The basic structure and principle of a packer

The packer mainly consists of a setting mechanism, a locking mechanism, a releasing mechanism, a rubber cylinder, and connecting components.

A packer is a downhole tool that separates different oil and water layers in the wellbore and can withstand a certain pressure difference. This tool meets the requirements of oil extraction technology, can be lowered to the predetermined position of the wellbore, sealed tightly, and has durability underground. It can be smoothly lifted out of the surface when needed, and can also be used in multiple stages.

Each type of packer can operate under a given method and load, ensuring that the packer is always in working condition. This operation is called the setting of the packer.

When it is necessary to lift the packer, releasing the working state of the packer according to the given method and load is called unsealing.

The operation of verifying the sealing performance of a packer after sealing at a predetermined position underground is called sealing verification.