Apparatus for mixing fluids in a well

Claim 1

A DOWNHOLD MIXING TOOL ADAPTED TO BE CONNECTED TO THE LOWER END OF A SMALL BORE WELL TUBING AND SLIDABLY INSERTED INTO A SECOND LARGER DIAMETER WELL TUBING IN A WELL BORE WHICH COMPRISES; A TUBULAR MEMBER ATTACHABLE TO THE BOTTOM OF A SMALL BORE WELL TUBING SO THAT THE CENTER AXIS OF THE THROUGH PASSAGE OF SAID TUBULAR MEMBER COINCIDES WITH THE CENTER AXIS OF SAID SMALL BORE WELL TUBING WHEN ATTACHED THERETO, A SECOND LARGER DIAMETER WELL TUBING THE BOTTOM OF SAID TUBULAR MEMBER BEING ATTACHABLE THROUGH A SEALING MEANS TO SAID SECOND LARGER DIAMETER SURROUNDING WELL TUBING WHEREBY THE ANNULAR SPACE BETWEEN SAID SMALL BORE WELL TUBING AND SAID SECOND LARGER DIAMETER WELL TUBING IS SEALED OFF, SAID TUBULAR MEMBER HAVING TWO CHECK VALVES IN SPACED APART RELATIONSHIP IN SAID THROUGH PASSAGE, SAID VALVES DEFINING THE TOP AND BOTTOM OF A MIXING CHAMBER, THE UPPER OF SAID CHECK VALVES PROVIDING FOR THE INTRODUCTION OF A FIRST FLUID FROM SAID SMALL BORE WELL TUBING INTO SAID MIXING CHAMBER, A PLURALITY OF CHECK VALVES MOUNTED IN THE SIDE WALL OF SAID TUBULAR MEMBER ABOVE SAID SEALING MEANS AND BETWEEN THE SAID TUBE VALVES DEFINING THE TOP AND BOTTOM OF SAID MIXING CHAMBER IN SAID THROUGH PASSAGE, SAID PLURALITY OF CHECK VALVES IN THE SIDE WALL OF SAID TUBULAR MEMBER PROVIDING FOR THE INTRODUCTION OF A SECOND FLUID FROM THE ANNULAR SPACING BETWEEN SAID SMALL BORE WELL TUBING AND SAID SECOND LARGER DIAMETERED WELL TUBING INTO SAID MIXING CHAMBER AN THE LOWER OF SAID CHECK VALVES DEFINING THE BOTTOM OF SAID MIXING CHAMBE IN SAID THROUGH PASSAGE OF SAID TUBULAR MEMBER PROVIDING FOR THE REMOVAL OF THE RESULTING MIXTURE OF SAID FIRST AND SECOND FLUIDS THROUGH THE BOTTOM OF SAID MIXING CHAMBER.