Unlock instant, AI-driven research and patent intelligence for your innovation.

Mining method of combustible ice

A mining method and ice layer technology, applied in mining fluid, earth cube drilling, underground mining, etc., can solve the problems of combustible ice layer collapse, tsunami, greenhouse effect, etc., to prevent the combustible ice layer from collapsing, the mining period is short, and the construction good safety effect

Active Publication Date: 2019-03-29
伍丕济
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem now is that, for example, during the mining process, the combustible ice layer may collapse, causing a tsunami, which poses a great threat to human beings. The combustible ice volatilizes into the air, causing a greenhouse effect and global warming. Dare not to mine rashly

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for mining combustible ice of the present invention comprises the following steps:

[0031] Step 1, drilling wells, drilling a first well extending from top to bottom on the top of the combustible ice layer, drilling a second well extending laterally and communicating with the first well in the combustible ice layer;

[0032] Step 2, cementing, setting casings in the first and second wells, and then pouring concrete between the outer wall of the casing and the inner walls of the first and second wells to form a concrete layer;

[0033] Step 3, perforating, at least in the concrete layer in the second well corresponding to the combustible ice layer, the side wall of the casing is provided with a perforating gun to communicate with the inner hole of the casing and the hole in the combustible ice layer;

[0034] Step 4, mining, injecting air at a temperature of 200°C and a pressure of 10 MPa into one of the second wells through the first well, and closing the well...

Embodiment 2

[0036] A method for mining combustible ice of the present invention comprises the following steps:

[0037] Step 1, drilling wells, drilling a first well extending from top to bottom on the top of the combustible ice layer, drilling 5 second wells extending laterally and communicating with the first well in the combustible ice layer;

[0038] Step 2, cementing, setting casings in the first and second wells, and then pouring concrete between the outer wall of the casing and the inner walls of the first and second wells to form a concrete layer;

[0039] Step 3, perforating, at least in the concrete layer in the second well corresponding to the combustible ice layer, the side wall of the casing is provided with a perforating gun to communicate with the inner hole of the casing and the hole in the combustible ice layer;

[0040] Step 4, mining, injecting air with a temperature of 1000°C and a pressure of 20 MPa into one of the second wells through the first well, and sealing the ...

Embodiment 3

[0042] A method for mining combustible ice of the present invention comprises the following steps:

[0043] Step 1, drilling wells, drilling a first well extending from top to bottom on the top of the combustible ice layer, drilling 10 second wells extending laterally and communicating with the first well in the combustible ice layer;

[0044] Step 2, cementing, setting casings in the first and second wells, and then pouring concrete between the outer wall of the casing and the inner walls of the first and second wells to form a concrete layer;

[0045] Step 3, perforating, at least in the concrete layer in the second well corresponding to the combustible ice layer, the side wall of the casing is provided with a perforating gun to communicate with the inner hole of the casing and the hole in the combustible ice layer;

[0046] Step 4, mining, injecting air at a temperature of 2000°C and a pressure of 30 MPa into one of the second wells through the first well, and sealing the w...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an exploitation method of combustible ice. The exploitation method comprises the following steps that 1, well drilling is conducted, specifically, a first well extending from top to bottom is drilled in the top of a combustible ice layer, and at least one second well which extends transversely and communicates with the first well is drilled in the combustible ice layer; 2, well cementation is conducted, specifically, a guide pipe is arranged in the first well and the second wells, then the space between the outer wall face of the guide pipe and the inner wall face of the first well as well as the space between the outer wall face of the guide pipe and the inner wall face of each second well are grouted with concrete, and thus a concrete layer is formed; 3, perforation is conducted, specifically, at least an inner hole communicating with the guide pipe and a hole of the combustible ice layer are formed in the portion, corresponding to the combustible ice layer, of the concrete layer of each second well and the side wall of the guide pipe with a perforating gun; and 4, exploitation is conducted. By the adoption of the exploitation method, the combustible ice layer can be prevented from being collapsed, more second wells can be drilled, the exploration and exploitation period is short, the construction safety is good, the production cost is low, and the economical efficiency is good.

Description

technical field [0001] The invention relates to natural gas mining technology, in particular to a method for mining combustible ice. Background technique [0002] After 20-30 years, there will be energy shortage all over the world. According to research and survey exploration, combustible ice (gas hydrate) has been found in the ocean, which can be used by humans for about 1,000 years. Combustible ice has been discovered on the Qinghai-Tibet Plateau in my country, with a storage capacity of about 35 billion tons, which can be used for 35 years. [0003] The aforementioned combustible ice is natural gas hydrate (Natural Gas Hydrate, referred to as Gas Hydrate) distributed in deep-sea sediments or permafrost in land areas. It is an ice-like crystalline substance formed by natural gas and water under high-pressure and low-temperature conditions. It is called "combustible ice", "solid gas" or "air ice" because of its ice-like appearance and its ability to burn when exposed to f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/295E21B43/243E21B43/01E21B43/30
CPCE21B41/0099E21B43/01E21B43/243E21B43/295E21B43/305
Inventor 伍丕庆伍丕济
Owner 伍丕济