CN103013466A - Solid paraffin lubricant for drilling fluid and preparation method of solid paraffin lubricant - Google Patents
Solid paraffin lubricant for drilling fluid and preparation method of solid paraffin lubricant Download PDFInfo
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Abstract
The invention relates to a solid paraffin lubricant for drilling fluid and a preparation method of the solid paraffin lubricant. The preparation method comprises the following steps of respectively adding oil phase, sodium hydroxide, a compound emulsifier, a stabilizer and a water phase in a reactor, heating and stirring, so as to obtain a liquid emulsified paraffin lubricant; immersing the prepared liquid paraffin lubricant in a characteristic water soluble high molecular material by using a semi-dry method, drying at low temperature, and crushing, so as to obtain the solid paraffin lubricant for drilling fluid. The lubricant product obtained according to the method provided by the invention has the characteristics of high drilling fluid dispersion speed, small particles and excellent composite lubricating effect. Compared with the traditional emulsion type paraffin lubricant, the solid paraffin lubricant provided by the invention has higher overall performances such as lubricating property, high temperature resistance, filtrate loss reducing property and salt resistance, and is convenient to store and transport, thus packaging and transporting costs are reduced but also the problems of emulsion instability of the traditional paraffin lubricant after being stored for a long time and freezing in winter are solved.
Description
Technical field
The present invention relates to a kind of lubricant and preparation method thereof, relate in particular to a kind of drilling fluid solid paraffin lubricant and preparation method thereof.
Background technology
Lubricate and sticking control problem in the drilling process is drilling engineering, the technical barrier that particularly often runs in the Holes of Complicated Wells drilling wells such as deep-well, orientation well, horizontal well, multilateral well.Lubricant for drilling fluid is as a kind of important drilling fluid chemical processing agent, and its effect is the lubricity of improving drilling fluid, reduces the friction between drilling tool and the borehole wall (or sleeve pipe), reduces drill string rotating moment of torsion and the resistance that makes a trip, and reduces the generation of lock of tool drilling.
In recent years, more and more higher to the requirement of lubricant for drilling fluid performance along with development and the raising of deep-well, orientation well and horizontal well drilling technology, the lubricant kind of use and quantity are also more and more.The lubricant that effluxes in the rejected well drilling liquid is poisonous and hazardous a bit, also has quite a few under field conditions (factors) than difficult degradation, causes thus this class material in the medium-term and long-term delay of environment and accumulation, and human and ecotope are constituted a threat to.Along with the enhancing of environmental consciousness, people's attaching importance to environmental protection more and more when the development of new lubricant for drilling fluid also requires as far as possible without fluorescence or low fluorescence simultaneously, and drilling fluid rheology without impact, is further improved the high-temperature resisting and salt-resisting ability.
The crude oil in China majority is paraffinic crude, and this just provides abundant and valuable resource for the production of development paraffin class product.Eighties of last century fifties, Mobil Oil Corp.'s exploitation emulsified olefin that begins one's study, the seventies, Britain, Japan also begin one's study and using emulsion paraffin.In recent years, the domestic research that also begins a large amount of this respects.
Drilling fluid can be divided into liquid type and solid kind with the paraffin lubricant according to form.The research of emulsion-type paraffin lubricant is relatively many, in recent years, also has much about the research of solid type lubricant for drilling fluid, but does not still have disclosed technical literature and patent about solid powdery paraffin lubricant.
Patent CN 1306012C, CN 101423752A, CN 1699500A disclose the technological method of several preparation emulsion-type paraffin lubricants, but the problems such as long-time storage is unstable, freeze winter easily that emulsion type products all exists are so that rig-site utilization is restricted.
For example CN 101157850, adopt animal-plant oil to prepare liquid lubricant, again liquid and oil-soluble resin, graphite are mixed to get high temperature resistant lubricant for drilling liquid, and its oilness is better; Patent US 5826669 is by adding sufficient whippy graphite granule in drilling fluid, designed a kind of lubricant that effectively reduces make a trip resistance and rotary torque, but graphite is difficult to reach requirement as the lubricating oil absorption carrier for the higher marine drilling of environmental requirement, and does not almost have filtrate loss controllability.
Patent CN 1861736A has announced a kind of method of utilizing sodium bentonite carrier surface promoting agent to prepare solid lubricant for well drilling liquid, to carry out the scene composite but it need add diesel oil in use, use inconvenience, and the diesel oil fluorescence is very strong, well logging is produced disturb.In addition, patent CN 1183231C utilizes cooling down moulding after melt paraffin and the surfactivity blend, has invented a kind of solid self-emulsifying paraffin, although solved the accumulating problem of product, but the paraffin solid need to dissolve emulsification in hot water, and the effect that does not have the potion multiple-effect.
