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:
Dec. 22, 2015
Filed:
Apr. 15, 2013
Applicant:
Tejas Research and Engineering, Llc, The Woodlands, TX (US);
Inventors:
Thomas G. Hill, Jr., Conroe, TX (US);
Robert C. Henschel, The Woodlands, TX (US);
Assignee:
Tejas Research and Engineering, LLC, The Woodlands, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 34/00 (2006.01); E21B 34/10 (2006.01);
U.S. Cl.
CPC ...
E21B 34/10 (2013.01); E21B 34/102 (2013.01);
Abstract
A wireline retrievable injection valve for an oil or gas well has an internal valve that is initially moved to open a flapper safety valve and also opens to allow fluid flow through the valve. The internal valve includes a sleeve that opens the flapper safety valve and shields the flapper safety valve from fluid. In this manner the flapper valve is protected from being caused to 'flutter' or 'chatter' due to pressure variations in the fluid flow, thereby damaging the seat.