What is the difference between a single slip, double slip, and hold down slip liner hanger?
Every liner hanger has slips. These are case hardened wedges that, when activated, support the weight of the liner. The slips are arranged in a row around the outside of the liner hanger. In this way the weight of the liner is spread evenly around the liner hanger. As a rule-of-thumb any liner up to about 80,000 pounds can be supported by a Rigger liner hanger with a single row of slips. A double slip liner hanger has a second row of slips located below the first row. This allows the weight of the liner to be spread out over a larger area, thus reducing the load/sq. in. The total liner weight that a Rigger Engineering double slip liner hanger can support is between 250,000 and 300,000 pounds. Hold down slips are another type of slip arrangement where the hanger has a second row of slips that are opposed to the slips in the first row. This liner hanger is best used when the liner to be hung is less than 30,000 pounds. The hold down slips act to anchor the liner to the casing when runnin
