CN104371674A - Drilling fluid lubricant prepared from waste plant oil and preparation method thereof - Google Patents
Drilling fluid lubricant prepared from waste plant oil and preparation method thereof Download PDFInfo
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
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Abstract
The invention provides a drilling fluid lubricant prepared from waste plant oil and a preparation method thereof. The lubricant is composed of the following raw materials in parts by weight: 70 to 80 parts of waste plant oil, 10 to 20 pats of lower alcohols, 1 to 5 parts of surfactant, and 1 to 5 parts of high temperature resistant processing agent. The preparation method comprises the following steps: step a, carrying out a pretreatment on raw materials: removing impurities from waste plant oil; step b, carrying out esterification conversion: adding lower alcohols and the waste plant oil preprocessed in step a into a reactor with/without a catalyst to carry out esterification reactions or ester exchange reactions, wherein the reaction temperature is 60 to 120 DEG C, and the reaction time is 3 to 8 hours; step c, refining and separating the reaction products: precipitating and separating the reaction products obtained in the step b, and then refining the reaction products to obtain a refined product; step d, carrying out performance improvement: adding the surfactant and the high temperature resistant processing agent so as to obtain a finished product.
Description
Technical field
The invention belongs to Oil-Gas Well Engineering technical field, be specifically related to a kind of waste vegetable oil lubricant for drilling fluid and preparation method thereof.
Background technology
Drilling well frictional resistance, also known as drilling friction resistance, refers to the friction resistance in drilling process between well drilling pipe column and the borehole wall, formed primarily of the axial friction of drill string and the friction torque of circumference.In drilling process, when creeping into diamond head, require drilling tool height rotating speed, the annular gap between drilling tool and the borehole wall is very little, is also like this during wire line core drilling.Because it is very large that drilling tool height rotating speed turns round the resistance produced.Particularly during directional drilling, because the sinuousness of well bore is comparatively large, during drilling, drilling tool often contacts with the borehole wall, and friction resistance strengthens, and easily forms keyway.When creeping into high density drilling fluid, because solid load is high, resistance to flow is large, and between drilling tool and mud cake, frictional resistance increases, and can have a strong impact on drill speed, and increase drilling cost, serious meeting causes the generation of lock of tool drilling.
Along with developing rapidly of petroleum industry, the difficulty of oil field prospecting and exploitation is increasing, and drilling technology becomes increasingly complex, and well track is more and more difficult to control.Especially the large scale application of orientation well, horizontal well drilling technology in recent years, make the contact area between drilling tool and the borehole wall increasing, the frictional resistance in drilling process increases larger.Affect orientation well, horizontal well drilling technique frictional resistance because have kind more than 10, but depend primarily on the contact area between drilling tool and the borehole wall.Therefore frictional resistance is reduced by two kinds of approach in drilling process.First, reduce the contact area between drilling tool and the borehole wall as far as possible; Secondly, the lubricity of drilling fluid is improved by adding proper lubrication agent.Obviously, the contact area reduced in orientation well and horizontal well between drilling tool and the borehole wall is impossible, and therefore adding lubricant for drilling fluid is one of effective way solving frictional resistance problem in orientation well, horizontal well drilling technique.
Lubricant for drilling fluid is except life-span of mainly improving drilling tool and working index thereof, and also should not affect the analysis and inspection of formation data, namely lubricant should have low Poison or unstressed configuration character.Therefore, the selection of lubricating base material should note the organic substance that as far as possible need not contain phenyl ring, and crude oil, especially last running, still debris getting, pitch etc., because of more containing fluorescent substance, also should lack use as far as possible.Select or develop lubricant and should consider priming cost problem, more will consider environment protection and reservoir protection problem.Utilizing oil prodution industry tankage to carry out fine chemistry industry synthesis is the developing direction of lubricant for drilling fluid.
At present conventional lubricant for drilling fluid of a great variety, is broadly divided into solid and the large class of liquid two.
