched and unlatched with a docking station housing for use and removal, respectively. The system and method allows for interactive lubrication and cooling of the rotating control device, as needed, along with a supply of fluid for use with an active seal. A first sensor and a second sensor can be used to detect temperature, pressure and density of the supplied fluid at different locations and this data can be compared using a central processing unit (CPU). Also, a sensor can be used to detect the revolutions per minute of a rotating seal of the rotating control device and fluid can be provided to the rotating control device responsive to the detected revolutions per minute. | 08-15-2013 |
20140166273 | Rotating Control Device Docking Station - A system and method is provided for converting a drilling rig between conventional hydrostatic pressure drilling and managed pressure drilling or underbalanced drilling using a docking station housing mounted on a marine riser or bell nipple. This docking station housing may be positioned above the surface of the water. When a removable rotating control device is remotely hydraulically latched with the docking station housing, the system and method allows for interactive lubrication and cooling of the rotating control device, as needed, along with a supply of fluid for use with active seals. | 06-19-2014 |
20150027688 | INTERLOCKING LOW PROFILE ROTATING CONTROL DEVICE - A system and method is provided for a low profile rotating control device (LP-RCD) and its housing mounted on or integral with an annular blowout preventer seal, casing, or other housing. The LP-RCD and LP-RCD housing can fit within a limited space available on drilling rigs. An embodiment allows a LP-RCD to be removably disposed with a LP-RCD housing by rotating a bearing assembly rotating plate. A sealing element may be removably disposed with the LP-RCD bearing assembly by rotating a seal retainer ring. Alternatively, a sealing element may be removably disposed with the LP-RCD bearing assembly with a seal support member threadedly attached with the LP-RCD bearing assembly. The seal support member may be locked in position with a seal locking ring removably attached with threads with the LP-RCD bearing assembly over the seal support member. Spaced apart accumulators may be disposed radially outward of the bearings in the bearing assembly to provide self lubrication to the bearings. | 01-29-2015 |
20150136407 | ROTATING CONTROL DEVICE DOCKING STATION - A system and method is provided for converting a drilling rig between conventional hydrostatic pressure drilling and managed pressure drilling or underbalanced drilling using a docking station housing mounted on a marine riser or bell nipple. This docking station housing may be positioned above the surface of the water. When a removable rotating control device is remotely hydraulically latched with the docking station housing, the system and method allows for interactive lubrication and cooling of the rotating control device, as needed, along with a supply of fluid for use with active seals. | 05-21-2015 |
Patent application number | Description | Published |
20130288012 | CONTOURED VENEER AND METHOD OF MAKING SAME - A contoured wood sheet and a method of making a contoured wood sheet are provided. The contoured wood sheet has a length, a height, and a width, and a top side that is spaced apart from a rear side by the height. The width of the contoured wood sheet varies across at least a part of the length to define the contour of the contoured wood sheet. The contoured wood sheet comprises a plurality of wood elements that have the same length and height as the contoured wood sheet, and the width of at least one wood element varies along its length. The wood elements are joined together along the edges extending in the direction of the length of the wood elements. | 10-31-2013 |
20140027020 | METHOD FOR PRODUCING A VENEER - Method for manufacturing second wood sheets from first wood sheets, comprising steps (i) to (iv): (i) providing first wood sheets having a laminarly developed front side and backside, wherein the moisture content of said first wood sheets is below the fiber saturation point of the wood; (ii) applying a water-comprising adhesive to one or more front sides and/or one or more backsides of said first wood sheets provided in step (i); (iii) adhering said wood sheets from step (ii) and optionally from step (i) with laminar sides to each other in order to form a block which comprises adhered layers of said first wood sheets, wherein the adhering is performed such to increase the moisture content of said formed block up to or above the fiber saturation point of the wood; (iv) slicing said block formed in step (iii) to form said second wood sheets. | 01-30-2014 |
20150027586 | Method and Apparatus for Producing Figured Veneer - A method for making a piece of figured veneer comprises softening lignin in a sheet of veneer, and advancing the sheet of veneer between a first roller having a semi-flexible outer surface and a second roller. Apparatus for making a piece of figured veneer comprises a device for softening lignin in a sheet of veneer, and first and second rollers between which the sheet of veneer is pressed. The first roller has a semi-flexible outer surface. | 01-29-2015 |
Patent application number | Description | Published |
20080298096 | Dual voltage wye-connected H-bridge converter topology for powering a high-speed electric motor - A topology for a three-phase, wye-connected H-bridge converter allowing continued operation when one H-bridge phase has failed by bypassing the failed H-bridge, increasing dc-bus voltage to provide the required output load voltage, and decreasing switching frequency to reduce power losses in semiconductor switches. In normal operation, the dc-bus voltage is operated at a lower voltage, improving the reliability of power semiconductor devices. When an H-bridge is bypassed, the dc-bus is operated at a higher voltage but lower effective switching frequency, reducing semiconductor losses, allowing the converter to put out more current with the same temperature rise in the power switches. | 12-04-2008 |
