Patent · US Active

Pump mechanism for cooling of rotary bearings in drilling tools and method of use thereof

US8408304B2 · kind B2 · utility

1Cited by

16References

17Claims

0Family size

Assignee

Baker Hughes Holdings LLC · US

Inventors

Olof Hummes · Schwelm, DE
Bernd Santelmann · Duderstadt, DE
Sven Krüger · Würzburg, DE

Key dates

Filing date	Mar 25, 2009
Grant date	Apr 2, 2013
Priority date	—
Expiry date	Sep 15, 2029

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B4/003
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A bearing for a wellbore tool includes a flow device. The flow device may be a pump such as a positive displacement pump or a hydrodynamic pump. In arrangements, a pump stator connects to a wellbore wall. A pump rotor rotates with a drilling motor, and/or a drill string. Rotation of the pump rotor may generate a pressure differential to displace the fluid. The pump may be configured to flow fluid across a gap between a rotating section and a non-rotating section of the bearing. The fluid may be drawn from a wellbore annulus and also returned into the wellbore annulus. The bearing may support thrust loadings and/or a radial loadings. In embodiments, inserts in the bearing may be used to filter the fluid.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.