Plunger for gas wells

Details Plunger for gas wells Plunger for gas wells

2006-10-17

2006-10-17

Bagnell, David (Department: 3672)

Wells

With eduction pump or plunger

C166S053000

Reexamination Certificate

active

07121335

ABSTRACT:
A plunger for a gas well including an elongate body having a first end and a second end. A sleeve overlying the body. The sleeve being shorter in length than the elongate body and is axially moveable between the first end and the second end of the body. At least one circumferential seal on the exterior surface of the sleeve, thereby providing a barrier to the passage of fluids along the exterior surface of the sleeve. At least one fluid flow passage is provided through the sleeve. A first axial stop is provided at the first end of the body and a second axial stop is provided at the second end of the body to limit axial movement of the sleeve. The second axial stop having sealing shoulders which engage the second end of the sleeve to close off the at least one fluid flow passage.

REFERENCES:
patent: 2661024 (1953-12-01), Knox
patent: 3055306 (1962-09-01), Tausch
patent: 3181470 (1965-05-01), Clingman
patent: 4239458 (1980-12-01), Yeatts
patent: 4502843 (1985-03-01), Martin
patent: 4629004 (1986-12-01), Griffin
patent: 6148923 (2000-11-01), Casey
patent: 6200103 (2001-03-01), Bender
patent: 6644399 (2003-11-01), Abbott et al.
patent: 6725916 (2004-04-01), Gray et al.

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