Disclosed herein is a device and method for correlating core sample zones with an actual subterranean depth. The disclosed device has a pair of independent distance measuring devices operably in communication with a core sample apparatus where a first distance measuring device measures the length of a core sample entering a core sampling tube and a second distance measuring device measures a drive depth of the core sampling tube entering into the ground. A processing unit is provided for correlating the two distances so as to allow a determination as to the actual depth below ground from where a given zone of the core sample is extracted.

A transfer and online detection system for deep-sea sediment samples and an application method thereof are provided. A sample gripping and feeding device, a sample segment cutting device, a sample online detection device, a high-pressure ball valve and a pressure-retaining drill disengaging device of the system are coaxially connected with one another. A seawater booster pump is connected with a water inlet ball valve, and a valve control panel is connected with the sample gripping and feeding device, the sample segment cutting device, the high-pressure ball valve and the pressure-retaining drill disengaging device. The pressure-retaining drill disengaging device is configured for disengaging an inner barrel and an inner barrel joint, and the sample gripping and feeding device and the sample segment cutting device are configured for gripping and cutting core samples, and conveying the cut core samples into a subsample pressure-retaining storage cylinder for storage.

A transfer and online detection system for deep-sea sediment samples and an application method thereof are provided. A sample gripping and feeding device, a sample segment cutting device, a sample online detection device, a high-pressure ball valve and a pressure-retaining drill disengaging device of the system are coaxially connected with one another. A seawater booster pump is connected with a water inlet ball valve, and a valve control panel is connected with the sample gripping and feeding device, the sample segment cutting device, the high-pressure ball valve and the pressure-retaining drill disengaging device. The pressure-retaining drill disengaging device is configured for disengaging an inner barrel and an inner barrel joint, and the sample gripping and feeding device and the sample segment cutting device are configured for gripping and cutting core samples, and conveying the cut core samples into a subsample pressure-retaining storage cylinder for storage.

The present disclosure provides a portable seafloor drill rig for a submersible for multi-point core drilling, including a power head, a reduction gear box, an emergency jettison device, a drilling tool, and a temperature and pressure-retaining device. a water supply connector and the power head are arrange on a top plate of the reduction gear box. An output shaft of the power head is connected to an input shaft of the reduction gear box, and an output shaft of the reduction gear box is provided with a central hole, which is in communication with a water inlet hole of the water supply connector. An output shaft of the reduction gear box is connected to the emergency jettison device, and the temperature and pressure-retaining device can perform temperature and pressure-retaining storage of the core drilled by the drilling tool.

The present disclosure provides a portable seafloor drill rig for a submersible for multi-point core drilling, including a power head, a reduction gear box, an emergency jettison device, a drilling tool, and a temperature and pressure-retaining device. a water supply connector and the power head are arrange on a top plate of the reduction gear box. An output shaft of the power head is connected to an input shaft of the reduction gear box, and an output shaft of the reduction gear box is provided with a central hole, which is in communication with a water inlet hole of the water supply connector. An output shaft of the reduction gear box is connected to the emergency jettison device, and the temperature and pressure-retaining device can perform temperature and pressure-retaining storage of the core drilled by the drilling tool.

The invention relates to an underwater drilling device and to a method for procuring drill cores of a bed of a body of water, wherein an underwater drilling device with a base frame is lowered in a body of water and placed on a bed of a body of water. A drill string consisting of at least one tubular drill string element is drilled out into the bed of the body of water in a first drilling step with a drill drive, with a drill core being formed in a receptacle in the tubular drill string element and being received in a core barrel in the drill string element. According to the invention, the drill core is enclosed in pressure-tight manner in a receiving container on the basic cradle under water.

The invention relates to an underwater drilling device and to a method for procuring drill cores of a bed of a body of water, wherein an underwater drilling device with a base frame is lowered in a body of water and placed on a bed of a body of water. A drill string consisting of at least one tubular drill string element is drilled out into the bed of the body of water in a first drilling step with a drill drive, with a drill core being formed in a receptacle in the tubular drill string element and being received in a core barrel in the drill string element. According to the invention, the drill core is enclosed in pressure-tight manner in a receiving container on the basic cradle under water.

A sock for a floating platform including a plurality of tubulars coupled together and defining a bore and a catcher assembly. The catcher assembly including a plurality of orifices formed in at least one of the plurality of tubulars, a catcher releasably coupled to the plurality of tubulars by a plurality of shearable members, wherein the catcher is disposed in the bore, and wherein the catcher is movable from a first position to a second position, and a stop flange having at least one aperture.

A sock for a floating platform including a plurality of tubulars coupled together and defining a bore and a catcher assembly. The catcher assembly including a plurality of orifices formed in at least one of the plurality of tubulars, a catcher releasably coupled to the plurality of tubulars by a plurality of shearable members, wherein the catcher is disposed in the bore, and wherein the catcher is movable from a first position to a second position, and a stop flange having at least one aperture.

A sock for a floating platform including a plurality of tubulars coupled together and defining a bore and a catcher assembly. The catcher assembly including a plurality of orifices formed in at least one of the plurality of tubulars, a catcher releasably coupled to the plurality of tubulars by a plurality of shearable members, wherein the catcher is disposed in the bore, and wherein the catcher is movable from a first position to a second position, and a stop flange having at least one aperture.