403 results about "Screw pump" patented technology

Eccentric screw pump with a rotor of a drive shaft circulating essentially about a fixed axis in relation to the stator in a bearing block, a power train and a screw conveyor, which revolves in a rotating-oscillating manner in a screw flight of the stator, wherein the power train provides the screw conveyor with its drive torque and the power train adjusts the differences of the motion sequences of the screw conveyor and of the drive shaft, wherein the power train consists essentially of a one-piece rotational body, which has multiple weakening recesses, which interrupt its outer circumferential jacket surface more than only insignificantly and which provide it with that reversible elasticity, which it requires in order to rotate about an axis of rotation, which curves in a periodically recurring manner at least in sections.

The invention discloses an anti-airlock method and equipment for an electric submersible screw pump based on working condition recognition and a medium, and relates to the technical field of oil exploitation equipment. The method comprises the steps that based on an underground detection device and a ground control cabinet sensor of the electric submersible screw pump unit, operation parameters of the electric submersible screw pump unit are collected in real time, and the operation parameters are preprocessed to obtain standard operation parameters; wherein the operation parameters comprise pump inlet pressure and motor output current; extracting pressure-current correlation characteristics under the airlock working condition to construct an airlock working condition identification model, and inputting the standard operation parameters into the airlock working condition identification model to obtain an airlock state grade; and based on the airlock state grade, the operation regulation and control strategy of the electric submersible screw pump unit is adjusted so as to eliminate the airlock phenomenon. Real-time data of underground and ground sensors are collected, the airlock grade is judged in advance through the airlock working condition recognition model, the operation state is automatically adjusted, and early warning of the airlock is achieved.

The utility model discloses a screw pump with an adjustable shaft seal position structure, which relates to the technical field of screw pumps and comprises a driving screw, a shaft elastic retainer ring is arranged on the outer side of the top of the driving screw and clings to the end of an adjusting shaft sleeve, a sealing gland is fixedly connected to the outer side of the driving screw, and the sealing gland is fixedly connected to the outer side of the driving screw. A bearing seat is arranged at the end, close to the front end cover, of the sealing gland, a screw is in threaded connection with the end, away from the front end cover, of the sealing gland, the bearing seat is in threaded connection with the sealing gland through the screw, and a bearing is arranged at the bottom of the end, close to the front end cover, of the driving screw. Wherein an O-shaped sealing ring groove is formed in the outer surface of the bottom of the driving screw rod, an elastic check ring groove for a hole is formed in the outer surface of the top of the driving screw rod, an adjusting shaft sleeve is arranged on the outer side of the driving screw rod, and the technical problems that the sealing replacement process is tedious, only one sealing material can be selected, and many limitations exist are solved.

The utility model discloses a screw pump with a laminated shaft seal structure, which relates to the technical field of screw pumps and comprises a screw pump body, a driving screw is arranged at one end of the screw pump body, one end of the screw pump body provided with the driving screw is connected with a bearing seat, one side of the bearing seat is movably connected with a sealing gland, and the other side of the bearing seat is provided with a shaft seal. A plurality of groups of sealing base plates are arranged between the sealing gland and the bearing seat in a stacked mode, the whole effective sealing time is prolonged by multiple times by adopting the multiple shaft seals to be used alternately, shaft seal materials can be selected, the shaft seals made of different materials are adopted, and the medium adaptability and the sealing effect can be more superior and more obvious. By means of the sealing gasket, the shaft seal can be adjusted on the premise that general assembly parts such as a motor and a coupler do not need to be disassembled, maintenance operation is simplified, and maintenance cost is saved.

The invention discloses an underground intelligent oil extraction pump and system. The oil extraction pump comprises a plurality of sensors, and an oil pipe, a screw pump, a motor, a gas-liquid separation device and a sand-washable gas anchor which are connected from top to bottom, the sensor is used for collecting underground environment data and motor working state data; the controller is used for acquiring and encoding data acquired by the sensor, receiving a control instruction and sending a corresponding control signal to the motor; the motor drives the screw pump to work according to working parameters indicated by the control signal; the screw pump is used for pumping oil-containing liquid in the well through an oil pipe or pumping cleaning liquid on the well into the well through the oil pipe; the system comprises an underground intelligent oil extraction pump and a ground control cabinet, the ground control cabinet is used for receiving the coded data transmitted by the controller, monitoring the underground working condition and controlling the working state of the motor according to the monitoring result. The oil extraction pump and the system effectively prolong the pump inspection period, save manpower resources, effectively reduce abnormal working conditions in a well, and prolong the service life of the oil extraction pump.

