Abstract: A method and system for metering proppant discharged from a storage container is disclosed. In certain embodiments, a method may comprise loading a known amount of a first proppant type into a storage container, detecting proppant at or adjacent to a discharge outlet of the storage container via one or more sensors coupled to the storage container, operating a metering device at a predetermined speed, wherein the metering device may be coupled to the discharge outlet of the storage container, and wherein the metering device may comprise one or more pockets for receiving the first proppant type. In certain embodiments, the method may further comprise dispensing a known amount of the first proppant type from the storage container via the metering device, wherein an encoder coupled to the metering device may emit pulses during the dispensing.

Abstract: A portable drive-over conveyor is provided with a plurality of inlets and first and second conveyors so as to be arranged for simultaneously unloading multiple trucks side by side. Furthermore, the portable drive-over conveyor may be used in a system with another such drive-over conveyor in parallel to unload a truck having multiple discharges at each of the discharges by forming a bridge in between center structures of the drive-over conveyors allowing the truck to cross over the side by side drive-over conveyors and position the multiple discharges over the inlets of the side by side conveyors. Moreover, the second conveyor is swivably mountable on a frame of the drive-over conveyor such that particulate material is dischargeable at different locations angularly of a longitudinal axis of the trailer. The portable drive-over conveyor includes other novel features which are usable on a drive-over conveyor of the same type having at least one inlet.

Abstract: A portable drive-over conveyor for unloading particulate material from trucks features a towable trailer supporting a conveyor system having two stages, each transferring the unloaded material in opposite directions along a length of the trailer so as to progressively elevate the particulate material to a suitable height above the ground for discharging from the portable drive-over conveyor. A first stage of the conveyor system transfers the material in one direction from an inlet of the conveyor system to a transfer discharge, whereat the unloaded material is transferred to the second stage transferring the material in an opposite direction to a discharge of the overall conveyor system which is located at a higher elevation than the transfer discharge.

Abstract: A portable conveying apparatus for transferring particulate material comprises a conveyor supported on a trailer frame and operable to convey the material for subsequent discharge to a target location. A housing mounted to the trailer frame and substantially covering a top of the conveyor defines at least one inlet for delivery of material from a container to the conveyor. A flexible chute communicating each inlet and a container discharge to guide the material to the apparatus housing is carried on the trailer frame in a storage position so as to be transportable therewith. Within the housing, an upper guide surface converges to a central grate disposed at a transversely offset location from the respective inlet for central depositing of the material onto the conveyor. A suspension arrangement is operable to raise and lower the trailer frame between transport and operating positions so that a bottom of the trailer frame can rest on the ground to inhibit the dust emanating during use.