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. 26, 2008
Filed:
Mar. 29, 2006
Falk W. Doering, Stafford, TX (US);
Carl J. Roy, Richmond, TX (US);
Falk W. Doering, Stafford, TX (US);
Carl J. Roy, Richmond, TX (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A radially expandable tool is provided that includes a tool body and a radially moveable member coupled to the tool body and in force receiving relation to a constant force actuator. The radially moveable member is movable by the constant force actuator from an closed position to a plurality of radially expanded open positions, which includes a fully open position. The constant force actuator includes an opening arm having a force transmission member; and a movement control guide in force reacting engagement with the force transmission member. The tool also includes a linear force generator; which applies a linear force to the constant force actuator, which the actuator transfers to a radial force perpendicular to the linear force. When the linear force is constant, the radial force transferred by the actuator is constant for each radial position of the radially moveable member from the closed position to the fully opened position due to the interaction of the force transmission member and the movement control guide.