Pipeline isolation

Details Pipeline isolation Pipeline isolation

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 55/134 (2006.01) F16L 55/11 (2006.01) F16L 55/128 (2006.01)

Patent

CA 2706810

A pipeline isolation plug (10) for location in a section of pipe (12) has two seal modules (14,16) coupled together by a ball joint (18). The first module (14) has a mandrel (20) defining a pressure head (22) which, in use, is exposed to the pipeline pressure (P1). A seal element (24) is mounted behind the pressure head (22) and is radially extendable to engage a pipe inner wall (26). The second module (16) has a mandrel (36) defining a pressure head (38) which, in use, is exposed to the fluid pressure (P2) between the first and second modules (14,16). Two axially spaced seal elements (40, 42) are mounted on the mandrel (36) behind the pressure head (38) and are radially extendable to engage the pipe inner wall (26).

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