阅读说明：本技术 一种油田稀释剂及其制备工艺 (Oil field diluent and preparation process thereof ) 是由 宋文平 于 2021-08-26 设计创作，主要内容包括：本发明涉及稀释剂制备领域,更具体的说是一种油田稀释剂及其制备工艺。包括以下步骤：(A)按质量份数准备稀释剂的各组分：柴油、酮类、醇类A、醇类B、吡咯、烷基多糖苷、甜菜碱、醚类、渗透剂；各成分的重量比为2-4∶1-2∶7-9∶3-6∶5-8∶6-7∶5-9∶6-9∶3-6；(B)将烷基多糖苷、甜菜碱加入到柴油中,在温度为50-70℃搅拌速度为200-500r/min的条件下搅拌混合得到初级混合物A；(C)将步骤(A)中准备的酮类、醇类A、吡咯、醇类B、醚类、渗透剂搅拌混合得到初级混合物B；(D)将初级混合物A和初级混合物B倒入反应器中,向反应器内注入氦气1-3h,注入氦气结束后,在温度为30-40℃搅拌速度为200-500r/min的条件下开始搅拌,搅拌时间为1-2h。(The invention relates to the field of diluent preparation, in particular to an oil field diluent and a preparation process thereof. The method comprises the following steps: (A) preparing the components of the diluent according to the mass parts: diesel oil, ketones, alcohols A, alcohols B, pyrrole, alkyl polyglycoside, betaine, ethers, penetrant; the weight ratio of each component is 2-4: 1-2: 7-9: 3-6: 5-8: 6-7: 5-9: 6-9: 3-6; (B) adding alkyl polyglycoside and betaine into diesel oil, and stirring and mixing at 50-70 ℃ and a stirring speed of 200-500r/min to obtain a primary mixture A; (C) stirring and mixing the ketones, the alcohols A, the pyrrole, the alcohols B, the ethers and the penetrating agent prepared in the step (A) to obtain a primary mixture B; (D) pouring the primary mixture A and the primary mixture B into a reactor, injecting helium into the reactor for 1-3h, and after the injection of the helium is finished, starting stirring at the temperature of 30-40 ℃ and the stirring speed of 200-500r/min for 1-2 h.)

1. The preparation process of the oil field diluent is characterized by comprising the following steps of:

(A) preparing the components of the diluent according to the mass parts: diesel oil, ketones, alcohols A, alcohols B, pyrrole, alkyl polyglycoside, betaine, ethers, penetrant; the weight ratio of each component is 2-4: 1-2: 7-9: 3-6: 5-8: 6-7: 5-9: 6-9: 3-6;

(B) adding alkyl polyglycoside and betaine into diesel oil, and stirring and mixing at 50-70 ℃ and a stirring speed of 200-500r/min to obtain a primary mixture A;

(C) stirring and mixing the ketones, the alcohols A, the pyrrole, the alcohols B, the ethers and the penetrating agent prepared in the step (A) to obtain a primary mixture B;

(D) pouring the primary mixture A and the primary mixture B into a reactor, injecting helium into the reactor for 1-3h, and starting stirring at the temperature of 30-40 ℃ and the stirring speed of 200-500r/min for 1-2h after the injection of the helium is finished;

(E) after stirring in the step (D), heating to 50-60 ℃, reacting for 1-2h, then continuously heating to 75-80 ℃, reacting for 2-3h, then continuously heating to 85-90 ℃, reacting for 3-4h, and cooling to obtain the oil field diluent;

(F) and testing the viscosity reduction performance of the obtained oil field diluent.

2. The process according to claim 1, characterized in that: after the primary mixture A is obtained in the step (B), the primary mixture A is required to be kept standing for 3 hours in an environment of 25 ℃.

3. The process according to claim 1, characterized in that: after the primary mixture B is obtained in the step (C), the primary mixture B is required to be kept standing for 3 hours in an environment of 25 ℃.

4. The process according to claim 1, characterized in that: the penetrant is one or more of sulfated castor oil, sodium alkyl sulfonate and sodium alkyl benzene sulfonate.

5. The process according to claim 1, characterized in that: the ketone is methyl isobutyl ketone.

6. The process according to claim 1, characterized in that: the alcohol A is one or more of isopropanol and propanol.

7. The process according to claim 1, characterized in that: the alcohol B is polyvinyl alcohol.

8. The process according to claim 1, characterized in that: the ether is diethylene glycol dimethyl ether.

9. The process according to claim 1, characterized in that: and (E) testing the viscosity reduction performance of the oilfield diluent in the step (E) by using a viscosity reduction performance testing device.

