Specification 11D1 provides requirements for packers and bridge plugs for use in the petroleum and natural gas industry. Application of this International Standard is limited to those products meeting the definition of a packer or ridge plug intended for petroleum and natural gas industry subsurface operations.

This International Standard applies only to product applications within a conduit. Installation and maintenance of these products is outside the scope of this document.

This edition of API Spec 11D1 is an adoption of ISO 14310:2001 with the addition of an API Monogram Annex.