1, solid lubricant
Main products: plastic pellet, glass pellet, graphite etc.
Advantage: transfer the sliding friction between drilling rod and the borehole wall to rolling resistance
Shortcoming: (1), by the restriction of granular size, is easily removed by solid control equipment;
(2) in the extruding of drilling rod or under patting, the possibility of destruction, distortion is had;
(3) cool the poor-performing of drilling tool, be not suitable for using under high speed conditions.
2, mineral oil lubricant
Main component: crude oil, diesel oil or white oil
Advantage: lubricity is better
, in production and use procedure, there is environmental pollution and potential safety hazard in shortcoming:, difficult degradation low containing aromatic hydrocarbons, flash-point.
3, tensio-active agent series lubricant agent
Main component: the aqueous solution of tensio-active agent
Advantage: form oil-in-water emulsion drilling fluid, reduces the surface tension of drilling fluid;
Shortcoming: (1) will coordinate oils product just can use;
(2) lubricity is poor;
(3), there is environmental pollution and potential safety hazard in difficult degradation.
Compared with mineral oil origin lubricant, vegetables oil lubricant for drilling fluid has good biodegradable performance, nontoxic, reproducible feature, simultaneously not by the impact of petroleum resources crisis, is again subject to the people's attention.At present, be widely used in outboard two stroke engine oil, chain saw oil, hydraulic efficiency oil, lubricating grease and metal working oil etc. at Systems in Certain Developed Countries vegetable oil type lubricant, its consumption is close to 10% ~ 15% of lubricant total amount.In the deviated directional drilling that Louisiana, United States is coastal, good result of use is achieved as lubricant.When coastal certain mouthful of well creeps into, blocked completely in the place's drill pipe sub of 91.44m well depth, when add a kind of be called nontoxic, the biodegradable lubricant of Lu-brikeen after, friction resistance drops to 2265kg by 33975kg, and smooth ground auger reaches 4358.64m finishing drilling.
Goal of the invention
The invention provides a kind of waste vegetable oil lubricant for drilling fluid, with discarded Vegetable oil lipoprotein for raw material, the alcohols less with relative molecular weight carries out the fatty acid ester that esterification or transesterification reaction generate long-chain.Obtained product, with other additive for drilling fluid compatibleness is good, temperature resistance ability is strong, oilness good, effectively can reduce the frictional resistance in drilling process and moment of torsion, the generation of the down-hole complex accident such as minimizing bit freezing; This product is not containing aromatic hydrocarbon and unsaturated double-bond simultaneously, and unstressed configuration, does not affect the admission of geologic information in drilling process; To biological nontoxic or low toxicity, environmentally safe.
Summary of the invention
The invention provides a kind of waste vegetable oil lubricant for drilling fluid that can significantly improve drilling fluid lubricating performance:
Comprise the raw material of following weight: waste vegetable oil 70 ~ 80, lower alcohol 10 ~ 20, tensio-active agent 1 ~ 5, high temperature resistance treatment agent 1 ~ 5.
Described waste vegetable oil lubricant for drilling fluid also comprises the catalyzer of 1 ~ 5 weight part.
Described waste vegetable oil comprises peanut oil, Oleum Cocois, soybean oil, rapeseed oil, Oleum Helianthi, Semen Maydis oil, plam oil, oleum lini, Viscotrol C, Oleum Gossypii semen, Rice pollard oil, sweet oil, sesame wet goods or its mixture.
Described lower alcohols is the alcohols of 1-6 carbon atom, the alcohols of a preferred 1-3 carbon atom, is selected from methyl alcohol, ethanol, propyl alcohol, Virahol or its mixture.
The present invention also provides the preparation method of lubricant for drilling fluid, comprises the following steps
(1) feed pretreatment step: the impurity in removing waste vegetable oil;
(2) esterification switch process: by esterification or transesterification reaction preparation, temperature of reaction is 60 ~ 120 DEG C, reaction times 3 ~ 8h;
(3) product purification and separating step: product after sedimentation, being separated, then through fractional distillation refining product;
(4) improvement in performance step: add tensio-active agent and the process of high temperature resistance treatment agent.
