14 results about "Progressive cavity pump" patented technology

The invention discloses an inclined screw pump for conveying a viscous corrosive medium, and belongs to the field of conveying pumps. Comprising a pump body, a hopper, a feeding assembly, a pre-leading-in pipeline, a rotor and a stator, the feeding assembly is composed of an arch breaking unit, a propelling unit and a pre-pressing leading-in unit, the arch breaking unit breaks a hopper material arch, the propelling unit achieves stable feeding through a main spiral and a reverse auxiliary spiral, the pre-pressing leading-in unit guides materials into a pump body suction inlet, the rotor is a single-head spiral, and the stator is a stator. A screw pitch transition section is arranged between the inlet section and the outlet section, the outer surface is wear-resistant and corrosion-resistant, and the stator is of an eccentric spiral cavity structure and comprises a first stator metal framework ceramic lining and a second stator fluoropolymer lining. Through structural optimization of the feeding assembly, the rotor and the stator, low-shear, high-abrasion-resistance, high-corrosion-resistance and controllable-flow conveying is achieved, the problems that high-viscosity corrosive media are difficult to feed, shear damage is caused and a pump body is abraded are effectively solved, and the high-shear-resistance and high-corrosion-resistance pump is suitable for the precise coating and glue injection process of a new energy lithium ion battery production line.

A system includes an electric submersible progressive cavity pump (ESPCP). The ESPCP includes a stator having an internal bore, and a hollow rotor disposed in the internal bore of the stator, where the hollow rotor is configured to rotate within the internal bore to pump a fluid via a plurality of progressive cavities.

The invention discloses a method for measuring the gas content in a die casting, and belongs to the technical field of material detection. The method comprises the following steps: loading a sample into the closed desorption cavity; vacuumizing and pre-degassing the cavity by using an oil-free high-vacuum acquisition module formed by connecting a molecular pump and a dry-type screw pump in series; stepwise heating is carried out on the sample through program temperature control; the released gas is guided into a differential pressure sensing metering unit through a low-thermal-conductivity aluminum oxide ceramic isolation tube; the unit comprises a reference cavity and a measuring cavity which are arranged in the same constant temperature device, and the gas inflow rate is dynamically represented by measuring the pressure difference between the two cavities; and based on the ideal gas state equation and a calculation model containing cavity thermal expansion compensation, calculating the amount of the gas substance in unit time in real time. The problems of poor precision and repeatability caused by oil pollution, thermal interference and discontinuous metering are solved, and continuous, dynamic and high-repeatability automatic measurement of the gas content in the die casting is realized.

The invention belongs to the field of oil exploitation, and discloses an electric submersible screw pump lifting device and a using method thereof. Comprising an underground electric submersible screw pump unit A and an underground electric submersible screw pump unit B which are arranged up and down, and the underground electric submersible screw pump unit A and the underground electric submersible screw pump unit B are arranged in a casing pipe; and a packer is arranged between the underground electric submersible screw pump unit A and the underground electric submersible screw pump unit B and is used for separating oil sleeve annuluses of the upper unit and the lower unit. By arranging the packers and the screen pipes, the two sets of submersible screw pumps can operate safely, underground relay of lifting of the deep well rodless pump is achieved, the screw pumps can be applied to the deep well, the application range of the electric submersible screw pumps is widened, and the oil yield is increased.

The invention relates to a well fluid extraction system using a progressive cavity pump; comprising a stator, a rotor; a rotating drive rod, and a drive motor; the rotor is installed in the stator and has an external threaded curve surface; and the rotating rod is connected to the rotor; the drive motor, a fluid outlet of the progressive cavity pump is connected to an input end of a tank or a fluid pipeline; a fluid inlet immersed in a reservoir in the production zone of a well including a well head and a well casing; at least one torque sensor; which measures the torque of the rotating rod in a non-contact way, and includes a sensor housing supported by a mounting assembly adapted to be connected to the well head or well casing and comprising at least one elongate axially orientated support for the sensor housing.

A filling device (100) for filling an accumulator cell (500) with an electrolyte (E), comprising an eccentric screw pump (200) for metering the electrolyte (E), and a filling adapter (300) connected to the eccentric screw pump (200), which can be docked to the accumulator cell (500) for filling the accumulator cell (500) with the electrolyte (E) metered by the eccentric screw pump (200), wherein the filling adapter (300) has a switchable filling valve (312), an evacuation port (333) and a docking unit (323) for docking the filling adapter (300) to the accumulator cell (500), and wherein the filling adapter (300) can be docked to the accumulator cell (500) by means of a linear displacement of the docking unit (323) relative to the filling valve (312). an evacuation state (Z1) for evacuating the accumulator cell (500) using the evacuation port (333) into a filling state (Z2) for filling the accumulator cell (500) with the electrolyte (E) and vice versa.

An apparatus includes a proximal shaft configured to mechanically couple to a motor, a first universal joint, a middle shaft coupled to the proximal shaft via the first universal joint, a housing having a bore, a second universal joint within the bore, a distal shaft coupled to the middle shaft via the second universal joint, and a connector disposed over the distal shaft. The bore limits a downward tilt of the distal shaft such that, as a rotor approaches the distal shaft, the distal shaft becomes axially aligned with the rotor by virtue of the proximal end of the rotor entering the connector or vice versa. A spring connected proximally to the connector and distally to the second universal joint is configured to decompress, thereby reversibly coupling the connector to the proximal end of the rotor, upon the motor rotationally aligning the connector with the proximal end of the rotor.

