Du, TX
Changan Mike Du, Plano, TX US
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20110257944 | MODELING HYDRAULIC FRACTURING INDUCED FRACTURE NETWORKS AS A DUAL POROSITY SYSTEM - A method for calibrating fracture networks. The method includes estimating an average fracture width of a fracture network using one or more of net fracturing pressure, Poisson's ratio, shear modulus, and fracture height; determining microseismic event envelope and base intensity data using a three-dimensional geomodel including microseismic event data; and determining hydraulic fracturing treatment (HFT) fracture intensity of post-hydraulic fracturing treatment (post-HFT) based on the average fracture width and HFT volume data. The method further includes calibrating the base intensity data to the HFT fracture intensity to obtain calibrated HFT fracture intensity, determining a proppant transportation and distribution scenario, and generating a dual porosity reservoir model based on the calibrated HFT fracture intensity and the proppant transportation and distribution scenario. | 10-20-2011 |
David Du, Houston, TX US
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20160025240 | Pipelaying - A mudmat for a subsea pipeline accessory has a body with an accessory support structure arranged to lie underneath and support an accessory. At least one foundation element attached to the body is movable from a stowed position at least partially under the accessory support structure into a deployed position extending laterally from the accessory support structure after overboarding the accessory from a vessel and before landing the accessory on the seabed. Two or more foundation elements may be deployed simultaneously in laterally-opposed directions transverse to the longitudinal axis of a pipe that supports the accessory. | 01-28-2016 |
David Y. Du, Houston, TX US
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20150284926 | EXPLOSIVE PILE DEVICE FOR INCREASING PILE CAPACITY - The invention is related to a device having an explosive device wherein said device is located at a tip or attached along a length of a pile, and the method using thereof. The device comprises at least one main pipe connection and a bearing pipe, both of which have same diameters as to the pile, whereas the explosive device is installed within the bearing pipe. After a controlled detonation of the explosive device, the bearing pipe expands both in diameter and volume, which has cross-sections of ellipse-like or lantern-like shapes. | 10-08-2015 |
Fuliang Du, Navasota, TX US
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20120329125 | GROUP CULTURE SYSTEM AND METHOD WITH HELPER EMBRYOS - Methods and systems for physically separating helper embryos from desired embryos in a group culturing technique in order to maintain the pedigree and genetic information of the desired embryos from different species, including cattle and human, and to provide the developmental benefits of group culturing. The separation of the groups of embryos can be the result of embedding one group of embryos in a gel or solid, or the groups can be physically separated by a membrane or other structure. | 12-27-2012 |
Haibin Du, The Colony, TX US
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20140315334 | INTEGRATED CIRCUIT PACKAGE INCLUDING EMBEDDED THIN-FILM BATTERY - An integrated circuit package is provided with a thin-film battery electrically connected to and encapsulated with an integrated circuit die. The battery can be fabricated on a dedicated substrate, on the die pad, or on the integrated circuit die itself. | 10-23-2014 |
Hao Du, Sugar Land, TX US
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20160055466 | GPS-BASED TOLL COLLECTION SYSTEM AND METHOD - An automatic toll collection system includes a mobile app that receives a plurality of toll gantry information from a database, reads GPS location data received front the mobile device hosting the app, and creates a plurality of trip segments using the GPS location data and time stamp. The system then determines whether the mobile device is travelling on a road where toll ought to be collected by comparing the trip segments with the toll gantry information. If the vehicle is passing through a gantry or toll road, the system will then calculate toll charges based on the trip segments and gantry information, generate a toll charge transaction, and notify the mobile user of the toll charge. | 02-25-2016 |
Jiancheng Du, Plano, TX US
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20120033635 | Method, Apparatus and System for Bearing Circuit Switched Domain Service Data Over Radio Bearer - A method for bearing CS-domain service data over radio bearer is disclosed. The method includes: letting CS-domain service data be borne over a radio high-speed packet data access channel according to a channel mapping relation between CS-domain service data and the radio high-speed packet data access channel. An apparatus and a system are also provided herein. | 02-09-2012 |
Lianxiang Du, Austin, TX US
