80 results about "Accumulation fluid" patented technology

Provided is a method for preparing a sample surface for analysis that involves placing a sample surface in droplet-receiving relationship to a reservoir containing an analysis-enhancing fluid. Typically, the analysis-enhancing fluid is comprised of a mass spectrometry matrix material and a carrier fluid, and the carrier fluid is comprised of a low volatility solvent. A droplet of the analysis-enhancing fluid from the reservoir such that the droplet is deposited on the sample surface at a designated site. Such ejection is typically, but not necessarily carried out through the application of focused acoustic energy. Then, the sample is subjected to conditions sufficient to allow the analysis-enhancing fluid to interact with the sample surface to render the sample surface suitable for analysis. Optionally, the sample is analyzed at the selected site. Also provided are systems and devices for preparing a sample surface for analysis.

A method for diagnosing or differentially diagnosing a cancer characterized by the presence of cancer cells in the pleural fluid of a mammalian subject, the method comprising contacting a sample of pleural fluid of the subject with colloidal magnetic particles coupled to a ligand which binds to a determinant on a cancer cell, but does not bind above a baseline threshold to other cellular and non-cellular components in pleural fluid; subjecting the pleural fluid-magnetic particle mixture to a magnetic field to produce a cell fraction enriched in ligand coupled-magnetic particle-bound cancer cells, if present in the pleural fluid; and analyzing the enriched fraction for the number of cancer cells in the pleural fluid. In certain aspects, this method involves preparing the pleural fluids for the above-noted method steps by, e.g., dilution of unprocessed pleural fluid. In certain aspect, the pleural fluid is subjected to the diagnostic method within 24 hours of withdrawal from the subject. This method has advantages to present diagnostic procedures for identifying malignant pleural effusions. The tumor cells present in pleural fluid can be characterized with cellular and molecular markers to determine prognostic and predictive factors.

The invention discloses a method and device for mechanically removing sand and draining liquid from a pit shaft of an oil / gas well in an underbalanced state. In the underbalanced state, kinetic energy of working solution is converted into mechanical energy of a spiral drill bit, and a sand body is cut and lifted and then returns to the ground along with the working solution; and after sand is removed, liquid drainage process gas is injected into the pit shaft to drain accumulation liquid in the pit shaft, so that production of the oil / gas well can be restored. According to the method and device for removing sand and draining liquid, the velocity pressure of a working solution column is lower than the formation pressure during the sand removal process, so that the working solution is prevented from leaking effectively, and pollution to the formation can be reduced; kinetic energy of the working solution is converted into mechanical energy of the spiral drill bit, and the sand body depositing in the pit shaft is cut and lifted, so that formation damage caused by hydrodynamic impact can be prevented effectively, and complex circumstance of the formation can be prevented from being induced; and a gas injection auxiliary liquid drainage device is adopted to discharge working solution in the well, so that formation energy can be activated step by step advantageously, steady flow state of gas, liquid and oil can be established, and production of the oil / gas well can be restored quickly.

The invention belongs to the technical field of water drainage and gas recovery of a gas well, and particularly provides a method for removing gas well accumulated liquid by means of the oil jacket pressure balancing method. The method mainly comprises the steps of bottom hole accumulated liquid diagnosis, formation pressure prediction, flow inducing with the oil jacket balancing method, foam drainage and the like. The feasibility of the technique is determined through accumulated liquid diagnosis and formation pressure prediction. Liquid in a well and foaming agents can be well mixed through accumulated liquid flowing caused by the oil jacket balancing method, and liquid drainage effect is promoted cooperatively. The method is suitable for wells with certain stratum energy and reduced productivity due to liquid accumulation or dead wells. The method is not limited by well deflection, gas-liquid ratio, ground environment and the like and has the advantages of being simple, economical and practical.

