Installed inside the tubing string in tubing that is "collared". Must be set with wireline. Collar lock is set in the collar gap between the ends of two pieces of tubing.
One-piece construction permits ease of installation and retrieval. Collar lock, fishing neck and bumper spring are all included in this unit.
Installed via wireline. Can be set in a single trip and retrieved in a single trip. Permanently attached, the spring cannot travel up behind the plunger.
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