Application of the large bore and high strength cable-through packer

For the technique of injecting water and extracting oil in one well and the technique of paraffin cleaning and prevention in thermal production well, a large bore and high strength cable-through packer is developed. Its bore size is 90.1 mm, expanding the annulus injecting and extracting channel. The packer body is made of 42 CrMo high strength alloy, making maximum hanging load reach 1 250 kN. The packer has been applied in seven wells in offshore fields, with one-off success in setting and verification, indicating that it is suitable for field process.