CN103013466B - Solid paraffin lubricant for drilling fluid and preparation method of solid paraffin lubricant - Google Patents

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

A kind of solid paraffin lubricant for drilling fluid and preparation method thereof

technical field

The invention relates to a lubricant and a preparation method thereof, in particular to a solid paraffin lubricant for drilling fluid and a preparation method thereof.

Background technique

The problem of lubrication and anti-sticking during drilling is a technical problem often encountered in drilling engineering, especially in complex wells such as deep wells, directional wells, horizontal wells, and multi-branch wells. Drilling fluid lubricant is an important chemical treatment agent for drilling fluid. Its function is to improve the lubrication performance of drilling fluid, reduce the friction between the drilling tool and the well wall (or casing), reduce the rotational torque of the drill string and trip out resistance, reducing the occurrence of stuck pipe accidents.

In recent years, with the continuous development and improvement of deep well, directional well and horizontal well drilling technology, the requirements for the performance of drilling fluid lubricants are getting higher and higher, and the types and quantities of lubricants used are also increasing. Some of the lubricants in the discharged waste drilling fluid are toxic and harmful, and a considerable part of them are difficult to degrade under natural conditions, resulting in long-term retention and accumulation of such substances in the environment, posing a threat to humans and the ecological environment. With the increasing awareness of environmental protection, people pay more and more attention to environmental protection when developing new drilling fluid lubricants. At the same time, they also require as little or low fluorescence as possible, which has no effect on the rheology of drilling fluids, and further improves the ability to resist high temperature and salt.

Most of my country's crude oil is paraffin-based crude oil, which provides abundant and valuable resources for the development of the production of paraffin products. In the 1950s, Mobil Oil Company began to research and develop emulsified paraffin. In the 1970s, Britain and Japan also began to study and apply emulsified paraffin. In recent years, a lot of researches in this area have been started in China.

Paraffin lubricants for drilling fluids can be divided into liquid and solid according to their form. There are relatively many studies on emulsion-type paraffin lubricants. In recent years, there are also many studies on solid-type drilling fluid lubricants, but there are no published technical documents and patents on solid powder paraffin lubricants.

Patents CN 1306012C, CN 101423752A, and CN 1699500A disclose several technical methods for preparing emulsion-type paraffin lubricants, but emulsion-type products have problems such as long-term storage instability and easy freezing in winter, which limit field application.

For example CN 101157850 adopts animal and vegetable fats and oils to prepare liquid lubricants, and then liquid is mixed with oil-soluble resin and graphite to obtain high-temperature resistant lubricants for drilling fluids, which have better lubricity; Elastic graphite particles, designed a lubricant that can effectively reduce tripping resistance and rotational torque, but graphite as a lubricating oil adsorption carrier is difficult to meet the requirements of marine drilling with high environmental protection requirements, and has almost no fluid loss control performance .

Patent CN 1861736A discloses a method for preparing a solid lubricant for drilling fluid by using sodium-based bentonite-loaded surfactant, but it needs to add diesel oil for on-site compounding when it is used, which is inconvenient to use, and the fluorescence of diesel oil is very strong. Interference with mud logging. In addition, the patent CN 1183231C uses molten paraffin and surface active blending to cool and form a solid self-emulsifying paraffin. Although it solves the problem of product storage and transportation, the paraffin solid needs to be dissolved and emulsified in hot water. It has a multi-effect effect in one dose.

Therefore, it is of great significance for oil field drilling to develop a low-fluorescence non-toxic solid lubricant product suitable for use under low temperature conditions and having multiple effects in one dose.

Contents of the invention

In view of the deficiencies in existing research, the problem to be solved by the present invention is to provide a solid paraffin lubricant for drilling fluid and its preparation method. The solid lubricant obtained by the method of the present invention has good dispersibility in drilling fluid and comprehensive lubricating performance. Good, high adhesion coefficient and friction coefficient reduction rate, and good resistance to high temperature, salt and fluid loss. In addition, the preparation method of the present invention is simple, the process is easy to realize, the state of the prepared solid lubricant is a free-flowing powder solid, the transportation is convenient, and the low-temperature performance is not affected.

