Deep-sea sediment continuous pressure maintaining coring submarine drilling machine and operation method

Abstract

The invention discloses a deep-sea sediment continuous pressure maintaining coring submarine drilling machine. A sampling pipe manipulator, a plurality of spud legs, a derrick, a drill pipe manipulator, a pipe rack, a hydraulic system, hydraulic clamping pliers, a drill pipe clamping base and an underwater control system are arranged respectively on a base, and a main body frame in installed on the base fixedly; a plurality of groups of spud legs and pile shoes of the spud legs are arranged on the base, flipping oil cylinders are hinged among the pile shoes and the spud legs, and the inner side of the upper end of each of the spud legs is hinged with a lifting oil cylinder; and the pipe rack is arranged on the upper surface of the base, a pressure maintaining drill pipe and a sampling pipe are arranged in the pipe rack, and an underwater top drive is installed in the derrick. According to the drilling machine, the drilling machine is lowered into the seafloor through an armor of an offshore platform, after the machine is lowered into the seafloor in position, bottom sediments are subjected to low-disturbance drilling and continuous multi-section coring, at the same time, each section of rock cores are subjected to operation such as pressure maintaining processing, and the deep-sea sediment continuous pressure maintaining coring submarine drilling machine has the advantages of being compact in structure, reliable in working, small in volume, light in weight, high in working efficiency, low in disturbance and high in coring efficiency.

Description

technical field [0001] The invention belongs to the technical fields of deep-sea exploration technology and ocean engineering, and relates to a deep-sea sediment continuous pressure-maintaining coring drilling machine, and the invention also relates to a deep-sea sediment continuous pressure-maintaining coring operation method. Background technique [0002] Natural gas hydrate (also known as combustible ice) is a new type of energy, mainly stored in sediments within 200m of the seabed, and is an ideal alternative energy source for oil and natural gas. At present, geophysical and other detection methods are mainly used to find combustible ice on the seafloor. Although relevant information can be obtained, they can only provide clues to whether there is combustible ice on the seafloor, and cannot be used as a basis for delineating reserves. Drilling and coring to obtain physical samples of combustible ice is the only way to delineate its reserves. [0003] Physical samples of...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a deep-sea sediment continuous pressure-maintained coring subsea drilling rig, which solves the problem that the existing technology cannot meet the needs of low-disturbance drilling of seabed sediments, continuous multi-stage coring once entering the sea, and pressure-maintaining treatment of each section of rock core. The problem

[0007] Another object of the present invention is to provide a method for continuous pressure-holding and coring of deep-sea sediments, which solves the problem that the existing technology cannot efficiently carry out exploration and sampling of sediments, and there is no continuous coring and pressure-holding operation for rock cores. ability, and also the problem of being unable to carry out exploration and survey operations of large-scale sediment cores

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