Fracturing pry with self-balancing damping system

Abstract

The invention relates to a fracturing pry with a self-balancing damping system. Comprising a skid frame, a damping system, a controller, a balance detector and multiple groups of leveling units, and the multiple groups of leveling units are distributed along the peripheral side of the skid frame; the leveling unit comprises a telescopic mechanism and an adjusting mechanism; the fixed end of the telescopic mechanism is rotationally connected with the damping system, and the telescopic end of the telescopic mechanism is connected with the sledge frame through the adjusting mechanism. The balance detector is used for detecting the tilt angle of the sledge frame; and the controller responds to a sledge frame inclination angle signal transmitted by the balance detector to regulate and control the telescopic mechanism and the adjusting mechanism until the sledge frame is horizontal. The fracturing sledge is provided with a vibration reduction system, and resonance harm is avoided; meanwhile, by arranging a balance detector and a plurality of groups of leveling units matched with the balance detector, the skid frame can be automatically leveled, and the influence of field hardening and substandard flatness on the performance of the fracturing skid and the hoisting operation is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of fracturing equipment, and particularly relates to a fracturing skid with a self-balancing shock absorption system. Background Art

[0002] At present, the conventional fracturing equipment used in oil and gas field exploitation is diesel engine-driven. This driving method drives the fracturing pump through a gearbox and a universal shaft to fracture the oil layer. Such equipment uses a high-power diesel engine, consumes a large amount of diesel during fracturing operations, and has disadvantages such as large volume, high noise, and high pollution. Moreover, the gear ratio of the gearbox is limited and cannot meet the requirements of specific displacement and pressure in fracturing operations.

[0003] During the actual fracturing operation process, due to the non-compliance of the well site ground hardening and flatness in the fracturing operation, after the fracturing skid arrives at the destination, it is necessary to repeatedly adjust the position to ensure that the skid frame is in a horizontal position after landing, so as to avoid excessive deformation and affect the performance of the equipment. However, due to the cumbersome leveling, the transfer of the fracturing skid is very time-consuming and laborious, reducing the production efficiency and increasing the production cost. Moreover, the fracturing skid will generate resonance when working in certain gears, which will also affect the equipment performance and efficiency. Summary of the Invention

[0004] In view of the above problems existing in the prior art, the present invention provides a fracturing skid with a self-balancing shock absorption system, which can automatically level the skid frame and reduce resonance during operation.

[0005] To achieve the above object, the technical solution provided by the present invention is as follows:

[0006] The present application provides a fracturing skid with a self-balancing shock absorption system, including a skid frame, a shock absorption system, a controller, a balance detector, and multiple groups of leveling units. The multiple groups of leveling units are distributed along the circumference of the skid frame;

[0007] The leveling unit includes a telescopic mechanism and an adjusting mechanism; the fixed end of the telescopic mechanism is rotatably connected to the shock absorption system, and the telescopic end of the telescopic mechanism is connected to the skid frame through the adjusting mechanism;

[0008] The balance detector is used to detect the inclination angle of the skid frame; the controller controls the telescopic mechanism and the adjusting mechanism in response to the skid frame inclination angle signal transmitted by the balance detector until the skid frame is horizontal.

[0009] Optionally, the adjusting mechanism includes a four-bar linkage mechanism composed of a upper swing arm, an upper connecting seat, a lower swing arm, and a lower connecting seat connected in sequence. A swing telescopic cylinder is connected between the upper swing arm and the lower swing arm. The upper connecting seat is connected to the telescopic end of the telescopic mechanism, and the lower connecting seat is connected to the skid frame.

[0010] Optionally, the shock absorption system includes an upper mounting seat, a lower mounting seat opposite to the upper mounting seat, shock absorption blocks, and a plurality of return springs. The shock absorption blocks are arranged between the upper mounting seat and the lower mounting seat, and the return springs are evenly arranged around the circumference of the upper mounting seat between the upper mounting seat and the lower mounting seat. The upper mounting seat is rotatably connected to the fixed end of the telescopic mechanism through a pin shaft.

[0011] Optionally, the balance detector includes an inclination sensor, and the inclination sensor is arranged on the skid frame.

[0012] Optionally, multiple groups of leveling units are evenly arranged around the circumference of the skid frame.