Therefore, it is significant for oil drilling to develop under a kind of suitable cold condition the low fluorescence non-toxic solid lubricant product that uses, has the effect of potion multiple-effect.
Summary of the invention
Deficiency for existing research, the problem to be solved in the present invention provide a kind of drilling fluid with the solid paraffin lubricant with and preparation method thereof, the solid lubricant that utilizes the inventive method to obtain has good dispersity in drilling fluid, comprehensive lubricity is good, sticking coefficient and the high characteristics of coefficient of friction resistance reduced rate have preferably high-temperature resisting and salt-resisting filtration reduction simultaneously.In addition, preparation method of the present invention is simple, and technique is easy to realize that prepared solid lubricant state is the free flowing powder solid, convenient transport, and the low temperature use properties is unaffected.
Therefore, according to first aspect present invention, provide the preparation method of a kind of drilling fluid with the solid paraffin lubricant, it may further comprise the steps:
(1) takes by weighing following weight proportion component: oil phase 20-50 part, sodium hydroxide 0.5-2 part, compound emulsifying agent 1-10 part, stablizer 0.1-1 part, water 37-78.4 part;
(2) above-mentioned oil phase, sodium hydroxide, compound emulsifying agent, stablizer and water are mixed by described component ratio add in the reactor, under 70-100 ℃, 100-2000 rev/min condition, stir 15-60min, make liquid lubricant;
(3) take by weighing following weight proportion component: the liquid lubricant 20-50 part that obtains in characteristic macromolecular material 50-80 part, step (2);
(4) aforesaid liquid lubricant and characteristic polymer are invaded by described component ratio soak reaction;
(5) through 60-100 ℃ of oven drying at low temperature, disintegrating process, obtain solid lubricant for well drilling liquid;
Wherein:
Described oil phase is mineral oil and waxy substance;
Described compound emulsifying agent is polyvalent alcohol lipid nonionogenic tenside;
Described stablizer is inorganic nano-particle;
Described characteristic macromolecular material is to have the water-soluble high-molecular material that falls the leak-off effect.
Among the preparation method of above-mentioned drilling fluid with the solid paraffin lubricant, described mineral oil is whiteruss, 7# white oil, 10# white oil, 15# white oil, 26# white oil or 46# white oil; Further preferred 46# white oil.
Described waxy substance is paraffin, slack wax, vegetable wax, wax-pattern recycling wax, paraffin removal from oil well operation recycling wax; Further preferred slack wax, since the easier emulsification of slack wax, the emulsion stable homogeneous for preparing.
The preferred Sp an of described polyvalent alcohol lipid nonionogenic tenside and Tween series of surfactants; Further preferred Sp an20, Sp an40, Sp an 60 or Span80 and Tween20, Tween40, Tween60 or Tween80; Most preferably Span80 and Tween80.
Described fatty acid alkyl amide class assistant for emulsifying agent preferred fatty acid and trolamine direct reaction product.
The mixture of the preferred white carbon black of described inorganic nano-particle stablizer, calcium carbonate superfine powder, bentonite gel, attapulgite gel or its arbitrary proportion; Further preferred white carbon black and attapulgite gel.
Among the preparation method of above-mentioned drilling fluid with the solid paraffin lubricant, in step (2), described component is preferably with 80-100 ℃, 200-500 rev/min condition stirring 20-40min.
Described have the preferred silicone oil graft starch of the characteristic water-soluble high-molecular material that falls the leak-off effect (SiM), cellulose graft starch (PPS), a polyacrylonitrile ammonium salt (NH
4PAN), poly-(vinyl cyanide-acrylamide) ammonium salt (double focusing ammonium salt) (HMP-21), the mixture of valchovite (SPNH), sulfonated lignite (SMC) or its arbitrary proportion; Further preferred PPS because PPS is filamentary structure, so that oil-in-water-type paraffin wax emulsions particle can be invaded wherein, pulverizes through semidry process, oven dry and obtains preferably solid lubricant of lubricity.
Among the preparation method of above-mentioned drilling fluid with the solid paraffin lubricant, the described component of step (5) is preferably with 70-90 ℃ of condition oven dry.
