تعاریف کلیدی حفاری کج
The angle of the well bore direction as projected to a horizontal plane and relative to due north. By industry convention, 0 degree azimuth coincides with North, 90 degree azimuth with East, 180 degree azimuth with South, and 270 degree azimuth with West.
The difference in azimuth between actual and planned well paths, typically at a specific measured depth.
A summary of geometric information; calculated with directional survey data and a directional survey calculational method (e.g., minimum curvature method); that pertains to spatial properties (e.g., Cartesian coordinates) of a directional well; sometimes synonymous with directional survey data or directional survey station.
Directional Survey Data:
Typically refers to the "raw" data acquired at a directional survey station, namely, well bore inclination and azimuth at specific measured depths.
Directional Survey Station:
A reference point that corresponds to a measured depth along the (typically actual) well path where well bore inclination and azimuth are observed/measured and recorded.
The angle of the well bore defined by a tangent line and a vertical line. The vertical line is always parallel to the direction of earth's gravity. By industry standard, 0 degree inclination is vertical (downward pointing) and 90 degrees inclination is horizontal. An inclination (angle) greater than 90 degrees coincides with the term "drilling up".
The difference in inclination between actual and planned well paths, typically at a specific measured depth.
Drilling directionally with the intent to increase well bore inclination; also refers to increasing and orienting lateral bit force magnitude to or towards the high side of the drill hole.
Drilling directionally with the intent to change (increase or decrease) well bore azimuth.
Trajectory: Same as well path, either actual or planned; the traverse that defines the actual or preferred existence of a well bore via spatial properties.