Apparatus and method for repairing a gravel-packed well completion

U.S. Patent Number: 5287928

Abstract: An apparatus for repairing a well completion having a gravel-packed annulus formed by a liner and a well casing, the annulus having at least one region within the gravel pack which is devoid of gravel. The apparatus includes a tubular detonator sub pipe for placing an explosive device within, the sub pipe having a first end and a second end, the first end having a connector for connecting the sub pipe to a work string adapted to convey an electrical line; at least one elongated rigid member having a first end and a second end, the rigid member having a longitudinally disposed hole for placing an explosive primer cord therethrough, the rigid member having a plurality of vent orifices in fluid communication with the longitudinally disposed hole; and a pinned hinge for pivotally connecting the first end of the rigid member to the second end of the tubular detonator sub pipe; whereby detonation of the explosive device detonates the primer cord effecting pivotal movement of the at least one elongated rigid member so as to cause the apparatus to impact the liner wall of the gravel-packed well completion.

Inventors: Healy; John C. (Metairie, LA), Sukup; Richard A. (Burleson, TX)

Assignee: Mobil Oil Corporation (Fairfax, VA)

Application Number: 07/976,023

Issued: 1994-02-22

Expired: 2006-02-22

Classes: 166/278 ; 166/297

Field of search: 166/278,297-299,55-55.1

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