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US 2022/0025742 A1Published application
Continuous circulation and rotation for liner deployment to prevent stuck
AssigneeSaudi Arabian Oil Company
InventorsAhmed A. Al-Mousa, Qadir Looni
Life of this patent
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Abstract
A system for drilling a well includes a gripping unit provided at a rig above a surface of the well for holding a top end of a drill string in the well, a liner releasably connected to the drill string, and a downhole motor installed on the drill string in an axial position between the surface of the well and the liner, where the downhole motor has a stator connected to the drill string and a rotor operatively connected to an axial end of the liner closest to the surface of the well.
Claims20
A system for drilling a well, comprising:
- a gripping unit provided at a rig above a surface of the well for holding a top end of a drill string in the well;
- a liner releasably connected to the drill string;
- and
- a downhole motor installed on the drill string in an axial position between the surface of the well and the liner, the downhole motor comprising:
- a stator connected to the drill string;
- and
- a rotor rotatably retained within the stator and operatively connected to an axial end of the liner closest to the surface of the well.
4 more elements
A method, comprising:
- tripping a drill string into a well, the drill string comprising:
- a downhole motor connected at a lower end of the drill string;
- and
- a liner connected to the downhole motor, such that the liner is operatively connected to the drill string through the downhole motor;
- connecting a drill pipe stand at an upper end of the drill string;
- rotating the liner relative to the drill string using the downhole motor during the connecting;
- and
- continuously pumping a fluid through the drill string during the connecting.
5 more elements
A system, comprising:
- a drill string comprising a plurality of connected-together drill pipe and at least one continuous circulation sub;
- a liner disposed at a lower end of the drill string;
- a downhole motor operatively connecting the liner to the drill string;
- and
- continuous circulation piping fluidly connected to a fluid source and at least one pump.
2 more elements
Dependencies are inferred from the claim text.