Therefore, according to the first aspect of the present invention, a kind of preparation method of paraffin wax lubricant for drilling fluid is provided, it may further comprise the steps:

(1) Weigh the following components by weight: 20-50 parts of oil phase, 0.5-2 parts of sodium hydroxide, 1-10 parts of compound emulsifier, 0.1-1 part of stabilizer, and 37-78.4 parts of water phase;

(2) Mix the above-mentioned oil phase, sodium hydroxide, compound emulsifier, stabilizer and water phase into the reactor according to the stated component ratio, and stir for 15- 60min, obtained liquid lubricant;

(3) Weigh the following components by weight: 50-80 parts of characteristic polymer material, 20-50 parts of liquid lubricant obtained in step (2);

(4) Immersing and reacting the above-mentioned liquid lubricant and the characteristic polymer according to the ratio of the components;

(5) After low-temperature drying and crushing at 60-100°C, solid lubricants for drilling fluids are obtained;

in:

The oily phase is mineral oil and waxy matter;

The composite emulsifier is a polyol lipid nonionic surfactant;

The stabilizer is an inorganic nanoparticle;

The characteristic polymer material is a water-soluble polymer material with fluid loss reducing function.

In the preparation method of solid paraffin lubricant for above-mentioned drilling fluid, described mineral oil is liquid paraffin, 7# white oil, 10# white oil, 15# white oil, 26# white oil or 46# white oil; More preferably 46# white oil.

The waxy substance is paraffin wax, wax paste, vegetable wax, wax mold recovery wax, oil well wax removal operation recovery wax; wax paste is further preferred, because wax paste is easier to emulsify, and the prepared emulsion is uniform and stable.

The preferred Span and Tween series surfactants of described polyol lipid nonionic surfactant; Further preferably Span20, Span40, Span60 or Span80 and Tween20, Tween40, Tween60 or Tween80; Most preferably Span80 and Tween80.

The fatty acid alkanolamide co-emulsifier is preferably a direct reaction product of fatty acid and triethanolamine.

The inorganic nanoparticle stabilizer is preferably white carbon black, superfine calcium carbonate, bentonite gel, attapulgite gel or a mixture thereof in any proportion; more preferably white carbon black and attapulgite gel.

In the above preparation method of solid paraffin lubricant for drilling fluid, in step (2), the components are preferably stirred at 80-100° C. and 200-500 rpm for 20-40 minutes.

The characteristic water-soluble polymer material with fluid loss reducing effect is preferably silicone oil grafted starch (SiM), cellulose grafted starch (PPS), polyacrylonitrile ammonium salt (NH ₄ PAN ), poly(acrylonitrile-acrylamide ) ammonium salt (double polyammonium salt) (HMP-21), lignite resin (SPNH), sulfonated lignite (SMC) or a mixture thereof in any proportion; PPS is further preferred, because PPS has a fibrous structure, making oil-in-water type The paraffin emulsion particles can penetrate into it, and the solid lubricant with better lubricating performance can be obtained through semi-dry process, drying and pulverization.

In the above preparation method of solid paraffin lubricant for drilling fluid, the components in step (5) are preferably dried at 70-90°C.

According to the second aspect of the present invention, there is provided a solid paraffin lubricant for drilling fluid prepared according to the above method, wherein the solid lubricant comprises the following components by weight: 50-80 parts of characteristic polymer material , preferably 55-75 parts, 20-50 parts of liquid lubricant, preferably 25-45 parts; wherein:

The liquid lubricant comprises the following components by weight: 30-50 parts of oil phase, 0.5-2 parts of sodium hydroxide, 2-6 parts of composite emulsifier, 0.1-1 part of stabilizer, and 41-67.4 parts of water phase , based on 100 parts by weight of liquid lubricant;

in:

The oily phase is mineral oil and waxy matter;

The composite emulsifier is a polyol lipid nonionic surfactant;

The stabilizer is an inorganic nanoparticle;

The characteristic polymer material is a water-soluble polymer material with fluid loss reducing function.

According to a preferred embodiment of the present invention, in the solid paraffin lubricant for drilling fluid, the characteristic polymer material is 60-70 parts by weight, and the liquid lubricant is 30-40 parts by weight.

According to a preferred embodiment of the present invention, in the solid paraffin lubricant for drilling fluid, the liquid lubricant contains the following components in weight ratio: 40-45 parts of oil phase, 0.8-1 part of sodium hydroxide, compound emulsification 3-5 parts of agent, 0.5-0.8 parts of stabilizer, 48.2-55.7 parts of water phase, based on 100 parts by weight of liquid lubricant.