10. An oil field diluent, which is characterized in that: the oilfield diluent is prepared according to the preparation process of any one of claims 1-9.

Technical Field

The invention relates to the field of diluent preparation, in particular to an oil field diluent and a preparation process thereof.

Background

When oil is exploited in an oil field, the oil is conveniently exploited after viscosity reduction and dilution, and the conditions of energy conservation, cost reduction and environmental protection need to be met during oil exploitation.

The heavy oil has low light component content, high asphaltene and colloid content and low straight-chain hydrocarbon content, so that most of the heavy oil has the characteristics of high viscosity and high density, and the heavy oil is difficult to recover and transport. The common viscosity-reducing methods used inside and outside China during the process of thick oil recovery include a heating method, a thin oil mixing method, thick oil modification viscosity reduction and a chemical agent viscosity reduction method. It is needed to prepare an oil field diluent with better viscosity reduction effect.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the oilfield diluent and the preparation process thereof, and the oilfield diluent has the beneficial effect that the viscosity reduction effect of the oilfield diluent prepared by the invention is better.

The preparation process of the oil field diluent comprises the following steps:

(A) preparing the components of the diluent according to the mass parts: diesel oil, ketones, alcohols A, alcohols B, pyrrole, alkyl polyglycoside, betaine, ethers, penetrant; the weight ratio of each component is 2-4: 1-2: 7-9: 3-6: 5-8: 6-7: 5-9: 6-9: 3-6;

(B) adding alkyl polyglycoside and betaine into diesel oil, and stirring and mixing at 50-70 ℃ and a stirring speed of 200-500r/min to obtain a primary mixture A;

(C) stirring and mixing the ketones, the alcohols A, the pyrrole, the alcohols B, the ethers and the penetrating agent prepared in the step (A) to obtain a primary mixture B;

(D) pouring the primary mixture A and the primary mixture B into a reactor, injecting helium into the reactor for 1-3h, and starting stirring at the temperature of 30-40 ℃ and the stirring speed of 200-500r/min for 1-2h after the injection of the helium is finished;

(E) after stirring in the step (D), heating to 50-60 ℃, reacting for 1-2h, then continuously heating to 75-80 ℃, reacting for 2-3h, then continuously heating to 85-90 ℃, reacting for 3-4h, and cooling to obtain the oil field diluent;

(F) and testing the viscosity reduction performance of the obtained oil field diluent.

Preferably, after the primary mixture a is obtained in the step (B), the primary mixture a needs to be left standing for 3 hours in an environment of 25 ℃.

Preferably, after the primary mixture B is obtained in the step (C), the primary mixture B is required to be kept standing for 3 hours in an environment of 25 ℃.

Preferably, the penetrant is one or more of sulfated castor oil, sodium alkyl sulfonate, and sodium alkyl benzene sulfonate.

Preferably, the ketone is methyl isobutyl ketone.

Preferably, the alcohol A is one or more of isopropanol and propanol.

Preferably, the alcohol B is polyvinyl alcohol.

Preferably, the ether is diethylene glycol dimethyl ether.

Preferably, the viscosity reduction performance of the oilfield diluent in the step (E) is tested by a viscosity reduction performance testing device.

An oil field diluent is prepared according to the preparation process of the oil field diluent.

Drawings

The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a process flow diagram of example 1;

FIG. 2 is a process flow diagram of example 2;

FIG. 3 is a process flow diagram of example 3;

FIG. 4 is a process flow diagram of example 4;

FIG. 5 is a process flow diagram of comparative example 1;

FIG. 6 is a process flow diagram of comparative example 2;

FIG. 7 is a process flow diagram of comparative example 3;

FIG. 8 is a data plot of a comparative test;

FIG. 9 is a schematic structural diagram I of the viscosity reduction performance testing apparatus;

FIG. 10 is a schematic structural diagram II of the viscosity reduction performance testing apparatus;

FIG. 11 is a first schematic view of the structure of the test board and L-shaped bars;

FIG. 12 is a second schematic view of the test plate and L-shaped bar;

FIG. 13 is a first schematic structural view of a base;

fig. 14 is a second schematic structural view of the base.

