JPH05503955A - Use of selected ether emulsifiers in oil-based invert emulsions - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Choice L? : Kelmon to oil-based invert emulsion of ether-based emulsifier The present invention utilizes a W10 invert emulsifier of selected emulsifiers with high ecological compatibility. as well as the high ecological suitability of emulsions so stabilized. Drilling fluid characterized by compatibility and good stability and functional properties and it Concerning industrial use in base invert drilling muds. Importance of new drilling fluid system A common field of application is, for example, offshore drilling for the exploitation of oil and/or gas production.

The use of systems stabilized by emulsifiers according to the invention is particularly important in the marine sector. However, it is not limited to this. Important fields of use are subject to strict ecological supervision. This is an excavation in permafrost land where a survey is being conducted. However, the novel Drilling fluid systems are used in onshore drilling, e.g. geothermal drilling, oil/gas drilling, geological drilling and mining. Commonly used in industrial drilling.

Oil-based drilling fluids are so-called invert fluids, which consist of a three-phase system of oil, water, and solid particles. Commonly used in the form of slurry. These invert emulsified muds are W10 emulsion One type, that is, the water phase is distributed as a fine dispersion in the continuous oil phase. It is a formulation that has

In particular, emulsifiers or milks are added to stabilize the system as a whole and provide the desired functional properties. Contains additives, bulking agents, thickeners, flow loss additives, alkaline preservatives, viscosity modifiers, etc. A variety of additives are used. For related details, see e.g. ・Boyd (P, A, 'Boyd) et al.'s [Two Base Oil Used] ・In Raw Toxicity Oil-7 Soz (New Ba5e Oil U sed in Low-Toxicity○il Muds)j, Journal ・Of Petrol Technology eum Technology), 1985, pp. 137'142, and “Ninny Drilling” by Ruby Hennett (R, B, B ennett) ・Fluid Technology - Mineral Oil Mud (New Drill ing F 1uid Technology-Mineral Oil Mu d),” Journal of Petroleum Technology, 1984, 975. 981, and the references cited therein.

The stability and function of such invert emulsion in practical use are confirmed by the W10 used. It depends to a large extent on the emulsifier or rather on the corresponding emulsifier system. These emulsifiers It is expected that various requirements will be met.

These emulsifiers can maintain the quality of emulsions not only at room temperature but also at high temperatures, which are common. It must guarantee stability. Often overweight or relatively heavy Adding other bulking inorganic materials with high concentrations to the drilling fluid. Emulsifiers are these inorganic raw materials for bulking. It is also possible to improve the oil wettability of materials. Finally, the specific emulsifier used was Deposited on the valve wall to prevent penetration of oil, water and/or W10 emulsion Known to affect filter cake sealing.

In practical use, the oil used, i.e. diesel oil with low aromatic content or mineral Different emulsifier systems are used depending on the oil. Alkylbenzene sulfonates, fatty acids or fatty acid salts and aminoamides and imidacillins are particularly frequently used.

Emulsifier systems such as these are described, for example, in U.S. Pat. No. 4,374,737 and cited therein. It is described in the literature used. aminoamide and/or imidacillin Nitrogen-containing emulsifier systems are of particular importance in current practice. These emulsifiers are mentioned above. Although very effective with respect to the technical requirements of It is becoming more popular. These compounds are particularly important to aquatic organisms due to their amine content. has a relatively high toxicity to Due to the increasing demand for environmental compatibility in excavation, these compounds are becoming increasingly undesirable.

Problems to be solved by the present invention and their technical solutions The problems to be solved by the present invention are: Nitrogen-free and at the same time high ecological compatibility, especially for vulnerable marine systems. The object of the present invention is to provide an emulsifier or an emulsifier system that exhibits high compatibility. Also at the same time , the technical requirements are met at least to the current level by using a new emulsifier. It is to let

Another problem that the present invention seeks to solve is to provide a novel emulsifier that is compatible with the ecosystem. Further optimization of emulsifiers or emulsifier systems when used in conjunction with a compatible oil phase The objective is to provide a system that increases the Particularly in this aspect, the invention provides that the applicant This paper takes up the previous proposal regarding the characteristics of the continuous oil phase in invert drilling fluids. , discussed in more detail below.

Accordingly, in a first aspect, the present invention provides a lower polyhydric alcohol and at least 8 carbon atoms. -6 alcohols containing elementary atoms and/or partial esters with alkoxylates thereof on the use of ether as a nitrogen-free emulsifier in oil-based invert emulsions. do.

