Types of packers include expanding, compression, self-sealing, wedge-in, self-expanding, and combined These types are classified according to their working principle and structural characteristics
Expandable packer: A liquid at a certain pressure is applied to the inner cavity of the packer, so that its diameter is enlarged to achieve a seal. For example, the K331 thermal metal expansion packer uses a thermal metal material to push the sealant cartridge to expand due to thermal expansion when the temperature rises, and it is sealed.
Compression packer: compresses the seal to achieve a seal by applying tension or pressure to open the slip. For example, tension setting is the opening of the slip by applying a tension force to the tubing string, while mechanical setting is the opening and compression of the seal by the slip when the tubing is rotated.
Self-sealing packer: Relying on its own structural characteristics to achieve sealing, no external operation is required.
Wedge packer: The diameter of the packer is increased by the wedge to achieve a seal.
Self-expanding packer: Expands automatically under specific conditions to achieve a seal.
Combined packer: combines a variety of working principles and structural features to adapt to different working environments and needs.
Each type of packer has its own specific application scenarios and working principles, ensuring that different annular spaces can be effectively isolated and plugged in various operations of oil and gas wells, meeting the needs of drilling, cementing, testing, completion, water injection and other operations.