According to second aspect present invention, a kind of drilling fluid that makes according to aforesaid method solid paraffin lubricant is provided, it is characterized in that, described solid lubricant comprises the component of following weight proportion: characteristic macromolecular material 50-80 part, preferred 55-75 part, liquid lubricant 20-50 part, preferred 25-45 part; Wherein:
Described liquid lubricant comprises the component of following weight proportion: oil phase 30-50 part, and sodium hydroxide 0.5-2 part, compound emulsifying agent 2-6 part, stablizer 0.1-1 part, water 41-67.4 part is based on 100 weight part liquid lubricants;
Wherein:
Described oil phase is mineral oil and waxy substance;
Described compound emulsifying agent is polyvalent alcohol lipid nonionogenic tenside;
Described stablizer is inorganic nano-particle;
Described characteristic macromolecular material is to have the water-soluble high-molecular material that falls the leak-off effect.
According to the preferred embodiment of the present invention, described drilling fluid is with in the solid paraffin lubricant, and the characteristic macromolecular material is the 60-70 weight part, and liquid lubricant is the 30-40 weight part.
According to the preferred embodiment of the present invention, described drilling fluid is with in the solid paraffin lubricant, described liquid lubricant comprises the component of following weight proportion: oil phase 40-45 part, sodium hydroxide 0.8-1 part, compound emulsifying agent 3-5 part, stablizer 0.5-0.8 part, water 48.2-55.7 part is based on 100 weight part liquid lubricants.
According to the preferred embodiment of the present invention, described drilling fluid is used in the solid paraffin lubricant, the preferred 46# white oil of described mineral oil; And/or the preferred slack wax of described waxy substance; The preferred Sp an80 of described polyvalent alcohol lipid nonionogenic tenside and Twe en80; And/or the preferred white carbon black of described inorganic nano-particle stablizer and attapulgite gel; And/or describedly has a preferred PP S of the characteristic water-soluble high-molecular material that falls the leak-off effect.
The drilling fluid that the method for the invention makes is light brown pressed powder with solid paraffin lubricant outward appearance, and free from extraneous odour, lubricant are scattered in the drilling fluid for receiving the micron-scale particle.
Drilling fluid of the present invention solid paraffin lubricant, sticking coefficient reduced rate and coefficient of friction resistance reduced rate all can be controlled in 55%-90%, and comprehensive lubricity is better.
The present invention's beneficial effect compared with prior art is:
(1) the easier emulsification of the slack wax of one of raw material, the emulsion stable homogeneous for preparing; The PPS of one of characteristic water-soluble high-molecular material is filamentary structure, so that oil-in-water-type paraffin wax emulsions particle can immerse wherein, pulverizes through semidry process, oven dry and obtains preferably solid lubricant of lubricity.
(2) have good comprehensive lubricity, can effectively reduce sticking coefficient and the coefficient of friction resistance of drilling fluid base slurry, play the effect of lubricated drilling tool and the borehole wall.
(3) can form the oil film protective layer in the borehole wall, stop drilling fluid and filtrate thereof to enter the stratum, crack, shutoff stratum prevents slump in, has the performance of good protection oil bearing reservoir.
(4) have good high temperature resistance, salt resistance, easily disperse, hang down fluorescence, hypotoxicity, satisfy the requirement of environment protection.
(5) have preferably High Temperature High Pressure filtrate loss controllability, 4% brine mud, 120 ℃, the High Temperature High Pressure decline leak-off rate of 3.5MPa pressure reduction reach more than 50%.
(6) cold condition uses unaffectedly, prevents that effectively traditional liquid paraffin lubricant from storing layering and solidify with winter and easily freeze because of long-time, has transportation and stores conveniently, saves and packs and the characteristics of transportation cost.
Description of drawings
Fig. 1: the different dosages of solid paraffin lubricant are to the influence degree of base slurry sticking coefficient reduced rate and coefficient of friction resistance reduced rate;
Fig. 2: the stereoscan photograph contrast of characteristic macromolecular material and solid paraffin lubricant: (a) characteristic polymer; (b) solid paraffin lubricant of the present invention;
Fig. 3: solid paraffin lubricant Laser particle-size distribution figure.
Embodiment
Further explain and describe by the following examples content of the present invention.But the embodiment that provides should not be understood to protection domain of the present invention is construed as limiting.
