Separable one-trip perforation and gravel pack system and method

A system for perforating and gravel packing a wellbore casing in a single trip into the wellbore, said system comprising:

• a gravel packer assembly having a production screen and at least one packer, wherein said gravel packer assembly is connected to a pipe string for running said system into the wellbore;
• a perforating apparatus connected to said gravel packer assembly, wherein said perforating apparatus is detachable from said gravel packer assembly after said system is placed in the wellbore and before a detonation of said perforating apparatus;
• a tool having at least one casing engaging slip segment, wherein said tool is matable with said perforating apparatus, and wherein said tool is settable in the wellbore casing;
• a release mechanism that releases said tool from being set in the wellbore casing;
• and
• a tube that extends between said gravel packer assembly and said perforating apparatus, whereby a drop bar is guided from said gravel packer to said perforating apparatus.

A system for perforating and gravel packing a wellbore casing in a single trip into the wellbore, said system comprising:

• a gravel packer assembly;
• a first coupling device connected to said gravel packer assembly;
• a perforating apparatus;
• a second coupling device connected to said perforating apparatus, wherein said first and second coupling devices detatchably couple together;
• a casing engaging tool, wherein said tool is connectable to said perforating apparatus;
• and
• a release mechanism of the casing engaging tool.