Hydraulic pitching machine for oil pipeline

Abstract

The utility model discloses a hydraulic ball pitching machine for an oil pipeline, which comprises a connecting transverse pipe, a ball pitching pipe is upwards communicated with the side part of one end of the connecting transverse pipe, a ball containing barrel is arranged above the top end of the ball pitching pipe, and a ball pitching valve capable of turning over up and down is arranged in the ball pitching pipe. The position, located above the ball throwing valve, of one side of the ball throwing pipe is communicated with a three-way reversing valve located in the other end of the connecting transverse pipe through a hydraulic pipe, isolating valves are arranged on the hydraulic pipe and the ball throwing pipe, and the position, located between the isolating valves and the ball throwing pipe, of the hydraulic pipe is communicated with an oil discharging unit. Rubber balls can be loaded in batches at a time, timing or network remote ball throwing can be achieved in the oil conveying process, the paraffin removal and pipeline dredging effect can be effectively achieved, normal oil conveying of a crude oil conveying pipeline is guaranteed, valve closing and well stopping are not needed in the whole ball loading and ball throwing process, and workers only need to supplement the rubber balls in the ball loading barrel in batches at regular intervals. Therefore, the labor intensity of workers is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of crude oil transportation equipment, in particular to a hydraulic ball throwing machine for an oil pipeline. Background Art

[0002] The way to gather and transport oil after production in each oil field is to use pipelines to transport it to the oil gathering station or centralized processing station. When the temperature of crude oil is too low for a long time, a large amount of paraffin in the crude oil will precipitate and adhere to the inner wall of the oil pipeline. Over time, the cross-section of the pipeline will be reduced, and it may even seriously block the oil pipeline, increase the resistance of the oil pipeline, increase the pipe pressure, increase the pump pressure, and increase the power consumption, thus affecting the transportation of crude oil. Therefore, the staff needs to go to the well site every day to throw balls into the oil pipeline to remove wax. In the wax removal ball throwing operation, a rubber ball slightly smaller than the inner diameter of the pipeline is generally thrown into the pipeline. Under the action of oil pressure, the rubber ball moves to the oil gathering station to squeeze and remove the condensed paraffin on the wall of the oil pipeline. Finally, the rubber ball is collected by the ball collecting device at the oil gathering station or the end of the pipeline to achieve the purpose of unblocking the pipeline.

[0003] However, a large oil field has thousands of well sites, each with an oil pipeline. Manual ball throwing every day requires a large number of personnel and vehicles. Each time the ball is thrown, the two valves before and after the equipment must be closed, and then the wax-clearing ball is thrown into the pipeline. Finally, the two valves before and after the oil production device are opened to send the wax-clearing ball into the oil pipeline. In winter, when the bypass pipe freezes, the well must be stopped for ball throwing, and the operation process is cumbersome. Therefore, a special ball throwing device is urgently needed to reduce oil production costs and reduce the labor intensity of staff. Utility Model Content

[0004] The utility model aims to provide a hydraulic ball throwing machine for oil pipelines, which solves the problem of high labor cost of the existing ball throwing method.

[0005] The technical solution adopted by the utility model is: a hydraulic ball throwing machine for an oil pipeline, comprising a connecting transverse pipe, a side portion of one end of the connecting transverse pipe being upwardly connected to a ball throwing pipe with a ball loading cylinder provided on the top, a ball throwing valve which is turned upside down is provided in the ball throwing pipe, a position on one side of the ball throwing pipe located above the ball throwing valve is connected to a three-way reversing valve located in the other end of the connecting transverse pipe through a hydraulic pipe, isolation valves are provided on both the hydraulic pipe and the ball throwing pipe, and an oil discharge unit is connected to a position on the hydraulic pipe between the isolation valve and the ball throwing pipe.

[0006] The utility model is also characterized in that:

[0007] The ball loading cylinder includes a cylinder body, a rotating shaft is coaxially arranged in the cylinder body, the top end of the rotating shaft extends upward and is coaxially fixedly connected to a ball loading motor, a plurality of longitudinally arranged ball loading tubes are fixedly arranged along the circumferential direction on the side wall of the rotating shaft, and a ball throwing port connected to the top end of the ball throwing tube is provided at the bottom end of the cylinder body, which is located on the axial connecting line of the plurality of ball loading tubes.

[0008] The inner diameters of the ball loading tube, the ball throwing port and the ball throwing tube are approximately the same.

[0009] A cylinder cover is fixedly sealed at the top of the cylinder body, and a ball loading opening is provided on the cylinder cover which is located on the axial connection line of the plurality of ball loading tubes.