Performance evaluation
The sticking coefficient reduced rate of the lubricant that the present invention relates to, coefficient of friction resistance reduced rate, High Temperature High Pressure filtration reduction experiments of measuring are as follows:
1, the sticking coefficient reduced rate is measured:
Add the calcareous sodium-ionized bentonite of 26g in 500mL distilled water, with 10000 rev/mins rotating speed high-speed stirring 20min, the airtight ageing 16h of room temperature then namely obtains containing the soil amount and is 5.2% fresh water-based slurry on high speed agitator.5.2% fresh water-based of ageing 16h slurry is by certain proportioning adding lubricant during measurement, and high-speed stirring 20min measures and adopts NF-1 type sticking coefficient determinator.The mud that configures poured in the liquid holding cup, added the pressure 30min of 3.5MPa, then measure the filter loss of this moment, and the pressure that adds 3.5MPa coils in adhesion, press 5min after torque meter measure moment of torsion, then calculate, calculation formula is as follows:
f=M×0.845×10
-2
In the formula: f is that sticking coefficient M is moment of torsion (Nm)
The calculating of sticking coefficient reduced rate:
△K
f＝（f
1－f
2）/f
1×100％
In the formula: f
1Be the sticking coefficient of base slurry itself, f
2For adding the sticking coefficient of mud behind certain content lubricant.
2, coefficient of friction resistance reduced rate is measured:
Add the calcareous sodium-ionized bentonite of 26g in 500mL distilled water, with 10000 rev/mins rotating speed high-speed stirring 20min, the airtight ageing 16h of room temperature then namely obtains containing the soil amount and is 5.2% fresh water-based slurry on high speed agitator.Employing E-P extreme boundary lubrication instrument is measured the coefficient of friction resistance after basic slurry, distilled water and base slurry add lubricant, the 5.2% fresh water-based slurry of ageing is added lubricant by certain proportioning, adopt GJ-2S type homogenizer high-speed stirring 5min, liquid is poured in the lubricity tester sample cup, test condition is 60r/min, test pressure is 1.5MPa, and the test duration is 5min, reading behind the 5min.Correction factor=34/ distilled water reading, coefficient of friction resistance f=0.01 * reading * correction factor.
△f=（f
1－f
2）/f
1×100％
In the formula: f
1Be the coefficient of friction resistance of base slurry itself, f
2For adding the coefficient of friction resistance of mud behind certain content lubricant.
3, high temperature and high pre ssure filtration:
(1) fresh water-based slurry: add the calcareous sodium-ionized bentonite of 24g in the 400mL deionized water, with 10000 rev/mins rotating speed high-speed stirring 20min, then the airtight ageing 16h of room temperature namely obtains 6.0% fresh water-based slurry on high speed agitator.The base of ageing 16h slurry is by certain proportioning adding lubricant during measurement, and high-speed stirring 20min measures and adopts GGS 42-2 type high pressure high temperature filter tester.The mud that configures is poured in the pressure filter, pressurization 3.5Mp a, be warming up to 120 ℃, timing when opening the top and the bottom valve rod, the filtrate filter loss of record 30min.
Percentage of water loss=(V falls in High Temperature High Pressure
1-V
2)/V
1* 100%
In the formula: V
1Be the filter loss of the filtrate of base slurry itself, V
2For adding the filter loss of certain content lubricant rear filtrate.
(2) brine mud: in the 400mL deionized water, add 16gNa Cl, 10000 rev/mins of high-speed stirring 20min, add again the calcareous sodium-ionized bentonite of 24g, on high speed agitator with 10000 rev/mins rotating speed high-speed stirring 20min, then the airtight ageing 16h of room temperature namely obtains containing the soil amount and is 6.0% brine mud.The base of ageing 16h slurry is by certain proportioning adding lubricant during measurement, and high-speed stirring 20min measures and adopts GGS42-2 type high pressure high temperature filter tester.The mud that configures is poured in the pressure filter, the pressurization 3.5Mpa, be warming up to 120 ℃, timing when opening the top and the bottom valve rod, the record 30min the filtrate filter loss.
Percentage of water loss=(V falls in High Temperature High Pressure
1-V
2)/V
1* 100%
In the formula: V
1Be the filter loss of the filtrate of base slurry itself, V
2For adding the filter loss of certain content lubricant rear filtrate.
Lubricant composition is as follows: be weight part (unit: kilogram):
22.5 parts of white oils, 22.5 parts of slack waxs, 1 part in sodium hydroxide, nonionic surface active agent Span 80 and Tween804.7 part, 0.3 part of white carbon black, 49 parts of distilled water.
35 parts of characteristic water soluble macromolecular PPS get 65 parts of the above-mentioned liquid lubricants for preparing.
