A hydraulically and mechanically releasable setting tool

Abstract

The invention relates to a hydraulically and mechanically releasable setting tool, which belongs to the field of downhole operation tools for oil and gas wells. The setting tool includes a mandrel, a setting pup joint, an upper joint and a ball seat pup joint; one end of the upper joint is installed with a setting pup joint, the inner thread of the upper joint is equipped with a protective cover, and the seat on one side of the end of the protective cover is installed. There is a mandrel installed on the internal thread of the sealing pup, and a lock block is installed between the mandrel and the setting pup. On one side of the lock block, a piston is installed on the mandrel at the end of the setting pup. The setting tool can be repeated many times. In use, the outer cylinder of the piston is fixed by a step that is short-circuited between the separation ring and the setting seal. During maintenance, the set screw fixed between the pressure caps of the outer cylinder can be directly removed to realize the operation. Compared with the traditional fixed piston outer cylinder through threaded connection, it can prevent the repeated disassembly and wear of the connecting thread during tool maintenance, resulting in the problem that the parts cannot be used, and the operation is simple, which increases the reliability of the setting tool.

Description

technical field [0001] The invention relates to a hydraulically and mechanically releasable setting tool, which belongs to the field of downhole operation tools for oil and gas wells. Background technique [0002] In the downhole operation of oil and gas wells; the top packer is one of the important parts of the gravel packing sand control string. It cannot be set in advance, and can be solved by lifting, lowering, and rotating after encountering resistance or jamming; after the top packer is set, the setting tool should be able to be released smoothly to provide fluid channels for subsequent gravel packing operations; The setting tool is reusable and easy to assemble, repair and maintain. However, the current setting tools matched with the top packer have the following deficiencies: 1. They can only be released mechanically or hydraulically, with a single method and poor reliability; 2. Torque cannot be effectively transmitted when the pipe string is running; 3. There is n...

AI Technical Summary

Problems solved by technology

However, the current setting tools matched with the top packer have the following deficiencies: 1. They can only be released mechanically or hydraulically, with a single method and poor reliability; 2. Torque cannot be effectively transmitted when the pipe string is running; 3. There is no protection against The top packer is set in advance, and it is easy to set in advance when it is stuck; 4. The structure is unreasonable, and the repair and maintenance are difficult and costly

These factors greatly affect the construction efficiency and reliability, poor adaptability

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