Wiper seal assembly for blowout preventer

Details Wiper seal assembly for blowout preventer Wiper seal assembly for blowout preventer

E - Fixed Constructions

21

B

E21B 33/06 (2006.01) E21B 33/08 (2006.01)

Patent

CA 2634439

A hydraulically-operated annular blowout preventer, for controlling a wellbore and comprising a wiper seal assembly, is described. The wiper seal assembly comprises a discrete wiper seal, for preventing debris and/or contaminants from the wellbore from entering the hydraulic fluid chamber of the blowout preventer, a discrete pressure seal, positioned below and abutting the wiper seal in the same seal groove, for isolating the hydraulic chamber, and a retainer member for preventing both radial and axial movement of the wiper seal.

La présente invention décrit un bloc obturateur annulaire hydraulique servant à réguler un puits de forage et comprenant un joint racleur. Le joint racleur se compose d'un joint discret qui empêche les débris et (ou) les contaminants du puits de forage d'entrer dans la chambre de liquide hydraulique du bloc obturateur, d'un joint de pression discret disposé en dessous et affleurant le joint racleur dans la même rainure d'étanchéité et servant à isoler la chambre de liquide hydraulique, et d'un élément de retenue qui empêche tout mouvement radial et axial du joint racleur.

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