Preparation method: 49 parts of 22.5 parts of white oils, 22.5 parts of slack waxs, nonionic surface active agent Span 80 and Tween804.7 part, 0.3 part of white carbon black, distilled water are mixed in reactor, 85 ℃, 300 rev/mins conditions continue to stir 20min, obtain the drilling fluid liquid lubricant.Get 65 parts of above-mentioned lubricants that makes and mix with 35 parts of PP S, evenly invade under 80 ℃ of conditions and soak, 80 ℃ of oven drying at low temperatures are pulverized, and obtain drilling fluid solid paraffin lubricant.
According to the said products method of evaluating performance, respectively the solid paraffin lubricant product of embodiment 1 and two kinds of commercially available emulsion-types and solid type lubricant are estimated, the result is as shown in Table 1.
The comprehensive lubricity comparative evaluation result of table one embodiment product (5.2% fresh water bentonite base slurry)
Fig. 1 is that the different dosages of prepared solid paraffin lubricant are to the influence degree graphic representation of base slurry sticking coefficient reduced rate and coefficient of friction resistance reduced rate.
Substantially as described in the example 1, difference is method:
Lubricant composition is as follows, is weight part (unit: kilogram):
20 parts of white oils, 20 parts of slack waxs, 1 part in sodium hydroxide, 805 parts of nonionic surface active agent Span80 and Tween, 0.5 part of calcium carbonate superfine powder, 53.5 parts of distilled water.
30 parts of characteristic polymer PPS get 70 parts of the above-mentioned liquid lubricants for preparing.
The preparation method: said components is mixed in reactor, and 75 ℃, 100 rev/mins conditions continue to stir 60min, obtain the drilling fluid liquid lubricant.Get 70 parts of above-mentioned lubricants that makes and evenly invade under 70 ℃ of conditions with 30 parts of PPS and soak, 100 ℃ of oven drying at low temperatures are pulverized, and obtain drilling fluid solid paraffin lubricant.
According to the said products method of evaluating performance, respectively the solid paraffin lubricant product of embodiment 2 and two kinds of commercially available emulsion-types and solid type lubricant are estimated, the result is as shown in Table 2.
Table two embodiment product High Temperature High Pressure filtrate loss controllability comparative evaluation result (6.0% fresh water and salt solution (4.0%) base slurry)
Substantially as described in embodiment 1 or 2, difference is method:
Lubricant composition is as follows: be weight part (unit: kilogram):
20 parts of white oils, 25 parts of slack waxs, 1 part in sodium hydroxide, nonionic surface active agent Span80 and Tween805 part, 0.6 part of attapulgite gel, 48.4 parts of distilled water.
35 parts of characteristic polymer PPS get 65 parts of the above-mentioned liquid lubricants for preparing.
The preparation method: said components is mixed in reactor, and 90 ℃, 2000 rev/mins conditions continue to stir 15min, obtain the drilling fluid liquid lubricant.Get 65 parts of above-mentioned lubricants that makes and evenly invade under 90 ℃ of conditions with 35 parts of PPS and soak, 70 ℃ of oven drying at low temperatures are pulverized, and obtain drilling fluid solid paraffin lubricant.
Fig. 2 is the stereoscan photograph contrast of characteristic macromolecular material and solid paraffin lubricant: (a) characteristic polymer; (b) the solid paraffin lubricant that makes of the present invention.As seen from the figure, be distributed as 1～10 μ m level fine particle paraffin particles adhering on the characteristic macromolecular material, be convenient to it and play lubrication.
Fig. 3 is the Laser particle-size distribution figure of the solid paraffin lubricant that makes of the present invention.As seen from the figure, load the particle diameter of the characteristic macromolecular material behind the wax grain mainly be distributed in 10 ~ 100 μ m level molecules, be convenient to it and play lubrication.
According to the above embodiments the present invention is described in detail.It should be noted that above embodiment is just to illustrating the present invention.Under the prerequisite that does not depart from spirit of the present invention and essence, those skilled in the art can design multiple alternative of the present invention and improvement project, and it all should be understood to be within protection scope of the present invention.
