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A Swivel is a mechanical device used on a drilling rig that hangs directly under the traveling block and directly above the kelly drive, that provides the ability for the kelly (and subsequently the drill string) to rotate while allowing the traveling block to remain in a stationary rotational position (yet allow vertical movement up and down the derrick) while simultaneously allowing the ...
Simple diagram of a drilling rig and its basic operation. The kelly drive is #19. A kelly drive is a type of well drilling device on an oil or gas drilling rig that employs a section of pipe with a polygonal (three-, four-, six-, or eight-sided) or splined outer surface, which passes through the matching polygonal or splined kelly (mating) bushing and rotary table.
The 11th New York Infantry Regiment was an infantry regiment of the Union Army in the early years of the American Civil War.The regiment was organized in New York City in May 1861 as a Zouave regiment, known for its unusual dress and drill style, by Colonel Elmer E. Ellsworth, a personal friend of U.S. President Abraham Lincoln. [3]
The earliest combination guns were called swivel guns, (not to be confused with the more widely known small cannon that is mounted on a swiveling stand or fork and allows a wide range of motion) which used a set of barrels designed to rotate to allow either the rifled or the smoothbore barrel to line up with a flintlock mechanism before firing. [2]
Team of Rivals: The Political Genius of Abraham Lincoln is a 2005 book by Pulitzer Prize-winning American historian Doris Kearns Goodwin, published by Simon & Schuster.The book is a biographical portrait of U.S. President Abraham Lincoln and some of the men who served with him in his cabinet from 1861 to 1865.
Several machine collets (top and centre) and a dismantled pin chuck (below). Generally, a collet chuck, [3] considered as a unit, consists of a tapered receiving sleeve (sometimes integral with the machine spindle), the collet proper (usually made of spring steel) which is inserted into the receiving sleeve, and (often) a cap that screws over the collet, clamping it via another taper.
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