Slickline Operations The term Slickline relates to the use of a wire or braided line to convey downhole tools or equipment in a wellbore. The first use of wire in a wellbore was as a measuring device. In the construction of the early wells dug by hand, sticks were used to measure depth. The stick was laid on the ground and the distance/length stepped off. Occasionally, for important measurements a surveyor’s chain would be used. To create a hole in the ground, early drilling operations used a po