Continuous composite coiled tubing with embedded electric conductors can provide uninterrupted flow of data from downhole tools. This capability makes monitoring borehole stability throughout the entire drilling process possible, even when conventional mud-pulse telemetry tools are not operating and cannot provide information in real-time. An operator faces many borehole stability problems: stuck pipe, pack-off events, lost circulation, kicks, leak-off tests, and formation integrity tests, all of which can result in periods. of non-circulation. However, an operator no longer has to rely solely on surface gauges to provide downhole information to deal with these problems because downhole readings are now available. The benefits of downhole pressure and tension data throughout these problematic and routine activities provide valuable information on events during the most critical operating procedures. Consequently,- corrective actions can be taken to prevent or cure borehole stability problems almost as soon as they develop. In addition, downhole data can help reduce drilling time. The borehole is under constant scrutiny. Drilling, tripping, non-circulating, and circulating operations can be, optimized while avoiding other potential problems. For example: Swab and surge pressures can be monitored constantly while tripping without circulating; Ledges and tight spots can be identified before they cause severe damage; Time for leak-off tests (LOT) and formation integrity tests (FIT) can be minimized; Early indications of borehole ballooning can be identified before ballooning becomes, a major borehole stability issue; and, Hole cleaning intervals can be optimized, reducing drilling time. This paper covers a series of examples where continuous, uninterrupted data transmission was used to anticipate and prevent borehole stability problems and optimize the drilling procedure.