FISHING TOOLS FOR INSERTING OR REMOVING EQUIPMENT WITHIN OIL WELLS-NAMELY, STANDING VALVE RETRIEVING PRONGS, STANDING VALVE INSERTING PRONGS, AND PUMP RETRIEVERS; STARTING FILTER ASSEMBLIES ADAPTED TO FILTER POWER FLUID INTRODUCED INTO THE ENGINE ENDS OF BOTTOM HOLE HYDRAULIC OIL WELL PUMPS; OIL WELL TUBING CLEANING TOOLS FOR BRUSHING AND SCRAPING TUBING STRINGS; TUBING STRING GAUGING TOOLS; SOLUBLE PLUG INJECTORS FOR INTRODUCING SOLUBLE PLUGS INTO TUBING STRINGS TO REMOVE PARAFFIN FROM SAME; PRESSURE BOMB CARTRIDGES ADAPTED TO HOLD PRESSURE BOMBS FOR BOTTOM HOLE PRESSURE SURVEYS; KNOCK OUT COLLARS FOR BLEEDING POWER FLUID FROM POWER OIL TUBING STRINGS PRIOR TO REMOVAL FROM WELLS; SEATING SHOES PROVIDING A FLUID SEAL BETWEEN BOTTOM HOLE PUMP INTAKES AND EXHAUSTS; GAS ANCHORS TO SEPARATE WELL FLUID FROM ENTRAINED GASES WITHIN OIL WELLS; LUBRICATORS FOR INSERTING OR REMOVING HYDRAULIC PUMPS AGAINST PRESSURE IN TUBING STRINGS; BOTTOM HOLE ASSEMBLIES FOR RECEIPT OF BOTTOM HOLE HYDRAULIC OIL WELL PUMPS; AND PACKER NOSE ASSEMBLIES FOR ATTACHMENT TO BOTTOM HOLE HYDRAULIC OIL WELL PUMPS