A hydraulic valve group for a large horsepower cementing truck and a hydraulic system comprising the same

Abstract

The utility model relates to petroleum drilling equipment technical field especially discloses a hydraulic valve group for big horsepower well cementing truck, including valve block, be equipped with pilot relief valve, check valve, first logic valve, second logic valve, first solenoid valve, second solenoid valve, first anti-suction check valve, second anti-suction check valve and soft start valve on valve block, pilot relief valve is connected on the working oil pipe of valve block, first solenoid valve and second solenoid valve are parallelly connected, the oil return pipe of first solenoid valve and second solenoid valve is connected and is connected on the main oil return pipe of valve block, first logic valve and second logic valve are parallelly connected, and the output end of first logic valve is connected with soft start valve, and the output end oil pipe of soft start valve is connected with second anti-suction check valve, and the output end oil pipe of second logic valve is connected with first anti-suction check valve.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling equipment technology, and in particular to a hydraulic valve group for a high-horsepower cementing truck and the hydraulic system thereof. Background Technology

[0002] A cementing truck is a piece of equipment used in oil drilling to reinforce the wellbore with cement. Its main function is to mix cement slurry and pump it into the wellbore under high pressure. Conventional cementing trucks are low-horsepower, typically with an output of 400-600 horsepower. With the increase in ultra-deep wells and the development of mining technology, the output power requirements for cementing trucks are getting higher and higher. Therefore, high-horsepower cementing trucks have emerged. High-horsepower cementing trucks are single-machine, single-pump trucks, meaning they have only one engine and one fracturing pump. The output of water is generally around 2000-2500 horsepower. Such a high-horsepower engine requires hydraulic starting, and the power source for hydraulic starting comes from the chassis vehicle's power take-off. However, high-horsepower cementing trucks only have two power take-off ports: one on the gearbox and one on the chassis vehicle's full power take-off. But there are multiple actions to be performed, so how to make reasonable use of these two power take-off ports is crucial. Since the engine start-up and centrifugal pump drive do not operate simultaneously, the same hydraulic pump can be used for both, switching between them at different times to save one hydraulic pump. The conventional design uses a manual ball valve for switching, which has many problems. First, it requires personnel to operate the high-pressure ball valve at close range, which poses a safety hazard. Second, the flow rate is large, the reversing valve size is also large, and a large force is required when reversing. Third, the reversing impact is large.

[0003] Therefore, it is necessary to propose an improvement to overcome the shortcomings of the existing technology. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art by providing a hydraulic valve group for a high-horsepower cementing truck and the hydraulic system thereof, which solves the above problems by controlling the on / off state with a high-flow logic valve, remotely controlling the solenoid valve, and remotely adjusting the pressure.

[0005] The technical solution of this utility model is:

[0006] A hydraulic valve assembly for a high-horsepower cementing truck includes a valve block. The valve block is equipped with a pilot relief valve, a check valve, a first logic valve, a second logic valve, a first solenoid valve, a second solenoid valve, a first anti-vacuum check valve, a second anti-vacuum check valve, and a soft-start valve. The pilot relief valve is connected to the working oil pipe of the valve block. The first solenoid valve and the second solenoid valve are connected in parallel. The return oil pipes of the first solenoid valve and the second solenoid valve are connected to the main return oil pipe of the valve block. The first logic valve and the second logic valve are connected in parallel. The output end of the first logic valve is connected to the soft-start valve. The output oil pipe of the soft-start valve is connected to the second anti-vacuum check valve. The output oil pipe of the second logic valve is connected to the first anti-vacuum check valve. The output ends of both the first anti-vacuum check valve and the second anti-vacuum check valve are connected to the main return oil pipe.

[0007] As a preferred technical solution, the valve block is provided with a pressure testing connector, and a pressure gauge is connected to the pressure testing connector.

