دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The tool that not fishes junk directly but just changes the condition of the junk to make it convenient for fishing.

n: a long, cylindrical container fitted with a valve at its lower end, used to remove water, sand, mud, drilling cuttings, or oil from a well in cable-tool drilling.

n: A long, cylindrical container, fitted with a valve at its lower end, used to remove water, sand, mud, oil, or junk and debris from a well.

a hollow tube with a trap door or ball seat, run on wireline, which can be used to spot or remove solid material from a well bore.

n: a fishing accessory run above a bit or a mill to recover small, nondrillable pieces of metal or junk in a well.

n: see junk sub.

n: a device made up in the drill stem above the mill to collect bits of junk ground away during a milling operation. During milling, drilling mud under high pressure forces bits of junk up the narrow space between the boot sub and hole wall. When the junk reaches the wider annulus above the boot sub and pressure drops slightly, the junk falls into the boot sub. A boot sub also can be run above the bit during routine drilling to collect small pieces of junk that may damage the bit or interfere with its operation. Also called a junk sub or junk boot.

a device run in the drill string just above the mill to catch cuttings.

n: The tool for fishing the junk in the wellbore in cable drilling.

n: a bladed tool used to scrape away junk or debris from inside casing;it is usually run into the casing on drill pipe or tubing.

n: A tool for cleaning crud of inside wall of casing. The blade with sword is installed in the cavity of cage. The blade clings the pipe wall because of leaf spring.

a downhole tool with scraping teeth and brushes that is used to remove perforating burrs, “lipped down” areas in connection pins and remove mill scale, dried mud or cement, pipe dope and other well completion debris.

n: the theory that the earths landforms assumed their present configuration in a brief episode at the beginning of geologic history-possibly in a single great catastrophic event-and have remained relatively unchanged since that time. Compare uniformtarianism. catcher n: a device fitted into a junk basket that retains the junk picked up by the basket catch samples v: to obtain cuttings for geological information as formations are penetrated by the bit The samples are obtained from drilling fluid as it emerges from the wellbore or, in cable-tool drilling, from the bailer. Cuttings are carefully washed until they are free of foreign matter, dried, and labelled to indicate the depth at which they were obtained.

n: The fishing tool of catching the junk directly.

n: A device fitted into a junk basket and acting as a trap door to retain the junk.