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20110033247 | Effective Approach to Preventing and Remedying Distresses in Soils and Construction Materials - This invention describes a simple and effective method, through introducing fluoride ion releasing agent/salt(s), such as sodium fluoride, for preventing, reducing or eliminating the undesirable construction heave/expansion/distresses/damage, characterized by loss of dimensional stability and integrity of expansive soil layers or concrete structural elements, primarily caused by the formation of ettringite or similar minerals. We demonstrated the technology that can be easily applied to new construction sites and to the sites where repair/retrofit of the existing or potential distresses in soil subgrade, base, subbase, or construction materials is needed. Experiments have demonstrated the effectiveness and efficiency of the technology with applications to stabilization of soils with all range of aluminum and sulfate contents including more than 3000 ppm of sulfate, and to treating cementitious construction materials. This invention can also extend the application of lime to stabilization of sulfate-rich soils and remedy of foundation movement or tilting of buildings caused by the formation of ettringite. | 02-10-2011 |
20120216720 | Effective Approach to Preventing and Remedying Distresses in Soils and Construction Materials - Methods for preventing, reducing, or eliminating construction heave, expansion, distresses, and damage primarily caused by the formation of ettringite are disclosed including introducing fluoride ion releasing agent/salt(s), such as sodium fluoride, calcium fluoride, and potassium fluoride, to expansive soil layers or concrete structural elements and allowing the fluoride ion releasing agent/salt(s) at ambient temperature to react with formed ettringite and to prevent the formation of ettringite of the expansive soil layers or concrete structural elements. Other embodiments are described and claimed. | 08-30-2012 |
Michael H. Du, Manvel, TX US
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20160053578 | Shear Valve System And Methodology - A technique facilitates control of fluid flows in a wide variety of applications and environments, including downhole well environments. The technique utilizes a valve system which may include a shear seal valve for controlling fluid flows. The valve system utilizes port arrangements, components for energizing shear seals between mating components, and/or actuating components with improved degrees of freedom. The components facilitate repeatable and consistent actuation and operation of the valve system in the wide variety of applications and environments. | 02-25-2016 |
Michael Hui Du, Pearland, TX US
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20100202896 | PUMP MOTOR PROTECTOR WITH REDUNDANT SHAFT SEAL - An electric submersible pump device having a motor part, a pump part, and a protector part. The protector part includes redundant shaft seal parts. | 08-12-2010 |
20110168406 | DOWNHOLE HYDRAULIC COUPLING ASSEMBLY - A completions system utilizing a unique hydraulic coupling. The system includes an upper completion stinger configured for coupling to a lower completion tubular. Both the stinger and the tubular are outfitted with hydraulic lines therethrough. Thus, as the stinger is coupled to the tubular, hydraulic lines are also coupled. However, the termination of each line is sealingly covered by a slidable sleeve in advance of attaining the coupling between the stinger and tubular. Therefore, the lines are protected from contamination during potentially significant periods of well deployment that may occur in advance of completed coupling and system installation. Furthermore, the manner of hydraulic coupling between the stinger and tubular reduces the likelihood of damage to the hydraulic lines during the installation process. | 07-14-2011 |
20120073835 | ORIENTABLE ECCENTRIC DOWNHOLE ASSEMBLY - An assembly employing multiple eccentric devices about a mandrel. The assembly is configured such that at least one of the eccentric devices is adjustably orientable relative another. Thus, for example, where the devices are packers disposed about completions tubing, the adjustable orientation may be utilized to ensure enough clearance is available for downhole advancement of the assembly. As such, the assembly may remain eccentric in nature without concern over damage during positioning, particularly to a communication line running to actuatable implements of equipment coupled to the completions assembly. | 03-29-2012 |
Michael Hui Du, Manvel, TX US
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20140322038 | Pump Motor Protector with Redundant Shaft Seal - An electric submersible pump device having a motor part, a pump part, and a protector part. The protector part includes redundant shaft seal parts. | 10-30-2014 |
20150362100 | Rotary Shouldered Connections and Thread Design - A thread structure in accordance to one or more embodiments includes a thread extending helically along the cylindrical member in spaced thread turns, the thread having a crest extending between a first flank and a second flank and a root extending between the thread turns, the root having a curvature defined by a portion of an ellipse tangentially adjoining the first and second flank at respective flank transition points, the ellipse having a major axis extending parallel to the axis and a minor axis extending perpendicular to the major axis and through a root bottom. | 12-17-2015 |
