Abstract: The present application includes a tool configured to prevent bidirectional passage through a pipe or wellhead. The tool includes at least a housing and a latch. The housing is coupled to the wellhead. The housing has an interior volume in communication with an interior volume of the wellhead through an aperture. The wellhead has a central axis. The latch is pivotally coupled to the interior of the housing and oriented so as to pivot within a plane parallel to the central axis. The latch is configured to selectively enter and exit the interior of the wellhead between a first orientation and a second orientation. The tool may further include a tube to be coupled in axial alignment with the wellhead or pipe.

Abstract: The present application includes a tool configured to prevent bidirectional passage through a pipe or wellhead. The tool includes at least a housing and a latch. The housing is coupled to the wellhead. The housing has an interior volume in communication with an interior volume of the wellhead through an aperture. The wellhead has a central axis. The latch is pivotally coupled to the interior of the housing and oriented so as to pivot within a plane parallel to the central axis. The latch is configured to selectively enter and exit the interior of the wellhead between a first orientation and a second orientation. The tool may further include a tube to be coupled in axial alignment with the wellhead or pipe.

Abstract: A latch system configured to permit one-way automatic passing of a swabbing tool. The latch system having a housing in communication with a well bore and a latch assembly housing a latch member with a latch. The latch is configured to selectively translate through an aperture in the housing. The latch assembly utilizes a biasing member to selectively control the location of the latch. The biasing member is sealingly separated from exposure to discharge fluids within the housing. While in an extended position, the latch allows the removal of the swabbing tool from the well bore but prevents the passing of the swabbing tool from a swab tube.