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.
Claims30
A method for forming a subsurface wellbore, comprising:
- operating a drilling string in a first direction of rotation;
- operating a first motor located near the end of the drilling string to rotate a bottom hole assembly in a direction of rotation opposite the direction of rotation of the drilling string;
- and
- rotating a drill bit using a second motor that is coupled to the first motor.
A system for forming a subsurface wellbore, comprising:
- a drilling string configured to rotate in a first direction;
- a bottom hole assembly comprising a drill bit, the drill bit being configured to form the wellbore;
- a first motor located near the end of the drilling string, the first motor being configured to rotate a portion of the bottom hole assembly in a direction opposite to that of the drilling string;
- and
- a second motor configured to rotate the drill bit.
A system for forming a subsurface wellbore, comprising:
- a drilling string;
- a first motor located near the end of the drilling string configured to rotate in a direction of rotation opposite that of the drilling string;
- a drill bit on an end of the drilling string, the drill bit being configured to form the wellbore;
- a second motor configured to rotate the drill bit;
- and
- a non-rotating sensor located on the drilling string.
A method for forming a subsurface wellbore, comprising:
- operating a drilling string in a first direction of rotation;
- operating a first motor located near the end of the drilling string in a direction of rotation opposite that of the drilling string;
- rotating a drill bit using a second motor that is coupled to the first motor;
- and
- using at least one spatial offset or angular offset to determine a steering solution to move the trajectory of the drilling string back into convergence with a desired drilling geometry.
A method for forming a subsurface wellbore, comprising:
- operating a drilling string in a first direction of rotation;
- operating a first motor located near the end of the drilling string in a direction of rotation opposite that of the drilling string;
- rotating a drill bit using a second motor that is coupled to the first motor;
- determining a differential pressure for a bottom hole assembly at a neutral drilling speed;
- measuring a differential pressure for the bottom hole assembly during operation;
- and
- using the measured differential pressure to control a speed of the drilling string relative to a neutral drilling speed.
A system for forming a subsurface wellbore, comprising:
- a drilling string configured to rotate in a first direction;
- a bottom hole assembly comprising a drill bit, the drill bit being configured to form the wellbore;
- a first motor located near the end of the drilling string, the first motor being configured to rotate a portion of the bottom hole assembly in a direction opposite to that of the drilling string, wherein the first motor is installed in an inverted orientation.
Dependencies are inferred from the claim text.