Cement slurry density regulating device

Abstract

The utility model relates to the field of petroleum drilling technology especially, it relates to cementing cement slurry density adjusting device, including upper mixing tank, the bottom of upper mixing tank is provided with lower mixing hopper, the top of upper mixing tank is provided with storage tank, the inside of top of upper mixing tank is equipped with first annular cavity, the bottom of first annular cavity is provided with carousel, the one side of carousel is equipped with injection hole, the inside of upper mixing tank is provided with annular sealing plate, and the second annular cavity is formed by annular sealing plate closure lower mixing hopper, the utility model discloses through the layered dynamic adding mode, utilizes the storage tank storage quantitative density adjusting agent, respectively with the density adjusting agent in storage tank injection into first annular cavity and second annular cavity, rotates carousel to make the adjusting agent in first annular cavity spin out through injection hole, adjusts annular sealing plate and places height, the adjusting agent release in second annular cavity at this moment, thereby makes the density adjusting agent from each position add to the device, and accelerates the mixing penetration time of adjusting agent.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling technology, and in particular to a cement slurry density adjustment device. Background Technology

[0002] In oil drilling cementing operations, cement slurry is a key material in oil and gas drilling engineering. It is mainly used for annular sealing and formation isolation between the casing and the wellbore. Its performance directly affects the integrity of the wellbore and the life of the oil and gas well.

[0003] In the current cement slurry preparation process, the density adjustment structure is mostly set up in a relatively simple way. The density regulator is often added directly above the inlet. The addition position of the regulator is fixed and single. Since the cement slurry has a certain viscosity, it takes a lot of time for the density regulator to seep into the cement slurry from top to bottom, which is inconvenient when adjusting the density.

[0004] Therefore, given that existing cement slurry density adjustment devices have fixed and singular density adjustment agent addition locations, requiring a significant amount of adjustment time, a cement slurry density adjustment device can be designed. This device can add the density adjustment agent from various locations through a layered dynamic addition method, ensuring thorough mixing of the additive with the cement slurry and accelerating the mixing and penetration time of the adjustment agent, thereby effectively enhancing the practical value of the device. Utility Model Content

[0005] To overcome the problem that most cement slurry density adjustment devices have a fixed and single additive location, and that it takes a long time for the density adjuster to penetrate into the cement slurry from top to bottom due to the certain viscosity of the cement slurry, this utility model is proposed.

[0006] The technical solution of this utility model is as follows: a cement slurry density adjustment device, comprising an upper mixing tank, a control panel, a stirring assembly, a lower mixing hopper, a storage tank, an injection assembly, a first annular cavity, a turntable, injection holes, an annular receiving cavity, a lifting mechanism, an annular sealing plate, and a second annular cavity. The lower mixing hopper is provided at the bottom of the upper mixing tank, the control panel is provided on the outside of the upper mixing tank, the stirring assembly is provided on the inside of the upper mixing tank, the storage tank is provided above the upper mixing tank, the injection assembly is provided on the outside of the storage tank, the first annular cavity is provided on the inner side of the top of the upper mixing tank, the turntable is provided at the bottom of the first annular cavity, and multiple sets of injection holes are provided at equal intervals in an annular pattern on one side of the turntable. An annular receiving cavity is provided on the inner wall of the upper mixing tank, and multiple sets of lifting mechanisms are distributed at equal intervals in an annular pattern on the inner side of the annular receiving cavity. An annular sealing plate is provided on the inner side of the annular receiving cavity, and the lower mixing hopper is closed by the annular sealing plate to form the second annular cavity.

[0007] Preferably, cement slurry raw materials are injected into the lower mixing hopper via an upper mixing tank. A fixed amount of density regulator is stored in a storage tank. The density regulator in the storage tank is injected into the first annular cavity and the second annular cavity via an injection assembly. When the mixing assembly rotates, it drives the turntable to rotate synchronously. The rotation of the turntable causes the regulator in the first annular cavity to be discharged through the injection hole and injected into the cement slurry in the lower mixing hopper. The height of the annular sealing plate is adjusted by a lifting mechanism, and the annular sealing plate is moved upward to be stored in the annular receiving cavity. At this time, the regulator in the second annular cavity is released into the lower mixing hopper. The mixing assembly is driven by the control panel to operate. The mixing assembly mixes the cement slurry in the lower mixing hopper, thereby enabling the density regulator to be added into the device from various positions. This ensures that the additive and cement slurry are fully mixed, accelerates the mixing and penetration time of the regulator, and enhances the practical value of the device.

