Novel constant-pressure hydraulic station for petroleum drilling machine

Abstract

The utility model discloses a novel constant-pressure hydraulic station for a petroleum drilling machine. The novel constant-pressure hydraulic station comprises a first pump motor group, a second pump motor group, a control valve group, a circulating cooling system, an auxiliary system, a hydraulic oil tank, an electric cabinet and a multi-way valve, the first pump motor set is composed of a hydraulic pump, a first proportional directional valve, a second proportional directional valve, a first damper, a second damper, a third damper, a fourth damper, a first one-way valve and a variable displacement mechanism, the hydraulic pump is driven by a motor, and an oil suction port is communicated with an oil tank through an oil suction filter; a first pressure oil port is respectively communicated with a variable mechanism spring cavity, a first proportional directional valve control cavity, a first proportional directional valve oil inlet, a second proportional directional valve control cavity and a second proportional directional valve oil inlet, and an oil outlet of the first proportional directional valve is communicated with a hydraulic pump oil drainage port through a third damper and a fourth damper; the hydraulic system has the advantages of oil supply and pressure supply according to needs, stepless adjustment of pressure, capability of realizing composite action, fast response, high efficiency, energy conservation, stable operation and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of petroleum drilling rig, concretely to a novel constant pressure hydraulic station for petroleum drilling rig. BACKGROUND

[0002] The hydraulic station is one of the essential equipment of the petroleum drilling rig and is an important component of the petroleum drilling rig, mainly providing power source and control for the hydraulic cathead, iron driller, hydraulic gas tongs, hydraulic slip and other mesa tools. With the continuous development of the petroleum drilling rig technology, especially the increasing demand for automatic drilling rigs, the requirements for the hydraulic station are becoming higher and higher, and the development is towards high frequency response and high efficiency and energy saving. At present, the hydraulic stations used on the petroleum drilling rig mainly have constant pressure control and load sensing control. The load sensing system can automatically match the pressure and flow required by the load according to the load requirement, and has good energy saving effect. However, the arrangement of the hydraulic equipment on the petroleum drilling rig is relatively dispersed, which leads to long oil supply and feedback oil paths, resulting in response delay when the load sensing system is used, lagging of the hydraulic tool action and affecting the work efficiency, and the ideal control effect cannot be achieved. The conventional constant pressure system can only provide one pressure, and when two or more pressures are required, the use of low-level pressure will inevitably lead to energy loss, causing the system to heat up, resulting in high oil temperature, which is easy to cause sealing failure and oil leakage, affecting the use effect. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a novel constant pressure hydraulic station for petroleum drilling rig to solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a novel constant pressure hydraulic station for petroleum drilling rig, comprising a first pump motor set, a second pump motor set, a control valve group, a circulating cooling system, an auxiliary system, a hydraulic oil tank, an electric control box and a multi-way valve.

[0005] The first pump motor set comprises a hydraulic pump, a motor, a first proportional directional valve, a second proportional directional valve, a first damper, a second damper, a third damper, a fourth damper, a first check valve and a variable mechanism. The hydraulic pump is driven by the motor. The oil suction port is communicated with the oil tank through an oil suction filter. The first oil outlet port is communicated with the variable mechanism spring cavity, the first proportional directional valve control cavity, the first proportional directional valve oil inlet port, the second proportional directional valve control cavity and the second proportional directional valve oil inlet port. The oil outlet port of the first proportional directional valve is communicated with the hydraulic pump oil discharge port through the third damper and the fourth damper. The oil return ports are connected with the oil outlet port of the second proportional directional valve and the fourth damper respectively. The oil return port of the second proportional directional valve is communicated with the hydraulic pump oil discharge port. The second proportional directional valve spring cavity is communicated with the hydraulic pump oil discharge port through the second damper. The piston cavity of the variable mechanism is connected with the oil outlet port of the first proportional directional valve and the hydraulic pump oil discharge port respectively. The hydraulic pump oil discharge port is connected with the oil tank.

[0006] The first oil pressure port of the hydraulic pump is connected with the first control port of the control valve group through the first damper and the first check valve, and the oil inlet of the first check valve is communicated with the spring cavity of the second proportional directional valve.

[0007] Preferably, the second pump motor group is identical in structure with the first pump motor group and serves as a standby pump motor group of the novel constant-pressure hydraulic station, and the second oil pressure port of the hydraulic pump of the second pump motor group is connected with the second control port of the control valve group through the first damper and the first check valve.

