Time for Changes in Oil Production


R7 - The electro-hydraulic downhole pump drive


Description of functions

The electro-hydraulic downhole pump drive R7 from Rexroth is built up of a hydraulic cylinder mounted directly on the well head tubing and a hydraulic power unit (HPU). The HPU consists of an axial piston unit (A), e-motor (E) with integrated flywheel (S) and system control (AS). The upward and downward movement of the downhole pump produces the crude oil from the well. The drive system is CE-approved and meets the safety requirements of the machinery directive 2006/42/EC. The cylinder and the mounting frame are in compliance with Atec equipment directive 94/9/EC.


Customer benefits

With the hydraulically driven crude oil pump R7 Bosch Rexroth provides an advance technology to the mechanical crude oil pump.

  • Simple installation on site
  • Long durability
  • Direct output of the operating data (dynagram)
  • Remote control of the crude oil pump
  • Higher productivity

Technical information of running R7 system at Wintershall in Landau/Germany

  • Stroke of 1,900 mm
  • Dynamic force of 67 kN
  • Nodding pump in 1500 m depth