Wells – Expansible anchor or casing – Expansible casing
Reexamination Certificate
2007-04-17
2007-04-17
Bagnell, David (Department: 3672)
Wells
Expansible anchor or casing
Expansible casing
C166S206000, C166S382000, C166S384000
Reexamination Certificate
active
11324165
ABSTRACT:
A device for expansion and calibration of profile pipes, such as profile liners, with cylindrical threaded ends in their installation in a well. The device has a plurality of in-series connected mandrel assemblies, each of which has a housing with a central straight-through channel and inclined slots, in which rains are fastened and hinge-connected through pushers, tightened with respect to the housing, with a spring-loaded rod, accommodated in the central straight-through channel of the housing. Rods of an upper mandrel assembly are spring-loaded for holding the rams in nonoperating position, and rods of a lower assembly are spring-loaded for holding the rams in operating position. The lower mandrel assembly is provided with a choke. The Maximum diameter of a circle circumscribed about each mandrel assembly in its working position decreases from the upper assembly to the lower one.
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patent: 5014779 (1991-05-01), Meling et al.
patent: 6457532 (2002-10-01), Simpson
patent: 2005/0022986 (2005-02-01), Ring et al.
patent: 2382605 (2003-06-01), None
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patent: 1747673 (1992-07-01), None
Partial English translation of RU 215148C2.
Partial English translation of RU 2194841C2.
Partial English translation of SU 1432190 A1.
Partial English translation of SU 607950 A.
Partial English translation of SU 1747673 A1.
Abdrakhmanov Gabdrashit Sultanovich
Abdrakhmanov Ruslan Gabdrashitovich
Ibatullin Ravil Rustamovich
Junyshev Leonid Vladimirovich
Jusupov Izil Galimzyanovich
Bagnell David
Collins G M
Ladas and Parry LLP
Otkrytoe Aktsionernoe Obschestvo “Tatneft” IM. V.D
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