Definition - What does Well Packer mean?
Well Packer is a device which is run into a borehole and has a lower initial outside diameter that externally expands and seals the borehole. The flexible elastomeric elements are applied when the packers expand. They are of two types, i.e., inflatable packer and test or production packer. The inflatable packers are set in cased or open holes and the production or test packers are used in cased holes. They can be run on pipe, coiled tubing or wireline. Some Well Packers are designed to be removed easily and others are permanent. The permanent Well Packers are made up of materials which are mill or drill out.
Petropedia explains Well Packer
Well Packers have four main features – Cone, Slip, Body or Mandrel and Packing element system. They are used for isolating the perforations of each zone in the wells having various reservoir zones. They are also used for protecting the casing from the produced fluids and pressure, squeezed perforations or casing leaks, temporarily abandoning or isolating the producing zones and abandoning sections of the corroded casing. They are designed for gripping and sealing against casing ID. Metal wedges known as slips are used to accomplish gripping and sealing and can be accomplished by the large and cylindrical rubber elements.
They are basically used in:
- Separating various zones
- Safety control of the subsurface
- Gas lift or artificial lift
- Eliminating heading and surging
- Protection of casing
- Isolation Well Packer