The Top Drive
Cementing Head is constructed for use of a top drive system. Its purpose is to
enable Drill Pipe Dart and Setting Ball release at the surface at a defined
time during cementing operations. Accordingly, there is no need to open the
drill pipe to launch the cementing accessories.
The Top Drive Cementing Head consists of a body with an integrated dart
container and one or two quarter turn activation valves. Depending on the
application multiple Darts can be used. Further, it provides a bypass channel
to allow circulation with fluids while the Ball/Dart/s is/are loaded in the
container. Because of the internal bypass channel external valves or manifolds
are not required. Once a Ball/Dart is launched a Flag Sub Indicator gives a
positive indication about dropping. A heavy duty swivel with ANSON connection
provides free rotation during cementation. The API standard tool joints
connection allows heavy weight liner jobs.
The Cementing Head is
also available for Kelly systems with the same features.