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Formula, preparation method of solid corrosion inhibitor and its using method

A corrosion inhibitor and solid technology, applied in the direction of mining fluid, earthwork drilling, wellbore/well parts, etc., can solve the problems of difficult to reach the bottom of the well, inconvenient operation, large dosage, etc., to increase crude oil production and anti-corrosion efficiency High and prolong oil recovery effect

Inactive Publication Date: 2007-02-14
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0003] The purpose of the present invention is: to overcome the inconvenient operation of adding liquid to the liquid corrosion inhibitor; it is difficult to reach the bottom of the well, and the anti-corrosion effect on the bottom of the wellbore cannot be achieved; the effective period of the liquid corrosion inhibitor is short and the dosage is large; it is suitable for some serious corrosion environments , the shortcomings of the poor effect of liquid corrosion inhibitors, providing a high-temperature-resistant solid corrosion inhibitor formulation, preparation method and use method for oil well pipe string anticorrosion

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  • Formula, preparation method of solid corrosion inhibitor and its using method
  • Formula, preparation method of solid corrosion inhibitor and its using method
  • Formula, preparation method of solid corrosion inhibitor and its using method

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Embodiment Construction

[0024] Formulation example, the solid corrosion inhibitor of the present invention is prepared from the following raw materials in weight ratio: a certain dibasic acid, 34%; diethylenetriamine, 12%; chloroacetic acid, 10%; dodecyl Sodium benzenesulfonate, 10%; Hexamethylenetetramine, 8%; Hydrolyzed polymaleic anhydride (HPMA), 8%; Polyepoxysuccinic acid, 8%; Epoxy resin, 4%; Polyamide resin, 4%.

[0025] The concrete preparation method embodiment of the present invention adopts the formula in the formula embodiment, comprises the following steps:

[0026] A. Synthesis of intermediates: Put a dibasic acid in a reaction tank, turn on the heater, and stir while heating. When the temperature reaches 150°C, add diethylenetriamine, and keep stirring, keep the temperature for 130 minutes, and heat up to 200°C, constant temperature reaction for 4 hours. Stop heating, after cooling to 80°C, add chloroacetic acid dropwise, react for 1.5 hours, and finally evaporate the solvent to obta...

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Abstract

The invention relates to a high temperature resistant solid corrosion inhibitor manufacturing and using method used in oil pipe and casing pipe. Its raw material preparation weight ratios are as follows: some dibasic acid 20-35%, diethylene triamine 5-15%, chloroacetic acid 5-15%, and sodium dodecyl benzene sulfonate, hexamethenyl tetramine, HPMA, poly epoxy succinic acid, epoxy resin, polyamide resins etc. The manufacturing method includes composing intermediate, preparing solid inhibitor, solidifying, forming, cooling to gain solid inhibitor finished product.

Description

Technical field: [0001] The invention relates to a corrosion inhibitor for oil well anticorrosion, in particular to a high-temperature-resistant solid corrosion inhibitor for high-temperature anticorrosion of oil pipes and casings, a preparation method and a use method thereof. Background technique: [0002] In the process of oil extraction, the formation water, sulfur-containing substances and some acid gases contained in the produced well fluid are produced along with the extraction of crude oil. The content of corrosive media such as CO32-, HCO3-, Cl- in the well fluid is relatively high; in addition, some chemical construction measures have been taken to increase crude oil production. Under the combined effect of these factors, the oil well tubing and casing are severely corroded, with a corrosion rate of more than 1.0mm / a, which greatly shortens the service life of the oil well string. The corrosion of oil well strings has always been a difficult problem for oilfield w...

Claims

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Application Information

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IPC IPC(8): C23F11/04E21B43/00
Inventor 尹成先白真权赵国仙林凯严密林赵新伟韩新利
Owner BC P INC CHINA NAT PETROLEUM CORP
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