[0008] Preferably, the control valve group comprises a second check valve, a third check valve, a first stop valve, a second stop valve, an accumulator, an oil pressure filter, an overflow valve, an electromagnetic directional valve and a proportional overflow valve, the oil inlets of the second check valve and the third check valve are connected with the first oil inlet of the first pump motor group and the second oil inlet of the second pump motor group respectively, the outlets of the second check valve and the third check valve are connected with the oil inlet of the accumulator and the oil inlet of the overflow valve through the oil pressure filter, and the oil outlet of the proportional overflow valve is connected with the oil return of the control valve group.

[0009] Preferably, the first stop valve is arranged between the accumulator and the outlets of the second check valve and the third check valve, and the second stop valve is arranged between the oil return of the control valve group.

[0010] Preferably, the first control port and the second control port of the control valve group are communicated and connected with the oil inlet of the electromagnetic directional valve, the oil return of the electromagnetic directional valve is connected with the oil return of the control valve group, the working oil port A of the electromagnetic directional valve is blocked, the working oil port B is connected with the proportional overflow valve, the oil outlet of the proportional overflow valve is connected with the oil return of the control valve group, and the oil return of the control valve group is communicated with the oil tank through the cooler and the oil return filter.

[0011] Preferably, the circulating cooling system comprises a circulating pump, a circulating motor, a fourth check valve and a cooler, the circulating pump is driven by the circulating motor, and the circulating hydraulic oil is communicated with the oil tank through the circulating pump, the fourth check valve, the cooler and the oil return filter.

[0012] Preferably, the auxiliary system comprises a liquid level sensor, a temperature sensor and a heater, the parameters of the auxiliary system are set and controlled by the electric control box, the electric control box is connected with the electric control system of the driller's house through the Ethernet line and realizes integrated control of the driller.

[0013] The working principle of the utility model is as follows:

[0014] The utility model provides a novel constant pressure hydraulic station for petroleum drilling machine, including first pump motor unit, second pump motor unit, control valve group, circulating cooling system, auxiliary system, hydraulic oil tank, electric control box and multipath valve, wherein parallelly connected first proportional reversing valve and second proportional reversing valve for pressure limiting are arranged between the hydraulic pump export and variable mechanism, wherein the spring of first proportional reversing valve is hard spring, is used for setting the maximum working pressure of hydraulic pump, and the second proportional reversing valve is soft spring, and the spring cavity is communicated with proportional overflow valve through first control port, electromagnetic reversing valve, adopts H mid position function, and the work port A is dead, and B port connects proportional overflow valve, when electromagnetic reversing valve is in the mid position, the hydraulic pump unloads, is in low pressure small displacement standby state, when electromagnetic reversing valve is in left position, the maximum pressure of hydraulic pump output, namely first proportional reversing valve set pressure, when electromagnetic reversing valve is in right position, the set pressure of proportional overflow valve, and the set pressure of proportional overflow valve can be set in advance on integrated driller according to different load, the pump motor unit export supplies oil to multipath valve through pressure oil filter, and simultaneously connects the oil inlet of energy accumulator and overflow valve, the parameter setting and control of hydraulic system are controlled by electric control box, and the electric control box is connected with the electric control system of driller room through ethernet cable, realizes integrated control of driller, has on-demand oil supply and pressure, stepless pressure regulation, can realize composite action, fast response, high efficiency, energy saving, stable operation and other advantages.

[0015] The utility model has the advantages that:

[0016] The utility model parallelly connected two proportional reversing valves between the hydraulic pump export and variable mechanism, wherein the spring of first proportional reversing valve is hard spring, is used for setting the maximum working pressure of hydraulic pump, and the second proportional reversing valve is soft spring, and the spring cavity is communicated with electromagnetic reversing valve oil inlet, electromagnetic reversing valve adopts H mid position function, and the work port A is dead, and B port connects proportional overflow valve, when electromagnetic reversing valve is in the mid position, the hydraulic pump unloads, is in low pressure small displacement standby state, when electromagnetic reversing valve is in left position, the maximum pressure of hydraulic pump output, namely first proportional reversing valve set pressure, when electromagnetic reversing valve is in right position, the set pressure of proportional overflow valve, and the set pressure of proportional overflow valve can be set in advance on integrated driller according to different load, and the flow of hydraulic pump output can be adjusted through multipath valve and hydraulic pump cooperation, thereby realizes that hydraulic station output pressure and flow can be set as required, satisfies response time, reaches the purpose that high efficiency, energy saving and emission reduction are achieved, and the energy accumulator is arranged at the export of hydraulic pump, can effectively solve the problem of pressure fluctuation, makes hydraulic station operation more stable and reliable.

