One of the most commonly used plastics, polyethyleneOne of the most commonly used plastics, polyethylene in oil and gas is used primarily for fracking water removal, transportation of process water, or movement o… in oil and gas is used primarily for fracking waterAn inorganic compound of hydrogen and oxygen. Used in non-destructive testing as a penetrant and as a medium for testing. removal, transportation of process water, or movement of produced oil and gas.