US 12,007,264 B1
System and method for reducing gas break out in MPD metering with back pressure
Martyn Parker, Fort Smith, AR (US); and Benjamin Micah Spahn, Alma, AR (US)
Assigned to PRUITT TOOL & SUPPLY CO., Fort Smith, AR (US)
Filed by PRUITT TOOL & SUPPLY CO., Fort Smith, AR (US)
Filed on Apr. 3, 2023, as Appl. No. 18/194,973.
Application 18/194,973 is a continuation of application No. 16/927,540, filed on Jul. 13, 2020, granted, now 11,619,531.
Application 16/927,540 is a continuation of application No. 16/415,957, filed on May 17, 2019, granted, now 10,712,190, issued on Jul. 14, 2020.
Claims priority of provisional application 62/673,014, filed on May 17, 2018.
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 21/08 (2006.01); E21B 21/10 (2006.01); G01F 1/84 (2006.01); G05D 16/20 (2006.01)
CPC G01F 1/845 (2013.01) [E21B 21/08 (2013.01); E21B 21/106 (2013.01); G05D 16/2013 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A back pressure system for reducing gas break out of a drilling fluid in a flow meter installed in managed pressure drilling (MPD) metering with back pressure wherein the drilling fluid flows downstream from the flow meter to the back pressure system, the system comprising:
a first flow control device located downstream of the flow meter wherein the first flow control device is adjustable to apply back pressure on the flow meter;
a pressure regulator that sets the back pressure applied by the first flow control device, wherein the pressure regulator adjusts the first flow control device based upon a pressure measured downstream of the flow meter.