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936 results about "Open hole" patented technology
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Ground surface directional drilling high-pressure deep hole grouting construction method based on steel sleeve hole fixing
The invention discloses an earth surface directional drilling high-pressure deep hole grouting construction method based on steel sleeve hole fixing. The earth surface directional drilling high-pressure deep hole grouting construction method comprises the following steps that firstly, a directional drilling machine is used for vertically drilling a grouting hole downwards; secondly, a plurality of steel floral tubes are sequentially put down in the three-opening first branch grouting hole; thirdly, cement-bentonite-based sleeve shell materials are continuously injected into the first section of the steel floral tube to the inner bottom of a first branch grouting hole of the three-opening hole, and an annular space between the first branch grouting hole of the three-opening hole and the steel floral tube string is filled with the cement-bentonite-based sleeve shell materials; fourthly, a packer is lowered to the bottom of the three-opening first branch grouting hole; a packing section is formed in front of the packer; and fifthly, cement grout is injected into the grouting pipe, grouting is conducted on the packing section, the finally-set cement-bentonite-based casing material is split and damaged under the effect of grouting pressure, and the grouting grout is injected into the stratum to be reinforced through the grout channel. According to the method, the hole collapse phenomenon when the grouting hole penetrates through the unfavorable geological section can be prevented, the grouting stopping effect of the packer is guaranteed, and retreating type segmented grouting construction is guaranteed.
Owner:CHINA RAILWAY TUNNEL GROUP CO LTD +1
Vibration damping device for a head up display driving module
A vibration damping device for a head-up display driving module, the device comprising: a power generating unit configured to a first damper having a predetermined thickness based on a shape corresponding to a motor mount to which a motor is fixed and a second damper fitted into an open hole of a damper mount disposed on top of the motor mount; and a power transmission unit configured to transmit power of the motor by rotating a lead screw extended and coupled to a rotating shaft of the motor.
Owner:HYUNDAI MOBIS CO LTD
Battery assembly and photovoltaic system
The invention is suitable for the technical field of solar cells, and provides a cell module and a photovoltaic system, and the cell module comprises a back contact cell which comprises a first polarity grid line and a second polarity grid line; the plurality of first welding strips and the plurality of second welding strips are respectively connected with the first polarity grid line and the second polarity grid line; the insulating strip is arranged on the sides, deviating from the back contact battery, of the first welding strip and the second welding strip, and the insulating strip comprises a through hole; the bus bar is arranged on the side, away from the back contact battery, of the insulating strip, the bus bar is electrically isolated from the first welding strip through the insulating strip, and the bus bar is electrically connected with the second welding strip through the through hole; wherein the insulating strip is a flexible insulating strip and comprises an open hole part and a non-open hole part, the through hole is located in the open hole part, and the thickness of the open hole part is larger than that of the non-open hole part. According to the flexible insulating strip, the thicker opening part is arranged in the flexible insulating strip, so that a buffering effect is achieved during welding and subsequent lamination, and the risk of subfissure and fragment is reduced.
Owner:ZHUHAI FUSHAN AIKO SOLAR ENERGY TECH CO LTD
Natural ventilation cooling tower and lattice type concrete filled steel tube cross strut thereof
The invention discloses a natural draft cooling tower and a lattice type concrete filled steel tube cross strut thereof, the lattice type concrete filled steel tube cross strut comprises four lattice columns and cross nodes, the end parts of the lattice columns are on the same plane and are connected with the cross nodes to form an X-shaped structure, and each lattice column comprises a concrete filled steel tube column limb and a web member for connecting the adjacent concrete filled steel tube column limbs; the cross joint comprises two joint branch assemblies and a joint belly assembly connected with the two joint branch assemblies, and each joint branch assembly comprises a joint panel, a first covering panel and a second covering panel, wherein the first covering panel and the second covering panel cover the joint panel. The joint face plate comprises a joint top plate, a joint bottom plate, a joint stiffening plate and a reinforcing ring plate, the joint stiffening plate and the reinforcing ring plate are arranged between the joint top plate and the joint bottom plate, and open holes are formed in the joint top plate, the joint bottom plate and the reinforcing ring plate and used for concrete pouring and circulation. And the four latticed columns are arranged at the holes of the node top plates and the node bottom plates of the two node branch assemblies. The use amount of strut steel and concrete is reduced, and the construction speed and the construction quality are improved.
