CN117050735A - Main emulsifier for synthetic base drilling fluid and production method thereof - Google Patents

Abstract

The invention provides a main emulsifier for synthetic base drilling fluid and a production method thereof, belongs to the technical field of drilling fluid, and solves the problems of low production and preparation efficiency, low emulsification rate, poor electrical stability and the like of the conventional main emulsifier for synthetic base drilling fluid. The production method of the main emulsifier for the synthetic base drilling fluid comprises the following preparation steps: step one, preparing production; step two, primary mixing; step three, secondary mixing; step four, heat preservation and water removal and crystal maleic anhydride melting; step five, mixing for three times; step six, mixing four times, step seven, and cooling the finished product. The main emulsifier for the synthetic base drilling fluid has the advantages that the appearance, the emulsification rate and the electrical stability meet the technical indexes, the production method is reasonable in equipment layout, the production is performed in a flow line manner, the reaction is performed while the feeding is performed, the material conveying time is saved, the discharging is stable, the material injection waiting time is avoided, and the production is efficient; the material mixing and injection can be carried out according to the weight ratio of the materials, the material injection mixing ratio is stable, the material pumping and injection are uninterrupted, and the efficiency is high.

Description

A kind of main emulsifier for synthetic-based drilling fluid and its production method

Technical field

The invention belongs to the technical field of drilling fluids and relates to a method for producing a main emulsifier for synthetic-based drilling fluids, in particular to a main emulsifier for synthetic-based drilling fluids.

Background technique

Since the external phase is an oil phase, compared with water-based drilling fluids, oil-based drilling fluids have the advantages of good stability, strong shale inhibition, excellent temperature resistance, strong anti-pollution ability, and easy maintenance. Therefore, they are used in some difficult wells. and complex blocks are widely used. Oil-based drilling fluids can be divided into diesel-based drilling fluids, white oil-based drilling fluids and synthetic-based drilling fluids according to different base oils.

Oil-based drilling fluids formulated with diesel or white oil as base oil have problems such as affecting fluorescence logging, being highly biologically toxic, and damaging the environment. However, synthetic-based drilling fluids that use synthetic base oil as base oil retain the advantages of diesel-based and white oil-based drilling fluids. In addition to the advantages of liquid logging, it also has the advantages of not affecting fluorescence logging, strong environmental acceptability, and low biological toxicity. However, synthetic-based drilling fluid is essentially a type of oil-based drilling fluid, and its continuous phase is the oil phase (synthetic base). Therefore, during drilling, it is easy to cause changes in the wettability of drill cuttings, formations, etc., resulting in mud cake. Problems such as difficulty in removal and low cementing strength during cementing have become bottlenecks restricting the large-scale promotion and application of synthetic-based drilling fluids.

In today's technology, an issue that urgently needs to be improved in drilling fluids is how to improve the stability of the emulsion, especially in high-temperature service environments. During the drilling process, due to the high heat and high pressure generated by drilling friction, the emulsion will always face the adverse tendency of weakening or even completely failing the emulsification effect. Especially when drilling deep hot wells, the high temperature will easily cause the emulsion to lose its stability. Emulsifier is a very key raw material in the drilling fluid composition system. The quality of the emulsifier and its stability are the key to ensuring the balance of each dispersed phase in the drilling fluid emulsion composition system and long-term service reliability. elements. There are also great deficiencies in the research on the emulsification rate and electrical stability of emulsifiers in drilling fluids. Therefore, developing a main emulsifier for synthetic-based drilling fluid has become one of the current problems that need to be solved urgently.

After searching, for example, Chinese patent documents disclose an emulsifier for ultra-high temperature resistant oil-based drilling fluids and its preparation method and application [Application No.: 202210834249.7; Publication No.: CN115261000A]. The preparation method of the emulsifier includes the following steps: after deoxygenating vegetable oil fatty acid A through nitrogen, adding polyamines to perform a condensation reaction; then adding phenyl-containing anhydride to perform an acylation reaction; and finally adding chlorosulfonic acid to the reaction system to perform the reaction. , to obtain product I; after deoxygenating the vegetable oil fatty acid B by nitrogen, adding acid anhydride to react, obtaining product II; mixing the obtained product I and product II to obtain an emulsifier for ultra-high temperature resistant oil-based drilling fluid. Although the anti-ultra-high temperature emulsifier of this invention has stronger adsorption capacity at the oil-water interface, the emulsifier produced by it has relatively low emulsification rate and electrical stability. In addition, the preparation method is complicated, which is not conducive to stable and rapid production and processing of emulsifiers.

Therefore, we propose a main emulsifier for synthetic-based drilling fluid and its production method. The production method and equipment are reasonably laid out to form an assembly line production. It is added, stirred, reacted and output at the same time, which saves the feeding time, and the discharge is stable without injection. The waiting time for materials is high, and the production is efficient; the proportions can be carried out according to the weight ratio of the materials, the injection ratio is stable, the material pumping and injection are uninterrupted, and the efficiency is high; the appearance, emulsification rate, and electrical stability of the main emulsifier for synthetic-based drilling fluids All meet the technical specifications.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned problems in the existing technology and propose a main emulsifier for synthetic-based drilling fluid and its production method. The technical problem to be solved by the invention is: how to achieve efficient and stable production and preparation of synthetic-based drilling fluids. Use the main emulsifier in the liquid, and ensure that the emulsification rate and electrical stability of the main emulsifier are good.

The object of the present invention can be achieved through the following technical solutions:

A main emulsifier for synthetic-based drilling fluid and its production method, including the following processing steps:

Step 1, production preparation: clean the production site, determine the product production method and formula, check whether the machinery and equipment can operate normally, and prepare raw materials according to the ratio;

Step 2, one-time mixing: start the first conveying agitator, and add emulsifier A, emulsifier B, and emulsifier C in the corresponding storage tank into the first conveying agitator in proportion through several injection pumps. , add and stir while reacting and outputting. After thorough mixing under normal temperature conditions, the entry time is 0h, the discharge time is 2h, the reaction time is 2h, and the No. I emulsion is obtained. The discharged No. I emulsion is calculated according to the No. I Based on the density and mass of the emulsion and the required mixing ratio for secondary mixing, calculate and design the diameter and number of feed tubes;

Step 3, secondary mixing: start the second conveying agitator, adjust the temperature of the second conveying agitator through the thermal oil furnace to rise to 135°C, and the No. I emulsion enters the second conveying agitator in proportion, and at the same time, it passes through the injection The material pump adds the emulsifier D inside the storage tank into the second conveying agitator in proportion, stirring and reacting while adding and outputting, the stirring reaction is 1.5h, the entry is the 0th hour, the discharge is the 1.5h, the reaction The duration is 1.5h, and emulsion No. II is obtained;

Step 4: Remove water from thermal insulation and melt crystalline maleic anhydride: No. II emulsion is introduced into the interior of the thermal insulation feed box. There is a heat conduction box on the outside of the thermal insulation feed box. There is a liquefied storage tank on the outside of the heat conduction box. Through the thermal oil furnace and heat conduction Cooperate with the box, adjust the temperature of the heat preservation feed box to 170°C, time the heat preservation and water removal for 2 hours, the time of entry is the 0th hour, and the time of discharge is the 2h, and the No. II emulsion with water removal is obtained. The liquefied storage tank is heated by the heat conduction box, so that The crystalline maleic anhydride inside the liquefied storage tank melts to obtain liquid maleic anhydride;