The present invention surprisingly provides that selected specific types of oil-soluble partial ethers are have different requirements regarding the functionality of emulsifiers or emulsifier systems for the mentioned fields of application. Based on the observation that it is a suitable replacement for the most effective known nitrogen-containing emulsifiers. Attached.

In another aspect, the present invention provides a continuous oil phase containing a dispersed aqueous phase and another Typical additives such as emulsifiers, fillers, thickeners, flow loss additives and alkaline Contains preservatives and is based on partial ethers of selected lower polyhydric alcohols Compounds of the aforementioned type can be used as nitrogen-free W10 emulsifiers in small amounts (and even partially). This invention relates to an invert drilling fluid characterized by: In the present invention, nitrogen-free partial ether is at least the main component of the emulsifier present in the invert drilling fluid. be used in nitrogen-free conditions, even if additional emulsifier components are present. It is preferable. Additionally, known nitrogen-containing emulsifiers can be combined with selected nitrogen-free partial ethers. May be used together.

Again, the selected partial ether is used as an emulsifier for the invert drilling fluid. At least the main component of

In a preferred embodiment, the emulsifier is present in a continuous oil phase, in which both components are preferred. Or at least an invert drilling fluid whose main component is oil with high ecological compatibility. Use it. Preferred oil phases are ester oils, oil-soluble acetic acid, etc. of the types described below. alcohol and/or oil-soluble ether.

The new nitrogen-free emulsifiers contain especially 2 to 6 carbon atoms and 2 to 6, preferably 2 to 6 carbon atoms. It is a partial ether of a polyhydric alcohol having 4 hydroxyl groups. ethylene glyfur , propane-1,2-diol, furopane-1,3-diol, trimethylol Corresponding partial agents of propane, glycerin and/or pentaerythritol Tell is especially suitable. In the present invention, glycerol partial ethers of the type described are used in small amounts. Of particular interest are emulsifier systems that partially contain

The -6 alcohol used for partial etherification of the hydroxyl groups of lower polyhydric alcohols is or a corresponding oil containing at least 8 carbon atoms It is derived from soluble-hydric alcohols. 8 to 36 carbon atoms, preferably Straight-chain and/or branched -6 alcohols containing 8 to 24 carbon atoms in the molecule is particularly suitable for partial etherification. -6 alcohol containing 10 to 18 carbon atoms This is particularly important. The alcohol itself may be aliphatic saturated and/or olefinic. It may be mono- and/or polyunsaturated.

In this respect, the corresponding alcohols of natural origin are of particular interest in the present invention.

Particularly important examples of this type of compounds are those derived from naturally occurring fatty acids or their derivatives. It is a so-called fatty alcohol obtained industrially by reduction. this kind of part Ethers exhibit high ecological compatibility even for particularly vulnerable marine systems. It is characterized by However, the present invention is not limited to these natural ingredients. .

Components with equivalent ecological compatibility may also be obtained synthetically.

In addition to or in place of the above-mentioned -6 alcohols, especially -hydric alcohols may be used. Alcohol alcohols of the type obtained by toquination and/or proboxylation Xylates can be used in the partial etherification of lower polyhydric alcohols. workman Toxilated derivatives are of particular interest as etherification components. This kind of alcoki 7 When fatty alcohols are used for etherification, on average up to 12 alkoxy Corresponding alkoxylates with a ru group, especially alkoxylated -6 alcohols Particular preference is given to the corresponding alcohol derivatives having on average up to 8 alkoxyl groups in Yes.

For reasons of both ecological compatibility and the necessary technical qualifications, glycerol-based partial -telling is important. Glycerin monoether is particularly effective in invert systems It was found that it is a typical emulsifier and stabilizer, but glycerin diether also has a role in the system. can be used at least partially. In the present invention, these groups Lycerine partial ether may be in a mixture with excess free glycerin. .

In other words, there is no need to separate excess glycerin left over from the production of ether. means.

Ethers of the aforementioned type having a flash point above 100°C, in particular above 120°C, Particularly suitable as emulsifier. This type of compound is an invert emulsion type Can be safely used in drilling fluids. These are usually in the form of multicomponent mixtures and invert It is present in an amount up to 10% by weight, preferably about 1-5% by weight of the drilling fluid.

General formula■: [R-○ (A l k -0), 2-, R'-(OH), -.

