Jianlong
Jianlong Cheng, Xi'An CN
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20130098681 | COMBINED FRACTURING AND PERFORATING METHOD AND DEVICE FOR OIL AND GAS WELL - A combined fracturing and perforating method and device for oil and gas well are disclosed. The method utilizes an explosion of a perforating charge ( | 04-25-2013 |
20130145924 | STRUCTURE FOR GUNPOWDER CHARGE IN COMBINED FRACTURING PERFORATION DEVICE - This invention provides a structure for gunpowder charge for charging gunpowders of different rates in combined fracturing perforation devices. The structure for gunpowder charge is convenient to mount and transport. In one embodiment, said structure for gunpowder charge comprises an inner gunpowder box located between adjacent perforating charges in the charge frame of a perforation device, and an outer gunpowder box attached to the outer wall of the charge frame, wherein said outer gunpowder box comprises one or two box units ( | 06-13-2013 |
20130146287 | COMPOSITE PERFORATION METHOD AND DEVICE WITH PROPPING AGENT - The present invention provides composite perforation methods and device with propping agent capable of effectively propping the fractures in the oil layer, thereby reducing the closure of fractures and prolonging the oil extraction cycle. The device comprises one or more connected perforators wherein each of said perforator comprises one or more perforating charges and a propping agent unit | 06-13-2013 |
20140053715 | COMPOSITE PERFORATION DEVICE WITH SCALLOPS ON THE INNER WALL - The present invention relates to a composite perforating device with scallops on its inner wall to improve the depth of penetration in the oil reservoir during perforation of oil and gas well. In one embodiment, the scallops on the inner wall of the gun body are located at a position corresponding to the open end of a perforating charge. In one embodiment, the scallop may have a stepped-cylindrical or truncated-conical inner peripheral surface and a conical or flat bottom surface. Alternatively, the scallop may have an inner conical surface. The scallops on the inner wall of the gun body increased the burst heights of the perforating charges such that the penetration depth of the perforating device is increased. | 02-27-2014 |
20140060295 | STRUCTURE FOR GUNPOWDER CHARGE IN MULTI-FRAC COMPOSITE PERFORATING DEVICES - This invention provides a structure for gunpowder charge in multi-frac composite perforation devices that is easy to assemble and transport while the charge volume of gunpowder is increased. In one embodiment of the present invention, an triplet outer gunpowder box is attached onto the outer wall of the charge frame and comprises one middle gunpowder box charged with gunpowder of certain burning rate, and two side-hung gunpowder boxes charged with gunpowder of another burning rate. The two side-hung gunpowder boxes are separately located on the two sides of the middle gunpowder box and are connected with the middle gunpowder box as a unit. The middle gunpowder box is located at a position corresponding to the perforating charge, and has an inner groove for orienting the perforating charge and a through hole through which the jet flow passes. | 03-06-2014 |
20150107831 | STRUCTURE FOR GUNPOWDER CHARGE IN MULTI-FRAC COMPOSITE PERFORATING DEVICE - This invention provides a multi-frac composite perforation device having (i) a gun body having an outer wall, (ii) an inner gunpowder box between adjacent perforating charges in the charge frame | 04-23-2015 |
Jianlong Cheng, Shaanxi CN
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20110318088 | CABLE HEAD FOR PETROLEUM LOGGING - A cable head for petroleum logging includes a first connector and a second connector; there is a tension rod between the first connector and the second connector; a first piston, a second piston and a third piston are successively provided on the upper part, the middle part and the lower part of the first connector; the diameter of the second piston is greater than the diameters of the first and third piston respectively; the first and second piston are sealed and mounted inside a first cylinder; the third piston is sealed and mounted inside a second cylinder; the lower part of the second cylinder is fixedly connected with the second connector; a balance cavity is formed between the lower end face of the second piston and the upper end face of the second cylinder when the lower end face of the first cylinder is contacted with the upper end face of second cylinder; the balance cavity communicates with the external by a passage on the first or second cylinder; an axial projected area of the lower end face of the second piston is equal to a cross section area of the first piston. When the cable head is stuck in the well in use, the logging cable can be disconnected by breaking the tension rod, thus it is no need to overcome the pressure of fluid in the deep well. | 12-29-2011 |
Jianlong Feng, Zhongshan CN
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20150098838 | MOTOR CONTROLLER AND FAN SYSTEM COMPRISING THE SAME - A motor controller, including: a supporting frame, a control circuit board, and a control box. The control box includes: a cavity, a base plate, and a plurality of fins. The control circuit board is disposed on the base plate in the cavity. The fins are disposed outside the cavity on an outer side surface of the base plate. Cooling ducts are formed between adjacent fins. The control box is fixed on the supporting frame. | 04-09-2015 |
20150207443 | METHOD FOR INCREASING ROTATIONAL SPEED RANGE OF ECM MOTOR - A method for increasing rotational speed range of an ECM motor, including: 1) starting the motor and initializing parameters; 2) reading the rotor position signal from the hall sensor by the microprocessor and updating the rotor angle; 3) reading the DC bus current I and the rotational speed n of the motor; 4) inputting a target rotational speed S from an external device, acquiring the target rotational speed S by the microprocessor, calculating the rotational difference e, and utilizing a rotational speed PI regulator to output a regulating parameter V_D; 5) calculating an advance angle α=F(I, n) by the microprocessor, and calculating a real-time angle of the rotor θ=ω×t by the microprocessor; and 6) calculating a PWM signal input into the inverter circuit, and outputting a PWM chopper voltage U by the inverter circuit, where U=F(V_D, θ+α). | 07-23-2015 |
