Patent attributes
A packer arrangement for a sealed passage of a drillstring therethrough. The drillstring has geometric differences between passing drill pipes and joint couplings. The packer arrangement includes a packer holder which forms a housing with an axially through-going center passage which has a flexible packer sleeve arranged in a portion thereof, an external annulus which encloses the packer holder, an internal annulus, and two actuators which apply an axial tensile force to the flexible packer sleeve. The flexible packer sleeve has a center portion and two end terminations which are axially displaceable in the packer holder. The internal annulus is delimited by the center portion of the flexible packer sleeve and by the packer holder. The internal annulus is in a fluid communication with the external annulus. Each of the two end terminations is coupled to one of the two actuators, respectively.