[0010] The ball-dropping valve includes a transversely arranged cylindrical valve body, in which a cylindrical valve core is arranged. One end of the valve core is coaxially connected to a ball-dropping motor fixed to the valve body. A ball-dropping groove corresponding to the outer diameter of the rubber ball is provided on the side of the valve core corresponding to the ball-dropping pipe, and a guide hole is provided in the ball-dropping groove to pass through to the other side of the valve core.

[0011] A thermal conductivity flow (speed) detector electrically connected to the three-way reversing valve is arranged in the hydraulic pipe, and the ball throwing motor is electrically connected to the three-way reversing valve and the ball loading motor.

[0012] The oil discharge unit includes an oil discharge pump, the input end of the oil discharge pump is connected to the hydraulic pipe through a high-pressure hose, the output end of the oil discharge pump is connected to a three-way valve, one output end of the three-way valve is connected to the connecting cross pipe through a high-pressure hose via the high-pressure valve and a one-way valve, and the other output end of the three-way valve is connected to the atmosphere through a high-pressure hose via the high-pressure valve.

[0013] A filter screen is arranged at a position in the hydraulic pipe that is connected with the high-pressure hose at the input end of the oil discharge pump.

[0014] A pressure transmitter is provided in the hydraulic pipe between the isolation valve and the ball injection pipe.

[0015] The oil pipeline hydraulic ball throwing machine is arranged in a shell body and the two ends of the connecting transverse pipe extend outwards. An electric heater is arranged in the shell body.

[0016] The beneficial effects of the utility model are as follows: the hydraulic ball throwing machine for the oil pipeline of the utility model can load rubber balls in batches at one time through the ball loading barrel; during the oil transportation process, after the ball throwing valve is timed or the network remotely throws the ball, the liquid flow is reversed through the three-way reversing valve, and the rubber balls are pushed into the connecting cross pipe by the power of the liquid; after the ball throwing, the wax clearing and pipeline unblocking effect can be effectively achieved, thereby ensuring the normal oil transportation of the crude oil transportation pipeline; when the ball is loaded again, the crude oil in the ball loading barrel can be discharged through the oil discharge unit; the overall ball loading and throwing process does not require closing the valve and stopping the well, and the staff only needs to regularly replenish the rubber balls in the ball loading barrel in batches, thereby greatly reducing the labor intensity of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the oil pipeline hydraulic ball throwing machine of the utility model;

[0018] Figure 2 It is a schematic diagram of the state of the hydraulic ball throwing machine for oil pipeline of the utility model when performing normal oil delivery work;

[0019] Figure 3It is a schematic diagram of the state of the oil pipeline hydraulic ball throwing machine of the utility model when throwing balls;

[0020] Figure 4 The utility model is a schematic diagram of the state of the hydraulic ball throwing machine for oil pipeline when discharging oil.

[0021] In the figure, 1. connecting horizontal pipe, 2. ball throwing pipe, 3. hydraulic pipe, 4. three-way reversing valve, 5. isolating valve, 6. cylinder, 7. rotating shaft, 8. ball loading motor, 9. ball loading pipe, 10. ball throwing port, 11. cylinder cover, 12. ball loading port, 13. valve body, 14. valve core, 15. ball throwing motor, 16. rubber ball, 17. ball throwing groove, 18. guide hole, 19. flow detector, 20. oil discharge pump, 21. high-pressure hose, 22. three-way valve, 23. high-pressure valve, 24. one-way valve, 25. filter screen, 26. pressure transmitter. DETAILED DESCRIPTION

[0022] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0023] Example 1

[0024] The utility model provides a hydraulic ball throwing machine for oil pipelines, such as Figure 1 As shown, it includes a connecting transverse pipe 1, through which the ball throwing machine is connected to the oil pipeline. The side of one end of the connecting transverse pipe 1 is upwardly connected to a ball throwing pipe 2 with a ball loading barrel on the top, and a ball throwing valve that flips up and down is arranged in the ball throwing pipe 2, which is used to throw the rubber ball 16 falling from the ball loading barrel downward into the connecting transverse pipe 1. A position above the ball throwing valve on one side of the ball throwing pipe 2 is connected to a three-way reversing valve 4 driven by an electric actuator located in the other end of the connecting transverse pipe 1 through a hydraulic pipe 3. The three-way reversing valve 4 can horizontally guide the crude oil at the inlet end of the connecting transverse pipe 1 to the outlet end or upwardly to the hydraulic pipe 3. Isolation valves 5 are arranged on both the hydraulic pipe 3 and the ball throwing pipe 2. The position between the isolation valve 5 and the ball throwing pipe 2 on the hydraulic pipe 3 is connected to an oil discharge unit. When it is necessary to discharge the crude oil in the ball loading barrel, first close the two isolation valves 5, and then operate the oil discharge unit to discharge the crude oil to the connecting transverse pipe 1 or the outside.

