China University of Petroleum

Qishuai Yin

Jin Fang Yang

Shanshan Shi

Li Li

Hexing Liu

Laibin Zhang

Qianling Xue

Chunwei Gu

Haodong Chen

Yang Long

A deep-water drilling gas kick pilot-scale apparatus, including: a simulation wellbore having an upper wellbore transitioned to a lower wellbore through a variable cross section; a drilling tool with an annular space formed between the drilling tool and the simulation wellbore; a gas-injection system, comprising an air compressor and a gas-injection pipeline; a mud circulation system, comprising a mud supply source, a first pump, a second pump, and a mud-return pipeline; a Coriolis mass flowmeter provided on the mud-return pipeline; a Doppler sensor installed on the upper wellbore; and a built-in pressure gauge carrier connected between a drill pipe and a drill bit.

Deep-water drilling gas kick pilot-scale apparatus

A bearing capacity reinforcing device. The bearing capacity reinforcing device comprises: a reinforcing mechanism having a reinforcing body and a reinforcing disc connected to a lower portion of the reinforcing body, a plurality of reinforcing rib plates being spaced apart in a circumferential direction of the reinforcing body and connected to the reinforcing disc; wherein the reinforcing disc is provided with a plurality of accommodating spaces which are spaced apart in a circumferential direction thereof and provided therein with a movable sector plate, respectively, and the reinforcing disc at each of the accommodating spaces is provided with a perforated portion which can be blocked by the sector plate; and a connecting portion having a male buckle end connected to a lower end of the reinforcing body, and a female buckle end connected to an upper end of the reinforcing body. The present disclosure can increase the area of action between the riser or the surface conduit and the seabed soil, thereby increasing the bearing capacity of the conduit to ensure the safety and high efficiency of on-site exploration and development operations.

Internal spiral conduit bearing capacity reinforcing device and method for using the same

The present disclosure provides an apparatus and method for cleaning rock debris when deep-water surface drilling is done. The apparatus for cleaning rock debris when deep-water surface drilling is done comprises: an open barrel having an open through groove which is axially provided; a plurality of debris cleaning mechanisms connected to the open barrel at an interval in a circumferential direction of the open barrel, wherein each of the debris cleaning mechanisms comprises: a fixed block connected to an outer wall of the open barrel; a debris cleaning leg having one end rotatably connected to the fixed block, and the other end provided with a debris cleaning impeller; and a pull rod having one end connected to the outer wall of the open barrel above the fixed block, and the other end movably connected to the debris cleaning leg. The present disclosure not only cleans a large amount of rock debris accumulated around the seabed surface conduit while drilling is done in the deep-water surface drilling process, but also achieves the purpose of continuous working in the deep-water surface drilling process, without the need of frequent tripping in and out in midway to adjust the position of the apparatus for cleaning rock debris when deep-water surface drilling is done.

Apparatus and method for cleaning rock debris when deep-water surface drilling is done

The present invention provides an experimental device for simulating invasion of shallow fluid into a wellbore, comprising: a casing pipe; a drilling-in device including a drill string extending into the casing pipe, and a drill bit located within the casing pipe and connected to the drill string; a driving device for driving rotation of the drill string, the driving device being disposed outside the casing pipe and connected to the drill string; a drilling fluid injection device for injecting drilling fluid into the drill string, the drilling fluid injection device being disposed outside the casing pipe and connected to the drill string; a shallow fluid injection device for injecting shallow fluids into the casing pipe, the shallow fluid injection device being disposed outside the casing pipe and communicating with the casing pipe; a pressure detection device for detecting a pressure within the casing pipe, the pressure detection device being connected to the casing pipe.

Experimental device for simulating invasion of shallow fluid into wellbore

The present invention provides an inner start-up tool of a conduit bearing capacity reinforcing device and a using method thereof, the inner start-up tool comprising: an outer cylinder in which a pressure bearing disc is axially movably provided, a lower end of the pressure bearing disc being elastically connected with a balance block, and a first ring block and a second ring block being movably diametrically disposed through a lower cylinder walls of the outer cylinder; a first link mechanism having a first vertical rod and a first horizontal rod rotatably connected to the first vertical rod, the first vertical rod being rotatably connected to the balance block, the first horizontal rod being rotatably connected to the first ring block; a second link mechanism having a second vertical rod and a second horizontal rod rotatably connected to the second vertical rod, the second vertical rod being rotatably connected to the balance block, the second horizontal rod being rotatably connected to the second ring block. The inner start-up tool of the conduit bearing capacity reinforcing device and the using method thereof according to the present invention can be used for efficiently operating the conduit bearing capacity reinforcing device, is simple in structure and convenient in use.

Inner start-up tool of conduit bearing capacity reinforcing device

A formation respiration effect simulation device having an outer cylinder in which an artificial formation is disposed, the artificial formation having an artificial borehole, with an outer portion of the artificial formation being wrapped by an air cushion and a lower annular space being formed between the air cushion and the outer cylinder. An inner cylinder is hermetically disposed above the artificial formation, an upper annular space being formed between the inner cylinder and the outer cylinder, with the upper annular space communicating with the lower annular space. A liquid injection pipe is pierced in the inner cylinder and extends into the artificial borehole. A monitoring mechanism having a liquid level monitor is included to monitor a liquid level height of a fluid medium in the lower annular space, and a pressure sensor is disposed at a lower end surface of the inner cylinder and located within the artificial borehole.

Device and method for simulating formation respiration effect

A riser stub for acoustic resonance decomposition of hydrate in deepwater drilling, comprising a through tubular stub body, a plurality of acoustic transducers being fixedly disposed on an outer wall surface of the tubular stub body; an outer side of the tubular stub body being covered with a water insulation layer, the plurality of acoustic transducers being sealed between the tubular stub body and the water insulation layer, the water insulation layer being further provided with a power-on interface that can be connected to a power supply, the plurality of acoustic transducers being connected to the power-on interface. A riser stub for acoustic resonance decomposition of hydrate in deepwater drilling, through continuous power-on, sound waves close to a simple harmonic vibration frequency of the hydrate are generated inside the pipeline to cause the hydrate in the riser to resonate, thereby being able to effectively avoid formation of hydrate inside the pipeline; after the hydrate is formed inside the pipeline, the acoustic transducers of the riser stub are energized, by means of the acoustic waves, the hydrate blocking the pipeline is caused to resonate to break its equilibrium state and to be decomposed so as to realize de-blocking.

Growing community of inventors

Beijing, China

Qishuai Yin