The invention relates to an automatic chemical feeding device and method in a foam-drainage gas recovery well. The automatic chemical feeding device mainly comprises a ground chemical storage tank, a thin pipe valve, a thin pipe, a pressure difference control valve, an oil pipe and a casing. The ground chemical storage tank, the thin pipe valve, the thin pipe and the pressure difference control valve form a chemical feeding channel, the thin pipe and the oil pipe form an annular liquid discharge channel, and the pressure difference control valve mainly comprises a chemical inlet, an upper cavity, a valve spool ball, a conical valve seat, a lower cavity, a spring and a chemical outlet. The upper end of the pressure difference control valve is stressed by chemical gravity (constant in pressure), and the lower end thereof is stressed by return pressure at bottom of the well. The more the accumulated liquid is, the higher the return pressure at the bottom of the well is and the lower the downward pressure difference stressed on the valve spool ball is, so that the spring can overcome the pressure difference to support the valve spool ball upwards and chemicals are begun to be added. After the accumulated liquid is discharged, the pressure difference is larger than elastic force of the spring and presses the valve spool ball to stop chemical feeding. The automatic chemical feeding device can automatically feed and stop feeding chemicals according to level of the accumulated liquid, and the chemicals and the accumulated liquid at the bottom can be guaranteed to be sufficiently mixed.

The invention discloses an automatic control method of plunger gas-lift liquid drainage production of an oil-gas well. The automatic control method includes that a buffering clamping and fixing device and a plunger are lowered into an oil pipe after drifting, a gas production tree of the oil-gas well is connected with a blowout preventing pipe, a pneumatic membrane valve is arranged between a ground pipeline and the blowout preventing pipe and electrically connected with a plunger controller, the plunger controller realizes opening and closing of the gas well by controlling opening and closing of the pneumatic membrane valve, and a pressure sensor is arranged in a wellhead gas production chamber and electrically connected with the plunger controller; a casing pressure value when the plunger controller controls the oil-gas well to be open is set, a casing pressure value when the plunger controller controls the oil-gas well to be closed is set, the plunger controller receives casing pressure value signals measured by the pressure sensor, and opening and closing of the oil-gas well are controlled according to set well opening and closing conditions of the oil-gas well. Well opening or well closing of the oil-gas well is controlled according to changing circumstance of wellhead casing pressure and oil pressure of the oil-gas well, the changing circumstance is closely combined with liquid accumulating circumstance of the oil-gas well, optimal liquid lift quantity is guaranteed, and automated control management of the process of plunger gas-lift liquid drainage gas production is realized.

The invention relates to a repeated foaming device for a gathering and delivering pipeline of a foam drainage gas-production well in the natural gas gathering and delivering process. The repeated foaming device can solve the difficulty that natural production of a gas well is influenced by liquid accumulation, even blockage of the gathering and delivering pipeline, caused by foam burst and gas-liquid layering in the the gathering and delivering pipeline of the foam drainage gas-production well. A technical scheme of the invention is that an inlet gate valve is connected with an upstream gathering and delivering pipeline; the other end of the inlet gate valve is connected with a device housing A; a flange cover is arranged below the device housing A; a blowoff valve is arranged on the cover; one end of a filter cartridge is connected with an inlet of the device housing A while the other end thereof is connected with the blowoff valve; a hydraulic quick joint is mounted above the device housing A; a stirring blade is mounted on an outlet of the device housing A; an inlet end of a device housing B is connected with an outlet end of the device housing A; an outlet end of the device housing B is connected with an outlet gate valve; and the other end of the outlet gate valve is connected with a downstream gathering and delivering pipeline. By using the invention, a foaming agent can be injected into the gathering and delivering pipeline so that the accumulated liquid in the pipeline can foam again; moreover, solid-phase impurities in the pipeline is filtered to be removed so as to avoid gas-liquid layering and pipeline blockage.

The invention discloses a gas well downhole drainage and gas production tool based on integration of jet flow and vortexes. The gas well downhole drainage and gas production tool comprises a jet flow generator, a vortex generator and a fishing assembly, wherein the jet flow generator and the vortex generator are connected; the fishing assembly is connected with the vortex generator; a vortex drainage cavity is formed inside the vortex generator, and spiral blades are arranged on the inner wall of the vortex drainage cavity; and a jet flow nozzle of the jet flow generator communicates with the vortex drainage cavity. By adoption of the internal vortex design, the problem that a jet flow low-flow-rate area carries fluid can be solved, and the problem that as fluid is accumulated on the upper portion of the jet flow generator, back pressure of an outlet of the jet flow nozzle is increased and normal production of a gas well is affected can be effectively prevented.