According to a preferred embodiment of the present invention, in the solid paraffin lubricant for drilling fluid, the preferred 46# white oil of the mineral oil; and/or the preferred wax paste of the waxy substance; the non-ionic surface of the polyol lipid The preferred Span80 and Twe en80 active agent; And/or the preferred white carbon black and attapulgite gel of the inorganic nano particle stabilizer; And/or the preferred PPS with the characteristic water-soluble macromolecular material of fluid loss reducing effect .

The appearance of the solid paraffin lubricant for drilling fluid prepared by the method of the invention is a light brown solid powder without peculiar smell, and the lubricant is dispersed in the drilling fluid as particles of nanometer size.

The solid paraffin lubricant for drilling fluid of the present invention can control both the adhesion coefficient reduction rate and the friction coefficient reduction rate at 55%-90%, and the comprehensive lubricating performance is good.

The beneficial effect of the present invention compared with prior art is:

(1) Wax paste, one of the raw materials, is easier to emulsify, and the prepared emulsion is uniform and stable; PPS, one of the characteristic water-soluble polymer materials, has a fibrous structure, so that the oil-in-water paraffin emulsion particles can be immersed in it. process, drying and crushing to obtain a solid lubricant with better lubricating properties.

(2) It has excellent comprehensive lubrication performance, can effectively reduce the adhesion coefficient and friction coefficient of drilling fluid base slurry, and play a role in lubricating drilling tools and well walls.

(3) It can form an oil film protection layer in the borehole wall, prevent drilling fluid and its filtrate from entering the formation, seal formation fissures, prevent the borehole wall from collapsing, and have a good performance in protecting the oil reservoir.

(4) It has good high temperature resistance, salt resistance, easy dispersion, low fluorescence, low toxicity, and meets the requirements of environmental protection.

(5) It has good high-temperature and high-pressure fluid loss reduction performance, and the high-temperature and high-pressure fluid loss reduction rate of 4% brine-based slurry, 120°C, and 3.5MPa pressure difference reaches more than 50%.

(6) The use under low temperature conditions will not be affected, effectively preventing the traditional liquid paraffin lubricant from layering and solidifying due to long-term storage and easy to freeze in winter. It has the characteristics of convenient transportation and storage, and saves packaging and transportation costs.

Description of drawings

Figure 1: The degree of influence of different additions of solid paraffin lubricant on the reduction rate of adhesion coefficient and friction coefficient of base slurry;

Figure 2: Comparison of scanning electron microscope photos between characteristic polymer materials and solid paraffin lubricants: (a) characteristic polymers; (b) solid paraffin lubricants of the present invention;

Figure 3: Laser particle size distribution map of paraffin wax lubricant.

Detailed ways

The content of the present invention is further explained or illustrated by the following examples. However, the provided examples should not be construed as limiting the protection scope of the present invention.

performance evaluation

The adhesion coefficient reduction rate, friction coefficient reduction rate, and high temperature and high pressure fluid loss reduction measurement experiment of the lubricant involved in the present invention are as follows:

1. Measurement of adhesion coefficient reduction rate:

Add 26g of calcareous sodium bentonite to 500mL of distilled water, stir on a high-speed stirrer at a speed of 10,000 rpm for 20 minutes, and then age in airtight conditions at room temperature for 16 hours to obtain a freshwater base slurry with a soil content of 5.2%. During the measurement, the 5.2% freshwater base slurry that has been aged for 16 hours is added with a lubricant according to a certain ratio, and stirred at a high speed for 20 minutes. The measurement adopts the NF-1 type adhesion coefficient tester. Pour the configured mud into the liquid cup, apply a pressure of 3.5MPa for 30 minutes, then measure the fluid loss at this time, and apply a pressure of 3.5MPa to the adhesion plate, and measure the torque with a torque meter after 5 minutes of pressure, and then calculate ,Calculated as follows:

f=M×0.845×10 ^-2

Where: f is the adhesion coefficient M is the torque (Nm)

Calculation of adhesion coefficient reduction rate:

△K _f = (f ₁ - f ₂ )/f ₁ × 100%

In the formula: f ₁ is the adhesion coefficient of the base slurry itself, and f ₂ is the adhesion coefficient of the mud after adding a certain amount of lubricant.

