A fluid metering system for accurately measuring and dosing one or more fluids. The fluid metering system generally includes a closed loop feedback system that monitors the volume of liquid chemical input into a system over a period of time. Based on the measured amount of chemical input into a system over a period of time, the system calculates whether or not an adjustment is required for the next input of chemical. The various embodiments utilize a measuring tube that is filled with a liquid chemical. A pressure sensor measures the pressure of the chemical in the measuring tube when filled and after emptied to calculate the total volume of chemical input into the system.

A fluid dispensing system includes a pump, a valve, and a dispenser disposed downstream of the valve and connected to the valve with a hose. To provide a steady flow rate at the dispenser, the pump charges the fluid to or above the pressure required to achieve a desired flow rate. The valve cycles between open and closed at a fixed frequency. The valve-open time is varied within that frequency to maintain the desired flow rate.

A system includes a variable displacement pump (VDP) in fluid communication with an inlet line and with an outlet line. A bypass valve (BPV) includes a BPV inlet in fluid communication with the outlet line, and a BPV outlet in fluid communication with a bypass line that feeds into the inlet line upstream of the VDP. An actuator is operatively connected to control the BPV to vary flow from the BPV inlet to the bypass line. A flow sensing valve (FSV) is connected in the outlet line. The FSV includes a sensor configured to generate sensor data indicative of flow out of the outlet line. A controller operatively connected to the actuator to control recirculation flow passed through the BPV based on the sensor data and based on a predetermined low threshold of flow through the VDP.

The present invention provides a water-based coating and/or coating system that can be used to form sag resistant wet layers or coatings on a wide range of substrates. The coating system is particularly effective for protecting metal-containing substrates, such as intermodal cargo containers, against corrosion. As an overview, the present invention provides water-based compositions suitable to form primer coats on substrates. Desirably, the primer incorporates a high level of one or more CAS agents for excellent sag resistance while drying in a broad range of relative humidity environments. Alternatively, modifications can be made to control temperature and humidity during spray application and drying as a way to increase sag resistance of the coating.

A method for controlling a managed pressure drilling system including a drillstring located in a borehole, a pump that delivers drilling fluid, and a choke that controls the flow of the drilling fluid from an annulus formed between the drillstring and the wall of the borehole. During drilling, the drilling fluid flows downwardly through the drillstring from the pump and through a drill bit, and returns through the annulus to the choke. The method includes determining a correction V.sub.corr in the volume of the fluid in the annulus to achieve a target pressure in the fluid; calculating a choke flow rate correction term q.sub.corr by dividing V.sub.corr by a factor related to the acoustic travel time t.sub.a of a pressure wave in the fluid travelling the length of the annulus; and determining a flow demand from the choke on the basis of the flow rate correction term q.sub.corr.

A method is disclosed comprising drawing air into a robotic vapor device, exposing the drawn air to a sensor to detect one or more constituents in the drawn air, determining measurement data for the one or more constituents of the drawn air via the sensor, and engaging a filtration component in the robotic vapor device based on the measurement data.

A method is disclosed comprising drawing air into a robotic vapor device, exposing the drawn air to a sensor to detect one or more constituents in the drawn air, determining measurement data for the one or more constituents of the drawn air via the sensor, and engaging a filtration component in the robotic vapor device based on the measurement data.

A processor may receive an input dataset. The input dataset may include a plurality of waterpipe components and one or more performance factors of the waterpipe system. A processor may generate a digital twin of the waterpipe system using the input dataset. A processor may simulate, using the digital twin, one or more features of the waterpipe system. The simulating may include a forecast having one or more predicted conditions associated with the waterpipe system.

A technique for remote pairing of pumps and manifold valves at an oilfield. The technique takes advantage of a control unit having remote capability of opening and closing manifold valves. The control unit may also be in simultaneous communication with an individual sensor for each pump. Thus, unique protocols of valve opening and closing at the manifold in conjunction with monitoring of fluid-based detections by the unit may be used to establish pairing between specific pumps and manifold valves. Similarly, the system may also be inspected for leaks at particular locations through unique valve opening and closing sequences in conjunction with fluid monitoring.

A method of servicing a request during high pressure wellsite pumping operations to manipulate a valve in a manifold system having a plurality of valves includes receiving a plurality of valve configurations that would result in an overpressured manifold system and comparing the request to a proposed valve configuration that would result from a proposed valve manipulation. The method includes determining whether a pump to the manifold system is operating. The method further includes determining whether the proposed valve manipulation inhibits a flow path between the pump and an outlet of the manifold system and would result in an overpressured manifold system. The method also includes in response to a determination that the proposed valve manipulation inhibits the flow path: blocking the proposed valve manipulation and presenting an operator with an override option.