The invention discloses a spinal puncture teaching model, belonging to the field of medical teaching. The spinal puncture teaching model comprises a spinal puncture model, a puncture needle, a cerebrospinal fluid flow guide device, an operation control circuit and a flexible drainage pipe, wherein the spinal puncture model consists of a lumbar vertebrae bone, a sacral vertebrae bone and a round pipe; a pressure sensor is arranged in the round pipe; a needle handle is provided with a side through pipe and a straight through pipe; the cerebrospinal fluid flow guide device consists of a liquid storage tank, a liquid feeding port, a liquid discharging port, cerebrospinal-fluid drainage liquid, a micropump, a micropump power supply circuit and a hydrops depth control floater; the operation control circuit consists of a power supply, a position indicating circuit and a hydrops depth control floater; and the position indicating circuit consists of a pressure sensor, an in-place indicating lamp and a relay. The spinal puncture teaching model disclosed by the invention has the beneficial effects that the effects of convenience, durability and intuition can be achieved, the notification of the operation practice working and the finishing condition information of spinal puncture can be directly realized, the repeated use can be achieved, and the purpose that the spinal puncture teaching model can bear the practice of repeated operation and training is realized.

The invention relates to an oil pipe gas injection and water drainage technique and tools thereof and belongs to the technical field of oil pipe gas injection and water drainage. According to the oil pipe gas injection and water drainage technique, gas is delivered into the top portion of an annular hollow space between an oil pipe and a sleeve, passes through the bottom of the oil pipe and then is discharged out of a shaft from a tubular column. In this way, in the gas moving process, all loading liquid in the shaft can be drained efficiently, the problems that in the existing gas injection and water drainage technology, the recovery efficiency is low, the pressure bearing capacity is low, and self-test sealing cannot be achieved are solved, and requirements of oil field production are met. In addition, the tools of oil pipe gas injection and water drainage are ingenious in design, after all the operation tools are connected into the tubular column, setting and releasing can be achieved at a time by putting the tubular column into the shaft, operation is easy, and torque does not need to be provided; and furthermore, an isolation packer of the operation tubular column has a self-test sealing function, effective setting of the tubular column is guaranteed, and normal production of gas injection and water drainage of the shaft is guaranteed.

The invention provides a cooling liquid circulation system of a high-load CPU mist spraying phase-change refrigerating device and a control method of the cooling liquid circulation system. The cooling liquid circulation system comprises a cooling liquid tank, a pipeline, a jetting cavity, a micropump set, a tee joint, a mist spraying cavity, a condenser, a radiator and a single-chip microcomputer. According to the cooling liquid circulation system and the control method, distribution of different cooling liquid flow and different cooling liquid pressure is achieved through the two-level micropump set, power consumption is further reduced under the condition that use requirements are met, and meanwhile the installation space of the system is reduced; negative pressure formed in the jetting cavity is used for sucking out accumulated cooling liquid in the mist spraying cavity, and circulation of the cooling liquid is achieved; the design of the closed mist spraying cavity and a closed-loop circulation system are adopted, the cooling liquid can be completely isolated from the outside, and safety of adopted equipment is ensured; and a complete self-circulation function is achieved, the beneficial effects of high radiating efficiency, low power consumption, low noise and the like are achieved, and the cooling liquid circulation system and the control method are suitable for high-load chip radiating of single desktop computers, high-performance work stations and the like.

The invention discloses a low-pressure gas well eddy current plunger water drainage and gas collection device. The device is designed in order to effectively drain gas well accumulated liquid under the condition that the gas well energy is unchanged. The device consists of first and second eddy current underground seating devices and first and second plungers, wherein the first eddy current underground seating device is used for accelerating a gas flow at the bottom of a gas well and buffering falling impact of the first plunger; the second eddy current underground seating device is used for accelerating the middle gas flow of the gas well and buffering falling impact of the second plunger. According to the device, during well opening, the first plunger and accumulated liquid above the first plunger are pushed by the bottom gas flow of the gas well accelerated by the first eddy current underground seating device to the second eddy current underground seating device and the second plunger, the gas flow with speed loss is accelerated again by the second eddy current underground seating device in a relay manner to push the second plunger and the liquid lifted by the first plunger to smoothly reach the wellhead, so that safe and effective well liquid lift under the condition that the gas well energy is unchanged is realized.