[0008] As a preferred technical solution, the valve block is connected to a speed control valve, the oil inlet end of the speed control valve is connected to the oil overflow end of the pilot relief valve, and the oil outlet end of the speed control valve is connected to an oil discharge pipeline.

[0009] As a preferred technical solution, the oil unloading pipeline is equipped with an oil unloading filter.

[0010] As a preferred technical solution, the valve block is provided with a lifting ring.

[0011] A hydraulic system for a high-horsepower cementing vehicle includes the aforementioned high-horsepower cementing hydraulic valve assembly.

[0012] As a preferred technical solution, it includes an engine starter motor and a centrifugal pump drive motor. The oil inlet of the engine starter motor is connected to the oil outlet of the soft start valve, and the oil inlet of the centrifugal pump drive motor is connected to the oil outlet of the second logic valve. The oil outlets of both the engine starter motor and the centrifugal pump drive motor are connected to the main return oil pipe.

[0013] As a preferred technical solution, the main return oil pipe is equipped with a hydraulic oil cooler and a return oil filter. The hydraulic oil cooler is connected to the oil outlet of the engine starter motor and the centrifugal pump drive motor, and the return oil filter is connected to the oil outlet of the hydraulic oil cooler.

[0014] As a preferred technical solution, the oil inlet end of the working oil pipe is sequentially provided with an oil suction filter, an oil suction ball valve, a hydraulic pump and a high-pressure filter, and the oil outlet end of the high-pressure filter is connected to the oil inlet end of the valve block.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention relates to a high-horsepower cementing truck hydraulic valve group and its hydraulic system. By setting up a first solenoid valve and a second solenoid valve, the two solenoid valves work together to control the flow of hydraulic oil. The electrical switching of the solenoid valves controls the on / off state of the logic valves. The first and second solenoid valves are interlocked and powered in a time-sharing manner. The hydraulic oil circuit is switched via electrical signals, enabling unmanned operation and eliminating safety hazards. Furthermore, by setting up the first and second logic valves, a pressure-sensitive flow divider is formed, matching different load requirements and achieving full-pressure output during startup and pressure-regulated operation during the centrifugal pump drive phase. Attached Figure Description

[0017] Figure 1 This is a front view of the hydraulic valve assembly for the high-horsepower cementing truck of this utility model;

[0018] Figure 2 This is a side view of the hydraulic valve assembly for the high-horsepower cementing vehicle of this utility model;

[0019] Figure 3 This is a top view of the hydraulic valve assembly for the high-horsepower cementing truck of this utility model;

[0020] Figure 4 This is a connection diagram of the hydraulic system for the high-horsepower cementing truck of this utility model.

[0021] The components are as follows: 1. Valve block; 2. Pilot relief valve; 31. First logic valve; 32. Second logic valve; 41. First solenoid valve; 42. Second solenoid valve; 5. Check valve; 61. First anti-vacuum check valve; 62. Second anti-vacuum check valve; 7. Pressure test connector; 8. Lifting ring; 9. Soft start valve; 10. Suction filter; 11. Suction ball valve; 12. Hydraulic pump; 13. High pressure filter; 14. Engine starter motor; 15. Centrifugal pump drive motor; 16. Hydraulic oil cooler; 17. Return oil filter; 18. Drain filter; 19. Speed ​​control valve; 20. Pressure gauge; 21. Hydraulic oil tank. Detailed Implementation

[0022] To make the technical means, technical features, utility model purpose and technical effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0023] The hydraulic valve group for the high-horsepower cementing truck in this embodiment includes a valve block 1 equipped with a pilot relief valve 2, a first logic valve 31, a second logic valve 32, a first solenoid valve 41, a second solenoid valve 42, a first anti-vacuum check valve 61, a second anti-vacuum check valve 62, and a soft start valve 9. The valve block 1 is the main body on which each valve body is installed. It has an internal oil passage, valve holes and oil ports on its surface, and is galvanized. A lifting ring 8 is installed on the valve block 1 to facilitate the lifting of the valve block 1. A pressure test connector 7 is installed on the valve block 1, and a pressure gauge 20 is connected to the pressure test connector 7 for measuring the pressure and checking whether the system pressure is normal.