[wherein R is a straight chain and/or branched hydrocarbon group containing 8 to 36 carbon atoms, Preferably it represents a corresponding group containing 10 to 24 carbon atoms. Polyhydric alcohol basics If there are several etherifying groups in the molecule, the same substituents R or mixtures of different substituents R may be present. Monovalent acetate of natural origin In the case of alcohol-based ethers, there is generally a mixture of homologous alcohol residues. However, the amount of alcohol residues with different configurations and chain lengths in terms of the number of carbon atoms The distribution is determined by the method used to separate alcohol mini-products based on natural products. circle.

In the formula, Alk-0 represents a lower alkylene oxide unit, and represents ethylene oxide and and/or propylene oxide units are particularly preferred, and ethylene oxide units are particularly preferred. is important.

In the formula, n is a number from 0 to 12, preferably takes a value from 0 to 8.

In the formula, y indicates the number of hydroxyl groups in the lower polyhydric alcohol R'-(OH) used. . Within the definition according to the invention, y is preferably a number from 2 to 6, more preferably y is a number from 2 to 4; in the case of glycerin, y has a value of 3.

where X is a natural number or a fraction, preferably having a value of at least 1. X is Always smaller than y. This is due to the lower polyhydric alkali initially introduced in the present invention. Part of the call is due to the need to use ether. Preferred partial ether X The value of is 1 and/or 2. However, in this case, by known methods, low The equilibrium between free hydroxyl groups and etherified hydroxyl groups of polyhydric alcohols is Compounds of the general formula Bring to a state where it becomes a soluble compound.

Finally, R° in the formula especially comprises 2 to 6, preferably 2 to 4 carbon atoms, This shows the residues other than the hydroxyl group of the lower polyhydric alcohol. Ko A lipophilic ether with limited solubility in water of at most 0, represented by are particularly suitable for the purposes of the present invention.

The ether used as an emulsifier in the present invention can be used under standard etherification conditions. It can be manufactured by a method known in the art. There are two particularly suitable methods. to the first aspect In this case, general formula 1b.

R-0-(Alk-0), 1-H, where R, Alk-0 and n are the above ] is the same as sulfate by known methods. do.

The sulfate formed is then reacted with a polyhydric lower alcohol in a known manner, A partial ether of general formula I is formed.

Instead of alcohols of general formula Ib, corresponding halogenated compounds, especially The corresponding chloride is reacted with a lower polyhydric alcohol by known methods to give the general formula I It is also possible to form an ether represented by

In order to produce partial ethers of lower polyhydric alcohols, including monoethers, e.g. or if a reaction mixture containing predominantly monoethers is desired, the preferred In some embodiments, the reaction components are used in 1 molar excess, and can also be used in multiple molar excesses. can. For the purposes of this invention, in addition to the partial ethers formed, free polyhydric lower alkaline The reaction mixture containing coal can also be used directly in layered invert emulsions. stomach. However, if desired, the unreacted portion of the polyhydric alcohol may be at least partially reacted. may be separated from the reaction mixture. First mentioned, using alcohol sulfate Another point of particular importance in the etherification process is that during the etherification reaction, the The resulting sulfate salts, especially the corresponding sodium salts, remain in the reaction product. Therefore, the emulsifier according to the invention can be used on an industrial scale. This provides an inexpensive way to use it.

As already mentioned, the partially ether-based emulsifier according to the invention can be used in an oil-based The oil phase in the drilling fluid is selected as desired. Therefore, the current Diesel oil fraction, which is still widely used in large quantities, and carbonization with low aromatic content. A corresponding fraction of hydrogen compounds is suitable as the continuous oil phase.

In order to solve the problem of providing drilling fluids with improved ecological compatibility, In order to provide a scientifically acceptable drilling fluid, the present invention has been developed as described in a number of applicants' prior applications. It is proposed to use selected oil phases of the type listed above. Therefore, the scope of the teachings of the present invention The first type of oil component that is particularly important is esters, which are ecologically compatible. oil, particularly in earlier applications P3842659.5 and P3842703.6 by the applicant. , P3907391.2 and P3907392.0. this The disclosures of these applications are hereby incorporated into the disclosure of the present invention.

It is best if the pressure does not exceed 40mPa5.

However, in combination with or instead of this type of ester oil, e.g. Selected oil solubles of the type described in P3911238.1 and P3911299.3 Alcohols or selected oil-soluble ethers may also be used as base oils in invert drilling fluids. Appropriate. The disclosures of these applications are also included in the disclosure of the present invention.

