Patent ID: 6419472
Filing Date: 2002-07-16
Classification: E21B,F04C

Abstract:
Gear unit for a delivery pump installed in a deep borehole having: a toothed gear unit with a pinion located on an input shaft (2) and a gear wheel engaged with the pinion, which gear wheel is located on vertical drive shaft (5) driving the delivery pump, the pinion and the gear wheel rotating in an interior partially filled with lubricating oil, and the gear unit being connected to a fluid pump acting as a brake, characterized in that the gear unit is a right-angle unit with a conical pinion gear (3) located on the input shaft (2), and a bevel gear (6) located on the output shaft (5), and that a gearwheel (10) is located on the input shaft (2), which gearwheel together with gearwheel (11) forms a gear pump having a pump chamber (15) wherein said gear pump conveys fluid in a direction opposite the operational direction of rotation of the gear unit.