Ball circulation pump skid and related method

A hydraulic method for use with a ball circulation pump skid, comprising:

• providing a hydraulic circuit having exactly one pump for moving fluid through the hydraulic circuit, said hydraulic circuit including an external device and a manifold of the ball circulation pump skid, a plurality of cleaning balls being disposed in said fluid;
• operating said exactly one pump to move fluid through said hydraulic circuit including said external device and said manifold;
• during the operating of said exactly one pump, selectively actuating valves in said manifold;
• and
• by virtue of the selective actuation of said valves:
• (a) during a first of exactly two modes of fluid-flow of the hydraulic circuit, said first of said exactly two modes being implemented by a first state of actuation of said valves, directing fluid from said external device only along a first path, extending in part through said manifold and through a ball collection capsule in said manifold, to thereby capture, in said ball collection capsule, cleaning balls in the fluid flowing from said external device in said first state of actuation of said valves, and form ball-free fluid,
• (b) during said first of said exactly two modes of fluid-flow, guiding the ball-free fluid from said ball collection capsule along said first path directly to said pump only and from said pump directly only back to said manifold,
• (c) during a second of said exactly two modes of fluid-flow of the hydraulic circuit, said second of said exactly two modes being implemented by a second state of actuation of said valves different from said first state of actuation, directing all of the ball-free fluid from said pump along a second path directly to said manifold only and through said ball collection capsule therein to entrain the cleaning balls therein and to thereby form ball-entraining fluid, and
• (d) during the second of said exactly two modes of fluid-flow, moving the ball-entraining fluid from said ball collection capsule in said manifold along said second path directly only to said external device.