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:
Apr. 22, 2008
Filed:
Feb. 03, 2006
James H. Kritzler, Pearland, TX (US);
James H. Holt, Conroe, TX (US);
Vic Randazzo, Houston, TX (US);
Walt R. Chapman, Kingwood, TX (US);
James H. Kritzler, Pearland, TX (US);
James H. Holt, Conroe, TX (US);
Vic Randazzo, Houston, TX (US);
Walt R. Chapman, Kingwood, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
Gas lift valve designs and gas lift systems are described that feature a positive closure mechanism that is highly resistant to significant wear or damage that would result in fluid leakage. A pivotable flapper member is incorporated into a gas lift valve and used as a flow control mechanism. The flapper member provides a positive barrier to fluid flow from the production tubing to the annulus, even after substantial wear or damage.