79078727
Nov 18, 2009
Jul 26, 2011
Active Trademark
well tools for perforation of well pipe wall aimed at sealing off water and gas leaks in wells, namely, a combined perforating and sealant injection machine equipped with puncher charges for perforation of well pipe walls and an injection module that releases sealants from a canister carried inside the tool into the annulus outside the casing; structural parts for the aforementioned goods
Machinery