The invention belongs to the field of medical instruments, particularly relates to a thoracic surgery wound cleaning device and aims to solve the problem of inconvenience in cleaning due to the fact that cleaning is affected as tube heads of liquid outgoing tubes and liquid sucking tubes are prone to mutual interference when existing thoracic surgery wound cleaning devices are used for cleaning. The device comprises a box fixed on a supporting mechanism and a cleaning mechanism connected on the box, the inside of the box is divided into a cleaning liquid storage cavity, a sewage storage cavityand a mounting cavity, and a conveying pump and a backflow pump are fixedly mounted in the mounting cavity. By arranging a hard flushing pipe, a hard liquid absorbing pipe, a gear, a first rack, a second rack, a U-shaped holding rod, a controller, the conveying pump, the backflow pump and a forward-backward rotation motor, continuity of wound flushing and accumulated liquid sucking is high, timecan be saved, and efficiency can be improved.

The invention relates to a saline flow detection device of a freezer, which is especially applicable to the freezing-method shaft sinking construction. A vaporizer is sealed and communicated with a liquid distribution ring by a pipeline; the liquid distribution ring is sealed and communicated with the feeding pipe of each freezer via the pipeline and a valve; the drainpipe of each freezer is respectively sealed and communicated with a liquid accumulation ring via the pipeline and the valve and is respectively sealed and communicated with the detection ring via a hose and the valve; and the detection ring is sealed and communicated with the vaporizer by a flowmeter and the pipeline. According to the saline flow detection device, time and labor are saved, and environmental pollution is avoided.

The present invention provides a moving plunger for gas well production with water withdrawal which is simple in structure and good in accumulated fluid withdrawal effect. The moving plunger comprises a fish head, a sealing rod in the fish head, a retaining sleeve which is arranged between the fish head and the sealing rod and used for limiting the movement range of the sealing rod, wherein the lower part of the fish head is screwedly connected with an outer sleeve, a drop bar is movably arranged in the outer sleeve; and the outer part of the outer sleeve is sleeved with an elastic sealing claw. The tool vertically floats due to the pressure in well, so that the shaft accumulated fluid is lifted and discharged through a well opening, and finally natural gas is developed or water flooding of other gas wells in the same air reservoir is delayed and avoided, so as to improve the production state of the whole air reservoir and increase the final production rate of the air reservoir. The moving plunger has features of simple structure, good accumulated fluid withdrawal effect, long service life, and achieves the purpose of gas production and yield increase.

The invention discloses a thoracic cavity closed drainage device of respiratory nursing department, which comprises a containing device, which is used for containing hydrops in the thoracic cavity; avacuum pump, which is used for forming a certain vacuum degree in the containing device by vacuumizing; a conduit, one end extending into the containing device and the other end extending into the pleural cavity to direct the hydrops into the containing device; a pressure coordinating mechanism, which is used for compensating the pressure to the containing device to reduce the reduction degree ofthe negative pressure when the patient inhales. When the patient inhales, the volume of the thoracic cavity is increased, so that the negative pressure degree in the thoracic cavity is increased, andmeanwhile, the pressure coordinating mechanism supplements the pressure in the containing device and further supplements the pressure in the thoracic cavity, so that the negative pressure degree in the thoracic cavity is not changed greatly, or to a lesser extent, thereby preventing excessive dilatation of the lungs during inhalation at the beginning of the drainage procedure.

