A system and method for carrying out simultaneous operations of assembling, dismantling, and maintaining equipment installed by an oil rig, using the tools, systems, and the areas available on the rig itself. The first rod is slidably engaged within the handle and includes a hook at its outer end. The feedback-canceller apparatus is configured to store the set of filter coefficients. A method of preparing an adhesive composition comprising copolymerizing a first monomer comprising pendant dihydroxy-protected dihydroxyphenyl groups; deprotecting the dihydroxy-protected dihydroxyphenyl groups; crosslinking the dihydroxyphenyl groups with a crosslinking agent. The slidable mechanism includes at least one extension arm with a second slant.