Drilling fluid depositing tank

Abstract

The utility model relates to the technical field of drilling fluid treatment, and discloses a drilling fluid settling tank which comprises a tank body, the liquid inlet pipe is arranged at the top of the tank body and is used for feeding drilling fluid into the tank body; one end of the vacuum water pump is fixedly connected with a hose and is connected into the tank body; the closing assembly is arranged in the liquid inlet pipe and used for closing the tank body, the closing assembly comprises a transmission block, a clamping ring and a clamping block, the transmission block is in sliding connection with the liquid inlet pipe, the clamping ring is fixedly connected with the liquid inlet pipe, the clamping block is elastically connected with the liquid inlet pipe, one end of the clamping block abuts against the clamping ring, and the transmission block abuts against the clamping block. The transmission block drives the push rod to relieve the downward force on the clamping block, at the moment, the elastic piece pushes the clamping block upwards through the characteristics of the elastic piece, the clamping block makes close contact with the clamping ring, the sealing ring is tightly connected with the clamping ring so that the interior of the tank body can be sealed, and the situation that crude oil volatilizes in air and pollutes the environment is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling fluid treatment, and specifically relates to a drilling fluid settling tank. Background Technique

[0002] In the oil drilling and cementing construction, a mud cake with a thickness of 1-5 millimeters will be formed on the wellbore of the permeable formation. Since these adhered muds and the formed mud cake have an obvious layered structure and cannot be well cemented with the cement slurry, the curability is very poor, forming a weak interface for cementing. Under the condition of the existence of oil, gas and water with underground activities, these weak interfaces will form channels for the flow of oil, gas and water. As time goes by, the cementing of the first interface and the second interface becomes significantly worse, resulting in a significant decline in the cementing quality.

[0003] After retrieval, the document with the publication number (CN212548436U) discloses a settling tank for oil drilling fluid additives, including a tank body. A first partition is provided in the tank body, which vertically divides the tank body into a first cavity and a second cavity. Its upper end is connected to the top of the tank body, and its lower end is suspended in the tank body; in the first cavity, a plurality of first drainage plates are arranged downward and obliquely on the first partition; corresponding to the first drainage plates in the first cavity, on the side wall of the tank body.

[0004] By arranging the liquid inlet and the liquid outlet at the upper parts of the first cavity and the second cavity respectively, the above device forms a longer fluid channel; and a plurality of first drainage plates and second drainage plates are arranged at intervals and staggered in the first cavity, so that the solid-liquid mixture is repeatedly buffered by each layer of drainage plates and the first partition, reducing the flow rate and slowly releasing the impact on the bottom sediment, thereby effectively preventing the solid particles in the oil drilling fluid additives from being carried back to the liquid outlet by the backflow. However, during the sedimentation process, the petroleum crude oil in the drilling fluid will vaporize and volatilize, and the volatilized petroleum crude oil in the air will pollute the environment.

[0005] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0006] In order to solve the technical problem of petroleum crude oil volatilization, the basic concept of the technical solution adopted by the present utility model is:

[0007] A drilling fluid sedimentation tank, comprising a tank body; a liquid inlet pipe, which is arranged at the top of the tank body and is used to send drilling fluid into the tank body; a vacuum water pump, one end of the vacuum water pump is fixedly connected with a hose and is connected to the inside of the tank body; a stirring rod, which is in transmission connection with the tank body; a closing assembly, which is arranged in the liquid inlet pipe and is used to seal the tank body, the closing assembly includes a transmission block, a clamping ring and a clamping block, the transmission block is slidably connected with the liquid inlet pipe, the clamping ring is fixedly connected with the liquid inlet pipe, the clamping block is elastically connected with the liquid inlet pipe, one end of the clamping block abuts against the clamping ring, and the transmission block abuts against the clamping block; a lifting assembly, which is arranged between the tank body and the vacuum water pump and is used to adjust the position of one end of the hose located inside the tank body.

[0008] As a preferred embodiment of the present utility model, the closing assembly further includes a guide rod and a support block, the support block is fixedly connected with the inner wall of the liquid inlet pipe, the guide rod is fixedly connected with the support block, the clamping block is slidably connected with the guide rod, and the clamping block is elastically connected with the support block.

[0009] As a preferred embodiment of the present utility model, the closing assembly further includes an elastic member, one end of the elastic member is fixedly connected with the clamping block, the other end of the elastic member is fixedly connected with the support block, and the elastic member includes but is not limited to a spring.

