Well bore pressure regulator apparatus

Claim 1

IN A PRESSURE REGULATOR FOR FLUID FLOWING THROUGH TUBING IN A WELL BORE: A BODY ADAPTED TO BE MOUNTED IN THE TUBING AND HAVING A FLUID PASSAGE THERETHROUGH; A FIRST VALVE MEMBER IN SAID BODY PROVIDING A VALVE SEAT; A SECOND VALVE MEMBER IN SAID BODY MOVABLE UPWARDLY FROM SAID SEAT BY FLUID PRESSURE IN SAID BODY THEREBELOW; MEANS PROVIDING A LOWER SEAL BETWEEN THE EXTERIOR OF SAID SECOND MEMBER AND BODY TO PREVENT FLUID IN SAID BODY BELOW SAID SECOND MEMBER FROM FLOWING BETWEEN THE ENTIRE CIRCUMFERENCE OF SAID EXTERIOR OF SAID SECOND MEMBER AND BODY SAID SECOND MEMBER HAVING A SURFACE RESPONSIVE TO FLUID PRESSURE IN SAID BODY THEREABOVE TO URGE SAID SECOND MEMBER DOWNWARDLY TOWARD SAID VALVE SEAT; MEANS PROVIDING AN UPPER SEAL BETWEEN THE EXTERIOR OF SAID SECOND VALVE MEMBER AND BODY TO PREVENT FLUID IN SAID BODY ABOVE SAID SECOND MEMBER FROM FLOWING BETWEEN THE EXTERIOR OF SAID SECOND MEMBER AND BODY; THE SEAL DIAMETER OF SAID LOWER SEAL BEING GREATER THAN THE SEAL DIAMETER OF SAID UPPER SEAL; SAID BODY AND SECOND MEMBER PROVIDING A SPACE THEREBETWEEN AND BETWEEN SAID UPPER AND LOWER SEALS; SAID BODY HAVING ANOTHER PASSAGE ESTABLISHING FLUID COMMUNICATION BETWEEN THE EXTERIOR OF SAID BODY AND SAID SPACE TO ALLOW FLUID PRESSURE IN THE TUBING EXTERNALLY OF SAID BODY TO PASS THROUGH SAID ANOTHER PASSAGE INTO SAID SPACE AND ACT ON AND URGE SUCH SECOND MEMBER DOWNWARDLY TOWARD SAID SEAT, THE FLUID PRESSURE FORCE BELOW SAID SECOND VALVE MEMBER AND ACTING ON SAID SECOND VALVE MEMBER TO URGE SAID SECOND VALVE MEMBER UPWARDLY FROM ITS SEAT BEING GREATER THAN THE FLUID PRESSURE FORCE IN SAID SPACE AND ACTING DOWNWARDLY ON SAID SECOND VALVE MEMBER TO URGE SAID SECOND VALVE MEMBER DOWNWARDLY TOWARD ITS SEAT.