CN104829781A - Water-based tackifying and shear strength improving agent for drilling fluids, and preparation method thereof - Google Patents
Water-based tackifying and shear strength improving agent for drilling fluids, and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the field of drilling fluids, and discloses a preparation method of a water-based tackifying and shear strength improving agent for drilling fluids. The method comprises the following steps: 1, dissolving an anionic monomer, a nonionic monomer and a cationic monomer in water under stirring, and mixing; 2, adjusting the pH value of a mixed solution obtained in step 1 to 5-10, and continuously stirring; and 3, adding an oxidizing agent, a reducing agent and an azo initiator into a mixture obtained in step 2, and reacting under stirring. The water-based tackifying and shear strength improving agent for drilling fluids has the advantages of excellent tackifying and shear strength improving performances, excellent temperature resistance and excellent system applicability, and the excellent tackifying and shear strength improving performances of the agent allow a drilling fluid system to have a high dynamic plastic ratio, the drilling fluid flow pattern to be well optimized, the dynamic shear force of the system to be improved and the cuttings carrying ability of the system to be enhanced.
Description
Technical field
The present invention relates to a kind of drilling fluid aqueous based tackifier to put forward the preparation method that cuts agent and carry according to a kind of drilling fluid aqueous based tackifier that this preparation method prepares and cut agent.
Background technology
Extended reach well have can on a large scale controlled oil-bearing area, improve the rate of oil and gas recovery, reduce the advantages such as oil-field development cost, there are significant economical, societal benefits, so one of extended reach well most effective means having become current marginal field development.Increasing in recent years along with large inclined shaft extended reach well drilling hole number, takes lithology to drilling fluid and has higher requirement.
Well cleaning effect is bad can increase drilling torque and frictional resistance, therefore extended reach well, large hole deviation, low discharge capacity, low return the condition of speed under, how to carry out landwaste in well timely and effectively, eliminate cutting bed, keeping well to clean, is that can extended reach well the key of smooth construction.Due to the raising to environmental requirement, and the tractable demand of low drilling cost and scene, make under the very not complicated prerequisite of geologic condition, extended reach well drilling operation adopts water base drilling fluid system as far as possible.Speed one timing is returned, adjustment drilling fluid flow pattern, the key selecting suitable rheological parameter to be hole cleaning at drilling fluid annular space.When annular space drilling fluid state is laminar flow, must drilling fluid rheology be adjusted, replace spike type laminar flow with plate laminar flow, thus improve the large rock-carrying ability of drilling fluid.If system ratio of dynamic shear force/yield value to plastic viscosity is too low, spike type laminar flow can be caused; As ratio of dynamic shear force/yield value to plastic viscosity is too high, often because the increase of yield value causes pump pressure significantly to raise, so suitably high ratio of dynamic shear force/yield value to plastic viscosity, make System forming plate laminar flow be conducive to experience and clean.No matter be turbulent flow or laminar flow, improve drilling fluid viscosity and can contribute to taking rock.Current domestic main application xanthan gum, modified-cellulose etc. improve drilling fluid thickening property, become and solve the important measures that landwaste removes problem.But consider from entirety, take lithology energy by thickening to improve drilling fluid, be not only not enough to question essence agree with mutually in principle, and also there is the low problem of the wasting of resources, the performance rate of exchange in practice.The thickening that performance is good is carried and is cut agent, face performance of can coordinating all quarters concerned on to greatest extent, the balance of coordinating all quarters concerned as much as possible between the performance of face, and makes drilling fluid obtain high ratio of dynamic shear force/yield value to plastic viscosity, and optimization system large rock-carrying ability, greatly reduces drilling failure, improves drilling efficiency.
Summary of the invention
The object of the invention is to overcome existing drilling fluid thickening and carry that to cut agent ratio of dynamic shear force/yield value to plastic viscosity not high enough, narrower and/or the imperfect shortcoming of temperature resistance stability of range of application, the preparation method providing a kind of drilling fluid aqueous based tackifier to carry to cut agent and carry according to the drilling fluid aqueous based tackifier that this preparation method prepares and cut agent, drilling fluid aqueous based tackifier of the present invention is carried and is cut agent and have excellent thickening and carry and cut performance, heat-resisting property and system suitability, the thickening of its excellence is carried and is cut performance and be embodied in: drilling fluid system can be made to obtain higher ratio of dynamic shear force/yield value to plastic viscosity, OPTIMIZATION OF DRILLING FLUID flow pattern well, raising system yield value, enhancing system large rock-carrying ability.
