Modified polyanionic ammonium salt for drilling fluid and preparation method of modified polyanion ammonium salt
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A polyanion and drilling fluid technology, applied in the fields of petroleum drilling aids and fluid loss reducers for drilling fluids, to achieve outstanding anti-slump effect, reduced fluid loss and good anti-slump effect.
Active Publication Date: 2013-07-17
河北小钻科技有限公司
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The above technologies have no guiding significance on how to solve the problems of ultra-high temperature resistance, salt resistance and anti-slump performance of drilling fluid in deep well and ultra-deep well drilling, and keep the rheology of drilling fluid in a good state
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Embodiment 1
[0021] Embodiment 1: The modified polyanionic ammonium salt (i.e. fluid loss reducer) for drilling fluid of the present invention is made from the raw materials of the following weight ratio:
[0022] 120 kg of hydrolyzed polyacrylonitrile ammonium salt, 30 kg of epichlorohydrin, 300 kg of water, 60 kg of dodecyldimethylallyl ammonium chloride, 40 kg of acrylic acid, 2-acrylamido-2-methyl 60 kg of propanesulfonic acid, 40 kg of acrylamide, 0.3 kg of ammonium persulfate, and 0.2 kg of sodium sulfite.
[0023] The preparation method of the modified polyanion ammonium salt for drilling fluid comprises the following steps (sequentially): (1), weighing water, hydrolyzed polyacrylonitrile ammonium salt, epichlorohydrin, ten Dialkyl dimethyl allyl ammonium chloride, ammonium persulfate, and sodium sulfite are added to the stirred reactor, sealed, heated to 145-150°C (choose 145°C), and react for 2.5-3 hours (choose 3 hours), lower the temperature to below 60°C (55°C is optional); (2...
Embodiment 2
[0025] Embodiment 2: The modified polyanionic ammonium salt (i.e. fluid loss reducer) for drilling fluid of the present invention is made from the raw materials of the following weight ratio:
[0026] 80 kg of hydrolyzed polyacrylonitrile ammonium salt, 20 kg of epichlorohydrin, 300 kg of water, 30 kg of dodecyldimethylallyl ammonium chloride, 50 kg of acrylic acid, 2-acrylamido-2-methyl 40 kg of propanesulfonic acid, 20 kg of acrylamide, 0.1 kg of ammonium persulfate, and 0.1 kg of sodium sulfite.
[0027] Or it can be 120 kg of hydrolyzed polyacrylonitrile ammonium salt, 30 kg of epichlorohydrin, 500 kg of water, 70 kg of dodecyldimethylallyl ammonium chloride, 40 kg of acrylic acid, 2-acrylamido-2 - Methylpropanesulfonic acid 40 kg, acrylamide 50 kg, ammonium persulfate 1 kg, sodium sulfite 1 kg.
[0028] Or it can be 100 kg of hydrolyzed polyacrylonitrile ammonium salt, 10 kg of epichlorohydrin, 400 kg of water, 65 kg of dodecyldimethylallyl ammonium chloride, 10 kg of ac...
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Abstract
The invention discloses modified polyanionic ammonium salt for drilling fluid and a preparation method of the modified polyanionic ammonium salt. The ammonium salt is prepared from following materials of hydrolyzed polyacrylonitrile ammonium salt, epoxy chloropropane, water, dodecyl dimethyl allyl ammonium chloride, crylic acid, 2-acrylamide-2-methyl-propanesulfonic acid, acrylamide, ammonium persulfate and sodium sulfite. The preparation method comprises the following steps of: weighing water, hydrolyzed polyacrylonitrile ammonium salt, epoxy chloropropane, dodecyl dimethyl allyl ammonium chloride, ammonium persulfate and sodium sulfite; putting into a reaction kettle, sealing, heating, reacting and cooling; adding the weighed crylic acid, the 2-acrylamide-2-methyl-propanesulfonic acid and acrylamide to the cooled reaction kettle, stirring to completely dissolve, sealing and leading in nitrogen, heating and reacting under protection of the nitrogen; and discharging to obtain a product by vacuulizing and drying. The modified polyanionic ammonium salt can resist super-high temperature of 240 DEG C, resists statured salt water, compound saline water and seawater, can effectively reduce the filter loss of the drilling fluid, does not tackify, and is good in anti-collapse performance.
Description
technical field [0001] The invention relates to a fluid loss reducer for drilling fluid, which belongs to petroleum drilling additives, in particular to a modified polyanion ammonium salt for drilling fluid. The invention also relates to a preparation method of the modified polyanion ammonium salt for drilling fluid. Background technique [0002] At present, there is less and less shallow crude oil in the world, and the mining depth is getting deeper and deeper, but there is still a shortage of drilling aids for deep and ultra-deep wells. Some products currently on the market either can only resist high temperatures below 200°C, or are excessively viscosified, and other auxiliary materials need to be added to allow drilling to proceed normally. Seawater, a petroleum drilling aid that can effectively reduce the fluid loss of drilling fluid, does not increase viscosity, and has an outstanding anti-slump effect. CN102276773A discloses a double polyammonium salt for drilling f...
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