2. Measurement of friction coefficient reduction rate:

Add 26g of calcareous sodium bentonite to 500mL of distilled water, stir on a high-speed stirrer at a speed of 10,000 rpm for 20 minutes, and then age in airtight conditions at room temperature for 16 hours to obtain a freshwater base slurry with a soil content of 5.2%. Use the E-P extreme pressure lubrication instrument to measure the friction coefficient of the base slurry, distilled water and base slurry with lubricant, add the lubricant to the aged 5.2% fresh water base slurry according to a certain ratio, and use the GJ-2S type Stir at high speed with a high-speed mixer for 5 minutes, pour the liquid into the sample cup of the lubrication meter, the test conditions are 60r/min, the test pressure is 1.5MPa, the test time is 5 minutes, and the reading is taken after 5 minutes. Correction factor=34/distilled water reading, friction coefficient f=0.01×reading×correction factor.

△f=(f ₁ -f ₂ )/f ₁ ×100%

In the formula: f ₁ is the friction coefficient of the base slurry itself, and f ₂ is the friction coefficient of the mud after adding a certain amount of lubricant.

3. High temperature and high pressure filtration loss:

(1) Freshwater base slurry: add 24g of calcium sodium bentonite to 400mL of deionized water, stir on a high-speed stirrer at a speed of 10,000 rpm for 20 minutes, and then age in a closed room at room temperature for 16 hours to obtain 6.0% freshwater base slurry. pulp. When measuring, the base slurry that has been aged for 16 hours is added with lubricant according to a certain ratio, and stirred at high speed for 20 minutes. The measurement uses GGS 42-2 high temperature and high pressure filter loss instrument. Pour the configured mud into the filter press, pressurize to 3.5Mpa, raise the temperature to 120°C, open the upper and lower valve stems while timing, and record the filtrate loss for 30 minutes.

Water loss rate under high temperature and high pressure = (V ₁ -V ₂ )/V ₁ × 100%

In the formula: V ₁ is the fluid loss of the filtrate of the base pulp itself, and V ₂ is the fluid loss of the filtrate after adding a certain amount of lubricant.

(2) Salt water-based slurry: add 16g Na Cl to 400mL deionized water, stir at 10000 rpm for 20min at high speed, then add 24g of calcium sodium bentonite, stir at 10000rpm on a high-speed stirrer for 20min, then Airtightly aged at room temperature for 16 hours to obtain a brine-based slurry with a soil content of 6.0%. When measuring, the base slurry that has been aged for 16 hours is added with lubricant according to a certain ratio, and stirred at a high speed for 20 minutes. The measurement adopts GGS42-2 high temperature and high pressure filter loss meter. Pour the prepared mud into the filter press, pressurize to 3.5Mpa, raise the temperature to 120°C, open the upper and lower valve stems while timing, and record the filtrate loss for 30 minutes.

Water loss rate under high temperature and high pressure = (V ₁ -V ₂ )/V ₁ × 100%

In the formula: V ₁ is the fluid loss of the filtrate of the base pulp itself, and V ₂ is the fluid loss of the filtrate after adding a certain amount of lubricant.

Example 1

Lubricant components are as follows: all are parts by weight (unit: kilogram):

22.5 parts of white oil, 22.5 parts of wax paste, 1 part of sodium hydroxide, 4.7 parts of non-ionic surfactant Span 80 and Tween 80, 0.3 part of white carbon black, 49 parts of distilled water.

35 parts of characteristic water-soluble polymer PPS, get 65 parts of liquid lubricants prepared above.

Preparation method: Mix 22.5 parts of white oil, 22.5 parts of wax paste, 4.7 parts of non-ionic surfactants Span 80 and Tween80, 0.3 parts of white carbon black, and 49 parts of distilled water in a reactor, 85 ° C, 300 rpm Stir continuously for 20 minutes according to different conditions to obtain a liquid lubricant for drilling fluid. Mix 65 parts of the lubricant prepared above with 35 parts of PPS, uniformly impregnate at 80°C, dry and pulverize at a low temperature of 80°C to obtain solid paraffin lubricant for drilling fluid.

According to the above-mentioned product performance evaluation method, the solid paraffin lubricant product of Example 1 and two commercially available emulsion-type and solid-type lubricants were evaluated respectively, and the results are shown in Table 1.

