Is a
Patent attributes
Patent Applicant
Patent Jurisdiction
Patent Number
Date of Patent
April 18, 2017
Patent Application Number
14941623
Date Filed
November 15, 2015
Patent Citations Received
Patent Primary Examiner
Patent 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.
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