Gas-pressurized lubricator and method

Details Gas-pressurized lubricator and method Gas-pressurized lubricator and method

2004-11-24

2008-03-04

Bagnell, David (Department: 3672)

Wells

Processes

Placing or shifting well part

C166S068000, C166S105000

Reexamination Certificate

active

07337854

ABSTRACT:
Embodiments of the present invention provide methods and apparatus for reducing kinetic energy of a plunger within a plunger lift system. In one aspect, a lubricator is provided at a surface of a wellbore, the lubricator having a sealed, pressurized chamber therein to cushion the plunger upon impact. In another aspect, a method is provided for reducing the kinetic energy of the plunger by providing a compressed gas chamber within a lubricator, moving a kinetic energy-reducing surface which is partially bounding the chamber, and compressing the gas within the chamber to reduce kinetic energy of the plunger and cushion the impact force of the plunger.

REFERENCES:
patent: 1784110 (1930-12-01), Ricker
patent: 1790450 (1931-01-01), Torrance
patent: 1836876 (1931-12-01), Ricker
patent: 3351021 (1967-11-01), Moore, Jr.
patent: 1171550 (1969-11-01), None
GB Search Report, Application No. GB0523761.5, dated Mar. 24, 2006.
Bolling Abercrombie, Plunger Lift, The Technology of Artificial Lift Methods, Chapter 7, pp. 483-508, vol. 2b.
Plunger Lift, Production Control Services Inc., www.pcsplungerlift.com, © 1998, Fort Lupton, Colorado.
E. Beauregard, et al., Introduction to Plunger Lift: Applications, Advantages and Limitations, Apr. 23-24, 1981, Lubbock , Texas.

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