21 results about "Multiple fractures" patented technology

The invention relates to a fatigue crack monitoring method and system based on a strip-type strain sensor, and the method comprises the steps: installing the strip-type strain sensor in a to-be-monitored fatigue crack region, and enabling the strip-type strain sensor to be provided with a plurality of resistance strain gauges which are sequentially connected to form a loop, and a fixed resistor which is connected to the loop, a multi-resistor composite network topology structure is formed; when monitoring is started, resistance change data of the strip type strain sensor are collected in real time; based on a finite-state machine model, analyzing a resistance strain gauge fracture mode of the strip type strain sensor according to the resistance change data; and according to the matching of the resistance change data and the position mapping graph of the fracture condition corresponding to the resistance strain gauge fracture mode, obtaining the positioning result of the fatigue crack position. Compared with the prior art, the method has the advantages of high sensitivity, strong discrimination, capability of realizing multi-fracture identification and accurate positioning and monitoring, and the like.

This invention discloses a method for identifying and modeling rock core fractures based on CT scan data, belonging to the field of fracture identification technology. The fracture identification method comprises extracting fracture point information from CT scan data based on CT numerical values; performing ellipsoid fitting on the three-dimensional fracture point information; clustering the fitted characteristic data to obtain multiple fracture clusters; and identifying rock core fractures based on the multiple fracture clusters. This invention improves data processing efficiency and enhances fracture identification accuracy.

A controlled rate of propagation of the fluid saturation front or thermal front is desired in may oil and gas and geothermal operations. Natural fractures and fractures created during hydraulic stimulation may have heterogeneous hydraulic properties resulting in uneven flow distributions, therefore leading to short-circuiting and breakthrough issues. The present invention relates to wellbores connected hydraulically by multiple fracture zones; methods are directed to control for even flow distribution among fractures, regardless of heterogeneities in fracture hydraulic properties, and to control propagation of saturation fronts and thermal fronts in subsurface reservoirs.

The invention discloses an optimization design method for multiple turning fracturing in a crack, which comprises the following steps: S1, designing a fracturing scale I of main crack fracturing, and carrying out sand fracturing on the main crack according to the fracturing scale I; s2, calculating the dosage of a temporary plugging agent required by steering of the first-stage branch crack, and injecting the temporary plugging agent according to the dosage of the temporary plugging agent to open the first-stage branch crack; s3, the crack initiation angle of the first-stage branch crack is calculated, and the second fracturing scale of the first-stage branch crack is designed according to the crack initiation angle; s4, prepad fluid is pumped and injected, and then sand fracturing of first-stage branch fractures is conducted according to the second fracturing scale; and S5, the steps S2-S4 are repeated, and sand fracturing of the second-stage branch fracture and the third-stage branch fracture is conducted in sequence. According to the method, the fracturing scale of the main fracture and the branch fractures can be optimized, and the flow conductivity and the final yield of the branch fractures are improved.

The application relates to the field of computer-aided medical technology, and discloses a rehabilitation plan recommendation method for multiple fractures, which comprises the following steps: acquiring a first image for representing multiple fractures, the first image being an image in which multiple fracture position bounding boxes are marked on a preset human skeleton image; determining position information of a concurrent injury position according to the first image; and performing rehabilitation plan recommendation according to the position information of the concurrent injury position. The image in which multiple fracture position bounding boxes are marked on the preset human skeleton image is acquired, then the position information of the concurrent injury position is determined according to the image, and thus the rehabilitation plan recommendation can be performed according to the position information of the concurrent injury position. In this way, the rehabilitation training plan can be recommended for the multiple fracture user. The application further discloses a rehabilitation plan recommendation device for multiple fractures, an electronic device and a storage medium.