In a preferred embodiment, all invert drilling fluids of the type according to the invention are provided in a continuous phase. plastic viscosity in the range of about 10 to 60 caPas, regardless of the particular characteristics of the oil phase. (pv) and a yield point (YP) ranging from about 24 to 190 dPa. these Both were measured at 50°C. Furthermore, we use oils that are ecologically compatible. When used in the continuous phase, ester oils, preferably monocarboxylic acids and monohydric and / or ester oils with dihydric alcohols are compatible with these ecosystems. preferably at least about one-third, more preferably the main component. .

The oil phase of the invert mud is similar to that of Brookfield (B) in the temperature range of 0-5℃ rookr 1eld) CRV T: Viscosity is 3Q mPa5 or less, Favorite sushi Q ++l l’l Ik/kkl ancient god sushiri, A quantity tatami yashisu horizontal tatami The content of the dispersed water phase of the invert drilling fluid is 5 to 45% by weight % is good and about 10-25% by weight is preferred. salts, such as CaC1= and /or KCl type salts may be dissolved in the aqueous phase.

Other components of invert drilling fluid Other ingredients that may be suitable include invert drilling muds of the type using mineral oil as the continuous phase. Any of the typical components currently used for formulation and practical use may be used. distributed In addition to the aqueous phase, oil phase and emulsifiers, fillers, flow loss additives, and viscosity adjusters. Particular mention may be made of agents and alkaline preservatives.

Membranes that are virtually impermeable to liquids, specifically using hydrophobized lignite as flow loss additive A thick coating is formed on the valve wall in the form of . A suitable amount is, for example, about 1 5-20 lb/bbl or about 5-7% by weight.

In this type of drilling fluid, the viscosity modifier typically used is cationically modified fine particles. The amount of bentonite used is practically used to compensate for the pressure against the oil phase. It is typically used when May be added in adapted amounts. For example, the specific gravity of the drilling fluid can be increased by approximately 2 up to 5, preferably 1.3 to 1. It can be increased to a range of 6.

Typical compositional characteristics of invert drilling fluids, their test methods and measured parameters The method for confirming the data is described in many of the prior art documents cited at the beginning of the text. Details The details are readily available, for example in the specialized field [Manual of Drilling Files]. Reuse Technology (Manual of Drilling F Iui) ds Technology) J, NL B aro id), London, and Great Britain (GB). For more information, see Mad Testing Tools and Techniques. Mud Testing-Tools andTechn 1ques ) J and “Oil Mud Technology (Oil MudT echno logY)J.

These documents specifically address the so-called HT/HP test under standard conditions (125°C). It describes the characteristic quantitative values of invert drilling mud. High measured under standard conditions The amount of filtrate accumulated under high temperature and pressure is a value that determines the suitability of the emulsifier used. So Therefore, the preferred emulsifier in the present invention is in the lapel state (HT/TP, 125°C ), preferably up to 20 m1, preferably up to 12 m1, in the drilling mud below This shows the flow loss value at . 10m1 or less, for example in the range of 1 to 8a+1 values are particularly preferred.

Preparation of a number of partial esters according to the definition according to the invention and as stabilizers for drilling fluids Examples are given below for their use in There are two types of differences described below. Drilling fluids ■ and ■ were used.

Drilling fluid I (Ura with low aromatic content) Carrier oil (BP83HF) 170ml Organophilic bentonite 4g [Geltone, NL Valoid product Liaoophilic lignite] 4.5g [DuraLone, NL Valoid product] Water 62m 1 CaC1,・2H, 030g Emulsifier (see Table 1) 6g Stearic acid 3g Ca(OH)t 3. g Heavy soil 180g The following tests* were carried out to investigate the properties of these and other oil muds. RP13B (8th Edition) Standard Precision Testing Drill Standard Procedure Testing D rilling fluids)] viscosity is NL Baloid Fan (NL Measurements were made at 50'C using a Baroid Fann 35 viscometer. 1 The plastic viscosity, yield point, and gel strength were all measured after 0 seconds and 10 minutes.

The sample oil mud was subjected to a so-called roller-oak test to investigate the temperature effect on stability. Heat (aged) at 125°C for 16 hours in a small autoclave in a vacuum oven. . The viscosity at 50°C was then measured again.

