Packer

Abstract

The packer comprises an upper connector, a lower gauge ring, an upper core shaft, a piston outer barrel and a slip limiting sleeve, a rubber barrel core shaft is arranged on the inner side of the right end of the upper connector in an embedded and attached mode, and an end rubber sleeve and a middle rubber sleeve are arranged on the right side of the upper connector; the lower gauge ring is located on the outer side of the right end of the rubber cylinder mandrel, and the outer side of the lower gauge ring is connected with a locking ring outer cylinder in a nested mode. The upper core shaft is arranged on the inner side of the lock ring outer cylinder, and the slip shaft body is arranged on the outer side of the middle of the upper core shaft. The piston outer cylinder is located on the outer side of the right end of the upper core shaft, and the piston outer cylinder and the inner side of the upper core shaft are connected with a lower core shaft in an attached mode. The packer is a one-way slip and can be matched with an upper hydraulic anchor to achieve two-way anchoring, setting is a double-piston effect, setting is reliable, the sealing capacity of the packer is high, sealing loss is not prone to occurring, pressure transmission of the packer is facilitated, entrapment pressure space is not prone to being formed, and accidental damage to mechanism parts is not prone to occurring, and the packer is suitable for a deep well and an in-well environment with the high mud specific gravity.

Description

technical field [0001] The invention relates to the technical field of packers, in particular to a packer. Background technique [0002] In the cementing construction and oil production engineering of oil and gas wells, packers are often used to prevent oil, gas, water, etc. Isolate and improve cementing quality; [0003] The existing packers still have some problems during use, such as; [0004] 1. In the process of use, it is generally not possible to cooperate with the upper hydraulic anchor to achieve two-way anchoring. The setting seal is often a single-piston action, and the anchor setting seal is unreliable; [0005] 2. In the process of use, the general sealing ability is limited, and it is easy to lose the seal; [0006] 3. During use, it is generally not convenient to transmit pressure to the packer, and it is easy to form a trapped pressure space and cause accidental damage to mechanism parts. It is not suitable for deep wells and wells with high mud specific g...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a packer to solve the problem of the existing packer proposed in the above-mentioned background technology. During use, it is generally not possible to cooperate with a hydraulic anchor to achieve two-way anchoring, and the setting seal is usually a single-piston action , the anchor setting seal is unreliable, the sealing ability is limited, and it is easy to lose the seal. It is generally not convenient to transmit pressure to the packer, and it is easy to form a trap pressure space and cause accidental damage to the mechanism parts. It is not suitable for deep wells and mud specific gravity. The problem of high well environment

Images