[0008] Preferably, the outer diameter of the top of the lower mixing hopper is larger than that of the bottom of the upper mixing tank. The turntable is rotatably connected to the upper mixing tank. The control panel is electrically connected to the drive mechanism of the lifting mechanism. The annular sealing plate is raised and lowered by the lifting mechanism. The lifting mechanism adopts any one of the following: ball screw, electric push rod, electric cylinder, linear motor, pneumatic cylinder mechanism or hydraulic cylinder.

[0009] Preferably, the injection assembly includes a dosing pipe, a first flow metering valve, and an injection pipe. The dosing pipe is located at the top of the storage tank, and the first flow metering valve is located on the outside of the dosing pipe. The first flow metering valve is electrically connected to the control panel, and the injection pipe is located at the bottom of the storage tank.

[0010] Preferably, the injection assembly also includes a lower branch pipe and a second flow metering valve. The lower branch pipe is provided at the bottom end of the injection pipe and is located at the top of the lower mixing hopper. The lower branch pipe is connected in a continuous manner to the second annular cavity. The second flow metering valve is provided on the outside of the lower branch pipe and is electrically connected to the control panel.

[0011] Preferably, the injection assembly also includes an upper branch pipe and a third flow metering valve. The lower end of the injection pipe is provided with an upper branch pipe, the lower end of which is connected to the first annular cavity. The outer side of the upper branch pipe is provided with a third flow metering valve, which is electrically connected to the control panel.

[0012] Preferably, the mixing assembly includes a rotary motor, a mixing shaft, and mixing paddles. The rotary motor is located at the top outer side of the upper mixing tank and is electrically connected to the control panel. The mixing shaft is rotatably connected to the top inner side of the upper mixing tank. The output end of the rotary motor is connected to the mixing shaft. A turntable is located on the outer side of the top of the mixing shaft. Multiple sets of mixing paddles are distributed in a ring at equal intervals on the outer side of the mixing shaft.

[0013] Preferably, the top of the upper mixing tank is connected to a feed hopper, the bottom of the lower mixing hopper is provided with a discharge pipe, the rear end of the discharge pipe is inclined downward, the front end of the outer side of the discharge pipe is provided with a drive motor, the drive motor is electrically connected to the control panel, the inner side of the discharge pipe is provided with a discharge auger, and the output end of the drive motor is electrically connected to the drive mechanism of the discharge auger.

[0014] The beneficial effects of this utility model are:

[0015] When adjusting the density, the cement slurry raw material is injected into the lower mixing hopper through the upper mixing tank. A certain amount of density regulator is stored in the storage tank. The density regulator in the storage tank is added to the first annular cavity and the second annular cavity respectively through the control panel. The turntable is rotated so that the regulator in the first annular cavity is discharged through the injection hole and added to the cement slurry in the lower mixing hopper. The height of the annular sealing plate is adjusted by the lifting mechanism, and the annular sealing plate is moved up so that it is put into the annular receiving cavity. At this time, the regulator in the second annular cavity is released into the lower mixing hopper for mixing. This solves the problem that most cement slurry density adjustment devices have a fixed and single regulator addition position. Since the cement slurry has a certain viscosity, it takes a long time for the density regulator to seep into the cement slurry from top to bottom. This enhances the practical value of the device. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the cement slurry density adjustment device of this utility model.