This invention relates to a fatigue crack monitoring method and system based on a strip strain sensor. The method includes: installing a strip strain sensor on the area to be monitored for fatigue cracks. The strip strain sensor has multiple resistance strain gauges connected sequentially to form a loop, and a fixed resistor connected to the loop, forming a multi-resistor composite network topology; during monitoring, real-time acquisition of resistance change data from the strip strain sensor; based on a finite state machine model, analyzing the fracture modes of the resistance strain gauges in the strip strain sensor according to the resistance change data; and obtaining the location result of the fatigue crack by matching the location mapping diagram of the fracture conditions corresponding to the resistance change data and the fracture modes of the resistance strain gauges. Compared with the prior art, this invention has advantages such as high sensitivity, strong discrimination, and the ability to achieve multiple fracture identification and precise location monitoring.

The invention discloses a method for marking rib fracture for medical images, a computer program product and medical auxiliary diagnosis equipment. The method for marking rib fracture for the medical image comprises the following steps: S102, displaying a schematic diagram of ribs; s104, marking segments of ribs on the schematic diagram; and S106, reading the result of the artificial intelligence analysis of the medical image, and marking the rib fracture on the schematic diagram according to the result of the artificial intelligence analysis of the medical image. According to the method for marking the rib fracture for the medical image, the computer program product and the medical auxiliary diagnosis equipment, the rib fracture can be clearly and easily marked, and a doctor not only can intuitively see the positions of all the fractures, but also can intuitively distinguish the positions of multiple fractures and a single fracture. In addition, by means of the method, the film reading doctor can intuitively explain the illness state to the attending doctor, and the attending doctor can intuitively explain the illness state to the patient. In addition, the doctor can visually see the risk grade of the fracture.

The invention relates to the technical field of improvement of gas injection capacity of a horizontal well of a gas storage, in particular to a gas injection capacity optimization method of the horizontal well of the gas storage, which comprises the following steps: pretreatment before fracturing: removing pollutants in a near-wellbore zone and forming multiple cracks in the near-wellbore zone; hydraulic pulse fracturing is conducted, low-viscosity slickwater is injected into the horizontal well in a variable displacement pulse mode, so that multiple cracks are formed in the immediate vicinity of the wellbore, and shear slip cracks are generated; the crack opening perforation holes are blocked, and the multi-crack opening perforation holes formed in the near wellbore area are blocked; and the new cracks are fractured through circulating hydraulic pulse, new cracks are formed in the near wellbore area, and shear slip cracks are generated. According to the working method of pretreatment before fracturing, hydraulic pulse fracturing, crack opening perforation hole plugging and new crack circulating hydraulic pulse fracturing, by means of high-displacement instant super-fracture pressure, a stratum is pressed open, pump stopping and pressure relief are conducted, then displacement is rapidly increased to expand the crack, reciprocating oscillation is conducted, the crack is made to have shear slippage, and certain flow conductivity is obtained; and the gas injection capacity of the gas storage strong-production and strong-injection horizontal well is improved.

The present invention relates to the technical field of unconventional oil and gas development, and specifically to a system and method for simulating multiple rounds of gas-water alternating pressure-stealing injection-production recovery. This scheme equivalently simulates a fracturing network and a matrix reservoir, and reasonably considers the pressure-stealing injection-production during the well-stealing time, resulting in more accurate results. The fracture core clamping unit and the matrix core clamping unit are swapped in the forward and reverse directions to achieve rapid saturation of the dense core, shortening the reservoir initialization time. The core clamping unit does not need to be repeatedly disassembled and assembled, so the effects of multiple fracture parameters on the three-stage pressure-stealing recovery recovery can be considered. By changing the fracture morphology through replacing the fractured core, the influence of water-gas composite media under different storage and permeability modes on the pressure-stealing recovery capacity of the oil well can be studied. The different storage and permeability modes include multi-stage fracture-matrix reservoirs, large fracture-matrix reservoirs, micro-fracture-matrix reservoirs, and original matrix reservoirs. This ensures the independence and integrity of the fracture core and the matrix core, greatly shortening the experimental time.