20150367402 | Cold Rolling Devices and Colled Rolled Rotary Shouldered Connection Threads - A method of cold rolling a thread on a tubular support member of a rotary shouldered thread connection includes obtaining an original root depth of a thread root, cold rolling the thread until a minimum increased root depth tolerance is achieved. The thread may be cold rolled with a wheel tip having an elliptical profile. | 12-24-2015 |
Qinghe Du, College Station, TX US
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20100189069 | Joint Carrier Allocation and Time Sharing for OFDMA/TDMA Networks - A method and system provide multiple-access control and frequency band allocation, and transmission time sharing among multiple users in orthogonal frequency-division multiple-access (OFDMA) and time-division multiple-access (TDMA) networks. The method can be applied to uplinks and downlinks of multi-user, multi-carrier communication networks. Under a total transmission-power minimization constraint, the method can allocate carriers and transmission time to users optimally, and at the same time, can guarantee a data rate or equivalently a latency requirement of each user. | 07-29-2010 |
20100246375 | Carrier Allocation and Time Sharing FOR OFDMA/TDMA Networks - A method allocates bandwidth to channels in an orthogonal frequency division multiple access and time division multiple access (TDMA) network. The network includes a master device (master) communicating with a set of slave devices (slaves). The master defines a set Ψ | 09-30-2010 |
20100260276 | Zero Correlation Zone Based Preamble for Oversampled OFDM Networks in URWIN - In an oversampled orthogonal frequency-division multiplexing (OFDM) orthogonal network, the preamble used for time synchronization does not have an ideal autocorrelation function due to guard bands, which degrade the accuracy of symbol timing. Therefore, a zero-correlation-zone (ZCZ) based preamble is used for time synchronization. Across correlation function (CCF) used for time synchronization is forced to 0 within a certain region around a main lobe. The length of the ZCZ is guaranteed to be larger than a cyclic prefix length of OFDM data symbols synchronization accuracy. | 10-14-2010 |
Quangen Du, Fresno, TX US
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20130061937 | TEMPERATURE COMPENSATED ACCUMULATOR - A temperature compensated accumulator is provided. | 03-14-2013 |
20130062069 | ACCUMULATOR HAVING OPERATING FLUID VOLUME INDEPENDENT OF EXTERNAL HYDROSTATIC PRESSURE - A method and device for maintaining pressure in an accumulator for subsea wellbore operations is disclosed. | 03-14-2013 |
20130092389 | PIPING SYSTEM HAVING AN INSULATED ANNULUS - A piping system for housing system components for regulating the flow of fluid therethrough is provided. The piping system includes an inner small diameter length of piping through which hot fluids flow, an outer larger diameter length of piping surrounded by cold fluid, and an annulus between the small and larger diameter piping in which the system components are received. Insulation material extends about a predetermined section of the small diameter length of piping for restricting heat transfer therefrom to the system components in the annulus and allowing heat transfer from the system components in the annulus to the outer piping. | 04-18-2013 |
Robert Du, Houston, TX US
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20160090811 | Wellbore Sealing With Hybrid Wicker System - A wellbore system includes a sealing assembly for creating an annular seal between wellbore members. The sealing assembly includes a wicker profile defined a first sealing surface for engaging and embedding into a radially adjacent, second sealing surface. The wicker profile includes a first section having a first hardness and a second section adjacent to the first section and having a second hardness greater than the first hardness. Both the first and second sections of wickers are embedded into the second sealing surface, and can thus provide a high degree of both sealing and lockdown performance. | 03-31-2016 |
Shu Du, Richardson, TX US
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20090191874 | SYSTEM AND METHOD FOR MANAGING RADIO LINK FAILURES - A wireless transmit/receive unit (WTRU) ( | 07-30-2009 |
20100189024 | PS-Poll Transmission Opportunity in WLAN - Embodiments of the invention provide a dynamic priority adjustment algorithm for PS-Poll packets in WLAN and dynamic CW (contention window) management algorithm for PS-Poll packets in WLAN. These improve the performance of traffic flows associated with STAs in power save mode. Maintain the QoS requirements of the traffic flows. When PS-Poll packets are not able to be sent, the QoS STA will experience a long delay of the downlink data, even if the downlink data has been assigned a higher AC. The delay may potentially violate the QoS bound required by the data flow. Using the embodiments can significantly decrease the probability of this event. | 07-29-2010 |
20100214942 | ADAPTIVE PERIODIC POWER-SAVE (PS) POLLING - In accordance with at least some embodiments, a system includes an access point and a station in communication with the access point. The station selectively implements adaptive periodic Power-Save (APPS)-Polling logic for communications between the station and the access point. The APPS-Polling logic is configured to determine a timer value for periodic PS-Polling by monitoring a periodicity of arrival packets for at least a threshold amount of time. | 08-26-2010 |
