Circulating washer tool

Claim 1

A WELL TOOL OF THE CHARACTER REFERRED TO INCLUDING AN ELONGATE, VERTICAL, INNER ASSEMBLY WITH A CENTRAL, LONGITUDINAL FLOW PASSAGE, MEANS AT THE UPPER END OF THE INNER ASSEMBLY TO RELEASABLY CONNECT WITH THE LOWER END OF AN ELONGATE STRING OF FLUID CONDUCTING PIPE, A LATERAL PORT SPACED BETWEEN THE ENDS OF SAID INNER ASSEMBLY COMMUNICATING WITH THE FLOW PASSAGE, AN ELONGATE, VERTICAL, OUTER ASSEMBLY ROTATABLY ENGAGED ABOUT AND EXTENDING BELOW THE INNER ASSEMBLY, A LATERAL PORT BETWEEN THE ENDS OF SAID OUTER ASSEMBLY AND SHIFTABLE INTO AND OUT OF REGISTER WITH THE PORT IN THE INNER ASSEMBLY UPON RELATIVE ROTATION OF SAID INNER AND OUTER ASSEMBLY, UPPER AND LOWER, RADIALLY OUTWARDLY EXTENDING PACKING MEANS CARRIED BY THE OUTER ASSEMBLY ABOVE AND BELOW THE LATERAL PORT THEREIN TO ENGAGE AND SEAL BETWEEN THE TOOL AND AN ADJACENT WELL STRUCTURE, SAID INNER AND OUTER ASSEMBLIES COOPERATING TO DEFINE UPPER AND LOWER ANNULAR FLOW PASSAGES WITHIN THE TOOL ABOVE AND BETWEEN THE LATERAL PORTS AND TERMINATING BELOW THE UPPER END OF THE OUTER ASSEMBLY AND ABOVE THE LOWER END OF THE INNER ASSEMBLY, RADIAL INLET PORTS IN THE OUTER ASSEMBLY BELOW THE LOWER PACKING MEANS, ESTABLISHING COMMUNICATION BETWEEN THE LOWER ANNULAR FLOW PASSAGE AND THE EXTERIOR OF THE TOOL, FLOW MEANS IN THE CONSTRUCTION ESTABLISHING COMMUNICATION BETWEEN SAID UPPER ANNULAR FLOW PASSAGE AND THE EXTERIOR OF THE TOOL ABOVE THE UPPER PACKING MEANS, A TRANSFER PASSAGE IN THE TOOL ABOUT THE LATERAL PORT IN THE OUTER ASSEMBLY AND COMMUNICATING BETWEEN THE UPPER AND LOWER ANNULAR FLOW PASSAGES, AN AXIALLY DOWNWARDLY OPENING FLUID CONDUCTING PORT IN THE OUTER ASSEMBLY SPACED BELOW THE LOWER END OF THE INNER ASSEMBLY, VALVE MEANS CARRIED BY THE OUTER ASSEMBLY ADJACENT THE LOWER END OF THE INNER ASSEMBLY TO CONTROL THE FLOW OF FLUID DOWNWARDLY THROUGH THE DOWNWARDLY OPENING PORT AND INCLUDING A PART IN THE OUTER ASSEMBLY BELOW THE INNER ASSEMBLY HAVING A FLAT AXIALLY UPWARDLY DISPOSED TOP SURFACE AND AN AXIALLY EXTENDING FLOW PORT OFFSET FROM THE CENTRAL AXIS OF THE CONSTRUCTION, A VALVULAR CAGE ROTATIVELY ARRANGED IN THE OUTER ASSEMBLY