Owner:查晓雄
Micro-mixing nozzle integrating cooling and heat regeneration of heat pipe and combustor
The invention discloses a micro-mixing nozzle integrating heat pipe cooling and heat regeneration and a combustor, the micro-mixing nozzle comprises a heat pipe assembly I, a micro-mixing sleeve, an air mixing module and a fuel pipe, the micro-mixing sleeve, the air mixing module and the fuel pipe are coaxially arranged, and the heat pipe assembly I comprises a heat conduction ring, perforated fins, a heat pipe and heat pipe radiating fins; the overall combustor comprises a fuel cavity, an air cavity and a cooling cavity which are sequentially, coaxially and fixedly arranged at intervals from bottom to top, and a plurality of micro-mixing nozzles which are symmetrically arranged relative to the center of the overall geometric central axis are installed in the air cavity and the cooling cavity. According to the micro-mixing nozzle integrating cooling and backheating of the heat pipe and the combustor, the inlet area of the combustion chamber can be rapidly cooled, the service life of the combustor is prolonged, meanwhile, heat of the inlet area of the combustion chamber can be effectively utilized to preheat air, and the combustion efficiency is improved. The problem that the service life of an existing combustor is short due to thermal damage of a high-temperature backflow area to a micro-mixing nozzle can be solved.
Owner:CHINA UNIV OF MINING & TECH
Diagenesis prediction based on thin section image analysis and open-hole logs
Systems and methods for determining a diagenesis level in a reservoir for performing hydrocarbon extraction include receiving a set of open hole (OH) log data from one or more wells in the reservoir, the OH log data representing a subsurface of the reservoir; executing a diagenesis model to process the set of OH log data, the diagenesis model trained by thin-section image data correlated to labeled OH log data, the labeling identifying values for a quartz overgrowth rate (QOR), a clay coating rate (CCR), or a thin-section porosity in the subsurface based on a value in the OH log data; determining a prediction of a porosity of the reservoir, a permeability of the reservoir, or both the porosity and the permeability; and generating a control signal representing a recommendation to drill a well at a location in the reservoir.
Owner:SAUDI ARABIAN OIL CO
Machining device for turbine shaft of turbocharger
PendingCN121733309ARevolution surface grinding machinesInternal combustion piston enginesTurbochargerStructural engineering
The invention relates to the technical field of turbine shaft machining, and discloses a turbocharger turbine shaft machining device which comprises a machining bin and further comprises a visual door plate installed at an open hole formed in the front face of the machining bin and used for opening and closing the visual door plate and taking and placing the turbine shaft. The machining table is fixedly connected to the interior of the machining bin and used for machining the turbine shaft; the clamping mechanism is arranged above the machining table and used for clamping the turbine shaft; and the moving mechanism is arranged above the processing table. By arranging the clamping mechanism and adopting the scheme that a conical groove pushes a plurality of sets of push rods and clamping blocks to synchronously and radially move, high-precision automatic centering of the turbine shaft is achieved, it is guaranteed that the rotation center of a workpiece and the machining center strictly coincide, the machining roundness is guaranteed from the source, meanwhile, a first spring provides uniform clamping force, and the machining precision is improved. And deformation or surface damage of the thin-wall part possibly caused by a traditional rigid clamp is avoided, and rigid-flexible precise clamping is achieved.
Owner:YANGZHOU HENGDALI POWER CO LTD
Self-drilling anti-floating anchor rod drilling tool structure with self-adaptive positioner and construction method
The invention discloses a self-drilling anti-floating anchor drilling tool structure with a self-adaptive positioner and a construction method, solves the problem that in the prior art, the forming quality is affected by structural arrangement in the drilling process of an anti-floating anchor, and has the beneficial effects that wall protection and muck removal are achieved, grouting can be achieved, and centering positioning is kept in the grouting process. According to the specific scheme, the self-drilling anti-floating anchor rod drilling tool structure with the self-adaptive positioner comprises a pile casing, one end of the pile casing can be connected with a drilling machine, a front-end drill crown is detachably arranged at the other end of the pile casing, open holes are formed in the side wall of the pile casing, spiral blades are annularly arranged on the pile casing, and a plurality of anchor rod steel bars are arranged in the pile casing; one end of each anchor rod steel bar abuts against the front-end drill crown, the other end of each anchor rod steel bar is arranged to exceed the pile casing, the self-adaptive positioners are arranged in the length direction of the anchor rod steel bars at set intervals, the self-adaptive positioners are located in the pile casing, the self-adaptive positioners are arranged on the peripheral sides of the anchor rod steel bars, and the self-adaptive positioners are fixedly connected with the anchor rod steel bars.
