Method and system for dewatering reserve pits

A system for dewatering a reserve pit of the type used in drilling oil and gas wells comprising:

• a holding tank for settling solids from liquid;
• first conduit means connected to the holding tank and adapted to extend to and into the reserve pit;
• a first pump interconnected in the first conduit means for pumping liquids from the reserve pit via said first conduit means to the holding tank;
• filter means associated with said first conduit means for separating solids from liquids passing through said first conduit means from the reserve pit to the holding tank;
• a first engine drivingly connected to said first pump;
• a boiler;
• second conduit means interconnected between the holding tank and the boiler for conveying liquid from said holding tank to said boiler;
• a second pump interconnected in the second conduit means for pumping liquids from said holding tank via said second conduit means to said boiler;
• a second engine drivingly connected to said second pump;
• burner means for heating and firing said boiler;
• a source of liquefied petroleum gas for fueling said burner means;
• heat exchange means for exchanging heat between the liquefied petroleum gas used to fuel said burner means and a coolant used for cooling said engines employed for driving said pumps;
• first means for conveying solids from said holding tank to said reserve pit;
• and second means for conveying solids from said boiler to said reserve pit.