The drilling fluid is oil-based |
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IPC classes for russian patent The drilling fluid is oil-based (RU 2208035):
 The drilling fluid is oil-based / 2208034
The invention relates to the drilling of oil and gas wells, particularly to washing liquids used in the completion and drilling of appraisal wells with coring with natural saturation
 The method of obtaining invert-emulsion solution / 2205855
The invention relates to the oil and gas industry, in particular hydrophobic emulsions used in the killing of wells before conducting underground repairs
 The multiphase lubricant concentrate for use in aqueous working fluids in the field of exploration by drilling / 2203921
The invention relates to lubricating means, which in the course of drilling is added to the corresponding drilling fluids.
 Liquid for killing wells / 2203304
The invention relates to the field of oil and gas, in particular compositions for killing the well, and can be used at the enterprises of the oil and gas industry underground and well workover
 The emulsifier for the preparation of invert emulsions / 2203130
The invention relates to emulsifiers, are able to form invert emulsions, which are used for enhanced recovery of oil
 The method of obtaining the emulsifier-stabilizer hydrophobic emulsion drilling fluids / 2201950
The invention relates to the field of chemicals used in drilling oil and gas wells, particularly to a process for the preparation of emulsifier-stabilizer, designed to obtain highly stable hydrophobic emulsion drilling fluids with high water content, which are used for drilling in mineral salts composition, unstable clayey rocks, at the opening of productive formations, killing Skagen
 Fluid for plugging and temporary abandonment of wells / 2201498
The invention relates to gazoneftedobyvayuschie industry, in particular to the killing and preservation of wells with abnormally low formation pressure
 Reagent for invert emulsion fluids / 2200753
The invention relates to the oil and gas industry, in particular to the invert emulsion fluids used in well construction, completion and workover
 Emulsifier invert emulsions / 2200056
The invention relates to emulsifiers invert emulsions and can be used to obtain a homogeneous mixture of two immiscible liquids such as oil and water, oil and water, etc. used in the oil and gas industry
 The reagent complex of actions for process fluids used in drilling and workover / 2199570
The invention relates to the field of chemical reagents comprehensive actions for process fluids used in drilling and workover
 Well completion and pullout composition / 2253664
Composition 61.0-68.9% petroleum or petroleum processing product, 2.0-4.7% natural fatty acid, 2.1-4.0% sodium hydroxide, and natural calcium carbonate with particle size 2 to 50 μm - the rest. Natural fatty acid employs vegetable and animal fat production waste.
Hydrophobic emulsion / 2257469
Hydrophobic emulsion designed as fluid for killing of oil and gas wells and as grouting mortar or water-insulation fluid contains 25.0-40.0% of degassed crude oil from Allakaevo oilfield and water (the rest).
Hydrocarbon-based drilling fluid / 2263701
Invention provides environmentally safe hydrocarbon-based drilling fluid suitable for use during boring and completion of oil and gas wells. Drilling fluid is characterized by required viscosity and structural properties within a wide water content range and, in particular, contains, wt %: castor oil 50.0-83.0, colophony calcium resinate (thickener) 4.0, calcium chloride 10.0, Neonol AF-9/12 (emulsifier) 0-0.3, organophilic bentonite 2.0-3.0, water 0-30.0, and penosoline (waterproofing agent) 0-20.
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The invention relates to the drilling of oil and gas wells, particularly to washing liquids used in the opening and the fracturing of the productive strata, for well killing with the repair, and appraisal wells with low formation pressure coring, with natural neftegazonosnosti. The technical result is to increase the stability of the drilling fluid at high temperatures and improved rheological characteristics. The drilling fluid is oil-based, including hydrocarbon-based, synthetic fatty acid, sodium hydroxide, weight and the amendment, as the amendment contains atactic polypropylene and paraffin in the following ratio of ingredients, wt.%: petroleum base 65-80, synthetic fatty acid of 0.7 to 2.8, sodium hydroxide 0,60-2,40, atactic polypropylene 1,4-5.0, paraffin 0,70-3.0, weighting the rest. table 2.
The invention relates to the drilling of oil and gas wells, particularly to washing liquids used in the opening and the fracturing of the productive strata, for well killing at overhaul, as well as drilling OC/p> A known solution oil-based lime-bitumen (Ryazanov, J. A., "Handbook of mud". - M.: Nedra", 1979, S. 54-59), consisting of diesel fuel, lime, barite, this highly oxidised bitumen, surfactants, oil and water.
The disadvantage of the above solution are costly, time-consuming operations associated with the heat when dissolved bitumen into diesel fuel. As practice shows, in the preparation of the above solution using this highly oxidised bitumen in the amount of 150 m3wells takes 10-12 days, 80% of the time is spent on the dissolution of the bitumen.
