In an ideal borehole and mud system, cuttings would be transported to surface with the same order and composition as they were cut, as in Figure 1. In reality, it is commonly observed that, no matter how sharp a drilling break or clearly defined a formation top on an electric log, the formation top as logged from cuttings will appear to be “transitional.” (Note: not transitional in the sense that the cuttings show a varying composition, but that cuttings of a new type appear in increasing abundance as more hole is made.)Continue reading “Drilling Cuttings RECOVERY”
A mud log is a chemical and visual analysis of the drilling mud and well cuttings for traces of subsurface natural gas and crude oil as the well is being drilled.Continue reading “What Is Mud LOGGING”
Cuttings injection system is used to inject particles into the mud system before test section stream flow. Two control valves as shown in Figure 1 were used to separate the injection system from main flow line.
Directional Boring, often undifferentiated from Horizontal Directional Drilling (HDD), is a minimal impact trenchless method of installing underground pipe, conduit, or cables in a relatively shallow arc or radius along a prescribed underground bore path by using a surface-launched drilling rig. – wiki