Valve for wellbore use

A method for controllably moving fluid through a tubular string having a top portion in a rig and a bottom portion in a wellbore extending down into earth, the method comprising

• controlling flow of fluid in the tubular string with a valve, the valve comprising a body through which fluid is flowable, a valve seat connected in and to the body and through which fluid is flowable, a valve member positioned adjacent the valve seat and selectively movable to seat against the valve to close the valve to fluid flow and selectively movable away from the seat to open the valve to fluid flow, and a plurality of recesses on the valve member for holding debris and thereby preventing the debris from inhibiting valve closure.

A method for controllably moving fluid through a tubular string having a top portion in a rig and a bottom portion in a wellbore extending down into earth, the method comprising

• controlling flow of fluid in the tubular string with a valve, the valve comprising a body through which fluid is flowable, a valve seat connected in and to the body and through which fluid is flowable, a valve member positioned adjacent the valve seat and selectively movable to seat against the valve to close the valve to fluid flow and selectively movable away from the seat to open the valve to fluid flow, and at least one recess on the valve seat for holding debris and thereby preventing the debris from inhibiting valve closure, and wherein the fluid is wellbore cement.

A method for controllably moving fluid through a tubular string having a top portion in a rig and a bottom portion in a wellbore extending down into earth, the method comprising

• controlling flow of fluid in the tubular string with a valve, the valve comprising a body through which fluid is flowable, a valve seat connected in and to the body through which fluid is flowable, a valve member positioned adjacent the valve seat and selectively movable to seat against the valve to close the valve to fluid flow and selectively movable away from the seat to open the valve to fluid flow, and at least one recess on the valve seat for holding debris and thereby preventing the debris from inhibiting valve closure, wherein the at least one recess is a plurality of spaced apart recesses, wherein the valve is a mud saver valve, the valve further comprising a circulating head in combination with the valve, the valve connected beneath and in fluid communication with the circulating head, the valve further comprising a top drive, the circulating head connected to and below the top drive, the circulating head in fluid communication with the top drive, and wherein the fluid is drilling fluid and the rig is a drilling rig, and
• circulating fluid through the top drive, circulating head, and valve.