Multi-port cementing head

摘要

A plug-dropping head P is capable of dropping balls 122 or plugs or other objects. The plug-droning head has a compact design with a cylinder 18 having multiple chambers 72 for storage of plugs and/or balls. The device can be actuated manually or automatically, locally or remotely, to rotate the cylinder to present a different bore in alignment with a flowpath through the housing. An exterior signal indicates that the object has fallen through the device. An indexing feature assures alignment of the individual bores in the cylinder which contain a plug or wiper with the main passage through the tool. Flow can be maintained through the tool as the cylinder is rotated via bore 108. Rotation of the cylinder allows an obstruction device 92 in the flowpath to move out of the way to allow the ball or plug to drop when sufficient alignment is reached.