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US 2006/0216178 A1Published application
Downhole motor seal and method
AssigneeSchlumberger Technology Corporation
InventorsOlivier Sindt, Geoff Downton, Laurent Carteron, Francois Clouzeau
Life of this patent
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Abstract
The rotor of a downhole motor includes a mandrel having at least one radial lobe, and an elastomeric tubular sleeve compressed about the mandrel so as to establish frictional engagement therebetween. The sleeve is compressed about the mandrel through one of various processes, including heat shrinking, vacuum shrinking, and stretching.
Claims28
A method for making the rotor of a progressive cavity motor, comprising the step of:
- compressing an elastomeric tubular sleeve about a mandrel having at least one radial lobe so as to establish frictional engagement between the mandrel and the tubular sleeve.
A rotor for a progressive cavity motor, comprising:
- a mandrel having at least one radial lobe;
- and
- an elastomeric tubular sleeve compressed about the mandrel so as to establish frictional engagement therebetween.
A progressive cavity motor, comprising:
- a rotor comprising
- a mandrel having at least one radial lobe;
- an elastomeric tubular sleeve compressed about the mandrel so as to establish frictional engagement therebetween;
- and
- a stator having an inner elastomeric surface.
2 more elements
Dependencies are inferred from the claim text.