Flow diverter

Details Flow diverter Flow diverter

E - Fixed Constructions

21

B

166/41

E21B 43/12 (2006.01) E21B 21/00 (2006.01) E21B 21/08 (2006.01) E21B 21/10 (2006.01) E21B 33/064 (2006.01)

Patent

CA 1191781

FLOW DIVERTER ABSTRACT Apparatus adapted for connection to a drilling conduit beneath a drilling rig floor for diverting pressurized well bore fluid in the conduit from the rig and sealing the annulus between a pipe or other object and the conduit or closing the conduit in the absence of any object in the vertical flow path in the conduit is disclosed. The apparatus includes a housing, an annular packing element and an annular piston disposed therein. The piston when actuated serves the dual functions of closing the packing element about an object in the bore and opening a vent line connected to an outlet passage provided in the wall of the housing. In another embodiment of the invention, two outlet passages in the housing are provided one connected to the vent line, the other to the rig drilling fluid system. The piston is also provided with at least one hole such that when not actuated, the piston covers the vent line yet the piston hole aligns with the outlet passage to the fluid system. When actuated, the piston not only closes the annular packing element, but prior to closing the vertical flow of the well bore, also opens the passage to the vent line and closes the passage to the rig fluid system.

443158

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