The present inventor finds, by especially adding azo initiator in the mixture regulated after pH, and regulate the proportioning of each material and control reaction conditions, preparation-obtained drilling fluid thickening can be made to carry and to cut the above-mentioned performance that agent has excellence, its principle is speculated as: azo initiator can the effect of inhibited oxidation reduction initiating system to a certain extent, reaction is stablized more gently, is conducive to obtaining reacting product that is even, stable performance.
The invention provides a kind of drilling fluid aqueous based tackifier and put forward the preparation method cutting agent, the method comprises the following steps:
(1) under agitation, anionic monomer, nonionic monomers and cationic monomer dissolved in water and mix;
(2) by step (1) gained mixed solution adjust ph to 5-10, and continue stir;
(3) in step (2) gained mixture, add azo initiator, reductive agent and oxygenant, and under agitation react.
Present invention also offers a kind of drilling fluid aqueous based tackifier that method according to the present invention prepares to carry and cut agent.
Drilling fluid aqueous based tackifier of the present invention is carried and is cut agent main advantage compared with prior art and be:
(1) drilling fluid aqueous based tackifier of the present invention carry cut agent can under certain thickening degree, make drilling fluid system obtain higher ratio of dynamic shear force/yield value to plastic viscosity;
(2) drilling fluid aqueous based tackifier of the present invention is carried and is cut agent and have excellent compatibleness, can be applicable to most of water base drilling fluid system, and can be applied to saturated salt-water drilling fluid system preferably;
(3) drilling fluid aqueous based tackifier of the present invention is carried and is cut agent and have excellent thickening and carry and cut performance and heat-resisting property, resisting temperature can reach more than 150 DEG C.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
The invention provides a kind of drilling fluid aqueous based tackifier and put forward the preparation method cutting agent, the method comprises the following steps:
(1) under agitation, anionic monomer, nonionic monomers and cationic monomer dissolved in water and mix;
(2) by step (1) gained mixed solution adjust ph to 5-10, and continue stir;
(3) in step (2) gained mixture, add oxygenant, reductive agent and azo initiator, and under agitation react.
In step (1), the present inventor finds, by anionic monomer, nonionic monomers and cationic monomer being coordinated in certain proportion, can obtain thickening and carrying and cut performance, heat-resisting property and the better product of system suitability.The present inventor finds through a large amount of tests, the amount ratio of anionic monomer, nonionic monomers and cationic monomer is: relative to the water of 7000 weight parts, the consumption of described anionic monomer is 550-650 weight part, the consumption of described nonionic monomers is 450-550 weight part, and the consumption of described cationic monomer is 200-300 weight part; Preferred amount ratio is: relative to the water of 7000 weight parts, and the consumption of described anionic monomer is 618-621 weight part, and the consumption of described nonionic monomers is 506-511 weight part, and the consumption of described cationic monomer is 238-242 weight part.
In step (1), there is no particular limitation for the condition of described stirring, anionic monomer, nonionic monomers and cationic monomer fully can be dissolved and fully mix, the condition of such as described stirring can comprise: stirring velocity is 300-450r/min, and churning time is 15-35min; The condition optimization of described stirring comprises: stirring velocity is 350-400r/min, and churning time is 20-30min.In the present invention, the prerequisite of described stirring velocity is that the diameter of stirring rake or stirrer can reach 1/3 of container bottoms diameter.
In step (1), described anionic monomer is preferably unsaturated acid, described nonionic monomers is preferably unsaturated amides, described cationic monomer is preferably quaternary ammonium salt and/or unsaturated ester, there is no particular limitation for the kind of wherein said unsaturated acid, unsaturated amides, quaternary ammonium salt and unsaturated ester, and what can use for this area routine prepares the kind that drilling fluid aqueous based tackifier carries unsaturated acid, unsaturated amides and quaternary ammonium salt and the unsaturated ester cutting agent.Described unsaturated acid can be selected from Phenylsulfonic acid, vinylformic acid, 2-acrylamide-2-methylpro panesulfonic acid, methyl propane sulfonic acid and methylene-succinic acid one or more, be preferably selected from Phenylsulfonic acid, vinylformic acid, 2-acrylamide-2-methyl propane sulfonic and methylene-succinic acid one or more, in preferred embodiment, only choose wherein one or both.Described unsaturated amides can be selected from n-methylolacrylamide, acrylamide, N, N '-methylene diacrylamine, N, one or more in N-DMAA, dimethylamino-propyl Methacrylamide and N-isopropyl acrylamide, be preferably selected from n-methylolacrylamide, acrylamide, N, N '-methylene diacrylamine and N, one or more in N-DMAA, in preferred embodiment, only choose wherein one or both.Described cationic monomer is preferably quaternary ammonium salt and/or unsaturated ester, wherein said quaternary ammonium salt can be selected from diethyl diallyl ammonium chloride, dimethyl diallyl ammonium chloride and trimethylallylammonium chloride one or more, described unsaturated ester can be selected from dimethylaminoethyl methacrylate and/or methacrylic dimethylaminoethyl, in preferred embodiment, only choose in quaternary ammonium salt and unsaturated ester one or both.
