A rotary steerable system including a steering section having at least one piston, at least one distribution flow passage extending from a valve to one of the pistons, and two main flow passages bypassing the pistons. At least a portion of each main flow passage is closer to a central point of the steering section than an outer boundary of the distribution flow passage. At least a portion of each main flow passage may also be closer to the central point of the steering section than an inner boundary of the pistons in a retracted position. The distribution flow passages are contained within a central area, with a ratio of a central area diameter to steering section diameter being 0.5 or less, preferably 0.4 or less. The steering section may include two piston sets and two distribution flow passages each extending from the valve to a piston.
Rotary steerable system with central distribution passages
2023-10-18
Patent
Electronic Resource
English
Drilling with rotary steerable system reduces wellbore tortuosity
Tema Archive | 2001
|Rotary-steerable system drills 300000 ft of hole
Tema Archive | 1999
|Rotary-steerable technology lowers drilling time, well costs
Tema Archive | 2002
|