Method and apparatus for reducing plunger seal wear on automatic casing swab lift systems
AssigneeConocoPhillips Company
InventorsRonald C. Bishop, David P. Gregg
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Abstract
An apparatus is disclosed for improving plunger seal life on a casing swab system. The apparatus includes a diameter adapter disposed between an upper end of a wellbore casing and a lubricator adapted to receive a plunger therein. The diameter adapter is configured to provide a substantially constant internal diameter between the lubricator and the upper end of the casing. A method is also disclosed which includes retaining a casing swab plunger in a lubricator adapted to receive it for at least an amount of time sufficient to enable entrapped gas and fluids substantially to escape from the plunger seal material.
Claims17
An apparatus for improving plunger seal life on a casing swab system, comprising:
- a diameter adapter disposed between an upper end of a wellbore casing and a lubricator adapted to receive a plunger therein, the adapter configured to provide a substantially constant internal diameter between the lubricator and the upper end of the casing.
A method for improving plunger seal life in an automatic casing swab system, comprising:
- allowing a plunger to lift into a lubricator adapted to receive the plunger therein;
- and retaining the plunger in the lubricator for at least a time dependent on wellhead pressure to enable entrapped gas and fluids substantially to escape from a plunger seal material.
A method for improving plunger seal life on a casing swab system, comprising:
- inserting into a wellhead disposed at an upper end of a wellbore casing a diameter adapter, the adapter disposed between the upper end of the wellbore casing and a lubricator adapted to receive a plunger therein, the adapter configured to provide a substantially constant internal diameter between the lubricator and the upper end of the casing.
Dependencies are inferred from the claim text.