A GRAPHICAL METHOD FOR DESIGNING THE TRAJECTORY OF A WELL BORE

摘要

The present invention provides a graphical method to design and modify t he trajectory of a well bore. A well bore trajectory plan is comprised of hold and curve sections. Hold sections are generally described by specifying the attitude o f the hold and the length of the hold. Curve sections can be described and represented in a variety of ways. The present invention introduces control points that are formed at the intersection of extensions/projections of the two hold sections contacting a curve sectio n. The hold sections contact the curve section at tangent points. The tangent points for a curve section have the same distance to the control point. In operation, as a control point is moved, the direction and inclination of multiple sections of the well plan a re simultaneously modified. These simultaneous modifications enable the user to quickly and intuitively modify a well plan.