Remotely operable fluid flow control valve

Claim 1

A REMOTELY OPERATED FLOW BEAM FOR USE IN SUBSEA OIL WELLS COMPRISING: A VALVE BODY HAVING A FLOW STREAM PASSAGE TO BE INTERCONNECTED WITH THE FLOW STREAM OF A SUBSEA OIL WELL AND A GATE RECEIVING PASSAGE NORMAL TO AND INTERSECTING SAID FLOW STREAM PASSAGE; GATE MEANS SLIDABLY MOUNTED IN SAID GATE RECEIVING PASSAGE TO MOVE NORMAL TO AND THROUGH SAID FLOW STREAM PASSAGE, SAID GATE MEANS INCLUDING A PLURALITY OF INDIVIDUAL ORIFICES OF DIFFERENT SIZES FOR ALIGNMENT WITH SAID FLOW STREAM PASSAGE ON MOVEMENT OF SAID GATE MEANS TO SELECTIVELY RESTRICT FLUID FLOW THROUGH SAID FLOW STREAM PASSAGE; BIASING MEANS ASSOCIATED WITH SAID BODY AND GATE MEANS TO BIAS SAID GATE INTO AN OPEN STARTING POSITION; CONTROL MEANS ASSOCIATED WITH SAID BODY FOR MOVING SAID GATE MEANS AGAINST SAID BIAS RELATIVE TO SAID FLOW STREAM PASSAGE TO SELECTIVELY ALIGN ANY OF SAID ORIFICES WITH SAID FLOW STREAM PASSAGE TO CONTROL FLUID FLOW THERETHROUGH IN RESPONSE TO FLOW STREAM BACK PRESSURE; RATCHET MEANS FOR HOLDING SAID GATE AGAINST SAID BIAS IN POSITIONS SELECTED BY OPERATION OF SAID CONTROL MEANS WITH A SELECTED ORIFICE ALIGNED WITH SAID FLOW STREAM PASSAGE; AND RESETTING MEANS FOR HOLDING SAID RATCHET MEANS INOPERATIVE UNDER SAID BIAS UPON MOVEMENT OF SAID GATE TO A FULLY RAISED POSITION BY APPLICATON OF FLUID STREAM BACK PRESSURE ON SAID CONTROL MEANS AND FOR RELEASING SAID RATCHET MEANS INTO OPERATIVE POSITION ON RETURN OF SAID GATE TO SAID STARTING POSITION, SAID CONTROL VALVE THEREBY BEING FULLY OPERABLE FROM A STARTING POSITION THROUGH SELECTED ORIFICE ALIGNED POSITIONS TO A FULLY RAISED POSITION AND RESET BACK TO SAID STARTING POSITION BY THE SELECTED APPLICATION OF FLOW STREAM BACK PRESSURE THROUGH THE SINGLE FLOW LINE IN WHICH SAID VALVE BODY IS INTERCONNECTED AND FROM A LOCATION REMOTE FROM SAID CONTROL VALVE.