In the figure:

a test board 101; a push plate 102; a baffle plate 103; a spool 104; a screw 105; a screw 106; an internally threaded barrel 107; a threaded post 108; a rough plate 109;

an L-shaped rod 201; a bolt 202; a protruding shaft 203; a plug screw 204; a rotating strip 205; a straight rod 206;

a base 301; a slide case 302; a vertical hole rod 303; a vertical hole 304; a mixing drum 305; a column 306; exiting the tube 307.

Detailed Description

The preparation process of the oil field diluent comprises the following steps:

(A) preparing the components of the diluent according to the mass parts: diesel oil, ketones, alcohols A, alcohols B, pyrrole, alkyl polyglycoside, betaine, ethers, penetrant; the weight ratio of each component is 2-4: 1-2: 7-9: 3-6: 5-8: 6-7: 5-9: 6-9: 3-6;

taking out each raw material for preparing the oil field diluent, and facilitating the next step of preparing crude oil;

(B) adding alkyl polyglycoside and betaine into diesel oil, and stirring and mixing at 50-70 ℃ and a stirring speed of 200-500r/min to obtain a primary mixture A;

the alkyl polyglycoside and the betaine are added into the diesel oil firstly, the alkyl polyglycoside, the betaine and the diesel oil can be mixed in advance, the problem that the mixed alkyl polyglycoside, the betaine and the diesel oil are not mixed smoothly is solved, and the mixed alkyl polyglycoside, the betaine and the diesel oil need to be stirred at the temperature of 50-70 ℃ and the stirring speed of 200-500r/min, so that the stirring effect is better.

(C) Stirring and mixing the ketones, the alcohols A, the pyrrole, the alcohols B, the ethers and the penetrating agent prepared in the step (A) to obtain a primary mixture B;

the raw materials which are left to be easily mixed are generally mixed;

(D) pouring the primary mixture A and the primary mixture B into a reactor, injecting helium into the reactor for 1-3h, and starting stirring at the temperature of 30-40 ℃ and the stirring speed of 200-500r/min for 1-2h after the injection of the helium is finished;

helium belongs to inert gas, and the helium is used for preventing excessive reaction of the primary mixture A and the primary mixture B, and after the primary mixture A and the primary mixture B are fully mixed, the primary mixture A and the primary mixture B are reacted, so that the effect is optimal;

(E) after stirring in the step (D), heating to 50-60 ℃, reacting for 1-2h, then continuously heating to 75-80 ℃, reacting for 2-3h, then continuously heating to 85-90 ℃, reacting for 3-4h, and cooling to obtain the oil field diluent;

reacting the primary mixture A and the primary mixture B after the mixture is fully mixed, wherein the reaction is divided into three times of temperature rise, and the primary mixture A and the primary mixture B have better reaction effect in a gradual temperature rise mode;

(F) and testing the viscosity reduction performance of the obtained oil field diluent.

And during testing, a viscosity reduction performance testing device is required to be used for testing.

Example 1:

(A) preparing the components of the diluent according to the mass parts: diesel oil, methyl isobutyl ketone, isopropanol, polyvinyl alcohol, pyrrole, alkyl polyglycoside, betaine, diethylene glycol dimethyl ether and sulfated castor oil; the weight ratio of the components is 2: 8: 4: 6: 5: 7: 5;

(B) adding alkyl polyglycoside and betaine into diesel oil, and stirring and mixing at 50 ℃ and 300r/min to obtain a primary mixture A;

(C) stirring and mixing methyl isobutyl ketone, isopropanol, pyrrole, polyvinyl alcohol, diethylene glycol dimethyl ether and sulfated castor oil prepared in the step (A) to obtain a primary mixture B;

(D) pouring the primary mixture A and the primary mixture B into a reactor, injecting helium 2 into the reactor, and starting stirring at the temperature of 35 ℃ and the stirring speed of 320r/min for 1.5h after the injection of the helium is finished;

(E) after stirring in the step (D), heating to 52 ℃, reacting for 1 hour, then continuously heating to 80 ℃, reacting for 2 hours, then continuously heating to 88 ℃, reacting for 3 hours, and cooling to obtain the oil field diluent;

(F) and testing the viscosity reduction performance of the obtained oil field diluent.

