The utility model relates to the technical field of locking mechanisms, and discloses a
locking mechanism applied to a high-load working condition, which comprises an oil
pipe four-way
assembly, two connecting flanges are symmetrically arranged at the upper end and the lower end of the oil
pipe four-way
assembly, and the connecting flanges are connected with the oil
pipe four-way
assembly through a plurality of connecting screws which are inserted in a penetrating manner. The double-step inner locking ring is arranged between the hanger body and the oil pipe four-way assembly, the double-step design is adopted in the double-step inner locking ring, and an outer locking ring is changed into the inner locking ring, so that the defects of a traditional locking ring can be effectively overcome; the inner locking ring is in a
closed state in the whole process of installation and
tripping-in, so that the risk that the hanger cannot be installed in place is reduced to the maximum extent, tightening and folding of the locking ring are facilitated, and the inner locking ring is suitable for being used in more complex working conditions.