20100272192 | OFDM-Lite Architecture for HomePlug - A device for communicating digital data over power lines includes a power line interface for transmitting data over at least one band of frequencies. An orthogonal frequency division multiplexing (OFDM) modulation unit generates OFDM symbols using a set of tones for the frequency band. A preamble generation unit generates preamble sequences for the frequency band by using the set of tones used by the OFDM modulation unit. The tones used by the preamble generation unit have a constant magnitude, and a set of phases obtained by quantizing to a small alphabet the phase of a set of tones obtained by taking an IFFT of a portion of a preamble used by a non-interoperable powerline access device. The device may transmit on two or more bands using a sampling frequency clock, wherein a lower band clock frequency is equal to or an integer divisor of a higher band clock frequency. | 10-28-2010 |
20110182178 | Randomization Management For Carrier Sensing Multiple Access with Collision Avoidance (CSMA-CA) - In at least some embodiments, a communication device includes a transceiver with Carrier Sensing Multiple Access with Collision Avoidance (CSMA-CA) logic. The CSMA-CA logic provides dynamic randomization management for a contention window size. | 07-28-2011 |
20110185075 | SYSTEM AND METHOD FOR PREVENTING COLLISIONS IN A HIERARCHICAL NETWORK - A system and method for reducing transmission collisions. In one embodiment, a transmitter for communicating of a smart grid power line network includes an arbiter. The arbiter is configured to select a transmission interval during which the transmitter can transmit. The interval is selected from a plurality of available transmission intervals reserved for contending transmissions, and selected based on a level of a hierarchical network at which the transmitter is located. The interval selected is different from any interval used by a different transmitter spaced two hierarchical levels away from the level of the hierarchical network at which the transmitter is located. | 07-28-2011 |
Yan Du, Austin, TX US
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20160076083 | METHODS AND DEVICES RELATED TO TOEHOLD-BASED STRAND DISPLACEMENT WITH LOOP-MEDIATED ISOTHERMAL AMPLIFICATION - Disclosed are compositions and methods for isothermal nucleic acid amplification and detection. | 03-17-2016 |
Yang Du, Austin, TX US
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20150073150 | BLENDS OF AMINES WITH PIPERAZINE FOR CO2 CAPTURE - Compositions and methods related to the removal of acidic gas. In particular, the present disclosure relates to a composition and method for the removal of acidic gas from a gas mixture using a solvent comprising a blend of piperazine and at least one diamine or triamine. | 03-12-2015 |
Yinggang Du, Austin, TX US
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20120222882 | CABLE MANAGEMENT AND IDENTIFICATION DEVICE - A cable management device is provided, which includes a first leg and a second leg connected by a connecting crown member. A first protrusion extends from the first leg. A second protrusion extends from the second leg. The first leg and the second leg both include an aperture. The cable management device includes passageway defined by an inner-surface of the first leg, an inner-surface of the second leg, and an inner-surface of the connecting crown member. The passageway is operable to hold a cable. | 09-06-2012 |
Yue Du, Houston, TX US
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20150260036 | GEOPHYSICAL PROSPECTING BY PROCESSING VERTICAL SEISMIC PROFILES USING DOWNWARD CONTINUATION - Geophysical prospecting may be achieved using borehole seismic data and processing velocity seismic profiles using downward continuation to simulate the seismic source being at the depth of the borehole receivers. Such methods may involve collecting seismic data for a subterranean formation with at least one borehole receiver; grouping the seismic data into a one common receiver gather corresponding to each borehole receiver; performing a downward continuation on at least one of the common receiver gathers to produce corresponding downward continued common receiver gathers; performing a normal moveout analysis on at least one of the downward continued common receiver gathers to produce corresponding semblance velocity spectra; and analyzing at least one of the semblance velocity spectra for a zone of interest in the subterranean formation. | 09-17-2015 |
20150316671 | Migration Velocity Analysis Method for VSP Data - Vertical Seismic Profile (VSP) analysis is a technique commonly used to conduct geophysical surveys of subterranean features. The processing of a VSP includes several steps, usually including a final step of depth migration. In order to properly process and image VSP data using depth migration, a velocity model of the subsurface must be known or derived. A variety of criteria can be used to ascertain whether the velocity used for migration is accurate. | 11-05-2015 |