دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a percussion tool run on a fishing string to jar downward or upward on a stuck fish to knock it free. The bumper sub body moves up and down on a mandrel.

n: A drilling tool consisting of a short stroke slip joint that allows a more constant WOB when drilling from a floating rig.

n: a device made up on a fishing string that drills a formation core surrounding and containing the fish to be retrieved. It has two sets of catchers: one to break off the drilled core, and another to form a basket below the core and the fish.

n: a fishing tool that uses fingerlike catchers to gather and trap junk at the bottom of the hole for retrieval. Aso called a poor-boy junk basket.

n: the thin nipple with claw tooth on the lower end ,connected with the lower end of fishing string and lower to the bottom to fish the fallout

n: the procedure of recovering lost or stuck equipment in the wellbore. See fish. fishing assembly n: seefishing string.

n: The application of tools, equipment, and techniques for the removal of junk, debris, or fish from a wellbore. The key elements of a fishing operation include an understanding of the dimensions and nature of the fish to be removed, the wellbore conditions,

n: an assembly of tools made up on drill pipe that is lowered into the hole to retrieve lost or stuck equipment. Also called a fishing assembly.

n: the drilling pipe whith fishing tools

n: a device run on wireline into the wellbore and inside the fishing string and fish to locate the area where a fish is stuck. When the drill string is pulled and turned, the electromagnetic fields of free pipe and stuck pipe differ. The freepoint indicator is able to distinguish these differences, which are registered on a metering device at the surface.

n: a hydraulic tool used in conjunction with a jar and made up on the fishing string above the jar to increase the power of the jarring force.

n: the tool of jam release and prevent sticking that using the shocking foce to the tubing in the hole .



a hydraulic tool used in combination with a jar to increase the impact of the jar on the fish.

n: a device made up on the bottom of the fishing string to catch and retrieve pieces of junk from the bottom of the hole.

n: a cyclindrical tool designed to retrieve junk or foreign objects loose in a wellbore.

may also be called a Jet Basket: a device with nozzles and a basket or catch basin to catch smaller pieces of junk stirred up by circulation.

n: a hydraulically operated tool that is run in above the fishing tool and anchored to the casing by slips. It exerts a strong upward pull on the fish by hydraulic power derived from fluid that is pumped down the fishing string.

n: A slickline or coiled tubing tool used to retrieve temporary devices, such as plugs and flow-control equipment, from the wellbore. Pulling tools are available in a range of sizes and profiles and must be compatible with the equipment to be retrieved. A co

n: a device used in fishing for drill pipe. If the upper end of the lost pipe is leaning against the side of the wellbore, the wall hook centers it in the hole so that it may be recovered with an overshot, which is run on the fishing string and attached to the wall hook.

n: A fishing assistant tool be used to fish the lost drill string ,which can help to centralizing the drill string .

a device at the bottom of an overshot for centering the upward looking end of pipe that may be laying against the casing. The hook may resemble a finger or strip of metal pointing clockwise and used with pipe rotation to surround and center the pipe.