The invention comprises a main and a subsequent stage. At the main stage, the medium is pumped into a first instrument line. This first instrument line is mounted in a main pipeline system and is equipped with an inlet mass meter with a first flow rate range. After reaching of a set value from the instruments, an automated control system (ACS) stops the first line pump, ensures operation of its driving isolation valves, thus, completing the main stage measurement cycle, and switches the system into the subsequent stage mode. At the subsequent stage, the medium flow is collected from the tank and cavities of the measuring system. It flows by gravity into the bottom of the system inner volume (9) and is then supplied by a to a second instrument line equipped by a mass meter with a second and lower flow rate range.

The on-site monitoring device may include a monitoring unit having at least one piece of clothing intended to be worn by the operator, who may be provided with sensors to measure values of parameters linked to the operator and/or to their environment and a transmission connection to communicate with a local monitoring unit mounted on the hydrocleaner. The local monitoring unit may be able to communicate with a control unit of a control station located at a distance from the worksite in such a way as to make it possible to remotely monitor the operator and the hydrocleaner.

Apparatus and associated methods relate to an airfoil configured to be disposed at a distal end of a tank. In an illustrative example, the airfoil may be configured such that, when the tank travels at a predetermined minimum speed in a proximal direction substantially parallel to a longitudinal axis of the tank, the airfoil coalesces off-coming air from the tank and distally repositions a low-pressure region downstream of the tank below a plane horizontal to the longitudinal axis. The region may be distally displaced, for example, by at least one of a length scale of the tank. A cross-section of the tank may, for example, define a substantially conic section. A span of the wing may, for example, be orthogonal to the longitudinal axis. The wing may, for example, be below an upper surface of the tank. Various embodiments may advantageously reduce turbulence in the wake of the tank.

A vehicle includes at least one hose extending from the vehicle and configured to extend below ground through a manhole, and a light system. The light system includes a storage member, such as a retractable reel, coupled to the vehicle, a flexible line wrapped at least partially around the storage member, and a light source coupled to the flexible line. The storage member is adapted to selectively extend and retract the light source together with the hose below ground, and the light source is storable on the vehicle adjacent the storage member. The light source has a self-contained power source. In some systems, the flexible line and/or the light source are removable from the vehicle so they can be moved to a remote location from the vehicle.

A multiple tank acid mixing and delivery system for receiving and managing a plurality of fluids and mixing a final acid mixture for use in hydraulic fracturing process. The multiple tank acid mixing and delivery system comprises a support frame, a mix tank, an acid tank, a plumbing system, a control system, and a water manifold, a main connection manifold.

An aerodynamic wrap for use with a tank trailer illustratively includes opposing first and second side assemblies. In an illustrative embodiment, each side assembly includes an upper panel pivotably supported by the tank trailer, and a lower panel pivotably supported by the upper panel. A lower connecting member illustratively couples the lower panels of the first and second side assemblies under the belly of the tank trailer.

An alternative bottom drop and straight tee discharge from bulk tank conveying granular material, the tee having extensions for the automatic and manual operations of a disc valve, pivotally located within the horizontal section of the tee, during functioning. The disc valve may be manually operated, or pivoted through motorized operations, to allow for the alternative flow of bulk material from the vehicle hopper. The disc valve has an annular disc, integrally formed with upright supports, that are bearing mounted by shafts to the sidewalls of the structured tee.

A deployable safety zone system includes at least a first arm mounted on a support member and being movable between stored and operating positions relative to the support member. The support member and first arm define a safety zone between then when the first arm is in the operating position. The safety system may include reflective mechanisms, light sources, and an alarming system. The alarming system may include a transmitter positioned on one part of the safety system, a receiver positioned on another part of the safety system and an alarm mechanism. A signal may be sent between the transmitter and receiver and if that signal is interrupted, a visual or audible alarm may be generated. Alternatively, the deployable safety zone system may comprise a sensor assembly disposed adjacent the support member. The alarmed safety zone is defined between the support member and the sensor assembly.

A deployable safety zone system includes at least a first arm mounted on a support member and being movable between stored and operating positions relative to the support member. The support member and first arm define a safety zone between then when the first arm is in the operating position. The safety system may include reflective mechanisms, light sources, and an alarming system. The alarming system may include a transmitter positioned on one part of the safety system, a receiver positioned on another part of the safety system and an alarm mechanism. A signal may be sent between the transmitter and receiver and if that signal is interrupted, a visual or audible alarm may be generated. Alternatively, the deployable safety zone system may comprise a sensor assembly disposed adjacent the support member. The alarmed safety zone is defined between the support member and the sensor assembly.

A deployable safety zone system includes at least a first arm mounted on a support member and being movable between stored and operating positions relative to the support member. The support member and first arm define a safety zone between then when the first arm is in the operating position. The safety system may include reflective mechanisms, light sources, and an alarming system. The alarming system may include a transmitter positioned on one part of the safety system, a receiver positioned on another part of the safety system and an alarm mechanism. A signal may be sent between the transmitter and receiver and if that signal is interrupted, a visual or audible alarm may be generated. Alternatively, the deployable safety zone system may comprise a sensor assembly disposed adjacent the support member. The alarmed safety zone is defined between the support member and the sensor assembly.