Described feed pretreatment step, removes impurity with centrifugal method.
Described esterification is:
Described transesterification reaction is:
Wherein RCOOH and C
3h
5(RCOO)
3for discarded plant main body of oil, R is preferably the alkyl of 8-20 carbon atom, R
1for the alkyl of 1-6 carbon atom, the alkyl of a preferred 1-3 carbon atom, temperature of reaction is 60 ~ 120 DEG C, and the reaction times is 3 ~ 8h.
Can catalyzer be added during esterification, be selected from: the vitriol oil, concentrated hydrochloric acid, p-methyl benzenesulfonic acid, sulfur oxychloride etc., preferred p-methyl benzenesulfonic acid.
Transesterification reaction can add catalyzer, and comprise basic catalyst and an acidic catalyst, wherein basic catalyst is selected from: KOH, NaOH, NaOCH
3, an acidic catalyst is selected from the vitriol oil, sulfonic acid, p-methyl benzenesulfonic acid or its mixture.
Purification step is by method purified products such as rectifying, and rectifying is that one utilizes backflow to make liquid
mixtureobtain high purity separation
distillationmethod is industrial most widely used liquid mixture lock out operation.
In order to improve the lubricity of lubricant for drilling fluid of the present invention, the present invention adds tensio-active agent in improvement in performance step.Tensio-active agent refers to have fixing hydrophilic and oleophilic
group, align in the surface energy of solution, and can make
surface tension forcethe material of remarkable decline.
tensio-active agentmolecular structure have amphipathic: one end is
hydrophilic radical, the other end is hydrophobic group; Hydrophilic radical is often the group of polarity, as carboxylic acid, sulfonic acid, sulfuric acid, amino or amido and salt thereof, may also be hydroxyl,
acid amidesbase, ehter bond etc.; And hydrophobic group is often nonpolar hydrocarbon chain, as 8 above hydrocarbon chains of carbon atom.
surface promoting agentbe divided into ionogenic surfactant and
nonionic surface active agentdeng; Negatively charged ion
tensio-active agentbe selected from: stearic acid,
sodium dodecylbenzene sulfonate;
cats productbe selected from quaternary ammonium compound;
zwitterionicsbe selected from Yelkin TTS, amino acid pattern,
trimethyl-glycinetype;
nonionogenic tensidebe selected from
lipid acidglyceryl ester, sorbitan fatty acid ester (
sapn), polysorbate (tween).
In order to improve the temperature resistance of lubricant for drilling fluid of the present invention, in improvement in performance step, add high temperature resistance treatment agent.Described high temperature resistance treatment agent is selected from sulphur methyl tannin (SMT), sulphur methyl tannin extract (SMK), sulfonated-pheno-formoldehyde resin (SMP), sulfonated lignite resin or its mixture.
Lubricant for drilling fluid of the present invention has the following advantages:
(1) temperature resistance >=130 DEG C, and high-temperature hot to roll rear blistering rate lower, stabilizing mud properties, dark in being applicable to, dark orientation well or horizontal well drilling;
(2) lubricating coefficient reduced rate >=80% in fresh-water drilling fluid, extreme boundary lubrication coefficient and sticking coefficient are all lower, and oilness is good, can reduce the drilling well frictional resistance and moment of torsion that use fresh-water drilling fluid;
(3) lubricating coefficient reduced rate >=75% in 4%NaCl drilling fluid, extreme boundary lubrication coefficient and sticking coefficient are all lower, and oilness is good, can reduce the drilling well frictional resistance and moment of torsion that use salt-water drilling fluid;
(4) the toxic limit medium dose EC50 >=50000mg/L of 96h photogenic bacterium, according to drilling liquid toxicity grade scale, belongs to nontoxic, is conducive to environment protection;
(5) fluorescence grade≤5 grade, for admission no impact of the geologic information in drilling process;
This product both can be used alone, also can to replace or used in combination with mineral oil, diesel oil, have broad application prospects, good economic and social benefit, the cost of waste vegetable oil only has about 6000 yuan/ton, the cost of mineral oil 8000 ~ 9000 yuan/ton, raw materials cost has decreased 2000 ~ 3000 yuan/ton.And plant oil flash is than diesel oil, mineral innage, made lubricant lubricity is excellent, good with other treatment agent compatibleness, is that one is more efficient, safety, economic New drilling fluid lubricant.
