The invention relates to the technical field of oilfield cementing equipment, and discloses a hydraulic expansion packer. The hydraulic expansion packer comprises a
coupling, and a center tube is fixedly sleeved on the lower portion of the inner surface of the
coupling. According to the hydraulic expansion packer, T-shaped grooves and T-shaped keys are formed to be matched for installation, the T-shaped keys are installed to plug sections of a first rubber sleeve into the T-shaped grooves, one expansion cavity between the first rubber sleeve and a rubber cylinder is separated, and each partition expansion cavity is provided with a communication hole in a matched manner; liquid injected from a
pressure injection channel is injected into each expansion cavity through a hole plugging channeland the communication holes, when the
hydraulic pressure reaches a certain degree, the
pressure injection channel is sealed to stop injecting the liquid, at this time, the liquid is injected into thehole plugging channel, and the pressure is greater than the pressure at the
pressure injection channel, so that a rubber partition plate deforms to the communication holes and blocks the communicationholes, and the first rubber sleeve expand in sections after
liquid injection to avoid
mutual influence. After one abrasion, the whole equipment still has a good sealing effect, and the well sprayingof
petroleum at the bottom of a well is prevented.