Leaking stoppage liquid delivery pump

Abstract

A leaking stoppage liquid delivery pump comprises a power end, a fluid end, a lubricating system and a cooling system, the fluid end comprises a pump head, a liquid suction pipeline and a liquid drainage pipeline, the pump head comprises a body, a liquid suction valve and a liquid drainage valve, the liquid suction valve and the liquid drainage valve are installed in a liquid suction port and a liquid drainage port in the body respectively, the liquid suction pipeline is communicated with the liquid suction port, and the liquid drainage pipeline is communicated with the liquid drainage port. Each of the liquid suction valve and the liquid discharge valve comprises an annular valve seat, an annular sealing seat and an annular guide seat which are coaxially arranged from bottom to top, the lower end of the annular sealing seat is embedded in the upper part of the annular valve seat, the upper end of the annular valve seat is in threaded connection with the annular guide seat, and the upper end of the annular sealing seat is embedded in the annular guide seat; the annular sealing seat is pressed on the upper part of the annular valve seat through the annular guide seat; a valve ball capable of moving up and down and freely rotating is arranged in the annular guide seat; when the valve ball falls to be tightly attached to the upper end of the annular sealing seat, the pump valve is closed; the closed end of the liquid suction pipeline is connected with the leaking stoppage liquid box through a backflow pipeline, and a backflow valve is arranged on the backflow pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling plugging liquid delivery, in particular to a plugging liquid delivery pump. Background Art

[0002] During the oil drilling process, well leakage exists for a long time. In order to ensure the normal progress of the drilling process, it is necessary to inject the plugging liquid into the well through the mud pump to plug the leakage point; the main components of the plugging liquid are: water, sawdust, bentonite, profile adjustment fluid, cotton seeds, walnut skins, stones, etc., among which the walnut skins are the size of a fingernail and the longest stones are 25mm; the existing mud pump valve core and valve seat are sealed by a conical sealing surface. During the working process, after the valve core and valve seat are opened, the above-mentioned debris contained in the plugging liquid is easily attached to the sealing surface. When closed, the sealing surface is easily separated by the debris attached thereto, causing the valve core and valve seat to be unable to be completely closed, so that the mud pump cannot work normally and needs frequent maintenance. Secondly, the suction pipeline of the mud pump is open at one end and closed at the other end. During the plugging liquid transportation process, the impurities contained in the plugging liquid often precipitate and accumulate at the closed end, resulting in the blockage of the pump head inlet near the closed end of the suction pipeline, resulting in poor suction of the plugging liquid. The above problems affect the normal operation of the mud pump and require shutdown for cleaning, which is not only labor-intensive but also reduces the working efficiency of the mud pump. Utility Model Content

[0003] The utility model provides a plugging liquid delivery pump to overcome the shortcomings of the prior art.

[0004] The technical scheme adopted by the utility model is: a plugging liquid delivery pump, including a power end hydraulic end, a lubrication system and a cooling system, the hydraulic end includes a pump head, a suction pipeline and a discharge pipeline, the pump head includes a body, a suction valve, and a discharge valve, the suction valve and the discharge valve are respectively installed in the suction port and the discharge port in the body, the suction pipeline is connected with the suction port, the discharge pipeline is connected with the discharge port, the suction valve and the discharge valve both include an annular valve seat, an annular sealing seat, which are coaxially arranged from bottom to top, An annular guide seat, the lower end of the annular sealing seat is embedded in the upper part of the annular valve seat, the upper end of the annular valve seat is threadedly connected with the annular guide seat, and the upper end of the annular sealing seat is embedded in the annular guide seat, and the annular sealing seat is pressed onto the upper part of the annular valve seat through the annular guide seat; a valve ball that can move up and down and rotate freely is installed in the annular guide seat, and the pump valve is closed when the valve ball falls and fits tightly against the upper end of the annular sealing seat; the closed end of the liquid suction pipeline is connected to the leak-proof liquid tank through a reflux pipeline, and a reflux valve is provided on the reflux pipeline.

[0005] The closed end of the liquid suction pipeline is also provided with a flushing valve.

[0006] The upper end surface of the annular sealing seat is a conical surface, and the bottom of the conical surface protrudes inward to form a conical sealing surface; the conical angle α of the conical sealing surface is 64°-66°, and the height H is 2-3 mm; when the valve ball falls and fits tightly against the conical sealing surface, the pump valve is closed.