The invention relates to the technical field of oil field oil production engineering, in particular to an underground data acquisition unit with flow, pressure and temperature monitoring functions and a method. The method is suitable for underground working condition monitoring of submersible motor type lifting equipment such as submersible screw pumps, submersible plunger pumps and submersible centrifugal pumps. The unit comprises a pressure-resistant shell, wherein a central pipe, an electromagnetic flowmeter, two pressure and temperature sensors and an underground parameter collector are integrated in the pressure-resistant shell; the two sensors are used for measuring the temperature and pressure of liquid flow of the central pipe and the temperature and pressure of an oil casing annulus respectively; the electromagnetic flowmeter measures the flow, and real-time temperature and pressure data are used for compensation to improve the precision. The unit is further provided with a collecting pipe, an upper end, a lower end, a connecting sliding ring, an annulus / oil pipe inner testing channel, a sealing rubber ring and the like. Through the integrated design, synchronous high-precision in-situ monitoring of underground key parameters is achieved, the problem that underground data of multiple instruments are not synchronous is solved, and a reliable data terminal is provided for an intelligent oil field.

The utility model discloses a triangular-cone-shaped high-temperature-resistant and hydrogen-sulfide-resistant screw pump sealing impact device, the main body structure of the triangular-cone-shaped high-temperature-resistant and hydrogen-sulfide-resistant screw pump sealing impact device is a lower sealing occlusion ring and an upper sealing occlusion ring which are occluded up and down, and the triangular-cone-shaped high-temperature-resistant and hydrogen-sulfide-resistant screw pump sealing impact device comprises the lower sealing occlusion ring and the upper sealing occlusion ring, the bottom face of the upper sealing meshing ring is provided with a triangular cone-shaped meshing groove, and the material has the advantages of being good in high temperature resistance, hydrogen sulfide resistance and abrasion resistance, high in strength and good in toughness. Through the arrangement of the lower sealing occlusion ring and the upper sealing occlusion ring, close fit of the lower sealing occlusion ring and the upper sealing occlusion ring can be achieved, the occlusion face is of the regular triangular cone type three-dimensional structure distributed in the radial direction, the structure has the good impact resistance and anti-scouring characteristics, the overall structure is simple in process, convenient to install and long in service life, and the service life is long. The stable sealing performance of the sealing device in a high-temperature and hydrogen sulfide environment is ensured, and medium leakage is prevented.

The invention relates to the technical field of oil well paraffin removal, in particular to an electric submersible screw pump well anti-paraffin-deposition chemical injection and thermal washing integrated device. Comprising a pesticide injection barrel, a high-pressure plunger pump, a three-way valve and a connecting pipe, the connecting pipe is fixedly connected and communicated with a plurality of butt-joint pipes, annular injection assemblies with the same number as the butt-joint pipes are arranged outside an oil pipe, and the butt-joint pipes are communicated with the corresponding annular injection assemblies respectively. A paraffin remover and hot water are injected at fixed points at different depths of an oil pipe through a plurality of butt joint pipes, so that a paraffin removal medium completely bypasses the electric submersible screw pump, chemical swelling and high-temperature thermal damage of the agent to stator rubber are avoided fundamentally, the service life of the pump is remarkably prolonged, meanwhile, the paraffin remover and the hot water are continuously supplemented at different depths, and the service life of the pump is prolonged. The concentration of the paraffin remover is kept stable, the temperature of hot water is kept, the dissolving strength of the paraffin remover on a paraffin precipitation layer and the melting effect of the hot water on wax are ensured, and the paraffin removal thoroughness and the operation efficiency are greatly improved.

