Building method of mineshaft for exploring natural gas hydrate

A technology for natural gas and hydrate, which is applied in the development of fluid, wellbore lining, construction, etc., can solve the problems affecting the large-scale exploitation of natural gas hydrate, and achieve the effect of convenient large-scale exploitation.

Inactive Publication Date: 2012-03-14
范福仓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the exploitation of natural gas hydrate is still in the trial stage. During the exploitation process, how to extract natural gas hydrate from the ground has not yet been a suitable method, which has affected the large-scale exploitation of natural gas hydrate

Method used

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  • Building method of mineshaft for exploring natural gas hydrate
  • Building method of mineshaft for exploring natural gas hydrate
  • Building method of mineshaft for exploring natural gas hydrate

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Embodiment Construction

[0013] exist figure 1 Among them, there is a continental shelf (4) on the seabed, and there are natural gas hydrates (5) below the continental shelf (4). When the natural gas hydrate (5) is exploited, the wellbore (10) is first excavated on the continental shelf (4) on the seabed, and the wellbore ( 10) After digging, build the shaft base (6) around the position of the shaft (10) above the continental shelf (4), leave a prefabricated hole on the upper part of the shaft base (6), and then place it on the mining platform (1) , hoist the pre-made cylindrical prefabricated part (2) into the wellbore base (6) at the bottom of the wellbore, and make the lower part of the cylindrical prefabricated part (2) just on the wellbore base (6) In the prefabricated hole above, then by analogy, the remaining cylindrical prefabricated parts are put into the well shaft (10) the inside successively, until reaching the sea surface, so the well shaft has just been built. There is a layer of sealin...

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Abstract

The invention provides a building method of a mineshaft for exploring natural gas hydrate. The method comprises the steps of: manufacturing a plurality of cylindrical prefabricated parts before the natural gas hydrate is explored, wherein a plurality of prefabricated holes are reserved at the middle parts of prefabricated blocks at the upper parts of the cylindrical prefabricated parts, the lower parts of the cylindrical prefabricated parts are provided with connecting columns, a layer of seal material is arranged on each connecting column to prevent sea water from flowing into the mineshaft, and the prefabricated holes exactly correspond to the connecting columns; digging the mineshaft on a continental shelf at the bottom of the sea; building a mineshaft base around the mineshaft on the continental shelf at the bottom of the sea, wherein prefabricated holes are also reserved at the upper part of the mineshaft base; suspending the cylindrical prefabricated parts on an exploring platform and putting the cylindrical prefabricated parts into the mineshaft base at the bottom of the mineshaft, so that the connecting columns are exactly put in the prefabricated holes on the mineshaft base; and connecting the residual cylindrical prefabricated parts with one another in the same way till reaching the sea surface, and finally completing the building of the mineshaft.

Description

Technical field [0001] The invention relates to a method for constructing a well shaft used in the exploitation of natural gas hydrate. Background technique [0002] At present, the exploitation of natural gas hydrate is still in the trial stage. During the exploitation process, there is still no suitable method for how to extract natural gas hydrate from the ground, which affects the large-scale exploitation of natural gas hydrate. Contents of the invention [0003] In order to overcome the current situation, the exploitation of natural gas hydrate is still in the trial stage. In the process of exploitation, how to extract natural gas hydrate from the ground has not yet been a suitable method, which has affected the large-scale production of natural gas hydrate. In view of the shortage of large-scale production, the present invention provides a method for constructing a wellbore used in the production of natural gas hydrates, which enables large-scale production of natura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D5/01E21B43/01
CPCE21B41/0099
Inventor 范福仓
Owner 范福仓
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