دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a hollow, rubber-faced cylinder mounted on a hollow mandrel with a pin joint on the upper end to connect to the swab line. A check valve that opens up- ward on the lower end provides a way to remove the fluid from the well when pressure is insufficient to support flow. v: 1. to operate a swab on a wireline to bring well fluids to the surface when the well does not flow naturally. Swabbing is a temporary operation to determine whether the well can be made to flow. If the well does not flow after being swabbed, a pump is installed as a permanent lifting device to bring the oil to the surface. 2. to pull formation fluids into a wellbore by raising the drill stem at a rate that reduces the hydrostatic pressure of the drilling mud below the bit.

reducing the well pressure below the swab tool by rapid upward movement of a tool or equipment in a wellbore. Swabbing may be intentional using a wireline swab cup tool to lift water or unintentional by fast movement of a pipe or wireline conveyed, large