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US 6,585,052 B2Granted
Casing centralizer
AssigneeTesco Corporation
InventorsPer G. Angman, Robert M. Tessari
Life of this patent
Estimating the term…
Abstract
A tubing centralizer for borehole drilling disclosed. The centralizer includes a retaining collar and an outer sleeve. In a method for installing the centralizer onto a joint of tubing, the retaining collar is mounted onto the joint of tubing and the outer sleeve is installed thereover.
Claims4
A centralizer for installing about a joint of tubing, the centralizer comprising:
- a retaining collar including an outer tapering, frustoconical outer surface and a substantially cylindrical inner surface, the retaining collar being mountable about said joint of tubing with the retaining collar's inner surface in contact with the tubing outer surface;
- and
- an outer sleeve mounted about and in frictional engagement with the retaining collar, the outer sleeve having:
- a tapering, frustoconical inner surface selected to be mateable with the outer surface of the retaining collar;
- and
- an outer surface including bearing surfaces.
3 more elements
Dependencies are inferred from the claim text.