E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/25, 166/51.4
E21B 7/12 (2006.01)
Patent
CA 1054932
ABSTRACT OF THE DISCLOSURE An improved method and apparatus used for offshore drilling operations is disclosed which is particularly useful in those operations where a floating vessel or drilling platform is situated at the surface of a body of water with a riser assembly extending between the platform and the well and a blowout preventer assembly is positioned therebetween near the lower end of the riser assembly. In the practice of this invention at least one fluid bypass conduit provides a path for high pressure fluid to flow from the well at a point below at least one of the blowout preventers to the riser assembly at a point below the surface of the water and above the blowout preventer assembly. A means in each bypass conduit controls the flow of fluid through the conduit to regulate the fluid pressure in the well when the blowout preventers are in the closed position. -1-
273695
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