Well wall stabilizing device

The utility model discloses a well wall stabilizing device which comprises a mud compensation box and a stabilizing assembly, the stabilizing assembly comprises a sealing ring cover and a supporting ring plate, the bottom end of the supporting ring plate is fixedly connected with a well wall adaptive sleeve, and a plurality of arc plate units which are sequentially and rotationally connected are arranged in the well wall adaptive sleeve. Each arc plate unit comprises a connecting arc plate and a connecting clamping plate which are integrally formed, an assembly sleeve is integrally formed at the top of one side of the connecting arc plate, an assembly supporting column is integrally formed at the bottom of the other side of the connecting arc plate, and a sleeve pin rod is welded to the top end of the assembly supporting column; and the sealing ring cover is fixedly mounted at the top ends of the plurality of connecting clamping plates. According to the well wall stabilizing device, the mud compensation box i