The invention discloses an effusion discharging apparatus used in oncology nursing. The effusion discharging apparatus used in oncology nursing comprises an effusion discharging apparatus body; a handle, which is L-shaped as a whole, is fixedly arranged on the left side of the upper surface of the effusion discharging apparatus body; an effusion collection chamber is arranged inside the effusion discharging apparatus body; and a piston chamber and a driving chamber are arranged, above the effusion collection chamber, inside the effusion discharging apparatus body. By adopting cooperation of aneffusion discharging needle, a switch controller, a driving motor, a rotating wheel, a connecting pin, a movable rod, a hinged seat, a piston rod and a sliding hole, the effusion discharging apparatus used in oncology nursing is capable of allowing a piston plate to carry out leftward and rightward piston motion inside the piston chamber, thereby rapidly discharging tumor effusion from the patient body; and thus, the effusion discharging apparatus is time-saving and labor-saving. Moreover, as a whole apparatus, the effusion discharging apparatus is small in volume, easy to operate and use, very convenient for portable use, and suitable for promoted use.

A single use pleural drainage set for medical use, which allows drainage by all physicians of air (pneumothorax), blood (hemothorax) and all other liquids (hydrothorax) accumulated abnormally in the thoracic cavity (pleural space (I)).

A method of using fluid aspirates as vehicles for drug delivery by collecting a fluid aspirate such as synovial joint effusion, pleural effusion, pericardial effusion, or ascites from a patient and centrifuging the fluid aspirate to provide a supernatant and a sedimented material. The sedimented material can optionally be further purified. One or more factors such as cytokines, bone morphogenetic proteins (BMPs), pharmaceutical drugs and gene vectors are added to the sedimented material or supernatant, optionally also including a biologically compatible medium such as a bioabsorbable sponge, so as to provide a vehicle for the one or more factors for reintroducion into the patient.

The invention discloses an atomizing nozzle and a cooling device having the same. The atomizing nozzle includes a matrix and a liquid inlet pipe; the matrix is provided with a gas channel; the gas channel includes a contraction section and a throat pipe section which are in sequential connection; the first end of the contraction section is connected to the throat pipe section; the cross-sectionalarea of the contraction section is gradually decreased in a direction toward the throat pipe section; the cross-sectional area of the throat pipe section is maintained unchanged in a length direction;and the liquid outlet end of the liquid inlet pipe stretches into the throat pipe section so that liquid can enter the throat pipe section. According to the atomizing nozzle, through the arrangementof the contraction section and the throat pipe section in the gas channel, a negative pressure cavity can be formed in the throat pipe section when air flow enters the throat pipe section from the contraction section to circulate, so that mist spraying can be realized by utilizing siphon action without extra arranging a water pump, and therefore, production costs can be saved; the atomizing nozzlecan realize good spraying effects, so that liquid accumulation can be avoided; and the atomizing nozzle is simple in structure, easy in processing and manufacturing and low in production cost, and has strong practicality.

The invention relates to the technical field of medical apparatus and instruments, in particular to a hydrops extraction device for an endocrinology department. The device comprises a liquid extraction device, an operation platform, an electric telescopic rod and a base; the liquid extraction device comprises a fixing plate, a negative pressure tube and a group of positioning tubes; the negative pressure tube is of a T-shaped structure, a liquid extraction needle is arranged on the front part of the negative pressure tube, a piston rod is arranged in the negative pressure tube, and a branch pipe arranged on the lower portion of the negative pressure tube is connected with a spherical collection bottle; the positioning tubes are arranged on the side face of the fixing plate through mounting holes, a sucker is arranged on the front part of each positioning tube, a piston rod is arranged inside each positioning tube, a hemispherical fixing sleeve is arranged on the upper end face of the operation platform, the operation platform is connected with the base through the electric telescopic rod, and the base comprises a bearing plate and supporting feet which comprise connecting plates and rolling wheels. Accordingly, medical staff do not need to hold the extraction device for a long time, the wound area of a patient cannot be increased, and meanwhile the possibility that a sampling solution is polluted by the outside can be prevented, and the height of the extraction device can be adjusted.