For flow loss, HT/HP filter cell (Baloid HT/HP cell) No. 387) at 125°C.

Drilling fluid■ (Fatty acid ester based drilling fluid with an oil to water ratio of 90:10) Fatty acid ester ( Inbutyl oleate) 239 ml Organophilic bentonite 6 g [Omnigel, Milbark (Mi1park) products Co-emulsifier (see Table 2) 9g Organophilic lignite 20g [Turaton, NL Valoid product co H7028g CaCl, 2H, 012g Ca(OH), 4g Heavy soil 259g Emulsifier A 1105 g (12 moles) of glycerin and 1111 oOOI of hexanol were The mixture was introduced into a Scotch tank and purged with nitrogen three times. CI! /l. -8EO-fatty alcohol- (FA) Sulfate [F Ai compound) IIl composition: Saturated CI! FA 70~7 5% by weight: saturated C,4FA 24-30% by weight, saturated C1o and C+eFA remainder 2772 g (1 mol) of a 26.8% aqueous solution was added to a water pump at 90°C. Therefore, a vacuum of 15 mbar was applied to the reaction mixture, and the open book was removed. . Then, 844 g (1.1 mol) of NaO was added at 150'C, and hexanol was added. Distilled under reduced pressure with a water pump. The reaction mixture was then heated to 170°C, Stirred at that temperature for 8 hours, cooled to 90'C, washed twice with water and dried. . 780 g of the corresponding glycerin ether (hydroxy fi318) were obtained.

Example 2 Emulsifier B 45 kg (488.7 moles) of glycerin and 1 f of 50% sodium hydroxide solution in water f17. 2 kg (90 mol) was introduced into the reaction vessel under nitrogen atmosphere, and heated to 150'C. Water was removed. FA sodium sulfate (C,, FA 79-75%, CFA 24-30%, saturated C3° and C, F A balance) 26.1 kg (90 mol ) was introduced into compound a in two portions, and after complete removal of water, the reaction mixture was diluted with 17 Heated at 5°C. After 8 hours, the mixture was cooled to 90'C and then 20 kg Washed twice with water. After drying in vacuum, 18 kg (83%) of glycerine -Tel was obtained.

Analysis value: hydroxyl value 366, 3 Example 3 Emulsifier C 91.2 kg (848 mol) of 99.5% glycerin and NaOH berate 3 ．． 11 kg was introduced into a stirred tank under nitrogen atmosphere and heated at 150'C for 3 hours. , water was distilled off. 79.5% spray neutral CI.

Output 2 EOFA sodium sulfate (same FA mixture as in the example) 33.9 kg (70, 7 mol) was introduced into the glycerinolate in several portions at 1200c, and the water was distilled off again. I left. In order to remove any remaining traces of water, suction degassing was carried out at 130°C. Hula The SCO was purged with nitrogen and heated to 170°C. The reaction mixture was then heated at 170°C. was stirred for 6 hours. After cooling to 100 °C, the reaction mixture was washed twice with 2500 g of water. After clarification and filtration, 950 g of final product (hydroxyl number 407.6) was obtained.

Example 4 Emulsifier D Glyceri: 1553g (6 mol) and NaOH 40g (1 mol) in three batches The mixture was introduced into a flask and stirred at 150°C for 3 hours. Next (C+*t+JA sulfur in A Sodium acid (composition of FA mixture, Cl00-3% by weight; C, 48-58% by weight %; C,, 19-24% by weight; C159-12% by weight: C,, 11-14% by weight ) 344.5 g (1 mol) were added and the mixture was stirred at 175° C. for 30 minutes.

40 g (1 mol) of another N a OH and CIf/Ill sodium alkyl sulfate 344.5 g (1 mol) of aluminum was added at 175° C. with stirring. After cooling, The reaction mixture was washed twice with water and dried. 542g C+tz+g glycerin Ether (hydroxyl value 290) was obtained.

Example 5 Emulsifier E 2336 g (25.2 mol) of 99.5% glycerin and 50% sodium hydroxide 336 g (4.2 mol) of lithium was introduced into the reaction vessel under nitrogen atmosphere and heated at 175 °C. The mixture was heated for 2 hours, and water was distilled off. Then sodium acetylstearyl sulfate EC+s/+aFA sodium sulfate (FA mixture: C,, O ~ 3% by weight; C+s 45-55% by weight; C, 45-55% by weight) 11440g (4.2 mol) Introduce the glycerinolate in two portions at 75°C and stir the reaction mixture for 8 hours. did.

