The SandHawk Flow Back Tank System incorporates pioneering design and leading‐edge technology for more cost‐efficient solutions for your drilling operations. Its’ environmental imprint is minimal due to the Flow Back waste handling capabilities. The SandHawk can eliminate the necessity for extensive use of frac tanks and costly vacuum truck services that are considered the norm for drilling operations.

The SandHawk carefully removes substantial amounts of abrasive or caustic materials consistent with sand, plug parts and particulate matter from process water in closed loop water supply systems.

Flowback Slurry Processes

Slurry from the well during completion operations enters the Flow Back Tank through the gas busters mounted on top of the tank. The gas busters discharge into the middle of the tank over tilted plate baffles that help to evenly distribute the solids,diminish turbulence and slow the velocity of solids to enhance settling. The solids that enter the tank settle to the bottom and are conveyed by the shaftless auger to the hydrocyclone feed pump suction at the rear of the tank.

The Hydrocyclone Feed Pump processes the slurry from the bottom and discharges it onto a linear shaker that is equipped with 200 mesh screens . The shaker processes and catches the hydrocyclone underflow discharge (approximately 200GPM) where the solids are then dewatered and conveyed towards the rear end of the tank into a catch box, container or conveyor for haul off.

Process Flow

The remaining liquids, or underflow, from the shaker dewatering process discharge into the rear of the tank and are therefore recycled through the hydrocyclones. The overflow is divided such that 95% of the hydrocyclones overflow discharges into a perforated possum belly in the front third of the tank and passes through tilted plate baffles at an equal rate from the well, typically 250 GPM, towards a 12” overflow pipe at the front of the tank. The remaining 5% diverts through two slotted pipes in the bed of the shaker to ensure minimal solids build‐up.Approximately 700 GPM of the remaining slurry (along with any sand present in the hydrocyclone overflow), cycles back through the tilted plate baffles. Sand settled in the bottom of the tank conveys back to the hydrocyclone feed pump suction by the shaftless auger for removal. The shaker underflow discharge permits for continuous recycling of fluids through the hydrocyclones and prevents contamination of the clean effluent overflow to the frac tanks.

Shaftless Auger

The VFD controlled variable speed shaftless auger located at the bottom of the Flow Back Tank is compromised primarily of half pitch flighting with a short section of full pitch near the hydrocyclone feed pump. This full pitch section reduces the height of the conveyed sand and practically eliminates suction loss occurrence in the feed pump.

Features

• SandHawk delivers dryer solids
• Smaller economic footprint
• Less abrasive materials in the closed loop water systems
• SandHawk reduces logistical support equipment
• Water volume is reduced