Example 2:

(A) preparing the components of the diluent according to the mass parts: diesel oil, methyl isobutyl ketone, propanol, polyvinyl alcohol, pyrrole, alkyl polyglycoside, betaine, diethylene glycol dimethyl ether and alkyl sodium sulfonate; the weight ratio of the components is 3: 1: 7: 3: 5: 7: 9: 6;

(B) adding alkyl polyglycoside and betaine into diesel oil, and stirring and mixing at 63 ℃ and at a stirring speed of 410r/min to obtain a primary mixture A;

(C) stirring and mixing methyl isobutyl ketone, propanol, pyrrole, polyvinyl alcohol, diethylene glycol dimethyl ether and sodium alkyl sulfonate prepared in the step (A) to obtain a primary mixture B;

(D) pouring the primary mixture A and the primary mixture B into a reactor, injecting helium into the reactor for 1-3h, and starting stirring at the temperature of 40 ℃ and the stirring speed of 260r/min for 2h after the injection of the helium is finished;

(E) after stirring in the step (D), heating to 50 ℃, reacting for 1 hour, then continuously heating to 77 ℃, reacting for 3 hours, then continuously heating to 88 ℃, reacting for 3 hours, and cooling to obtain the oil field diluent;

(F) and testing the viscosity reduction performance of the obtained oil field diluent.

Example 3:

(A) preparing the components of the diluent according to the mass parts: diesel oil, methyl isobutyl ketone, isopropanol, polyvinyl alcohol, pyrrole, alkyl polyglycoside, betaine, diethylene glycol dimethyl ether and sodium alkyl benzene sulfonate; the weight ratio of the components is 2: 7: 4: 7: 6: 7: 5;

(B) adding alkyl polyglycoside and betaine into diesel oil, and stirring and mixing at 70 ℃ and a stirring speed of 500r/min to obtain a primary mixture A;

(C) stirring and mixing methyl isobutyl ketone, isopropanol, pyrrole, polyvinyl alcohol, diethylene glycol dimethyl ether and sodium alkyl benzene sulfonate prepared in the step (A) to obtain a primary mixture B;

(D) pouring the primary mixture A and the primary mixture B into a reactor, injecting helium into the reactor for 1-3h, and starting stirring at 40 ℃ and at a stirring speed of 500r/min for 2h after the injection of the helium is finished;

(E) after stirring in the step (D), heating to 60 ℃, reacting for 2 hours, then continuously heating to 80 ℃, reacting for 3 hours, then continuously heating to 90 ℃, reacting for 4 hours, and cooling to obtain the oil field diluent;

(F) and testing the viscosity reduction performance of the obtained oil field diluent.

Example 4:

(A) preparing the components of the diluent according to the mass parts: diesel oil, methyl isobutyl ketone, propanol, polyvinyl alcohol, pyrrole, alkyl polyglycoside, betaine, diethylene glycol dimethyl ether and sodium alkyl benzene sulfonate; the weight ratio of the components is 3: 1: 7: 3: 5: 6: 7: 5;

(B) adding alkyl polyglycoside and betaine into diesel oil, and stirring and mixing at 50-70 ℃ and at a stirring speed of 265r/min to obtain a primary mixture A;

(C) stirring and mixing methyl isobutyl ketone, propanol, pyrrole, polyvinyl alcohol, diethylene glycol dimethyl ether and sodium alkyl benzene sulfonate prepared in the step (A) to obtain a primary mixture B;

(D) pouring the primary mixture A and the primary mixture B into a reactor, injecting helium into the reactor for 3 hours, and starting stirring at the temperature of 33 ℃ and the stirring speed of 320r/min for 1-2 hours after the injection of the helium is finished;

(E) after stirring in the step (D), heating to 55 ℃, reacting for 1-2h, then continuously heating to 84 ℃, reacting for 3h, then continuously heating to 87 ℃, reacting for 3h, and cooling to obtain the oil field diluent;

(F) and testing the viscosity reduction performance of the obtained oil field diluent.