In step (2), by step (1) gained mixed solution adjust ph to 5-10, preferred adjust ph is to 7-9.There is no particular limitation for described adjust ph alkali used, and can be conventional alkali, such as alkali-metal oxyhydroxide be as sodium hydroxide.
The time of the service temperature of step (2), the speed of stirring and stirring, all there is no particular limitation, such as, the service temperature of step (2) can be 25-45 DEG C, and the speed stirred can be 250-450r/min, and the time of stirring can be 20-60min; Preferably, the service temperature of step (2) is 30-40 DEG C, and the speed stirred is 300-400r/min, and the time of stirring is 30-50min.The control mode of described service temperature is preferably: container is placed in water-bath and heats, to keep comparatively constant temp.
In step (3), in step (2) gained mixture, add oxygenant, reductive agent and azo initiator, and stirring reaction.Prior art prepare drilling fluid aqueous based tackifier carry cut agent time, usually only add reductive agent and oxygenant, and the present inventor find, if especially add azo initiator, the performance of obtained product can be improved significantly.And the large quantifier elimination of the present inventor's process finds, need strictly to control the consumption proportion of azo initiator, reductive agent and oxygenant, obtained product just can be made to possess better thickening and put forward the over-all properties of cutting performance, heat-resisting property and system suitability.Preferably, the weight ratio of the consumption of described azo initiator, reductive agent and oxygenant is 1-3:3-5:1-3; More preferably, the weight ratio of the consumption of described azo initiator, reductive agent and oxygenant is 1-1.3:3.3-3.5:1.2-1.4; Wherein, the consumption of described azo initiator accounts for the 0.2-1 % by weight of anionic monomer, nonionic monomers and cationic monomer gross weight described in step (1), is preferably 0.4-0.6 % by weight.
In step (3), described azo initiator can be conventional azo initiator, be preferably selected from 2,2'-Azobis(2,4-dimethylvaleronitrile), azo two Butyramidine, hydrochloride, azo isobutyl cyano group methane amide, azo two isobutyl imidazoline hydrochloride and Diisopropyl azodicarboxylate one or more, be preferably selected from 2,2'-Azobis(2,4-dimethylvaleronitrile), azo two Butyramidine, hydrochloride and Diisopropyl azodicarboxylate further one or more.There is no particular limitation for described reductive agent, use the reductive agent of this area routine, such as can be selected from sodium bisulfite, ferrous sulfate, thiocarbamide and S-WAT one or more, be preferably selected from sodium bisulfite, ferrous sulfate, S-WAT one or more.There is no particular limitation for described oxygenant, use the oxygenant of this area routine, such as can be selected from ammonium persulphate, Potassium Persulphate, hydrogen peroxide and tertbutyl peroxide one or more, be preferably selected from ammonium persulphate, Potassium Persulphate and hydrogen peroxide one or more.
In step (3), there is no particular limitation for the feed postition of described azo initiator, reductive agent and oxygenant, can add simultaneously, also can add successively.One of the present invention preferred embodiment in, under the condition stirred, in step (2) gained mixture, add oxygenant, reductive agent and azo initiator successively, the interval time added is for can add lower a kind of material when observing front a kind of material and roughly dissolving.
In step (3), there is no particular limitation for the temperature and time of described reaction, and the temperature of such as described reaction can be 25-45 DEG C, and the time of reaction can be 2-6h; Preferably, the temperature of described reaction is 30-40 DEG C, and the time of reaction is 3-5h.Also there is no particular limitation for the speed of described stirring, is preferably comparatively gentle stirring, and the speed such as stirred can be 200-350r/min, is preferably 250-300r/min.
