There are many different methods and means of coiled tube (CT) protection from harmful impact (up to CT damage) of strong acids and their compositions. Passivation method, proposed by a group of authors from Gubkin Russian State University of Oil and Gas is well known for its simplicity and originality.

Without prejudice to the value and advantages of well-known and brand new methods and means of CT protection we would like to familiarize specialists (CT users) and journal readers with one more method of CT protection from harmful impact of strong acids and compositions protected by Ukrainian patent No. 61355 of July 11, 2011.

Below we are considering possible technological options of CT protection in the field conditions right before acid treatment of a well.

.....

Full version of the article can be downloaded here.