[0010] As a preferred embodiment of the present utility model, the closing assembly further includes a push rod, one end of the push rod is fixedly connected with the transmission block, the other end of the transmission block abuts against the clamping block, a sealing pad is installed on the surface of the clamping block, and a plurality of through holes are formed on the surface of the transmission block.

[0011] As a preferred embodiment of the present utility model, the closing assembly further includes a slider, the inner wall of the liquid inlet pipe is symmetrically provided with a chute, the transmission block is symmetrically and fixedly connected with the slider, and the slider is slidably connected with the chute.

[0012] As a preferred embodiment of the present utility model, the lifting assembly includes a servo motor, a threaded rod and a lifting frame, the servo motor is fixedly connected with the tank body, the threaded rod is fixedly connected with the output shaft of the servo motor, the lifting frame is threadedly connected with the threaded rod, and one end of the hose is fixedly connected with the lifting frame.

[0013] As a preferred embodiment of the present utility model, the lifting assembly further includes a support, the support is fixedly connected with the inner wall of the tank body, the threaded rod is rotatably connected with the support, and the lifting frame is slidably connected with the support.

[0014] As a preferred embodiment of the present utility model, a driving motor is arranged at the bottom of the tank body, the driving motor is fixedly connected with the tank body, and the stirring rod is fixedly connected with the output shaft of the driving motor.

[0015] The present utility model has the following beneficial effects compared with the prior art:

[0016] 1. A drilling fluid sedimentation tank. When the drilling fluid is poured in, the transmission block loses its force, and the transmission block drives the push rod to release the downward force on the card block. At this time, the elastic member pushes the card block upward by its own characteristics, and the card block is in close contact with the card ring. The sealing ring is tightly connected with the card ring to seal the interior of the tank body, so as to prevent the volatilization of crude oil in the air and pollute the environment.

[0017] 2. In this drilling fluid sedimentation tank, the servo motor drives the threaded rod to rotate and drives the lifting frame to rise and fall, and adjusts the position of the hose in the tank. At this time, the vacuum water pump extracts the crude oil and drilling fluid impurities in the tank through the hose.

[0018] 3. A drilling fluid sedimentation tank, in which a driving motor drives the stirring rod to rotate to generate centrifugal force, and physically separates the drilling fluid impurities as the continuous phase from the petroleum crude oil as the dispersed phase. The greater the density difference between the dispersed phase and the continuous phase, the easier it is to separate the two phases. Similar to the situation in a gravitational field, under the condition of a certain density difference between the two phases, the larger the particle diameter of the dispersed phase, the greater the speed difference between the two phases in the reverse direction when the equilibrium state is reached in the gravitational field, thereby quickly separating the drilling fluid impurities and the petroleum crude oil.

[0019] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the attached picture:

[0021] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0022] Figure 2 This is a cross-sectional view of the utility model;

[0023] Figure 3 This is a cross-sectional schematic diagram of the liquid inlet pipe of the utility model;

[0024] Figure 4 This is a working diagram of the servo motor of the utility model driving the hose to rise and fall;

[0025] Figure 5 This is a schematic diagram of the internal structure of the liquid inlet pipe of the utility model.

[0026] In the figure: 1. tank body; 2. liquid inlet pipe; 3. vacuum water pump; 31. hose; 4. servo motor; 41. threaded rod; 42. lifting frame; 43. support; 5. drive motor; 51. stirring rod; 6. transmission block; 61. push rod; 62. slider; 7. retaining ring; 71. clamping block; 72. guide rod; 73. support block; 74. elastic member. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model.