Embodiment
The embodiment of form by the following examples, is described in further detail foregoing of the present invention.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following examples, unless otherwise indicated, raw materials usedly be this area common used material.
Embodiment 1: the preparation method of vegetables oil lubricant for drilling fluid of the present invention
(1) after waste vegetable oil sedimentation 24h, centrifuge 0.5h is used, to remove the impurity such as silt and moisture wherein;
(2) get the waste vegetable oil 800.0g of centrifugal mistake, add 100.0g methyl alcohol and catalyzer p-methyl benzenesulfonic acid 25.0g, keep temperature to be 90 DEG C, reaction 6h;
(3) after product sedimentation 6h, after isolating glycerine, then carry out rectifying at 100 DEG C, remove unreacted methyl alcohol;
(4) add 40g nonionogenic tenside lipid acid sorbyl alcohol (
sapn85) and 30g sulfonated lignite plastic resin treatment, to obtain final product.
Embodiment 2: the lubricity measuring method of vegetables oil lubricant for drilling fluid of the present invention
The preparation of fresh water-based slurry: get 300mL distilled water by graduated cylinder correct amount, under 10000RPM high-speed stirring, add the 18.00g sodium bentonite accurately taken, after high-speed stirring 20min, the airtight standing maintenance 24h of room temperature, is mixed with 6% sodium bentonite slurry, is called for short base slurry.
The preparation of 4% brine mud: get 300mL base slurry, add 12.00gNaCl, high-speed stirring 5min under 10000RPM, make 4% salt slurries, be called for short 4% brine mud.
Embodiment 2-1: lubricity testing method under normal temperature
The mensuration of fresh water slurry extreme boundary lubrication performance: prepare two parts of 300mL base slurries, the a vegetables oil lubricant for drilling fluid adding 1% development wherein, two parts of slurries all after high-speed stirring 5min, measure the extreme boundary lubrication coefficient before and after base slurry application of sample with EP extreme boundary lubrication instrument under 10000RPM.
The mensuration of fresh water slurry sticking coefficient: prepare two parts of 300mL base slurries, the a vegetables oil lubricant for drilling fluid adding 1% development wherein, two parts of slurries all after high-speed stirring 5min, measure the sticking coefficient before and after base slurry application of sample with sticking coefficient determinator under 10000RPM.
The mensuration of salt slurries extreme boundary lubrication performance: prepare two parts of 300mL brine muds, the a vegetables oil lubricant for drilling fluid adding 1% development wherein, two parts of slurries all after high-speed stirring 5min, then measure the extreme boundary lubrication coefficient before and after brine mud application of sample with EP extreme boundary lubrication instrument under 10000RPM.
The mensuration of salt slurries sticking coefficient: prepare two parts of 300mL brine muds, the a vegetables oil lubricant for drilling fluid adding 1% development wherein, two parts of slurries all after high-speed stirring 5min, then measure the sticking coefficient before and after brine mud application of sample with sticking coefficient determinator under 10000RPM.
Embodiment 2-2: lubricity testing method under high temperature
The mensuration of fresh water slurry extreme boundary lubrication performance: prepare two parts of 300mL base slurries, the a vegetables oil lubricant for drilling fluid adding 1% development wherein, two parts of slurries all after high-speed stirring 5min, are poured into respectively in digestion tank under 10000RPM, roll after 16h at 130 DEG C, cool to room temperature; Pour out, under 10000RPM after high-speed stirring 5min, with EP extreme boundary lubrication instrument measure respectively aging after base slurry application of sample before and after extreme boundary lubrication coefficient.