[0017] Figure 2 The diagram shown is a cross-sectional plan view of the upper mixing tank and lower mixing hopper of the cementing slurry density adjustment device of this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional cross-sectional view of the upper mixing tank and lower mixing hopper of the cementing slurry density adjustment device of this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of the mixing component of the cement slurry density adjustment device of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Upper mixing tank; 101. Feed hopper; 2. Lower mixing hopper; 201. Discharge pipe; 202. Drive motor; 203. Discharge auger; 3. Control panel; 301. Rotary motor; 302. Stirring shaft; 303. Stirring paddle; 4. Storage tank; 401. Additive pipe; 402. First flow metering valve; 403. Injection pipe; 404. Lower branch pipe; 405. Second flow metering valve; 406. Upper branch pipe; 407. Third flow metering valve; 5. First annular cavity; 6. Turntable; 7. Injection hole; 8. Annular receiving cavity; 9. Lifting mechanism; 10. Annular sealing plate; 11. Second annular cavity. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figures 1-4 This utility model provides an embodiment of a cement slurry density adjustment device, comprising an upper mixing tank 1, a control panel 3, a stirring assembly, a lower mixing hopper 2, a storage tank 4, an injection assembly, a first annular cavity 5, a turntable 6, an injection hole 7, an annular receiving cavity 8, a lifting mechanism 9, an annular sealing plate 10, and a second annular cavity 11. The lower mixing hopper 2 is located at the bottom of the upper mixing tank 1, and the outer diameter of the top of the lower mixing hopper 2 is larger than that at the bottom of the upper mixing tank 1. The control panel 3 is located on the outside of the upper mixing tank 1, and the stirring assembly is located on the inside of the upper mixing tank 1. The storage tank 4 is located above the upper mixing tank 1 and stores a fixed amount of density adjuster. The injection assembly is located on the outside of the storage tank 4. A first annular cavity 5 is provided on the inner side of the top. A turntable 6 is provided at the bottom of the first annular cavity 5. The turntable 6 is rotatably connected to the upper mixing tank 1. Multiple sets of injection holes 7 are provided in an annular shape and equidistantly on one side of the turntable 6. An annular receiving cavity 8 is provided on the inner wall of the upper mixing tank 1. Multiple sets of lifting mechanisms 9 are distributed in an annular shape and equidistantly on the inner side of the annular receiving cavity 8. The control panel 3 is electrically connected to the drive mechanism of the lifting mechanism 9. An annular sealing plate 10 is provided on the inner side of the annular receiving cavity 8. The annular sealing plate 10 is raised and lowered by the lifting mechanism 9. The lifting mechanism 9 adopts any one of ball screw, electric push rod, electric cylinder, linear motor, cylinder mechanism or hydraulic cylinder. The lower mixing hopper 2 is closed by the annular sealing plate 10 to form a second annular cavity 11.

[0023] Please see Figure 3In this embodiment, the injection assembly includes a dosing pipe 401, a first flow metering valve 402, an injection pipe 403, a lower branch pipe 404, a second flow metering valve 405, an upper branch pipe 406, and a third flow metering valve 407. The dosing pipe 401 is located at the top of the storage tank 4, and the first flow metering valve 402 is located on the outside of the dosing pipe 401. The first flow metering valve 402 is electrically connected to the control panel 3. The injection pipe 403 is located at the bottom of the storage tank 4, and the lower branch pipe 404 is located at the bottom of the injection pipe 403. The bottom of the lower branch pipe 404 is located at the top of the lower mixing hopper 2 and is connected to the second annular cavity 11. The second flow metering valve 405 is located on the outside of the lower branch pipe 404 and is electrically connected to the control panel 3. The upper branch pipe 406 is located at the bottom of the injection pipe 403. The bottom end of 406 is connected to the first annular cavity 5. A third flow metering valve 407 is provided on the outside of the upper branch pipe 406. The third flow metering valve 407 is electrically connected to the control panel 3. The density regulator is injected into the storage tank 4 through the dosing pipe 401. The injection flow rate is monitored in real time by the first flow metering valve 402. The control panel 3 flexibly controls the opening and closing of the first flow metering valve 402 according to the set adjustment dosage. The regulator in the storage tank 4 is transported to the lower branch pipe 404 and the upper branch pipe 406 through the injection pipe 403. The regulator is injected into the second annular cavity 11 through the lower branch pipe 404. The adjustment dosage injected into the lower branch pipe 404 is monitored and controlled in real time by the second flow metering valve 405. The regulator is injected into the first annular cavity 5 through the upper branch pipe 406. The adjustment dosage injected into the upper branch pipe 406 is monitored and controlled in real time by the third flow metering valve 407.

[0024] Please see Figure 4 In this embodiment, the mixing assembly includes a rotary motor 301, a mixing shaft 302, and a mixing paddle 303. The rotary motor 301 is installed at the top outer side of the upper mixing tank 1 and is electrically connected to the control panel 3. The mixing shaft 302 is rotatably connected to the top inner side of the upper mixing tank 1. The output end of the rotary motor 301 is connected to the mixing shaft 302. The turntable 6 is located on the outer side of the top of the mixing shaft 302. Multiple sets of mixing paddles 303 are distributed in a ring at equal intervals on the outer side of the mixing shaft 302. The rotary motor 301 is controlled to operate through the control panel 3. The rotary motor 301 drives the mixing shaft 302 to rotate. The rotating mixing shaft 302 drives the turntable 6 and the mixing paddles 303 to rotate synchronously. The mixing paddles 303 are used to mix and agitate the cement slurry.

