FIELD: oil and gas industry.
SUBSTANCE: device comprises a cylindrical housing, a fixed lifting stop of the shutoff body, mounted in the cylindrical housing and arranged in the upper part of the catcher, a locking cylindrical insert mounted in the cylindrical housing and located in the lower part of the catcher, and the retaining element mounted with the possibility to rotate in the locking insert and made with the possibility to substantially overlap the cross-sectional area of the locking insert to retain the shutoff body while providing the fluid medium flow.
EFFECT: increasing the efficiency of work on the tubing string preparation to the process operations of impact on the formation, and, as a consequence, on the more effective impact on the formation due to a more reliable locking of the shutoff body in the well catcher.
10 cl, 5 dwg
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