Corrosion prevention method

Claim 1

THE METHOD OF TREATING A HYDROCARBON CONTAINING SYSTEM IN ITS NATURAL STATE IN A WELL FOR THE PURPOSE OF INHIBITING CORROSION BY AQUEOUS CARBONIC ACID OF WELL METAL PARTS, SAID SYSTEM COMPRISING A NON-OXIDIZING GAS PHASE, A LIQUEFIED NORMALLY GASEOUS HYDROCARBON PHASE AND A MINOR AMOUNT OF AQUEOUS CARBONIC ACID, WHICH SYSTEM IN A STATE OF AGITATED FLOW AT A TEMPERATURE OF BETWEEN ABOUT 45* C. AND ABOUT 125* C, AND UNDER A PRESSURE OF BETWEEN ABOUT FIFTEEN AND ABOUT SEVEN THOUSAND POUNDS PER SQUARE INCH ABSOLUTE COMES IN CONTACT WITH CORRODIBLE WELL PARTS, WHICH METHOD INCLUDES THE STEP OF MIXING WITH SAID SYSTEM AN AMOUNT OF BELOW APPROXIMATELY ONE WEIGHT PER CENT AND ABOVE APPROXIMATELY 0.0001 WEIGHT PER CENT OF AN OIL-SOLUBLE SALT OF AN ORGANIC SULFONIC ACID HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 450 AND 880. SAID SALT HAVING AN OLEPHILIC RESIDUE CONTAINING AT LEAST ABOUT 16 CARBON ATOMS.