In the present invention, described drilling fluid aqueous based tackifier is put forward the preparation method cutting agent and is also comprised: step (3) products therefrom is dry and to be milled into particle diameter be 40-80 object powder.There is no particular limitation for the condition of described drying, and preferably, drying temperature is 85-95 DEG C, and time of drying is 8-16h.There is no particular limitation for described mode of milling, and can use the milling of this area routine, can reach the preferred particle diameter of the present invention.The particle diameter of described powder is 20-100 order, is preferably 40-80 order.
Present invention also offers drilling fluid aqueous based tackifier that method according to the present invention prepares to carry and cut agent.Drilling fluid aqueous based tackifier of the present invention is carried and is cut agent and have excellent thickening and carry and cut performance, heat-resisting property and system suitability, the thickening of its excellence is carried and is cut performance and be embodied in: drilling fluid system can be made to obtain higher ratio of dynamic shear force/yield value to plastic viscosity, OPTIMIZATION OF DRILLING FLUID flow pattern well, raising system yield value, strengthens system large rock-carrying ability.Use drilling fluid aqueous based tackifier of the present invention to carry and cut agent, the apparent viscosity of common drilling fluid system (AV) can be made to reach more than 30mPas, and ratio of dynamic shear force/yield value to plastic viscosity reaches more than 1.6Pa/mPas; And the apparent viscosity (AV) of saturated cigarette drilling fluid system can be made to reach more than 25mPas, and ratio of dynamic shear force/yield value to plastic viscosity reaches more than 0.4Pa/mPas.Further, even up to after aging 16h at the temperature of 180 DEG C more than 150 DEG C, drilling fluid aqueous based tackifier of the present invention is carried and is cut agent and still can show good over-all properties.
Drilling fluid aqueous based tackifier of the present invention puies forward the application mode that the application mode of cutting agent is this area routine, such as, starch with base and mix rear use.Drilling fluid aqueous based tackifier of the present invention carry cut agent consumption can for this area routine for configuring water-base drilling fluid time thickening used carry the consumption cutting agent.Such as, when drilling fluid is typical well liquid system, with the weight of base slurry for benchmark, it can be 0.1-2 % by weight that thickening of the present invention carries the consumption cutting agent, is preferably 0.3-1 % by weight; When drilling fluid is saturated salt drilling fluid system, with the weight of base slurry for benchmark, it can be 2-10 % by weight that thickening of the present invention carries the consumption cutting agent, is preferably 3-7 % by weight.
Below will be described the present invention by embodiment.
Embodiment 1
(1) under normal temperature by water, Phenylsulfonic acid, acrylamide, dimethylaminoethyl methacrylate in mass ratio 7000:600:500:200 mixing, under the stirring velocity of 400r/min, stir 25min;
(2) by step (1) gained solution adjust ph to 8, and under the water bath condition of 35 DEG C, continue to stir 40min by the stirring velocity of 350r/min; Then
(3) ammonium persulphate, sodium bisulfite and Diisopropyl azodicarboxylate is added successively by the mass ratio of 2:4:2, and with the stirring velocity stirring reaction 4 hours of 300r/min, wherein the weight of azo initiator is 0.5 % by weight of solid material gross weight in step (1);
(4) by step (3) gained mixture at 90 DEG C dry 12 hours, be then milled into median size and be about 60 object powder, be the finished product.
Embodiment 2
(1) under normal temperature by water, vinylformic acid, acrylamide, dimethyl diallyl ammonium chloride in mass ratio 7000:550:550:250 mixing, under the stirring velocity of 350r/min, stir 20min;
(2) by step (1) gained solution adjust ph to 7, and under the water bath condition of 30 DEG C, continue to stir 30min by the stirring velocity of 300r/min; Then
(3) Potassium Persulphate, sodium bisulfite and 2,2'-Azobis(2,4-dimethylvaleronitrile) is added successively by the mass ratio of 1:3:1, and with the stirring velocity stirring reaction 3 hours of 250r/min, wherein the weight of azo initiator is 0.2 % by weight of solid material gross weight in step (1);
(4) by step (3) gained mixture at 85 DEG C dry 16 hours, be then milled into median size and be about 80 object powder, be the finished product.