[0013] Optionally, the telescopic mechanism includes a telescopic electric cylinder.

[0014] Optionally, it further includes a driving motor. The fracturing pump of the fracturing skid is arranged on the skid frame, and the driving motor provides power for the fracturing pump through a transmission shaft.

[0015] Optionally, the driving motor adopts variable frequency drive.

[0016] Optionally, the skid frame includes an upper skid frame and a lower skid frame. The upper skid frame is detachably connected to the lower skid frame, and a lifting ring is arranged on the upper skid frame.

[0017] Optionally, it further includes a lubrication system and a heat dissipation system. The lubrication system is used to lubricate the moving parts of the plunger pump, and the heat dissipation system is used to cool the plunger pump.

[0018] Compared with the prior art, the present application has at least the following beneficial effects:

[0019] In the present invention, the fracturing skid is configured with a shock absorption system to avoid the harm of resonance. At the same time, by setting a balance detector and multiple groups of leveling units that cooperate with it, the automatic leveling of the skid frame can be realized, reducing the impact of unqualified site hardening and flatness on the performance of the fracturing skid itself and the lifting operation, greatly improving the transfer and moving speed, increasing production efficiency, and reducing production costs. In the present application, the pressure pump is driven by a driving motor, and the driving motor adopts variable frequency drive, converting electrical energy into kinetic energy to drive the plunger pump to work, realizing stepless adjustment of pressure and flow. Diesel is not required during the operation process, which is energy-saving and environmentally friendly. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1Schematic structural diagram of a fracturing skid with a self - balancing shock absorption system in an embodiment of the present application;

[0022] Figure 2 Schematic structural diagram of the skid frame in an embodiment of the present application;

[0023] Figure 3 Schematic structural diagram of the adjusting mechanism in an embodiment of the present application;

[0024] Figure 4 Schematic structural diagram of the shock absorption system in an embodiment of the present application;

[0025] Explanation of reference numerals:

[0026] 1. Skid frame; 2. Heat dissipation system; 3. Driving motor; 4. Transmission shaft; 5. Plunger pump; 6. Controller; 7. Shock absorption system; 71. Upper mounting seat; 72. Lower mounting seat; 73. Shock absorption block; 74. Pin shaft; 75. Bolt; 76. Return spring; 8. Leveling unit; 81. Telescopic mechanism; 82. Adjusting mechanism; 821. Upper connecting seat; 822. Lower connecting seat; 823. Upper swing arm; 824. Lower swing arm; 825. Swing telescopic cylinder; 83. Balance detector; 9. Lubrication system; 10. Manifold system. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation to the present application and its application or use.

[0028] Embodiment 1

[0029] As shown in Figure 1 and Figure 2 A fracturing skid with a self - balancing shock absorption system includes a skid frame 1, a shock absorption system 7, a controller 6, a balance detector 83, and multiple groups of leveling units 8. The multiple groups of leveling units 8 are distributed along the circumferential side of the skid frame 1;

[0030] The leveling unit 8 includes a telescopic mechanism 81 and an adjusting mechanism 82; the fixed end of the telescopic mechanism 81 is rotatably connected to the shock absorption system 7, and the telescopic end of the telescopic mechanism 81 is connected to the skid frame 1 through the adjusting mechanism 82;

[0031] The balance detector 83 is used to detect the inclination angle of the skid frame 1; the controller 6 controls the telescopic mechanism 81 and the adjusting mechanism 82 in response to the inclination angle signal of the skid frame 1 transmitted by the balance detector 83 until the skid frame 1 is horizontal.

[0032] In the present invention, the fracturing skid is configured with a vibration damping system to avoid the harm of resonance. At the same time, by setting a balance detector 83 and multiple groups of leveling units 8 cooperating therewith, the balance sensor transmits the attitude information of the skid frame 1 to the controller 6, and the controller 6 adjusts the telescopic mechanism 81 and the adjusting mechanism 82 until the skid frame 1 is horizontal. The fracturing skid of the present invention can realize the automatic leveling of the skid frame 1, reduce the influence of unqualified site hardening and flatness on the performance of the fracturing skid itself and the hoisting operation, greatly improve the transfer and moving speed, improve the production efficiency and reduce the production cost.

