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:
Jun. 27, 2000
Filed:
Jun. 03, 1998
Applicant:
Inventors:
Russell A Johnston, Alvin, TX (US);
Andrew J Martin, Houston, TX (US);
Assignee:
Camco International Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166324 ; 166325 ; 1663327 ; 1663328 ;
Abstract
A subsurface safety valve having a valve member with a pressure equalizing mechanism is provided. The valve member includes a bore therethrough for receiving an equalizing plug. A beam is attached to the upper surface of the valve member for transferring downward motion of a flow tube to unseat the equalizing plug, and thereby establish fluid communication through the valve member prior to the opening of the valve member. A retention member is attached to the lower surface of the valve member to upwardly bias the equalizing plug within the plug bore of the valve member.