Cement Squeeze Operations
Weatherford offers a one-trip system for performing coiled-tubing (CT)-conveyed, cement-squeezing applications in monobore wells.

The FH one-trip retainer system uses an FH cement retainer and an FH one-trip setting tool. The system allows the cement retainer to be set hydraulically and squeezed through in one trip. The FH cement retainer can be tested before cementing and features options such as a slide-valve bottom, dart-valve bottom, and ball check. When accurate depth correlation is critical, the FH cement retainer can be run on an electric line using the dart-valve or ball-check bottom, while the stinger is run on a separate trip to perform the squeeze.

Once the retainer is set, injection is established into the zone and the cement squeeze can be performed. If cement must be circulated to the tool, the dart-valve or ball-check bottom must be run on the FH retainer. In this application, the stinger on the FH setting tool can be released from the FH retainer, and cement circulated to the tool and stung back into the retainer. Once the squeeze is completed, tension applied to the work string releases the stinger/setting tool from the retainer and closes the slide valve (if provided). Ball- and dart-type bottoms close squeeze pressure from below only. Slide valves hold from both directions.

This system is recommended for monobore applications when the FH cement retainer is to be set in the production tubing or liner.