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Hydrochloric acid-resistant soluble bridge plug and preparation method and application thereof

A technology resistant to hydrochloric acid and bridge plugs, which is applied in earthwork drilling, wellbore/well components, pretreatment surfaces, etc., can solve problems such as inability to guarantee construction safety, and achieve the effect of reducing construction time

Inactive Publication Date: 2021-04-09
CHENGDU INNOX TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, construction safety cannot be guaranteed

Method used

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  • Hydrochloric acid-resistant soluble bridge plug and preparation method and application thereof
  • Hydrochloric acid-resistant soluble bridge plug and preparation method and application thereof

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[0034] The present application discloses an embodiment of a method for preparing a hydrochloric acid-resistant soluble bridge plug, comprising the following steps:

[0035] S1: Prepare a soluble bridge plug, and perform micro-arc oxidation treatment on the surface of the soluble bridge plug. In the embodiments disclosed in this application, the micro-arc oxidation can be treated by using the existing micro-arc oxidation process, and this application does not make specific limitations , micro-arc oxidation is through the combination of electrolyte and corresponding electrical parameters, relying on the instantaneous high temperature and high pressure generated by arc discharge on the surface of magnesium alloy, to grow a ceramic film mainly composed of matrix metal oxide, through the soluble bridge plug Micro-arc oxidation, so that a layer of micro-arc oxidation layer can be produced on the surface of the soluble bridge plug.

[0036] For ease of understanding, this application...

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Abstract

The invention relates to a hydrochloric acid-resistant soluble bridge plug and a preparation method and application thereof. The preparation method comprises the following steps that the soluble bridge plug is prepared, and micro-arc oxidation treatment is conducted on the surface of the soluble bridge plug; hydrochloric acid-resistant paint is coated on the surface of the soluble bridge plug subjected to the micro-arc oxidation treatment; and epoxy glue is filled in a gap between a slip bowl and slip teeth in the soluble bridge plug, so that the epoxy glue is cured. The surface of the soluble bridge plug is subjected to micro-arc oxidation treatment, so that a micro-arc oxidation layer is formed on the surface of the soluble bridge plug, micropores formed after micro-arc oxidation are sealed by coating the hydrochloric acid-resistant paint, and the gap between the slip bowl and the slip teeth is filled with the epoxy resin, so that the soluble bridge plug has the advantages of hydrochloric acid resistance, and can meet the petroleum fracturing construction requirements.

Description

technical field [0001] The invention belongs to the field of petroleum fracturing equipment, and in particular relates to a hydrochloric acid-resistant soluble bridge plug and a preparation method and application thereof. Background technique [0002] At present, there are many unconventional oil and gas fields in the field of oil and gas. Unconventional oil and gas fields need to artificially transform the bottom layer to obtain higher production. The common way to transform the formation is fracturing. For some special formations, acid fracturing is required. However, the matrix of general soluble bridge plugs is magnesium alloy. After the magnesium contacts with hydrochloric acid, a violent reaction will occur, a large amount of heat will be released and a large amount of hydrogen gas will be generated. Thereby construction safety cannot be guaranteed. The above-mentioned problems are technical problems urgently needed to be solved in this area. Contents of the invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/26B05D1/38B05D1/02B05D3/00E21B33/134
CPCB05D7/26B05D7/58B05D7/584B05D7/586B05D1/02B05D3/002E21B33/134
Inventor 曾琦军徐鹏
Owner CHENGDU INNOX TECH CO LTD
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