Dual-protection organic lubricant for drilling fluids and preparation method thereof

Abstract

The invention discloses a dual-protection organic lubricant for drilling fluids and a preparation method thereof. The technical scheme is as follows: the dual-protection organic lubricant for drilling fluids is mainly prepared from the following raw materials in parts by weight: 40-70 parts of vegetable oil, 10-20 parts of ethylene glycol, 10-20 parts of triethanolamine, 2-8 parts of concentrated sulfuric acid and 2-8 parts of composite emulsifier. The mass concentration of the concentrated sulfuric acid is 98%; and the composite emulsifier is a mixture of an SP-80 emulsifier and an OP-10 emulsifier. The invention also discloses a preparation method of the dual-protection organic lubricant for drilling fluids. The dual-protection organic lubricant for drilling fluids can greatly enhance the lubricating property of the drilling fluid, has the advantages of extreme pressure resistance, sticking resistance, no environment pollution, no fluorescence and the like, is beneficial to protecting the reservoirs for oil and gas, is suitable for common demands for well drilling, and can satisfy the drilling lubricating requirements for deep wells, high-inclination wells and high and deep horizontal wells.

Description

technical field [0001] The invention relates to a lubricant and a preparation method thereof, belonging to the technical field of oilfield drilling lubricants, in particular to a double-guaranteed organic lubricant for drilling fluid and a preparation method thereof. Background technique [0002] With the increase of the world's energy demand and the development of drilling technology, the drilling and development of deep wells and ultra-deep wells will become an important direction for the development of the drilling industry in the future. All countries in the world regard drilling depth and speed as an important indicator of the level of drilling technology. During the drilling of deep wells, ultra-deep wells and horizontal wells, the lubricity is the primary consideration of the drilling fluid. During the rapid drilling process, an appropriate amount of lubricant must be added to the drilling fluid to reduce the torque of the drilling tool and improve the stability of th...

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Problems solved by technology

Solid lubricants will increase the solid phase content of the drilling fluid and have a greater impact on the rheology of the drilling fluid

The patent with the publication number CN102676127A discloses a preparation method of a low-fluorescence lubricant for drilling fluid, which is to put water in the reactor and heat it up to 50°C, then add sodium dodecylbenzenesulfonate, sodium abietate, Oleic acid and white oil are stirred and reacted at 45°C for 2 hours to fully mix the materials evenly to obtain a low-fluorescence lubricant for drilling fluid. The lubricant produced by this process has insufficient temperature resistance, and the product is prone to foam during use, which affects Drilling Fluid Density and Performance Testing

The patent with the publication number CN1944570A discloses a low-fluorescence lubricant for drilling fluid and its production method. 50-90 parts by weight of aviation kerosene and 15-75 parts by weight of industrial white oil are added to the reactor, and heated by a water jacket furnace to 70-90°C and stirred for 30-60 minutes, added 0.5-2.5 parts by weight of sulfur powder, stirred and continued to heat to 90-100°C, then added 3.5-8.5 parts by weight of oleic acid, stirred for 30-60 minutes, The temperature is lowered to 70-80°C, adding 3.5-8.5 parts by weight of polyoxyethylene ether and 0.5-2.5 parts by weight of SP-80 emulsifier, and stirring for 30-60 minutes to obtain a low-fluorescence lubricant for drilling fluid. The production process is complex, the cost of raw materials is high, the extreme pressure value of the product is low, and the use effect is poor in high-density, high-deep wells, and high-inclination wells

The patent with the publication number CN103013464A discloses a low-fluorescence lubricant for drilling fluid and its preparation method, which comprises 30wt%-70wt% of waste oil, 10wt%-30wt% of natural fatty acid, 10wt%-30wt% of vegetable oil, and 1wt% of oleic acid. -10wt%, dodecylbenzenesulfonic acid 1wt%-3wt%, and polyvinyl alcohol 1wt%-3wt%, accurately weigh the materials according to the above weight ratio, then put them into the reaction kettle, and heat up to 40-60°C , Stir at constant temperature for 1-2 hours to prepare a low-fluorescence lubricant for drilling fluid. The waste oil used in this process is not stable enough, and the ratio of vegetable oil and lipid oil is not easy to control. It is easy to foam during use and has poor temperature resistance.