Which of the following is NOT a type of packer used in the oil industry?

• A. Compression set packer
• B. Drillable packer
• C. Hookwall packer
• D. Stabilizing packer

Answer: (D)

Packer tools seal off a section of the well to isolate zones and control pressure flow. Different packers set in different ways and are designed to create a reliable seal in the borehole or casing. A drillable packer is built to be run into the well and later retrieved by drilling it out, which is a clear packer type. A compression-set packer relies on applying axial compression to activate and compress its sealing element, producing the seal and holding pressure. A hookwall packer uses a setting profile or mechanism to latch and seal in place, serving the same sealing purpose in specific well threads or profiles. A stabilizing packer, on the other hand, is not used to seal or isolate; its role is to stabilize and centralize the tubular string in the borehole rather than provide a seal. Because sealing capability is the defining feature of a packer, the stabilizing packer isn’t considered a packer type, making it the one that does not fit.