Low fluorescent lubricating agent for drilling fluid and method for preparing low fluorescent lubricating agent
A lubricant and low-fluorescence technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as unfavorable industrial production, cumbersome preparation steps, complex polymerization process, etc., and improve environmental pollution problems and equipment conditions. Simple, easily biodegradable effect
Active Publication Date: 2013-04-03
河北华运鸿业化工有限公司
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The method has complicated polymerization process and complicated p
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Embodiment 1
[0018] First, put 70kg of waste oil, 10kg of natural fatty acid, 10kg of vegetable oil, 5kg of oleic acid, 3kg of dodecylbenzenesulfonic acid, and 2kg of polyvinyl alcohol into the reaction kettle; then raise the temperature to 40°C and stir for 2 hours before discharging .
Embodiment 2
[0020] First, accurately weigh 65kg of waste oil, 18kg of natural fatty acid, 12kg of vegetable oil, 2kg of oleic acid, 1.5kg of dodecylbenzenesulfonic acid, and 1.5kg of polyvinyl alcohol into the reactor; then heat up to 50°C and stir for 1 hour Discharge.
Embodiment 3
[0022] First, accurately weigh 40kg of waste oil, 30kg of natural fatty acid, 16kg of vegetable oil, 10kg of oleic acid, 1kg of dodecylbenzenesulfonic acid, and 3kg of polyvinyl alcohol into the reactor; then heat up to 60°C and stir for 1.5 hours before discharging .
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The invention discloses a low fluorescent lubricating agent for drilling fluid and a method for preparing the low fluorescent lubricating agent. The low fluorescent lubricating agent is prepared from the following materials by weight percent: 30%-70% of swill-cooked dirty oil, 10%-30% of natural fatty acid, 10%-30% of vegetable oil, 1%-10% of oleic acid, 1%-3% of dodecylbenzene sulfonic acid and 1%-3% of polyvinyl alcohol. The method for preparing the low fluorescent lubricating agent comprises the following steps: accurately weighing the materials in a ratio, then putting the materials into a reactor, heating to 40-60 DEG C and stirring for 1-2hours at constant temperature. The method is simple in polymerization process and is suitable for industrial production; the low fluorescent lubricating agent for the drilling fluid is high in performance cost ratio, small in dosage and excellent in lubricating performance, is suitable for various water-base mud systems; and the low fluorescent lubricating agent is fluorescent-free and pollution-free, does not interfere geological logging work, dose not foam, dose not stick sieves, dose not influence other drilling fluid performances and dose not increase viscosity and water loss.
Description
technical field [0001] The invention relates to a lubricant for drilling fluid prepared from waste oil and a preparation method thereof. Background technique [0002] In oil drilling and well completion operations, various frictions will inevitably occur when the drill bit drills in and out. Friction will lead to excessive torque of the drill bit, and even cause accidents such as well wall instability and drill sticking. In severe cases, it will fail to drill to the target layer or even lead to the scrapping of the well, resulting in huge economic losses. Therefore, it is often necessary to add lubricants to the drilling fluid during drilling to reduce frictional resistance during drilling, improve drilling speed and reduce downhole accidents. At present, lubricants for drilling fluids can be divided into two categories: liquid lubricants and solid lubricants according to their physical form. Among them, the main raw materials of liquid lubricants are mostly organic compou...
Claims
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Inventor 张占山张学良张学军
Owner 河北华运鸿业化工有限公司
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