Patent Number: 6,637,515

Title: Method and apparatus for reducing plunger seal wear on automatic casing swab lift systems

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.

Inventors: Bishop; Ronald C. (Flora Vista, NM), Gregg; David P. (New Philadelphia, OH)

Assignee: ConocoPhillips Company

International Classification: E21B 43/12 (20060101); E21B 043/00 ()

Expiration Date: 10/28/2020