加拿大潜油螺杆泵

APPLICATIONS■Progressing cavity pump (PCP) wells■High dogleg severity (DLS) wells suit-able for PCPs■Wells with restrictions of rod ortubing wear or wax problems■Offshore heavy oil wellsBENEFITS■Eliminate restrictions to running PCPin wellbore with high DLS■Reduce all PCP failures caused byrod string and tubing wear■Decrease torque and pressure lossesin relation to high-viscosity fluid■Reduce torque by 20–60% with theelimination of rod string■Improve overall efficiency■Reduce power consumption■Increase safety without having rodbackspin on the surface■Avoid leakage at surface withouthaving a stuffing box■Lower wellsite maintenance cost■Minimize noise disturbanceFEATURES■Permanent magnet motor (PMM)based downhole drive■Broad range of PCP speed from50–500 rpm■Constant torque in the entire rangeof speed■PMM applicable control panel inNEMA4 enclosure■Completion and various componentsare compatible with conventional ESP■Canadian standards association(CSA) and underwriters laboratories(UL) certified The most typical PCP failure occurs from sucker rod or tubing wear. The severity of wear is determined by various factors such as DLS, water cut, and sand cut. The wear is especially high for deviated and horizontal wells. KUDU Rodless PCP* eliminates all rod failures, resulting in a 30–50% decrease in system failure rates. This technol-ogy also allows for pump installations in a high DLS or horizontal section of the well.Rodless PCP components A low-speed downhole PMM drive and a PCP are capable of working together in challenging PCP wells without being limited by deviation profile. Every component of a KUDU Rodless PCP is selected based on well conditions and the customer’s operational parameters, such as production target rate. All other system components are selected dependent on the PCP and motor combination.KUDU Rodless PCP.Rodless PCP Progressing cavity pump combined with submersible electrical motor for artificial lift solutionsPMM technology PMM downhole drive is a proven technology that has been used with regular ESPs for many years and in PCP applications since 2003. A synchronous machine incorporating rare earth magnets in its rotor design, a PMM provides the following benefits: ■improve efficiency due to low power loss in the rotor ■increase power density with a shorter motor ■enhance dynamic performance by providing a variable frequency drive (VFD) specifically designed for PMM.By adopting a low-speed PMM, KUDU Rodless PCP provides constant torque in the entire PCP speed zone, ranging from 50 rpm to 500 rpm. Such system flexibility enables easy adjust-ment to a broad range of well production rates without replacing the pump. The downhole assembly is effective in high temperatures of up to 300 degF (150 degC) and is corrosion resistant with special coating.KUDU Rodless PCP Specifications Production rate †, bbl/d [m 3/d]12–1,900 [2–300]Maximum setting vertical depth, ft [m]6,500 [2,000]Maximum downhole temperature ‡, degF [degC]300 [150]Operational speed range, rpm 50–500Maximum power capacity, hp [kW]60 [45]Power supply requirements, V [Hz]Three-phase 380–480 [50–60]Maximum pump axial load, lbs [kg]13,200 [6,000]Minimum casing size, in [mm] 5.5 [139.7]†Based on pump model, fluid level, and pump setting depth.‡ Maximum temperature for PMM.Real-time downhole monitoring system Applying downhole telemetry, KUDU Rodless PCP prevents pumpoff conditions, monitors equipment performance, and optimizes well production. The system includes a multisensor downhole gauge package completed with a digital well monitoring system. The downhole sensors are connected to the PMM base, and the surface interface box is mounted inside the control panel. The unit also utilizes a power cable to receive signals from the downhole tool. The signals are interpreted by a data acquisition system on the surface and then sent to the VFD for monitor-ing, control, and recording. The system is able to provide the following measurements: intake pressure intake temperature motor winding temperature vibration pump discharge pressure (optional).PMM-specific control panel KUDU Rodless PCP utilizes a specially designed control panel which works with the down-hole motor as one unit without costly step-up transformers. The control panel has a built-in NEMA4 enclosure and offers a number of critical features, including: dynamic backspin brake multiple speed controls data logging and storage programmable digital and analog inputs or outputs remote communication options data management software.Tubing drain PCP Rotor connection coupling Flexible shaft Motor lead extension Pump intake Permanent magnet moter Motor centralizer Supporting unit Motor protector Permanent downhole sensors。