Leak containment system

Abstract

A system, comprising: an assembly provided at a surface of a well, the assembly comprising: a mud return passage fluidly connecting an annular flow path through the well to a mud return outlet; a mechanical barrier, comprising: a housing; and a body disposed in the housing, the body having a variable opening extending through an axial thickness of the body; and a tertiary wiper comprising: an elastomeric body; and a hole extending centrally through the elastomeric body; wherein the mechanical barrier and the tertiary wiper are in an axially stacked arrangement relative to each other; a volume control system, comprising: an assembly of connected valves and conduits fluidly connected to the mud return outlet; and a drill string extending through the assembly into the well, wherein the drill string extends through the variable opening of the mechanical barrier and the hole of the tertiary wiper. 20 26 23 39 69 15 S ep 2 02 6 2 0 2 6 2 3 3 9 6 9 1 5 S e p 2 0 2 6

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