Purpose
The AR Tubing Stop can be set in the tubing strings that do not have upsets, integral joints where couplings do not exist. It offers a more secure and greater positive barrier than a conventional slip type stop.
Applications
Can be set in a wellbore to provide a platform for numerous wireline operations. It is useful for plunger lift operations or as a safeguard to prevent debris from falling into the wellbore.
Operation
The ratchet slip type tubing stops are latched into a jar down to shear pulling tool or a slip stop running tool and attached to the tool string.
The stop is lowered down the tubing slowly until desired depth has been reached, then the tool string is accelerated downward rapidly. The velocity forces the slip to travel up the tapered slip mandrel (body), setting them against the tubing wall. At the same instance the ratchets in the slip carrier move over the serrated teeth on the body and lock in place at the point where the slips are Jar down to ensure the slips and ratchets are securely set. This will also shear the jar down pulling tool setting the stop.
Pulling the slip type tubing stop is done by attaching a pulling tool to the
tool string and lowering it to stop depth and latching the stop. Once the
stop is latched, jarring upward will unseat the stop, and shear the ratchets for
removal from the wellbore.
Precautions
Slip type tubing stops require velocity for setting, making precise setting depths difficult to achieve.
