System and method for reducing gas break out in MPD metering with back pressure
AssigneePruitt Tool & Supply Co.
InventorsMartyn Parker, Benjamin Micah Spahn
Life of this patent
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Abstract
A system and method of maintaining back pressure located downstream of the flow meter maintains the pressure downstream of the flow meter in relation to the surface back pressure (SBP). At least one flow control device is located downstream of the flow meter. The flow control device (the BPV) automatically maintains the downstream pressure to less than or equal to fifty percent (50%) of the surface back pressure. A pressure regulator sets the back pressure to allow for a standalone device. Additional valves allow adjustment of the back pressure and allow for pressure relief and full flow bypass.
Claims19
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.
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 control 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 sets the back pressure applied by the first flow control device to less than or equal to fifty percent (50%) of a surface back pressure upstream of the flow meter.
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;
- a bypass path that provides a path for the drilling fluid that bypasses the flow meter and the first flow control device.
Dependencies are inferred from the claim text.