Anti-rotation device for cementing plugs with deformable...

Details Anti-rotation device for cementing plugs with deformable... Anti-rotation device for cementing plugs with deformable...

E - Fixed Constructions

21

B

E21B 43/10 (2006.01) E21B 33/14 (2006.01) E21B 33/16 (2006.01)

Patent

CA 2045441

- Used for exploitation of oil or similar wells. - The device includes a tubular portion . designed to be interposed between the lowermost element of a casing (1) and the bottom holding sleeve (3), . made of a material with a strong friction coefficient, and easily drillable by a drilling tool, . delimiting, from its bottom opening (7a) on, an internal convergent (11) opening into a straight section (12) with a diameter substantially equal to or lower than that of the plugs (13, 14) in the prestressed state of the lips, and having, from said section on, a bore (15) with the same diameter as the latter, extending over an axial length at least equal to that occupied by at least two plugs in abutting contact. - Application for wells cementing.

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