Patent ID: 6217260
Filing Date: 2001-04-17
Classification: E02D,E21B

Abstract:
A hydraulic expanding apparatus for forming a side cavity in a hole comprising:a hydraulic expanding head for forming said side cavity in the hole, said hydraulic expanding head havinga plurality of bow pressing arms pivotably connected to a connecting block;a hydraulic positioning device that locates the expanding apparatus at a desired position in the hole to form the side cavity; anda uni-directional pulling type bi-directional cylinder for controlling operation of the hydraulic expanding head;a depth measuring system attached to said hydraulic expanding head that senses a depth at which the expanding head is positioned in the hole and that generates a signal corresponding to the depth;an automatic hydraulic revolving device rigidly connected to said hydraulic positioning device so as to rotate the hydraulic revolving device in the hole at the desired position for forming the side cavity; andan automatic control hydraulic center that is located outside the hole and processes data transferred from said hydraulic expanding head.