[0025] The ball loading cylinder includes a cylinder body 6, a rotating shaft 7 is coaxially arranged in the cylinder body 6, the top of the rotating shaft 7 extends upward and is coaxially fixedly connected to a ball loading reduction motor, and a plurality of longitudinally arranged ball loading tubes 9 are fixedly arranged on the side wall of the rotating shaft 7 along the circumferential direction, thereby driving the ball loading tubes 9 to rotate, and a ball throwing port 10 connected to the top of the ball throwing tube 2 is opened at the bottom of the cylinder body 6 on the axial connection line of the plurality of ball loading tubes 9, and the ball loading tube 9 and the ball throwing port 10 are of the same size as the inner diameter of the ball throwing tube 2. The ball loading motor 8 drives the rotating shaft 7 to rotate, and when one of the plurality of ball loading tubes 9 rotates to align with the ball throwing port 10, the rubber ball 16 in the ball loading tube 9 falls into the ball throwing tube 2 through the ball throwing port 10. A cylinder cover 11 is fixedly sealed at the top of the cylinder body 6, and the cylinder cover 11 is located on the axial connection line of the plurality of ball loading tubes 9 and is provided with a ball loading port 12, and the staff regularly replenishes the rubber balls 16 in batches into the ball loading tube 9 through the ball loading port 12. The rotational arrangement of the ball loading tube 9 in the ball loading barrel can significantly reduce the height of the ball loading tube 9 under the same capacity, thereby improving the applicability of the ball pitching machine.

[0026] The ball-dropping valve comprises a transversely arranged cylindrical valve body 13, in which a cylindrical valve core 14 is arranged, one end of the valve core 14 is coaxially connected with an actuator fixed outside the valve body 13, namely, a ball-dropping motor 15, a ball-dropping groove 17 having an outer diameter equivalent to that of a rubber ball 16 is provided on the side of the valve core 14 corresponding to the ball-dropping tube 2, and a guide hole 18 penetrating to the other side of the valve core 14 is provided in the ball-dropping groove 17. During operation, after the rubber ball 16 falls into the ball-dropping groove 17, the ball-dropping motor 15 drives the valve core 14 to rotate 180° in the valve body 13, namely, the opening of the ball-dropping groove 17 faces downward, and at the same time, the crude oil introduced into the hydraulic pipe 3 through the guide hole 18 assists in pushing the rubber ball 16 down, so as to prevent the rubber ball 16 from being stuck in the ball-dropping tube 2 due to the influence of paraffin. A thermal conductivity flow rate (speed) detector, i.e., a flow detector 19, which is electrically connected to the three-way reversing valve 4, is provided in the hydraulic pipe 3. The ball-casting motor 15 is electrically connected to the three-way reversing valve 4 and the ball-loading motor 8. When casting, the ball-casting motor 15 is started by the PLC timing to turn the valve core 14 over, and the three-way reversing valve 4 is linked and synchronously guides the crude oil in the connecting transverse pipe 1 into the hydraulic pipe 3 and then boosts it through the diversion hole 18, thereby casting the rubber ball 16. At the same time, when the flow detector 19 detects that there is flow, after a certain delay, the three-way reversing valve 4 automatically returns to its position to allow the crude oil to flow through the connecting transverse pipe 1 again. The ball-casting motor 15 also starts to return to its position after the three-way reversing valve 4 returns to its position. After the ball-casting valve returns to its position, the ball-loading motor 8 starts to rotate, and the rubber ball 16 in the ball-loading tube 9 in the cylinder 6 falls into the ball-casting groove 17, preparing for the next casting.