Step five, three times of mixing: start the third conveying agitator, raise the temperature of the third conveying agitator to 150°C through the thermal oil furnace, and remove the water of No. II emulsion and liquid maleic anhydride through the injection pump at the same time in proportion Add to the third conveying mixer, add and stir while reacting and outputting. The entry time is 0h, the discharge time is 2h, the stirring and heat preservation time is 2h, and the emulsion No. II I is obtained, and the emulsion No. II I is discharged. , calculate and design the diameter and quantity of the feed tube according to the density and mass of the No. III emulsion and the required mixing ratio of the four mixings;

Step 6, four times of mixing: start the fourth conveying agitator, raise the temperature of the fourth conveying agitator to 150°C through a thermal oil furnace, add No. II emulsion into the fourth conveying agitator in proportion, and add it to the fourth conveying agitator through injection. The material pump adds the white oil inside the corresponding storage tank to the fourth conveying agitator in proportion, and stirs and reacts while adding and outputting. After a full reaction of 1-2 hours, the entry time is 0h, and the discharge time is 1-h. After 2 hours, emulsion No. IV was obtained;

Step 7: Cooling of finished product: Transport the No. IV emulsion to the cooling tower. After cooling, the main emulsifier for synthetic-based drilling fluid is obtained.

In the second step, emulsifier A is an alkyl fatty alcohol amide nonionic surfactant, emulsifier B is a fatty acid ester, emulsifier C is a sulfate, and the weight of emulsifier A, emulsifier B, and emulsifier C is The mixing ratio is 1:2:2.

In the third step, emulsifier D is 1,5-diaminopentane, and the weight mixing ratio of emulsion No. I to emulsifier D is 12:1.

In the fifth step, the weight mixing ratio of No. II emulsion and liquid maleic anhydride is 20:1.

In the step six, the weight mixing ratio of No. III emulsion and white oil is 10:1.

The unit weight of the material discharged by the injection pump is the product of the pumped volume and the density of the pumped material, and the total weight of the material discharged by the injection pump is the product of the extruded unit weight and the extrusion time.

A method for producing a main emulsifier for synthetic-based drilling fluids, including a frame. The top view of the frame is in the shape of a symmetrical pentagon. Two conveying agitators are provided on both sides of the frame. There are two storage tanks on the other three sides. The upper end of the frame is equipped with a thermal oil furnace. The inside of the frame is equipped with a cooling tower and an insulation channel box. Four conveying mixers are connected to the insulation channel box in sequence, and the connecting pipes There is an injection pump on the top of the frame. There is a heat conduction box on the outside of the thermal insulation feed box. There is a liquefaction storage tank on the outside of the heat conduction box. There is a thermal oil furnace on the top of the frame. The insulation channel box is connected between the two conveying mixers in the middle. There is an injection pump between the first conveying agitator and three of the storage tanks. There are injection pumps between the other three conveying agitators and one storage tank respectively. The last conveying agitator is between There is an injection pump between the cooling towers, and the thermal oil furnace is connected to the second, third and fourth delivery agitators, one of the storage tanks and the heat transfer box respectively.

Using the above structure, several storage tanks are respectively equipped with emulsifier A, emulsifier B, emulsifier C, emulsifier D, crystalline maleic anhydride and white oil.

Start the first conveying mixer, and add the emulsifier A, emulsifier B, and emulsifier C in the corresponding storage tanks into the first conveying mixer in proportion through several injection pumps, stirring while adding. The reaction is output at the same time. After thorough mixing under normal temperature conditions, the entry time is 0h, the discharge time is 2h, the reaction time is 2h, and the No. I emulsion is obtained. The discharged No. I emulsion is calculated according to the density and quality of the No. I emulsion. As well as the required mixing ratio for secondary mixing, calculate and design the diameter and number of feed tubes;

Start the second conveying agitator, and adjust the temperature of the second conveying agitator to 135°C through the thermal oil furnace. The No. 1 emulsion enters the second conveying agitator in proportion, and at the same time, the inside of the storage tank is filled through the injection pump The emulsifier D is added in proportion to the second conveying mixer, and is added and stirred while reacting and outputting. The stirring reaction is 1.5h. The time of entry is the 0th hour, the time of discharge is the 1.5h, and the reaction time is 1.5h to obtain II. emulsion;

The No. II emulsion is introduced into the interior of the thermal insulation feed box. The thermal oil furnace cooperates with the thermal conductive box to adjust the temperature of the thermal insulation feed box to 170°C. Time the insulation and water removal for 2 hours. The time of entry is the 0th hour and the time of discharge is the 2h. We get After removing water from the No. II emulsion, the liquefied storage tank is heated by the heat conduction box to melt the crystalline maleic anhydride inside the liquefied storage tank to obtain liquid maleic anhydride;

Start the third conveying agitator, raise the temperature of the third conveying agitator to 150°C through a thermal oil furnace, and add the dehydrated No. II emulsion and liquid maleic anhydride to the third conveying mixer in proportion through the injection pump. In the device, add and stir while reacting and outputting. The time of entry is the 0th hour, the time of discharge is the 2h, the stirring and heat preservation time is 2h, and the No. II emulsion is obtained. The discharged No. II emulsion is emulsified according to the No. II I emulsion. According to the density and mass of the liquid and the required mixing ratio of the four mixings, calculate and design the diameter and quantity of the feed tubes;

Start the fourth conveying agitator, raise the temperature of the fourth conveying agitator to 150°C through the thermal oil furnace, add the No. II emulsion into the fourth conveying agitator in proportion, and pump the corresponding stored material through the injection pump. The white oil inside the tank is added to the fourth conveying agitator in proportion. It is added and stirred while reacting and outputting. After a full reaction of 1-2 hours, the time of entry is hour 0 and the time of discharge is hour 1-2, and emulsion IV is obtained. ;

Cooling of finished product: Transport the No. IV emulsion to the cooling tower. After cooling, the main emulsifier for synthetic-based drilling fluid is obtained.

The rack includes a rack main body, a plurality of foot cups are fixed at the bottom of the rack main body, four mounting plates are fixed on each side of the rack main body, two mounting plates are provided on the upper side, and two mounting plates are provided on the lower side. Mounting plate, the upper end of the main body of the frame is fixed with a fixed top plate, the conveying mixer and storage tank are respectively fixed on the two mounting plates at corresponding positions, the thermal oil furnace is set on the upper end of the fixed top plate, and the insulation channel box is fixed on the fixed top plate. At the lower end, the cooling tower is fixed inside the main body of the rack.

Using the above structure, several foot cups are used to adjust the level of the main body of the rack, and the mounting plate is used to install and fix the conveying mixer and storage tank. The layout of each component is reasonable to meet the needs of use.

The conveying mixer includes a conveying mixing box, and an oil inlet pipe and an oil outlet pipe are respectively provided on both sides of the conveying mixing box. The oil inlet pipe and the oil outlet pipe are respectively connected with the oil outlet end and the oil inlet end of the thermal oil furnace. The conveying mixing box is fixed with Power motor, S-shaped conveying and mixing pipe fittings are fixed inside the conveying and mixing box. Both ends of the conveying and mixing pipe fittings respectively extend out of the conveying mixing box, and both ends of the conveying and mixing pipe fittings are detachably provided with screw barrels, and the conveying and mixing pipe fittings There is a sprocket pair between the transmission shaft and the transmission shaft of the power motor.