Table 1. Comparative evaluation results of the comprehensive lubricating properties of the products of the embodiment (5.2% fresh water bentonite base slurry)

Fig. 1 is a graph showing the degree of influence of different additions of the prepared solid paraffin lubricant on the reduction rate of the adhesion coefficient and the reduction rate of the friction coefficient of the base slurry.

Example 2

The method is basically as described in Example 1, the difference is:

The lubricant components are as follows, all in parts by weight (unit: kilogram):

20 parts of white oil, 20 parts of wax paste, 1 part of sodium hydroxide, 805 parts of nonionic surfactant Span80 and Tween, 0.5 part of superfine calcium carbonate, and 53.5 parts of distilled water.

30 parts of characteristic polymer PPS, take 70 parts of liquid lubricant prepared above.

Preparation method: Mix the above components uniformly in a reactor, and continuously stir for 60 minutes at 75°C and 100 rpm to obtain a liquid lubricant for drilling fluid. Take 70 parts of the above-prepared lubricant and 30 parts of PPS, uniformly soak at 70°C, dry and pulverize at 100°C to obtain solid paraffin lubricant for drilling fluid.

According to the above-mentioned product performance evaluation method, the solid paraffin lubricant product of Example 2 and two commercially available emulsion-type and solid-type lubricants were evaluated respectively, and the results are shown in Table 2.

Table 2 Comparative evaluation results of high temperature and high pressure fluid loss reduction performance of the products of the examples (6.0% fresh water and salt water (4.0%) base slurry)

Example 3

Method is substantially as described in embodiment 1 or 2, the difference is:

Lubricant components are as follows: all are parts by weight (unit: kilogram):

20 parts of white oil, 25 parts of wax paste, 1 part of sodium hydroxide, 5 parts of nonionic surfactant Span80 and Tween80, 0.6 part of attapulgite gel, 48.4 parts of distilled water.

35 parts of characteristic polymer PPS, get 65 parts of liquid lubricants prepared above.

Preparation method: Mix the above components uniformly in a reactor, and continuously stir for 15 minutes under the conditions of 90°C and 2000 rpm to obtain a liquid lubricant for drilling fluid. Take 65 parts of the above-prepared lubricant and 35 parts of PPS, soak them uniformly at 90°C, dry and pulverize them at a low temperature of 70°C, and obtain a solid paraffin lubricant for drilling fluid.

Figure 2 is a comparison of scanning electron micrographs of characteristic polymer materials and solid paraffin lubricant: (a) characteristic polymer; (b) solid paraffin lubricant prepared by the present invention. It can be seen from the figure that the attachment distribution of paraffin wax particles on the characteristic polymer material is 1-10 μm fine particles, which is convenient for it to play a lubricating role.

Fig. 3 is the laser particle size distribution diagram of the solid paraffin lubricant prepared by the present invention. It can be seen from the figure that the particle size of the characteristic polymer material loaded with wax particles is mainly distributed in tiny particles of 10-100 μm, which is convenient for it to play a lubricating role.

The present invention has been described in detail based on the above-mentioned embodiments. It should be noted that the above embodiments are only for illustrating the present invention. Without departing from the spirit and essence of the present invention, those skilled in the art can design various alternatives and improvements of the present invention, all of which should be understood as falling within the protection scope of the present invention.

Claims (13)

