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Cavity making tool for salt cavern gas storage

A technology for gas storage and cavity making, which is applied in mining equipment, mining equipment, earthwork drilling, etc., can solve problems such as the inability to increase the speed of clean water, achieve significant economic and social benefits, improve construction benefits, and save cavity making time. Effect

Pending Publication Date: 2021-05-21
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing cavitation string cannot increase the speed of clear water reaching the surface of the cavity

Method used

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  • Cavity making tool for salt cavern gas storage
  • Cavity making tool for salt cavern gas storage
  • Cavity making tool for salt cavern gas storage

Examples

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Embodiment 1

[0029] Such as Figure 1 to Figure 5 As shown, the cavity building tool for salt cavern gas storage in this embodiment includes an outer pipe 1, an inner pipe 2, a first universal steering nipple 3, a second universal steering nipple 3', and a guide pipe 4 (the length of the curved section is about 30m, the central angle of the bending section is 90°), the steering power nipple 5 and the high-pressure nozzle 6; the outer pipe is sleeved outside the inner pipe; the upper end of the first universal steering nipple is connected to the outer pipe, and the lower end is connected to the guide pipe to The outer pipe and the guide pipe can rotate relatively; the upper end of the second universal steering nipple is connected to the inner pipe, and the lower end is connected to the steering power nipple, so that the inner pipe and the steering power nipple can rotate relatively; the high-pressure nozzle is set on the steering power nipple Bottom; the inner pipe, the second universal ste...

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Abstract

The invention provides a cavity making tool for a salt cavern gas storage. The cavity making tool comprises an outer pipe (1), an inner pipe (2), a first universal steering short section (3), a second universal steering short section (3'), a guide pipe (4), a steering power short section (5) and a nozzle (6); the inner pipe is sleeved with the outer pipe; the upper end of the first universal steering short section is connected with the outer pipe, and the lower end is connected with the guide pipe, so that the outer pipe and the guide pipe can rotate relatively; the upper end of the second universal steering short section is connected with the inner pipe, and the lower end is connected with the steering power short section, and the inner pipe and the steering power short section can rotate relatively; the nozzle is arranged at the bottom of the steering power short section; and the inner pipe, the second universal steering short section, the steering power short section and the nozzle are sequentially connected to form an inner pipeline (7), the outer pipe, the first universal steering short section and the guide pipe are sequentially connected to form an outer pipeline (8), the inner pipeline can penetrate through an inner cavity of the outer pipeline, and the penetrating direction of the inner pipeline is changed through the guide pipe.

Description

technical field [0001] The invention relates to the field of natural gas injection and production, in particular, the invention relates to a cavity building tool for a salt cavern gas storage. Background technique [0002] The salt cavern gas storage is to use clean water to dissolve the underground salt layer into a closed space of a certain shape and volume to store natural gas and adjust the seasonal supply and demand imbalance of natural gas. The current conventional cavity-making technology is to move the cavity-making string up and down and perform positive and negative circulation. Since the final volume of the dissolved cavity is more than 200,000 square meters and the diameter can reach 80m, and the cavity-making string can only move up and down, the clean water injected from the wellhead has a long distance from the lower end of the cavity-making string to the surface of the cavity, and cannot quickly reach the cavity ; It takes a long time to diffuse to the surfa...

Claims

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Application Information

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IPC IPC(8): E21F17/16
CPCE21F17/16
Inventor 王云李福堂佘治成刘瑞莹黎强李隽刘岩曹光强李楠王浩宇张义贾敏
Owner PETROCHINA CO LTD
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