ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,848, issued on March 17, was assigned to Halliburton Energy Services Inc. (Houston).

"Pressure collapsible closed cellular swell packer" was invented by Chad W. Glaesman (Singapore) and Sandeep Thatathil (Singapore).

According to the abstract* released by the U.S. Patent & Trademark Office: "Swell packer assemblies for providing a physical barrier inside a wellbore, and methods of using such swell packer assemblies, are provided. In one embodiment, the swell packer includes a substantially tubular member; and a seal element disposed on the substantially tubular member, the seal element including an elastomeric swellable material that comprises: a closed cell material having a pl...