Embodiment 3
(1) under normal temperature by water, 2-acrylamide-2-methylpro panesulfonic acid, N, N '-methylene diacrylamine, dimethylaminoethyl methacrylate in mass ratio 7000:550:450:300 mixing, under the stirring velocity of 400r/min, stir 30min;
(2) by step (1) gained solution adjust ph to 9, and under the water bath condition of 40 DEG C, continue to stir 50min by the stirring velocity of 400r/min; Then
(3) hydrogen peroxide, S-WAT and azo two isobutyl imidazoline hydrochloride is added successively by the mass ratio of 3:5:3, and with the stirring velocity stirring reaction 5 hours of 300r/min, wherein the weight of azo initiator is 1 % by weight of solid material gross weight in step (1);
(4) by step (3) gained mixture at 95 DEG C dry 8 hours, be then milled into median size and be about 40 object powder, be the finished product.
Comparative example 1
According to patent CN101955758A embodiment disclosed in method implement, obtain drilling fluid thickening and carry and cut agent.
Comparative example 2
Carry out with reference to the method for embodiment 1, difference is, in step (3), do not add azo initiator, obtains drilling fluid thickening and carries and cut agent.
Performance evaluation
The drilling fluid thickening of above-described embodiment and comparative example gained is carried and cuts agent product and carry out performance evaluation according to following evaluation method:
1, outward appearance
The each product appearance of visual inspection under natural light condition, finds that obtained by embodiment and comparative example, product is white solid powder.
2, thickening is carried and is cut performance
The configuration of 2.1 drilling fluid base slurries
The water-base drilling fluid base slurry of experimental formula two type:
(1) water base wilkinite drilling fluid base slurry I: water+4 % by weight wilkinite (Weifang Hong Xiang wilkinite company, WFM18-NJPRT)+2.5 % by weight Na
2cO
3
(2) water base saturated salt drilling fluid base slurry II: water+4 % by weight wilkinite (Weifang Hong Xiang wilkinite company, WFM18-NJPRT)+2.5 % by weight Na
2cO
3+ 36 % by weight NaCl
Above-mentioned weight percentage with the weight of water for benchmark.
The compound method of base slurry comprises: under the condition stirred, and is added successively by each material in formula and makes it mix.
2.2 thickening properties and ratio of dynamic shear force/yield value to plastic viscosity
Configure two kinds of base slurries are respectively got 6 parts, every part of 400mL, a copy of it is as blank, other 5 parts of base slurry I are stirred the embodiment 1-3 and comparative example 1-2 products obtained therefrom that add 0.5 % by weight (with base slurry weight for benchmark) respectively, and other 5 parts of base slurry II are stirred the embodiment 1-3 and comparative example 1-2 products obtained therefrom that add 5 % by weight (with base slurry weight for benchmark) respectively.Obtain 12 parts of drilling fluids are stirred with the speed of 10000r/min with stirrer respectively, the viscosity six fast rotational viscosimeters measuring respectively drilling fluid ф 600, ф 300, ф 200, ф 100, ф 6, ф 3 is defined in by GB/T16783.1-2006, then the gel strength (G10 "/10 ') of its apparent viscosity (AV), plastic viscosity (PV), yield value (YP) and 10s, 10min is calculated; and calculate ratio of dynamic shear force/yield value to plastic viscosity (J) further, method of calculation are as follows:
AV＝1/2Φ600
PV＝Φ600-Φ300
YP＝1/2(2Φ300-Φ600)
J＝YP/PV
Based on the test result of base slurry I and II respectively in " before aging " of table 1 and table 2 shown in hurdle.
3, heat-resisting property
Repeat the test of above-mentioned outward appearance and thickening property, difference is, before detection data, first by test substance respectively aging 16h under the high temperature of differing temps, result respectively in table 1 and table 2 " after aging " hurdle shown in.
Table 1
Table 2
Can be found out by comparing embodiment and comparative example, drilling fluid aqueous based tackifier of the present invention is carried the ratio of dynamic shear force/yield value to plastic viscosity cutting agent and is significantly greater than comparative example, carry cut performance comparatively comparative example have a distinct increment; Drilling fluid aqueous based tackifier of the present invention is carried and is cut agent still maintain higher ratio of dynamic shear force/yield value to plastic viscosity after high temperature ageing, has better heat-resisting property.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Claims (10)
1. drilling fluid aqueous based tackifier puies forward the preparation method cutting agent, and the method comprises the following steps:
(1) under agitation, anionic monomer, nonionic monomers and cationic monomer dissolved in water and mix;
(2) by step (1) gained mixed solution adjust ph to 5-10, and continue stir;
(3) in step (2) gained mixture, add oxygenant, reductive agent and azo initiator, and under agitation react.
2. method according to claim 1, wherein, in step (1), relative to the water of 7000 weight parts, the consumption of described anionic monomer is 550-650 weight part, the consumption of described nonionic monomers is 450-550 weight part, and the consumption of described cationic monomer is 200-300 weight part.
