Abstract: An apparatus for combined coring and drilling in a wellbore that includes a core drilling assembly with a coring drill head, an outer tubing for conveying forces to the drill head, an inner tubing with a lower end adapted for receiving a core sample. The apparatus further includes: a lifting device; closure elements with embedded cutting implements for cutting the core sample; and one or more controller device(s) for controlling activation and deactivation of the closure elements. The closure elements are connected to the core drilling assembly below an opening of the inner tubing such that, when in an open position the core sample can enter the inner tubing, and when in a closed position core material is cut and the cut core material is prevented from entering the inner tubing and exits to the borehole annulus via drill head openings provided in the wall of the coring drill head.

Abstract: An apparatus for combined coring and drilling in a wellbore includes a core drilling assembly with a coring drill head, an outer tubing for conveying forces to the drill head, an inner tubing with an upper end connected to a bearing assembly, and a lower end adapted for receiving a core sample. The apparatus further includes: a lifting device, for controlling the position of the inner tubing along the longitudinal axis of the core drilling assembly, that is connected to or is arranged as a part of the bearing assembly; closure elements with embedded cutting implements for cutting core sample; and one or more controller device(s) for controlling activation and deactivation of the closure elements.

Abstract: A core drilling apparatus and a method for converting between a core drilling assembly and a full-diameter drilling assembly by means of a lifting device and a coring drill head with closure elements and integrated cutting implements. The lifting device comprises a release mechanism that when activated, releases forces acting on the lifting device, such that when the lifting device is in an upper position when activated, the lifting device lowers an inner tubing thereby pushing the closure elements of the drill head in an open position, and when the lifting device is in a lower position when activated, the lifting device lifts the inner tubing from the closure elements such that the closure elements is in a closed or partly closed position.

Abstract: A technology is described of a system capable of altering between extracting a core sample from, or drilling of, a downhole subterrain formation. In coring mode the core is encapsulated downhole at in-situ conditions with a material capable of providing a pressure tight seal around the core, protecting the core and temporary storing the core downhole in an inner string for later retrieval. In drilling mode the unwanted sections of the core is grinded away and the material discarded. No tripping to surface is required to change the composition of the drillstring to alter between drilling mode and coring mode. Downhole sensor technology and intelligence is used to distinguish between areas of interest where the core is encapsulated and kept, and areas of no interest where the core is discarded.