[0017] The utility model is not only limited to hydraulic station use, also is applicable to the hydraulic source in the execution mechanism distance is far, and each execution mechanism pressure is different, has the hydraulic system in composite action working condition. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is the hydraulic system working principle diagram of the utility model;

[0019] Fig. 2 is the hydraulic pump principle diagram in the utility model;

[0020] Fig. 3 is the electric control control schematic diagram in the utility model;

[0021] In the figure: 1. first pump motor unit, 10. variable mechanism, 11. hydraulic pump, 12. motor, 13. first proportional directional valve, 14. second proportional directional valve, 15. first damping, 16. second damping, 17. third damping, 18. fourth damping, 19. first check valve, 2. second pump motor unit, 3. control valve group, 30. second check valve, 31. third check valve, 32. first stop valve, 33. second stop valve, 34. accumulator, 35. oil filter, 36. overflow valve, 37. electromagnetic directional valve, 38. proportional overflow valve, 4. circulating cooling system, 40. circulating pump, 41. circulating pump motor, 42. fourth check valve, 43. cooler, 5. oil return filter, 6. oil tank, 7. auxiliary system, 70. liquid level sensor, 71. temperature sensor, 72. heater, 8. electric control box, 81. Ethernet cable, 82. driller room electric control system, 9. oil suction filter, 100. first oil inlet, 101. second oil inlet, 102. first control port, 103. second control port, 104. oil return, 200. multi-way valve. DETAILED DESCRIPTION

[0022] The utility model will be described further in detail in connection with the drawings.

[0023] As Figs. 1-3The new constant pressure hydraulic station for oil drilling rig comprises a first pump motor set 1, a second pump motor set 2, a control valve group 3, a circulating cooling system 4, an auxiliary system 7, a hydraulic oil tank 6, an electric control box 8 and a multi-way valve 200. The first pump motor set 1 comprises a hydraulic pump 11, a motor 12, a first proportional reversing valve 13, a second proportional reversing valve 14, a first damper 15, a second damper 16, a third damper 17, a fourth damper 18, a first check valve 19 and a variable mechanism 10. The hydraulic pump 11 is driven by the motor 12. The oil suction port is communicated with the oil tank 6 through an oil suction filter 9. The first oil pressure port 100 is communicated with the spring cavity of the variable mechanism 10, the control cavity of the first proportional reversing valve 13, the oil inlet of the first proportional reversing valve 13, the control cavity of the second proportional reversing valve 14 and the oil inlet of the second proportional reversing valve 14 respectively. The oil outlet of the first proportional reversing valve 13 is communicated with the oil discharge port of the hydraulic pump 11 through the third damper 17 and the fourth damper 18. The oil return ports are connected with the oil outlet of the second proportional reversing valve 14 and the fourth damper 18 respectively. The oil return port of the second proportional reversing valve 14 is communicated with the oil discharge port of the hydraulic pump 11. The spring cavity of the second proportional reversing valve 14 is communicated with the oil discharge port of the hydraulic pump 11 through the second damper 16. The piston cavity of the variable mechanism 10 is connected with the oil outlet of the first proportional reversing valve 13 and the oil discharge port of the hydraulic pump 11 respectively. The oil discharge port of the hydraulic pump 11 is connected with the oil tank 6. The first oil pressure port 100 of the hydraulic pump 11 is connected with the first control port 102 of the control valve group 3 through the first damper 15 and the first check valve 19. Meanwhile, the oil inlet of the first check valve 19 is communicated with the spring cavity of the second proportional reversing valve 14.

[0024] The second pump motor set 2 is the same as the first pump motor set 1 in structure and serves as a standby pump motor set of the new constant pressure hydraulic station. The second oil inlet 101 of the hydraulic pump of the second pump motor set 2 is connected with the second control port 103 of the control valve group 3 through the first damper 15 and the first check valve 19.

