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
WHO invented the first computer? The answer will surprise you: it was Charles Babbage, in the year 1832. Babbage, who was born in London in 1791, was a great mathematical genius. He was a natural inventor, and invented all sorts of new products. When he finished school, he went to study mathematics at Cambridge University.