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:
Jul. 15, 2014
Filed:
Dec. 01, 2009
Joel Rondeau, Antony, FR;
Joel Rondeau, Antony, FR;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
An apparatus for use in launching cement plugs in a well cementing operation, comprising: —a cylinder () having ports () defined in a portion of the wall thereof; —a piston () slideably received in the bore of the cylinder below the ports; and —an actuator () extending from the piston through the cylinder and operable by the piston for launching a plug from the apparatus into the well; wherein the apparatus further comprises an elongate sleeve valve member located in the cylinder above the piston, the sleeve valve member () comprising at least one ball seat (-) for receiving a ball to block the interior of the cylinder, sleeve ports formed in the sleeve above the ball seat, and a spacer () extending between the ball seat and the piston.