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US 9,528,322 B2Granted
Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations
AssigneeShell Oil Company
InventorDuncan Charles MacDonald
Life of this patent
Estimating the term…
Abstract
A method for forming a subsurface wellbore is disclosed. The method includes operating a drilling string in a first direction of rotation. A first motor located near the end of the drilling string is operated in a direction of rotation opposite that of the drilling string. A drill bit is rotated using a second motor that is coupled to the first motor.
Claims9
A system for forming a subsurface wellbore, comprising:
- a drilling string configured to rotate in a first direction of rotation;
- a bottom hole assembly coupled to the drilling string;
- a drill bit coupled to an end of the bottom hole assembly, the drill bit being configured to rotate in the first direction of rotation to form the wellbore;
- and
- a first motor and a second motor located on the bottom hole assembly, wherein the first motor is configured to rotate the drill bit in the first direction of rotation, and wherein the second motor is configured to rotate at least a portion of the bottom hole assembly in a second direction of rotation, the second direction of rotation being opposite the first direction of rotation.
2 more elements
The system of 4, wherein the second motor comprises a motor shaft coupled to the rotor, and wherein the motor shaft faces up-hole.
Dependencies are inferred from the claim text.