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32results about How to "Reduce engineering complexity" patented technology

Non-effective earthing distribution system fault locating method based on neutral point of transient traveling wave

InactiveCN101232176ASolve hard-to-reach puzzlesFix speed inconsistenciesEmergency protective circuit arrangementsFault locationTransient stateDistribution transformer
The invention discloses a method for locating fault of power distribution system with ineffectively grounded neutral point based on transient traveling wave, which can acquire required traveling wave signals and relatively higher detection reliability by arranging equipment only on both sides of circuit. According to the actual site condition, a non-contact electromagnetic field sensor is arranged in a transformer substation to acquire transient voltage and current traveling wave, a power distribution transformer arranged on the tail end of the circuit transmits voltage-variable traveling wave to solve the problem in acquisition of tail-end voltage traveling wave signals, and the type of the fault of the circuit can be rapidly recognized according to the amplitude and the polarity characteristics of a fault traveling wave recorded by the secondary side of the transformer. The invention provides a new fault search algorithm based on the midpoint of time to solve the problem of noncontinuous wave speed of aerial wire and cable. Accordingly, the proposal can achieve the assembly and the operation of the equipment without adding extra primary equipment of the system and powering off the circuit, thus saving the cost and reducing the complex degree of the project. Practical operation shows that the method can locate a fault within a range of plus or minus 100 m.
Owner:WEIFANG UNIVERSITY

Biochemical novel technology capable of realizing solar energy utilization

The invention relates to a biochemical novel technology capable of realizing solar energy utilization. The method comprise the following steps: (1) microalgae in water synthesizes organic matters of the microalgae from inorganic substances of carbon dioxide, water and nutrient elements under a condition of sunlight radiation by photosynthesis, and a microalgae-containing suspension is obtained; (2) dissolved oxygen in water of the microalgae-containing suspension is removed by respiration of the microalgae in the absence of light, and a microalgae suspension without the dissolved oxygen is obtained; (3) the microalgae suspension is directly subjected to anaerobic fermentation without a separation process, and a combustible biogas is obtained, which is gathered and stored to keep in reserve as an energy source; (4) the fermentation liquor after anaerobic fermentation is subjected to aerobic biological oxidation, and the obtained product is recycled by returning to step (1). Compared with the prior art, the biochemical novel technology helps to realize efficient utilization of solar energy, the technology system is extremely simple, and the cost is extremely low.
Owner:SHANGHAI JIAO TONG UNIV

Well leakage prediction method with seismic data

The invention discloses a well leakage prediction method with seismic data, and relates to the technical field of seismic data application of oil and gas field exploration and development. The well leakage prediction method includes the steps that a, high resolution processing is conducted; b, fine horizon correlation is conducted; c, a fold is automatically identified, specifically, formation curvature is obtained along the seismic horizon; d, the fold property is judged, specifically, anticline or syncline are judged according to positive and negative change of the curvature; e, amplitude difference is extracted, specifically, the amplitude difference of each direction in the range of a target layer is calculated with the center of a micro-amplitude fold; f, the micro-amplitude fold amount is calculated, specifically, according to three parameters of positive and negative sign symbols of the curvature, the curvature and an amplitude difference value, the micro-amplitude fold amount is calculated comprehensively; g, the micro-amplitude fold is classified, specifically, according to the calculated micro-amplitude fold amount, the micro-amplitude fold is classified; and h, a well leakage point is predicted, specifically, according to well trajectory coordinates, possible well leakage point positions are picked up from distribution data of the micro-amplitude fold. According to the well leakage prediction method, the accuracy and the efficiency for predicting the fractured leakage point of a horizontal well according to the micro-amplitude fold are significantly improved.
Owner:CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1

Integrated downhole operation tool based on bidirectional slip hydraulic permanent packer

The invention provides an integrated downhole operation tool based on a bidirectional slip hydraulic permanent packer. The operation tool comprises a test valve, a pressure gauge supporting cylinder,a liquid replacing valve, a plugging valve and the bidirectional slip hydraulic permanent packer, wherein the packer comprises an upper mandrel, a lower mandrel, an upper hydraulic outer cylinder, a lower hydraulic outer cylinder, a first shearing fixing piece, a second shearing fixing piece, a third shearing fixing piece, an upper slip, an upper cone, a rubber cylinder, a lower cone, a lower slip, a lock ring assembly, a double-male short section and an annular piston, wherein the upper slip, the upper cone, the rubber cylinder, the lower cone, the lower slip, the lock ring assembly and the double-male short section are sequentially arranged on the upper mandrel in a sleeving mode from top to bottom, and the annular piston is arranged on the lower mandrel in a sleeving mode. The upper endof the test valve can be connected with the upstream of the integrated downhole operation tool, the lower end of the test valve is connected with the upper end of a pressure gauge, the lower end of the pressure gauge is connected with the upper end of the liquid replacing valve, the lower end of the liquid replacing valve is connected with the upper end of the plugging valve, and the lower end ofthe plugging valve is connected with the bidirectional slip hydraulic permanent packer. The integrated downhole operation tool has the functions of oil testing and well completion production.
Owner:CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1

