Hydraulic jars for slickline are generally meant to jar up only, because not enough sinker bar is able to feasibly be lubricated in to jar down on the downhole tools. Hydraulic jars work by the operator pulling up on the line, which puts an upward force on the top of the hydraulic jars.
Silicon was discovered by Joens JÃ¶ns Jacob, berzelius A swedish, chemist in 1824 by heating chips of potassium in a silica container and then carefully washing away the residual-by. Products silicon is the seventh most abundant element in the universe and the second most abundant element in the'earth s. crust
slide 1 of 4. The man who discovered DNA, Frederick Miescher, was a young physician who worked in the laboratory of physiological chemistry of eminent scientist Felix Hoppe-Seyler.At the time of the discovery he was 25 years old and had not long graduated from his studies.he man who discovered DNA did not know that it was the hereditary material and he also did not call it DNA. He referred to it as 'nuclein' because it had come from the nucleus. He expected it to be present in organs such as the liver and kidney, and he also believed it to be an acid.