Methods for augmenting mining operations with hydraulic fractures. The methods may comprise forming one or more hydraulic fractures near an ore body, which may be filled with an impermeable material, thereby forming an artificial aquitard or a barrier to contaminant migration. The methods may also comprise forming one or more hydraulic fractures within an ore body, injecting a proppant material into the fractures, and cycling a solution through the fractures to perform in-situ mining, or cycling a working fluid through the fractures to provide a mode of heat exchange. The methods may further comprise forming one or more hydraulic fractures at a site of interest to locally influence stress fields in order to prepare the site for material extraction, or disposing within the fractures an energetic material, and detonating the energetic material to extend a single fracture, to form multiple fractures, or to highly fragment rock.

The invention discloses a multi-cluster fracture propagation and proppant migration simulation method considering eyelet erosion. The method comprises the steps that parameters are set, a hydraulic fracturing geometric model is established, and the initial pressure fracture width is set; determining a current time step length; solving an eyelet erosion equation, an eyelet pressure drop equation, an in-seam fluid flow equation and a rock elastic deformation equation when the sand-carrying fluid is started to be pumped; solving a proppant migration equation when the sand-carrying fluid starts to be pumped at the current moment; updating the front edge and the elastic matrix of the crack of each cluster when the tip of the crack of each cluster reaches the critical expansion condition; and when the current moment reaches the total pumping time, ending calculation, and outputting a time-varying diagram of the hole diameter and the hole shape coefficient, a three-dimensional expansion form of each cluster of cracks and an in-crack propping agent distribution cloud diagram. According to the scheme, the expansion form of the multi-cluster fracture and the concentration distribution of the propping agent in the horizontal well segmented multi-cluster fracturing can be evaluated more accurately, and the unconventional oil and gas well fracturing parameter design is guided.

The invention relates to the technical field of oil field oil production engineering, in particular to a full-bore infinite fracturing sliding sleeve for a horizontal well, which comprises a switching mechanism and a plurality of actuating mechanisms, and the plurality of actuating mechanisms jointly form a channel for flowing of fracturing fluid; the actuating mechanism comprises an upper joint and a lower joint; the lower connector is provided with a first gap, and the first gap communicates with the channel. An inner cylinder is arranged on the inner side of the lower joint; a gap II is formed in the inner cylinder; under the action of the switching mechanism, the inner cylinder can slide in the axial direction and has a first position and a second position correspondingly before and after sliding, and when the inner cylinder is located at the first position, the second gap and the first gap are staggered in the axial direction; when the first opening and the second opening are located at the second position, the first opening and the second opening correspond to each other and communicate with each other, the inner barrel and the lower connector are in stop fit, well sections of the horizontal well are fractured conveniently, and after fracturing is completed, the switching mechanism can be automatically matched with different executing mechanisms through the special structures of the switching mechanism and the executing mechanisms; and the same well section of the horizontal well can be fractured for multiple times.

This invention relates to the field of medical device technology, specifically to a balloon device for minimally invasive reduction and fixation of intra-articular fractures. The device includes a cannula, within which an arthroscope slides and engages. A delivery tube for transporting the reduction balloon body also slides and engages within the cannula. The reduction balloon body includes a support balloon mechanism for transporting a support structure and a propulsion balloon mechanism for moving the fracture ends. The support balloon mechanism includes a clamping end and several movable ends. One end of the clamping end is detachably connected to the delivery tube, and a groove for placing the support structure is formed within the clamping end. The movable ends are fixedly connected to both sides of the clamping end. A base plate is fixedly connected within the groove, and several pressure sensors are fixedly connected to the base plate for measuring pressure data when the support structure contacts the fracture ends. The pressure sensors are electrically connected to a display panel for displaying the pressure data. This invention ensures accuracy during the docking of multiple fracture ends and improves the stability of the fixed fracture ends.