The three-screw pump comprises a mechanical seal, a sealing support, a front cover, a pump body, a lining, a driving screw, driven screws, the L-shaped shaft shoulder sleeve and a bearing, the lining is fixed in the pump body, and the driving screw and the two driven screws are assembled in a cavity of the lining in a meshed mode; the front cover is fixed to the front end of the pump body, the sealing support is fixed to the outer side of the front cover, the mechanical seal sleeves the end, extending out of the front cover, of the driving screw, a static ring of the mechanical seal is connected with the sealing support, and a movable ring is connected with the driving screw. The bearing is arranged at the end, away from the driven screw, of the driving screw, the inner ring of the bearing is in interference fit with the driving screw, the outer ring of the bearing is fixedly connected with the cover plate, and the shaft shoulder section of the driving screw is sleeved with the L-shaped shaft shoulder sleeve which is located between the driving screw and the front cover. And the mounting mode and the fit clearance of the L-shaped shaft shoulder sleeve are selected according to different pressure grades, so that the economic loss and the repair progress influence after shaft sticking are reduced.

The utility model discloses an adjustable safety cover for a screw pump unit, which relates to the technical field of screw pump unit facilities and comprises a safety cover fixed end, a safety cover movable end is movably connected in the safety cover fixed end, and the safety cover fixed end comprises a fixed end face plate, a fixed end side face plate and a fixed end cover plate. The safety cover movable end comprises a movable end face plate, a movable end side face plate and a movable end cover plate. Handles are arranged above the fixed end cover plate and the movable end cover plate, and the fixed end cover plate and the movable end cover plate are connected through the handles; an adjusting assembly is arranged between the safety cover fixed end and the safety cover movable end, the adjusting assembly comprises a sandwich plate and a second groove, the length of the whole safety cover can be adjusted within a certain length range through cooperation of a bolt, a nut, a hole and a boss, the length can be fixed, and therefore the safety cover can replace original safety covers of various specifications; the universality of the safety cover is improved, and the management cost is reduced.

A kind of bridge breaking structure of sludge screw pump, including shell, motor group, main shaft, screw, the shell is provided with feed hopper, it is characterized in that: the main shaft is coaxially provided with sludge breaking piece, rotating door piece between screw, the main shaft is provided with key type protruding portion along radial direction, the rotating door piece includes shaft sleeve part, connecting arm, arc baffle part, expansion piece, the shaft sleeve part is equipped with the inner hole with the outer diameter of main shaft adaptation, the inner hole wall is coaxially provided with the annular groove with the diameter of key type protruding portion adaptation, axial width adaptation, the annular groove is provided with several expansion holes around the center of circle equal division, the expansion piece is arranged in expansion hole and does sliding fit, the expansion piece rotates with rotating door piece angle, by gravity, exceeds expansion hole and key type protruding portion and forms synchronous rotation by abutting, or retract in expansion hole and let key type protruding portion pass through;The arc baffle part gradually rotates with the main shaft, intermittently closes, opens feed inlet.

The invention belongs to the technical field of surgical instruments, and particularly relates to a gastrointestinal fluid decompression device for gastrointestinal surgery, which comprises a shell, a negative pressure assembly, a cleaning assembly and a switching mechanism, the switching mechanism drives the negative pressure assembly and the cleaning assembly to be in butt joint with the butt joint opening in a negative pressure mode and a cleaning mode correspondingly and form negative pressure and release cleaning liquid in a pipeline connected with the butt joint opening correspondingly, the negative pressure assembly is a negative pressure peripheral pump, the cleaning assembly is a liquid conveying screw pump, the switching mechanism comprises a gear ring and a motor, the gear ring is rotationally arranged in the shell, and the motor is arranged in the shell. A transmission gear is arranged on an output shaft of the motor and meshed with the outer side of the gear ring, the inner side of the gear ring is meshed with a rotating shaft of the negative-pressure peripheral pump and a transmission rod of the liquid conveying screw pump, and positive and negative rotation of the gear ring is used for driving the negative-pressure peripheral pump and the liquid conveying screw pump to be switched to the butt joint position of the butt joint opening and driving the rotating shaft and the transmission rod to rotate. The negative pressure can be provided and the pipeline can be cleaned by switching positions.

