Jet flow crushing suction recovery device suitable for natural gas hydrate exploitation

A technology of jet crushing and recovery device, which is applied in the fields of exploiting fluids, drilling with liquid/gas jets, and earth-moving drilling, etc., can solve problems such as the inability to achieve continuous mining, improve drilling efficiency, ensure equipment safety and reliability, and improve recovery. The effect of efficiency

Inactive Publication Date: 2020-06-30
SOUTHWEST PETROLEUM UNIV +1
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  • Application Information

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Problems solved by technology

In the prior art, although there are hydrate production devices, continuous production cannot be realized

Method used

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  • Jet flow crushing suction recovery device suitable for natural gas hydrate exploitation
  • Jet flow crushing suction recovery device suitable for natural gas hydrate exploitation
  • Jet flow crushing suction recovery device suitable for natural gas hydrate exploitation

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing:

[0019] A jet crushing suction recovery device suitable for natural gas hydrate exploitation, such as figure 1 As shown, the device includes an upper joint 1, a differential pressure sliding sleeve 3, a sleeve 2, a flow splitter 10, a nozzle 8, and an inner pipe 7; the upper joint 1 connects the outer tube of the double-layer continuous tube and the sleeve; the described The differential pressure sliding sleeve 3 is located in the casing cavity and is pressed against the end surface of the upper joint under the action of the spring 5; the said flow diverter joint 10 is connected with the inner pipe 7, the casing pipe 2, and the lower downhole tool; the said nozzle 8 is installed on the flow diverter On the joint 10; the inner tube 7 is connected with the inner tube of the double-layer continuous tube through a plug-in seal.

[0020] Further, the top of the differential pres...

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Abstract

The invention relates to a jet flow crushing suction recovery device suitable for natural gas hydrate exploitation. The device comprises an upper connector, a differential pressure sliding sleeve, a casing pipe, a flow dividing connector, a nozzle and an inner pipe. The upper joint is connected with a double-layer continuous pipe outer pipe and the casing pipe, the differential pressure sliding sleeve is located in a casing pipe cavity and abuts against the end face of the upper connector under the action of a spring, and the flow dividing connector is connected with the inner pipe, the casingpipe and a lower downhole tool; and the nozzle is mounted on the flow dividing connector, and a mixing cavity, a throat part and a diffusion section are machined in an inner cavity of the inner pipeand are connected with a double-layer continuous pipe inner pipe through insertion type sealing. By means of the jet flow crushing suction recovery device, switching of hydrate pilot hole drilling anddrag-back crushing and negative pressure suction and lifting of hydrate slurry can be achieved, the drilling cost is reduced, the drilling time is saved, and the drilling recovery efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of natural gas hydrate exploitation, in particular to a jet suction crushing device for natural gas hydrate exploitation. Background technique [0002] Natural gas hydrate, also known as "combustible ice", is an unconventional energy source with high density and high calorific value. In the case of dwindling oil and gas resources, the development of gas hydrate has become an inevitable trend. [0003] At present, hydrate mining methods mainly include heating mining method, depressurization method, chemical reagent method, carbon dioxide replacement method, solid-state fluidization method, etc. Among them, the solid-state fluidization mining technology is proposed for the sampling of hydrates in my country's sea areas, which reduces the possible environmental risks caused by the decomposition of shallow hydrates and achieves green and controllable mining. In the prior art, although there are hydrate product...

Claims

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Application Information

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IPC IPC(8): E21B43/01E21B7/18E21B21/00
CPCE21B7/185E21B21/001E21B43/01
Inventor 钟林余兴勇王国荣刘清友周守为李中李清平李炎军付强刘和兴何玉发
Owner SOUTHWEST PETROLEUM UNIV
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