Jianlong Fu, Beijing CN
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20160117574 | Tagging Personal Photos with Deep Networks - Techniques and constructs to facilitate automatic tagging can provide improvements in image storage and searching. The constructs may enable training a deep network using tagged source images and target images. The constructs may also train a top layer of the deep network using a personal photo ontology. The constructs also may select one or more concepts from the ontology for tagging personal digital images. | 04-28-2016 |
Jianlong Gao, Chengdu CN
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20120099354 | CIRCUITS AND METHODS FOR ALTERNATING CURRENT-TO-DIRECT CURRENT CONVERSION - An AC-to-DC converter for converting an AC voltage to a DC voltage includes a first converter, a second converter, a sense circuit, a controller, and an enabling circuit. The first converter converts an AC voltage to a first DC voltage. The second converter converts the first DC voltage to a second DC voltage. The sense circuit coupled to the first and second converters provides a first sense signal indicative of the first DC voltage and a second sense signal indicative of the AC voltage. The controller coupled to the first and second converters controls the first and second DC voltages. The enabling circuit coupled to the sense circuit generates a control signal to the controller to disable both the first converter and the second converter by comparing the first sense signal to a first threshold voltage and comparing the second sense signal to a second threshold voltage. | 04-26-2012 |
20120243269 | Circuits and Methods for Controlling Power Converters Including Transformers - A circuit includes a transformer and a controller. The transformer includes a primary winding and a secondary winding, and operates in multiple switching cycles. A switching cycle includes a charging period and a discharging period. During the charging period, the transformer is powered by the input voltage and a current flowing through the primary winding increases. During the discharging period the transformer discharges to power the load and a current flowing through the secondary winding decreases. The controller includes a pin that receives a first feedback signal indicating the input voltage during the charging period and receives a second feedback signal indicating an electrical condition of the secondary winding during the discharging period. The controller generates a first control signal and a second control signal to regulate the input voltage and an output current flowing through the load, respectively. | 09-27-2012 |
Jianlong Xiao, Chengdu CN
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20150121130 | DATA STORAGE METHOD, DATA STORAGE APPARATUS, AND STORAGE DEVICE - In a backup method, a first controller of a storage system receives a file process request, and divides the file process request into a plurality of file operations. The first controller processes each of the file operations to generate multiple pieces of file operation information. And then, the first controller writes all of the multiple pieces of file operation information into a cache protected area. When the first controller fails, it stores the multiple pieces of file operation information to a disk protected area of a disk in the storage system. After the first controller is powered on again, the first controller copies the multiple pieces of file operation information from the disk protected area to the cache protected area. And then, it writes the file operation information into a write cache. At last, the first controller stores the file operation information into a disk of the storage system. | 04-30-2015 |
Jianlong Zhang, Xiamen City CN
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20140306555 | VOICE COIL MOTOR ASSEMBLY - A voice coil motor assembly includes a coil support, a coil wound on the coil support, and two opposing lower elastic plates disposed on an upper part of the coil support. The outer edge of an upper flange of the coil support has at least two opposing protrusions which are arranged radially. The coil has a head end and a tail end which are respectively wound on the two protrusions. The two lower elastic plates are respectively connected with the coil wound on the two protrusions by welding. To prevent the head end from slanting, the lower elastic plates are mounted on the coil support through the operation of an automation apparatus to be soldered with the coil wound on the protrusions. The connection of the coil and the lower elastic plates is firm, without the problem of disconnection, to ensure the quality of the product of the voice coil motor assembly. | 10-16-2014 |
Jianlong Zou, Shenzhen CN
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20160111968 | Inverter Power Supply System - An inverter power supply system includes an inverter circuit and a feedback circuit, where the inverter circuit is configured to convert a first alternating current voltage into a second alternating current voltage, and convert a first alternating current into a second alternating current; the feedback circuit determines whether a value of the second alternating current voltage exceeds a preset threshold; and when the value of the second alternating current voltage exceeds the preset threshold, the feedback circuit acquires a feedback current, compensates for a reference value of the first alternating current according to the feedback current, generates a control signal according to a reference value, after compensation, of the first alternating current, and outputs the control signal to the inverter circuit to adjust the value of the second alternating current voltage. | 04-21-2016 |