Systems, methods and apparatuses for inspecting a tank containing a flammable fluid are provided. The system includes a vehicle having a propeller, a latch mechanism, a pressure switch, and an inspection device. The system includes a control unit in communication with the propeller, the latch mechanism, and the inspection device, and electrically connected to the pressure switch. The control unit powers on responsive to the pressure switch detecting an ambient pressure greater than a minimum threshold. The control unit receives, from the latch mechanism, an indication of a state of the latch mechanism. The control unit determines that the cable used to lower the vehicle into the tank containing the flammable fluid is detached from the vehicle. The control unit commands the propeller to move the vehicle through the flammable fluid. The control unit determines a quality metric of a portion of the tank.

A wet sand delivery and conveyor apparatus ships wet proppant from a sand mine wet plant to a well fracturing site and delivers the wet proppant directly to the well site. The wet sand delivery and conveyor apparatus comprises a multi-container support frame, which is mounted on a trailer bed, a plurality of containers mounted to an upper portion of the frame, and a conveyor belt mounted on the frame below the plurality of containers and positioned to receive proppant released in a gravity pour from the containers onto the conveyor belt. An auger mounted near an end of the conveyor belt is also provided to transfer sand from the end of the trailer bed to a position extending diagonally upward and away from the trailer bed to drop sand into a vessel or sand deposit site positioned underneath an upper end portion of the auger.

A tank and a method of carrying a load and discharging a load therefrom. The tank includes a body having a first wall that bounds and defines a first compartment for carrying a load therein and a second wall spaced outwardly from at least a portion of the first wall; wherein a second compartment is defined between the first wall and the second wall. An air piping system is selectively actuated to place the first compartment and the second compartment under substantially similar or substantially equal air pressure. In one example the air piping system pumps air into the first compartment and the second compartment. In another example the air piping system evacuates air from the first and second compartments.

A walking mud handling system may include a walking mud tank and a plurality of hydraulic walkers coupled to the walking mud tank. Each hydraulic walker may include a walking foot, a hydraulic lift, and a sliding actuator. The hydraulic lift may include a hydraulic cylinder coupled to the walking foot such that extension of the hydraulic cylinder extends the walking foot into contact with the ground. The sliding actuator may include one or more hydraulic cylinders coupled to the walking foot such that extension of the sliding actuator moves the walking foot laterally relative to the hydraulic lift.

Inside a tank body storing a liquid, a return filter is provided protruding downward from an upper surface of the tank body, and a substantially plate-like (plate-shaped) float is also provided that is inserted into the tank body and floats in accordance with change in a liquid surface of the liquid stored in the tank body. The float is provided with an opening larger than a diameter of a filter case, and in a plan view, the float is disposed between the tank body and the filter case.

A liquid product storage and delivery system is provided. The liquid product storage and delivery system includes a storage tank and a liquid bladder supported inside of the storage tank.

A method of transporting waxy crude hydrocarbon includes: providing a container having an internal chamber with at least one port for receiving flowable waxy crude, wherein the container is provided at a refinery location; filling the internal chamber of the container with a filling system for loading the waxy crude hydrocarbon into the container; allowing the waxy crude hydrocarbon to cool and solidify into a non-flowable state; transporting the container having the non-flowable waxy crude hydrocarbon with at least one transport vehicle, wherein the transporting is performed without actively heating the waxy crude hydrocarbon with an active heating system, wherein the transporting is along a transportation route having a beginning at the refinery location and an ending; heating the waxy crude hydrocarbon at the ending of the transportation route until flowable; and removing the flowable waxy crude hydrocarbon from the container with an emptying system.

An intermodal tank container and complementary chassis, and features and methods for use thereof, are disclosed. The intermodal tank container and chassis has an appearance and length substantially similar to a non-intermodal OTR tank trailer, while affording the same capacity as an intermodal tank container. The design of the tank container allows for an improved, lighter design for the chassis and for improved usability of the tank container in intermodal environments such as with rail cars. The reduced weight of the chassis allows for a greater payload while remaining within various applicable legal restrictions for gross vehicle weight, axle weight, etc.

A tailgate assembly for a roll-off container includes a tailgate hinge that is operable to attach a tailgate to a container such that the tailgate is movable between an open position and a closed position. A sealing material located between the container and the tailgate when the tailgate is in the closed position.

A tailgate assembly includes a tailgate hinge that is operable to attach a tailgate to a vacuum tank such that the tailgate is movable between an open position and a closed position, the vacuum tank operable to withstand vacuum pressure when the tailgate is in the closed position. A tailgate warming tube loop is operable to circulate a heated fluid through the tailgate, the tailgate warming tube loop attached to an interior surface of the tailgate and a first rear pipe flange that includes a first rear pipe flange warming channel in communication with the tailgate warming tube loop.