[0028] Please refer to Figures 1-5 , a drilling fluid sedimentation tank, comprising a tank body 1; a liquid inlet pipe 2, which is arranged at the top of the tank body 1 and is used to send drilling fluid into the tank body 1; a vacuum water pump 3, one end of the vacuum water pump 3 is fixedly connected with a hose 31 and is connected to the inside of the tank body 1; a stirring rod 51, the stirring rod 51 is in transmission connection with the tank body 1; a closing assembly, the closing assembly is arranged in the liquid inlet pipe 2 and is used to seal the tank body 1. The closing assembly includes a transmission block 6, a clamping ring 7, and a clamping block 71. The transmission block 6 is slidably connected to the liquid inlet pipe 2, the clamping ring 7 is fixedly connected to the liquid inlet pipe 2, the clamping block 71 is elastically connected to the liquid inlet pipe 2, one end of the clamping block 71 abuts against the clamping ring 7, and the transmission block 6 abuts against the clamping block 71. The closing assembly further includes a guide rod 72 and a support block 73. The support block 73 is fixedly connected to the inner wall of the liquid inlet pipe 2, the guide rod 72 is fixedly connected to the support block 73, the clamping block 71 is slidably connected to the guide rod 72, and the clamping block 71 is elastically connected to the support block 73. The closing assembly further includes an elastic member 74. One end of the elastic member 74 is fixedly connected to the clamping block 71, and the other end of the elastic member 74 is fixedly connected to the support block 73. The elastic member 74 includes but is not limited to a spring. The closing assembly further includes a push rod 61. One end of the push rod 61 is fixedly connected to the transmission block 6, and the other end of the transmission block 6 abuts against the clamping block 71. A sealing gasket is installed on the surface of the clamping block 71, and a plurality of through holes are formed on the surface of the transmission block 6. The closing assembly further includes a slider 62. The inner wall of the liquid inlet pipe 2 is symmetrically provided with sliding grooves, and the transmission block 6 is symmetrically and fixedly connected with the slider 62. The slider 62 is slidably connected to the sliding groove; a lifting assembly, the lifting assembly is arranged between the tank body 1 and the vacuum water pump 3 and is used to adjust the position of one end of the hose 31 inside the tank body 1. The pipeline is sent into the liquid inlet pipe 2 manually, and the transmission block 6 is pushed downward by the pipeline. The transmission block 6 drives the push rod 61 to push the clamping block 71 downward, so that the clamping block 71 is separated from the clamping ring 7. At this time, the drilling fluid enters the tank body 1 through the liquid inlet pipe 2. When the filling of the drilling fluid ends, the transmission block 6 loses the acting force, and the transmission block 6 drives the push rod 61 to release the downward force on the clamping block 71. At this time, the elastic member 74 pushes the clamping block 71 upward through its own characteristics, and the clamping block 71 is in close contact with the clamping ring 7. The inside of the tank body 1 is sealed by tightly connecting with the clamping ring 7 through the sealing ring, avoiding the volatilization of petroleum crude oil in the air and polluting the environment.

[0029] Among them, the lifting assembly includes a servo motor 4, a threaded rod 41, and a lifting frame 42. The servo motor 4 is fixedly connected to the tank body 1. The threaded rod 41 is fixedly connected to the output shaft of the servo motor 4. The lifting frame 42 is threadedly connected to the threaded rod 41. One end of the hose 31 is fixedly connected to the lifting frame 42. The lifting assembly further includes a support 43. The support 43 is fixedly connected to the inner wall of the tank body 1. The threaded rod 41 is rotatably connected to the support 43. The lifting frame 42 is slidably connected to the support 43. The servo motor 4 drives the threaded rod 41 to rotate to drive the lifting frame 42 to lift, so as to adjust the position of the hose 31 in the tank body 1. At this time, the vacuum water pump 3 pumps out the petroleum crude oil and drilling fluid impurities in the tank body 1 through the hose 31 respectively.

[0030] Among them, a driving motor 5 is provided at the bottom of the tank body 1. The driving motor 5 is fixedly connected to the tank body 1. The stirring rod 51 is fixedly connected to the output shaft of the driving motor 5. The driving motor 5 drives the stirring rod 51 to rotate to generate a centrifugal force, which is a device for physically separating the drilling fluid impurities as the continuous phase from the petroleum crude oil as the dispersed phase. The greater the density difference between the dispersed phase and the continuous phase, the easier it is to separate the two phases. Similar to the situation in the gravitational field, under the condition that the density difference between the two phases is certain, the larger the particle diameter of the dispersed phase, the greater the velocity difference of the reverse movement between the two phases when reaching the equilibrium state in the gravitational field, so as to quickly separate the drilling fluid impurities from the petroleum crude oil.

