Applications of Multi-Stage Radial Turbine Hydraulic Drive Casing Shoes in Offshore Oilfields
To solve the problem of difficult and inefficient casing running in highly deviated and hori-zontal wells,and to improve well quality and cementing efficiency,a multi-function and multi-stage radial turbine hydraulically driven casing shoe has been developed.The tool consists of three modules:the stator assembly,the rotor assembly and the bearing system.The stator and rotor work together through hydraulic drives and multi-stage radial turbines to increase drive torque.Together with a helical reinforcement embedded with alloy teeth on the outside,which increases wear resistance,he ability to repair and expand the borehole.The length of this tool is 1/3～1/5 of that of traditional turbine structure casing shoes,with a simple and reliable structure,compact size,strong ability to pass through dog legs,and output torque up to 5～10 times that of tradi-tional reaming tools.Several field case studies have shown that this tool can ensure safe casing in-stallation in complex wellbore sections and significantly reduce the number of reaming operations.
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