Apparatus and methods for drilling a wellbore using casing

An drilling assembly for directing a path of a wellbore, comprising:

• an outer casing having a deflecting member for deflecting a direction of the drilling assembly;
• an inner casing having a motor system disposed therein, the inner casing disposed within the outer casing and operatively attached thereto;
• and
• an earth removal member operatively connected to a lower end of the outer casing, wherein the earth removal member is rotatable by the motor system.

A method of initiating and continuing a path of a wellbore, comprising:

• providing a first casing having a first earth removal member operatively disposed at a lower end thereof;
• penetrating a formation with the first casing to form the wellbore;
• selectively altering a trajectory of the wellbore while penetrating the formation with the first casing;
• flowing drilling fluid to a motor system disposed in a second casing, the second casing being releasably attached to an inner diameter of the first casing and having a second earth removal member;
• and
• rotating the second earth removal member with the motor system.

A method of altering a path of a casing into a formation, comprising:

• providing an outer casing with a deflector releasably attached to its lower end;
• penetrating the formation with the deflector;
• releasing the deflector from the outer casing;
• and
• deflecting the path of the outer casing in the formation by moving the casing string along the deflector.