The closest solution is "Drilling fluid hydrocarbon-based" (and. C. 1263705, From 09 To 7/06, prototype), consisting of a hydrocarbon base, this highly oxidised bitumen, synthetic fatty carboxylic acid, polyorganosiloxanes and siloxanes, sodium hydroxide, bentonite filler.
The disadvantage of the above solution is that the process of obtaining mud hydrocarbon-based technologically inconvenient and time-consuming, in addition, uses complex equipment and toxic materials.
To correct read is perature and improve the rheological characteristics of the proposed drilling fluid is oil-based, including synthetic fatty acid, sodium hydroxide, weight and the amendment, which is where which are used as atactic polypropylene, and paraffin in the following ratio of ingredients, wt. %: Petroleum base - 65 - 80 Synthetic fatty acid is 0.7 - 2.8 sodium Hydroxide is 0.60 - 2.40 for Atactic polypropylene - 1,4 - 5.0 Paraffin - 0,70 - 3.0 Weight - the Rest of the Preparation of drilling fluids oil-based is as follows.
In a small amount of hydrocarbon bases, such as diesel fuel, preheated to a temperature of 60-70oC, dissolved synthetic fatty acid (hereinafter referred to as FLC) and paraffin, separately dissolved atactic polypropylene small amounts of a hydrocarbon substrate with a temperature of 60-70oC. then dissolved ingredients of the mud hydrocarbon-based injected into the remaining portion of the hydrocarbon framework that is pre-filled in the mixing device, stirred for 5-10 minutes Then the mixture was added sodium hydroxide aqueous solution of caustic soda, stirring while the whole composition. During the 10-minute mixing FFA react with hydroxide is to function effectively increasing the viscosity, ie appears logarithmic additivity viscosity, thixotropic properties. This allows to considerably reduce the consumption of atactic polypropylene and significantly affect the structural and mechanical properties of the solution. After this, the solution weight to the required density (specific gravity) of the weighting agent such as barite. The whole drilling fluid hydrocarbon-based stirred for another 10 minutes. Total cooking time is 40-50 minutes. Prepared drilling mud oil based leave for a day alone for "ripening", i.e. the full set of structural and rheological characteristics. Through the day make measurements of process parameters.
The example In 20-40 ml of diesel fuel, preheated to a temperature of 60-70oWith, separately dissolve 3 g (0,92%) FLC, 3 g (0,92%) paraffin and 6 g (1.84 per cent) atactic polypropylene. Then the dissolved ingredients of the mud oil based mixed with 258 ml of diesel fuel with a temperature of 20oWith all stirred for 5-10 minutes then the mixture was added 1.6 ml (0,74%) sodium hydroxide - 50%-aqueous solution of caustic soda for the saponification of FLC intensive stirring for 10 minutes the whole composition. As the mixture is injected 27 g (8,31%) Utagawa solution hydrocarbon-based, the effect of composition on the properties of the solution are given in table. 2.
As can be seen from the table. 1 and 2, the proposed drilling fluid hydrocarbon based at high temperatures exceeding 100oWith the amount of atactic polypropylene is less than 1.4 percent is unsatisfactory rheological characteristics: low viscosity, low structural-mechanical properties, high values of rate of filtration (over 10 cm3for 30 min), all this does not ensure the stability of the solution and leads to the precipitation of the filler and the decrease in the concentration of the wax is less than 0.7% results in poor process parameters: viscosity exceeds 150 C; high values of static and dynamic shear stress, which leads to an increase of the initial pressure wash well until technically impossible.
Introduction to solution the amount of atactic polypropylene is greater than 5% leads to a dramatic thickening of the solution at this viscosity exceeds the value 160 C (the optimal value of 50-150 s at a temperature of 15-20oC) in addition, increases the dynamic shear stress, which negatively affects the conditions of leaching wells, leads to increase in pressure is olivka well, and an increased concentration of paraffin than 3% results in solutions having viscosity values below 50, low structural-mechanical properties and a high degree of filtering up to 4 cm3over 30 minutes, This solution becomes sedimentation unstable at high temperatures exceeding 100oWith, stratified by density alone and not suitable for weighting.
Analysis of the known indications and effects of each of the components showed that the use of single or in arbitrary combinations not result in the expected effect of using the proposed drilling fluid hydrocarbon based at high temperatures exceeding 100oC.
It was established experimentally that the claimed composition of components, each of which potentiates the effect of the other, in the specified proportions achieving a synergistic effect, i.e., manifestations of logarithmic additivity viscosity, thixotropic properties. Thus, compared with the individual components of a mixture has new properties, leading to the above result.
Claims Mud on uglevodorov the amendment, characterized in that, as the amendment contains atactic polypropylene and paraffin in the following ratio of ingredients, wt.%:Petroleum base - 65-80 Synthetic fatty acid is 0.7 and-2.8 Sodium hydroxide is 0.60-2.40 a Atactic polypropylene - 1,4-5,0 Paraffin - 0,70-3,0 Weighting - Ostalnoe
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