DEVICE FOR OBTAINING CORE FROM HYDRATE-CONTAINING ROCKS Russian patent published in 2011 - IPC E21B25/00 

FIELD: oil and gas industry.

SUBSTANCE: device includes double core equipment including rock destruction tool, external core barrel, coupling adapter, non-rotating internal pipe with suspension and fixation assembly and with cooling system containing compartment with liquefied gas bottle and throttle; upper coupling adapter, lower coupling adapter in which circulation channels and non-return valve, detachable core barrel with core-retaining device is located. Cooling system is equipped with compartment of gas ejector the nozzle of which is fixed in upper coupling adapter, and diffuser is fixed in lower coupling adapter in which an outlet channel is also provided.

EFFECT: higher sampling quality of core samples and preservation of their natural composition, structure and properties.

1 dwg