Sealing element for pipes and methods for using

Details Sealing element for pipes and methods for using Sealing element for pipes and methods for using

2007-09-25

2007-09-25

Mai, Lanna (Department: 3637)

Wells

Processes

Placing or shifting well part

C166S135000, C166S192000, C166S196000, C166S217000

Reexamination Certificate

active

10499066

ABSTRACT:
A sealing device for shutting down a pipe, comprising an expandable cylindrical sleeve (1), which is designed with a conical interior, and is provided with radially through-going slots (3) extending in the sleeve's longitudinal direction from each of the sleeve's end surfaces (4,5), with slots from opposite end surfaces being arranged between one another. A rod (2) extends through the sleeve (1), where the rod (2) is provided with a conical portion with an outside adapted to the sleeve's conical inside, and where the rod's conical portion has a smallest diameter smaller than or equal to the sleeve's smallest inner diameter in its non-expanded form and a largest diameter equal to or larger than the sleeve's largest inner diameter in its expanded form. When inserting the sealing device, the rod (2) is passed in the sleeve's (1) longitudinal direction, thus causing the rod's conical portion to come into contact with and be pressed against the sleeve's inner surface, with the result that the sleeve is expanded and comes into contact with the pipe wall.

REFERENCES:
patent: 1092540 (1914-04-01), Robinson
patent: 2006105 (1935-06-01), Maguire et al.
patent: 2247325 (1941-06-01), Wagner
patent: 4796707 (1989-01-01), Halbardier
patent: 5226492 (1993-07-01), Solaeche
patent: 6513600 (2003-02-01), Ross
patent: 6827150 (2004-12-01), Luke
patent: 0215541 (1987-03-01), None
patent: 229520 (1996-07-01), None
patent: 2308138 (1997-06-01), None
patent: 2357536 (2001-06-01), None

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