Comparative example 1:

(A) preparing the components of the diluent according to the mass parts: diesel oil, methyl isobutyl ketone, isopropanol, polyvinyl alcohol, pyrrole, alkyl polyglycoside, betaine, diethylene glycol dimethyl ether and sodium alkyl benzene sulfonate; the weight ratio of the components is 2: 7: 4: 7: 6: 7: 5;

(B) adding alkyl polyglycoside and betaine into diesel oil, and stirring and mixing at 70 ℃ and a stirring speed of 500r/min to obtain a primary mixture A;

(C) stirring and mixing methyl isobutyl ketone, isopropanol, pyrrole, polyvinyl alcohol, diethylene glycol dimethyl ether and sodium alkyl benzene sulfonate prepared in the step (A) to obtain a primary mixture B;

(D) pouring the primary mixture A and the primary mixture B into a reactor, and starting stirring at the temperature of 40 ℃ and the stirring speed of 500r/min for 2 h;

(E) after stirring in the step (D), heating to 60 ℃, reacting for 2 hours, then continuously heating to 80 ℃, reacting for 3 hours, then continuously heating to 90 ℃, reacting for 4 hours, and cooling to obtain the oil field diluent;

(F) and testing the viscosity reduction performance of the obtained oil field diluent.

Comparative example 2:

(A) preparing the components of the diluent according to the mass parts: diesel oil, methyl isobutyl ketone, isopropanol, polyvinyl alcohol, pyrrole, alkyl polyglycoside, betaine, diethylene glycol dimethyl ether and sodium alkyl benzene sulfonate; the weight ratio of the components is 2: 7: 4: 7: 6: 7: 5;

(B) adding alkyl polyglycoside and betaine into diesel oil, and stirring and mixing at 70 ℃ and a stirring speed of 500r/min to obtain a primary mixture A;

(C) stirring and mixing methyl isobutyl ketone, isopropanol, pyrrole, polyvinyl alcohol, diethylene glycol dimethyl ether and sodium alkyl benzene sulfonate prepared in the step (A) to obtain a primary mixture B;

(D) pouring the primary mixture A and the primary mixture B into a reactor, injecting helium into the reactor for 1-3h, and after the injection of the helium is finished, starting stirring at 40 ℃ and at a stirring speed of 500r/min for 2h to obtain an oil field diluent;

(E) and testing the viscosity reduction performance of the obtained oil field diluent.

Comparative example 3:

(A) and directly testing the crude oil on a viscosity reduction performance testing device.

Comparative test

The oil field diluents prepared in examples 1 to 4 and comparative examples 1 to 2 were tested using a viscosity reduction performance testing apparatus, respectively, and 6 parts of oil field diluents were taken out in total in examples 1 to 4 and comparative examples 1 to 2, each 100g of oil field diluents was stirred and mixed with 1000g of crude oil, respectively, and the time for the crude oil mixed with the oil field diluents to flow between two optical sensors on a test board 101 was tested, and the shorter the flow time, the better the effect of the oil field diluents. As shown in fig. 8, the time of crude oil flowing between the two optical sensors in examples 1-4 is significantly shortened, the helium gas is not injected into the reactor in comparative example 1, which results in slightly poor effect of the diluent in the oil field, the temperature of the raw material after stirring is raised three times and the diluent in the oil field is slightly poor in comparative example 2, the crude oil is directly tested on the viscosity reduction performance testing device in comparative example 3, and the time of crude oil flowing between the two optical sensors on the testing board 101 is significantly increased, so that the viscosity of the crude oil can be greatly reduced by the diluent in the oil field prepared by the methods in examples 1-4, and the viscosity of the crude oil can be significantly reduced by the diluent in the oil field prepared by the methods in comparative examples 1-2.

Viscosity reduction capability test device includes survey test panel 101, push jack 102, baffle 103, traveller 104 and screw 105, survey test panel 101 front and back both sides and all be provided with baffle 103, be located the baffle 103 of rear side on sliding connection have traveller 104 in the front and back direction, the anterior fixedly connected with push jack 102 of traveller 104, the downside of push jack 102 and the upside laminating of surveying test panel 101, threaded connection has screw 105 on the baffle 103 that is located the rear side, screw 105 presses on traveller 104, survey test panel 101 eminence and low department and all be provided with optical sensor.

The test board 101 is obliquely arranged, crude oil mixed with oilfield diluent is dripped on the upper part of the test board 101, so that the crude oil flows from the upper part of the test board 101 to the lower part of the test board 101, the time for the crude oil to flow from the upper part of the test board 101 to the lower part of the test board 101 is tested through two optical sensors, and the shorter the flowing time is, the better the effect of the oilfield diluent is; the sliding column 104 can slide back and forth to drive the pushing piece 102 to move back and forth on the upper side of the test board 101, so as to adjust the area between the pushing piece 102 and the baffle 103 positioned on the front side, further adjust the flowing width of the crude oil on the upper side of the test board 101, and adjust the flowing width of the crude oil according to the amount of the crude oil to be tested. The positions of the push plate 102 and the slide column 104 can be fixed by screws 105.

