Hydraulic seat seal permanent open hole packer and open hole well-completion packing method

Abstract

The invention discloses a hydraulic seat seal permanent open hole packer and an open hole well-completion packing method, wherein the packer comprises a central spindle with an axial through hole, the central spindle is connected with a first joint at one end, is connected with a second joint at the other end, is sheathed with a left push slip, a first metal expansion bowl, a first assisting rubber barrel press ring, a first assisting rubber barrel, a first retainer, a main rubber barrel, a second retainer, a second assisting rubber barrel press ring, a second assisting rubber barrel, a second metal expansion bawl, a shearing ring, a piston and a stopping ring in sequence from the first joint, and is provided with a first pressure conduction hole and a first slip corresponding to the first left push slip, a support ring is arranged between the main rubber barrel and the central spindle, an outer barrel is sheathed outside the piston, is connected with the second joint at one end and is connected with the shearing ring at the other end, and the central spindle is provided with a second slip corresponding to the piston and a second pressure conduction hole positioned between the stopping ring and the piston. The hydraulic seat seal permanent open hole packer disclosed by the invention is fast and durable.

Description

technical field [0001] The invention relates to the technical field of staged reconstruction of open-hole completion of vertical wells or horizontal wells in oil fields, in particular to a hydraulic-sealing permanent open-hole packer and an open-hole completion sealing method. Background technique [0002] In the process of oil field production, the staged 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 s...

AI Technical Summary

Problems solved by technology

Among them, the expandable packer: its sealing performance is limited due to the pressure difference between the inside and outside of the rubber cylinder, and the ability to bear the pressure difference is generally low

Fluid-swellable packer: First, because the rubber barrel automatically expands slowly after encountering liquid, if there is a waiting to stop the operation during the running process, there is a risk of swelling when encountering liquid; second, the sealing performance is related to the type of downhole fluid and the amount of fluid There is a relationship, after the tool is put into the well, it needs to be given time to fully expand, so the construction period is long

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