[0025] The control valve group 3 comprises a second check valve 30, a third check valve 31, a first stop valve 32, a second stop valve 33, an accumulator 34, an oil filter 35, an overflow valve 36, an electromagnetic reversing valve 37 and a proportional overflow valve 38, the oil inlet of the second check valve 30 and the third check valve 31 is connected with the first oil inlet 100 of the first pump motor group 1 and the second oil inlet 101 of the second pump motor group 2 respectively, the oil outlet of the second check valve 30 and the third check valve 31 is connected with the multi-way valve 200 through the oil filter 35, and the oil inlet of the accumulator 34 and the overflow valve 36 is connected with the oil outlet of the second check valve 30 and the third check valve 31; the first stop valve 32 is arranged between the accumulator 34 and the oil outlet of the second check valve 30 and the third check valve 31, and the second stop valve 33 is arranged between the oil return 104 of the control valve group 3; the first control port 102 and the second control port 103 of the control valve group 3 are connected with the oil inlet of the electromagnetic reversing valve 37, the oil return of the electromagnetic reversing valve 37 is connected with the oil return 104 of the control valve group 3, the working oil port A of the electromagnetic reversing valve 37 is blocked, the working oil port B is connected with the proportional overflow valve 38, the oil outlet of the proportional overflow valve 38 is connected with the oil return 104 of the control valve group 3, and the oil return 104 of the control valve group 3 is communicated with the oil tank 6 through the cooler 43 and the oil return filter 5.

[0026] The circulating cooling system 4 comprises a circulating pump 40, a circulating motor 41, a fourth check valve 42 and a cooler 43; the circulating pump 40 is driven by the circulating motor 41; and the circulating cooling hydraulic oil is communicated with the oil tank 6 through the circulating pump 40, the fourth check valve 42, the cooler 43 and the oil return filter 5.

[0027] The auxiliary system 7 comprises a liquid level sensor 70, a temperature sensor 71 and a heater 72; the parameter setting and control of the auxiliary system are controlled by the electric control box 8; and the electric control box 8 is connected with the driller's electric control system 82 through the Ethernet wire 81 and realizes integrated control of the driller.

[0028] The working principle of the utility model is as follows:

[0029] The utility model provides a novel constant pressure hydraulic station for petroleum drilling machine, including first pump motor set 1, second pump motor set 2, control valve group 3, circulating cooling system 4, auxiliary system 7, oil tank 6, electric control box 8 and multipath valve 200, wherein first proportional reversing valve 13 and second proportional reversing valve 14 for limiting pressure are arranged in parallel between hydraulic pump 11 outlet and variable mechanism 10, wherein the spring of first proportional reversing valve 13 is hard spring, is used to set the maximum working pressure of hydraulic pump 11, and second proportional reversing valve 14 is soft spring, and the spring cavity thereof is communicated with proportional overflow valve 38 through first control port, electromagnetic reversing valve 37, electromagnetic reversing valve 37 adopts H mid-position function, and the work port A is blocked, and B port connects proportional overflow valve 38, when electromagnetic reversing valve 37 is in the mid-position, hydraulic pump unloads, and is in low pressure small displacement standby state, when electromagnetic reversing valve 37 is in left position, the maximum pressure of hydraulic pump 11 is output, namely the pressure set by first proportional reversing valve 13, when electromagnetic reversing valve 37 is in right position, the pressure set by proportional overflow valve 38 is output by hydraulic pump 11, and the pressure set by proportional overflow valve 38 can be set in advance on integrated driller according to different load, pump motor set outlet supplies oil to multipath valve 200 through pressure oil filter 35, and is connected with the oil inlet of energy accumulator 34 and overflow valve 36 simultaneously, the parameter setting and control of hydraulic system are controlled by electric control box 8, and electric control box 8 is communicated with driller room electric control system 82 through ethernet cable 81, realizes integrated control of driller, and the utility model has the advantages of on-demand oil supply and pressure supply, stepless pressure adjustment, composite action realization, fast response, energy saving, stable operation and the like.

[0030] The above is only the preferred example of the utility model. It should be noted that for ordinary skilled person in the art, under the technical inspiration provided by the utility model, as the common knowledge in mechanical field, other equivalent variants and improvements can also be made, and should also be regarded as the protection scope of the utility model.