Using the above structure, the heat-conducting oil furnace enters the delivery mixing box from the oil outlet through the oil inlet pipe, and controls and adjusts the stability inside the delivery mixer. The cold oil is discharged from the oil outlet pipe and flows back to the inside of the heat-conducting oil furnace for recycling and power generation. The conveying shaft of the motor drives the conveying and mixing pipe fittings to rotate through the sprocket pair. Each raw material enters the conveying and mixing pipe fittings from the screw barrel at the feed end in proportion. It is added, stirred, reacted, and output, that is, discharged from the screw barrel at the discharge end.

The conveying and mixing pipe fittings include two symmetrical S-shaped conveying and stirring pipes. The two symmetrical S-shaped conveying and mixing pipes form a closed whole pipe. The whole pipe is fixed inside the conveying and mixing box, and the inside of the conveying and mixing pipe There are a number of fixed frames. The fixed frames of the straight section of the conveying mixing pipe are provided with long transmission shafts. The fixed frames of the curved sections of the conveying mixing pipe are provided with three short transmission shafts. There is a gap between the long transmission shaft and the short transmission shaft. , several transmission short shafts are connected with universal joints, and there are several groups of mixing and cutting blades, stirring blades and conveying agitation frames on the long transmission shaft. The transmission short shafts on both sides of the curved section of the conveying mixing pipe Stirring blades are fixed on them, stirring and cutting blades are fixed on the short transmission shaft in the middle of the curved section of the conveying and stirring pipe, and external threads are provided on the outside of the end of the conveying and stirring pipe.

Using the above structure, two symmetrical S-shaped conveying and mixing tubes form a closed whole tube, which is easy to install and disassemble. The fixed frame, long transmission shaft and short transmission shaft rotate. The long transmission shaft rotates to drive the mixing and cutting blades at the corresponding positions. The agitating blades and conveying agitating frame rotate to perform cutting, stirring and conveying. The mixing is sufficient and the material can be stably conveyed at the same time. The long transmission shaft drives the short transmission shaft to rotate through the universal joint, and the short transmission shaft drives through the universal joint. The transmission short shaft rotates, thereby driving the stirring blades and mixing and cutting blades at the corresponding positions to rotate, cutting, stirring and conveying materials. The mixing is sufficient and the materials can be transported stably at the same time.

The inside of the threaded barrel is provided with internal threads, and the internal threads match the external threads. A sealed bearing seat is fixed on the threaded barrel. The ends of the long transmission shafts on both sides penetrate the sealed bearing seats. The long transmission shaft at the feed end There is a sprocket pair between the end of the shaft and the output shaft of the power motor. A number of evenly distributed material guide tubes are fixed on the threaded barrel. A multi-channel solenoid valve is installed between the material guide tubes and the corresponding injection pump. .

With the above structure, the internal thread and the external thread are matched to install the threaded barrel. The ends of the long transmission shafts on both sides penetrate the sealed bearing seats, which facilitates the rotation of the long transmission shaft and sealing. Several guides evenly distributed around the circumference. Feed pipe, according to the density and quality of each raw material, each emulsion, and the required mixing ratio, calculate and design the diameter and quantity of the feed pipe, and the multi-channel solenoid valve between the feed pipe and the corresponding injection pump. The output shaft of the power motor drives the end of the long transmission shaft of the feed end to rotate through the sprocket pair for stable rotation, mixing, mixing and transportation.

The fixed frame is arc-shaped, the upper end surface of the fixed frame is lower than the upper end surface of the conveying mixing pipe, and an engaging groove is formed between the upper end faces of the two conveying mixing pipe fixed frames. The fixed frame includes a fixed frame body, and the fixed frame The body is engaged inside the fixed frame. Symmetrical blocking locking blocks are fixed on both sides of the fixed frame body. The blocking locking blocks are engaged inside the engaging grooves at corresponding positions. The limited bearing seat is fixed inside the fixed frame body. The transmission length The shaft and the transmission short shaft are respectively fixed inside the limit bearing seats at corresponding positions.

With the above structure, the upper end surface of the fixed frame is lower than the upper end surface of the conveying and stirring pipe, and an engaging groove is formed between the upper end surfaces of the fixed frames of the two conveying and mixing pipes for engaging and resisting the locking block, that is, resisting the locking block engagement. Inside the engaging grooves at the corresponding positions, the long transmission shaft and the short transmission shaft are respectively fixed inside the limit bearing seats at the corresponding positions, which facilitates the stable rotation of the long transmission shaft and the short transmission shaft.

A heat conduction box is fixed inside the liquefaction storage tank, and an insulation feed box is fixed inside the heat conduction box. The upper ends of the liquefaction storage box and the insulation feed box are open, and an oil inlet joint is provided on the upper end of one side of the heat conduction box to conduct heat. There is an oil outlet joint at the lower end of the other side of the tank. The oil inlet joint and the oil outlet joint are connected to the oil outlet end and the oil inlet end of the thermal oil furnace respectively. The oil inlet joint and the oil outlet joint run through the liquefied storage tank respectively. The liquefied storage tank There is a liquefaction discharge pipe at the lower end, which is connected to the corresponding injection pump. There is a discharge pipe at the lower end of the insulated feed box. The discharge pipe runs through the liquefaction storage tank and the heat conduction box. The discharge pipe is connected to the corresponding injection pump. The injection pump is connected, and the interior of the insulated feed box is equipped with a number of alternately distributed oil guide trough plates.

Using the above structure, the crystalline maleic anhydride is installed inside the liquefied storage tank. The thermal oil furnace sends the hot oil from the oil outlet end through the oil inlet joint into the heat transfer tank, controls and adjusts the stability inside the insulation feed tank, and the cold oil is discharged from the oil outlet joint. , through reflux to the inside of the thermal oil furnace for recycling, the excess heat is dissipated to the inside of the liquefaction storage tank, and the crystal maleic anhydride is melted to obtain liquid maleic anhydride. The liquid maleic anhydride is discharged from the liquefaction discharge pipe and passes through the corresponding injection The material pump injects into the interior of the corresponding screw joint barrel, and the mixed emulsion (No. II emulsion) inside the thermal insulation feed box flows along several alternately distributed oil guide groove plates. It enters at 0h and discharges at 2h. During this process, the No. II emulsion is kept warm and dewatered for 2 hours to obtain the dewatered No. II emulsion, which is discharged from the discharge pipe and injected into the interior of the corresponding screw barrel through the corresponding injection pump.

A main emulsifier for synthetic-based drilling fluids, including the main emulsifier for synthetic-based drilling fluids processed by the above production method.

Compared with the existing technology, the main emulsifier for synthetic-based drilling fluid and its production method have the following advantages:

The production method of the main emulsifier for synthetic-based drilling fluid is to install and fix each component in a rack, with a reasonable layout to meet the needs of use; through the cooperation of several conveying mixers and thermal insulation channel boxes, a pipeline production is formed, adding, stirring and reacting Output, saving conveying time, stable discharging, no waiting time for filling, and efficient production; the conveying mixer cooperates with the conveying mixing pipe fittings and the screw barrel to proportion according to the weight ratio of the materials, and the filling proportion is stable. The pumping and injection are uninterrupted and the efficiency is high; through the cooperation of the liquefaction storage box, the heat conduction box and the insulation feed box, the heat conduction box heats the liquefaction storage box and the insulation feed box, which can quickly liquefy the crystalline maleic anhydride and obtain Liquid crystal maleic anhydride can also quickly stabilize and remove water from emulsions. The thermal oil furnace cooperates with several conveying agitators and thermal conduction boxes to achieve stable and adjustable temperature, ensuring a stable temperature state of mixing.