1. a preparation method for drilling fluid solid paraffin lubricant, it may further comprise the steps: (1) Weigh the following components by weight: 20-50 parts of oil phase, 0.5-2 parts of sodium hydroxide, 1-10 parts of composite emulsifier, 0.1-1 part of stabilizer, and 37-78.4 parts of water phase; (2) Mix the above-mentioned oil phase, sodium hydroxide, compound emulsifier, stabilizer and water phase into the reactor according to the stated component ratio, and stir for 15- 60min, obtained liquid lubricant; (3) Weigh the following components by weight: 50-80 parts of characteristic polymer material, 20-50 parts of liquid lubricant obtained in step (2); (4) impregnating and reacting the above-mentioned liquid lubricant and the characteristic macromolecule according to the component ratio; (5) After low-temperature drying and crushing at 60-100°C, a solid lubricant for drilling fluid is obtained; It is characterized by: The oily phase is mineral oil and waxy matter; The composite emulsifier is a polyol ester nonionic surfactant; The stabilizer is an inorganic nanoparticle, and the inorganic nanoparticle is white carbon black, ultrafine calcium carbonate, bentonite gel, attapulgite gel or a mixture thereof in any proportion; and/or The characteristic polymer material is a water-soluble polymer material with fluid loss reducing effect, and the water-soluble polymer material with fluid loss reducing effect is silicone oil grafted starch, cellulose grafted starch, polyacrylonitrile ammonium salt ( NH ₄ PAN), poly(acrylonitrile-acrylamide) ammonium salt, lignite resin (SPNH), sulfonated lignite (SMC) or a mixture thereof in any proportion. 2. according to the preparation method of claim 1, it is characterized in that, described mineral oil is liquid paraffin, 7# white oil, 10# white oil, 15# white oil, 26# white oil or 46# white oil; And/or The waxy substance is paraffin wax, wax paste, vegetable wax, wax recovered from wax patterns, and wax recovered from oil well wax removal operations. 3. according to the preparation method of claim 2, it is characterized in that, described mineral oil is 46# white oil, and described waxy thing is wax ointment. 4. according to the preparation method of claim 1 or 2, it is characterized in that, described polyol ester nonionic surfactant is Span and Tween series surfactant. 5. according to the preparation method of claim 4, it is characterized in that, described polyol ester nonionic surfactant is Span20, Span40, Span60 or Span80 and Tween20, Tween40, Tween60 or Tween80. 6. according to the preparation method of claim 5, it is characterized in that, described polyol ester nonionic surfactant is Span80 and Tween80. 7. The preparation method according to claim 1 or 2, characterized in that, the inorganic nanoparticle stabilizer is white carbon black and attapulgite gel. 8. The preparation method according to claim 1 or 2, characterized in that, the characteristic water-soluble polymer material having fluid loss reducing effect is cellulose grafted starch. 9. The preparation method according to claim 1 or 2, characterized in that, the components described in step (2) are stirred at 80-100°C and 200-500 rpm for 20-40min; and/or the components described in step (5) The above components are dried at 70-90°C. 10. The solid paraffin lubricant for drilling fluid prepared by the method according to one of claims 1 to 9, characterized in that, the solid lubricant is based on 100 parts by weight, and the components are: 50-80 parts of characteristic polymer materials , 20-50 parts of liquid lubricant; wherein: The liquid lubricant comprises the following components by weight: 30-50 parts of oil phase, 0.5-2 parts of sodium hydroxide, 2-6 parts of composite emulsifier, 0.1-1 part of stabilizer, and 41-67.4 parts of water phase , based on 100 parts by weight of liquid lubricant; in: The oily phase is mineral oil and waxy matter; The composite emulsifier is a polyol ester nonionic surfactant; The stabilizer is an inorganic nanoparticle, and the inorganic nanoparticle is white carbon black, superfine calcium carbonate, bentonite gel, attapulgite gel or a mixture thereof in any proportion; The characteristic polymer material is a water-soluble polymer material with fluid loss reducing effect, and the water-soluble polymer material with fluid loss reducing effect is silicone oil grafted starch, cellulose grafted starch, polyacrylonitrile ammonium salt ( NH4PAN), poly(acrylonitrile-acrylamide) ammonium salt, lignite resin (SPNH), sulfonated lignite (SMC) or a mixture thereof in any proportion. 11. The solid paraffin lubricant for drilling fluid according to claim 10, characterized in that, in 100 parts by weight, the solid lubricant comprises: 55-75 parts of characteristic polymer material, and 25-75 parts of liquid lubricant. 45 servings. 12. The solid paraffin lubricant for drilling fluid according to claim 10 or 11, characterized in that, the solid lubricant comprises: 60-70 parts by weight of a characteristic polymer material, 30-40 parts by weight of a liquid lubricant; and/or The liquid lubricant comprises the following components by weight: 40-45 parts of oil phase, 0.8-1 part of sodium hydroxide, 3-5 parts of compound emulsifier, 0.5-0.8 parts of stabilizer, and 48.2-55.7 parts of water phase , Based on 100 parts by weight of liquid lubricant. 13. according to the solid paraffin lubricant for drilling fluid of claim 10 or 11, it is characterized in that, described mineral oil is 46# white oil; And/or described waxy thing is wax ointment; Described polyol ester non- The ionic surfactant is Span80 and Tween80; and/or the inorganic nanoparticle stabilizer is white carbon black and attapulgite gel; and/or the characteristic water-soluble polymer material with fluid loss reducing effect is cellulose grafted starch.