E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/50
E21B 33/06 (2006.01) E21B 21/00 (2006.01) E21B 21/10 (2006.01) E21B 33/064 (2006.01)
Patent
CA 1216515
ABSTRACT A system and method for installing a fluid flow controller and telescoping spools beneath an off- shore bottom supported drilling rig rotary table is dis- closed. Upper and lower telescoping spools are pro- vided for initially connecting a Diverter/BOP con- vertible fluid flow controller between structural casing in the well and a permanent housing beneath the drilling rig rotary table. Clamp means are provided for clamp- ing the rig vent line to an opening in the housing wall of the fluid flow controller during drilling of the borehole through the structural casing in preparation for setting and cementing the conductor casing. In that mode, the system is adapted as a diverter system. After the well is drilled for the conductor casing and the conductor casing is cemented and cut off at its top, a mandrel is fitted at the top of the conductor casing to which the lower end of the lower spool may be connected. The system may be used in this configuration as a diverter system, or after removal of the vent line and connection of a kill line to the housing outlet, the system may be used as a low pres- sure blowout preventer system. An alternative embodiment of the invention is disclosed which provides a telescoping spool diverter/ BOP convertible fluid flow controller and structural casing in the well. The top of the controller is connected to the permanent housing beneath the drilling rig rotary table. Additionally, a diverter system, a low pressure blowout preventer system and a high pressure blowout preventer system is disclosed where the system and method provides the controller connected directly to the permanent housing. This abstract of the disclosure is neither intended to define the scope of the invention, which is measured by the claims, nor is it intended to limit the invention in any way.
468906
Alexander Gabriel G.
Carbaugh William L.
Roche Joseph R.
Hydril Company
Smart & Biggar
LandOfFree
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