A transport system for carrying a proppant, the system comprising a loading tower, a first transfer tower, a second transfer tower and an unloading tower. The loading tower is located proximate a loading area while the unloading tower is located proximate an unloading area. The system also includes a first transfer tower and a second transfer tower. A first aerial cable conveys a transfer container from the loading tower to the first transfer tower, while a second aerial cable conveys the transfer container from the second transfer tower to the unloading tower. The transfer container is configured to be suspended from the first and second aerial cables en route from the loading tower to the unloading area. Sand or supplies from the transfer container is received at the unloading area for use in a wellbore operation. Methods of transporting sand for use in wellbore fracturing operations are also provided.

Device for supporting and guiding an aerial carrying-hauling cable of a cable lift installation, said device including a beam supporting a plurality of rotary sheaves designed to press on the cable to guide it when it is running, each rotary sheave being associated with a damping connection articulated around a pivot to form an individual module fixed individually to the beam, the different individual modules being staggered at regular intervals along the beam.

Device for supporting and guiding an aerial carrying-hauling cable of a cable lift installation, said device including a beam supporting a plurality of rotary sheaves designed to press on the cable to guide it when it is running, each rotary sheave being associated with a damping connection articulated around a pivot to form an individual module fixed individually to the beam, the different individual modules being staggered at regular intervals along the beam.

A cable carrier apparatus has a bracket having a vertical mounting surface interface for mounting securely to a post, wall, or other stable support, and a horizontal portion, a first roller rotatable on a vertical post anchored to be stationary relative to the frame bracket, with the first roller positioned below the horizontal portion of the bracket, the first roller having a circumferential groove symmetrical around an axis of the post and about a horizontal plane, the groove having a cross-section with a radius describing a portion of a semicircle, but less than a full semicircle, and a second roller matching the first roller and rotatable on a second post having an axis, the second roller mounted to be translatable against spring force away from the first roller, wherein a traveler translating on a cable being held between the two rollers traverses through the rollers, maintaining the cable between the rollers.

A cable carrier apparatus has a bracket having a vertical mounting surface interface for mounting securely to a post, wall, or other stable support, and a horizontal portion, a first roller rotatable on a vertical post anchored to be stationary relative to the frame bracket, with the first roller positioned below the horizontal portion of the bracket, the first roller having a circumferential groove symmetrical around an axis of the post and about a horizontal plane, the groove having a cross-section with a radius describing a portion of a semicircle, but less than a full semicircle, and a second roller matching the first roller and rotatable on a second post having an axis, the second roller mounted to be translatable against spring force away from the first roller, wherein a traveler translating on a cable being held between the two rollers traverses through the rollers, maintaining the cable between the rollers.

A device for supporting and guiding a hauling cable of a vehicle transportation installation, including a support structure, at least one movable member and at least one axis enabling the at least one movable member to swivel with respect to the support structure, an opening being formed inside the at least one axis and extending between two ends of the at least one axis.

A device for supporting and guiding a hauling cable of a vehicle transportation installation, including a support structure, at least one movable member and at least one axis enabling the at least one movable member to swivel with respect to the support structure, an opening being formed inside the at least one axis and extending between two ends of the at least one axis.

A hybrid cable/rail transportation system comprising: at least one portion of the system configured as a cable transportation system; at least one portion of the system configured as a rail transportation system, a first trolley coupled to the supporting cable and comprising a first coupling device for coupling to the cabin; a second trolley coupled to the rail and comprising a second coupling device for coupling to the cabin; a plurality of transportation units wherein each transportation unit comprises a cabin, each cabin comprising a roof provided with a coupling system configured for coupling the cabin to the first trolley along the system portion configured as a cable transportation system and to the second trolley along the system portion configured as a rail transportation system; wherein the coupling system arranged on the roof of the cabin, the first coupling device of the first trolley and the second coupling device of the second trolley are configured for allowing a progressive passage of the cabin from the first to the second trolley, or vice-versa, without stopping the support.

A hybrid cable/rail transportation system comprising: at least one portion of the system configured as a cable transportation system; at least one portion of the system configured as a rail transportation system, a first trolley coupled to the supporting cable and comprising a first coupling device for coupling to the cabin; a second trolley coupled to the rail and comprising a second coupling device for coupling to the cabin; a plurality of transportation units wherein each transportation unit comprises a cabin, each cabin comprising a roof provided with a coupling system configured for coupling the cabin to the first trolley along the system portion configured as a cable transportation system and to the second trolley along the system portion configured as a rail transportation system; wherein the coupling system arranged on the roof of the cabin, the first coupling device of the first trolley and the second coupling device of the second trolley are configured for allowing a progressive passage of the cabin from the first to the second trolley, or vice-versa, without stopping the support.

A tandem pulley includes a support bracket having the shape of an inverted U. The support bracket defines a through hole. A pair of sheaves is arranged in line inside the support bracket. Each sheave is mounted rotating freely around a spindle fixed to the support bracket. A carabiner is fitted in the through hole. A connector is configured to connect the support bracket with the carabiner. The connector is configured in such a way as to allow rotation of the carabiner around an axis parallel to the spindles of the pair of sheaves. A spring is connected to the support bracket, the spring being arranged to exert a force on the carabiner biasing the latter to a rest position by rotation of the carabiner.