[0027] The oil discharge unit includes an oil discharge pump 20, the input end of the oil discharge pump 20 is connected to the hydraulic pipe 3 through a high-pressure hose 21, a filter 25 is arranged in the hydraulic pipe 3 at the connecting position, and the output end of the oil discharge pump 20 is connected to a three-way valve 22, one output end of the three-way valve 22 is connected to the connecting cross pipe 1 through a high-pressure hose 21, a high-pressure valve 23 and a one-way valve 24, and the other output end of the three-way valve 22 is connected to the atmosphere through a high-pressure hose 21, a high-pressure valve 23. A pressure transmitter 26 is arranged in the hydraulic pipe 3 between the isolation valve 5 and the ball-dropping pipe 2 to observe the oil pressure in the ball cylinder and the hydraulic pipe 3 when the oil is discharged. When draining oil, close the two isolation valves 5, start the oil drain pump 20 to extract the crude oil in the ball cylinder through the filter screen 25 and the high-pressure hose 21 in the hydraulic pipe 3, and then discharge it to the connecting cross pipe 1 through the three-way valve 22, the high-pressure hose 21 and the high-pressure valve 23. Since the connecting cross pipe 1 is connected to the oil pipeline with a high pressure, the one-way valve 24 can prevent the crude oil in the connecting cross pipe 1 from flowing back. However, when the crude oil pressure in the connecting cross pipe 1 is too high, the extracted crude oil will be discharged to the outside through the three-way valve 22, the high-pressure hose 21 and the high-pressure valve 23.

[0028] The hydraulic ball throwing machine for oil pipeline is arranged in the shell and the two ends of the connecting cross pipe 1 extend outward. Electric heaters are arranged in the shell, for example, outside the ball loading cylinder, bottom of the ball throwing valve, and bottom of the three-way reversing valve 4. If the temperature is low and the crude oil is thick before loading, the electric heater can be turned on for heating. The wires of all electrical equipment are extended into the distribution box arranged outside the shell and connected to the power supply.

[0029] Through the above-mentioned method, the hydraulic ball throwing machine of the oil pipeline of the utility model can load rubber balls in batches at one time through the ball loading barrel. During the oil transportation process, after the ball throwing valve is timed or the network remotely throws the ball, the liquid flow is reversed through the three-way reversing valve 4, and the rubber balls are pushed into the connecting cross pipe 1 by the power of the liquid. After the flow detector 19 detects that there is liquid flowing through the hydraulic pipe 3, it delays to ensure that the rubber balls 16 are pushed into the connecting cross pipe 1, and then the three-way reversing valve 4 returns to the normal position. After throwing the ball, the effect of clearing wax and unblocking the pipeline can be effectively achieved, ensuring the normal oil transportation of the crude oil transportation pipeline. When the ball is loaded again, the crude oil in the ball loading barrel can be discharged through the oil discharge unit. The overall ball loading and throwing process does not require closing the valve and stopping the well. The staff only needs to regularly replenish the rubber balls 16 in the ball loading barrel in batches, thereby greatly reducing the labor intensity of the staff.

[0030] Example 2

[0031] The utility model provides a hydraulic ball throwing machine for oil pipelines. When performing normal oil transportation work, Figure 2 As shown, the horizontal direction of the three-way reversing valve 4 is open, and the two isolation valves 5 remain open. After the time controller in the PLC starts the pitching program at a fixed time, as shown in FIG. Figure 3As shown, the ball-casting motor 15 drives the valve core 14 and the ball-casting slot 17 to turn downward, the three-way reversing valve 4 is closed in the horizontal direction, and the direction of communication with the hydraulic pipe 3 is conducted. The crude oil enters the hydraulic pipe 3 through the three-way reversing valve 4, and then enters the ball-casting pipe 2 through the diversion hole 18 to help the ball-casting valve to cast the ball. At the same time, when the flow detector 19 detects that there is flow, after a certain time delay through the PLC, the three-way reversing valve 4 automatically returns to its position to allow the crude oil to flow through the connecting horizontal pipe 1 again. The ball-casting motor 15 also starts to return after the three-way reversing valve 4 returns to its position. After the ball-casting valve returns to its position, the ball-loading motor 8 starts to rotate, and the rubber ball 16 in the ball-loading tube 9 in the cylinder 6 falls into the ball-casting slot 17, preparing for the next ball-casting. The above process can also be controlled by the staff manually operating the controller, that is, the network remote ball-casting is realized through the PLC controller. The principle is the same as the timed automatic ball-casting. The ball-casting and ball-loading actions in the operation process are also completed by mechanical automation, which can also greatly reduce the labor intensity of the staff.

[0032] Example 3

[0033] The utility model provides a hydraulic ball throwing machine for oil pipelines. When the ball loading is not the first time, since crude oil flows into the cylinder 6, it is necessary to drain the oil first in order to prevent the crude oil from overflowing during the ball loading process. Figure 4 As shown, first close the two isolation valves 5, start the oil discharge pump 20, and the crude oil in the ball loading cylinder and hydraulic pipe 3 is sucked into the connecting cross pipe 1 through the oil discharge pump 20. When the pressure transmitter 26 shows a negative value, open the cylinder cover 11 to check the crude oil level until the crude oil level in the cylinder body 6 does not move. If it is still not at the bottom, open the high-pressure valve 23 connected to the atmosphere until the bottom is reached. Then start loading the balls. After loading is completed, cover the cylinder cover 11 and open the isolation valve 5.

