IMPACT EXPANSION PIT WELL AS A PROCESS FOR SETTING AN IMPACT EXPANSION PIT

摘要

An expansible plug to be percussion anchored in a borehole that tapers outward at an inner end thereof comprising an expansible sleeve, expansible segments arranged at an expandable end of the expansible sleeve, an expander member for penetrating into a converging inner bore of the expansion sleeve to expand the expansible segments, and at least one spacing element arranged at an end side of the expansible segments.