The mensuration of fresh water slurry sticking coefficient: prepare two parts of 300mL base slurries, the a vegetables oil lubricant for drilling fluid adding 1% development wherein, two parts of slurries all after high-speed stirring 5min, are poured into respectively in digestion tank under 10000RPM, roll after 16h at 130 DEG C, cool to room temperature; Pour out, under 10000RPM after high-speed stirring 5min, with sticking coefficient determinator measure respectively aging after base slurry application of sample before and after sticking coefficient.
The mensuration of 4% salt slurries extreme boundary lubrication performance: prepare two parts of 300mL brine muds, the a vegetables oil lubricant for drilling fluid adding 1% development wherein, two parts of slurries all after high-speed stirring 5min, are poured into respectively in digestion tank under 10000RPM, roll after 16h at 130 DEG C, cool to room temperature; Pour out, under 10000RPM after high-speed stirring 5min, with EP extreme boundary lubrication instrument measure respectively aging after brine mud application of sample before and after extreme boundary lubrication coefficient.
The mensuration of 4% salt slurries sticking coefficient: prepare two parts of 300mL brine muds, the a vegetables oil lubricant for drilling fluid adding 1% development wherein, two parts of slurries all after high-speed stirring 5min, are poured into respectively in digestion tank under 10000RPM, roll after 16h at 130 DEG C, cool to room temperature; Pour out, under 10000RPM after high-speed stirring 5min, with sticking coefficient instrument measure respectively aging after brine mud application of sample before and after sticking coefficient.
Be calculated as follows its extreme boundary lubrication coefficient or sticking coefficient reduced rate:
Wherein: K
f---the extreme boundary lubrication coefficient of base slurry or salt slurries or sticking coefficient;
---add extreme boundary lubrication coefficient or the sticking coefficient of drilling fluid after vegetable oil lubricating agent;
△ K
f---the extreme boundary lubrication coefficient of drilling fluid or sticking coefficient reduced rate.
Embodiment 2-3: additive for drilling fluid and system bio-toxicity (EC
50) testing method
The selection of standard luminescent bacterial classification: take out the ampere bottle containing 0.5g photogenic bacterium lyophilized powder and 2% sodium chloride solution from 2 ~ 5 DEG C of refrigerators, dropping into is equipped with in the small size vacuum flask of ice cube, inject in the lyophilized powder ampere bottle of opening with 2% sodium-chlor that 1ml syringe draws 1ml cold, must fully mix.After 2 minutes, bacterial classification luminescence (can check in darkroom, the visible low-light of naked eyes) of namely recovering is for subsequent use.Choose the standard luminescent bacterial classification of initial luminous amount between 800 ~ 1900mV, the vacuum flask put into ice cube is for subsequent use;
The preparation of test solution to be measured: add the vegetable oil lubricating agent of 1.0% in base slurry, under 10000RPM after high-speed stirring 5min, deal with agent solution for subsequent use;
Treatment agent solution is fully mixed 30min with 3.0%NaCl solution by 1:9 volume ratio, leave standstill 60min, get middle level suspension as test solution to be measured, according to said method circulating is diluted to different concns (1000mg/L, 10000mg/L, 100000mg/L, 1000000mg/L) by test solution;
The mensuration of test solution to be measured: accurately pipette the test solution to be measured of 5.0mL different concns in testing tube, then accurately draws 10 μ L recovery bacterium liquid with 10 μ L microsyringes, adds each pipe one by one, cover bottle stopper, put upside down 5 times with hand, put back to original position, often pipe adds bacterium liquid and is not shorter than 30 seconds interval time.At 20 ~ 25 DEG C, in 30 minutes, test the luminous intensity of 3.0%NaCl solution Duplicate Samples and different concns test solution to be measured respectively with parameter in bio kinetic model instrument.