Claims

1. A novel constant-pressure hydraulic station for oil drilling rigs, characterized in that: It includes a first pump motor unit (1), a second pump motor unit (2), a control valve group (3), a circulating cooling system (4), an auxiliary system (7), a hydraulic oil tank (6), an electrical control box (8), and a multi-way valve (200). The first pump motor unit (1) includes a hydraulic pump (11), a motor (12), a first proportional directional valve (13), a second proportional directional valve (14), a first damper (15), a second damper (16), a third damper (17), a fourth damper (18), a first check valve (19), and a variable mechanism (10). The hydraulic pump (11) is driven by the motor (12). The oil inlet of the hydraulic pump (11) is connected to the oil tank (6) through the oil inlet filter (9). The first pressure port (100) is connected to the spring chamber of the variable mechanism (10), the control chamber of the first proportional directional valve (13), the oil inlet of the first proportional directional valve (13), the control chamber of the second proportional directional valve (14), and the second proportional directional valve (15). 4) The oil inlet is connected. The oil outlet of the first proportional directional valve (13) is connected to the oil drain port of the hydraulic pump (11) through the third damper (17) and the fourth damper (18). The oil return port of the first proportional directional valve (13) is connected to the oil outlet of the second proportional directional valve (14) and the fourth damper (18) respectively. The oil return port of the second proportional directional valve (14) is connected to the oil drain port of the hydraulic pump (11). The spring chamber of the second proportional directional valve (14) is connected to the oil drain port of the hydraulic pump (11) through the second damper (16). The piston chamber of the variable mechanism (10) is connected to the outlet of the first proportional directional valve (13) and the oil drain port of the hydraulic pump (11) respectively. The oil drain port of the hydraulic pump (11) is connected to the oil tank (6). The first pressure port (100) of the hydraulic pump (11) is connected to the first control port (102) of the control valve group (3) through the first damper (15) and the first check valve (19), while the oil inlet of the first check valve (19) is connected to the spring cavity of the second proportional directional valve (14).

2. The novel constant-pressure hydraulic station for oil drilling rigs according to claim 1, characterized in that: The second pump motor unit (2) has the same structure as the first pump motor unit (1) and serves as a backup pump motor unit for the new constant pressure hydraulic station. The second oil inlet (101) of the hydraulic pump of the second pump motor unit (2) is connected to the second control port (103) of the control valve group (3) through the first damper (15) and the first check valve (19).

3. A novel constant-pressure hydraulic station for oil drilling rigs according to claim 1 or 2, characterized in that: The control valve group (3) includes a second check valve (30), a third check valve (31), a first shut-off valve (32), a second shut-off valve (33), an accumulator (34), a pressure oil filter (35), a relief valve (36), a solenoid directional valve (37), and a proportional relief valve (38). The oil inlets of the second check valve (30) and the third check valve (31) are respectively connected to the first pressure oil port (100) of the first pump motor group (1) and the second oil inlet (101) of the second pump motor group (2). The outlets of the second check valve (30) and the third check valve (31) supply oil to the multi-way valve (200) through the pressure oil filter (35) and are simultaneously connected to the oil inlets of the accumulator (34) and the relief valve (36).

4. A novel constant-pressure hydraulic station for oil drilling rigs according to claim 3, characterized in that: A first shut-off valve (32) is provided between the accumulator (34) and the outlets of the second check valve (30) and the third check valve (31), and a second shut-off valve (33) is provided between the accumulator (34) and the return oil (104) of the control valve group (3).

5. A novel constant-pressure hydraulic station for oil drilling rigs according to claim 4, characterized in that: The first control port (102) and the second control port (103) of the control valve group (3) are connected to the oil inlet of the solenoid directional valve (37). The return oil of the solenoid directional valve (37) is connected to the return oil (104) of the control valve group (3). The working oil port A of the solenoid directional valve (37) is blocked, and the working oil port B is connected to the proportional relief valve (38). The outlet of the proportional relief valve (38) is connected to the return oil (104) of the control valve group (3). The return oil (104) of the control valve group (3) is connected to the oil tank (6) through the cooler (43) and the return oil filter (5).

6. A novel constant-pressure hydraulic station for oil drilling rigs according to claim 5, characterized in that: The circulating cooling system (4) consists of a circulating pump (40), a circulating motor (41), a fourth check valve (42), and a cooler (43). The circulating pump (40) is driven by the circulating motor (41). The circulating cooling hydraulic oil is connected to the oil tank (6) through the circulating pump (40), the fourth check valve (42), the cooler (43), and the return oil filter (5).

7. A novel constant-pressure hydraulic station for oil drilling rigs according to claim 6, characterized in that: The auxiliary system (7) includes a liquid level sensor (70), a temperature sensor (71), and a heater (72). The parameter settings and control of the auxiliary system (7) are controlled by the electrical control box (8). The electrical control box (8) is connected to the driller's room electrical control system (82) via an Ethernet cable (81) to realize integrated control of the driller.

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