Debris Seal Cup Packer
Depending on the well application, there are often times where a debris seal is required to contain contaminants, or to isolate specific well zones from other zones within a well. When these two components are required on a removable well packer, the Debris Seal Cup Packer (DCP) is an economical and reliable choice.
In many thermal wells, the seal required, must be maintained during the movement of the packer within the liner it resides, due to thermal growth. Since most thermal packers require thermal growth movement or removal from the well, those that are fluid filled will fail in thermal conditions, and those that are cement filled or contain slips, are permanent.
The DCP will allow thermal movement while delivering a seal and debris containment. The DCP is made of an elastomeric compound and can be installed to the outside of the liner being run. The ID and OD of the DCP are custom built to fit both the liner size installed on, and the liner size it will reside in. The elastomeric cup packer design can sustain element wear while running in the hole, contain and maintain high pressure sealing in either direction, can be removed from the well bore, and are compatible in both thermal and cold wells.
The DCP is designed for easy installation to the OD of the liner being run. Predetermined depths are determined for either debris or zonal containment. The DCP are installed to the liner at these depths and are place in the direction that pressure sealing is required. More then one DCP can be installed to the liner at the same depths if required. The DCP have a built in drift diameter steel centralizer, which helps eliminate wear to the elastomeric element, while running in the hole. Once the DCP is in place, well pressure applied to the pressure side of the DCP, will seal the element to the casing wall it resides in, while the ID of the DCP (containing seals) seals to the casing it resides upon.