Pressure coring where the core apparatus drills the core sample and seals the core sample at its native downhole pressure (e.g., several thousand psi) may be expanded to include nuclear magnetic resonance (NMR) imaging components to produce a pressurized NMR core holder that allows for NMR imaging of the core samples having been maintained in a downhole fluid saturation state. NMR imaging performed may include 1H and also 19F imaging depending on the chamber fluid used in the pressurized NMR core holder.

Pressure coring where the core apparatus drills the core sample and seals the core sample at its native downhole pressure (e.g., several thousand psi) may be expanded to include nuclear magnetic resonance (NMR) imaging components to produce a pressurized NMR core holder that allows for NMR imaging of the core samples having been maintained in a downhole fluid saturation state. NMR imaging performed may include 1H and also 19F imaging depending on the chamber fluid used in the pressurized NMR core holder.

The present disclosure relates to the field of scientific drilling technologies, and provides a deep rock in-situ active thermal-insulation coring device and thermal-insulation coring method thereof. The coring device comprises an in-situ coring system and an in-situ truth-preserving moving system, the in-situ coring system comprises a driving module, a coring module and a thermal insulation module, and the in-situ truth-preserving moving system comprises a truth-preserving chamber storage module and a mechanical arm; the thermal insulation module comprises a coring truth-preserving chamber and a temperature regulation control system, the truth-preserving chamber storage module comprises a storage truth-preserving chamber and a temperature balance control system, the mechanical arm is mounted in the storage truth-preserving chamber, and the coring truth-preserving chamber and the storage truth-preserving chamber are mutually butted.

The present disclosure relates to the field of scientific drilling technologies, and provides a deep rock in-situ active thermal-insulation coring device and thermal-insulation coring method thereof. The coring device comprises an in-situ coring system and an in-situ truth-preserving moving system, the in-situ coring system comprises a driving module, a coring module and a thermal insulation module, and the in-situ truth-preserving moving system comprises a truth-preserving chamber storage module and a mechanical arm; the thermal insulation module comprises a coring truth-preserving chamber and a temperature regulation control system, the truth-preserving chamber storage module comprises a storage truth-preserving chamber and a temperature balance control system, the mechanical arm is mounted in the storage truth-preserving chamber, and the coring truth-preserving chamber and the storage truth-preserving chamber are mutually butted.

The present invention relates to a natural gas hydrate rotary pressure-retaining corer, including an outer tube assembly and an inner tube assembly installed inside the outer tube assembly. The inner tube assembly includes an inner tube assembly a and an inner tube assembly b. The inner tube assembly a includes a spearhead, a latch mechanism, a long tube, a middle tube sub, a short joint, a sealing sub, a connecting tube, a middle tube and a pressure-retaining ball valve closing sealing mechanism connected sequentially from top to bottom. The inner tube assembly b includes a lifting device, a latch suspension mechanism, an spirol pin sub, a single-action mechanism, a dapter, an adjustment joint, a connecting tube, a sealing mechanism, a connecting long tube, a connecting long tube sub and a core barrel connected sequentially from top to bottom.

The present invention relates to a natural gas hydrate rotary pressure-retaining corer, including an outer tube assembly and an inner tube assembly installed inside the outer tube assembly. The inner tube assembly includes an inner tube assembly a and an inner tube assembly b. The inner tube assembly a includes a spearhead, a latch mechanism, a long tube, a middle tube sub, a short joint, a sealing sub, a connecting tube, a middle tube and a pressure-retaining ball valve closing sealing mechanism connected sequentially from top to bottom. The inner tube assembly b includes a lifting device, a latch suspension mechanism, an spirol pin sub, a single-action mechanism, a dapter, an adjustment joint, a connecting tube, a sealing mechanism, a connecting long tube, a connecting long tube sub and a core barrel connected sequentially from top to bottom.

The present disclosure relates to the field of scientific drilling technology and provides a deep rock quality assurance coring device and coring method thereof. The deep rock quality assurance coring device comprises a drilling tool, a drilling bit, a central rod and a core storage body, wherein the drilling bit is mounted at the lower end of the drilling tool, the lower end of the central rod is connected to the core storage body, and the central rod is capable of driving the core storage body to move in the drilling tool in an axial direction of the drilling tool, a reservoir chamber having a lower end opening is arranged in the central rod, a core storage chamber having a lower end opening is arranged in the core storage body.

The present disclosure relates to the field of scientific drilling technologies, and provides a deep rock in-situ active thermal-insulation coring device and thermal-insulation coring method thereof. The coring device comprises an in-situ coring system and an in-situ truth-preserving moving system, the in-situ coring system comprises a driving module, a coring module and a thermal insulation module, and the in-situ truth-preserving moving system comprises a truth-preserving chamber storage module and a mechanical arm; the thermal insulation module comprises a coring truth-preserving chamber and a temperature regulation control system, the truth-preserving chamber storage module comprises a storage truth-preserving chamber and a temperature balance control system, the mechanical arm is mounted in the storage truth-preserving chamber, and the coring truth-preserving chamber and the storage truth-preserving chamber are mutually butted.

Apparatus and method for in-situ stabilization of unconsolidated sediment in core samples are disclosed. The core sampling apparatus includes a corer having an inner wall, an outer wall, and a plurality of impregnation tubes disposed between the inner and the outer wall, wherein the impregnation tubes are parallel to a central axis of the corer. The method for sampling a core includes extracting a core sample using a corer, and in-situ stabilizing unconsolidated sediment in the core sample within the corer by impregnating the core sample with a resin. The resin is supplied through a plurality of impregnation tubes disposed between the walls of the corer.

Apparatus and method for in-situ stabilization of unconsolidated sediment in core samples are disclosed. The core sampling apparatus includes a corer having an inner wall, an outer wall, and a plurality of impregnation tubes disposed between the inner and the outer wall, wherein the impregnation tubes are parallel to a central axis of the corer. The method for sampling a core includes extracting a core sample using a corer, and in-situ stabilizing unconsolidated sediment in the core sample within the corer by impregnating the core sample with a resin. The resin is supplied through a plurality of impregnation tubes disposed between the walls of the corer.