7 Oil pumping and extraction devices, namely, hydraulic artificial lift systems comprised of hydraulic jet and piston pumps, gas lift systems comprised of hydraulic valves and mandrels which support both continuous flow and intermittent flow applications, and downhole pumps, namely, hydraulic jet and piston pumps, electric submersible pumps (ESP) comprised of a submersible motor, pump and motor protector and seal section, plunger pumps for rod lift systems, progressive cavity pumps, surface pumps, namely, positive displacement pumps, diaphragm pumps, centrifugal pumps, vertical and horizontal multi-stage process pumps, vertical and horizontal multi-stage barrel pumps, and submersible turbine pumps