[0031] Working principle: Manually send the pipeline into the liquid inlet pipe 2. Push the transmission block 6 downward through the pipeline. The transmission block 6 drives the push rod 61 to push the clamping block 71 downward, so that the clamping block 71 is separated from the clamping ring 7. At this time, the drilling fluid enters the tank body 1 through the liquid inlet pipe 2. When the filling of the drilling fluid ends, the transmission block 6 loses the acting force. The transmission block 6 drives the push rod 61 to release the downward force on the clamping block 71. At this time, the elastic member 74 pushes the clamping block 71 upward through its own characteristics. The clamping block 71 is in close contact with the clamping ring 7. It is tightly connected to the clamping ring 7 through the sealing ring to seal the inside of the tank body 1, avoiding the pollution of the environment caused by the volatilization of petroleum crude oil in the air. The driving motor 5 drives the stirring rod 51 to rotate to generate a centrifugal force, which is a device for physically separating the drilling fluid impurities as the continuous phase from the petroleum crude oil as the dispersed phase. The greater the density difference between the dispersed phase and the continuous phase, the easier it is to separate the two phases. Similar to the situation in the gravitational field, under the condition that the density difference between the two phases is certain, the larger the particle diameter of the dispersed phase, the greater the velocity difference of the reverse movement between the two phases when reaching the equilibrium state in the gravitational field, so as to quickly separate the drilling fluid impurities from the petroleum crude oil. At this time, the servo motor 4 drives the threaded rod 41 to rotate to drive the lifting frame 42 to lift, so as to adjust the position of the hose 31 in the tank body 1. At this time, the vacuum water pump 3 pumps out the petroleum crude oil and drilling fluid impurities in the tank body 1 through the hose 31 respectively.

[0032] It can be understood that the present utility model is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent substitutions can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A drilling fluid sedimentation tank, characterized in that: include: Tank body (1); A liquid inlet pipe (2), which is arranged at the top of the tank body (1) and is used to deliver drilling fluid into the tank body (1); A vacuum water pump (3), one end of which is fixedly connected to a hose (31) and connected to the interior of the tank body (1); A stirring rod (51), the stirring rod (51) is drivingly connected to the tank body (1); A closing component, the closing component is arranged in the liquid inlet pipe (2) and is used to seal the tank body (1), the closing component comprises a transmission block (6), a clamping ring (7) and a clamping block (71), the transmission block (6) is slidably connected to the liquid inlet pipe (2), the clamping ring (7) is fixedly connected to the liquid inlet pipe (2), the clamping block (71) is elastically connected to the liquid inlet pipe (2), one end of the clamping block (71) abuts against the clamping ring (7), and the transmission block (6) abuts against the clamping block (71); A lifting component is arranged between the tank body (1) and the vacuum water pump (3) and is used to adjust the position of one end of the hose (31) within the tank body (1).

2. The drilling fluid settling tank according to claim 1, characterized in that: The closing assembly further comprises a guide rod (72) and a support block (73), the support block (73) being fixedly connected to the inner wall of the liquid inlet pipe (2), the guide rod (72) and the support block (73) being fixedly connected, the clamping block (71) being slidably connected to the guide rod (72), and the clamping block (71) being elastically connected to the support block (73).

3. The drilling fluid settling tank according to claim 1, characterized in that: The closing assembly further comprises an elastic member (74), one end of the elastic member (74) is fixedly connected to the clamping block (71), and the other end of the elastic member (74) is fixedly connected to the supporting block (73), and the elastic member (74) comprises but is not limited to a spring.

4. The drilling fluid settling tank according to claim 1, characterized in that: The closing assembly further comprises a push rod (61), one end of which is fixedly connected to the transmission block (6), the other end of which abuts against a clamping block (71), a sealing gasket is installed on the surface of the clamping block (71), and a plurality of through holes are provided on the surface of the transmission block (6).

5. The drilling fluid settling tank according to claim 1, characterized in that: The closing component also includes a slider (62). The inner wall of the liquid inlet pipe (2) is symmetrically provided with a slide groove. The slider (62) is symmetrically fixedly connected to the transmission block (6). The slider (62) is slidably connected to the slide groove.

6. The drilling fluid settling tank according to claim 1, characterized in that: The lifting assembly comprises a servo motor (4), a threaded rod (41), and a lifting frame (42); the servo motor (4) is fixedly connected to the tank body (1); the threaded rod (41) is fixedly connected to the output shaft of the servo motor (4); the lifting frame (42) is threadedly connected to the threaded rod (41); and one end of the hose (31) is fixedly connected to the lifting frame (42).

7. The drilling fluid settling tank according to claim 6, characterized in that: The lifting assembly also includes a support (43), the support (43) is fixedly connected to the inner wall of the tank body (1), the threaded rod (41) is rotatably connected to the support (43), and the lifting frame (42) is slidably connected to the support (43).

8. The drilling fluid settling tank according to claim 1, characterized in that: A driving motor (5) is provided at the bottom of the tank body (1), the driving motor (5) is fixedly connected to the tank body (1), and the stirring rod (51) is fixedly connected to the output shaft of the driving motor (5).

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