Port multiplexing method in video conference system and server

The invention discloses a port multiplexing method in a video conference system and a server. The server arranged at a terminal and a video conference server can be used for accepting a first connection initiated by the terminal, receiving a register message sent by the terminal via the first connection, and forwarding the register message to the corresponding video conference server, to achieve registration of the terminal on the video conference server; then a conference invitation message sent by one of the terminal or the video conference server can be received and forwarded to the other party, so that the building of a session between the terminal and the video conference server is achieved; and then the at least one connection initiated by the terminal can be received, various typesof media streams sent by the terminal via the at least one connection is received, and forwarded to the video conference server after being converted, and thus a video conference is achieved. According to the method and the server provided by the invention, the effect that the video conference server provides a port for the terminal is achieved, the field deployment engineering complexity of the video conference system is reduced, the potential safety hazards are reduced, and the user experience is enhanced.
Owner:ZTE CORP

Video character end-to-end detection and recognition method based on deep learning

The invention discloses a video character end-to-end detection and recognition method based on deep learning, and belongs to the technical field of video character processing. The method comprises the following steps: performing image size normalization processing on each video frame image of a video sequence segment to be recognized, so that the pre-processed image size is matched with the input of an end-to-end character detection and recognition network; and sequentially inputting the preprocessed images into the end-to-end character detection and recognition network, and obtaining a character recognition result of the video sequence segment to be recognized. According to the invention, end-to-end detection and recognition of video characters are realized, inherent defects such as error accumulation caused by inconsistent multi-module targets are avoided, and the engineering complexity is reduced. In addition, the network structure is optimized through a shared feature extraction network, and meanwhile, a feature map with a relatively large receptive field is input into the recognition branch of the network, so that the feature map can contain information in a larger range compared with input by using an original map, and the recognition accuracy is improved.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Non-effective earthing distribution system fault locating method based on neutral point of transient traveling wave

InactiveCN101232176BSolve hard-to-reach puzzlesFix speed inconsistenciesEmergency protective circuit arrangementsFault locationTransient stateDistribution transformer
The invention discloses a method for locating fault of power distribution system with ineffectively grounded neutral point based on transient traveling wave, which can acquire required traveling wave signals and relatively higher detection reliability by arranging equipment only on both sides of circuit. According to the actual site condition, a non-contact electromagnetic field sensor is arranged in a transformer substation to acquire transient voltage and current traveling wave, a power distribution transformer arranged on the tail end of the circuit transmits voltage-variable traveling wave to solve the problem in acquisition of tail-end voltage traveling wave signals, and the type of the fault of the circuit can be rapidly recognized according to the amplitude and the polarity characteristics of a fault traveling wave recorded by the secondary side of the transformer. The invention provides a new fault search algorithm based on the midpoint of time to solve the problem of noncontinuous wave speed of aerial wire and cable. Accordingly, the proposal can achieve the assembly and the operation of the equipment without adding extra primary equipment of the system and powering off the circuit, thus saving the cost and reducing the complex degree of the project. Practical operation shows that the method can locate a fault within a range of plus or minus 100 m.
Owner:WEIFANG UNIVERSITY

Integrated method for oil testing and well completion

PendingCN110500084AReduce operating proceduresHigh efficiency of oil testing and layer transferSurveyDrilling rodsWell controlDownhole safety valve
The invention provides an integrated method for oil testing and well completion. The integrated method includes the steps that when an oil testing test is performed, an integrated pipe column composedof an upper pipe column and a lower pipe column which are detachably connected is lowered to a downhole predetermined depth, a packer in the integrated pipe column is subjected to setting, the oil testing test is performed, after the oil testing test is completed, a plugging valve is activated to perform shut-in downhole, and the upper pipe column and the lower pipe column are separated and the upper pipe column is lifted out; and when well completion and production are performed, a completion pipe column with a downhole safety valve is lowered into the bottom of a well and connected with thelower pipe column in a back inserting and abutting mode, the plugging valve is opened by pressure from an annulus or an oil pipe to realize well completion, and well completion and production are performed. The integrated method has the beneficial effects that the method has the advantages of saving operation procedures, being high in efficiency of well testing transfer, reducing engineering complexity, protecting oil and gas layers, reducing well control risks, reducing costs and the like.
Owner:CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1

An integrated downhole operation tool based on a two-way slip retrievable hydraulic packer

