Centralizer
Patent 7694733 Issued on April 13, 2010. Estimated Expiration Date: 
January 18, 2026. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 18, 2026. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3065005 3080926 3578084 Centralizer for elastomer coated blast joint Stabilizer for single or dual tube drilling Non-rotating stabilizer for earth boring and bearing therefor Method of manufacturing piston rings H001192 Field installable rod guide and method Non-rotating stabilizer and centralizer for well drilling operations InventorsAssigneeApplicationNo. 11795460 filed on 01/18/2006US Classes:166/244.1PROCESSESExaminersPrimary: Bomar, ShaneAttorney, Agent or FirmForeign Patent References
International ClassE21B 17/10AbstractA centralizer having a body with an inner surface provided with a friction-reducing slider, typically located in an annular recess on the inner surface of the body of the slider, spaced from the ends of the body. The slider can be formed separately from a body of the centralizer and subsequently attached thereto on the inner surface so that it is adapted to bear between the outer surface of the tubing to be centralized and the inner surface of the centralizer. This reduces rotational torque transmitted between the centralizer and the tubing, and assists in maneuvering of the tubular string into the desired position in the well. | |
