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. 22, 2011
Filed:
Nov. 02, 2005
David Glen Martin, Aberdeen, GB;
Roland Marcel Van Dort, Aberdeen, GB;
David Glen Martin, Aberdeen, GB;
Roland Marcel Van Dort, Aberdeen, GB;
Caledyne Limited, Aberdeen, GB;
Abstract
A safety valve for use in well bore operations, for example, in cooperation with a progressive cavity pump or rodpump. One version of a safety valve () is designed for use with upper and lower conduits in the form of upper and lower pump rod strings () located in wellbore production tubing (). The safety valve comprises a housing () having a longitudinal bore () extending therethrough; a coupling member () for coupling the upper rod string to the lower rod string, the coupling member sealably mounted within the longitudinal bore; an annular flow passage () bypassing the coupling member; and a valve sleeve () located in the annular flow passage. In use, the valve sleeve is utilised to control flow of fluid through the flow passage bypassing the coupling member.