After cooling to too'c, the reaction mixture was washed twice with 3000 g of water and dried. 10 19 g of glycerin ether (hydroxyl value 282) was obtained.

Example 6 Emulsifier F In a three-necked flask, 138 g (1.5 mol) of glycerin and 50% hydroxyl 80 g (1 mol) of sodium chloride was heated at 150°C under a nitrogen atmosphere for 3 hours, Water was distilled off. C, ..., FA sodium sulfate (same FA mixture as in Example 1) 296.1g (1 mol) was added in 3 parts at 180°C, and Stir for hours. After cooling, the reaction mixture was washed twice with water and dried under vacuum. 16 3 g of solid material (hydroxyl number 299.5) was obtained.

Example 7 Emulsifier G 1380 g (15 moles) of 99.5% glycerin and 50% sodium hydroxide 400 g (5 mol) of silica was introduced into a three-necked flask under a nitrogen atmosphere, and the mixture was heated at 150°C. The mixture was heated for 3 hours and water was distilled off. A vacuum of 25-40 mbar was then applied for 1 hour. . 883.5 g (5 moles) of decyl chloride was added and the mixture was heated at 170°C for 8 hours. Heated. After cooling, the reaction mixture a was washed twice with 1.5 kg of water and dried. light yellow A slightly viscous liquid of 905 g was obtained. the product Distilled. Hydroxy value of distillate: 482° Using these emulsifiers, the above drilling fluid I and It was tested for

The results obtained are shown in Table 1 (Drilling Fluid I) and Table 2 (Drilling Fluid ■) below.

For comparison, a standard nitrogen-containing emulsifier was prepared as follows. 831 g of tall fat fatty acid was heated to 100° C. under a nitrogen atmosphere.

Next, 171 g of diethylenetriamine was carefully added and further added to 210"C. It was hot.

52 g of water was separated. The mixture was cooled to 80°C and 61.3 g of maleic anhydride was added. It was added in several portions. The temperature was not allowed to exceed 90°C during the addition. anhydrous male After the inic acid had finished reacting, the reaction mixture was heated at 210"C for 1 hour and g of water was distilled off.

Using this comparative emulsifier, "Drilling Fluid ■" was formulated and tested.

The results obtained are shown in Table 1.

Red (drilling fluid■) Emulsifier Plastic viscosity Yield point Gel strength HT/EIP flow 10 seconds 10 minutes Loss ( 125℃) (mPas) (dPa) (dPa) (ml) Before aging After aging Before aging Aging After: Before aging After aging A 26 30 45 60 10/1419/21 8. O B 25 22 72 81 3g/4334/40 4, OC2119101 414/1410/14 9.6D till 16 62 43 34/43 19/24 9. OE 25 22 48 66 1915829/67 10 ．． OF 20 18 72 5g 24/4824/29 9゜2G 21 1 7 67 58 3g/3443/43 13.0 comparison 21 24 38 5 3 14/1419/24 18.0 Emulsifier Plastic viscosity Yield point Gel strength H T/HP flow 10 seconds 10 minutes loss (125℃) (IllPas) (dPa) (dPa) (ml) Before aging After aging Before aging After aging Before aging After aging E 30 37 48 67 34/6229/43 1 2. OF 35 39 96 115 5g/8282/139 7.0 required Approx. book A new nitrogen-free emulsifier for use in oil-based invert emulsions is alcohol and m alcohols containing at least 8 carbon atoms and/or a partial ether with an alkoxylate, preferably a glycerin partial ether. be. These emulsifiers are suitable for non-contaminating extraction of subsurface deposits and are Water dispersed in an oil phase with customary additives such as emulsifiers, extenders, thickeners, Contains along with flow loss additives and alkaline preservatives etc., ecologically improved It is used to produce inverted drilling fluid.