[0025] Please see Figure 1 and Figure 2In this embodiment, a feed hopper 101 is connected to the top of the upper mixing tank 1, and a discharge pipe 201 is provided at the bottom of the lower mixing tank 2. The rear end of the discharge pipe 201 is inclined downward. A drive motor 202 is provided at the front end of the outer side of the discharge pipe 201. The drive motor 202 is electrically connected to the control panel 3. A discharge auger 203 is provided on the inner side of the discharge pipe 201. The output end of the drive motor 202 is electrically connected to the drive mechanism of the discharge auger 203. The raw materials for cement slurry preparation are injected into the upper mixing tank 1 through the feed hopper 101. The drive motor 202 is controlled to run by the control panel 3. The drive motor 202 drives the discharge auger 203 to run, and the discharge auger 203 discharges the cement slurry from the discharge pipe 201.

[0026] Before adjusting the density, the lifting mechanism 9 is controlled by the control panel 3 to move the annular sealing plate 10 downward, so that the annular sealing plate 10 separates the lower mixing hopper 2 into the second annular cavity 11. Then, the cement slurry preparation raw materials are injected into the upper mixing tank 1 through the feed hopper 101, so that the cement slurry raw materials are injected into the lower mixing hopper 2 through the upper mixing tank 1. The adjustment dosage to be added is set by the control panel 3, and the adjustment dosage added to the storage tank 4 from the dosing pipe 401 is monitored in real time by the first flow metering valve 402, so that a certain amount of density regulator is stored in the storage tank 4. Then, the second flow metering valve 405 is controlled by the control panel 3 to open the lower branch pipe 404, so that half of the regulator in the storage tank 4 flows through the injection pipe 403 through the lower branch pipe 404, and this part of the regulator is injected into the second annular cavity 11 through the lower branch pipe 404.

[0027] When adjusting the density, the control panel 3 controls the rotating motor 301 to drive the stirring shaft 302 to rotate. The rotating stirring shaft 302 drives the turntable 6 and the stirring paddle 303 to rotate synchronously. The stirring paddle 303 is used to mix and agitate the cement slurry. The lifting mechanism 9 controls the annular sealing plate 10 to move upward into the annular receiving cavity 8. At this time, the regulator in the second annular cavity 11 is released into the lower mixing hopper 2 for mixing. At the same time, the control panel 3 controls the third flow metering valve 407 to open the upper branch pipe 406. At this time, the second flow metering valve 405 closes the lower branch pipe 404, so that the remaining half of the regulator in the storage tank 4 flows through the injection pipe 403 through the upper branch pipe 406 and is injected into the first annular cavity 5 through the upper branch pipe 406. The turntable 6 is rotated so that the regulator in the first annular cavity 5 is spun out through the injection hole 7 and added to the cement slurry in the lower mixing hopper 2.

[0028] Finally, the control panel 3 is used to control the operation of the drive motor 202, which in turn drives the discharge auger 203 to operate, and the discharge auger 203 is used to discharge the cement slurry from the discharge pipe 201.

[0029] Through the above steps, cement slurry raw materials are injected into the lower mixing hopper 2 by setting the upper mixing tank 1. A certain amount of density regulator is stored in the storage tank 4. The density regulator in the storage tank 4 is added to the first annular cavity 5 and the second annular cavity 11 by the injection component. When the stirring component rotates, it drives the turntable 6 to rotate synchronously. The rotation of the turntable 6 causes the regulator in the first annular cavity 5 to be spiraled out through the injection hole 7 and added to the cement slurry in the lower mixing hopper 2. The height of the annular sealing plate 10 is adjusted by the lifting mechanism 9, and the annular sealing plate 10 is moved up to be stored in the annular receiving cavity 8. At this time, the regulator in the second annular cavity 11 is released into the lower mixing hopper 2. The stirring component is driven by the control panel 3 to operate. The stirring component mixes the cement slurry in the lower mixing hopper 2, so that the density regulator is added into the device from various positions, ensuring that the additive and cement slurry are fully mixed and accelerating the mixing and penetration time of the regulator.

