Research On The Stereographic Projection In Geology Engineering Drilling And Its Application

In geology engineering investigation, encountered in the target layer buried deeper or site restricted of investigation works, where the subject needs to use directional drilling technology; and it still needs to use directional drilling technology to define the unexposed rock of the occurrence of the structure plane. Directional drilling Trajectory design and Core-orientation technology exist a large number of calculations, in particular, the calculation of the oriental angle. The process of calculation is rather cumbersome and complex. The paper studies the use of Stereographic projection into the process of simplifying the calculation, and it achieved some results.In this paper, Stereographic projection in the controlled directional drilling technology is concluded by investigation and study, laboratory testing, field experiments, theoretical analysis, process improvement, engineering and other research methods, including the use of the three-dimensional Profile Design ; analyzed and studied that how to define the occurrence of structure plane by the Core-orientation technology through the Stereographic projection.Through analysis of Stereographic projection of the basic principles of face, the red-line projection method, Stereographic projection methods are applied to the directional drilling axis design calculations, having a range of parameters formula. By the application of Stereographic projection, relationships of angles of deviating are been derived. Three-dimensional orientation in space-branch in the design, through the use of red-projection method, three-dimensional space-oriented branches to the equatorial plane projection axis, thus plane into the issue, re-use of the spherical triangle formula, to be Directional Drilling characteristics of the various parameters. And on this basis, the use of development tools PowerBuilder cored Directional drilling Trajectory axes design applications.In this paper, through analysis and study Stereographic projection method in the application of Core-orientation technology, and introduction of Stereographic projection method in the application of how to define the occurrence of the structral plane by indentation Core-orientation and unindentation Core-orientation, and discussion of Stereographic projection in the use of Chart law and numeration.The paper with engineering examples demonstrated that it is feasible by the use of Stereographic projection technology in the controlled directional drilling technology. Not only simplify the difficulty of the calculation of the oriental angle, but also make diagrammatize more intuitive, and still add the accuracy of the caculation.