The invention discloses a wind driven generator liquid cooling device and a wind driven generator comprising the same. The wind driven generator liquid cooling device comprises a generator which comprises a driving end and a non-driving end and is obliquely arranged relative to a horizontal plane so that the driving end is higher than the non-driving end; and liquid cooling pipes arranged in the generator, wherein the joints of the liquid cooling pipes are arranged at the non-driving end. According to the invention, the generator is obliquely mounted, and the connecting parts which easily suffer from leakage are arranged at the non-driving end of the generator, so that the influence of liquid leakage on the generator is reduced. In addition, a water collecting disc and an accumulated liquid monitoring device are further arranged, so leakage of the cooling liquid can be found in time, and the defect that it is difficult to carry out judgment from the flow of a cooling liquid loop or thereading number of a pressure sensor when a small amount of leakage occurs is overcome.

The invention relates to a waste accumulated liquid drainage detecting device for a process unit. A lower cover and partitions are respectively mounted on a working table of the process unit, the first partition is positioned on the inner side of the lower cover, one end of an inner cover is hung on the first partition while the other end of the inner cover is abutted to the lower cover, an upper cover is positioned on the outer side of the inner cover and is inserted in the lower cover; and a flow guide cavity is formed between the upper cover and the inner cover; the lower cover is connected with an accumulated liquid box, an inner sleeve is placed in the accumulated liquid box, an accumulated liquid feedback cavity is formed between the inner sleeve and the inner wall of the accumulated liquid box, and the lower cover below the flow guide cavity communicates with the inside of the inner sleeve to form a liquid drainage flow channel; and the upper end of the inner sleeve is connected with a lower sleeve in an inserted manner, a plurality of openings through while the liquid drainage flow channel communicates with the accumulated liquid feedback cavity are uniformly distributed in the lower end of the inner sleeve in the peripheral direction, and an accumulated liquid sensor which extends into the accumulated liquid feedback cavity is arranged on the accumulated liquid box. Liquid accumulation and liquid leakage which are caused by the reason that waste liquid is condensed or a pipeline is unsmooth can be prevented well, and the purpose of early warning is achieved by triggering the accumulated liquid sensor.

The invention belongs to the technical field of petroleum reservoir exploitation, and particularly relates to an oil-water well self-accumulation and sand prevention construction method. The oil-waterwell self-accumulation and sand prevention construction method includes the following steps that (1) an oil-water well is processed in the early stage; (2) site fluid preparation is conducted, specifically, self-accumulation fluid, a self-accumulation assistant and consolidating fluid are prepared correspondingly on site; and (3) squeezing into is conducted. According to the method, through the construction method by injecting different chemical reagents in sections, the purposes of oil-water well formation gravel self-accumulation and sand prevention are achieved.

The invention relates to a wavelet-based ventilator pipeline effusion automatic detection method which comprises detecting an inhalation starting point based on a flow velocity waveform, detecting anexhalation starting point based on the flow velocity waveform, performing wavelet decomposition on a respiratory pressure waveform and performing effusion detection based on a dynamic threshold. According to the method, the condition of the effusion in a pipeline can be detected automatically in real time, the erroneous triggering of a ventilator caused by the effusion in the ventilator pipeline and the injury to a patient caused by the airflow transportation obstacle caused by the change of the airway diameter are effectively reduced, the use level of the ventilator is improved, and the treatment effect of the patient is improved.

The invention discloses a drainage device used in thyroid surgery. The drainage device comprises a supporting plate, wherein a connecting ring is arranged on the lower surface of the supporting plate, a waste liquid tank is connected to the lower end of the connecting ring, a pressure intensity sensor is arranged on one side of the top of the inside of the waste liquid tank, a through hole is formed in the upper surface of the supporting plate and corresponds to the opening formed in the upper end of the waste liquid tank, the pressure intensity in the waste liquid tank can be detected through the pressure intensity sensor so that detection of the pressure intensity in the waste liquid tank can be more convenient, the drainage tube can be inserted into the body of a patient through a fixing handle, and the drainage tube can be fixed to the body of the patient through a fixing constraint strap so that the patient can more convenient to move. The drainage device used in thyroid surgery is simple in structure, simple and convenient to operate and can more conveniently suck hydrops inside the thyroid gland of the patient, the device can be taken down and only the drainage tube is left on the body of the patient when the patient moves, so that the patient is more convenient to move, and the pain of the patient is effectively relieved.

