Method of freeing stuck drill pipe

Details Method of freeing stuck drill pipe Method of freeing stuck drill pipe

2005-01-25

2005-01-25

Neuder, William (Department: 3672)

Wells

Processes

Vibrating the earth or material in or being placed in the...

C166S301000

Reexamination Certificate

active

06845818

ABSTRACT:
Disclosed is an auxiliary method for freeing a drill pipe stuck due to build up of filter cake, which provides a reduction in the amount of force required to free said pipe which comprises:a) Lowering an ultrasonic horn type device down the drill pipe to the point of contact between said drill pipe and mud filter cake;b) Producing ultrasonic energy at the point of contact until the contact area is sufficiently reduced such that substantially less force is required to free the pipe.

REFERENCES:
patent: 4384625 (1983-05-01), Roper et al.
patent: 4561500 (1985-12-01), Thompson et al.
patent: 4667742 (1987-05-01), Bodine
patent: 5597265 (1997-01-01), Gallo
patent: 6009948 (2000-01-01), Flanders et al.
patent: 20020104652 (2002-08-01), Cole et al.
patent: 2001-43528 (2001-02-01), None
patent: 0183933 (2001-08-01), None
patent: WO 03050383 (2003-06-01), None

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