Oil and gas

Shanghai Everspring has been supplying the Frac sand drilling market for over 10 years. We have provided everything from vent filter bags and liquid vessel filters to Sand Screeners.

Large quantities of silica sand are used during hydraulic fracturing. Sand is delivered via truck and then loaded into sand movers, where it is subsequently transferred via conveyer belt and blended with other hydraulic fracturing fluids prior to high pressure injection into the drilling hole. Transporting, moving, and refilling silica sand into and through sand movers, along transfer belts, and into blender hoppers can release dusts containing silica into the air. Workers can be exposed if they breathe the dust into their lungs.

We identified seven primary sources of silica dust exposure during hydraulic fracturing operations:

• Dust ejected from thief hatches (access ports) on top of the sand movers during refilling operations while the machines are running (hot loading).
• Dust ejected and pulsed through open side fill ports on the sand movers during refilling operations.
• Dust generated by on-site vehicle traffic.
• Dust released from the transfer belt under the sand movers.
• Dust created as sand drops into, or is agitated in, the blender hopper and on transfer belts.
• Dust released from operations of transfer belts between the sand mover and the blender; and
• Dust released from the top of the end of the sand transfer belt (dragon’s tail) on sand movers.