Patent ID: 11885197
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 12:
13. A stage cementing tool for use in a wellbore comprising:
a casing, the casing and wellbore defining an annulus therebetween;
a mandrel having a plurality of first longitudinal slots defined therein and a plurality of second longitudinal slots defined therein connected in the casing, the plurality of second longitudinal slots spaced longitudinally from the plurality of first longitudinal slots;
a drive sleeve disposed in the mandrel;
a closing sleeve disposed about the mandrel and connected to the drive sleeve through the first longitudinal slots;
an opening sleeve disposed in the mandrel in a first position covering the first longitudinal slots to prevent communication from a central flow passage of the mandrel to the annulus;
a setting sleeve connected to the opening sleeve with a plurality of opening sleeve pins extending through the plurality of first longitudinal slots, a portion of the closing sleeve being sandwiched between the mandrel and the setting sleeve; and
a packer disposed about the mandrel, the drive sleeve engageable with the opening sleeve and operable to move the opening sleeve and the setting sleeve to a second position in which the setting sleeve moves the packer to a set position against the wellbore.