KOBE

CONTROL VALVE FOR FLUID OPERATED HYDRAULIC PUMP INSTALLATIONS; SELECTOR VALVE FOR CONTROLLING DIRECTION OF OIL THROUGH BOTTOM HOLE PUMP ASSEMBLIES; STANDING VALVE ASSEMBLY ADAPTED TO REST WITHIN A BOTTOM HOLE ASSEMBLY FOR PROVIDING COMMUNICATION BETWEEN THE INTAKE OF A BOTTOM HOLE HYDRAULIC OIL WELL PUMP THROUGH THE BOTTOM HOLE ASSEMBLY WITH THE OIL WELL BORE AND FOR SHUTTING OFF SAID COMMUNICATION WHEN THE PUMP IS REMOVED FROM THE BOTTOM HOLE ASSEMBLY; CHECK VALVE FOR USE WITHIN POWER TUBING TO PREVENT BACKFLOW OF WELL FLUID THROUGH A BOTTOM HOLE HYDRAULIC PUMP WHEN THE LATTER IS LOWERED INTO AN OIL WELL; AND SMALL DIAMETER HIGH PRESSURE PIPE AND TUBING