The appearance, emulsification rate and electrical stability of the main emulsifier used in this synthetic-based drilling fluid all meet the technical specifications.

Description of the drawings

Figure 1 is a flow chart of the production method of the present invention.

Figure 2 is a schematic three-dimensional structural diagram of the present invention.

Figure 3 is a schematic three-dimensional structural diagram of some components in the present invention.

Figure 4 is a schematic front structural view of the conveying agitator in the present invention.

FIG. 5 is an enlarged structural schematic diagram of position A in FIG. 4 .

Figure 6 is a schematic cross-sectional structural view of the conveying agitator in the present invention.

Figure 7 is a schematic cross-sectional front structural view of the conveying and stirring pipe fittings in the present invention.

FIG. 8 is an enlarged structural schematic diagram of position B in FIG. 7 .

Fig. 9 is a schematic cutaway three-dimensional structural diagram of the conveying and stirring pipe fittings in the present invention.

Figure 10 is a schematic three-dimensional structural diagram of the conveying and stirring pipe in the present invention.

Figure 11 is a schematic three-dimensional structural diagram of the fixing bracket in the present invention.

Figure 12 is a schematic cross-sectional structural view of the heat-insulating feed box in the present invention.

Figure 13 is a table of technical requirements for the main emulsifier used in synthetic-based drilling fluids in the present invention.

Fig. 14 is a visual measurement table of appearance in the present invention.

Fig. 15 is a measurement table of the emulsification rate in the present invention.

Fig. 16 is a measurement table of the electrical stability of the present invention.

In the picture, 1. Rack; 2. Conveying mixer; 3. Thermal oil furnace; 4. Storage tank; 5. Cooling tower; 6. Foot cup; 7. Rack body; 8. Mounting plate; 9. Fixed Top plate; 10. Conveying mixing box; 11. Oil inlet pipe; 12. Power motor; 13. Sprocket pair; 14. Transmission long shaft; 15. Feed tube; 16. Screw joint; 17. Conveying mixing pipe; 18. Oil outlet pipe; 19. External thread; 20. Flange plate; 21. Locking through hole; 22. Universal joint; 23. Transmission short shaft; 24. Mixing and cutting blades; 25. Stirring blades; 26. Conveying and stirring frame ; 27. Clamping frame; 28. Fixed frame; 29. Fixed frame body; 30. Resistance locking block; 31. Limit bearing seat; 32. Liquefied storage tank; 33. Heat transfer box; 34. Oil inlet joint; 35. Thermal insulation feed box; 36. Oil guide plate; 37. Oil outlet joint; 38. Discharge pipe; 39. Liquefaction discharge pipe.

Detailed ways

The following are specific embodiments of the present invention combined with the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in Figure 1, the production method of the main emulsifier for synthetic-based drilling fluid includes the following processing steps:

Step 1, production preparation: clean the production site, determine the product production method and formula, check whether the machinery and equipment can operate normally, and prepare raw materials according to the ratio;

Step 2, one-time mixing: start the first conveying agitator, and add emulsifier A, emulsifier B, and emulsifier C in the corresponding storage tank into the first conveying agitator in proportion through several injection pumps. , add and stir while reacting and outputting. After thorough mixing under normal temperature conditions, the entry time is 0h, the discharge time is 2h, the reaction time is 2h, and the No. I emulsion is obtained. The discharged No. I emulsion is calculated according to the No. I Based on the density and mass of the emulsion and the required mixing ratio for secondary mixing, calculate and design the diameter and number of feed tubes;

Step 3, secondary mixing: start the second conveying agitator, adjust the temperature of the second conveying agitator through the thermal oil furnace to rise to 135°C, and the No. I emulsion enters the second conveying agitator in proportion, and at the same time, it passes through the injection The material pump adds the emulsifier D inside the storage tank into the second conveying agitator in proportion, stirring and reacting while adding and outputting, the stirring reaction is 1.5h, the entry is the 0th hour, the discharge is the 1.5h, the reaction The duration is 1.5h, and emulsion No. II is obtained;

Step 4: Remove water from thermal insulation and melt crystalline maleic anhydride: No. II emulsion is introduced into the interior of the thermal insulation feed box. There is a heat conduction box on the outside of the thermal insulation feed box. There is a liquefied storage tank on the outside of the heat conduction box. Through the thermal oil furnace and heat conduction Cooperate with the box, adjust the temperature of the heat preservation feed box to 170°C, time the heat preservation and water removal for 2 hours, the time of entry is the 0th hour, and the time of discharge is the 2h, and the No. II emulsion with water removal is obtained. The liquefied storage tank is heated by the heat conduction box, so that The crystalline maleic anhydride inside the liquefied storage tank melts to obtain liquid maleic anhydride;

Step five, three times of mixing: start the third conveying agitator, raise the temperature of the third conveying agitator to 150°C through the thermal oil furnace, and remove the water of No. II emulsion and liquid maleic anhydride through the injection pump at the same time in proportion Add to the third conveying mixer, add and stir while reacting and outputting. The entry time is 0h, the discharge time is 2h, the stirring and heat preservation time is 2h, and the emulsion No. II I is obtained, and the emulsion No. II I is discharged. , calculate and design the diameter and quantity of the feed tube according to the density and mass of the No. III emulsion and the required mixing ratio of the four mixings;

Step 6, four times of mixing: start the fourth conveying agitator, raise the temperature of the fourth conveying agitator to 150°C through a thermal oil furnace, add No. II emulsion into the fourth conveying agitator in proportion, and add it to the fourth conveying agitator through injection. The material pump adds the white oil inside the corresponding storage tank to the fourth conveying agitator in proportion, and stirs and reacts while adding and outputting. After a full reaction of 1-2 hours, the entry time is 0h, and the discharge time is 1-h. After 2 hours, emulsion No. IV was obtained;

Step 7: Cooling of finished product: Transport the No. IV emulsion to the cooling tower. After cooling, the main emulsifier for synthetic-based drilling fluid is obtained.

In step two, emulsifier A is an alkyl fatty alcohol amide nonionic surfactant, emulsifier B is a fatty acid ester, emulsifier C is a sulfate, and the weight mixing ratio of emulsifier A to emulsifier B and emulsifier C is It is 1:2:2.

In step three, emulsifier D is 1,5-diaminopentane, and the weight mixing ratio of emulsion No. I to emulsifier D is 12:1.

In step five, the weight mixing ratio of No. II emulsion and liquid maleic anhydride is 20:1.

In step six, the weight mixing ratio of No. II emulsion and white oil is 10:1.

The unit weight of the material discharged by the injection pump is the product of the pumped volume and the density of the pumped material. The total weight of the material discharged by the injection pump is the product of the extruded unit weight and the extrusion time.

