The Well IXTOC No. 1 was located 94 km Northwest of Ciudad del Carmen, Campeche in the Gulf of Mexico. The drilling objective was to determine the existence of hydrocarbons in carbonate rocks of the paleocene, cretaceous and jurassic formations; the drilling operation was initiated on December 1st, 1978. On June the 3rd at 2:45 hrs., the Well started to flow out of control. This was the beginning of the IXTOC No. 1 blowout which lasted nine months and twenty-two days.

The purpose of this paper is to describe in a summarized form, the well control activities, including: the operations to reduce the flow of the well, the drilling of the directional control wells Ixtoc 1-A and Ixtoc 1-B, the installations used to assist in the operation and the pumping of fluids from the directional Wells to achieve the dynamic control on the Ixtoc No. 1 Well, that brought about the final plug operation.

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