The calculating of the relative rediance of institute's test fluid: institute's test fluid is relative to the luminous intensity of 3.0%NaCl solution, and calculation formula is as follows:
in the experimental liquid of serial dilution, if occur, relative luminosity factor is 50%, and this concentration is the EC of this mud
50value; If do not occur, relative luminosity factor is 50%, then with relatively near this value concentration for foundation, vertically explore the test solution concentration that relative luminosity factor is 50%.
Table 1 mud bio-toxicity grade scale
| Testing method | Severe toxicity | Highly | Moderate toxicity | Micro-poison | Actual nontoxic | Suggestion emission limit set standard |
| Photogenic bacterium EC 50 | <1 | 1-100 | 100-1000 | 1000-10000 | >10000 | >30000 |
Embodiment 2-4: the mensuration of fluorescence grade
Get a clean qualitative filter paper without greasy dirt, by unsettled for its level, drip upper 1 or 2 testing samples, then 1 to 2 carbon tetrachloride solvent is dripped again at a sample place, after the volatilization of solvent tetracol phenixin, filter paper is placed in petroleum geology fluorometric investigation instrument, under 365 ± 10nm UV-light, observes the color of fluorescence, brightness, then drip according to rank according to the regulation divide fluorescence of following table 2.
Table 2 fluorescence drips according to dividing rank
Embodiment 2-5:
New vegetable oil lubricant for drilling fluid of the present invention lubricant effect at normal temperatures
Table 3 new vegetable oil lubricant for drilling fluid lubricity at normal temperatures
Novel plant oil lubricant is extreme boundary lubrication coefficient reduced rate 85.5% ~ 88.6% at normal temperatures, sticking coefficient reduced rate 80.0% ~ 86.7%; Fluorescence grade 3 grades; EC
50>=50000mg/L.
Embodiment 2-6:
Novel plant oil lubricant lubricant effect under 130 DEG C/16h high temperature
Vegetable oil lubricating agent Evaluation results under table 3 high temperature
Novel plant oil lubricant is extreme boundary lubrication coefficient reduced rate 91.7% ~ 95.2% under 130 DEG C/16h high temperature, and sticking coefficient reduced rate is 92.3 ~ 92.9%; Fluorescence grade 3 grades; EC
50>=50000mg/L.
Embodiment 3: the using method of vegetables oil lubricant for drilling fluid of the present invention
Vegetables oil lubricant for drilling fluid is directly joined in drilling fluid, makes its concentration be 0.1 ~ 1%.
Claims (9)
1. a lubricant for drilling fluid, is characterized in that the raw material comprising following weight:
Waste vegetable oil 70 ~ 80, lower alcohols 10 ~ 20, tensio-active agent 1 ~ 5, high temperature resistance treatment agent 1 ~ 5.
2. a kind of lubricant for drilling fluid as claimed in claim 1, is characterized in that described raw material also comprises the catalyzer of 1 ~ 5 weight part.
3. a kind of lubricant for drilling fluid as claimed in claim 1, is characterized in that described waste vegetable oil is discarded peanut oil, Oleum Cocois, soybean oil, rapeseed oil, sunflower oil, Semen Maydis oil, plam oil, Oleum Cocois, Viscotrol C, cotton oil, Thistle oil and composition thereof.
4. a kind of lubricant for drilling fluid as claimed in claim 1, is characterized in that described lower alcohols is the alcohols of 1-6 carbon atom.
5. a kind of lubricant for drilling fluid as described in claim 1 or 4, is characterized in that described lower alcohols is methyl alcohol, ethanol, propyl alcohol, Virahol or its mixture.
