Pressure driving injector, used pipe column and multi-round layered pressure driving method

The invention relates to a pressure driving injector, a used pipe column and a multi-round layered pressure driving method. The pressure driving injector and the used pipe column comprise a main body, a connecting concave face is arranged at the top of the inner wall of the main body, the middle of the inner wall of the main body is slidably connected with the outer wall of a sliding sleeve, a soluble ball is arranged at the position, corresponding to the top of the sliding sleeve, in the main body, a plurality of clamping grooves are formed in one side of the sliding sleeve, and a shear pin is clamped in one clamping groove. According to the pressure driving injector and the used pipe column, multi-round layered pressure driving injection is achieved by forming a multi-round layered pressure driving method, a balance sliding sleeve and a pressure spring return mechanism are arranged in a multi-round pressure driving injector, the pressure driving injector is prevented from being accidentally started during l