Gas lift plunger arrangement

Details Gas lift plunger arrangement Gas lift plunger arrangement

2008-07-08

2008-07-08

Bates, Zakiya W (Department: 3676)

Wells

Processes

Cleaning or unloading well

C166S068000, C166S105000, C166S112000, C166S177300

Reexamination Certificate

active

07395865

ABSTRACT:
A plunger in a plunger lift system in an oil and gas well includes shaped grooves spaced along the plunger body, angled fins or below the grooves, an elongated interior cavity open at the bottom, and passages connecting the interior cavity to the grooves. The shape, sizing and spacing of the grooves improves plunger seal and decreases liquid loss during plunger lift. The flutes or fins spin the plunger to clean the tubing string and prevent the plunger from becoming stuck in the lubricator. The interior cavity lightens the plunger and, in combination with the passages, improves the seal created by the shaped grooves. A method of controlling fluid flow in a tubing string in the plunger lift system includes the elongated plunger controllably traveling vertically therethrough, including the steps of: arranging an array of side holes through a side wall of the elongated plunger, wherein the side holes create turbulence in gas within the tubing string; and rotating the elongated plunger about a longitudinal axis thereof, as the plunger travels through the tubing string in the plunger lift system.

REFERENCES:
patent: 4410300 (1983-10-01), Yerian
patent: 6725916 (2004-04-01), Gray et al.

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