FIELD: oil and gas extraction industry. SUBSTANCE: device has removable part, made in form of flat hollow spring fork with projecting teeth for interaction with lower facets of stopping prism. Hollow flat cantilever spring anchor is equipped with holding fingers and hooks. Hooks are latched to holding fingers and have projections for assuring simultaneous operation in case of action on one of said hooks. Stopping prism is connected to the holder of well devices made in shape of U-shaped divergent fork. EFFECT: increased reliability of operation, simplified operation process due to absence of maintenance before each lowering into a well. 7 dwg
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