Downhole vibratory tool

Details Downhole vibratory tool Downhole vibratory tool

2005-04-21

2009-08-18

Gay, Jennifer H (Department: 3676)

Wells

Vibrator

C166S098000, C166S319000

Reexamination Certificate

active

07575051

ABSTRACT:
A vibratory tool for downhole use is capable of letting a wireline or other tools pass a passage therethrough that can be subsequently closed by landing a plug on a seat. The dump valve is disposed annularly about the central passage so that cycling the tool does not cause it to be slammed against a seat. Since only a plug is delivered to a passage the functioning parts already in the housing are made stronger to improve reliability. Additional power is delivered per stroke from modular stacked piston units. The tool can be run in a manner where the high amplitude low frequency oscillating forces are delivered to the stuck fish without impacts of the pistons on the housing.

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