[0033] Embodiment 2

[0034] The difference between this embodiment and Embodiment 1 is that as Figure 2 and Figure 3 shown, multiple groups of leveling units 8 are evenly arranged on the periphery of the skid frame 1. In this embodiment, 6 groups of leveling units 8 are provided, and 3 groups are arranged on each side of the skid frame 1. The adjusting mechanism 82 includes a four-bar linkage mechanism composed of an upper swing arm 823, an upper connecting seat 821, a lower swing arm 824 and a lower connecting seat 822 connected in sequence. The upper swing arm 823 and the lower swing arm 824 are connected by a swing telescopic cylinder 825. The upper connecting seat 821 is connected to the telescopic end of the telescopic mechanism 81, and the lower connecting seat 822 is connected to the skid frame 1. In this embodiment, the telescopic mechanism 81 adopts a telescopic electric cylinder, and the swing telescopic cylinder 825 is also driven by electricity. Under the action of the swing telescopic cylinder 825, the telescopic mechanism 81 can be extended and retracted.

[0035] The balance detector 83 includes an inclination sensor, and the inclination sensor is arranged on the skid frame 1. The inclination between the skid frame 1 and the horizontal direction is detected by the inclination sensor, and the information is transmitted to the controller 6. The controller 6 controls the extension and retraction of the swing telescopic cylinder 825 and the telescopic electric cylinder to realize the automatic leveling of the skid frame 1.

[0036] As Figure 4 shown, the shock absorption system 7 includes an upper mounting seat 71, a lower mounting seat 72 opposite to the upper mounting seat 71, a shock absorption block 73 and a plurality of return springs 76. The shock absorption block 73 is arranged between the upper mounting seat 71 and the lower mounting seat 72. The return springs 76 are evenly arranged around the upper mounting seat 71 between the upper mounting seat 71 and the lower mounting seat 72 and fixed by bolts 75. The upper mounting seat 71 is rotatably connected to the fixed end of the telescopic mechanism 81 through a pin shaft 74. The lower mounting seat 72 of the shock absorption system 7 is placed on the ground. By connecting the telescopic mechanism 81 with the shock absorption system 7, the contact area with the ground is increased, a stable fulcrum is provided for the telescopic mechanism 81, and at the same time, under the elastic force of the shock absorption block 73 and the return springs 76, the natural frequency of the skid frame 1 is changed, and the resonance problem during the operation of the fracturing skid is alleviated.

[0037] A fracturing skid with a self-balancing shock absorbing system also includes a drive motor 3. The fracturing pump of the fracturing skid is arranged on a skid frame 1. The skid frame 1 serves as a bearing mechanism and provides installation positions for various components. The drive motor 3 provides power to the fracturing pump through a transmission shaft 4. The drive motor 3 adopts a variable frequency drive. After the plunger pump 5 pressurizes the fracturing fluid, it is injected into the bottom of the well at a certain flow rate to complete the fracturing operation. In this embodiment, the plunger pump 5 adopts a multi-cylinder structure with low sprint and large stroke to achieve ultra-high pressure and large flow output of the fracturing fluid to meet the needs of special fracturing operations.

[0038] In the present application, the driving motor 3 adopts variable frequency drive to convert electrical energy into kinetic energy, driving the plunger pump 5 to work, realizing stepless regulation of pressure and flow, and the operation process does not require diesel, which is energy-saving and environmentally friendly; and the high power demand of the fracturing operation is guaranteed.

[0039] In this embodiment, the transmission shaft 4 is in the form of a universal joint, which avoids the problem of aligning the shaft extensions of the fracturing pump and the drive motor 3.

[0040] The skid frame 1 includes an upper skid frame and a lower skid frame. The upper skid frame is detachably connected to the lower skid frame, and a lifting ring is provided on the upper skid frame. When maintenance is required, the upper skid frame can be directly disassembled to ensure sufficient maintenance space. When relocation is required, the fracturing skid can be lifted onto a transport flatbed truck through the lifting ring on the top of the skid frame for relocation transportation.