[0030] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A cement slurry density adjusting device, comprising an upper mixing tank (1), a control panel (3), and a mixing assembly, characterized in that: It also includes a lower mixing hopper (2), a storage tank (4), an injection assembly, a first annular cavity (5), a turntable (6), an injection hole (7), an annular receiving cavity (8), a lifting mechanism (9), an annular sealing plate (10), and a second annular cavity (11). The lower mixing hopper (2) is provided at the bottom of the upper mixing tank (1). A control panel (3) is provided on the outside of the upper mixing tank (1). A stirring assembly is provided on the inside of the upper mixing tank (1). A storage tank (4) is provided above the upper mixing tank (1). An injection assembly is provided on the outside of the storage tank (4). The upper mixing tank (1) has a first annular cavity (5) on the inner side of the top. A turntable (6) is provided at the bottom of the first annular cavity (5). A number of injection holes (7) are provided on one side of the turntable (6) in an annular shape at equal intervals. An annular receiving cavity (8) is provided on the inner wall of the upper mixing tank (1). A number of lifting mechanisms (9) are distributed in an annular shape at equal intervals on the inner side of the annular receiving cavity (8). An annular sealing plate (10) is provided on the inner side of the annular receiving cavity (8). The lower mixing hopper (2) is closed by the annular sealing plate (10) to form a second annular cavity (11).

2. The cement slurry density adjusting device according to claim 1, characterized in that: The outer diameter of the top of the lower mixing hopper (2) is larger than the bottom of the upper mixing tank (1). The turntable (6) is rotatably connected to the upper mixing tank (1). The control panel (3) is electrically connected to the drive mechanism of the lifting mechanism (9). The annular sealing plate (10) is lifted by the lifting mechanism (9). The lifting mechanism (9) adopts any one of the following: ball screw, electric push rod, electric cylinder, linear motor, cylinder mechanism or hydraulic cylinder.

3. The cement slurry density adjusting device according to claim 1, characterized in that: The injection assembly includes an injection pipe (401), a first flow metering valve (402), and an injection pipe (403). The top of the storage tank (4) is provided with an injection pipe (401), and the outside of the injection pipe (401) is provided with a first flow metering valve (402). The first flow metering valve (402) is electrically connected to the control panel (3), and the bottom of the storage tank (4) is provided with an injection pipe (403).

4. The cement slurry density adjusting device according to claim 3, characterized in that: The injection assembly also includes a lower branch pipe (404) and a second flow metering valve (405). The lower branch pipe (404) is provided at the bottom end of the injection pipe (403). The bottom end of the lower branch pipe (404) is located at the top of the lower mixing hopper (2). The lower branch pipe (404) is connected to the second annular cavity (11). The second flow metering valve (405) is provided on the outside of the lower branch pipe (404). The second flow metering valve (405) is electrically connected to the control panel (3).

5. The cement slurry density adjusting device according to claim 4, characterized in that: The injection assembly also includes an upper branch pipe (406) and a third flow metering valve (407). The lower end of the injection pipe (403) is provided with the upper branch pipe (406), and the lower end of the upper branch pipe (406) is connected to the first annular cavity (5). The outer side of the upper branch pipe (406) is provided with the third flow metering valve (407), and the third flow metering valve (407) is electrically connected to the control panel (3).

6. The cement slurry density adjusting device according to claim 1, characterized in that: The mixing assembly includes a rotary motor (301), a mixing shaft (302), and a mixing paddle (303). The rotary motor (301) is installed at the top outer side of the upper mixing tank (1). The rotary motor (301) is electrically connected to the control panel (3). The mixing shaft (302) is rotatably connected to the top inner side of the upper mixing tank (1). The output end of the rotary motor (301) is connected to the mixing shaft (302). The turntable (6) is located on the outer side of the top of the mixing shaft (302). Multiple sets of mixing paddles (303) are distributed in a ring at equal intervals on the outer side of the mixing shaft (302).

7. The cement slurry density adjusting device according to claim 1, characterized in that: The top of the upper mixing tank (1) is connected to the feed hopper (101), and the bottom of the lower mixing hopper (2) is provided with a discharge pipe (201). The rear end of the discharge pipe (201) is inclined downward. The front end of the outer side of the discharge pipe (201) is provided with a drive motor (202). The drive motor (202) is electrically connected to the control panel (3). The inner side of the discharge pipe (201) is provided with a discharge auger (203). The output end of the drive motor (202) is electrically connected to the drive mechanism of the discharge auger (203).

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