Owner:QINGDAO UNIV OF TECH
Construction method for slim-hole drilling cavity detection and injection and production well transformation of salt cavern reservoir
The invention discloses a construction method for salt cavern slim hole drilling cavity detection and injection and production well transformation. The construction method mainly comprises the six steps of cavity detection operation, packing operation, conduit operation, first-time reaming and well cementation, second-time reaming and well cementation and third-time open hole cavity penetrating operation. Compared with the prior art, the construction method for detecting the salt cavern slim-hole drilling cavity and transforming the injection and production well has the advantages that the drilling cost input is reduced, the working period is shortened, meanwhile, deflection and borehole wall instability are effectively avoided, and the construction safety is improved.
Owner:CHINA COAL GEOLOGY GRP CO LTD +1
Rubber sleeve with large reaming rate
The invention relates to the technical field of open hole packers, and discloses a large-reaming-rate rubber sleeve which comprises a central pipe and further comprises a rubber sleeve body, a first sleeve and a second sleeve, and the rubber sleeve body is of a single integrated structure and arranged on the outer side of the central pipe in a sleeving mode; the two shroud rings are respectively fixed at the axial interval positions of the outer surface of the rubber sleeve, and the two shroud rings form a restraining and separating effect on the rubber sleeve, so that the rubber sleeve forms continuously distributed sealing bulges in the three sealing sections in the setting process; the back ring is arranged at the axial end of the rubber sleeve and matched with the rubber sleeve, a plurality of gap holes are distributed in the surface of the back ring, and the back ring synchronously and radially expands along with the rubber sleeve in the setting process and is adaptively attached to the open hole well wall through deformation of the gap holes, so that a stable supporting face is constructed for the rubber sleeve. The rubber sleeve with the large reaming rate aims at solving the problems that in the prior art, under the large reaming well condition, a rubber sleeve is insufficient in sealing capacity, lacks multiple sealing structures and is prone to being damaged in the tripping-in process.
Owner:JINGZHOU SAIRUI ENERGY TECH CO LTD
Metal insert and connector
The utility model provides a metal insert which is applied to a plastic shell of a connector, an inner hole of the metal insert is not provided with threads, and the metal insert is suitable for being embedded in an open hole of the plastic shell of the connector. The utility model also provides a connector, wherein the metal insert is embedded in the opening of the plastic shell of the connector.
Owner:TYCO ELECTRONICS (SUZHOU) CO LTD +1
Systems and methods for monitoring storage sites
PendingUS20250346430A1Detection of fluid at leakage pointConstructionsMining engineeringMonitoring system
A monitoring system for monitoring a geological formation includes a casing of an injection well, wherein the casing is configured to extend through an open hole of the geological formation to define an annular space between the casing and the open hole, and wherein the casing includes a mandrel circumscribing at least a portion of the casing, and one or more monitoring lines configured to monitor the geological formation for the presence of carbon dioxide, wherein the one or more monitoring lines are at least partially integrated with the mandrel.
Owner:SCHLUMBERGER TECH CORP
Preparation method of 3D printing composite material
The invention provides a preparation method of a 3D printing composite material, which comprises the following steps: S10, providing a 3D printing skeleton which is printed by adopting a first thermoplastic material and has a three-dimensional communicated open pore structure, and reserving a layer grain structure formed in the printing process on the surface of the 3D printing skeleton; s20, the 3D printing framework is placed in a constant-temperature environment of 70-90 DEG C and kept dry; s30, the heated 3D printing framework is moved into a cavity of an injection mold, the mold is closed, and the temperature of the cavity of the injection mold is set to be 30-60 DEG C; s40, a molten second thermoplastic material is injected into the cavity, so that the second thermoplastic material wraps the 3D printing framework and fills the groove of the layer grain structure; the shore hardness of the second thermoplastic material is lower than that of the first thermoplastic material, and the softening temperature of the first thermoplastic material is higher than the melt injection temperature of the second thermoplastic material. According to the 3D printing composite material prepared by the preparation method, the problem that the comfort degree of an existing 3D printing insole is relatively low can be solved.
