CATASTROPHIC HIT INDICATOR FOR CATCHER IN PLUNGER GAS/FLUID LIFT SYSTEM FOR WELL OPERATIONS

摘要

A catastrophic or heavy-hit indicator subassembly is included in a plunger lift system lubricator which includes a coil spring above a striker block, a piston above the striker block, the piston sealed but moveable within the bore of the subassembly, above the piston another spring or set of spring washers, a space, and above the space a thin membrane or wall in a top nut or seal at the top of the lubricator. If the plunger reaches the lubricator with sufficient force, it will compress the coil spring and move the striker block to push the piston upward within the bore of the lubricator, the piston will compress the second spring or set of spring washers, and the top end of the piston, which is preferably pointed, will pierce the membrane or wall in the top of the lubricator.

主权项

1. A lubricator subassembly for a plunger gas lift system for a well, the subassembly comprising:
a. a striker block b. a coil spring resting on the upper end of the striker block c. a housing resting within the upper end of the coil spring d. a piston extending in a cylinder deposed through the housing e. the piston with a feature midway its length upon which a spring assembly sits f. an indicator cap above the housing capable of being pierced by the piston's upper end g. the subassembly being sealed within a chamber in the upper end of the lubricator h. the lubricator with a viewing port or window through which an observer can observe whether the indicator cap has been pierced.