3. method according to claim 1 and 2, wherein, in step (1), described anionic monomer is unsaturated acid, and described nonionic monomers is unsaturated amides, and described cationic monomer is quaternary ammonium salt and/or unsaturated ester;
Preferably, described anionic monomer is selected from one or more in Phenylsulfonic acid, vinylformic acid, 2-acrylamide-2-methyl propane sulfonic, methyl propane sulfonic acid and methylene-succinic acid;
Preferably, described nonionic monomers is selected from n-methylolacrylamide, acrylamide, N, N ' one or more in-methylene diacrylamine, N,N-DMAA, dimethylamino-propyl Methacrylamide and N-isopropyl acrylamide;
Preferably, described cationic monomer is selected from one or more in diethyl diallyl ammonium chloride, trimethylallylammonium chloride, methacrylic dimethylaminoethyl, dimethylaminoethyl methacrylate and dimethyl diallyl ammonium chloride.
4. method according to claim 1, wherein, in step (2), by step (1) gained mixed solution adjust ph to 7-9.
5. the method according to claim 1 or 4, wherein, the service temperature of step (2) is 25-45 DEG C, and the speed stirred is 250-450r/min, and the time of stirring is 20-60min;
Preferably, the service temperature of step (2) is 30-40 DEG C, and the speed stirred is 300-400r/min, and the time of stirring is 30-50min.
6. method according to claim 1, wherein, in step (3), the weight ratio of the consumption of described azo initiator, reductive agent and oxygenant is 1-3:3-5:1-3, and the consumption of wherein said azo initiator accounts for the 0.2-1 % by weight of anionic monomer, nonionic monomers and cationic monomer gross weight described in step (1);
Preferably, the feed postition of described oxygenant, reductive agent and azo initiator is for add successively.
7. the method according to claim 1 or 6, wherein, in step (3), described azo initiator be selected from 2,2'-Azobis(2,4-dimethylvaleronitrile), azo two Butyramidine, hydrochloride, azo isobutyl cyano group methane amide, azo two isobutyl imidazoline hydrochloride and Diisopropyl azodicarboxylate one or more;
Preferably, described reductive agent is selected from one or more in sodium bisulfite, ferrous sulfate, thiocarbamide and S-WAT;
Preferably, described oxygenant is selected from one or more in ammonium persulphate, Potassium Persulphate, hydrogen peroxide and tertbutyl peroxide.
8. method according to claim 1, wherein, in step (3), the temperature of described reaction is 25-45 DEG C, and the time of reaction is 2-6h, and the speed of stirring is 200-350r/min;
Preferably, the temperature of described reaction is 30-40 DEG C, and the time of reaction is 3-5h, and the speed of stirring is 250-300r/min.
9. according to the method in claim 1-8 described in any one, wherein, described method also comprises: step (3) products therefrom is dry and to be milled into particle diameter be 20-100 object powder.
10. the drilling fluid aqueous based tackifier that the method in claim 1-9 described in any one prepares is carried and is cut agent.
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Cited By (5)
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| CN105754562A (en) * | 2016-03-23 | 2016-07-13 | 中国石油天然气集团公司 | Tackifier and shear strength improving agent for drilling fluid for extended reach wells as well as preparation method and application thereof |
| CN106084125A (en) * | 2016-07-19 | 2016-11-09 | 中国石油大学(北京) | Copolymer being applicable to extracting and cutting agent and its preparation method and application and saturated salt-water drilling fluid and application thereof |
| CN107163184A (en) * | 2017-05-08 | 2017-09-15 | 中国石油集团渤海钻探工程有限公司 | Clay-free drilling fluid high temperature resistance extracting and cutting agent and preparation method thereof |
| CN108003851A (en) * | 2018-01-12 | 2018-05-08 | 中国海洋石油集团有限公司 | A kind of drilling fluid extracting and cutting agent and preparation method thereof |
| CN111171225A (en) * | 2018-11-12 | 2020-05-19 | 中石化石油工程技术服务有限公司 | Preparation method of tackifying and shear strength improving agent for drilling fluid and drilling fluid |
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Effective date of registration: 20180108 Address after: 102249 Beijing city Changping District Road No. 18 Patentee after: China University of Petroleum (Beijing) Address before: 102249 Beijing city Changping District Road No. 18, China University of Petroleum (Beijing) Institute of Petroleum Engineering Patentee before: Jiang Guancheng |