The present application belongs to the technical field of oily sewage treatment, and specifically discloses an oily sewage treatment system for an oil sand oil treatment station, which comprises a first treatment pool, a second treatment pool and a high-temperature ethylene glycol main pipe, the two pools are connected through a connecting pipe with a sand filtering assembly, a cover is arranged on the top of the pool body, a screw pump is installed on the cover of the second treatment pool through a support, the rotor and the stator of the screw pump extend into the pool, an oil liquid inlet pipe is connected to the first treatment pool, an inclined sand screening plate is arranged in the first treatment pool, high-temperature ethylene glycol coils are arranged on the bottom of the two pools, the coils are connected with the high-temperature ethylene glycol main pipe and have a gap with the bottom of the pool, and a loading sewage discharge pipe is further arranged in the pool. The present application is aimed at the problem that the existing sewage discharge pool is prone to freezing and solidification of oil liquid in a low-temperature environment, thereby affecting secondary treatment. In the present application, the sewage enters the first treatment pool through the oil liquid inlet pipe, the sand screening plate is used to preliminarily remove sand, the oil liquid enters the second treatment pool through the connecting pipe after sand filtering, the high-temperature ethylene glycol heats the sewage through the coils, thereby reducing the viscosity of the oil liquid and preventing freezing, and the screw pump is used to extract and recycle the oil liquid.

The utility model discloses a vertical three-screw pump, which belongs to the technical field of screw pumps and comprises a pump head, a safety valve is arranged on the pump head, a connecting frame is arranged on the upper end face of the pump head, a motor used for driving the pump head is arranged on the upper end face of the connecting frame, and a base is arranged on the inner side of the connecting frame. A filter is arranged at the lower end of the base, oil liquid of an external oil conveying pipeline is filtered by the filter, surrounds the pump by one circle through a base pipeline of the base and then enters the pump head, and the high-pressure medium low-noise pump can be suitable for low-noise conveying of high-pressure media and is stable in operation and extremely small in vibration and noise.

The utility model discloses a screw pump for battery coating, which comprises a pump body, a feed pipe is arranged at one end of the pump body, a discharge pipe is arranged at the other end of the pump body, a pump core is arranged in the pump body, two ends of the pump core are respectively communicated with the feed pipe and the discharge pipe, and the feed pipe is communicated with the discharge pipe. The pump core comprises a stator and a rotor rotationally connected into the stator. A circulating pipeline is arranged between the discharging pipe and the feeding pipe, the circulating pipeline is communicated with the feeding pipe and the discharging pipe of the screw pump, a loop is formed between the discharging pipe and the feeding pipe, and when the screw pump stops supplying materials to the trolley, the ball valve is automatically opened, so that slurry in the screw pump is always kept in a flowing state; and the slurry is prevented from standing and depositing inside after the screw pump stops feeding, so that the risk of coating blockage can be reduced, the product quality is improved, the degree of wear of a dry material to the screw is reduced, and the maintenance cost of the screw is greatly reduced.

The invention belongs to the technical field of oil field oil extraction equipment, and particularly discloses a physical desorption silt prevention screw oil extraction system which comprises a screw pump body, a silt prevention assembly and a control unit. The screw pump body sequentially comprises a first oil chamber, a second oil chamber and a transmission chamber, the silt prevention assembly is arranged in the first oil chamber and the second oil chamber, and the control unit is electrically connected with the screw pump body and the silt prevention assembly. According to the physical desorption silt prevention screw oil extraction system, silt prevention of the screw pump is achieved through the physical desorption effect and the spiral flow guide silt prevention structure, so that the problem that the pump efficiency is reduced due to sediment attachment is solved, the service life of equipment is prolonged, and the oil extraction efficiency is improved.

