دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a tank or vessel through which liquids or gases are passed to ensure steady flow and to eliminate pressure surges.

n: a device employed with a packer or to clean open perforations by allowing surges of pressure to enter the perforations. Also called a surge disk.

a pressure higher than the hydrostatic column, below the BHA produced by rapid movement of pipe into the well. Maximized in cases with large diameter tools, high viscosity and high pipe speeds. May cause fracturing. Opposite of swabbing.

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

the valve at the top of the tree, above the flow cross or flow Tee. The lubricator for interventions may be attached above this valve or the valve may be removed to fit a larger lubricator.

n: downward bend in a pipeline to conform to a dip in the surface of the rightof- way or to the contours of a ravine or creek. swage n: a solid cylindrical tool pointed at the bottom and equipped with a tool joint at the top for connection with a jar. It is used to straighten damaged or collapsed casing or tubing and drive it back to its original shape. v: to reduce the diameter of a rod, a tube, or a fitting by forging, hammering, or other method.

n: an instrument used to measure an ocean currents velocity. It can be adjusted to be neutrally buoyant and to travel at a specific density level. It is dropped into the water to travel with a current, and its journey is tracked by a pinger.

a displacement. In the reservoir a sweep is displacement of a hydrocarbon fluid from a reservoir rock by a flooding fluid. In the wellbore, a sweep is a viscous pill circulated around to help clear the wellbore of cuttings or debris.