6. prepare the method for lubricant for drilling fluid with raw material according to claim 1, it is characterized in that, the method is carried out as follows:
A. raw materials pretreatment: get waste vegetable oil removing impurity;
B. esterification conversion: lower alcohols and the pretreated waste vegetable oil of a step are added or do not add catalyzer and is placed in reactor, carry out esterification or transesterification reaction, temperature of reaction is 60 ~ 120 DEG C, reaction times 3 ~ 8h;
C. product purification and separation: the product that b step is changed through esterification is first carried out sedimentation, separation, then carries out rectifying, obtain purified product;
D. improvement in performance: add tensio-active agent and high temperature resistance treatment agent, obtain product.
7. prepare the method for lubricant for drilling fluid as claimed in claim 6, it is characterized in that, in described feed pretreatment step, with centrifugal method removing impurity.
8. prepare the method for lubricant for drilling fluid as claimed in claim 7, it is characterized in that, in described esterification switch process, add catalyzer.
9. prepare the method for lubricant for drilling fluid as claimed in claim 8, it is characterized in that, in described esterification switch process, adding catalyzer is p-methyl benzenesulfonic acid.
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| CN105112028A (en) * | 2015-09-10 | 2015-12-02 | 安徽陆海石油助剂科技有限公司 | Liquid lubricant for drilling fluid |
| CN106244122A (en) * | 2016-07-28 | 2016-12-21 | 四川省贝特石油技术有限公司 | Microcapsule-type speed-raising anti-seize lubricant and preparation method |
| CN108165240A (en) * | 2017-12-29 | 2018-06-15 | 常州市阿曼特化工有限公司 | A kind of preparation method of lubricant for drilling fluid |
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| CN111484835A (en) * | 2020-04-23 | 2020-08-04 | 新疆塔里木油田建设工程有限责任公司 | Water-soluble oil-based drilling fluid lubricant and preparation method thereof |
| CN111826134A (en) * | 2019-04-19 | 2020-10-27 | 中石化石油工程技术服务有限公司 | Biomass fermentation broth lubricant for drilling fluid and preparation method thereof |
| CN112175591A (en) * | 2020-10-22 | 2021-01-05 | 库尔勒郑豫石油物资有限公司 | Efficient temperature-resistant salt-resistant lubricant for drilling fluid and production and detection methods thereof |
| US11124687B2 (en) | 2018-07-17 | 2021-09-21 | Saudi Arabian Oil Company | Synthesized lubricants for water-based drilling fluid systems |
| US11352545B2 (en) | 2020-08-12 | 2022-06-07 | Saudi Arabian Oil Company | Lost circulation material for reservoir section |
| US11407956B1 (en) | 2021-02-22 | 2022-08-09 | Saudi Arabian Oil Company | Lubricant formulation for multiple water-based muds |
| CN115895607A (en) * | 2022-09-01 | 2023-04-04 | 扬州润达油田化学剂有限公司 | Preparation method of environment-friendly closed-loop recycling solid lubricant for oilfield drilling |
| US11795362B1 (en) * | 2022-10-31 | 2023-10-24 | Halliburton Energy Services, Inc. | Sustainable solid lubricant for drilling fluid |
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| CN110685590A (en) * | 2019-09-30 | 2020-01-14 | 中国水利水电第九工程局有限公司 | Method for solving problem of drill jamming in drilling process of raise boring machine |
| RU2723826C1 (en) * | 2019-11-01 | 2020-06-17 | Ольга Владимировна Ружанская | Apparatus for extracting residual oil from oil beds |
| CN111484835A (en) * | 2020-04-23 | 2020-08-04 | 新疆塔里木油田建设工程有限责任公司 | Water-soluble oil-based drilling fluid lubricant and preparation method thereof |
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| CN112175591A (en) * | 2020-10-22 | 2021-01-05 | 库尔勒郑豫石油物资有限公司 | Efficient temperature-resistant salt-resistant lubricant for drilling fluid and production and detection methods thereof |
| US11407956B1 (en) | 2021-02-22 | 2022-08-09 | Saudi Arabian Oil Company | Lubricant formulation for multiple water-based muds |
| CN115895607A (en) * | 2022-09-01 | 2023-04-04 | 扬州润达油田化学剂有限公司 | Preparation method of environment-friendly closed-loop recycling solid lubricant for oilfield drilling |
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