US 9,810,038 B2
Back pressure valve
John Joseph Cocker, III, Houston, TX (US)
Assigned to Cameron International Corporation, Houston, TX (US)
Filed by Cameron International Corporation, Houston, TX (US)
Filed on Dec. 30, 2014, as Appl. No. 14/586,357.
Prior Publication US 2016/0186527 A1, Jun. 30, 2016
Int. Cl. E21B 34/02 (2006.01); E21B 33/03 (2006.01); E21B 23/01 (2006.01)
CPC E21B 34/02 (2013.01) [E21B 23/01 (2013.01); E21B 33/03 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a back pressure valve configured to mount in a mineral extraction system, wherein the back pressure valve comprises:
a body comprising a venting port coaxial with a longitudinal central axis of the body;
a plunger configured to be in sealing engagement with the body to seal the venting port; and
a lock ring disposed about the body, wherein the lock ring is configured to automatically expand radially upon removal of a tool.