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 … Circulation/Squeeze Cementation Repair/ Remedial

The main reasons for using remedial cementation procedures are to: abandon specific reservoirs in a multiple reservoir completed well seal off all perforations when abandoning a well to make sure crossflow between reservoirs is impossible repair defective casing or liner cement jobs repair casing leaks isolate specific zones within reservoirs (to achieve lower gas / … Introduction to Remedial Cementation

If good returns were obtained at surface/seabed during the primary cement job, the casing to the drive pipe annulus should be topped up as follows: RUN a 2” tubing string down to the annulus as far as possible and circulate. SLOWLY PUMP the cement slurry (Class G cement mixed with 1.5 % CaCl2 mixwater) in … Cement Remedial Grouting Procedure

The following 3 methods may be used in performing a squeeze cementation: Spot and Squeeze, Straight Squeeze and Circulation Squeeze. 1. The Spot and Squeeze or Block Squeeze method is the term used when cement is spotted over the required interval and the squeeze pressure is applied afterwards in order to force or “squeeze” the … Squeeze Remedial Cementing