The present application relates to the technical field of oilfield production engineering, in particular to a full-bore unlimited-stage fracturing sliding sleeve for horizontal wells, comprising a switching mechanism and a plurality of execution mechanisms, which jointly constitute a channel for fracturing fluid flow; the execution mechanism comprises an upper joint and a lower joint; the lower joint is provided with a fracture one, which is in communication with the channel; the inner side of the lower joint is provided with an inner cylinder; the inner cylinder is provided with a fracture two; under the action of the switching mechanism, the inner cylinder can slide along the axial direction and has corresponding first and second positions before and after sliding; when in the first position, the fracture two and the fracture one are axially misaligned; when in the second position, the fracture one and the fracture two are in correspondence and communication, and the inner cylinder and the lower joint form a stop cooperation, which facilitates the fracturing of the well section of the horizontal well; after the fracturing is completed, the special structure of the switching mechanism and the execution mechanism enables the switching mechanism to automatically adapt to different execution mechanisms and to perform multiple fracturing on the same well section of the horizontal well.

This application relates to the field of solid oxide fuel cell technology and provides a method and apparatus for testing the flexural strength of solid oxide fuel cells (SOFCs). The method includes: generating a particle model of porous ceramic SOFC using the discrete element method (DEM); setting bonding connections between particles in the particle model; calculating the solid bond transmission force between particles after bonding, and calculating the initial value of the micro-stiffness corresponding to the elastic parameters using mean-field theory; performing uniaxial tensile discrete element model simulation based on the initial value of micro-stiffness, and adjusting the micro-stiffness according to the difference between the test results and the target elastic parameters; establishing a double-ring bending discrete element model based on the particle model, simulating multiple fracture processes based on the adjusted micro-stiffness and the double-ring bending discrete element model, and statistically analyzing the results of multiple fractures using the Weibull distribution to predict the flexural strength of SOFC samples of the target size. Generating a particle model based on DEM and performing double-ring fracture simulation improves the versatility of flexural strength testing and reduces testing costs.

This invention discloses a method and apparatus for optimizing horizontal well volumetric fracturing technology. The method includes: determining the fracture density demand index through core flow experiments; establishing a three-dimensional stress field model of the target reservoir and determining the fracture equilibrium propagation simulation index based on the three-dimensional stress field model; determining the fracture equilibrium propagation monitoring index based on the perforation diameter enlargement data and fiber optic signal intensity data of multiple fracture clusters in the target reservoir; determining the multi-cluster fracture equilibrium propagation capability index based on the fracture equilibrium propagation simulation index and the fracture equilibrium propagation monitoring index; and determining the horizontal well volumetric fracturing technology for the target reservoir based on the fracture density demand index and the multi-cluster fracture equilibrium propagation capability index. This invention can improve the fracturing effect and the efficiency of fracturing parameter determination, and optimize the horizontal well volumetric fracturing technology for different types of reservoirs.

This invention relates to the field of oil and gas exploration and development, and discloses a method, apparatus, equipment, and medium for determining the area of ​​fracture current anomalies. It can generate conductivity imaging data and trajectory curve expressions for multiple fractures based on raw electrical imaging logging data from fractured oil and gas reservoirs. The conductivity imaging data and each trajectory curve expression are mapped to a predetermined three-dimensional coordinate system to generate a fracture trajectory curve corresponding to each trajectory curve expression and multiple discrete data points corresponding to the conductivity imaging data in the three-dimensional coordinate system. The three-dimensional coordinate system includes a depth axis, a wellbore expansion direction axis, and a conductivity axis. The background conductivity of the three-dimensional coordinate system is determined based on each discrete data point. Based on the background conductivity and each fracture trajectory curve, the current anomaly area of ​​each fracture is determined. This invention can effectively determine the area of ​​fracture current anomalies, enriching the methods for determining fracture current anomalies.