The utility model discloses a melt conveying device for aluminum alloy semi-solid pressure casting, which comprises a metal melt storage device, a base and a support pillar, the metal melt storage device comprises a holding furnace and a crucible, the upper surface of the metal melt storage device is provided with a feed port, the lower surface of the metal melt storage device is provided with a discharge port, and the support pillar is arranged on the base. The bottom end of the discharging opening is connected with a screw pump, the screw pump comprises a feeding body, a motor, a gear, a driving shaft, a first driven shaft, a second driven shaft, a pump body, a pull rod and a discharging body, spiral blades are arranged on the surfaces of the driving shaft, the first driven shaft and the second driven shaft and are meshed with one another, and the left end of the screw pump is connected with a conveying pipe. And a discharge hole is formed in the other end of the conveying pipe. By means of the structure, the temperature of molten metal in the conveying process can be kept, solidification is prevented, and the flow speed and conveying pressure of the molten metal can be effectively controlled.

The invention discloses a strong self-suction high-pressure external double-suction double-screw pump which comprises a pump body, a screw pair is arranged in the pump body, the screw pair comprises a driving screw and a driven screw, each of the two screws comprises a rotating shaft, a left helical casing and a right helical casing, the left helical casing and the right helical casing are fixedly arranged on the periphery of the rotating shaft, and the rotating shafts, the left helical casing and the right helical casing are made into a whole; the left spiral sleeve and the right spiral sleeve on each screw are provided with tooth-shaped grooves with the same shape, the thread turning directions of the left spiral sleeve and the right spiral sleeve are opposite, and the surfaces of the tooth-shaped grooves are covered with wear-resistant rubber layers; and the left helical casing and the right helical casing on the driving screw are correspondingly meshed and paired with the right helical casing and the left helical casing on the driven screw. The screw rod pair adopts an integrated design, so that the structural rigidity is enhanced, and the pump can bear higher working pressure; meanwhile, the tooth-shaped groove of the spiral sleeve is covered with the wear-resistant rubber layer, so that fine control over the meshing clearance of the screw is achieved, medium backflow is greatly reduced, and the self-suction efficiency and the volume efficiency are improved.

The invention provides a combined type screw pump stator and a processing device and method for a lining layer of the combined type screw pump stator, and belongs to the technical field of screw pumps. The stator comprises a lining layer made of fiber reinforced composite materials, a metal outer layer wrapping the lining layer and connecting structures arranged at the two ends, and the connecting structures are mechanically connected with the inner layer and the outer layer at the same time and fixedly connect the inner layer and the outer layer into a whole. The machining device comprises a machine tool frame body, a first driving mechanism for driving the mandrel to rotate, a second driving mechanism for driving the winding mechanism to move in the axial direction of the mandrel, and the winding mechanism capable of precisely adjusting the fiber tension and the winding path. Through the unique composite structure design and mechanical connection mode, the problems that a traditional rubber lining stator is prone to aging and debonding and an all-metal stator is poor in sealing performance are solved, and the stator has excellent wear resistance and corrosion resistance and high structural reliability.

The high-pressure three-screw pump comprises a pump body, a driving screw and a driven screw, the driving screw and the driven screw are arranged in the pump body, an inlet is formed in one end of the pump body, an outlet is formed in the other end of the pump body, and low-pressure cavities are formed in the positions, close to the inlet, of the driving screw and the driven screw. The positions, close to the outlet, of the driving screw and the driven screw are high-pressure cavities, and low-pressure balance systems are arranged at the two ends of the driven screw. The low-pressure balance system comprises a low-pressure balance cavity, the low-pressure balance cavity is located at the end, away from the inlet, of the driven screw, and the low-pressure balance cavity communicates with the low-pressure cavity through a flow channel. And the extrusion state of the driven screw is changed into an external stretching state through low-pressure balance, so that the friction between the driven screw and the lining is reduced, and the durability is greatly improved.

An eccentric screw pump with a helical rotor and a stator made of an elastomer material, in which the rotor rotates by forming several pump chambers, wherein the stator is vulcanized into a preferably metal support pipe, wherein the stator has at least one sensor, which is inseparably connected to the stator, wherein the inseparable connection between the stator and senor is made by vulcanization.