As shown in Figures 2 to 11, the production method of the main emulsifier for synthetic-based drilling fluids includes a frame 1. The top view of the frame 1 is in the shape of a symmetrical pentagon. Both sides of the frame 1 are provided with Two conveying mixers 2, two storage tanks 4 are provided on the other three sides of the frame 1, a thermal oil furnace 3 is provided at the upper end of the frame 1, and a cooling tower 5 and a thermal insulation channel are provided inside the frame 1 box, the four conveying mixers 2 are connected to the insulation channel box in sequence, and the connecting pipes are equipped with injection pumps. The outside of the insulation feed box 35 is provided with a heat conduction box 33, and the outside of the heat conduction box 33 is provided with a liquefaction storage box 32. The machine The top of the frame 1 is equipped with a thermal oil furnace 3. The insulation channel box is connected between the two middle conveying agitators 2. There is an injection pump between the first conveying agitator 2 and three of the storage tanks 4. The remaining An injection pump is arranged between the three conveying agitators 2 and a storage tank 4 respectively. An injection pump is arranged between the last conveying agitator 2 and the cooling tower 5. The thermal oil furnace 3 is connected to the second and second conveying agitators respectively. The third and fourth conveying agitators 2, one of the storage tanks 4 and the heat conduction box are connected.

Several storage tanks 4 are respectively equipped with emulsifier A, emulsifier B, emulsifier C, emulsifier D, crystal maleic anhydride and white oil; start the first delivery agitator 2, and pump the corresponding The emulsifier A, emulsifier B, and emulsifier C inside the storage tank 4 are added in proportion to the first conveying agitator 2, and are stirred and reacted while being added and output. After being fully mixed under normal temperature conditions, when entering At hour 0, the time of discharge is hour 2, and the reaction time is 2 hours. Emulsion No. I is obtained. The discharged emulsion I is calculated and designed according to the density and mass of emulsion I and the required mixing ratio for secondary mixing. The diameter and quantity of the feed tube; start the second conveying agitator 2, adjust the temperature of the second conveying agitator 2 through the thermal oil furnace 3 to rise to 135°C, and the No. I emulsion enters the second conveying agitator 2 in proportion , at the same time, add the emulsifier D inside the storage tank 4 into the second conveying mixer 2 in proportion through the injection pump, stir while adding and react while outputting, stir and react for 1.5h, enter at the 0th hour, and discharge The time is 1.5h, the reaction time is 1.5h, and No. II emulsion is obtained; No. II emulsion is introduced into the interior of the thermal insulation feed box 35, and the temperature of the thermal insulation feed box 35 is adjusted to 170°C, time the heat preservation and water removal for 2 hours, the time of entry is the 0th hour, and the time of discharge is the 2h. The emulsion II with water removal is obtained. The liquefaction storage tank 32 is heated by the heat conduction box 32, so that the crystal inside the liquefaction storage tank 32 is evaporated. The acid anhydride melts to obtain liquid maleic anhydride; the third conveying agitator 2 is started, and the temperature of the third conveying agitator 2 is raised to 150°C through the thermal oil furnace 3, and the dewatered No. II emulsion and liquid maleic anhydride are simultaneously Add proportionally to the third conveying mixer 2 through the injection pump, stir while reacting while outputting, the time of entry is the 0th hour, the time of discharge is the 2h, the stirring and heat preservation time is 2h, and the No. II emulsion is obtained. For the discharged No. II emulsion, calculate and design the diameter and quantity of the feed tube according to the density and mass of the No. II emulsion and the required mixing ratio of the four mixings; start the fourth conveying agitator 2, and pass The thermal oil furnace 3 raises the temperature of the fourth conveying agitator 2 to 150°C, and the No. II emulsion is added to the fourth conveying agitator 2 in proportion, and the white oil inside the corresponding storage tank 4 is pumped through the injection pump. Add the fourth conveying mixer 2 in proportion, stir while adding and reacting while outputting. After fully reacting for 1-2 hours, the time of entry is hour 0 and the time of discharge is hour 1-2, and emulsion IV is obtained; the finished product is cooled: The No. IV emulsion is transported to the cooling tower 5. After cooling, the emulsifier for synthetic-based drilling fluid is obtained.

The rack 1 includes a rack main body 7, a plurality of foot cups 6 are fixed at the bottom of the rack main body 7, four mounting plates 8 are fixed on each side of the rack main body 7, two mounting plates 8 are provided on the upper side, and two mounting plates 8 are provided on the lower side. There are two mounting plates 8 on the side, a fixed top plate 9 is fixed on the upper end of the frame body 7, the conveying agitator 2 and the storage tank 4 are respectively fixed on the two mounting plates 8 at the corresponding positions, and the thermal oil furnace 3 is set on the fixed The upper end of the top plate 9, the thermal insulation channel box is fixed on the lower end of the fixed top plate 9, and the cooling tower 5 is fixed inside the main body 7 of the rack. A number of foot cups 6 are used to adjust the level of the main body 7 of the frame, and the mounting plate 8 is used to install and fix the conveying mixer 2 and the storage tank 4. The layout of each component is reasonable to meet the needs of use.

The conveying mixer 2 includes a conveying mixing box 10. The two sides of the conveying mixing box 10 are respectively provided with an oil inlet pipe 11 and an oil outlet pipe 18. The oil inlet pipe 11 and the oil outlet pipe 18 are respectively connected to the oil outlet end and the oil inlet end of the thermal oil furnace 3. A power motor 12 is fixed on the conveying and mixing box 10, and an S-shaped conveying and stirring pipe fitting is fixed inside the conveying and mixing box 10. Both ends of the conveying and mixing pipe fitting respectively extend out of the conveying mixing box 10, and both ends of the conveying and mixing pipe fitting are detachable. A screw joint barrel 16 is provided on the ground, and a sprocket pair 13 is provided between the conveying stirring pipe fittings and the conveying shaft of the power motor 12. The thermal oil furnace 3 sends the hot oil from the oil outlet end into the conveying mixing box 10 through the oil inlet pipe 11, and controls and adjusts the stability inside the conveying mixer 2. The cold oil is discharged from the oil outlet pipe 18 and returns to the interior of the thermal oil furnace 3 through return for recycling. , the conveying shaft of the power motor 12 drives the conveying and stirring pipe fittings to rotate through the sprocket pair 13. Each raw material enters the conveying and mixing pipe fittings from the screw barrel 16 at the feed end in proportion, and is added, stirred, reacted and output, that is, from the screw at the discharge end. The receiver 16 is discharged.

The conveying and mixing pipe fittings include two symmetrical S-shaped conveying and stirring pipes 17. The two symmetrical S-shaped conveying and mixing pipes 17 form a closed whole pipe. The whole pipe is fixed inside the conveying and mixing box 10. The conveying and mixing pipes 17 There are a number of fixed frames 28 fixed inside. The fixed frames 28 of the straight sections of the conveying mixing pipe 17 are provided with long transmission shafts 14. The fixed frames 28 of the curved sections of the conveying mixing pipe 17 are provided with three short transmission shafts 23. Universal joints 22 are connected between the long transmission shaft 14 and the short transmission shaft 23, and between several short transmission shafts 23. The long transmission shaft 14 is provided with several groups of mixing and cutting blades 24, agitating blades 25 and material conveying agitators. Frame 26, stirring blades 25 are fixed on the transmission short shafts 23 on both sides of the curved section of the conveying mixing pipe 17, and stirring blades 24 are fixed on the transmission short shafts 23 in the middle of the curved section of the conveying mixing pipe 17. An external thread 19 is provided on the outside of the end of the stirring tube 17 . Two symmetrical S-shaped conveying and mixing tubes 17 form a closed whole tube, which is easy to install and disassemble. The fixed frame 28, the long transmission shaft 14 and the short transmission shaft 23. The long transmission shaft 14 rotates to drive the mixing and cutting blades at the corresponding positions. 24. The agitating blade 25 and the conveying agitating frame 26 rotate to perform cutting, stirring and conveying. The mixing is sufficient and the material can be transported stably. The long transmission shaft 14 drives the short transmission shaft 23 to rotate through the universal joint 22, and the transmission The short shaft 23 drives the transmission short shaft 23 to rotate through the universal joint 22, thereby driving the stirring blade 25 and the stirring blade 24 at the corresponding position to rotate, to perform stirring, stirring and conveying materials, sufficient mixing and mixing, and at the same time, the materials can be transported stably.