[0007] The upper part of the annular guide seat is evenly distributed with notches, so that a number of symmetrically arranged guide columns are formed on the upper part of the annular guide seat. The cross-section of the guide column is an isosceles triangle structure with the sharp corner facing inward, and the sharp corner is chamfered to form a vertical guide surface, and the vertical guide surface protrudes from the inner diameter of the bottom of the annular guide seat; the valve ball is guided by the vertical guide surface when moving up and down.

[0008] The upper end of the annular sealing seat is embedded in the inner diameter of the bottom of the annular guide seat. The outer diameter of the annular sealing seat is provided with a shoulder, and the lower end of the annular guide seat abuts against the shoulder.

[0009] The annular sealing seat is a non-metallic structure.

[0010] A sealing ring is arranged between the outer diameter of the annular sealing seat and the annular valve seat.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. When the utility model is working, the valve ball moves up and down in the guide seat while rotating. The valve ball rotates automatically to remove the debris on the sealing surface of the sealing seat, so that the sealing surface of the sealing seat is always kept clean, ensuring that the pump valve is completely closed and realizing the continuous delivery of the plugging liquid; and the upper part of the guide seat is evenly distributed with large notches, which is convenient for the debris in the plugging liquid to pass smoothly, ensuring that the plugging liquid delivery channel is unobstructed.

[0013] 2. The utility model connects the closed end of the suction pipeline with the plugging liquid tank through a reflux pipeline, and controls it through a reflux valve to effectively discharge the plugging liquid impurities precipitated and accumulated at the closed end of the suction pipeline, thereby ensuring the continuous operation of the plugging liquid delivery pump, reducing the maintenance frequency, reducing labor intensity, and improving the working efficiency of the plugging liquid delivery pump; and the plugging liquid refluxed to the plugging liquid tank can re-enter the plugging liquid delivery pump from the suction pipeline, reducing the waste of plugging liquid.

[0014] 3. The utility model provides a flushing valve at the closed end of the suction pipeline to facilitate the discharge of cleaning liquid in the reflux pipeline and the suction pipeline.

[0015] 4. The utility model arranges the driving motor above the power end and the lubricating liquid tank below the power end, which has a compact structure, saves installation area, and is conducive to skid-mounted use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a top view of the structure of an embodiment of the utility model;

[0017] Figure 2 It is a left side view of the structure of an embodiment of the utility model;

[0018] Figure 3 This is a cross-sectional view of the hydraulic end structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the hydraulic end of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the liquid suction valve and liquid discharge valve of the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the annular sealing seat of the utility model;

[0022] Figure 7 It is a structural schematic diagram of the annular guide seat of the utility model. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-7 The utility model is described in detail with specific implementation modes.

[0024] A plugging liquid delivery pump, comprising a power end 16, a hydraulic end 17, a lubrication system 15 and a cooling system 19, wherein the hydraulic end 17 comprises a pump head 6, a liquid suction pipeline 7 and a liquid discharge pipeline 8, wherein the pump head 6 comprises a body 9, a liquid suction valve 10 and a liquid discharge valve 11, wherein the liquid suction valve 10 and the liquid discharge valve 11 are respectively installed in the liquid suction port and the liquid discharge port in the body 9, wherein the liquid suction pipeline 7 is connected to the liquid suction port, the liquid discharge pipeline 8 is connected to the liquid discharge port, and the liquid suction valve 10 and the liquid discharge valve 11 both comprise a bottom The annular valve seat 1, annular sealing seat 2 and annular guide seat 3 are coaxially arranged above, the lower end of the annular sealing seat 2 is embedded in the upper part of the annular valve seat 1, the upper end of the annular valve seat 1 is threadedly connected with the annular guide seat 3, and the upper end of the annular sealing seat 2 is embedded in the annular guide seat 3, and the annular sealing seat 2 is pressed onto the upper part of the annular valve seat 1 through the annular guide seat 3; the annular guide seat 3 is equipped with a valve ball 4 which can move up and down and rotate freely, and when the valve ball 4 falls and fits tightly against the upper end of the annular sealing seat 2, the pump valve is closed.

[0025] Further, the closed end of the liquid suction pipeline 7 is connected to the plugging liquid tank 20 through the return pipeline 12, and the return pipeline 12 is provided with a return valve 13. The closed end of the liquid suction pipeline 7 is also provided with a flushing valve 14. Specifically, the return pipeline 12 and the flushing valve 14 are connected to the closed end of the liquid suction pipeline 7 through a tee.

