From: Dictionary of American Naval Fighting Ships

Casinghead is an oil field term which signifies the means by which several sizes of casing are tightly connected below the derrick floor at the top of the hole.

cl. Bullwheel

Casinghead (YO-47) was launched 25 April 1942 by Lake Superior Shipbuilding Co., Superior, Wis.; sponsored by Mrs. F. A. Russell; and commissioned 12 November 1942, Lieutenant E. J. Randle, USNR, in command.

Casinghead sailed by way of the St. Lawrence Waterway for Boston to complete her fitting out, then continued on to Norfolk, arriving 1 February 1943. She fueled and de-fueled ships at the Norfolk Navy Yard, and transferred fuel to and from storage areas until 19 October when she got underway for the Pacific. She arrived at Pearl Harbor 3 December and fueled ships in the Hawaiian area, as well as carrying oil to the outlying areas of Canton, Johnston, and Palmyra. In May 1945 she sailed west to base at Eniwetok, and in September she arrived in Tokyo Bay, Japan, to fuel the occupation fleet.

Casinghead has remained active with the Fleet, based at Yokosuka, Japan, as a yard oiler. On 23 July 1947 she was placed out of commission, and from that date remains in an in-service status.