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:
Feb. 03, 1981
Filed:
Jul. 02, 1979
William G Boyle, Dallas, TX (US);
Otis Engineering Corporation, Dallas, TX (US);
Abstract
A 'feeler' type caliper for through the flow line (TFL) use in wells for indicating and recording maximum radius within the well flow conductor. The caliper has an improved arrangement of feelers and springs for centering the caliper within the well flow conductor and is articulated to pass through a five-foot radius loop. The caliper comprises a drive mechanism housing a plurality of drive wheels which track the inside of the tubing in a helical path; a sensing mechanism housing a plurality of spring loaded feeler arms which, when the caliper travels upward in the well flow conductor, are in a biased touching relation to the bore wall of the well flow conductor, each being free to be urged outwardly into recesses in the bore wall of the well flow conductor, such outward travel being sensed in a recording mechanism, the recording mechanism being operated by said drive mechanism to record maximum inside radius of the well flow conductor, versus distance traveled along the well flow conductor.