Graphical method for designing the trajectory of a well bore

A computer program product in a computer readable medium for graphically planning the direction and inclination of a well bore trajectory using graphical techniques comprising:

• instructions for generating an initial starting point and ending point for a well bore trajectory, the well trajectory having hold and curve sections;
• instructions for creating a control point for each desired curve section between the starting point and ending point, said control points being at locations off said curve section;
• instructions for identifying tangent points along the well bore trajectory where hold sections contact a curve section of the trajectory;
• instructions for determining any directional constraints on the ability to manipulate the control point;
• and
• instructions for graphically manipulating multiple sections of the well bore trajectory simultaneously by directional movement of points related to the well bore trajectory within said determined directional constraints.

A graphical well bore trajectory display capable of real-time graphical manipulation comprising:

• an initial hold section at the starting point of the well bore trajectory;
• a curve section connected to said initial hold section;
• a second hold section connected to said curve section;
• and
• a control point positioned at a location of the well bore trajectory, to enable simultaneous manipulation of said hold and curve sections of the well bore.