20080298098 | Zero-current notch waveform for control of a three-phase, wye-connected H-bridge converter for powering a high-speed electric motor - A zero-current, synchronous switching waveform is provided for a three-phase, wye-connected H-Bridge to power an electric motor. The switching waveform includes two notches per cycle on the switching waveform provided to each of the semiconductor switches to minimize total harmonic distortion and switching loss. Positioning of the notch with respect to the zero-current crossing is optimized to reduce switching loss and minimize total harmonic distortion. | 12-04-2008 |
20080316778 | 7-Level wye-connected H-bridge converter topology for powering a high-speed electric motor - A 7-level wye-connected H-bridge converter that provides redundancy for continued operation when one bridge phase has failed and more particularly to a topology that includes multiple semiconductor H-bridges and a three-phase semiconductor mid-bridge. The converter may continue operation with failure of any bridge, as a three-phase, wye-connected H-bridge by bypassing the failed bridge. Individual bridges of the converter may be operated at different dc-bus voltages to maximize power output. The converter may employ synchronous gating signals for the semiconductor devices of the bridges, including a zero-current notch waveform for minimizing harmonic distortion of the output waveform. | 12-25-2008 |
20090322081 | WIND TURBINE WITH PARALLEL CONVERTERS UTILIZING A PLURALITY OF ISOLATED GENERATOR WINDINGS - A system and method are provided to isolate outputs of parallel converter threads of a power system converter on a generator side of a wind turbine generator by utilizing isolated power windings on the wind turbine generator. Such isolation eliminates the circulating common mode current between the parallel converters of the wind turbine system and eliminates the need for a common mode inductor. System reliability is enhanced and total system cost is reduced. | 12-31-2009 |
20090322082 | WIND TURBINE WITH PARALLEL CONVERTERS UTILIZING A PLURALITY OF ISOLATED TRANSFORMER WINDINGS - A system and method are provided to isolate outputs of parallel converter threads of a power system converter of a wind turbine generator by utilizing isolated power windings on the output transformer from the converter. Such isolation eliminates the circulating common mode current between the parallel converters of the wind turbine system and eliminates the need for a common mode inductor. System reliability is enhanced and total system cost is reduced. | 12-31-2009 |
20090322083 | OPTIMIZING CONVERTER PROTECTION FOR WIND TURBINE GENERATORS - An integrated fault and personnel protection system and method for a multi-thread converter in a wind turbine power system is provided. The structure and method provide for system optimization, as well as, arc flash protection. Fault sensing with means of removing power applied to the converter minimizes the energy available to produce an arc flash event. Sensing and disconnects devices for the protections are provided close to the source of energy to protect more of the system. Converter controls detect, identify and isolate faults selecting the best combinations of the novel specific fault isolation devices. Components are distributed into separate physical to enhance protection. | 12-31-2009 |
Patent application number | Description | Published |
20140049859 | Alternative Power Converter System - An energy power converter system is provided. According to one embodiment, the system includes a plurality of parallel converters; a main transformer with a separate magnetic path for magnetic fields are generated in the transformer by a summation of currents coming from the plurality of parallel converters electrically coupled to the main transformer; and a converter control device electrically coupled to the plurality of parallel converters and the main transformer. The converter control device may be configured to discontinue electrical flow in the system based at least in part on detection of an electrical fault condition. | 02-20-2014 |
20140091627 | SYSTEMS, METHODS, AND APPARATUS FOR A GATE DRIVER CIRCUIT FOR AN ALTERNATIVE ENERGY POWER SUPPLY - Certain embodiments of the disclosure may include systems, methods and apparatus for providing a gate driver circuit for an alternative energy power supply. According to an example embodiment of the disclosure, a gate drive circuit for an alternative energy power supply may be provided. The gate drive circuit may include one or more switching device units operated in parallel. The gate driver circuit is configured to selectively control the multiple the switching devices in order to balance currents between each of the parallel-connected switching devices. | 04-03-2014 |
20140145508 | Power Unit Control System - A system is provided that includes a plurality of power units each configured to supply power. Additionally, the system includes a plurality of contacts each configured to toggle an electrical connection of each of the plurality of power units as a network. Moreover, the network is configured to supply power to a load. Furthermore, the system includes a controller configured to control when each of the plurality of contacts toggle according to a power state, and the power state includes information regarding a charge of each power unit, a load demand, and a supplied power being supplied by the plurality of power units. | 05-29-2014 |
20140159643 | Systems and Methods for Controlling Battery Charging - Systems and methods for controlling battery charging are disclosed. According to one embodiment of the disclosure, a method can include receiving battery state information; determining, based on the battery state information, whether to adjust battery models; and, if so, adjusting the battery models. | 06-12-2014 |
20140184308 | SYSTEMS AND METHODS FOR CONTROL OF POWER SEMICONDUCTOR DEVICES - A device includes a controller configured to regulate one or more voltages applied to a gate of an insulated gate bipolar transistor (IGBT). The controller is configured to receive one or more voltage values associated with the IGBT, and generate a gating signal and transmit the gating signal to the IGBT. The gating signal is configured to activate or deactivate the IGBT. The controller is configured to generate a voltage clamping signal and transmit the voltage clamping signal to activate or deactivate an active switching device. The active switching device is configured to periodically limit the one or more voltage values associated with the IGBT based at least in part on one or more characteristics of the voltage clamping signal. | 07-03-2014 |