Importance

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Abstract

A cementing plug container for enclosing and injecting cementing plugs into the casing of an oil or gas well to reduce contamination on the interface between the well fluid and the cement, which container includes a shaped housing containing one or more plugs, a plug release mechanism for each plug, which release mechanism is characterized by an air cylinder and a cooperating plug support and release assembly which function to drop the plug or plugs from an upper interior segment of the housing into a lower interior segment or bore responsive to operation of the cylinder. Passage of the plug or plugs from the upper segment of the housing and through the cementing plug container assembly bore is noted by a plug pass indicator which is characterized by a rotatably-mounted wheel positioned in the interior of the housing and partially in the path of the plug, and a rack and gear mechanically coupled to the rotating wheel and designed to indicate when each cementing plug has contacted the wheel and moved through the bore of the assembly.

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First Claim