Owner:ANTA (CHINA) CO LTD
Open hole packer capable of preventing obstruction
The invention relates to the technical field of oil and gas well completion tools, and discloses an anti-resistance open hole packer which comprises a central pipe and a rubber sleeve arranged outside the central pipe in a sleeving mode, and further comprises a double-piston setting mechanism arranged on the central pipe in a sleeving mode and defining a pressure-bearing cavity, one end of the double-piston setting mechanism abuts against the end of the rubber sleeve, and the other end of the double-piston setting mechanism abuts against the end of the rubber sleeve. Axial thrust is generated by receiving high-pressure liquid conducted in the center pipe, and the rubber barrel is extruded to deform in the radial direction and be attached to the open hole well wall. And the lower piston assembly is arranged in a pressure-bearing cavity between the central pipe and the double-piston setting mechanism, firstly moves in the direction far away from the rubber barrel under the action of high-pressure liquid, relieves the pre-locking state of the double-piston setting mechanism and then drives the double-piston setting mechanism to move in the direction of the rubber barrel. The open hole packer capable of preventing resistance encountering aims at solving the problems that a setting mechanism is started in advance and set accidentally due to resistance encountering in the process that an existing open hole packer goes into a well, and the existing open hole packer cannot reach a preset packing position accurately.
Owner:JINGZHOU SAIRUI ENERGY TECH CO LTD
Grinding apparatus
A grinding apparatus has a grinding wheel fastened to a mount disk connected a spindle by a plurality of bolts. The mount disk has at least three threaded holes and a plurality of protrusions protruding from a mount surface thereof. Each of the bolts includes an externally threaded shank, a neck coupled to the externally threaded shank, and an engaging flange coupled to the neck and extending radially outwardly. The grinding wheel includes an annular open hole defined in a mating surface of an annular base for mating with the mount surface, an annular slot that is wider than the annular open hole and is fluidly connected to the annular open hole, at least three insertion holes in the annular open hole for allowing the engaging flange to be inserted into the annular slot, and a plurality of protrusion insertion holes for receiving the engaging flanges of the bolts.
Owner:DISCO CORP
Battery pack assembly and vehicle
The invention provides a battery pack assembly and a vehicle. According to one embodiment of the invention, the battery pack assembly comprises a shell with an accommodating cavity; the partition plate is located in the containing cavity and divides the containing cavity into a battery bin and a smoke discharging bin, and the partition plate is provided with a smoke discharging opening communicated with the smoke discharging bin; the battery cell is arranged in the battery compartment, and the battery cell is provided with an anti-explosion valve; the insulating part is located between the battery cell and the partition plate, the insulating part is provided with an open hole, and the open hole is communicated with the anti-explosion valve and the smoke outlet; wherein the partition plate is fixedly connected with the insulating part through an adhesive, and is fixedly connected with the battery cell through the insulating part. The scheme can meet the insulation requirement of the battery cell and the partition plate as much as possible.
Owner:ZHEJIANG ZEEKR INTELLIGENT TECH CO LTD +2
Electromagnetic wave mode-while-drilling conversion relay transmission method and system
The invention relates to the technical field of underground measurement-while-drilling data transmission, in particular to an electromagnetic wave mode-while-drilling conversion relay transmission method and system. The method comprises the following steps: acquiring measurement data and transmitting a signal through a double-insulation controlled dipole transmitting structure; receiving the measurement data signal through a repeater arranged along the drill string; determining an equivalent emission impedance characteristic by outputting a detection signal to an external medium and collecting an output end voltage and a current effective value; receiving a propagable guidance response formed by the measurement data signal; judging the type of the current well section based on the equivalent emission impedance characteristic and the propagable guide response; switching to a casing guide injection path or an open hole coupling injection path is selected according to the type of the well section; and carrying out relay forwarding on the signal based on the corresponding emission parameter group. Intelligent identification and conversion of signal modes are achieved, the relay transmission success rate and stability of cased well measurement data signals are improved, the link building distance is shortened, and power consumption and risks caused by working condition uncertainty are reduced.