Claims

1. Oil pipeline hydraulic ball throwing machine, characterized in that: The invention comprises a connecting transverse pipe (1), wherein the side of one end of the connecting transverse pipe (1) is upwardly connected to a ball throwing pipe (2) having a ball loading cylinder arranged on the top, wherein a ball throwing valve which is turned upside down is arranged in the ball throwing pipe (2), and a position on one side of the ball throwing pipe (2) located above the ball throwing valve is connected to a three-way reversing valve (4) located in the other end of the connecting transverse pipe (1) through a hydraulic pipe (3), and an isolation valve (5) is arranged on both the hydraulic pipe (3) and the ball throwing pipe (2), and an oil discharge unit is connected to a position on the hydraulic pipe (3) between the isolation valve (5) and the ball throwing pipe (2).

2. The oil pipeline hydraulic ball throwing machine according to claim 1, characterized in that: The ball loading cylinder comprises a cylinder body (6), a rotating shaft (7) is coaxially arranged inside the cylinder body (6), the top end of the rotating shaft (7) extends upward and is coaxially fixedly connected to a ball loading motor (8), a plurality of longitudinally arranged ball loading tubes (9) are fixedly arranged along the circumferential direction on the side wall of the rotating shaft (7), and a ball throwing port (10) communicating with the top end of the ball throwing tube (2) is provided at the bottom end of the cylinder body (6) on the axial connecting line of the plurality of ball loading tubes (9).

3. The oil pipeline hydraulic ball throwing machine as claimed in claim 2, characterized in that: The inner diameters of the ball loading tube (9) and the ball throwing opening (10) are comparable to the inner diameters of the ball throwing tube (2).

4. The oil pipeline hydraulic ball throwing machine as claimed in claim 2, characterized in that: The top end of the cylinder (6) is fixedly sealed with a cylinder cover (11), and the cylinder cover (11) is located on the axial connection line of the plurality of ball loading tubes (9) and is provided with a ball loading port (12).

5. The oil pipeline hydraulic ball throwing machine as claimed in claim 2, characterized in that: The ball-dropping valve comprises a transversely arranged cylindrical valve body (13), a cylindrical valve core (14) being arranged in the valve body (13), one end of the valve core (14) being coaxially connected to a ball-dropping motor (15) fixed outside the valve body (13), a ball-dropping groove (17) having a size equivalent to the outer diameter of a rubber ball (16) being provided on the side of the valve core (14) corresponding to the ball-dropping tube (2), and a flow guide hole (18) penetrating to the other side of the valve core (14) being provided in the ball-dropping groove (17).

6. The oil pipeline hydraulic ball throwing machine as claimed in claim 5, characterized in that: A flow detector (19) electrically connected to the three-way reversing valve (4) is arranged in the hydraulic pipe (3), and the ball pitching motor (15) is electrically connected to the three-way reversing valve (4) and the ball loading motor (8).

7. The oil pipeline hydraulic ball throwing machine as claimed in claim 1, characterized in that: The oil discharge unit comprises an oil discharge pump (20), the input end of the oil discharge pump (20) is connected to the hydraulic pipe (3) through a high-pressure hose (21), the output end of the oil discharge pump (20) is connected to a three-way valve (22), one output end of the three-way valve (22) is connected to the connecting cross pipe (1) through a high-pressure hose (21) via a high-pressure valve (23) and a one-way valve (24), and the other output end of the three-way valve (22) is connected to the atmosphere through a high-pressure hose (21) via the high-pressure valve (23).

8. The oil pipeline hydraulic ball throwing machine according to claim 7, characterized in that: A filter screen (25) is provided in the hydraulic pipe (3) at a position communicating with the high-pressure hose (21) at the input end of the oil discharge pump (20).

9. The oil pipeline hydraulic ball throwing machine according to claim 7, characterized in that: A pressure transmitter (26) is provided in the hydraulic pipe (3) at a position between the isolation valve (5) and the ball injection pipe (2).

10. The oil pipeline hydraulic ball throwing machine according to claim 1, characterized in that: The oil pipeline hydraulic ball throwing machine is arranged in a shell and connected to a transverse pipe (1) with both ends extending outwards, and an electric heater is arranged in the shell.

Images