US Patent 10126762 Velocity and pressure equalization ports

A bypass flow valve is provided. The bypass flow valve includes a valve piston and a first annulus disposed on a first end of the valve piston. The first annulus has an inlet and an outlet and surrounds a first valve sleeve. The first valve sleeve contains an arrangement of a first plurality of ports providing fluid communication to the valve piston. The arrangement of the first plurality of ports includes a first region of the first valve sleeve in line with the inlet of the first annulus and a second region of the first valve sleeve in line with the outlet of the first annulus. The second region has fewer ports than the first region.