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Claims (18)

[Claims] 1. lower polyhydric alcohols and monohydric alcohols containing at least 8 carbon atoms; oil-based invert emuls of partial ethers and/or their alkoxylates; Use as a nitrogen-free emulsifier in John. 2. Polyvalent having 2 to 6 carbon atoms and 2 to 6, preferably 2 to 4 hydroxyl groups Partial ethers of alcohols, especially ethylene glycol, propanediol, Methylolpropane, pentaerythritol and/or glycerin partial 2. Use according to claim 1, characterized in that the method uses a ether. 3. a lower polyhydric alcohol and up to 36, preferably 8 to 24, more preferably are linear and/or branched monohydric alcohols containing 10 to 18 carbon atoms and /or preferably has up to 12, more preferably up to 8 alkoxyl groups Claims characterized in that the partial ether is used with an alkoxylate thereof to Use according to paragraph 1 or 2. 4. Saturated and/or olefinically unsaturated monohydric alcohol residues of natural origin, especially partial ethers with residues of fatty alcohols and/or their ethoxylates 4. Use according to any one of claims 1 to 3, characterized in that: 5. Using glycerol monoethers and, if desired, diethers, may be in a mixture with an excess of free glycerin. 4. Use according to any of 4. 6. Contains an aqueous phase dispersed in a continuous oil phase, optionally with typical additives. Invert emulsions suitable for the development of ecological safety regarding biological events. 100°C or higher, preferably 120°C or higher in John-based drilling fluids. Any one of claims 1 to 5, characterized in that an ether having a flash point of Uses as described in. 7. In invert drilling fluids, nitrogen-free ether is at least as strong as the emulsifier used. As the main component, nitrogen-free systems are preferably used even if additional emulsifier components are present. Use according to any one of claims 1 to 6, characterized in that it is used. 8. Ether emulsifiers can be used in subsea drilling and/or in low temperature regions, especially in permafrost regions. The use according to any one of claims 1 to 7, characterized in that it is used for excavation of. 9. In an amount of up to about 10% by weight, preferably about 1-5% by weight of the invert mud. 9. According to any one of claims 1 to 8, characterized in that an amount of ether emulsifier is used. Use of. 10. Ether emulsifiers can be added to ecologically safe oil phases, especially ester oils, lipophilic alcohols, etc. Inks based on oil phases that are anaerobically degradable, such as alcohols and/or lipophilic ethers. The method according to any one of claims 1 to 9, characterized in that it is used in a Bart system. for. 11. Flow loss value in drilling fluid is large under standard conditions (HT/HP; 125℃) using an ether emulsifier of up to 20 ml, preferably at most 12 ml. Use according to any one of claims 1 to 10, characterized in that it is used. 12. General formula I: [RO(Alk-O)n]-xR'-(OH)y-x [wherein R is 8 to 36, Straight-chain and/or branched hydrocarbon groups preferably containing from 10 to 24 carbon atoms and Alk-O is a lower alkylene oxide unit, more preferably an ethylene oxide unit. oxide and/or propylene oxide units, n is 0 to 12, preferably is a number from 0 to 8, and x is a natural number or fraction greater than or equal to l but less than y. is a number, y is a number from 2 to 6, preferably from 2 to 4; R' is a number from 2 to 6, preferably from 2 to 4; Other than the hydroxyl groups of lower, especially water-miscible, polyhydric alcohols containing 4 carbon atoms Residues of are shown. ], the solubility in water is limited at most. According to any one of claims 1 to 11, characterized in that a lipophilic ether is used. Use of. 13. Suitable for ecologically safe exploitation of geological products, in the continuous phase oil phase. The water is dispersed in the water with typical other additives such as emulsifiers, fillers, thickeners, flow agents, etc. Contains together with loss additives and alkaline preservatives and contains at least lower polyhydric alcohols. with monohydric alcohols containing 8 carbon atoms and/or their alkoxylates including a partial ether that is at least partially oil-soluble as a W/O emulsifier; Characteristic invert drilling fluid. 14. Ester oils, lipophilic alcohols and and/or a corresponding ether according to claim 13. drilling fluid. 15. Plastic viscosity (P V) and a yield point (YP) in the range of about 24-190 dPa. The invert drilling fluid according to claim 13 or 14. 16. When an ecologically safe oil is used in the continuous oil phase, the ester oil characterized by being at least about one-third, preferably the major component, of the systemically safe oil. The invert drilling fluid according to any one of claims 13 to 15. 17. The content of dispersed water is about 5% to 45% by weight, preferably about 10% to 25% by weight. %, especially containing dissolved salts of the CaCl2 and/or KCl type. The invert drilling fluid according to any one of claims 13 to 16, wherein the invert drilling fluid has a characteristic. 18. The Brookfield (RVT) viscosity of the oil phase of invert mud is 0-5℃. is characterized in that it does not exceed 50 mPas, preferably does not exceed 40 mPas. The invert drilling fluid according to any one of claims 13 to 17.