The inside of the threaded barrel 16 is provided with internal threads, and the internal threads match the external threads. A sealed bearing seat is fixed on the threaded barrel 16. The ends of the long transmission shafts 14 on both sides penetrate the sealed bearing seats. The transmission at the feed end There is a sprocket pair 13 between the end of the long shaft 14 and the output shaft of the power motor 12. A number of circumferentially uniform feed tubes 15 are fixed on the threaded barrel 16. The feed tubes 15 are connected to the corresponding injection pump. There are multi-channel solenoid valves between them.

The internal thread and the external thread match and are used to install the threaded barrel 16. The ends of the long transmission shaft 14 on both sides penetrate the sealed bearing seat, which facilitates the rotation of the long transmission shaft 14 and sealing. Several guide materials evenly distributed around the circumference Tube 15, according to the density and quality of each raw material, each emulsion, and the required mixing ratio, calculate and design the diameter and quantity of the feed tube 15, and the multi-channel between the feed tube 15 and the corresponding injection pump The solenoid valve cooperates to inject material, so that the injection of each material guide tube 15 is a unit amount. The output shaft of the power motor 12 drives the end of the long transmission shaft 14 of the feed end to rotate through the sprocket pair 13 for stable rotation. Mixing and conveying.

The fixed frame 28 is arc-shaped. The upper end surface of the fixed frame 28 is lower than the upper end surface of the conveying and stirring tube 17. An engaging groove is formed between the upper end surfaces of the two conveying and stirring tubes 17. The fixed frame 28 includes a fixed frame. Body 29, the fixing frame body 29 is engaged inside the fixing frame 28, symmetrical resisting locking blocks 30 are fixed on both sides of the fixing frame body 29, the resisting locking blocks 30 are engaged inside the engaging grooves at corresponding positions, and the fixed frame body The limited bearing seat 31 is fixed inside 29, and the long transmission shaft 14 and the short transmission shaft 23 are respectively fixed inside the limited bearing seat 31 at corresponding positions.

The upper end surface of the fixing frame 28 is lower than the upper end surface of the conveying and stirring tube 17 , and an engaging groove is formed between the upper end surfaces of the fixing frames 28 of the two conveying and stirring tubes 17 for engaging and resisting the locking block 30 , that is, resisting the locking block 30 Engaged inside the engaging grooves at corresponding positions, the long transmission shaft 14 and the short transmission shaft 23 are respectively fixed inside the limit bearing seats 31 at the corresponding positions, which facilitates the stable rotation of the long transmission shaft 14 and the short transmission shaft 23.

A heat conduction box 33 is fixed inside the liquefaction storage tank 32, and a thermal insulation feed box 35 is fixed inside the thermal conduction box 33. The upper ends of the liquefaction storage tank 32 and the thermal insulation feed box 35 are open, and the upper end of one side of the heat conduction box 33 is provided with The oil inlet joint 34 and the lower end of the other side of the heat transfer box 33 are provided with an oil outlet joint 37. The oil inlet joint 34 and the oil outlet joint 37 are respectively connected to the oil outlet end and the oil inlet end of the heat transfer oil furnace 3. The oil inlet joint 34 and The oil outlet joints 37 respectively penetrate the liquefaction storage tank 32. The lower end of the liquefaction storage tank 32 is provided with a liquefaction discharge pipe 39. The liquefaction discharge pipe 39 is connected to the corresponding injection pump. The lower end of the thermal insulation feed tank 35 is provided with a discharge pipe. 38. The discharge pipe 38 runs through the liquefaction storage tank 32 and the heat conduction box 33. The discharge pipe 38 is connected to the corresponding injection pump. A number of alternately distributed oil guide groove plates 36 are provided inside the thermal insulation feed tank 35.

The crystalline maleic anhydride is installed inside the liquefied storage tank 32. The thermal oil furnace 3 transfers the hot oil from the oil outlet end through the oil inlet joint 34 into the heat transfer tank 33, and controls and adjusts the stability inside the thermal insulation feed tank 35. The cold oil flows from the oil outlet joint 37 is discharged and returned to the inside of the thermal oil furnace 3 for recycling. The excess heat is dissipated to the inside of the liquefaction storage tank 32 to melt the crystal maleic anhydride to obtain liquid maleic anhydride. The liquid maleic anhydride is discharged from the liquefaction discharge pipe 39 , injected into the interior of the corresponding screw barrel 16 through the corresponding injection pump, the mixed emulsion (No. II emulsion) inside the thermal insulation feed box 35 flows along several alternately distributed oil guide groove plates 36, and enters the 0h, the time of discharge is 2h. During this process, the No. I emulsion is kept warm and dewatered for 2 hours to obtain the dewatered No. II emulsion, which is discharged from the discharge pipe 38 and injected into the corresponding screw joint through the corresponding injection pump. inside the barrel 16.

In summary, each component is installed and fixed through the rack 1, with a reasonable layout to meet the use needs; through the cooperation of several conveying mixers 2 and the thermal insulation channel box, an assembly line production is formed, adding, stirring, reacting and outputting, saving conveying time, The material discharging is stable, there is no waiting time for material injection, and the production is efficient; the conveying mixer 2 cooperates with the screw joint barrel 16 through the conveying mixing pipe fittings, and can perform proportioning according to the weight ratio of the materials. The material injection ratio is stable, and the material is pumped and injected smoothly. Intermittent, high efficiency; through the cooperation of the liquefaction storage box 32, the heat conduction box 33 and the insulation feed box 35, the heat conduction box 33 heats the liquefaction storage box 32 and the insulation feed box 35, which can quickly liquefy the crystal maleic anhydride, After obtaining liquid crystal maleic anhydride, the emulsion can also be quickly and stably kept warm and dehydrated; the thermal oil furnace 3 cooperates with several conveying mixers 2 and thermal conduction boxes 33 to achieve stable and adjustable temperature, ensuring a stable mixing temperature. state.

A main emulsifier for synthetic-based drilling fluids, including the main emulsifier for synthetic-based drilling fluids processed by the above production method.

