Plunger with multiple jackets

Details Plunger with multiple jackets Plunger with multiple jackets

2006-08-22

2006-08-22

Walker, Zakiya (Department: 3672)

Wells

With eduction pump or plunger

With packer or plug

C166S101000, C166S105000, C166S242600

Reexamination Certificate

active

07093652

ABSTRACT:
A plunger for use in tubulars in wells which produce fluids and/or gases under variable pressure. The plunger has at least two separate jackets comprised of segments mounted about one body or bodies joined by a connector, which collectively have increased sealing, holding, and lifting capabilities. A inner turbulent or labyrinth-type seal is accomplished by circumferential grooves on the core and/or fingers which project inwardly from the underside of the segments. The plunger body may also have an internal passage to facilitate more rapid descent, and a simplified stopper housed inside a chamber which is actuated when the plunger reaches a well stop or well bottom and which is held in a closed position by the build up of pressure below the plunger. When the pressure inside the tubulars above the plunger is reduced, the plunger and fluids move upwardly to the surface.

REFERENCES:
patent: 3424066 (1969-01-01), Moore
patent: 3424093 (1969-01-01), Moore, Jr.
patent: 3953155 (1976-04-01), Roeder
patent: 4239458 (1980-12-01), Yeatts
patent: 4410300 (1983-10-01), Yerian
patent: 4531891 (1985-07-01), Coles, III et al.
patent: 4898235 (1990-02-01), Enright
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patent: 6045335 (2000-04-01), Dinning
patent: 6176309 (2001-01-01), Bender
patent: 6200103 (2001-03-01), Bender
patent: 6209637 (2001-04-01), Wells
patent: 6554580 (2003-04-01), Mayfield et al.
Petrovalve USA; Petrovalve Plus Rod Pump Valve Brochure; no date; pp. 1-4.

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