[0024] Among them, the pilot relief valve 2 is connected to the working oil pipe of the valve block 1, the oil inlet end of the speed control valve 19 is connected to the oil outlet end of the pilot relief valve 2, the oil outlet end of the speed control valve 19 is connected to the drain filter 18, and the oil outlet end of the drain filter 18 is connected to the drain port of the hydraulic oil tank 21 through the drain pipeline. It is mainly used for the system pressure setting and is remotely adjusted by the speed control valve 19. The first solenoid valve 41 and the second solenoid valve 42 are connected in parallel. The oil inlet ends of the first solenoid valve 41 and the second solenoid valve 42 are connected to the working oil pipe of the valve block 1. The oil return pipes of the first solenoid valve 41 and the second solenoid valve 42 are connected to the main oil return pipe of the valve block 1. The first logic valve 31 and the second logic valve 32 are connected in parallel. The output end of the first logic valve 31 is connected to the soft start valve 9. The oil pipe at the output end of the soft start valve 9 is connected to the second anti-vacuum check valve 62. The oil pipe at the output end of the second logic valve 32 is connected to the first anti-vacuum check valve 61. The output ends of the first anti-vacuum check valve 61 and the second anti-vacuum check valve 62 are both connected to the main oil return pipe.

[0025] The hydraulic system also includes an engine starter motor 14 and a centrifugal pump drive motor 15. The oil inlet of the engine starter motor 14 is connected to the oil outlet of the soft start valve 9, and the oil inlet of the centrifugal pump drive motor 15 is connected to the oil outlet of the second logic valve 32. The oil outlets of the engine starter motor 14 and the centrifugal pump drive motor 15 are connected and connected to a hydraulic oil cooler 16. The oil outlet of the hydraulic oil cooler 16 is connected to a return oil filter 17, and the oil outlet of the return oil filter 17 is connected to the hydraulic oil tank 21 via a return oil pipeline. A suction filter 10, a suction ball valve 11, a hydraulic pump 12, and a high-pressure filter 13 are sequentially installed on the working oil line at the oil inlet of the valve block 1. The oil inlet of the suction filter 10 is connected to the oil outlet of the hydraulic oil tank 21, and the oil outlet of the high-pressure filter 13 is connected to the oil inlet of the valve block 1.

[0026] When the function is to start the engine, the speed control valve 19 remotely sets the pressure of the pilot relief valve 2 to the maximum. When the engine start switch is pressed, an electrical signal is sent to the first solenoid valve 41, and the first solenoid valve 41 reverses. The oil passes through the check valve 5 and then through the first logic valve 31 to reach the soft start valve 9. After the soft start valve 9 filters and reduces the impact of the peak pressure, it reaches the engine starter motor 14 to start the engine.

[0027] After the engine starts, the speed control valve 19 is adjusted to the minimum pressure. At this time, the function is switched to centrifugal pump drive function. The switch is switched to centrifugal pump drive, the first solenoid valve 41 is de-energized, and the second solenoid valve 42 is energized. After the second solenoid valve 42 reverses, the oil passes through the check valve 5 and then through the second logic valve 32 to reach the centrifugal pump drive motor 15. Then the pilot relief valve 2 can be remotely adjusted through the speed control valve 19, thereby adjusting the speed of the centrifugal pump.

[0028] The first anti-vacuum check valve 61 and the second anti-vacuum check valve 62 in the valve group are mainly used to prevent cavitation caused by the inertial rotation of the engine starter motor 14 and the centrifugal pump drive motor 15 during the shutdown process, and are used to protect the motors.

