ESP
Electrical Submersible Pump Systems

Western Submersible Pump (WSP)
WSP designs, builds, and services the full range of Electric Submersible Pump (ESP) system components. To insure that our equipment maintains consistently high quality, WSP operates its manufacture and repair facilities under ISO 9001:2000 certification.

WSP Centrifugal Pump
WSP’ submergible pumps are multi-stage centrifugal pumps. Each stage consists of a rotating impeller and a stationary diffuser. Stage materials are Ni-Resist or special metallurgy’s for dependable performance in wells with corrosion or abrasive environments.

WSP’s multi-stage centrifugal pumps in either radial or mixed flow configuration are designed to lift a full range of volumes of oil, water or brine over the life of a well with a minimum of repair and downtime.

Corrosion resistant K-Monel shafts are standard on all WSP pumps. Optional high-strength Inconel shafts are available for high load applications. Corrosion resistant coatings and ferritic steel construction are available for protection in wellbores containing Hydrogen Sulfide, Carbon Dioxide or other similar corrosive environments.

For wells containing abrasives (sand) or where maximum run life is required, WSP provides a full range of performance enhancing options. WSP manufactures both radially stabilized floater and compression pump designs. These designs incorporate hardened materials such as tungsten carbide in the bearing surface areas. Additional radial support is provided by stage bearings which are situated strategically throughout the pump section to provide optimal shaft stability and enhanced run life.

WSP Intakes and Gas Separators
Fluid enters the pump through a standard screen intake or a gas separator. WSP offers a variety of intakes and gas separators serving a broad range of well conditions. WSP intakes and gas separators are designed to operate efficiently for long periods of time under both abrasive and corrosive pumping conditions.
The abrasive resistant material, Tungsten Carbide, is utilized in the bearings and sleeves of all WSP intakes and gas separators.

For corrosive wells WSP offers intakes and gas separators constructed of ferritic steel.

In order to maximize run life, WSP offers gas separators in both a two bearing and a three bearing configuration. These separators when used in conjunction with ferritic steel construction greatly enhance overall performance in abrasive and corrosive wellbore environments.

WSP also offers the Pro Max Gas Processing Unit (GPU) for gassy wells having up to 45% gas volume factor (GVF) at low intake pressures. The WSP Pro-Max GPU is designed to install directly below a center tandem multi-stage WSP pump and effectively reduces the size of the gas vapor bubbles and compresses them back into solution facilitating their production through the electrical submersible pump without gas locking. It can also be installed above one or two WSP rotary gas separators to facilitate the production of extremely gassy wells.

WSP ProSeals
The WSP ProSeal prevents well fluids from entering the motor, allows motor oil expansion and contraction, equalizes internal motor pressure with the wellbore pressure, and absorbs pump axial shaft thrust.
The proven technologies of both the labyrinth and positive seal elastomer bag are featured in WSP ProSeals. ProSeals contain multiple redundant separation chambers in either a labyrinth, bag or combination design to maximize system run life.
WSP bag type ProSeals utilizes the bag as an elastomer barrier which physically isolates the motor from the well fluid. This type of ProSeal will function well in deviated wells and in the presence of very light well fluids.
WSP ProSeals come with a variety of performance enhancing options. High load bearings and high strength shafts are available for high horsepower and high head applications. WSP has a selection of elastomers to meet all downhole conditions. Corrosion protection is provided with flame spray coatings or ferritic steel construction.

WSP Three Phase Electric Motor
The three phase, two pole induction motor connects to the bottom of the seal section.
The motor may be a single motor or may be made up of two or more motors bolted together in tandem, depending on the HP required to obtain the necessary lift.
All motors are filled with refined mineral based or synthetic oil that withstands high temperatures, provides dielectric strength, lubrication for the bearings and provides thermal conductivity.
Motors are hand wound by skilled WSP technicians with the latest techniques. Primary insulation in WSP’s standard motor is provided by Kapton insulated magnet wire which is suitable for temperatures up to 325ºF/162ºC. Proprietary insulation materials are also available for applications where higher temperature ratings are required. Resistance to exterior corrosion is provided by flame spray coatings or ferritic steel construction.

Motor Base or Downhole Monitor
The bottom of the motor may have a bolt on universal base or a downhole sensing device or monitor. The WSP Downhole Monitor (DHM) bolts directly to the bottom of an upper or center tandem motor, with telemetry obtained through the power cable. No special connections or additional signal wires are required. The WSP DHM is a robust choke design with ground fault protection built in. Installation of a DHM ensures maximum run life while enabling the operator to optimize production by automatic or remote control.  It safeguards the ESP system with built in alarms and trips, protecting your pump and well against deadheading or shut-in, high or low flow rates, excessive well drawdown, motor heating and resonant vibration frequencies.