Apparatus and method for sampling an earth formation through a c

Details Apparatus and method for sampling an earth formation through a c Apparatus and method for sampling an earth formation through a c

1996-02-20

1997-12-02

Bagnell, David J.

Wells

Processes

Sampling well fluid

7315226, 166 551, 166298, E21B 43112, E21B 4910

Patent

active

056925654

ABSTRACT:
An apparatus is disclosed for perforating, testing and resealing casing in an earth formation borehole. The apparatus is moveable through the casing. The apparatus can also be mounted on a wireline, on tubing or on both. A perforating device is mounted in the apparatus for producing a perforation in the casing. The perforating device contains a flexible drilling shaft that enables the drilling of perforations in the casing of lengths greater than the diameter of the borehole. The apparatus will usually contain components for hydraulic testing and sampling from the formation behind the casing. Also mounted in the apparatus is a device for plugging and resealing the perforation with a solid plug.

REFERENCES:
patent: 3456504 (1969-07-01), Bombardieri
patent: 4369654 (1983-01-01), Hallmark
patent: 4658916 (1987-04-01), Bond
patent: 5195588 (1993-03-01), Dave
patent: 5413184 (1995-05-01), Landers

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