[0029] Hydraulic pump 12, through its volume change, draws oil from the tank, which is then coarsely filtered by suction filter 10, pumped into the system by suction ball valve 11, finely filtered by high-pressure filter 13, and enters the valve assembly. After being controlled by the valve assembly, the oil enters the motor for operation. The oil after operation is cooled by hydraulic oil cooler 16, filtered by return oil filter 17, and then returns to hydraulic oil tank 21. Hydraulic oil leaking from speed control valve 19 is filtered by drain filter 18 and then returns to hydraulic oil tank 21.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. All equivalent changes and modifications made in accordance with the scope of the claims of this utility model should fall within the technical scope of this utility model.

Claims

1. A hydraulic valve group for a high horsepower cementing truck, characterized by, The valve block (1) is provided with a pilot overflow valve (2), a one-way valve (5), a first logic valve (31), a second logic valve (32), a first electromagnetic valve (41), a second electromagnetic valve (42), a first anti-suction one-way valve (61), a second anti-suction one-way valve (62) and a soft start valve (9), the pilot overflow valve (2) is connected to the working oil pipe of the valve block (1), the first electromagnetic valve (41) and the second electromagnetic valve (42) are connected in parallel, the oil return pipes of the first electromagnetic valve (41) and the second electromagnetic valve (42) are connected to the main oil return pipe of the valve block (1), the first logic valve (31) and the second logic valve (32) are connected in parallel, the output end of the first logic valve (31) is connected with the soft start valve (9), the output oil pipe of the soft start valve (9) is connected with the second anti-suction one-way valve (62), the output oil pipe of the second logic valve (32) is connected with the first anti-suction one-way valve (61), and the output ends of the first anti-suction one-way valve (61) and the second anti-suction one-way valve (62) are connected to the main oil return pipe.

2. The hydraulic valve package for a workover truck of claim 1, wherein, The valve block (1) is provided with a pressure measuring connector (7), and the pressure measuring connector (7) is connected with a pressure gauge (20).

3. The hydraulic valve manifold for a workover truck of claim 1, wherein, The valve block (1) is connected with a speed regulating valve (19), the oil inlet end of the speed regulating valve (19) is connected with the oil overflow end of the pilot overflow valve (2), and the oil outlet end of the speed regulating valve (19) is connected with an oil discharge pipeline.

4. The hydraulic valve manifold for a workover rig truck of claim 3, wherein, The oil discharge pipeline is provided with an oil discharge filter (18).

5. The hydraulic valve manifold for a workover rig truck of claim 1 wherein, The valve block (1) is provided with a lifting ring (8).

6. A hydraulic system for a high horsepower cementing truck, comprising: The hydraulic valve group for heavy-duty well cementing comprises the hydraulic valve group for heavy-duty well cementing according to any one of claims 1-4.

7. The hydraulic system for a workover rig truck of claim 6, wherein, The hydraulic valve group for heavy-duty well cementing comprises an engine starting motor (14) and a centrifugal pump driving motor (15), the oil inlet end of the engine starting motor (14) is connected with the oil outlet end of the soft start valve (9), the oil inlet end of the centrifugal pump driving motor (15) is connected with the oil outlet end of the second logic valve (32), and the oil outlet ends of the engine starting motor (14) and the centrifugal pump driving motor (15) are connected to the main oil return pipe.

8. The hydraulic system for a workover rig truck of claim 7, wherein, The main oil return pipe is provided with a hydraulic oil radiator (16) and an oil return filter (17), the hydraulic oil radiator (16) is connected to the oil outlet ends of the engine starting motor (14) and the centrifugal pump driving motor (15), and the oil return filter (17) is connected to the oil outlet end of the hydraulic oil radiator (16).

9. The hydraulic system for a workover rig truck of claim 6, wherein, The oil inlet end of the working oil pipe is sequentially provided with an oil suction filter (10), an oil suction ball valve (11), a hydraulic pump (12) and a high-pressure filter (13), and the oil outlet end of the high-pressure filter (13) is connected with the oil inlet end of the valve block (1).

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