The invention discloses a dynamic monitoring method for gas-liquid sealing performance of a plunger gas-lift process. The method comprises following steps: 1), dynamic pressure Ptub<[n]> (shown in thedescription) of a wellhead oil pipe and dynamic pressure Pcas<[n]> (shown in the description) of a wellhead casing pipe are measured by a wellhead pressure sensor, and mass ml<[0]> (shown in the description) of an accumulated liquid column above a plunger during well opening and lifting is calculated; 2), driving pressure difference deltaP<[0]> of the plunger at the starting moment is calculated;3), instantaneous displacement Sp<[n]> (shown in the description) of the plunger in the upward lifting process of the plunger is measured by a displacement sensor in the plunger; 4), instantaneous velocity Vp<[n]> (shown in the description) of the plunger during upward lifting is calculated; 5), driving pressure difference deltaP<[n]> of the plunger operating to different positions of a shaft inthe upward lifting process is calculated; 6), gas rate beta<[n]> of the accumulated liquid column above the plunger at different moments in the lifting process is calculated; 7), liquid leakage mass flow Mleak<[n]> (shown in the description) of the upper part of the plunger at different moments in the lifting process is calculated, the gas-liquid sealing performance of the plunger gas-lift processis evaluated, dynamic monitoring for the gas-liquid sealing performance of the plunger gas-lift process is completed, and with the adoption of the method, the gas-liquid sealing performance of the plunger in the lifting process can be accurately monitored in real time.

The invention discloses a drawer for refrigerators and a refrigerator with the same. The drawer for refrigerators comprises a drawer body, the drawer body has a storage space and comprises an outer casing and an inner casing, the inner casing is arranged in the outer casing, and a cold accumulation fluid containing cavity for containing cold accumulation fluid is defined between the inner casing and the outer casing. According to an embodiment of the invention, the drawer for refrigerators has the advantages of keeping foods fresh and prolonging preservation period of foods greatly when used for storing the foods.

The invention belongs to the technical field of pericardiocentesis liquid extraction, and particularly relates to a pericardiocentesis liquid extraction device for cardiology department. The device comprises a liquid storage tank, a liquid inlet pipe and an air outlet pipe are inserted into the upper surface of the liquid storage tank, both the liquid inlet pipe and the air outlet pipe extend intoan inner cavity of the liquid storage tank, and two one-way valves can conveniently extract out effusion, conveniently discharge the extracted effusion and continuously suck the effusion; the matching effect of a limiting baffle and a supporting spring can elastically support a piston plate rightwards, so that the piston plate and a push rod can be elastically reset, and operation is convenient;the protection effect of a protective cover can prevent the liquid suction pipe from making direct contact with human organs, so that the human organs are protected, and human tissue damage caused byfriction is avoided; the arrangement of sterilization equipment can conduct ultraviolet sterilization on accumulated liquid entering the liquid storage tank; and the arrangement of a filter can conduct disinfection on output gas.

The invention discloses a concentric pipe heat tracing natural gas exploitation method and a special tubular column. The exploitation method comprises the steps as follows: a concentric pipe heat tracing gas injection and exploiting process tubular column is assembled and placed downwards, wherein the tubular column comprises an oil tubular column (1), an oil tubular column (2), a sleeve column (3), a linkage short joint (5), an underground throttle main body (6), an underground throttle nozzle (7) and the like; a gas exploitation well opening is mounted; a ground gas heating device is mounted; natural gas is heated and injected into a circular space between the oil tubular column (1) and the oil tubular column (2), and returns to the oil tubular column (1) via a high-temperature gas exhausting hole (4), natural gas produced from a stratum flows through the underground throttle to generate a negative pressure zone, the high-temperature natural gas heated on the ground is driven by negative pressure at the high-temperature gas exhausting hole (4) to easily flow into the oil tubular column (1) without external pressure, is mixed with the natural gas produced from the stratum, and then returns to the ground via the oil tubular column (1). The concentric pipe heat tracing natural gas exploitation method and the special tubular column are mainly used for solving the problem of liquid accumulation in the bottom of the well during gas well production.