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Slickline

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The introduction to this article provides insufficient context for those unfamiliar with the subject.Please help improve the article with a good introductory style. (January 2009)
Slickline is a term for a tool of conveyance used generally in oil and gas well servicing. Slickline looks like a long, smooth, unbraided wire, often shiny, silver/chrome in appearance. It comes in varying lengths, according to the depth of wells in the area it is used (it can be ordered to specification) up to 35,000 feet in length. Slickline is spooled onto a hydraulically controlled drum in the back of a wireline truck. The wireline truck is driven out to the wellsite, and specialized equipment designed to keep high pressure and well fluids contained, while allowing the slickline to run deep down the hole of the oil/gas well is 'rigged up'. Downhole tools, which are long, and tubular shaped, with various mechanisms on them, are lowered via the slickline to the appropriate depth, whereupon they carry out their tasks. The operator of the wireline truck controls the drum at surface, monitoring the depth which is measured from a surface point, and the weight, which informs the operator via a sensitive gauge attached to the wire what is happening downhole. Upon completion of that step of the job, they are pulled back to surface via the slickline, which generally stays attached to the 'toolstring'. Slickline comes in different grades, meant to maintain a balance between being strong enough to support the weight of itself, the toolstring, and restrictions encountered downhole without breaking, and also corrosive and dangerous gases and fluids that occur in oil and gas wells. Shiny slickline (ie: 316 Stainless Steel, GD 31 Molybdenum), depending on the metalurgy, is generally used for more corrosive wells, or wells with H2S poisonous gas, or CO2, which can drastically affect metal performance. Dark grey slickline (ie: plow steel), which has the colour of a new, grey nail, but which rusts easily, generally has a higher strength than the more exotic metalurgies of the same diameter; however, it is more adversely affected by bad well conditions and therefore is usually only used in 'sweet' wells. As well depths have increased over the years since the first measuring lines were brought into use, accompanied by increased working loads, it has become necessary to develop wireline having a high strength/weight ratio. This is known as slickline. There is a need for strength to accomplish the operation without the wire breaking, and a need to keep the diameter of the wire as small as possible for the following reasons:
It reduces the load of its own weight
It can be run over smaller diameter sheaves, and wound on smaller diameter spools or reels without overstressing by bending
It keeps the reel drum size to a minimum
It provides a small cross-section area for operation under pressure
The sizes of solid wireline in most common uses are: 0.108ins and 0.125ins diameter, and are obtainable from the drawing mills in one-piece standard lengths of 18,000, 20,000, 25,000 and 30,000 ft.
Contents
1 Uses
2 Braided line
3 Slickline Tools
3.1 Jar
3.2 Stem
3.3 Pulling tools
3.4 Gauge cutter
3.5 Lead impression block
3.6 Bailer
3.7 Running Tools
//
Uses
Slickline tools operate with a mechanical action, controlled from surface in the wireline trucks operators compartment. Typically, this mechanical action is accomplished by the operation of jars. There are generally two types of jars, mechanical and hydraulic. Mechanical jars look like a long, tubular piece of machined metal that slides longer or shorter approximately 75% to 90% of its total length. They give the effect of hammering on the downhole tools. The weight or hit of the 'hammer' depends on how much sinker bar is added above the jars. Generally, a slickline operator controls the downhole tools with taps and hits from the sinker bar via the mechanical jars, controlled at surface by lowering or raising the toolstring and monitoring weight, depth, and pressure. Mechanical jars for slickline can hit up or down the hole, making them a versatile form of jarring. Hydraulic jars for slickline are generally meant to jar up only, because not enough sinker bar is able to feasibley lubricated in to jar down on the downhole tools. Hydraulic jars work by the operator pulling up on the line, which puts an upward force on the top of the hydraulic jars. The bottom of the hydraulic jars is usually attached by threaded connection to the mechanical jars, which are attached to the downhole tools. Depending on how hard the operator pulls on the hydraulic jars will affect how fast they hit, and how hard they hit. when the top is pulled on, the inner mandrel begins to slide upwards. It has a restriction on it, that hydraulic fluid has to bypass as it is pulled upwards, until it...(and so on)

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7.62x54mmR

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(Redirected from 7.62x54R)

