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Silicone oil defoamer for drilling fluid and production process thereof

A silicone oil defoamer and drilling fluid technology, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of difficult application in low temperature environment, poor defoaming persistence, and affecting defoaming ability, and achieve excellent defoaming Efficacy, outstanding defoaming performance, and the effect of reducing surface activity

Inactive Publication Date: 2018-04-24
YUMEN OIL FIELD KEDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) It is easy to condense at low temperature and has poor fluidity, so it is difficult to apply in low temperature environment;
[0004] (2) The thermal stability is poor, and the evaporation loss is large under high temperature conditions, which seriously affects its defoaming ability;
[0005] (3) The persistence of defoaming is poor, and the defoaming performance usually only lasts for a few minutes, and it is necessary to continuously add defoaming, which will cause a cost burden on drilling production;
[0006] (4) Large dosage and heavy pollution, easy to produce condensation and scum phenomenon during use, resulting in mud pollution

Method used

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  • Silicone oil defoamer for drilling fluid and production process thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Preparation of a silicone oil defoamer for drilling fluid

[0024] (1) Accurately weigh each raw material component according to the formula: kerosene 110 kg, aluminum stearate 10 kg, emulsifier 10 kg, methyl silicone oil 5 kg, tributyl phosphate 10 kg, n-octanol 10 kg, water 5 kg kg, the emulsifier is at least one of SP-40 (Span-40), SP-60 (Span-60), SP-80 (Span-80) and T-60 (Tween-60) and / or the mixture of polyoxyethylene octylphenol ether (OP-10), weighed and placed in corresponding containers for use;

[0025] (2) Open the reactor and turn on the agitator, add the weighed kerosene and aluminum stearate into the reactor evenly and slowly, keep the temperature in the kettle at 30°C, and add the emulsifier slowly and evenly within 30 minutes In the kettle; start the heating process, after the temperature rises to 90°C, keep warm for 120 minutes, and keep stirring during the heating process to ensure that the materials are fully dissolved and mixed;

[...

Embodiment 2

[0028] Embodiment 2: the preparation of a kind of silicone oil defoamer for drilling fluid

[0029] (1) Accurately weigh each raw material component according to the formula: 120 kg of kerosene, 12 kg of aluminum stearate, 12 kg of emulsifier, 6 kg of methyl silicone oil, 13 kg of tributyl phosphate, 12 kg of n-octanol, 8 kg of water kg, the emulsifier is at least one of SP-40 (Span-40), SP-60 (Span-60), SP-80 (Span-80) and T-60 (Tween-60) and / or the mixture of polyoxyethylene octylphenol ether (OP-10), weighed and placed in corresponding containers for use;

[0030] (2) Open the reactor and turn on the agitator, add the weighed kerosene and aluminum stearate into the reactor evenly and slowly, keep the temperature in the kettle at 35°C, and add the emulsifier slowly and evenly within 35 minutes In the kettle; start the heating process, after the temperature rises to 95°C, keep warm for 130 minutes, and keep stirring during the heating process to ensure that the materials ar...

Embodiment 3

[0033] Embodiment 3: the preparation of a kind of silicone oil defoamer for drilling fluid

[0034] (1) Accurately weigh each raw material component according to the formula: kerosene 126 kg, aluminum stearate 14 kg, emulsifier 14 kg, methyl silicone oil 8 kg, tributyl phosphate 16 kg, n-octanol 14 kg, water 10 kg kg, the emulsifier is at least one of SP-40 (Span-40), SP-60 (Span-60), SP-80 (Span-80) and T-60 (Tween-60) and / or the mixture of polyoxyethylene octylphenol ether (OP-10), weighed and placed in corresponding containers for use;

[0035] (2) Open the reaction kettle and turn on the agitator, add the weighed kerosene into the reaction kettle evenly and slowly, keep the temperature in the kettle at 40°C, and slowly and evenly add the emulsifier into the kettle within 40 minutes; turn on the temperature rise During the process, after the temperature rises to 100°C, keep warm for 140 minutes, and keep stirring during the heating process to ensure that the materials are...

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Abstract

The invention provides a silicone oil defoamer for drilling fluid and a production process thereof. Kerosene is adopted as a solvent of aluminum stearate, so that solubility of aluminum stearate can be improved effectively; kerosene has excellent coagulation reducing effect, so that antifreezing coefficient of the defoamer can be remarkably improved, the defoamer still has high fluidity at low temperature of minus 20 DEG C, low-temperature defoaming performance of the defoamer is improved effect, and application occasions of the product are expanded; methyl silicon oil having excellent thermostability is introduced, so that thermostability of the defoamer can be improved effectively, the defoamer is small in evaporation loss at high temperature of 120 DEG C, and high-temperature defoamingperformance of the defoamer is improved effectively; excellent defoaming efficacy can be realized by only adding the defoamer accounting for 0.2-0.4% of volume of the drilling fluid; for fresh-water drilling fluid, 4% saline drilling fluid and saturated saline drilling fluid, density recovery rates of the defoamer can reach 95.4%, 97.6% and 98.5% respectively, and defoaming time is only 3.1min, 1.4min and 1.0min; the defoamer has potential industrial practical value.

Description

technical field [0001] The invention relates to the field of drilling fluid materials and its production process, in particular to a silicone oil defoamer for drilling fluid and its production process. Background technique [0002] During the drilling process of oil, natural gas and other energy mines, the gas in the formation can easily invade the drilling fluid and cause the drilling fluid to foam. At the same time, the surfactants, lubricants and other materials added to the drilling fluid may also cause drilling These foams can reduce the carrying capacity and specific gravity of drilling fluid for cuttings, causing accidents such as well wall collapse and pipe sticking. In response to this problem, the most commonly used method is to add defoamers to the drilling fluid to reduce the foam in the drilling fluid. At present, defoamers can be roughly divided into three categories: silicone type, polyether type and non-silicon type. Among them, silicone-based defoamers are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035
CPCC09K8/035
Inventor 段学容林瑞张宾
Owner YUMEN OIL FIELD KEDA CHEM
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