[0041] In this embodiment, a fracturing skid with a self-balancing shock absorbing system also includes a lubrication system 9 and a heat dissipation system 2. Both the lubrication system 9 and the heat dissipation system 2 are arranged on the skid frame 1. The lubrication system 9 is used to lubricate the moving parts of the plunger pump 5. The lubrication system 9 uses a double gear pump and a large-capacity grease pump for pressurization, and continuously delivers gear oil and grease to the moving parts of the plunger pump 5 to achieve continuous and effective lubrication and ensure the stable operation of the plunger pump 5. The heat dissipation system 2 is used to cool the plunger pump 5. In this embodiment, the heat dissipation system 2 is driven by a dual-frequency motor to achieve the adjustment of the radiator air volume and wind speed, meet the heat dissipation requirements of the plunger pump 5 at different temperatures, and achieve energy saving and noise reduction to a certain extent.

[0042] The controller 6 is connected to the drive motor 3 and the heat dissipation system 2 through a wiring harness to control the speed and power of the drive motor 3 and the heat dissipation system 2, so that the plunger pump 5 outputs fracturing fluid with appropriate pressure and displacement, and the heat dissipation system 2 can better dissipate heat for the plunger pump 5 to meet the requirements of the fracturing operation.

[0043] The present embodiment also includes a manifold system 10, which includes a suction manifold and a discharge manifold. The discharge manifold is connected to the discharge port of the plunger pump 5 by locking bolts to discharge the fracturing fluid, and the suction manifold is connected to the suction port of the plunger pump 5 by bolts to suck in the fracturing fluid.

[0044] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A fracturing skid with a self-balancing shock absorbing system, characterized in that: It includes a skid frame, a shock absorbing system and a controller, a balance detector and multiple groups of leveling units, wherein the multiple groups of leveling units are distributed along the periphery of the skid frame; The leveling unit includes a telescopic mechanism and an adjusting mechanism; the fixed end of the telescopic mechanism is rotatably connected to the shock absorbing system, and the telescopic end of the telescopic mechanism is connected to the skid frame through the adjusting mechanism; The balance detector is used to detect the inclination angle of the skid frame; the controller regulates the telescopic mechanism and the adjustment mechanism in response to the skid frame inclination angle signal transmitted by the balance detector until the skid frame is level.

2. The fracturing skid with a self-balancing shock absorbing system according to claim 1, characterized in that: The adjusting mechanism comprises a four-bar linkage consisting of an upper swing arm, an upper connecting seat, a lower swing arm and a lower connecting seat connected in sequence, the upper swing arm and the lower swing arm are connected through a swing telescopic cylinder, the upper connecting seat is connected to the telescopic end of the telescopic mechanism, and the lower connecting seat is connected to the skid frame.

3. The fracturing skid with a self-balancing shock absorbing system according to claim 1, characterized in that: The shock absorbing system includes an upper mounting seat, a lower mounting seat opposite to the upper mounting seat, a shock absorbing block and a plurality of return springs. The shock absorbing block is arranged between the upper mounting seat and the lower mounting seat. The return springs are evenly arranged between the upper mounting seat and the lower mounting seat along the circumference of the upper mounting seat. The upper mounting seat is rotatably connected to the fixed end of the telescopic mechanism through a pin shaft.

4. The fracturing skid with a self-balancing shock absorbing system according to claim 1, characterized in that: The balance detector includes an inclination sensor disposed on a skid frame.

5. The fracturing skid with a self-balancing shock absorbing system according to claim 1, characterized in that: A plurality of groups of leveling units are evenly arranged around the skid frame.

6. The fracturing skid with a self-balancing shock absorbing system according to claim 1, characterized in that: The telescopic mechanism comprises a telescopic electric cylinder.

7. The fracturing skid with a self-balancing shock absorbing system according to claim 1, characterized in that: It also includes a driving motor. The fracturing pump of the fracturing skid is arranged on the skid frame, and the driving motor provides power to the fracturing pump through a transmission shaft.

8. The fracturing skid with a self-balancing shock absorbing system according to claim 7, characterized in that: The driving motor adopts variable frequency drive.

9. The fracturing skid with a self-balancing shock absorbing system according to claim 1, characterized in that: The skid frame comprises an upper skid frame and a lower skid frame. The upper skid frame is detachably connected to the lower skid frame, and a lifting ring is arranged on the upper skid frame.

10. The fracturing skid with a self-balancing shock absorbing system according to claim 7, characterized in that: It also includes a lubrication system and a heat dissipation system. The lubrication system is used to lubricate the moving parts of the plunger pump, and the heat dissipation system is used to cool the plunger pump.

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