Allowable Acid percentage to pump inside Drill String

Dear All,

During running 5" liner in 79 ° well in Yamama formation that is carbonate , String got stuck in MD=4135 m

We have 1200m 5½" DP (with TK-34 internal coating) , 1900m 3½" DP (with TK-34P internal coating) and 1000m 5" liner. After 4 days working on stuck , client decided to pump acid 

Whats maximum allowable Acid percentage that we can pump through String and how long this process can take time that will not damage the pipes internal coating ?

Temperature is almost 140°F on end of 3½" DPs.

Regards 

Mohsen

1 Answer(s)

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