A trailer for transporting granular material, such as sand or proppant, has a purpose-built shape, and loading and unloading hatches at top and bottom. The trailer includes a hollow vessel for holding granular material. The vessel is enclosed with top and bottom hatches. The vessel has a tapered lower section and a domed upper section, allowing bulk material to be piled and concentrated horizontally below and above the hatches. A chassis extends fore and aft of the vessel, and potentially through an interior of the vessel. The chassis may extend upward from a wheeled section so as to pass through a vertically central part of the vessel. The chassis may also act as a trailer suspension system. The vessel may be made of aluminium and mounted to the steel chassis.

A closure assembly includes a tank opening flange that surrounds a tank opening of a supply tank and a tank lid that covers the tank opening. The tank lid is operable between open and closed positions. A compression seal is attached to an underside of the tank lid and is disposed between the tank opening flange and the tank lid when the tank lid is in the closed position. A pair of guides are attached to opposite sides of the tank opening flange wherein each of the pair of guides defines a track opening to receive a plurality of sliding mechanisms attached to the tank lid. The track opening guides the sliding mechanisms and the tank lid around the tank opening flange such that the compression seal does not engage the tank opening flange when the tank lid is operated between the closed and open positions.

A tank trailer includes a tank having an outer surface face and an inner surface and a central longitudinal vertical plane extending between the first end and the second end. The outer surface faces away from the central longitudinal vertical plane and the inner surface faces towards the central longitudinal vertical plane. The outer surface and the inner surface define an interior volume adapted to be filled with material. The tank trailer may further include a set of ground-engaging wheels supporting the tank trailer from below, a bar positioned proximate the outer surface of the tank and a light source provided on the bar. The tank may further include a frame member operatively engaged with the bar and a sheet material extending between the bar and the frame member. The frame member is movable between a first position and a second position.

An automatic hatch assembly for bulk material containers, and especially for bulk material containers on vehicles, provides for the remote control and automated operation of opening/closing, locking/unlocking, and/or sealing/unsealing hatch functions. The hatch covers a fill opening of the container, and may be retrofitted to existing containers equipped with conventional hatch covers. A drive unit is operable to open and close the hatch cover, and a locking assembly actuates extendable lock members. Optionally, a pneumatic seal is provided within the cover for sealing the container from the outside environment. The locking assembly may be particularly well-suited to resisting opening forces applied to the cover, such as when the container is pressurized, and a sequencing controller may be provided to facilitate automated operation.

A heated portable vacuum slurry box for efficiently storing and transporting material including drill cuttings from gas and oil well sites. The slurry box generally includes a vacuum tank, a structure attached to the tank, a mechanical bay, a vertical tailgate, and a hook for pulling the slurry box onto a vehicle. The features allow for the slurry box to be meet space restriction requirements at a well site while as well as function within the environmental conditions of winter and summer seasons. Jacketed openings, stack mount systems, and a removable power unit allow for efficient use of the slurry box.

A transport trailer and method specifically adapted for safely transporting liquid containing unstabilized drilling waste from more than one waste generator or, multiple waste streams from one or more waste generators. Typically drilling waste is stabilized using binding agents like fly-ash, liquids absorbing pellets or sawdust. In many jurisdictions binding agents are required to stabilize the drill cuttings prior to transport. A sealed transport trailer comprising greater than one container on the transport trailer is described herein which is specifically designed, sized and positioned over a set of axels so as to provide for safe, non-spilling transport, and particular ease of emptying for unstabilized drilling waste.

A collection tank for a mobile vacuum excavator includes a front with a closed end, a rear with an open end, a door configured to be closed over the open end, and a linkage assembly having a first end attached to the door and a second end attached to the body. A first pivotal movement drives the first end and second end away from each other, and a second pivotal movement moves the first end and the second end toward each other. An actuator is attached to the first arm and to the second arm so that actuation of the actuator in a first direction drives the first pivotal movement and actuation of the actuator in a second direction drives the second arm the second pivotal movement.

A closure assembly includes a tank opening flange that surrounds a tank opening of a supply tank and a tank lid that covers the tank opening. The tank lid is operable between open and closed positions. A compression seal is attached to an underside of the tank lid and is disposed between the tank opening flange and the tank lid when the tank lid is in the closed position. A pair of guides are attached to opposite sides of the tank opening flange wherein each of the pair of guides defines a track opening to receive a plurality of sliding mechanisms attached to the tank lid. The track opening guides the sliding mechanisms and the tank lid around the tank opening flange such that the compression seal does not engage the tank opening flange when the tank lid is operated between the closed and open positions.

A tank for transporting fluids on a truck chassis includes a front wall, side walls, a back wall, a top, and a floor. Interior stairs extend from the floor to an opening in the top to allow stair access into the interior with integrated safety handrails on the fill port cover. Stair toe kicks act as internal transverse baffles to help control fluid motion and surging. The stairs also act as a structural stiffener between longitudinal baffles. Horizontal baffles assist in controlling fluid motion and surging. Formed baffles provide strength and stiffness. A baffle interlocking system improves joint integrity and aids manufacturing. Formed outer skins provide structural strength for the tank. Ports located in front and rear bulkheads may be used for tank ventilation or, depending on local safety codes, as secondary access points. Doors or other access openings may be located in the tank bulkheads to provide better interior access.

A cargo tank assembly can include a cargo tank, and a plurality of access ports for the cargo tank, including a manway. A cabinet can be arranged to provide ground-level access to the plurality of access ports. In some embodiments, the cabinet can provide a sole breakable seal for a set of equipment, or for the cargo tank.