Viscosity reduction capability test device still includes screw thread post 108 and coarse board 109, and the downside tip of surveying test board 101 is provided with screw thread post 108, and coarse board 109 laminates mutually with the downside of surveying test board 101, and coarse board 109 is inserted on screw thread post 108, and threaded connection has the nut on screw thread post 108, and the nut is pressed on coarse board 109, and coarse board 109 can be changed into different roughness's panel.

The underside of the test plate 101 may be mounted with a rough plate 109 of different surface roughness so that the underside of the test plate 101 may be used to test the viscosity of the crude oil after the test plate 101 is inverted.

The viscosity reduction performance testing device further comprises an L-shaped rod 201, a bolt 202, a convex shaft 203, an inserting screw 204, a rotating strip 205, a straight rod 206, a base 301, a mixing cylinder 305, a vertical column 306 and an outlet pipe 307, the right end of the base 301 is fixedly connected with the vertical column 306, the upper portion of the vertical column 306 is provided with the mixing cylinder 305, the lower side of the mixing cylinder 305 is provided with the outlet pipe 307, the outlet pipe 307 is provided with an electromagnetic valve, the upper portion of a testing plate 101 is hinged between the L-shaped rod 201 and the straight rod 206, the bolt 202 penetrates through the L-shaped rod 201 and the straight rod 206, two ends of the bolt 202 are in threaded connection with nuts, and the two nuts are respectively pressed on the outer sides of the L-shaped rod 201 and the straight rod 206. The right end fixedly connected with protruding axle 203 of L shape pole 201, protruding axle 203 rotates and connects on stand 306, and the right end fixedly connected with of protruding axle 203 changes strip 205, and threaded connection has inserting screw 204 on changeing strip 205, and inserting screw 204 can press on the right side of stand 306 and then fix protruding axle 203 on stand 306, and exit tube 307 is located the top of surveying test panel 101 upper portion.

The test board 101 can rotate between the L-shaped rod 201 and the straight rod 206, and then the angle of the test board 101 is adjusted, and then the test board 101 can be adjusted to different angles to test the viscosity of crude oil, by screwing nuts at the front end and the rear end of the bolt 202, the straight rod 206 and the L-shaped rod 201 can be respectively pressed on the front side and the rear side of the test board 101, and then the angle of the test board 101 is fixed, the convex shaft 203 can rotate on the upright 306 by taking the axis of the convex shaft 203 as the axis, and then the convex shaft 203 can rotate 180 degrees, and then the test board 101 is turned over, so that the surface of the rough board 109 faces upwards, the surface of the rough board 109 is used for testing the viscosity of the crude oil, and the convex shaft 203 is pressed on the right side of the upright 306 by inserting the screw 204 to fix the convex shaft 203 on the upright 306. Mixing drum 305 is used to add crude oil and field diluent to facilitate mixing of the crude oil and field diluent, and the mixed crude oil and field diluent fall from outlet pipe 307 to the upper portion of test board 101, so that the crude oil and field diluent flow down from test board 101.

Viscosity reduction capability test device still includes screw rod 106, an internal thread section of thick bamboo 107, sliding box 302, perpendicular hole pole 303 and perpendicular hole 304, sliding box 302 is sliding connection in the upside of base 301 about, the equal fixedly connected with perpendicular hole pole 303 in both ends around sliding box 302, all be provided with perpendicular hole 304 on two perpendicular hole poles 303, both sides all are provided with an internal thread section of thick bamboo 107 around testing board 101 lower part, threaded connection has screw rod 106 on one of them internal thread section of thick bamboo 107, screw rod 106 passes one of them perpendicular hole 304.

When the test board 101 rotates between the L-shaped rod 201 and the straight rod 206, the screw 106 can drive one of the vertical hole rods 303 and the sliding box 302 to move, and further the sliding box 302 is driven to slide left and right on the base 301, so that the sliding box 302 is always located at the lower side of the test board 101 to carry down crude oil, when the test board 101 needs to be turned over, the screw 106 can be detached, and then the screw 106 penetrates one of the vertical holes 304 again after the test board 101 is turned over and is connected to one of the internal threaded cylinders 107, thereby completing the connection between the screw 106 and the test board 101, and enabling the turned test board 101 to still drive the sliding box 302 to slide left and right.