"Electric Submersible Pump Controller"
Electric Submersible Pump Controller Production Automation System’s Electric Submersible Pump Controller (ESP) provides a number of features speci cally designed for operation of electric submersible pumps. The drive combines motor and pump control into a single, compact package that increases production, improves energy e ciency, and enhances the reliability of both new and existing pumping systems. Overview: Sensorless Operation models capture the thermal, Multiple Constraint Optimization The drive uses a number of unique mechanical, electrical, and hydraulic At any instant during the life of a well, methods for precisely determining behavior of the system to control the and even within a pump cycle, there is a performance parameters from models of pumping process with greater single constraint that limits production. the pumping system elements without precision than ever before. Production can be maximized without requiring downhole sensors. Sensorless compromising e ciency or reliability system variables including pump speed, Pump Speed Control by forcing the system to operate at the pump torque, uid ow, uid level, suction The drive provides a number of particular constraint limiting produc- pressure, discharge pressure, and options for manual, remote, and tion at each instant of time. Determin- di erential pressure can be observed automatic control of pump speed. ing the application limits and moving through the drive keypad/display or Speed commands can be selected smoothly between them in real time is recorded as circle charts and time-based from a number of sources including a key advantage of the PASI system. plots. Fluid level, pump ow, and total potentiometer adjustments, keypad Models of all the system elements are production are displayed in selectable presets, serial data communications, generated in real time at the well head engineering units. and internal optimization controllers. to detect appropriate limits and enforce The motor can be operated up to associated control strategies. At Sophisticated Modeling twice base speed at constant power. di erent points in the pump cycle, the Embedded mathematical models of the This helps maximize production system may be limited by maximum drive, transformer, cable, motor, casing, during periods of reduced pump motor speed, motor thermal capacity, tubing, uid, and reservoir use component loading, such as during gas power demands, gearbox maximum speci cations and well completion interference. Speed control includes torque, rod maximum load, rod fall parameters along with eld setup user-programmable starting and velocity, or pump ll. Multiple parameters to monitor pumping system running speeds or frequencies as constraint optimization is particularly operation. Identi cation routines well as adjustable acceleration and bene cial in applications with variable automatically determine deceleration ramps. The system can in ow conditions, such as those found installation-dependent system be con gured for optimization of in coal-bed methane, high gas/oil parameters including those of the uid production, gas production, ration, and thermally stimulated wells. transformer, cable, motor, and pump. The energy e ciency, and/or power ow. Electric Submersible Pump Controller Production Optimization Fluid Level Monitors Pro bus, and Ethernet. Optional software is Level control maximizes uid production by A uid level monitor provides a continuous available for monitoring the pumping regulating the downhole pump inlet estimate of level from pump head, uid system using Palm-type handheld devices pressure. A search routine uses an optional properties, tubing pressure, and casing and Windows based personal computers gas ow sensor input to automatically pressure. Tubing and casing pressures or network servers. A wireless interface option select the uid level that maximizes gas can be entered as parameters for relatively allows remote monitoring of system production in coal-bed methane pumping xed pressures or input from analog performance and control of pump operation. applications. Current limit control increases sensors for signi cantly variable pressures. User-programmable reports can be production by raising motor speed generated using software that connects during periods of reduced pump load. A System Protection system parameters to Excel spreadsheets. power ow optimizer maximizes production Torque limiting protects the motor and pump from gassy wells by allowing the drive and from excessive torque loads. Low motor to operate at their maximum speed detection protects the system in case thermal capacities. of a stall condition, such as a stuck pump or blocked ow-line. Low torque Pump O Control detection indicates a plugged sand screen. Pump-o control maximizes well production for any given in ow characteristic. Automatic Restart Fluid level over the pump intake is precisely The drive can automatically recover from fault controlled by di erential sensing of conditions and intermittent power casing gas and pump intake pressure. A outages to ensue continuous operation of pump-o control allows the pump to dwell unattended wells. Auto restart control for a programmable period of time to protect sequences starting of multiple pumps after the pump and to control average ow. power outages to eliminate surges in A dwell period minimum pump speed can be power demand. Start/stop events are used to prevent sanding in the well. automatically logged for subsequent retrieval. Energy Savings A power ow optimizer reduces the electric Data Capture utility cost for any in ow rate. A cyclic A data sampler captures real-time informa- energy optimizer provides additional utility tion for generation of motor and pump cost reduction by pumping at the performance charts as well as plots of maximum e ciency point necessary to production information. A data logger achieve required ow. Time of use control collects time-stamped fault, warning, and can be used to minimize on-peak energy event logs that can be viewed through the demand charges. The drive incorporates drive keypad/display uploaded to a personal an input power meter as well as displays of computer, or retrieved by a network input power, motor power, pump server. Typical events include start, stop, power, and average e ciency to aid in utility mode change, power up, power loss, cost control. overvoltage, overcurrent, low torque, and low speed. A multichannel analog Producion Monitors interface option allows data logging of A pump ow monitor provides a continuous additional well parameters. estimate of ow without the need for additional instrumentation. Pumping speed Data Communications and pump e ective volume are used to Several industry standard serial protocols are estimate the actual production rate. Pump available for communicating with ow is totaled in a resettable production popular programmable controllers as well as accumulator. Estimated well production is personal computers or network displayed for the operator and is available servers. Available protocols include ANSI, for remote well monitoring through a serial Modbus RTU, Modbus Plus, ControlNet, communication port. Production Automation Systems, Inc. 1117 Woodford Court Edmond, OK 73034 Phone: 405-315-8807 / 405-397-9166 Email: email@example.com URL: www.pasius.com