Owner:DAQING DRILLING ENGINEERING CO LTD +1
Friction prediction method and device
The invention discloses a friction resistance prediction method and device. The method comprises the following steps: acquiring drilling data of a measuring point contained in a target open hole well section; measuring point parameters corresponding to the measuring points are determined on the basis of the well drilling data, and the measuring point parameters comprise well diameter concave-convex degree parameters, well hole curvature parameters and well hole clearance ratio parameters; determining a borehole roughness value corresponding to the measuring point according to the measuring point parameter; according to the borehole roughness value and a preset correction mechanical model, the basic friction resistance value corresponding to the measuring point is determined, and the correction mechanical model is obtained by correcting a conventional mechanical model with the roughness degree corresponding to the irregular borehole as an influence factor; and according to the borehole roughness value and the basic friction resistance value, the comprehensive friction resistance value corresponding to the measuring point is determined. According to the invention, the accuracy of friction prediction can be improved.
Owner:PETROCHINA CO LTD +1
Underground grouting and drilling construction method for overlying strata separation layer grouting and filling mining and grouting system
The invention relates to the technical field of coal mine overlying strata separation layer grouting and filling mining, and particularly discloses an overlying strata separation layer grouting and filling mining underground grouting drilling construction method and a grouting system.The grouting system comprises a ground slurrying system, a slurry conveying drilling hole, an underground grouting pool, a high-pressure plunger pump, a directional drilling structure and a grouting pressure control system; slurry is prepared on the ground surface, and the slurry is pumped to an underground grouting pool through a slurry conveying drill hole; a high-pressure plunger pump is used for injecting slurry into the overlying strata separation layer through a directional drilling structure; the construction of the underground directional grouting drilling is carried out before the working face is mined, the track of the underground directional grouting drilling comprises a trepanning linear section, a pitching-up section, a linear section, a pitching-down section and an open hole section which are connected in sequence, upward penetrating and downward penetrating of a grouting key layer bottom plate are achieved, and a final hole is located below the key layer bottom plate by 5 m. The problem that ground drilling construction cannot be carried out under the complex terrain is solved, and the method has the advantages of being low in investment, high in efficiency and capable of releasing pressing and covering coal resources.
Owner:SHANXI WENLONG COAL MINE ENG DESIGN
Device and method for measuring lightning magnetic field shielding performance of Helmholtz coil material
The invention discloses a Helmholtz coil material lightning magnetic field shielding performance measuring device, which comprises a magnetic field generation device, a shielding test box is arranged in a magnetic field coverage range of the magnetic field generation device, an open hole is formed in the shielding test box, and the open hole enables a magnetic line of force of the magnetic field generation device to transversely penetrate through the shielding test box. The shielding test box is internally provided with the signal measurement unit, the signal measurement unit measures the magnetic field in the shielding test box, the lightning stroke magnetic field environment is accurately simulated, and the repeatability and accuracy of the shielding performance test are improved. The invention further discloses a method for measuring the lightning magnetic field shielding performance of the Helmholtz coil material, the lightning magnetic field shielding performance of the measured shielding material is measured by applying the device for measuring the lightning magnetic field shielding performance of the Helmholtz coil material, and the problem that traditional measurement is poor in accuracy is effectively solved.
Owner:XIAN AIRBORNE ELECTROMAGNETIC TECH
Wafer bearing structure and etching device for sconi etching process
The utility model provides a wafer bearing structure and an etching device used for the sconi etching process, the wafer bearing structure comprises a pedestal, a top disc and a thimble, the top disc is stacked on the pedestal, the pedestal is provided with a plurality of first open holes close to the edge, the top disc is provided with a plurality of second open holes close to the edge, the first open holes and the second open holes are coaxially arranged, and the thimble is arranged on the pedestal. The ejector pin can move in the axial direction of the first open hole and the second open hole so as to enable a wafer located on the ejector disc to ascend or descend, and the upper side, corresponding to the first open hole, of the base is provided with a first heating element, and when the wafer bearing structure is applied to the sconi etching process, the first heating element is arranged on the upper side, corresponding to the first open hole, of the base; the wafer is located on the top tray, and the first heating element can perform temperature compensation on the second opening area of the top tray, so that the etching reaction rate of the wafer is improved, the etching thickness difference between the center of the wafer and the corresponding second opening area of the top tray is balanced, and the uniformity of a sconi etching process is improved.
