Method for preparing calcium bromide solution used for oil drilling

An oilfield drilling and calcium bromide technology, applied in chemical instruments and methods, drilling compositions, calcium/strontium/barium bromide, etc., to achieve the effects of simple operation, simplified process, and reduced production costs

Inactive Publication Date: 2010-01-06
SHANDONG TIANXIN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process does not require evaporation and cooling processes, uses cheap and easy-to-obtain quicklime, reduces production costs, and is easy to operate; overcomes the defect that the product prepared by the existing proces...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 500Kg of calcium bromide aqueous solution (the content of calcium bromide is 53%) is dropped into the reactor in advance, and under stirring condition, 500Kg of calcium oxide is dropped into the reactor. Turn on the vacuum pump to make the vacuum degree in the reactor reach 0.07Mpa, then add 2800Kg of hydrobromic acid with a mass fraction of 48% into the reactor dropwise for 1.4 hours. Under the conditions of reaction of calcium oxide and hydrobromic acid for 1.9 hours, the reaction feed liquid A was obtained; under the conditions of stirring and temperature 80-85°C, 400Kg calcium hydroxide was added to the reaction feed liquid A, and then the mixture was stirred and the temperature was 80-80°C. 85 DEG C and under the above-mentioned negative pressure conditions, dropwise add 2000Kg of hydrobromic acid with a mass fraction of 48% in the reaction feed liquid A, and the time for adding drops is 1.4 hours; Bromic acid continues to react 30 minutes, obtains feed liquid B; D...

Embodiment 2

[0017] 600Kg of calcium bromide aqueous solution (the content of calcium bromide is 53%) is dropped in the reactor in advance, and under stirring condition, 500Kg of calcium oxide is dropped in the reactor. Turn on the vacuum pump to make the vacuum degree in the reaction kettle reach 0.06Mpa, then add 2785Kg of hydrobromic acid with a mass fraction of 48% into the reaction kettle dropwise for 1.2 hours, and make the oxidation Calcium reacted with hydrobromic acid for 1.5 hours to obtain reaction feed liquid A; under the conditions of stirring and temperature 85-90°C, 440Kg calcium hydroxide was added to the reaction feed liquid A, and then under stirring, temperature 85-90°C and above-mentioned Under negative pressure conditions, add 2125Kg of hydrobromic acid with a mass fraction of 48% dropwise to the reaction feed liquid A for 1.2 hours; after the dropwise addition, continue the reaction between calcium hydroxide and hydrobromic acid under the above reaction conditions In ...

Embodiment 3

[0019] 700Kg of calcium bromide aqueous solution (the content of calcium bromide is 53%) is dropped into the reactor in advance, and under stirring condition, 500Kg of calcium oxide is dropped into the reactor. Turn on the vacuum pump to make the vacuum degree in the reaction kettle reach 0.07Mpa, then add 2700Kg of hydrobromic acid with a mass fraction of 49% into the reaction kettle dropwise for 1 hour, and make the oxidation Calcium reacts with hydrobromic acid for 1 hour to obtain reaction feed liquid A; under the condition of stirring and temperature 82-88°C, 550Kg calcium hydroxide is added in the reaction feed liquid A, and then under stirring, temperature 82-88°C and above-mentioned Under the condition of negative pressure, in the reaction feed liquid A, dripping mass fraction is 2000Kg of hydrobromic acid of 49%, and the time of dropping is 1 hour; React for 15 minutes to obtain feed liquid B; detect the pH of feed liquid B, and its pH value is 8.5, add hydrobromic ac...

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PUM

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Abstract

The invention discloses a method for preparing calcium bromide solution used for oil drilling, comprising the following steps: (1) adding calcium bromide solution into a kettle to be used as a reaction carrier, and then throwing calcium oxide, dripping hydrobromic acid, obtaining reaction liquid material A after reaction; (2) throwing calcium hydroxide into the reaction liquid material A obtained in step (1); dripping hydrobromic acid to carry out reaction until the reaction is completed; after the completeness of the reaction, then carrying out bleaching, sedimentation, filter pressing, fine filter on reaction completed liquid to obtain the calcium bromide solution used for oil drilling, wherein, the yield rate is more than 97%. The process eliminates the processes of evaporation and cooling, thereby increasing the yield rate and lowering the production costs, in addition, no organic impurities are precipitated in the process of long time placement of the prepared calcium bromide product, thereby having stable product quality and significant economic benefits.

Description

technical field [0001] The invention relates to a method for preparing a calcium bromide solution for oil field drilling, in particular to a method for preparing a calcium bromide solution by utilizing quicklime. Background technique [0002] Calcium bromide is used as a sedative in medicine, acting on the central nervous system to strengthen the inhibition process of the cerebral cortex, and also used to synthesize drugs for the treatment of neurasthenia and epilepsy; it can be used as chemical analysis and photosensitive paper, mineral water, refrigerant It is an important component of fire extinguishing agent; it can also produce ammonium bromide, developer of photographic industry, etc. [0003] The cleaning and finishing fluid compounded with high specific gravity calcium bromide solution as a carrier has been widely concerned by users because it can greatly increase the crude oil output rate in the process of oil drilling, well completion and workover. As early as the...

Claims

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Application Information

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IPC IPC(8): C01F11/34C09K8/00
Inventor 单美青刘中华孟烨李国防闫晓红赵庭栋
Owner SHANDONG TIANXIN CHEM
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