Packer

Abstract

The invention discloses a packer which comprises a center pipe, a locking mechanism, an execution mechanism, a sealing mechanism and an anchoring mechanism, wherein the locking mechanism, the execution mechanism, the sealing mechanism and the anchoring mechanism are arranged outside the center pipe. The execution mechanism makes the sealing mechanism and the anchoring mechanism to act. The anchoring mechanism comprises a first cone, a second cone and a slip, wherein the center pipe is sleeved with the first cone, and the first cone is connected with the execution mechanism to be driven by the execution mechanism; the center pipe is sleeved with the second cone, and the second cone is located below the first cone; the second cone is connected with the center pipe through a shearing pin; an expansion piece is arranged on the second cone and can be expanded through the first cone in the radial direction of the center pipe; the length of the conical surface of the second cone can be increased through the outer wall face of the expanded expansion piece; and the slip is located below the second cone and can be expanded by the second cone for anchoring. The packer can be well suitable for casting deformation wells.

Description

technical field [0001] The invention relates to a plugging tool used for sealing off lower oil, gas and water layers in mines such as oil wells and gas wells, and in particular to a packer. Background technique [0002] Packers are widely used in oil wells, gas wells and other mines to seal off the lower oil, gas and water layers. It is a safe, reliable, low-cost, fully functional and widely applicable downhole plugging tool. The packer can be used in conjunction with other downhole tools for temporary, permanent, selective and snubbing operations. [0003] The removable packer is mainly composed of five parts: actuator, anchoring mechanism, locking mechanism, sealing mechanism and fishing mechanism. Among them, the actuator is used to realize the setting and unsealing. According to the setting power source of the actuator, the packer is mainly divided into two types: mechanical setting and hydraulic setting. The actuator realizes setting by cutting the setting pin. Unseal...

AI Technical Summary

Problems solved by technology

[0009] Furthermore, for casing-changing wells, after the ordinary packer is run in, it may not be able to be set or not set firmly because the inner diameter of the casing at the setting position becomes larger, or it may not be run into the casing due to the smaller inner diameter of the casing , which leads to the fact that ordinary packers cannot be applied to oil wells after the casing has shrunk, making it difficult to implement post-production stimulation measures for such oil wells, affecting the recovery rate of oil wells and limiting the production of such oil wells

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