Circulation/Squeeze Cementation Repair/ Remedial
Circulation repair cementation is used when cement behind casing has a poor CBL and zonal isolation is required.
The casing is perforated in two places, a retrievable packer is set between the perforations and a circulation test is carried out.
If circulation is possible at a sufficient rate, a cement retainer is set in a position between the perforations and cement circulated behind the casing.
The cement retainer is drilled out later, together with the cement inside the casing.
If no adequate circulation can be established . . .