Anti-sloughing diluted filtration reducing agent for drilling fluid and preparation method thereof

A technology for reducing fluid loss and drilling fluid, which is applied in the field of oil drilling aids and fluid loss reducing agents for drilling fluids. , the effect of simplifying the production process

Active Publication Date: 2009-10-21
石家庄华莱鼎盛科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that the anti-slump perfor...

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  • Anti-sloughing diluted filtration reducing agent for drilling fluid and preparation method thereof

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Embodiment 1

[0051] Embodiment 1: The fluid loss control agent of the present invention is made from the raw materials of following weight ratio:

[0052] Lignite (or peat or weathered coal, that is, substances containing humic acid) 120 kg, sodium metabisulfite 30 kg, water 500 kg, hydrolyzed polyacrylonitrile ammonium salt 20 kg, cross-linking agent (formaldehyde) 5 kg, potassium hydroxide 30 kg kg, 5 kg of complexing agent (ferric chloride), 2 kg of urea, and 20 kg of silicone resin.

[0053] The preparation method of anti-slump dilution fluid loss reducer for drilling fluid, it (sequentially) comprises the following steps: (1), water, potassium hydroxide, lignite (or peat or weathered coal), sodium pyrosulfite are added and stirred according to the above weight In the reaction kettle, seal it, heat up to 160°C, react for 2 hours, and cool down to below 60°C (such as 55°C). This step improves the temperature resistance and viscosity-reducing function of the product by extracting humic a...

Embodiment 2

[0054] Embodiment 2: the fluid loss control agent of the present invention is made from the raw material of following weight ratio: weathered coal (or peat or lignite, namely the material containing humic acid) 110 kilograms (or 80 kilograms or 100 kilograms ), sodium metabisulfite 35 kg (or 55 kg or 80 kg), water 400 kg (or 300 kg or 450 kg), hydrolyzed polyacrylonitrile ammonium salt 20 kg (or 10 kg or 30 kg), crosslinking agent (formaldehyde) 5 kg (or 2 kg or 15 kg), 40 kg of potassium hydroxide (or 30 kg or 50 kg), 8 kg of complexing agent (ferric chloride) (or 5 kg or 20 kg), 5 kg of urea (or 1 kg or 10 kg), silicone resin 15 kg (or 10 kg or 20 kg).

[0055] The preparation method of the anti-slump dilution fluid loss reducer for drilling fluid comprises the following steps: (1), water, potassium hydroxide, lignite (or peat or weathered coal), and sodium pyrosulfite are added to the stirred reaction kettle according to the above weight medium, sealed, heated to 150°C (or...

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Abstract

The invention relates to an anti-sloughing diluted filtration reducing agent for drilling fluid and a preparation method thereof. The filtration reducing agent is prepared from the following raw materials by weight portion: 80 to 120 portions of substance containing humic acid, 30 to 80 portions of sodium metabisulfite, 300 to 500 portions of water, 10 to 30 portions of ammonium hydrolyzed polyacrylonitrile, 2 to 15 portions of cross linking agent, 30 to 50 portions of potassium hydroxide, 5 to 20 portions of complexing agent, 1 to 10 portions of urea and 10 to 20 portions of organic silicone resin. The preparation method comprises the following steps: weighting the water, the potassium hydroxide, lignite or peat or weathered coal and the sodium metabisulfite by weight portion, adding the materials into a stirred autoclave, sealing the stirred autoclave, raising the temperature, performing reaction and reducing the temperature; adding the ammonium hydrolyzed polyacrylonitrile, the cross linking agent, the complexing agent, the urea and the organic silicone resin by weight portion into the stirred autoclave after the temperature reduction, sealing the stirred autoclave, raising the temperature and stirring for reaction; and discharging, and performing spray drying on a product to obtain a finished product. The anti-sloughing diluted filtration reducing agent has good comprehensive performance, can prevent slough of mineshafts and reduce the filtration loss and viscosity of slurry, and is easy to realize safe production.

Description

technical field [0001] The invention relates to a fluid loss reducer for drilling fluid, which belongs to petroleum drilling aids, in particular to an anti-slump dilution filter loss reducer for drilling fluid. The invention also relates to a preparation method of the fluid loss control agent. Background technique [0002] In oil drilling operations, people in the industry often use bentonite and water to make drilling mud to facilitate the normal operation of drilling tools. In order to reduce the fluid loss and apparent viscosity of the drilling mud and prevent the well wall from collapsing under hydration, fluid loss reducers, viscosity reducers, anti-slump agents, etc. are usually added as drilling aids. Significantly reduce the fluid loss and apparent viscosity of drilling mud to strengthen the well wall. But there are also some weak points in the above products. One is that the product has a single function, such as ammonium salt, which only has the function of redu...

Claims

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Application Information

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IPC IPC(8): C09K8/03
Inventor 赵秀平张建锋
Owner 石家庄华莱鼎盛科技有限公司
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