Owner:SIEN (QINGDAO) INTEGRATED CIRCUITS CO LTD
Rapidly-assembled vibration leveling device for road construction
The utility model discloses a road construction fast-assembly type vibration flattening device in the technical field of road construction equipment, which comprises a connecting rod vibration mechanism and a supporting flat plate, a first supporting plate and a second supporting plate are fixedly mounted at the upper end of the supporting flat plate, and the second supporting plate is positioned on the outer side of the first supporting plate. A transmission shaft is movably and fixedly installed between the first supporting plate and the second supporting plate, open holes are formed in the connecting positions of the first supporting plate and the transmission shaft and the connecting positions of the second supporting plate and the transmission shaft, and a first variable-speed large gear, a fixed gear and a second variable-speed large gear are installed on one side of the transmission shaft. The variable-speed large gear and the fixed gear are combined through the sliding gear ring, the effect of adjusting the rotating speed of the transmission shaft is achieved, the eccentric shaft is connected through the gear-shaped hole in the side end of the transmission shaft, the vibration amplitude of the vibration plate can be increased through rotation of the eccentric block of the eccentric shaft, and the adjusting effect of the movement angle is enhanced. The vibration plate is more tightly attached to a construction road, and the vibration plate can adapt to various construction environments conveniently.
Owner:POWERCHINA WATER ENVIRONMENT GOVERANCE
Machine tool machining precision real-time monitoring device
The utility model belongs to the technical field of machine tool machining, and particularly relates to a machine tool machining precision real-time monitoring device which comprises a laser interferometer body. A sleeve is arranged on the side wall of the laser interferometer body; an opening is formed in the side wall of the sleeve; the side wall of the opening is fixedly connected with a transparent plate; when external airflow blows air to the laser interferometer body, part of airflow passes through the plurality of vent holes to enter the sleeve, so that the airflow is uniformly distributed, the airflow is guided by the inclined surface of the guide plate, and then the airflow is exhausted to the outside through the air outlet holes after passing through the arc-shaped plate. According to the laser interferometer body, air entering the sleeve can flow uniformly and stably, disturbance of the air flow to laser is reduced, the precision of the laser interferometer body during workpiece monitoring is improved, and the using effect of the laser interferometer body is improved.
Owner:GUANGZHOU XUANDE TECHNOLOGY SERVICE CO LTD
Electric heating leg sleeve for lithotomy position operation
ActiveCN223995046UTherapeutic coolingTherapeutic heatingPhysical medicine and rehabilitationPhysical therapy
The utility model belongs to the technical field of medical instruments, and particularly relates to an electric heating leg sleeve for lithotomy position surgery, which comprises a first electric heating leg sleeve and a second electric heating leg sleeve, the bottom end of the first electric heating leg sleeve is connected with a first leg support in a bonding manner, and the bottom end of the second electric heating leg sleeve is connected with a second leg support in a bonding manner; a rotating shaft is fixedly connected between the bottom of the front end of the first leg support and the bottom of the rear end of the second leg support, a support is fixedly connected to the front end of the bottom of the first leg support, a supporting sleeve is fixedly connected to the rear end of the bottom of the second leg support, a plurality of limiting through holes are formed in the support, and an open hole is formed in the bottom of the rear end of the supporting sleeve. According to the leg support, the first leg support with the support and the second leg support with the limiting shaft are additionally arranged, so that the legs can be further positioned and supported in an auxiliary mode, and the leg support is simple, convenient to use and better in use.
Owner:THE THIRD AFFILIATED HOSPITAL OF XINJIANG MEDICAL UNIV
In-situ measurement method and device for heat conductivity of underground natural gas hydrate reservoir
The invention discloses an underground natural gas hydrate reservoir thermal conductivity in-situ measurement method and device, a thermal conductivity detector is arranged in a seabed open hole well, a sea surface control instruction is downloaded and test data is uploaded through pressure-resistant watertight cable carrier communication, and a driving motor, a speed reducer and a screw sleeve and screw rod transmission combined mechanism are adopted to realize in-situ measurement of the thermal conductivity of an underground natural gas hydrate reservoir. Lifting / lowering a convex disc on the central supporting rod, extruding / loosening a convex sliding block on the measuring probe, and inserting / extracting the measuring probe into / out of the reservoir around the well; the method comprises the following steps: heating a surrounding stratum through a plurality of heating probes and temperature probes which are spirally arranged in a layered manner, measuring the temperature change of the stratum, and calculating the thermal conductivity of the reservoir at different test points by adopting a corrected transient hot-wire method. The method can be used for in-situ determination of seabed natural gas hydrate reservoir thermal conductivity, is applied to natural gas hydrate resource evaluation and exploitation scheme design, and is simple and convenient to operate and accurate in test.
