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:
Aug. 26, 2008
Filed:
Mar. 31, 2004
George Telfer, Aberdeen, GB;
Edward Docherty Scott, Cardenden, GB;
Rae Andrew Youngor, Aberdeenshire, GB;
James Edward Atkins, Aberdeen, GB;
George Telfer, Aberdeen, GB;
Edward Docherty Scott, Cardenden, GB;
Rae Andrew Youngor, Aberdeenshire, GB;
James Edward Atkins, Aberdeen, GB;
Specialised Petroleum Services Group Limited, Westhill Aberdeen, GB;
Abstract
A downhole tool which can perform a task in a well bore, such as circulating fluid radially from the tool. The function is selectively performed by virtue of a sleeve moving within a central bore of the tool. Movement of the sleeve is effected by dropping a ball through a ball seat on the sleeve. Movement of the sleeve is controlled by an index sleeve such that the tool can be cycled back to the first operating position by dropping identical balls through the sleeve. Embodiments are described wherein the balls are deformable, the seat is deformable and the seat provides a helical channel through which the ball passes.