Fracturing isolation sleeve

1. An apparatus adapted to be operatively coupled to a well having a production casing positioned therein, the apparatus comprising:

a first device having an internal bore;

a second device having an internal bore;

a fracture isolation sleeve disposed at least partially within said internal bores of said first and second devices, said fracture isolation sleeve having an internal diameter that is greater than or equal to an internal diameter of said production casing, wherein an end of said fracture isolation sleeve is adapted to sealingly engage a production casing bushing in said well, and wherein at least a portion of said production casing bushing is positioned in said second device;

a first seal between said internal bore of said first device and said fracture isolation sleeve;

a second seal between said fracture isolation sleeve and said production casing bushing; and

a profile formed in an outer surface of said fracture isolation sleeve, wherein said profile is adapted to be engaged to secure said fracture isolation sleeve in an operational position and wherein said profile in said outer surface of said fracture isolation sleeve is adapted to be engaged by a lock down screw.

2. The apparatus of claim 1 , wherein said fracture isolation sleeve is adapted to be retrievable through at least one device positioned above said first device.

3. The apparatus of claim 1 , wherein said first and second devices are adapted to be positioned adjacent to one another and coupled together.

4. The apparatus of claim 1 , wherein said first and second devices are adapted to be positioned spaced apart from one another and not coupled to each other.

5. The apparatus of claim 1 , wherein said first device comprises at least one of a adapter and a Christmas tree.

6. The apparatus of claim 1 , wherein said second device comprises a tubing head.