Owner:GUANGZHOU INST OF ENERGY CONVERSION CHINESE ACAD OF SCI
Open hole plugging well completion device for complex well
The invention relates to the technical field of oil and gas exploitation, and discloses a complex well open hole plugging well completion device which comprises a casing pipe, an end socket in threaded connection with the top of the casing pipe, an end socket in threaded connection with the bottom of the casing pipe and an annular sinking groove formed in the side wall of the casing pipe. A rubber sleeve is fixedly arranged at the position, located at the annular sinking groove, of the side wall of the sleeve, a first feeding opening is formed in the position, located below the annular sinking groove, of the inner wall of the sleeve, a pipe groove is formed in the side wall of the sleeve, and the two ends of the pipe groove communicate with the annular sinking groove and the first feeding opening correspondingly; a supporting frame is arranged on the inner wall of the sleeve, a first pressure spring is fixedly connected to the top of the supporting frame, and a movable sleeve is fixed to the tail end of the first pressure spring. The stress limit of the pin shaft and the stress of the connecting sleeve are dynamically calculated through the pump pressure real-time adjusting system, precise closed-loop control of the pump pressure is achieved in combination with a temperature compensation model and pressure drop loss compensation, and the problems of pin failure and pressure overshoot caused by temperature change of a traditional device are solved.
Owner:DONGYING DAMING PETROLEUM ENG TECH DEV
Integrated circulator, lead screw assembly and actuator
The utility model provides an integrated circulator, a lead screw assembly and an actuator. A return roller path penetrating through the integrated circulator is arranged in the integrated circulator, and open holes in the two ends of the return roller path correspond to two adjacent channels in the lead screw respectively; the upper surface of the integrated circulator is an arc surface, and ball return shovels are arranged on the upper surface of the integrated circulator corresponding to the holes in the two ends of the return raceway respectively and used for guiding balls to enter and exit from the return raceway. By means of the integrated circulator, circulation of the balls on the lead screw can be achieved, and the machining difficulty and cost can be reduced.
Owner:JIANGSU HENGLI PRECISION IND CO LTD +1
Coordination structure for binding arrangement and structural reinforcement of ship cargo hold
PendingCN121224920APreventing unwanted cargo movementHull framesClassical mechanicsStructural engineering
Owner:SHANGHAI SIDARUI SHIP MARINE ENG SERVICE CO LTD
High-strength prestressed solid square pile structure
The utility model relates to the technical field of solid square pile structures, in particular to a high-strength prestress solid square pile structure which comprises a square pile outer base body, square pile side base bodies and positioning plates, the square pile side base bodies are arranged on the two sides of the square pile outer base body, and the positioning plates are arranged in the square pile outer base body. An inner groove is formed in the middle of the positioning plate, an inner anti-deformation rod is arranged on the inner side of the inner groove in a surrounding mode, open hole grooves for ribs are formed in the periphery of the positioning plate, reinforcing ribs are arranged on the inner sides of the open hole grooves for the ribs in a penetrating mode, and protruding parts are arranged on the surfaces of the two sides of the positioning plate. A steel wire bundle assembly is arranged at the joint of each group of positioning plates and the reinforcing ribs on the periphery; the solid square pile solves the problems that in the prior art, a solid square pile is one of concrete precast piles which is applied to an engineering foundation earlier, but an existing solid square pile is not high enough in bearing capacity, poor in bending resistance and prone to deformation, and meanwhile the solid square pile is prone to cracking.
Owner:SUQIAN HUAMEI NEW MATERIALS CO LTD
Construction method for quickly opening small-caliber hole in reinforced concrete enclosure structure based on pipe jacking method
The invention relates to the technical field of municipal engineering, in particular to a construction method for quickly forming a small-caliber hole in a reinforced concrete retaining structure based on a pipe jacking method, which comprises the steps of processing a steel water tank, combining and processing a reinforcement cage and the steel water tank, installing the reinforcement cage, installing a guide pipe, filling pile body concrete, digging the hole after excavation, constructing and reinforcing a ring beam and the like. According to the construction method, by optimizing the pile foundation construction technology and adopting the mode that the steel water tank and the reinforcement cage are combined and poured on site, the hole opening difficulty is greatly reduced, the pile chiseling time is greatly shortened, instability caused by disturbance of a pile body is effectively prevented, the overall stability of an enclosure structure is ensured, and the construction efficiency and safety are improved; and the device is effectively suitable for various municipal engineering small-caliber pipe jacking method construction.
Owner:CHINA MCC22 GROUP CORP LTD