Packers systems are among the most important tools in the tubing string. The types of packer systems vary greatly. Often, they're designed or configured to meet specific wellbore or reservoir conditions, such as single-packer or tandem-packer configurations, single-tubing or dual-tubing strings, and the full range of pressure and temperature applications.
The basic requirement of packers systems and associated tools relates to flow from or injection into the formation to the tubing string or production conduit. The packer must enable efficient flow and must not restrict normal production or injection flow.