ELECTRONICALLY CONTROLLED WEAK LINK AGAINST COMBINED LOAD Russian patent published in 2016 - IPC E21B33/38 

FIELD: oil and gas industry.

SUBSTANCE: device comprises connection disconnected in riser column or hose. At that releasable connection is made so that it may be released or disconnected at occurrence of preset conditions for protection of the borehole barrier or another interfacing construction. At that safety device comprises at least one sensor to monitor tensile loads, flexural loads, loads in result of inner pressure and temperature. At that the above sensor may be installed at the riser or hose section, it is designed to collect measurement data related to tensile load, flexural load, load in result of inner pressure and temperature. Besides, the device comprises electronic unit for data collecting and processing capable to receive and interpret measurement data of at least one sensor and electronic or hydraulic or mechanical actuator or switch capable to receive signal from the above electronic unit for data collecting and processing and to initiate release or to disconnect releasable connection.

EFFECT: improved safety due to ensured protection of the borehole barrier integrity or another critical interfacing construction by on-line detection and response to emergency.

18 cl, 16 dwg