Hydraulic plug jar expander

The utility model provides a hydraulic plug jar expander is formed by two upper and lower semi -rings combination, is equipped with the hydraulic pressure support cylinder between two semi -rings, the semi -ring is equipped with the stake body, and stake body no. 1 is equipped with the identical foxing with jar body cross -section geometry, and the surface of foxing is equipped with the cushion, and the inboard of foxing is equipped with deep floor. The stake body props main strengthening rib including controlling two spinal branchs, props to be equipped with between the main strengthening rib at two spinal branchs and supports horizontal strengthening rib, and the side direction that supports main strengthening rib is equipped with the oblique strengthening rib of support meets with the foxing, the hydraulic pressure support cylinder set up between the main strengthening rib of the support of two upper and lower semi -rings. Hydraulic plug jar expander can support the ladle bowl fast, makes it reach the requ