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In-situ combustion shaft-combustion-preventing fire-extinguishing tail pipe and application thereof

A technology for burning oil layers and oil pipes, which is applied in fire prevention equipment, fire rescue, wellbore/well components, etc., can solve the problems of undiscovered oil layer fire prevention and fire extinguishing technology in wellbore, and achieve simple design, good fire extinguishing effect, and timely disposal Effect

Active Publication Date: 2018-06-12
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] After investigation, no relevant reports were found on the simple and effective anti-wellbore combustion fire extinguishing technology for burning oil formations

Method used

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  • In-situ combustion shaft-combustion-preventing fire-extinguishing tail pipe and application thereof

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Effect test

Embodiment 1

[0025] See figure 1 , is a structural schematic diagram of the wellbore combustion prevention fire extinguishing tailpipe of the present invention. As shown in the figure, the fire extinguishing tailpipe of the present invention includes a first oil pipe (oil pipe A) 2 and a second oil pipe (oil pipe B) 4 connected in series up and down; wherein, the top of the first oil pipe 2 is an upper sealing material (sealing anti-pressure valve ) 1, the bottom end of the first oil pipe 2 and the top end of the second oil pipe 4 are sealed and connected by an intermediate sealing material 3, and the bottom end of the second oil pipe 4 is the sealing end of the oil pipe; and, ABC dry powder fire extinguishing agent is filled in the first oil pipe 2 ( Such as sodium bicarbonate dry powder, modified sodium salt dry powder, potassium salt dry powder, ammonium dihydrogen phosphate dry powder, diammonium hydrogen phosphate dry powder, phosphoric acid dry powder and amino dry powder for fire ex...

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Abstract

The invention provides an in-situ combustion shaft-combustion-preventing fire-extinguishing tail pipe and application thereof. The fire-extinguishing tail pipe comprises a first oil pipe and a secondoil pipe which are connected in series up and down. An upper sealing material (a sealed pressure release valve) is arranged at the top end of the first oil pipe; the bottom end of the first oil pipe and the top end of the second oil pipe are connected in a sealed mode through a middle sealing material; the bottom end of the second oil pipe is an oil pipe sealing end; the first oil pipe is internally filled with an ABC dry powder fire-extinguishing agent, and the second oil pipe is internally filled with magnesium carbonate solid; and the upper sealing material chooses a metal material with themelting point being 660 DEG C, and the middle sealing material chooses a metal material with the melting point being 600 DEG C. When a shaft is violently combusted, the fire-extinguishing tail pipe can release a large amount of flame-retardant gas, fire behavior is controlled, and test equipment and a sleeve are protected.

Description

technical field [0001] The invention relates to a wellbore combustion prevention and fire extinguishing tailpipe for inflamed oil layers and its application. When the wellbore burns violently, it can release a large amount of flame-retardant gas, control the fire, and protect testing equipment and casings. It belongs to the field of oil field safety development. Background technique [0002] Incineration oil layer technology, also known as fire flooding, is a recovery technology that can greatly increase the recovery of heavy oil reservoirs. It mainly uses heavy components in formation crude oil as fuel, and uses air or oxygen-enriched gas as a combustion aid. Adopt methods such as spontaneous combustion and artificial ignition to make the temperature of the oil layer reach the ignition point of crude oil, and continuously inject a combustion accelerant to make the crude oil in the oil layer continue to burn. Cracking at high temperature, injected gas, light oil produced by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B35/00E21B43/243A62C3/06A62C37/11
CPCA62C3/06A62C37/11E21B35/00E21B43/243
Inventor 马春宝李明王德伟尉小明高玉军贾财华于俊梅马子健段效威刘长环李润富
Owner PETROCHINA CO LTD
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