دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. the high-pressure spraying of the crude oil cargo to dislodge or dissolve clingage and sediment from the walls, cross members, and lines in the compartments of a vessel during the unloading operation. 2. the use of a high-pressure water stream to dislodge clingage and sediment from the bulkheads, bottoms, and internal structures of a vessels cargo tanks.

forced circulation of fluid through the perfed interval with the intent of generating communication between perforations or intervals.

n: 1. excessive wellbore enlargement caused by solvent and erosional action of the drilling fluid. 2. a fluidcut opening caused by fluid leakage.

flow cutting of equipment downhole.

an enlarged area of the wellbore caused by removal of formation grains during drilling or circulation.

n: the operation during which stuck drill stem or tubing is freed using washover pipe.

n: see washover pipe. washover back-off connector n: a fishing tool that is made up in a length of washover pipe connected to the top of the fish once the washover is completed, and then backed off the fish, thus enabling the washed-over part of the fish to be retrieved. The tool permits washover, back-off, and pulling to be carried out in one round trip.

n: In fishing operations, a large-diameter pipe fitted with an internal grappling device and tungsten carbide cutting surfaces on the bottom. The washover pipe can be lowered over a fish in the wellbore and to latch onto and retrieve the fish. Since the wash

n: A kind of fishing tool fixed in the washover pipe.

using a overshot tool and circulation to remove debris above and from around a fish and grip the fish with the overshot.

n: an accessory used in fishing operations to go over the outside of tubing or drill pipe stuck in the hole because of cuttings, mud, and so forth, that have collected in the annulus. The washover pipe cleans the annular space and permits recovery of the pipe. It is sometimes called washpipe.

n: In fishing operations, a large-diameter pipe fitted with an internal grappling device and tungsten carbide cutting surfaces on the bottom. The washover pipe can be lowered over a fish in the wellbore and to latch onto and retrieve the fish. Since the wash

a recovery tool that fits over the OD of the lost pipe.