Published January 2018

Application of newly designed fishing tool while repairing casing heads in emergency producing wells

D.A. Iskandarov

Y.A. Ibrahimov

The paper notes that in the wells become emergency in the result of fire on offshore platform appearing due to the natural disaster, problems raised, as well as in the view of casing heads rehermatization. In some repaired wells in deformed casing head due to its elements breakdown, casing string sliding downstairs appeared. With the purpose of stretching for its previous condition restore, a necessity of releasing tool application such as inner spear occurred. The visibility of existing releasing inner spear with mechanical and hydraulic releasing mechanisms is provided, design, features and technical parameters, excluding their application in noted wells analyzed as well. The paper presents the data on developed for this purpose releasing inner spear with hydraulic mechanism of releasing, its design, operation principle, superiority parameters and successful application in the wells as well.