ActiveCN110778288BReduce operating proceduresHigh efficiency of oil testing and layer transferSealing/packingBlocked valvesStructural engineering
The invention provides an integrated downhole operation tool based on a two-way slip retrievable hydraulic packer. The working tools include: a test valve, a pressure gauge holder, a fluid replacement valve, a plugging valve and a two-way slip retrievable hydraulic packer. Wherein, the packer includes: a central mandrel, a first shearing fixture, a second shearing fixture, a third shearing fixture, and a liquid cylinder sleeved on the outer wall of the central mandrel in sequence from top to bottom The outer cylinder, the locking mandrel and the limit assembly are sequentially sleeved on the outer wall of the locking mandrel, the annular piston, the locking ring assembly, the rubber tube, the cone and the slips. The upper end of the test valve is connected to the upstream of the integrated downhole operation tool, the lower end of the test valve is connected to the upper end of the pressure gauge, the lower end of the pressure gauge is connected to the upper end of the replacement valve, the lower end of the replacement valve is connected to the upper end of the blocking valve, and the lower end of the blocking valve is connected to the two-way Slips recoverable hydraulic packer connection. The invention has the functions of oil testing and well completion and putting into production at the same time, and can be recycled and used.
Owner:CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1

Integrated downhole operation tool based on two-way slip hydraulic permanent packer

The invention provides an integrated downhole operation tool based on a two-way slip hydraulic permanent packer. The working tool includes: a test valve, a pressure gauge holder, a liquid replacement valve, a plugging valve and a two-way slip hydraulic permanent packer. Wherein, the packer includes: an upper mandrel, a lower mandrel, an upper hydraulic outer cylinder, a lower hydraulic outer cylinder, a first shearing fixture, a second shearing fixture, a third shearing fixture, and From top to bottom, the upper slip, the upper cone, the rubber tube, the lower cone, the lower slip, the lock ring assembly, the double male nipple, and the annular piston sleeved on the lower mandrel are set on the upper mandrel in sequence. The upper end of the test valve can be connected to the upstream of the integrated downhole operation tool, the lower end of the test valve is connected to the upper end of the pressure gauge, the lower end of the pressure gauge is connected to the upper end of the replacement valve, and the lower end of the replacement valve is connected to the upper end of the plugging valve , the lower end of the plugging valve is connected with the two-way slip hydraulic permanent packer. The invention has the functions of oil testing and well completion and production at the same time.
Owner:CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1

A Method for Predicting Change Points of Seismic Data Sets

The invention discloses a seismic data set change point prediction method, which relates to the technical field of seismic data application in the exploration and development of oil and gas fields, a. high-resolution processing; b. fine horizon comparison; c. automatic fold recognition: calculating along the seismic horizon Take the formation curvature, find folds, and judge the positive or negative of the curvature at the same time; d. Judgment of the nature of the folds: judge whether it is an anticline or a syncline according to the positive and negative changes of the curvature; Amplitude difference; f. Calculation of micro-amplitude folds: comprehensively calculate micro-amplitude folds according to the three parameters of curvature sign, curvature, and amplitude difference; g. Prediction of casing change points: according to well trajectory coordinates, from micro-amplitude folds The position of the possible casing change point and its slight fold degree are picked from the quantitative data, and the slight fold amount is extracted along the trajectory of the horizontal well to obtain the prediction result of the casing change point. The accuracy and efficiency of the method for predicting casing change points of horizontal wells based on slight folds are significantly improved.
Owner:CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1

A method for identifying micro-amplitude folds in seismic data

The invention discloses a method for identifying micro-amplitude folds of seismic data, which relates to the technical field of seismic data processing for oil and gas field exploration and development. The steps are: a. High resolution processing: processing conventional lower resolution seismic data into high resolution data ;b. Fine horizon correlation: Accurately pick up seismic horizons according to the usual seismic horizon correlation technology; c. Automatic fold recognition: calculate formation curvature along seismic horizons, find folds, and judge the positive or negative of curvature at the same time; d, Folds Judgment of nature: judging whether it is an anticline or a syncline according to the positive and negative changes of curvature; e. Extracting amplitude difference: calculating the amplitude difference in each direction within the scope of the target layer with the center of the slight fold; f. Calculating the amount of slight fold: according to the positive and negative sign of the curvature , curvature size and amplitude difference value three parameters, comprehensively calculate the slight wrinkle amount. After adopting this method, the recognition accuracy is significantly improved, and the recognition efficiency is high.
Owner:CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1

A method for end-to-end detection and recognition of video text based on deep learning

The invention discloses a method for end-to-end detection and recognition of video text based on deep learning, and belongs to the technical field of video text processing. The steps of the present invention include: performing image size normalization processing on each video frame image for the video sequence segment to be identified, so that the preprocessed image size matches the input of the end-to-end word detection and recognition network; The preprocessed images are sequentially input to the end-to-end text detection and recognition network to obtain the text recognition results of the video sequence segment to be recognized. The invention realizes end-to-end detection and recognition of video characters, avoids inherent defects such as error accumulation caused by inconsistency of multi-module targets, and reduces engineering complexity. The network structure is also optimized through the shared feature extraction network. At the same time, since the feature map with a larger receptive field is used to input the recognition branch of the network, the feature map can contain a wider range of information than the input using the original image, which improves the performance of the network. recognition accuracy.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
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