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Setting in tubing strings without upsets, typically integral joint where couplingsdo not exist.Setting in tubing strings where there is a need for a more secure and / orpositive barrier than a conventional Slip type stop.
Consists of eight parts:
3. Retainer Band
4. Slip Carrier
8. Set Screw
Set in wellbore to provide a platform for numerous wireline operations,plungerlift, or as a safeguard to prevent debris from falling down the wellbore.
Used where there is a need to retrieve stops from below profile nipples wheresmaller diameters will not accommodate A Type Slip Stops.
The Ratchet slip type tubing stops are latched into a jar down to shearpulling tool and / or a slip stop running tool and attached to the tool string.The stop is lowered down the tubing slowly until desired depth has beenreached, the tool string is accelerated downward rapidly. The velocity forces theslipup, the tapered slip mandrel (body) setting them against the tubing wall, atthe same instance the ratchets in the slip carrier move over the serrated teethon the body and lock in place at the point where the slips are fully engaged in
the tubing wall.
Jar down to ensure the slips and ratchets are securely set, this will also shearthe jar down pulling tool setting the stop.Pulling the slip type tubing stop is done by attaching a pulling tool to the toolstring and lowering it to stop depth and latching the stop.Once the stop is latched, jarring upward will unseat the stop, and shear theratchets for removal from the wellbore.
Slip type tubing stops require velocity for setting, making precise setting depthsdifficult to achieve.Extensions may be fitted to B Stop Slip Carriers for use with Baker styleblanking plugs.