Embodiment 1

Step 1, production preparation: clean the production site, determine the product production method and formula, check whether the machinery and equipment can operate normally, prepare raw materials according to the ratio; the storage tank 3 contains the preparation raw materials: emulsifier A, emulsifier B, emulsifier D , maleic anhydride and white oil;

Step 2, primary mixing: start the first conveying agitator 2, the output shaft of the power motor 12 drives the end of the long transmission shaft 14 at the feed end to rotate through the sprocket pair 13, and the long transmission shaft 14 drives the transmission through the universal joint 22 The short shaft 23 rotates, and the short transmission shaft 23 drives the short shaft 23 to rotate through the universal joint 22, thereby driving the stirring blades 24, the stirring blades 25 and the conveying stirring frame 26 at the corresponding positions to rotate, and driving the stirring blades 25 and 25 at the corresponding positions. The mixing and cutting blades 24 rotate, and the multi-channel solenoid valves between the material guide tube 15 and the corresponding injection pump cooperate to inject material, so that the material injected into each material guide tube 15 is a unit amount, and is passed through several injection pumps respectively. Add the emulsifier A, emulsifier B and emulsifier C in the corresponding storage tank 4 in proportion to the two symmetrical S-shaped conveying agitators of the first conveying agitator 2 through the feed pipe 15 at the feed end. Tube 17 forms a closed whole tube, and is added and stirred while reacting and outputting. After thorough mixing under normal temperature conditions, the time of entry is 0h, the time of discharge is 2h, and the reaction time is 2h, to obtain emulsion No. I, I No. emulsion is discharged through the guide tube 15 at the discharge end;

Step 3, secondary mixing: start the second conveying agitator 2, adjust the temperature of the second conveying agitator 2 through the thermal oil furnace 3 to rise to 135°C, and the No. I emulsion enters the second conveying agitator 2 in proportion. , at the same time, add the emulsifier D inside the storage tank 4 into the second conveying mixer 2 in proportion through the injection pump, stir while adding and react while outputting, the stirring reaction is 1.5h, the entry is the 0th hour, and the discharge It is 1.5h, the reaction time is 1.5h, and emulsion No. II is obtained;

Step 4: Insulate and remove water, and crystallized maleic anhydride melts: crystalline maleic anhydride is installed inside the liquefied storage tank 32, and the thermal oil furnace 3 transfers the hot oil from the oil outlet end into the thermal tank 33 through the oil inlet joint 34, and controls and adjusts the thermal insulation channel. The inside of the material tank 35 is stabilized, and the cold oil is discharged from the oil outlet joint 37 and returns to the inside of the thermal oil furnace 3 for recycling. The excess heat is dissipated to the inside of the liquefaction storage tank 32 to melt the crystalline maleic anhydride to obtain liquid maleic acid. Acid anhydride and liquid maleic anhydride are discharged from the liquefaction discharge pipe 39 and injected into the interior of the corresponding screw barrel 16 through the corresponding injection pump. The No. II emulsion is introduced into the interior of the insulation feed box 35 and along several alternately distributed guides. The oil tank plate 36 flows, entering at the 0th hour and discharging at the 2nd hour. During this process, the No. II emulsion is kept warm and dewatered for 2 hours to obtain the dewatered No. II emulsion, which is discharged from the discharge pipe 38 through the corresponding The injection pump injects the material into the interior of the corresponding screw barrel 16;

Step five, three times of mixing: start the third conveying agitator 2, raise the temperature of the third conveying agitator 2 to 150°C through the thermal oil furnace 3, and inject the dehydrated No. II emulsion and liquid maleic anhydride at the same time. The pump is added to the third delivery mixer 2 in proportion, and it is added and stirred while reacting and outputting. The time of entry is 0h, the time of discharge is 2h, the stirring and heat preservation time is 2h, and emulsion No. II I is obtained. The discharged II For No. I emulsion, calculate and design the diameter and number of feed tubes based on the density and mass of No. II emulsion and the required mixing ratio of four times of mixing;

Step six, four times of mixing: start the fourth conveying agitator 2, raise the temperature of the fourth conveying agitator 2 to 150°C through the thermal oil furnace 3, and add the No. II emulsion to the fourth conveying agitator 2 in proportion. , add the white oil inside the corresponding storage tank 4 to the fourth conveying mixer 2 in proportion through the injection pump, and stir and react while adding and outputting. After fully reacting for 1-2 hours, it is the 0th hour when entering. The discharge time is 1-2h, and emulsion No. IV is obtained;

Step 7: Cooling of the finished product: Transport the No. IV emulsion to the cooling tower 5. After cooling, the main emulsifier for synthetic-based drilling fluid is obtained.

In step two, emulsifier A is an alkyl fatty alcohol amide nonionic surfactant, emulsifier B is a fatty acid ester, emulsifier C is a sulfate, and the weight mixing ratio of emulsifier A to emulsifier B and emulsifier C is It is 1:2:2.

In step three, emulsifier D is 1,5-diaminopentane, and the weight mixing ratio of emulsion No. I to emulsifier D is 12:1.

In step five, the weight mixing ratio of No. II emulsion and liquid maleic anhydride is 20:1.

In step six, the weight mixing ratio of No. II emulsion and white oil is 10:1.

The unit weight of the material discharged by the injection pump is the product of the pumped volume and the density of the pumped material. The total weight of the material discharged by the injection pump is the product of the extruded unit weight and the extrusion time.

A main emulsifier for synthetic-based drilling fluids, including the main emulsifier for synthetic-based drilling fluids processed by the above production method.

Technical requirements table for primary emulsifiers used in synthetic-based drilling fluids (see Table 1, see Figure 13).

1. Test method:

1.1. Appearance: Weigh about 20.0g of the sample and place it in a 100mL stoppered test tube, and visually observe the measurement table under bright natural light (see Table 2, see Figure 14).

As can be seen from Table 2, the appearance requirements are met.

1.2. Determination of emulsification rate:

Add 240 mL of organic polymer LH-STC as the base fluid for synthetic-based drilling fluid and 15.0 g of the sample into the high stirring cup. Stir at high speed for 5 minutes. Add 10.0 g of the main emulsifier for synthetic-based drilling fluid. After stirring at high speed for 5 minutes, add 6.0 g Synthetic-based drilling fluid uses alkalinity regulator calcium substance LH-SCO. After high-speed stirring for 5 minutes, add 60 mL of synthetic-based drilling fluid activity regulator inorganic calcium salt LH-SCL (25%) aqueous solution. Stir at high speed for 10 minutes. Add 12.0 g Synthetic-based drilling fluid uses viscosity-increasing agent polymer LH-SOC, stir at high speed for 10 minutes, finally add 172.5g of barite with a density of 4.2g/ ^cm3 , stir at high speed for 20 minutes, then pour into a 500mL measuring cylinder, let stand for 1 hour, and measure the upper layer The volume of clear oil V (mL).

Calculate the emulsification rate (%) according to formula (1), and take the average value of multiple measurements (see Table 3, see Figure 15).

In the formula: W——emulsification rate, unit is volume percentage (%);

_VTotal - total volume, in milliliters (mL);

V——The volume of clear oil, in milliliters (mL).

As can be seen from Table 3, taking the average of 5 measurements,

(53.1+55.6+54.4+53.4+55.4)/5=54.38, which is greater than 50.0.

Meet the emulsification rate requirements.