7.62x54mmR
Assortment of 7.62x54R rounds
Type
Rifle
Placeoforigin
Russian Empire
Service history
In service
1891resent
Used by
Soviet Union, former Warsaw Pact
Wars
Russo-Japanese war, World War I, Russian civil war, World War II, Korean war, Vietnam war, Afghanistan, Yugoslav wars, Gulf Wars,Iraq
Production history
Designed
1891
Produced
1891resent
Specifications
Casetype
Rimmed, necked
Bulletdiameter
7.92mm (0.312in)
Neckdiameter
8.53mm (0.336in)
Shoulderdiameter
11.61mm (0.457in)
Basediameter
12.37mm (0.487in)
Rimdiameter
14.40mm (0.567in)
Rimthickness
1.6mm (0.063in)
Caselength
53.72mm (2.115in)
Overalllength
77.16mm (3.038in)
Case capacity
4.16 cm3 (64 gr H2O)
Riflingtwist
240 mm (1 in 9.45 in)
Primertype
Berdan or Boxer Large Rifle
Maximum pressure
390MPa (57,000psi)
Ballistic performance
Bullet weight/type
Velocity
Energy
9.7g (150gr) Norma
900m/s (3,000ft/s)
3,939J (2,905ftbf)
10.9g (168gr) Barnaul FMJBT
812m/s (2,660ft/s)
3,593J (2,650ftbf)
11.7g (181gr) Norma Soft Point
785m/s (2,580ft/s)
3,605J (2,659ftbf)
Source: Chuck Hawks Accurate Powder Steves Pages

Chinese copper-washed, steel-cased, corrosive-primer 7.62x54mmR cartridge.

From left to right: Sellier & Bellot hollow point boat tail, "Czech silver tip", mild steel core, light ball, Hungarian silver/yellow-tip, mild steel core, heavy ball, Wolf Gold soft-point, USSR 1986 steel core light ball, Factory 60, Yugoslav surplus (1953), USSR 1940s lead core light ball
The 7.62x54mmR rifle cartridge is a Russian design dating back to 1891. Originally designed for the Mosin-Nagant rifle, it was used during the late Tsarist era and throughout the Soviet period, in machine guns and rifles such as the SVT-40. The Winchester Model 1895 was also chambered for this cartridge per a contract with the Russian government. It is still in use by the Russian military in the Dragunov and other sniper rifles and some modern machine guns such as the PKM. The round is colloquially known as the "7.62 Russian". The name is sometimes confused with the "7.62 Soviet" round, which refers to the 7.62x39mm cartridge used in the SKS and AK-47 rifles.
Contents
1 Background
2 Cartridge dimensions
3 Performance
4 Surplus ammunition
5 Factory ammunition
6 Synonyms
7 See also
8 References
9 External links
//
Background
The 7.62x54mmR is the oldest cartridge still in regular combat service with several major armed forces in the world. This round is mainly used in the Dragunov sniper rifle and PK machine gun. In general performance, it is in the same class as the .30-06 Springfield. Because of its ballistic closeness with the iconic American cartridge, a similarly rich military and historic heritage and amazing longevity, is often nicknamed "The Russian 30-06". It is also one of the few (along with the .22 Hornet, .30-30 Winchester and .303 British) bottlenecked, rimmed centerfire rifle cartridges still in common use today. Most of the bottleneck rimmed cartridges of the late 1880s and 1890s fell into disuse by the end of the First World War.
The 7.62x54mmR originally had a 13.7 g (210 grain) round-nosed full metal jacket (FMJ) bullet. Due to experiences in the Russo-Japanese War, it was replaced in 1908 with a 9.7 g (148-grain) spitzer FMJ bullet, which has remained standard to the present. To increase accuracy, the Dragunov SVD uses the 7N1 variant of the cartridge, which uses extruded instead of ball propellant and has a 9.7 g (152-grain) boat-tailed FMJ bullet. The 7N14 is a new load developed for the SVD. It consists of a 9.7 g (151 grain) projectile which travels at the same 850 m/s (2723 ft/s), but it has a lead core and is supposed to be the more accurate of the two.
The cartridge case presents a pronounced tapering to facilitate case extraction. In addition to being one of the first military rounds to use smokeless powder, the 7.62x54mmR was ahead of its time for another aspect, despite being a rimmed cartridge. The case is significantly wide in relation to its length and it features a rather sharp shoulder angle compared to other contemporary rounds. This characteristic and the case tapering allow for efficient and very rapid powder combustion, a design concept reintroduced again with the Short Magnum rifle cartridges more than 100 years later.
Large quantities of 7.62x54mmR military ammunition were made with steel cartridge cases. These perform well, but do not lend themselves nearly as easily as brass cases to the re-sizing necessary for...(and so on)

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