Claims (10)
1. a drilling fluid is with the preparation method of solid paraffin lubricant, and it may further comprise the steps:
(1) takes by weighing following weight proportion component: oil phase 20-50 part, sodium hydroxide 0.5-2 part, compound emulsifying agent 1-10 part, stablizer 0.1-1 part, water 37-78.4 part;
(2) above-mentioned oil phase, sodium hydroxide, compound emulsifying agent, stablizer and water are mixed by described component ratio add in the reactor, under 70-100 ℃, 100-2000 rev/min condition, stir 15-60min, make liquid lubricant;
(3) take by weighing following weight proportion component: characteristic macromolecular material 50-80 part, liquid lubricant 20-50 part that step (2) obtains;
(4) aforesaid liquid lubricant and characteristic polymer are invaded by described component ratio soak reaction;
(5) through 60-100 ℃ of oven drying at low temperature, disintegrating process, obtain solid lubricant for well drilling liquid;
It is characterized in that:
Described oil phase is mineral oil and waxy substance;
Described compound emulsifying agent is polyvalent alcohol lipid nonionogenic tenside;
Described stablizer is inorganic nano-particle; And/or
Described characteristic macromolecular material is to have the water-soluble high-molecular material that falls the leak-off effect.
2. according to claim 1 preparation method is characterized in that described mineral oil is whiteruss, 7# white oil, 10# white oil, 15# white oil, 26# white oil or 46# white oil; Further preferred 46# white oil; And/or described waxy substance is paraffin, slack wax, vegetable wax, wax-pattern recycling wax, paraffin removal from oil well operation recycling wax; Further preferred slack wax.
3. according to claim 1 and 2 preparation method, it is characterized in that, described polyvalent alcohol lipid nonionogenic tenside is Sp an and Tween series of surfactants, preferred Span20, Span40, Span60 or Span80 and Tween20, Tween40, Tween60 or Tween80, more preferably Span80 and Tween80.
4. according to claim 1 to one of 3 preparation method, it is characterized in that described inorganic nano-particle stablizer is the mixture of white carbon black, calcium carbonate superfine powder, bentonite gel, attapulgite gel or its arbitrary proportion, preferred white carbon black and attapulgite gel.
5. according to claim 1 to one of 4 preparation method, it is characterized in that, described have the characteristic water-soluble high-molecular material that falls the leak-off effect be silicone oil graft starch (SiM), cellulose graft starch (PPS), polyacrylonitrile ammonium salt (NH4PAN), poly-(vinyl cyanide-acrylamide) ammonium salt (double focusing ammonium salt) (HMP-21), the mixture of valchovite (SPNH), sulfonated lignite (SMC) or its arbitrary proportion, preferred PPS.
6. according to claim 1 to one of 5 preparation method, it is characterized in that the described component of step (2) stirs 20-40min with 80-100 ℃, 200-500 rev/min condition; And/or the described component of step (5) is dried with 70-90 ℃ of condition.
7. the drilling fluid solid paraffin lubricant that makes to one of 6 method according to claim 1 is characterized in that described solid lubricant is in 100 weight parts, component is: characteristic macromolecular material 50-80 part, preferred 55-75 part, liquid lubricant 20-50 part, preferred 25-45 part; Wherein:
Described liquid lubricant comprises the component of following weight proportion: oil phase 30-50 part, and sodium hydroxide 0.5-2 part, compound emulsifying agent 2-6 part, stablizer 0.1-1 part, water 41-67.4 part is based on 100 weight part liquid lubricants;
Wherein:
Described oil phase is mineral oil and waxy substance;
Described compound emulsifying agent is polyvalent alcohol lipid nonionogenic tenside;
Described stablizer is inorganic nano-particle;
Described characteristic macromolecular material is to have the water-soluble high-molecular material that falls the leak-off effect.
8. according to claim 7 drilling fluid solid paraffin lubricant is characterized in that described solid lubricant comprises: characteristic macromolecular material 60-70 weight part, liquid lubricant 30-40 weight part; And/or
Described liquid lubricant comprises the component of following weight proportion: oil phase 40-45 part, and sodium hydroxide 0.8-1 part, compound emulsifying agent 3-5 part, stablizer 0.5-0.8 part, water 48.2-55.7 part is based on 100 weight part liquid lubricants.
9. according to claim 7 or 8 drilling fluid solid paraffin lubricant, it is characterized in that the preferred 46# white oil of described mineral oil; And/or the preferred slack wax of described waxy substance; The described preferred Span80 of polyvalent alcohol lipid nonionogenic tenside and Tween80; And/or the preferred white carbon black of described inorganic nano-particle stablizer and attapulgite gel; And/or describedly has a preferred PPS of characteristic water-soluble high-molecular material that falls the leak-off effect.
According to claim 1 to one of 6 method make according to claim 7 to one of 9 drilling fluid solid paraffin lubricant.
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