Patent ID: 9267345
Filing Date: 2016-02-23
CPC Classification: E21B,F16K,Y10T

Claim Text:
1. Circulating valve comprising: an outer housing comprising radial ports provided axially between an upper portion of the valve and a lower portion of the valve, where the upper portion comprises a tube connector and where the lower portion is closed; an inner sleeve provided inside the outer housing, where the inner sleeve is providing an axial bore through the upper portion of the valve to the radial ports; a cylinder compartment provided between the inner sleeve and the outer housing; a piston arranged for axial and rotational movement in the cylinder compartment, where the piston comprises piston ports arranged to provide fluid communication between the axial bore and the radial ports when the piston is in an open position, and where the piston is arranged to prevent fluid communication between the axial bore and the radial ports when the piston is in closed positions; an actuating device applying an axial pressure on the piston; a sleeve opening providing fluid communication between the axial bore and the cylinder compartment; a fluid orifice provided radially inside the inner sleeve; and a position controlling device for controlling the axial and rotational position of the piston in relation to the outer housing.