[0026] Furthermore, the upper end surface of the annular sealing seat 2 is a conical surface 2-2, which ensures smooth inflow and outflow of the plugging liquid; the bottom of the conical surface 2-2 protrudes inward to form a conical sealing surface 2-1; the conical angle α of the conical sealing surface is 64°-66°, and the height H is 2-3 mm; when the valve ball 4 falls and fits closely with the conical sealing surface 2-1, the pump valve is closed. By reducing the close contact area between the valve ball 4 and the upper end of the annular sealing seat 2 after the valve ball 4 falls, the sealing effect is improved, the processing accuracy is reduced, and the yield rate is improved.

[0027] In one embodiment (refer to Figure 6 ), the cone angle α is preferably 65°, and the H is preferably 2.5 mm.

[0028] Furthermore, the annular sealing seat 2 is a non-metallic structure, preferably made of polyurethane, to reduce wear of the valve ball 4 and ensure a sealing effect.

[0029] Furthermore, a sealing ring 5 is provided between the outer diameter of the annular sealing seat 2 and the annular valve seat 1 to ensure a sealing effect.

[0030] Furthermore, the annular guide seat 3 has evenly distributed notches 3-1 on the upper part, so that a plurality of symmetrically arranged guide columns 3-2 are formed on the upper part of the annular guide seat 3. The cross section of the guide column 3-2 is an isosceles triangle structure with the sharp corner facing inward, and the sharp corner is chamfered to form a vertical guide surface 3-3, and the vertical guide surface 3-3 protrudes from the inner diameter of the bottom of the annular guide seat 3. When the valve ball 4 moves up and down, it is guided by the vertical guide surface 3-3, which reduces the contact area between the annular guide seat 3 and the valve ball 4, reduces the friction force, and facilitates the up and down movement of the valve ball 4. The upper end of the annular sealing seat 2 is embedded in the inner diameter of the bottom of the annular guide seat 3, and the outer diameter of the annular sealing seat 2 has a shoulder 2-3, and the lower end of the annular guide seat 3 abuts against the shoulder 2-3.

[0031] In one embodiment (refer to Figure 5 ), the upper part of the valve seat 1 is provided with an annular recess 1-2 and a first internal thread 1-1, the lower part of the guide frame 3 is provided with an external thread 3-4, the first internal thread 1-1 is threadedly connected with the external thread 3-4; the lower end of the annular sealing seat 2 is embedded in the annular recess 1-2.

[0032] In order to facilitate the disassembly of the utility model, a second internal thread 1-3 is provided at the lower part of the inner cavity of the annular valve seat 1. The utility model can be disassembled from the pump head by threading a disassembly tool with the second internal thread 1-3.

[0033] During the working process of the utility model, when the suction valve 10 and the discharge valve 11 are opened and closed, since the plugging liquid contains various impurities, each point in the flow process contains different impurities, and the specific gravity and flow rate are also different. Therefore, the valve ball 4 will rotate under the action of the plugging liquid during the lifting and falling process. When the valve ball falls to the conical sealing surface 2-1, the impurities on the sealing surface are automatically cleaned (scraped) away by the self-rotation of the valve ball, so that the sealing surface of the sealing seat is always kept clean, ensuring that the pump valve is completely closed, and realizing continuous delivery of the plugging liquid.

[0034] In one embodiment (refer to Figure 1 ), the hydraulic end is provided with three pump heads 6 in parallel, and the three pump heads 6 are driven by the power end 16 respectively, the suction pipeline 7 is connected in parallel with the suction ports of the three pump heads 6 respectively, and the discharge pipeline 8 is connected in parallel with the discharge ports of the three pump heads 6 respectively. When the plugging liquid delivery pump is working, the plugging liquid in the plugging liquid tank 20 is sucked in through the suction pipeline 7 and the suction valve 10, and discharged through the discharge valve 11 and the discharge pipeline 8, thereby completing the delivery of the plugging liquid. When the plugging pump vibrates and the pressure gauge 21 swings too much, it means that there are too many impurities in the plugging liquid precipitated and accumulated at the closed end of the suction pipe 7, which affects or even blocks the suction port, and the plugging liquid cannot be sucked in smoothly. Open the reflux valve 13 in time, and the plugging liquid enters the plugging liquid tank 20 through the reflux pipe 12. At the same time, the plugging liquid impurities precipitated and accumulated at the closed end of the suction pipe 7 are discharged with the plugging liquid. After the pressure gauge 21 shows that the pressure is stable, close the reflux valve 13, and the plugging liquid resumes being sucked in from the suction valve 10, and is discharged from the discharge valve 11 and the discharge pipe 8 to the plugging point. This reciprocating cycle continuously removes the impurities of the plugging liquid precipitated at the closed end of the suction pipe 7, thereby ensuring the continuous and normal operation of the plugging liquid delivery pump, reducing the frequency of maintenance, reducing labor intensity, and improving the working efficiency of the plugging pump. After the plugging liquid is delivered, the plugging liquid delivery pump sucks in the cleaning liquid to clean the pump and the pipeline. After the cleaning is completed, the waste cleaning liquid remaining in the return pipeline 12 and the suction pipeline 7 is discharged through the flushing valve 14.