The application discloses an electric submersible screw pump energy consumption control method and device, and a medium, and relates to the technical field of oil well production control. The method comprises the following steps: measuring the pressure in the well in real time based on the downhole sensor of the electric submersible screw pump, so as to obtain the measured value of the current liquid level depth, and comparing the measured value of the liquid level depth with a preset target liquid level depth, so as to obtain a liquid level deviation value; if the absolute value of the liquid level deviation value is less than or equal to a preset deviation threshold value, a periodic speed disturbance signal is superimposed on the basic speed of the motor of the electric submersible screw pump, so as to generate periodic fluctuations, and the liquid level depth response data is continuously collected; the response rate of the liquid level depth to the speed disturbance signal is analyzed based on the response data, and it is judged whether the speed of the motor of the electric submersible screw pump is in an optimal energy consumption interval under the current liquid supply capacity; if the speed of the motor of the electric submersible screw pump is not in the optimal energy consumption interval, the speed adjustment amount is calculated based on the response rate, and the basic speed is adjusted until the speed of the motor of the electric submersible screw pump reaches the optimal energy consumption interval.

Well fluid extraction system using a progressive cavity pump 7 with a stator (8, fig.2), rotor 9, drive rod 3 and drive motor 6. The rotor installed in the stator has an external helical curved surfa

The invention relates to a stator (3; 103) for a progressive cavity pump (1), comprising a stator body (15; 115) with a shell (19; 119) and an elastic inner lining (21; 121) with which the shell is provided. According to a first aspect, the shell and the inner lining are each made of a thermoplastic polymer material. According to a second aspect, the shell is made of a thermoplastic polymer material, the inner lining is made of a material with elastomer-like properties, and the stator body is manufactured in a two-component injection molding process or in a casting process with at least two stages. According to a third aspect, the shell has at least a section of a helical outer surface (31; 131) which is modified in certain areas by at least additional demolding surfaces (36; 136).Furthermore, according to a fourth aspect, a stator (3; 103) for a progressing cavity pump (1) is proposed, comprising an inner component or lining (21; 121) designed to interact with a rotor (4) of the progressing cavity pump (1) and made of a thermoplastic elastomer or a thermoplastic polyurethane. A progressing cavity pump and a method for manufacturing a stator for a progressing cavity pump are also proposed.

The invention discloses an electric submersible screw pump temperature control method and device for a heavy oil well and a medium. The method comprises the steps that pressure data of downhole fluid of an electric submersible screw pump and current data of a downhole motor of the electric submersible screw pump are periodically collected; performing pressure feature recognition on the liquid supply state corresponding to the electric submersible screw pump to determine a first feed-forward compensation control signal; according to the current data, carrying out load characteristic identification on the electric submersible screw pump so as to determine a second feedforward compensation control signal; based on the real-time temperature data, the rotating speed of the motor is subjected to partition feedback correction, so that a first electric submersible screw pump rotating speed control signal is obtained; and performing feedforward compensation on the first electric submersible screw pump rotating speed control signal based on the first feedforward compensation control signal and / or the second feedforward compensation control signal to obtain a second electric submersible screw pump rotating speed control signal. By means of the method, the technical problem that an existing control method for the rotating speed of the motor of the heavy oil underground electric submersible screw pump cannot meet the requirement for dynamic balance of motor heat dissipation and output is solved.

In one exemplary mode, a system includes a progressive cavity pump (PCP) comprising a housing, a rotor, a stator, and ports, one port being configured to be connected to an irrigation reservoir, an ablation catheter comprising at least one ablation electrode, at least one irrigation hole, and an irrigation channel having a distal end connected to the irrigation hole(s), and a proximal end configured to be connected to another port of the PCP, a motor comprising a drive shaft which is configured to be connected to the PCP, and drive rotation of, the rotor of the progressive cavity pump, and a controller configured to control a rotatory speed of the motor to control a flow rate of the PCP so as to pump irrigation fluid from the irrigation reservoir into the irrigation channel and out of the irrigation hole(s) of the ablation catheter.

A progressive cavity pump system including a pump string disposed in a wellbore. The pump string includes a progressive cavity pump and a rod string, wherein the rod string is rotatable about a rod string axis to rotate a rotor of the progressive cavity pump. The progressive cavity pump system includes a permanent magnetic motor (“PMM”) configured to drive the rotation of the rod string. The PMM is oriented such that a drive shaft of the PMM rotates about a drive shaft axis that is not coaxial with the rod string axis.

An electric submersible progressive cavity pump (ESPCP) system may include a vortex gas separator assembly (VGSA), comprising a head comprising holes for inserting pin for installation, grooves disposed at both ends for the pin installation, a stator having an internal bore, and a rotor disposed in the internal bore of the stator. The ESPCP system may comprise a flexible shaft unit (FSU) between the VGSA and the ESPCP.