Mechanical liner drilling cementing system

摘要

A packer setting tool sets a liner top packer by mechanical rotation of the running tool and set down weight following cementing of a liner. The packer setting tool includes a tubular release body mounted on an end of the running tool. An annular dog sub circumscribes a portion of the release body. The dog sub is linked to the release body with a shear screw. A thread on an outer surface of the release body engages a thread on an inner surface of the dog sub to define a threaded connection between the dog sub and the release body. When the running tool rotates, the thread on the release body rotates with respect to the thread on the dog sub driving the release body in an axial direction fracturing the shear screw and urges an adapter sleeve against the packer assembly to set the packer assembly.

主权项

1. A packer setting tool for use with a running tool, the packer setting tool comprising:
a tubular release body mounted on an end of the running tool and insertable into a wellbore; an annular dog sub supported within the wellbore that circumscribes a portion of the release body and linked to the release body with a shear screw; a thread on an outer surface of the release body engaged with a thread on an inner surface of the dog sub to define a threaded connection; and a tubular adapter sleeve mounted on an outer surface of the release body and having an end configured to interfere with a packer assembly, so that when the running tool rotates, the thread on the release body rotates with respect to the thread on the dog sub to drive the release body in an axial direction that fractures the shear screw and urges the adapter sleeve against the packer assembly to set the packer assembly; an actuation ring circumscribing the tubular release body, wherein the inner surface thread of the dog sub is an inner surface of the actuation ring; and at least one do secured to the actuation ring with a shear screw so that when the running tool pulls axially upwards the shear screw fractures and the at least one dog urges radially inward into a dog recess defined in an outer surface of the actuation ring to release the dog sub from the packer assembly.