The problem of corrosion in condensate and high pressure wells producing sweet oil is discussed. The corrosion problem encountered in condensate wells is rather well known, but it is not generally known that a very similar problem exists in a large number of oil wells. The work that has been done on these two problems is reviewed and current practices are summarized.
The mechanical aspects of equipping and completing wells in which corrosion is a problem are discussed. Leakage through threaded tubing connections is an important subject which needs study in conjunction with corrosion preventive work. Attention is being given to joint designs, thread lubricants, and tubing installation practices. The various ways that wells can be completed in order to permit control of corrosion are discussed.
Detailed discussions are devoted to the various materials that can be used for tubing and for well-head assemblies in these services. The use and relative value of materials reported on include low carbon steel tubing, 9 percent nickel steel tubing, internally nickel-plated tubing, and plastic-coated steel tubing. A review is presented of the various chemicals that are used as neutralizing agents, emulsifying and/or wetting agents, and other film-forming materials. The relatively new use of sodium silicate is discussed in detail. The procedures followed in the use of chemicals are given.
The methods of determining the corrosive conditions and the efficiency of methods used to prevent corrosion are summarized.