The invention discloses an ultra-deep ultra-high temperature carbonate rock reservoir communication multi-fracture-cavity reconstruction method and application, and the method comprises the steps: selecting at least three to-be-communicated fracture-cavity bodies within a first preset distance in a first horizontal principal stress direction of a target carbonate rock reservoir based on a three-dimensional geophysical prospecting earthquake and geological interpretation result, well spacing is conducted at a second preset distance in the second horizontal principal stress direction of the target carbonate rock reservoir; high-viscosity fracturing fluid is pumped through a large-displacement gel fracturing technology to communicate with the middle fracture-cavity body, and after an artificial fracture between the arranged vertical well and the middle fracture-cavity body is generated, a proppant is pumped to support the artificial fracture; after the pump is stopped for preset time, temperature-control variable-viscosity fracturing fluid is pumped and injected, so that the temperature-control variable-viscosity fracturing fluid temporarily plugs the artificial crack at the set position, and crack initiation is conducted at a stress weak point between the shaft and the temporary plugging point; and continuously pumping sand-containing gel fracturing fluid with a large displacement, and fracturing the turned artificial crack at the crack initiation point to communicate with the rest to-be-communicated fracture-cavity bodies.

The utility model discloses an audience participated orthopedic reduction demonstration frame, which relates to the technical field of orthopedic reduction robot demonstration and comprises a shielding bracket, a display frame, a display frame and a display frame, and the top of the shielding bracket is provided with at least two view windows; the shielding plate is movably arranged on the shielding bracket, and when the shielding plate is moved to a certain position, only one window on the shielding bracket is in an open state; the reduction demonstration frame is placed at a fracture affected part, and a plurality of fracture positions can be displayed to a reduction operator one by one by moving the baffle plate, so that after the reduction operator carries out reduction operation, compared with the reduction process of an orthopedic reduction robot, the reduction operator can experience that the robot can give consideration to the reduction of a plurality of fractures at the same time; and the audience can quickly experience the advancement of the orthopedic reduction robot.

The invention discloses a multi-degree-of-freedom fracture reduction robot suitable for multiple fracture scenes, and belongs to the field of medical instruments. The base horizontal displacement mechanism is mounted on the main body lifting mechanism; the affected side kirschner wire clamping mechanism and the uninjured side kirschner wire clamping mechanism are both installed on the base horizontal displacement mechanism. The number of the universal wheels is four, the four universal wheels are all fixed to the lower end of the main body lifting mechanism, the base horizontal displacement mechanism is installed on the main body lifting mechanism, and the affected side kirschner wire clamping mechanism and the uninjured side kirschner wire clamping mechanism are both installed on the base horizontal displacement mechanism. According to the multi-degree-of-freedom, high-precision and high-stability mechanical structure design, a user-friendly operation interface and a flexible structural layout are combined, a safe, precise and efficient robot auxiliary solution is provided for a complex fracture reduction operation, and the multi-degree-of-freedom, high-precision and high-efficiency robot has remarkable clinical practical value and technical popularization prospects.

The utility model provides a humerus greater tubercle porous easily-shaped hook plate which comprises an easily-shaped hook plate body, the easily-shaped hook plate body comprises a locking ring and an adjusting rod, and the locking ring comprises an upper end locking ring and a lower end locking ring; the adjusting rods comprise transverse adjusting rods and longitudinal adjusting rods, the upper-end locking rings and the lower-end locking rings are arranged side by side up and down, the adjacent upper-end locking rings are connected through the transverse adjusting rods, the adjacent lower-end locking rings are connected through the transverse adjusting rods, and the upper-end locking rings are connected with the corresponding lower-end locking rings through the longitudinal adjusting rods; a plurality of universal nails, wherein each universal nail is matched with the locking hole in the locking ring; and each small hook plate comprises a connecting plate and a tip end, an included angle is formed between the connecting plate and the tip end, and each small hook plate is arranged in the middle of the upper end of the easy-to-shape hook plate body. According to the utility model, complex fractures such as multi-fracture blocks of greater tuberosity of humerus, comminuted fracture and the like can be effectively and accurately fixed; and the anatomical form of the greater tuberosity of the humerus can be more tightly fitted.