[0035] In the above embodiment, the power end 16 is driven by the motor 22 and the reducer 23, and the motor 22 is arranged above the transmission end 16, the lubricating liquid tank for providing lubricating liquid to the lubricating system 15 is arranged below the power end 16, and the cooling liquid tank for providing cooling liquid to the cooling system 19 is arranged below the hydraulic end 17. This can reduce the floor space occupied by the plugging liquid delivery pump when it is skid-mounted.

[0036] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A plugging liquid delivery pump, comprising a power end (16), a hydraulic end (17), a lubrication system (18) and a cooling system (19), wherein the hydraulic end (17) comprises a pump head (6), a liquid suction pipeline (7) and a liquid discharge pipeline (8), wherein the pump head (6) comprises a body (9), a liquid suction valve (10) and a liquid discharge valve (11), wherein the liquid suction valve (10) and the liquid discharge valve (11) are respectively installed in a liquid suction port and a liquid discharge port in the body (9), wherein the liquid suction pipeline (7) is connected to the liquid suction port, and the liquid discharge pipeline (8) is connected to the liquid discharge port, wherein: The liquid suction valve (10) and the liquid discharge valve (11) both comprise an annular valve seat (1), an annular sealing seat (2), and an annular guide seat (3) which are coaxially arranged from bottom to top. The lower end of the annular sealing seat (2) is embedded in the upper part of the annular valve seat (1). The upper end of the annular valve seat (1) is threadedly connected with the annular guide seat (3), and the upper end of the annular sealing seat (2) is embedded in the annular guide seat (3). The annular sealing seat (2) is pressed onto the upper part of the annular valve seat (1) through the annular guide seat (3). A valve ball (4) which can move up and down and rotate freely is installed in the annular guide seat (3), and when the valve ball (4) falls and is tightly attached to the upper end of the annular sealing seat (2), the pump valve is closed. The closed end of the liquid suction pipeline (7) is connected to the leak-proof liquid tank (20) through a reflux pipeline (12), and a reflux valve (13) is provided on the reflux pipeline (12).

2. The plugging liquid delivery pump according to claim 1, characterized in that: The closed end of the liquid suction pipeline (7) is also provided with a flushing valve (14).

3. The plugging liquid delivery pump according to claim 1, characterized in that: The upper end surface of the annular sealing seat (2) is a conical surface (2-2), and the bottom of the conical surface (2-2) protrudes inward to form a conical sealing surface (2-1); the conical angle α of the conical sealing surface is 64°-66°, and the height H is 2-3 mm; when the valve ball (4) falls and is in close contact with the conical sealing surface (2-1), the pump valve is closed.

4. The plugging liquid delivery pump according to claim 1, 2 or 3, characterized in that: The annular guide seat (3) has evenly distributed notches (3-1) on its upper portion, so that a plurality of symmetrically arranged guide columns (3-2) are formed on its upper portion, the cross section of the guide column (3-2) being an isosceles triangle structure with its sharp corner facing inward, and the sharp corner is chamfered to form a vertical guide surface (3-3), and the vertical guide surface (3-3) protrudes from the inner diameter of the bottom of the annular guide seat (3); the valve ball (4) is guided by the vertical guide surface (3-3) when it moves up and down.

5. The plugging liquid delivery pump according to claim 4, characterized in that: The upper end of the annular sealing seat (2) is embedded in the inner diameter of the bottom of the annular guide seat (3), the outer diameter of the annular sealing seat (2) is provided with a shoulder (2-3), and the lower end of the annular guide seat (3) abuts against the shoulder (2-3).

6. The plugging liquid delivery pump according to claim 5, characterized in that: The annular sealing seat (2) is a non-metallic structure.

7. The plugging liquid delivery pump according to claim 6, characterized in that: A sealing ring (5) is provided between the outer diameter of the annular sealing seat (2) and the annular valve seat (1).

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