The utility model relates to three screw rod pump technical field, concretely relates to three screw rod pump for conveying high temperature lubricating grease, including double -deck heat preservation pump body, shaft seal, screw rod to be used for double -deck heat preservation pump body's double -deck welding type heat preservation mechanism, be used for shaft seal's mechanical seal flushing mechanism, be used for screw rod's axial thrust mechanism. The three screw rod pump for conveying high temperature lubricating grease, through having the double -deck welding type with heat preservation function's double -deck heat preservation pump body design, make it in the conveying high temperature lubricating grease pumping process, realize high pressure material in low pressure chamber when in overpressure is introduced, through having the shaft seal design with mechanical seal flushing system, reliably realized the shaft seal problem of high temperature lubricating grease, through the combination use under double -deck welding type heat preservation mechanism, mechanical seal flushing mechanism, axial thrust mechanism, can completely realize the safe long -life pumping of high temperature lubricating grease, pulsation is low, no shear, and this method is simple, economic, continuous, is suitable for the conveying process of high temperature lubricating grease.

The application discloses a kind of end disc type screw pump vertical test device, including test screw pump and test oil tank;The top of test screw pump is equipped with test motor for driving test screw pump to run;Test oil tank is also equipped with inlet pipeline, and inlet pipeline is connected with the oil inlet of test screw pump;Inlet pipeline is equipped with inlet pipeline adjusting mechanism, which can connect inlet pipeline with oil inlet at different positions;Test oil tank is also equipped with outlet pipeline, and outlet pipeline is connected with the oil outlet of test screw pump;Outlet pipeline is also equipped with outlet pipeline adjusting mechanism, which can connect outlet pipeline with oil outlet at different positions.The application can meet the test requirements of different specifications of end disc type screw pump, so that a set of test device can quickly meet the test work of various inlet and outlet direction combination modes of different specifications of end disc type screw pump, improve efficiency, save cost, better meet the efficient output of end disc type screw pump.

The invention discloses a large-stroke adjusting device based on a screw pump and oil extraction equipment, and relates to the technical field of oil extraction equipment. The bottom end of the adjusting rod extends to the underground to be connected with a rotor of the screw pump, and transmission threads are arranged on the outer wall of the adjusting rod; the driving mechanism drives the adjusting rod to carry out oil extraction operation; the at least one adjusting block is sleeved outside the adjusting rod and is in threaded fit with the adjusting rod; the limiting assembly is used for limiting the axial movement of the adjusting block; and the locking mechanism comprises a movable locking piece. When height adjustment is carried out, the locking piece is in clamped butt joint with the adjusting block so as to limit circumferential rotation of the adjusting block, the driving mechanism drives the adjusting rod to rotate relative to the adjusting block, and therefore the adjusting rod generates axial lifting motion. According to the lifting mechanism, the adjusting rod is directly used as a thread feeding part, the physical height limitation of an existing lifting mechanism is broken through, and large-amplitude ultra-long stroke adjustment is achieved.

The invention relates to the technical field of electrolyte membrane preparation, in particular to extrusion flat plate coating equipment for preparing a solid electrolyte membrane and a preparation method.The extrusion flat plate coating equipment comprises an equipment body, and the equipment body is provided with a slurry supply unit, an extrusion coating unit, a thickness measurement control system, a multi-stage drying unit and a stripping and rolling unit; the slurry supply unit is arranged on one side of the extrusion coating unit, a screw pump of the slurry supply unit is communicated with a coating die head of the extrusion coating unit, the multi-stage drying unit is arranged on the discharging side of the extrusion coating unit, and a thickness measuring probe of the thickness measuring control system is arranged in the multi-stage drying unit. The stripping and winding unit is arranged on the discharging side of the multi-stage drying unit. Continuous, efficient and stable production of the solid electrolyte membrane can be achieved, and the prepared membrane is uniform in thickness, free of defects, high in density and excellent in mechanical performance.

The utility model provides a stator dismounting tool for a single-screw pump, relates to the technical field of screw pumps, and solves the problems that the conventional stator dismounting tool wastes time and labor, is easy to block and cannot finish the dismounting work. One end of the metal outer tube is sleeved outside a stator, the stress application lever is radially and detachably inserted at one end, far away from the stator, of the metal outer tube, and a plurality of stator fixing blocks used for clamping the stator are arranged between the inner wall of the metal outer tube and the stator. One end, close to the stator, of the peripheral wall of the metal outer pipe is in radial threaded connection with a plurality of screws used for adjusting the clamping pressure of the stator fixing block. The beneficial effects of the utility model are that the structure is simple, the operation is convenient, the stator fixation is convenient and stable, the replacement and installation work of the stator can be easily realized, the maintenance time and cost of equipment are saved, and financial resources and material resources are saved.

