Suspension packer with two-way setting seal and its preparation method and wellbore circumferential isolation method

Abstract

The invention discloses a bidirectional seat seal hook-wall packer, a preparation method thereof and a shaft circumferential packing method. The packer comprises a central tube. The two ends of the central tube are respectively connected with a first joint and a second joint. A first stop collar, a first piston, a first slip, a first cone, a first rubber tube compression ring, a rubber tube, a second rubber tube compression ring, a second cone, a second slip, a second piston and a second stop collar are sequentially sheathed on the central tube from the first joint. A first hydraulic cylinder which is connected with the first joint is sheathed on the external side of the first piston. A first locking slip which is used for preventing the first piston from moving towards the first joint is fixedly arranged on the central tube. A supporting ring is arranged between the central tube and the rubber tube. A second hydraulic cylinder which is connected with the second joint is sheathed on the external side of the second piston. A second locking slip which is used for preventing the second piston from moving towards the second joint is fixedly arranged on the central tube. A first pressure transmission hole and a second pressure transmission hole which respectively correspond to the first piston and the second piston are arranged on the central tube. The packer disclosed by the invention can be reliably anchored.

Description

technical field [0001] The invention relates to the technical field of staged well completion reconstruction in oil and gas fields, in particular to a two-way set-sealing suspension packer, a preparation method thereof, and a wellbore circumferential sealing method. Background technique [0002] In the production process of oil and gas fields, the segmental stimulation technology of vertical wells or horizontal wells is an effective production stimulation measure for the efficient development of low-permeability oil and gas reservoirs, ultra-low permeability, ultra-low permeability, shale gas reservoirs and other unconventional oil and gas reservoirs. Due to the long horizontal section and strong heterogeneity of multi-layer vertical wells or single-layer horizontal wells, one-off general acidizing or fracturing is not targeted and often fails to achieve the purpose of stimulation. However, the use of open hole packers for staged completion and stimulation can take targeted ...

AI Technical Summary

Problems solved by technology

The existing suspension packer adopts a one-way hydraulic cylinder configuration. When the tool moves, the slips installed at the lower part break first, and then push the lower cone to move upward to squeeze the rubber tube, and then push the upper cone to move upward. , forcing the upper slips to rupture. The risks of this action are: 1. The rubber tube may be damaged when it moves after expansion, and cannot be effectively sealed to withstand high pressure

2. When the upper slips cannot be broken, the pipe string cannot be effectively anchored

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