1.3. Determination of electrical stability:

Add 240 mL of organic polymer LH-STC as the base fluid for synthetic-based drilling fluid and 15.0 g of the sample into the high stirring cup. Stir at high speed for 5 minutes. Add 10.0 g of the main emulsifier for synthetic-based drilling fluid. After stirring at high speed for 5 minutes, add 6.0 g. Use alkalinity regulator calcium substance LH-SCO for synthetic-based drilling fluid. After stirring at high speed for 10 minutes, add 60 mL of aqueous solution of inorganic calcium salt LH-SCL (25%), an activity regulator for synthetic-based drilling fluid. Stir at high speed for 10 minutes. Add 12.0 g synthetic-based drilling fluid viscosity-increasing agent polymer LH-SOC, stir at high speed for 10 minutes, finally add 172.5g of barite with a density of 4.2g/ ^cm3 , stir at high speed for 20 minutes, and follow GB/T16783.2 at 50℃±2℃ According to the regulations, the electrical stability ES is measured, and the average value of the three measurements is taken (as shown in Table 4, see Figure 16);

It can be seen from Table 4 that the average value of three measurements is (245+235+239)/3=239.67, which is greater than 200.

Meet electrical stability requirements.

2. Inspection rules

2.1. Factory inspection

Each batch of products should be inspected before leaving the factory, and the inspection items are all technical indicators listed in Table 1.

2.2. Sampling method

Samples are taken at a ratio of 5% of the total number of barrels. When sampling, use a sampler to draw samples from the upper, middle and lower parts of the barrel. Shake the product thoroughly after sampling, put equal amounts into 2 clean, dry, stoppered reagent bottles, seal and label, and indicate the name of the manufacturer, product name, batch number, sampling date and sampler. One bottle was sent for inspection and one bottle was reserved for re-inspection.

2.3 Type inspection

Type inspection will be carried out when one of the following situations occurs;

a) When the product is finalized and identified; b) When the product raw materials or processes change, affecting product performance; c) When the product is produced for 30 tons; d) When the quality supervision department proposes inspection requirements; e) When the product needs to be resumed after half a year of suspension.

2.4. Determination rules

The manufacturer should ensure that each batch of products shipped meets the requirements of this standard. Take samples according to the sampling method and conduct inspection according to the test methods stipulated in this standard. When it is found that a certain technical indicator does not meet this standard, double the sampling for re-inspection. If the re-inspection result still does not meet this standard, it is considered a substandard product.

3. Marking, packaging, storage and transportation

3.1. Marking: The product name, trademark, execution standard, and net mass should be marked on the package, and the manufacturer's name, batch number, and production date should be marked on the bottom of the barrel.

3.2. Packaging: This product should be packed in clean, dry, sealed plastic drums or iron drums.

3.3. Storage and transportation: The product should be stored in a ventilated, dry place and protected from long-term sunlight. Protect from rain during transportation to avoid severe collision and damage to the packaging.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or additions to the described specific embodiments or substitute them in similar ways, but this will not deviate from the spirit of the present invention or exceed the definition of the appended claims. range.

Claims (7)

1. The production method of the main emulsifier for the synthetic base drilling fluid is characterized by comprising the following processing steps:

step one, preparation of production: cleaning a production site, determining a production method and a formula of a product, checking whether mechanical equipment can normally operate, and preparing raw materials according to a proportion;

step two, primary mixing: starting a first conveying stirrer, respectively adding the emulsifier A, the emulsifier B and the emulsifier C in the corresponding storage tanks into the first conveying stirrer according to a proportion through a plurality of material injection pumps, stirring while reacting, outputting, fully mixing under normal temperature conditions, obtaining an I emulsion after 0h in the inlet and 2h in the outlet, and calculating and designing the diameter and the number of the material guiding pipes according to the density and the quality of the I emulsion and the mixing proportion required by secondary mixing, wherein the reaction time is 2h in the outlet, and the I emulsion is obtained;

step three, secondary mixing: starting a second conveying stirrer, regulating the temperature of the second conveying stirrer to 135 ℃ through a heat conduction oil furnace, enabling the emulsion I to enter the second conveying stirrer in proportion, simultaneously adding the emulsifier D in the material storage tank into the second conveying stirrer in proportion through a material injection pump, stirring and reacting for 1.5h while outputting, wherein the time of stirring and reacting is 0h when entering, the time of discharging is 1.5h, and the reaction time is 1.5h, so that the emulsion II is obtained;

Fourthly, heat preservation and water removal and crystal maleic anhydride melting: the emulsion II is led into a heat-insulating feeding box, a heat-conducting box is arranged outside the heat-insulating feeding box, a liquefaction storage box is arranged outside the heat-conducting box, the temperature of the heat-insulating feeding box is adjusted to 170 ℃ through the cooperation of a heat-conducting oil furnace and the heat-conducting box, heat preservation and water removal are performed for 2 hours in a timing mode, the emulsion II is obtained after the emulsion II is fed into the heat-insulating feeding box, the emulsion II is discharged for 2 hours, and the liquefaction storage box is heated by the heat-conducting box, so that crystalline maleic anhydride in the liquefaction storage box is melted, and liquid maleic anhydride is obtained;

step five, mixing for three times: starting a third conveying stirrer, heating the temperature of the third conveying stirrer to 150 ℃ through a heat conducting oil furnace, adding the dehydrated emulsion II and liquid maleic anhydride into the third conveying stirrer in proportion through a material injection pump, stirring and outputting while reacting, wherein the time of feeding is 0h, the time of discharging is 2h, the stirring and heat preservation time is 2h, the emulsion III is obtained, the emulsion III is discharged, and the diameter and the number of the material guiding pipes are calculated and designed according to the density and the quality of the emulsion III and the mixing proportion required by four times of mixing;

step six, four times of mixing: starting a fourth conveying stirrer, heating the fourth conveying stirrer to 150 ℃ through a heat conduction oil furnace, adding the emulsion III into the fourth conveying stirrer in proportion, adding white oil in a corresponding storage tank into the fourth conveying stirrer in proportion through a material injection pump, stirring while reacting, outputting, fully reacting for 1-2h, then adding for 0h, and discharging for 1-2h to obtain emulsion IV;

Step seven, cooling the finished product: and conveying the IV emulsion to a cooling tower, and cooling to obtain the main emulsifier for the synthetic base drilling fluid.

2. The method for producing a main emulsifier for a synthetic base drilling fluid according to claim 1, wherein in the second step, the emulsifier A is an alkyl fatty alcohol amide nonionic surfactant, the emulsifier B is a fatty acid ester, the emulsifier C is sulfate, and the weight mixing ratio of the emulsifier A to the emulsifier B to the emulsifier C is 1:2:2.

3. the method for producing a main emulsifier for synthetic base drilling fluids according to claim 1, wherein in the third step, the emulsifier D is 1, 5-diaminopentane, and the weight mixing ratio of the emulsion I and the emulsifier D is 12:1.

4. the method for producing a main emulsifier for synthetic base drilling fluids according to claim 1, wherein in the fifth step, the weight mixing ratio of the emulsion II and the liquid maleic anhydride is 20:1.

5. the method for producing a main emulsifier for synthetic base drilling fluids according to claim 1, wherein in the sixth step, the weight mixing ratio of the emulsion III to the white oil is 10:1.

6. The method of claim 1, wherein the unit weight of the material discharged from the injection pump is the product of the pumped volume and the density of the pumped material, and the total weight of the material discharged from the injection pump is the product of the extruded unit weight and the extrusion time.

7. A main emulsifier for synthetic base drilling fluids, comprising the main emulsifier for synthetic base drilling fluids processed by the production method of any one of claims 1 to 6.