A system 10 and method 50 of enabling the acquisition of borehole survey data and core orientation data in a single instrument trip in a core drill 12 having a drill string 18 and an inner core barrel assembly 16. The method uses a borehole survey tool 14 that is arranged to at least log its position in three-dimensional space. The borehole survey tool 14 is run down the drill string 12 in which the inner core barrel assembly 16 is installed. The inner core barrel assembly 16 is arranged to either provide or facilitate detection of an indication of tool face of a core sample 24 held in the inner core barrel assembly 16. The indication of tool face is then transferred mechanically or electronically to the visiting borehole survey tool 14.

A system 10 and method 50 of enabling the acquisition of borehole survey data and core orientation data in a single instrument trip in a core drill 12 having a drill string 18 and an inner core barrel assembly 16. The method uses a borehole survey tool 14 that is arranged to at least log its position in three-dimensional space. The borehole survey tool 14 is run down the drill string 12 in which the inner core barrel assembly 16 is installed. The inner core barrel assembly 16 is arranged to either provide or facilitate detection of an indication of tool face of a core sample 24 held in the inner core barrel assembly 16. The indication of tool face is then transferred mechanically or electronically to the visiting borehole survey tool 14.

A directional core drilling includes an outer barrel assembly with at least one steering pad for orientating a drill bit within a hole and a drive barrel rotationally supported within the outer barrel assembly. An inner drive assembly is receivable within the outer barrel assembly and includes a torque latch assembly and an anti-rotation bearing assembly. The torque latch assembly includes latch arms configured to releasably couple a rotational drive input to the drive barrel. A core barrel is coupled to the anti-rotation bearing assembly and is rotationally fixed relative to the drive barrel.

A system (10) and method (50) of enabling the acquisition of borehole survey data and core orientation data in a single instrument trip in a core drill (12) having a drill string (18) and an inner core barrel assembly (16). The method uses a borehole survey tool 14 that is arranged to at least log its position in three-dimensional space. The borehole survey tool (14) is run down the drill string (12) in which the inner core barrel assembly (16) is installed. The inner core barrel assembly (16) is arranged to either provide or facilitate detection of an indication of tool face of a core sample (24) held in the inner core barrel assembly (16). The indication of tool face is then transferred mechanically or electronically to the visiting borehole survey tool (14).

A system (10) and method (50) of enabling the acquisition of borehole survey data and core orientation data in a single instrument trip in a core drill (12) having a drill string (18) and an inner core barrel assembly (16). The method uses a borehole survey tool 14 that is arranged to at least log its position in three-dimensional space. The borehole survey tool (14) is run down the drill string (12) in which the inner core barrel assembly (16) is installed. The inner core barrel assembly (16) is arranged to either provide or facilitate detection of an indication of tool face of a core sample (24) held in the inner core barrel assembly (16). The indication of tool face is then transferred mechanically or electronically to the visiting borehole survey tool (14).

Embodiments include a core plug holding apparatus including a tubular member configured to be inserted into a side pocket of a mandrel, the tubular member having an uphole end, a downhole end, and a core plug section located between the uphole end and the downhole end, wherein the core plug section is used for housing of one or more core plug samples and wherein tubular member includes one or more orifices formed in the core plug section. Embodiments include a method of sampling a well including deploying one or more core plug holding apparatuses into one or more side pocket mandrels of a completion; holding the one or more core plug holding apparatuses in the one or more side pocket mandrels for an incubation period; and retrieving the one or more core plug holding apparatuses from the one or more side pocket mandrels after the passage of the incubation period.

Embodiments include a core plug holding apparatus including a tubular member configured to be inserted into a side pocket of a mandrel, the tubular member having an uphole end, a downhole end, and a core plug section located between the uphole end and the downhole end, wherein the core plug section is used for housing of one or more core plug samples and wherein tubular member includes one or more orifices formed in the core plug section. Embodiments include a method of sampling a well including deploying one or more core plug holding apparatuses into one or more side pocket mandrels of a completion; holding the one or more core plug holding apparatuses in the one or more side pocket mandrels for an incubation period; and retrieving the one or more core plug holding apparatuses from the one or more side pocket mandrels after the passage of the incubation period.

A sealed pressured horizontal directional drilling continuous coring device for engineering geological investigation includes an outer tube assembly and an inner tube assembly matching the outer tube assembly. The outer tube assembly includes a single-wall drill pipe and a dual-wall drill pipe assembly. The inner wall of the dual-wall drill pipe assembly is sequentially provided with a bullet stop head, a bullet room, a suspended seat ring, a positioning inner lock, a positioning outer lock, a first centralizing ring, a lock ring seat and a drill from top to bottom. The inner tube assembly includes a spear head, a first sealing component, a bullet positioning mechanism, a recovery pipe, a second sealing component, an in-place reporting mechanism, a core blockage alarm mechanism, a single-action mechanism, a guiding mechanism, a buffer mechanism, an adjustment mechanism, a core tube and a core clamping mechanism.

A sealed pressured horizontal directional drilling continuous coring device for engineering geological investigation includes an outer tube assembly and an inner tube assembly matching the outer tube assembly. The outer tube assembly includes a single-wall drill pipe and a dual-wall drill pipe assembly. The inner wall of the dual-wall drill pipe assembly is sequentially provided with a bullet stop head, a bullet room, a suspended seat ring, a positioning inner lock, a positioning outer lock, a first centralizing ring, a lock ring seat and a drill from top to bottom. The inner tube assembly includes a spear head, a first sealing component, a bullet positioning mechanism, a recovery pipe, a second sealing component, an in-place reporting mechanism, a core blockage alarm mechanism, a single-action mechanism, a guiding mechanism, a buffer mechanism, an adjustment mechanism, a core tube and a core clamping mechanism.

A retrievable core sampling assembly for latching to or relative to a rotatable tubular housing of a core sampling apparatus to allow the capture and retrieval of a core from a subterranean formation, the assembly comprising or including: a core catcher barrel for a core, the barrel being rotationally isolated from the tubular housing and cooperable with a core taking bit coupled to the rotatable tubular housing to retain a core, and a hammer for providing impact to the core taking bit along a longitudinal impact path that is or is substantially decoupled from the core catcher barrel so that when latched, rotation and impact of the core taking bit captures and passes core material from the formation to the core catcher barrel in manner that isolates a core in the core catcher barrel from rotation and impact forces.