Systems and methods for controlling desalting and dehydration of crude oil, one method including monitoring total dissolved solids (TDS) content at an outlet stream from a crude oil separation unit, the outlet stream comprising water; monitoring basic sediment and water (BS&W) content at an outlet stream from the crude oil separation unit, the outlet stream comprising processed crude oil; determining pounds per thousand barrels (PTB) salt content and volumetric water content of a dried, desalted crude oil product stream using the TDS content and BS&W content; and controlling a process input to the method from a comparison between the PTB salt content and volumetric water content of the dried, desalted crude oil product stream versus a maximum set value for PTB salt content and volumetric water content of the dried, desalted crude oil product stream.

Systems and methods for controlling desalting and dehydration of crude oil, one method including monitoring total dissolved solids (TDS) content at an outlet stream from a crude oil separation unit, the outlet stream comprising water; monitoring basic sediment and water (BS&W) content at an outlet stream from the crude oil separation unit, the outlet stream comprising processed crude oil; determining pounds per thousand barrels (PTB) salt content and volumetric water content of a dried, desalted crude oil product stream using the TDS content and BS&W content; and controlling a process input to the method from a comparison between the PTB salt content and volumetric water content of the dried, desalted crude oil product stream versus a maximum set value for PTB salt content and volumetric water content of the dried, desalted crude oil product stream.

A filter device may include a tank, a drainage section at a lower most end of the tank, a filter medium above the drainage section and below an upper most end of the tank, and a plurality of sensors provided on the tank. A first sensor may be configured to measure a first height of the filter medium. A second sensor and third sensor may be configured to measure a second height of fluids within the tank. Additionally, air is configured to be pumped through the filter medium during an air scouring cycle. A control system may be operational coupled to the filter device, the control system may be configured to maintain the fluids at the second height at a predetermined distance of one inch above the first height during the air scouring cycle.

A plumbing system may comprise: a fluid conduit configured to receive waste water; a first ultrasonic flow sensor coupled to the fluid conduit; a valve in fluid communication with a drain conduit, the valve configured to impede a fluid path of the plumbing system in response to being in a closed state; and a controller electronically coupled to the first ultrasonic flow sensor and the valve, the controller configured to: determine fluid is flowing through the fluid conduit in response to receiving a sensor data from the first ultrasonic flow sensor, and activate the valve based on the sensor.

A method for operating a filling system includes: determining a current valve curve of a first filling valve and a current valve curve of a second filling valve; comparing the current valve curve of the first filling valve with a reference valve curve of the first filling valve and comparing the current valve curve of the second filling valve with a reference valve curve of the second filling valve; adjusting a number of filling points at which the current valve curve differs from the associated reference valve curve; detecting and signaling a filling point error in the event of a deviation of the valve curve from the reference valve curve at one filling point; and detecting and signaling a process error in the case of deviation of the valve curve from the reference valve curve at both filling points.

A method for operating a filling system includes: determining a current valve curve of a first filling valve and a current valve curve of a second filling valve; comparing the current valve curve of the first filling valve with a reference valve curve of the first filling valve and comparing the current valve curve of the second filling valve with a reference valve curve of the second filling valve; adjusting a number of filling points at which the current valve curve differs from the associated reference valve curve; detecting and signaling a filling point error in the event of a deviation of the valve curve from the reference valve curve at one filling point; and detecting and signaling a process error in the case of deviation of the valve curve from the reference valve curve at both filling points.

A method for controlling a well pumping system is provided. The method includes the steps of entering a pump intake depth, a minimum fill preset, a maximum fill preset, and a gain value into a controller for the well pumping system, and determining a fluid over pump level. If the fluid over pump level is zero, the method calls for setting a target pump fill equal to the maximum fill preset. If the fluid over pump level is not zero, the method calls for calculating a fluid over pump ratio using the pump intake depth, and calculating the target pump fill using the fluid over pump ratio and the gain value. Further, the method includes calculating a pump fill error as the difference between the target pump fill and an actual pump fill. The method further includes controlling a pumping speed of the well pumping system based on the pump fill error.

A method for controlling a well pumping system is provided. The method includes the steps of entering a pump intake depth, a minimum fill preset, a maximum fill preset, and a gain value into a controller for the well pumping system, and determining a fluid over pump level. If the fluid over pump level is zero, the method calls for setting a target pump fill equal to the maximum fill preset. If the fluid over pump level is not zero, the method calls for calculating a fluid over pump ratio using the pump intake depth, and calculating the target pump fill using the fluid over pump ratio and the gain value. Further, the method includes calculating a pump fill error as the difference between the target pump fill and an actual pump fill. The method further includes controlling a pumping speed of the well pumping system based on the pump fill error.

A froth coalescing unit for a fluid delivery system for a fluid ejection system, the froth coalescing unit including a coalescing chamber including a sump, an inlet to receive froth into the coalescing chamber, the froth comprising a mixture of fluid and gas, the coalescing chamber to coalesce the fluid from the froth with the coalesced fluid collecting at least in the sump, an outlet to communicate coalesced fluid from the sump, and a fluid level sensor to provide a level over a range of levels of coalesced fluid in the coalescing chamber including in the sump.

A froth coalescing unit for a fluid delivery system for a fluid ejection system, the froth coalescing unit including a coalescing chamber including a sump, an inlet to receive froth into the coalescing chamber, the froth comprising a mixture of fluid and gas, the coalescing chamber to coalesce the fluid from the froth with the coalesced fluid collecting at least in the sump, an outlet to communicate coalesced fluid from the sump, and a fluid level sensor to provide a level over a range of levels of coalesced fluid in the coalescing chamber including in the sump.