The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 1976
Filed:
Jul. 01, 1974
Yves Nicolas, Versailles, FR;
Schlumberger Technology Corporation, New York, NY (US);
Abstract
In the representative embodiment of the present invention disclosed herein, a well bore flowmeter is provided with a fluid-driven spinner which is uniquely mounted on the closed end of a hollow shaft that is coaxially disposed over a spindle and rotatably journalled thereon by one or more bearings located in the enclosed annular chamber defined between the shaft and the spindle. To protect the bearings, the chamber is filled with a lubricant and the chamber is communicated with the exterior of the flowmeter only by way of a multi-directional passage which effectively serves to block the entry of well bore debris as the flowmeter is operating. As a further protection for the bearings, one or more valve members are also preferably provided for blocking communication with the bearing chamber as the flowmeter is moved into and out of a well bore. These valve members are preferably actuated by the extension and retraction of a centralizer provided for centering the flowmeter as it is operated in a well bore.