The application discloses a kind of screw pump well electric heating current collection converter, including upper rotary converter and spring leg structure located below rotary converter;Rotary converter inside integrated carbon brush slip ring, carbon brush slip ring is connected with the cable of current collector by slip ring terminal post to realize the column rotation of screw pump and is connected to power supply;Spring leg structure is integrated with spring and spring rod to prevent upper rotary converter from shaking.The current collection converter of the application is used to solve the problems of difficult wellbore lifting, complex ground driving equipment and other problems in screw pump well, by installing a set of current collection converter on the upper part of screw pump driving head, cooperating with hollow sucker rod for downhole electric heating, to improve the temperature of crude oil in wellbore, reduce the viscosity of crude oil, so as to ensure normal and stable production of screw pump well.

The invention provides an electric submersible screw pump rotating speed adjusting method and system considering crude oil viscosity. The method comprises the following steps: calculating the power consumption per ton of liquid per hundred meters by utilizing the working fluid level depth, the oil pressure, the casing pressure, the pump depth, the daily power consumption of a single well and the daily produced liquid; determining the maximum reasonable submergence under the predefined crude oil viscosity and the minimum reasonable submergence under the predefined viscosity according to the correlation between the data of the hectometer ton liquid power consumption and the submergence data, and drawing a block critical submergence control chart; and searching a block critical submergence control chart, and adjusting the rotating speed of the electric submersible screw pump according to whether the actual submergence is between the maximum reasonable submergence and the minimum reasonable submergence. According to the scheme provided by the invention, the comprehensive influence of the crude oil viscosity on the electric submersible screw pump, shaft flow and other systems can be considered, the critical submergence control chart is established, different submergence is recommended for oil wells with different crude oil viscosities, differential supply and production balance is realized, the overall lifting efficiency of a block is improved, and benefit development is realized.

The utility model relates to the technical field of screw pump machining related equipment, and provides a screw pump machining cutting device which comprises a rack and a stand column, the stand column is fixed to the surface of the rack, a fixing assembly is arranged on the surface of the rack, a rectangular groove is formed in the surface of the rack, and a cutting assembly is arranged in the rectangular groove. The fixing assembly comprises a pair of telescopic air cylinders, the telescopic air cylinders are both installed on the bottom face of the rack, the output ends of the telescopic air cylinders are connected with a bracket, the bottom of the bracket is provided with a pair of first movable rods, the lower ends of the first movable rods are movably sleeved with the rack, and a pair of second movable rods are movably connected with the rack in a sleeved mode. The upper end of the second movable rod is connected with a pressing frame. By means of the technical scheme, the technical problem that in the prior art, cutting equipment cannot conduct inner diameter and drilling machining on the rotor universal joint at the same time is solved.

The invention discloses a method for calculating the trafficability of an electric submersible screw pump unit. The electric submersible screw pump unit comprises a flow guide cover, a screw pump, a flexible shaft, a motor and a protector which are sequentially arranged, and the calculation method comprises the following steps that S1, the structure of the electric submersible screw pump unit is simplified, and the whole unit is formed by connecting a plurality of simplified models; s2, analyzing the trafficability condition of the electric submersible screw pump unit, and considering that the unit can be slowly and continuously tripped on the premise of not damaging the structure of the unit; s3, establishing a continuous beam analysis model; and S4, analyzing and calculating the trafficability of the electric submersible screw pump unit. The method has the beneficial effects that a calculation model based on a continuous beam structure is established by analyzing the trafficability condition of the electric submersible screw pump unit, and the trafficability of the unit is calculated by adopting the strength condition and the deformation condition, so that technical support is provided for the construction operation of tripping the electric submersible screw pump unit into the L-shaped horizontal well.