Patent ID: 9689237
Date: 2017-06-27
CPC Classifications: E21B

Claim:
1. A process for sealing a borehole having a borehole wall, said borehole containing a casing with an inner wall and an outer wall wherein an annulus is formed between said outer wall and said borehole wall, the process comprising: a. introducing into said casing a first assembly at a first setting depth, said first assembly having a perforating gun and configured to allow fluid flow through said first assembly only in a direction towards said perforating gun; b. moving said first assembly from an unset position to a set position in which it engages said inner wall of said casing; c. introducing into said casing a second assembly at a second setting depth; d. moving said second assembly from an unset position to a set position in which said second assembly engages said inner wall of said casing; e. applying fluid pressure through said first and second assemblies to said perforating gun so as to initiate said perforating gun to produce perforations in said casing; f. introducing a sealing fluid through said first and second assemblies into said annulus such that a portion of said sealing fluid remains in said first and second assemblies; g. preventing fluid flow through said second assembly; and h. thereafter, introducing additional sealing fluid above said second assembly.