(under the class definition) Devices comprising means for preventing relative movement between two parts and manipulable to permit relative movement, or means to permit relative movement and manipulable to prevent relative movement, the change in condition between movement prevention and movement permission being for the purpose of enabling operation of some device in a well (e.g., setting a packer) and the two parts always remaining connected in the well by other means.
(1) Note. Devices which include mere end stops to limit motion are not included in this subclass. See subclass 241.1 for centering devices which include stops for limiting the sliding movement of the centering means on their supports.
SEE OR SEARCH THIS CLASS, SUBCLASS:
63, and subclasses there noted, for well devices with detents released by an explosive means.
162+, and subclasses there noted, for well receptacles with latch devices for valves and closures.
182, and 198, for detents holding the telescopic supports of packers or plugs locked in order to hold the packers or plugs expanded.
206+, and subclasses there noted, for expansible anchors coacting with a pre-positioned conduit. 216, for devices comprising an expanding anchor and friction drag with a detent means to prevent setting of the anchor till a desired location is reached.
241.1+, and subclasses there noted, for centering devices.
332.1+, and subclasses there noted, for valve devices with actuating means engaging the well bottom, an obstruction or wall.
SEE OR SEARCH CLASS
74, Machine Element or Mechanism,
2+, and 527+ for trips and detents of general utility.
