Patent 9334704 was granted and assigned to Halliburton on May, 2016 by the United States Patent and Trademark Office.
A wellbore bailer has a rotary motor coupling, a cylinder having an open end, and a pump in the cylinder coupled to the rotary motor coupling and configured to pump fluid when rotated via the coupling. A closure of the bailer is changeable between sealing and allowing flow through the open end.