Definition of secede - withdraw formally from membership of a federal union, an alliance, or a political or religious organization Definition of secede - withdraw formally from membership of a federal union, an alliance, or a political or religious organization
A shell casing is a piece of ammunition that is made of metal. It is often brass, but it can be made of other metals as well, and the more durable the better. Shell casings can be made from any kind of ammunition that is fired from a pistol, rifle or shotgun. It is not a bullet, but it is a piece of the larger ammunition mechanism that is loaded into the chamber to be shot.
Casing provides locations for the installation of: Blowout preventers; Wellhead equipment; Production packers; Production tubing; The cost of casing is a major part of the overall well cost, so selection of casing size, grade, connectors, and setting depth is a primary engineering and economic consideration. Casing strings