Double-machine single-pump fracturing sledge

Abstract

The invention discloses a double-unit single-pump fracturing sledge, which relates to the technical field of oil-gas field development equipment, and comprises a sledge frame, a plurality of power units are arranged in the sledge frame, the plurality of power units can independently work or work together, the power units are respectively connected with a compound box through clutches, and the compound box is connected with a hydraulic cylinder. The compound box is connected with the input end of the fracturing pump through a transmission shaft, the output end of the fracturing pump is connected with one end of the manifold system, and the other end of the manifold system is connected with a wellhead. According to the invention, a plurality of power units can simultaneously or independently drive the fracturing pump to work, the requirements of deep and ultra-deep oil and gas exploitation are met, the use cost can be reduced when high-power operation is not needed, the service life of the power units is prolonged, and the system reliability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a double-engine single-pump fracturing skid, belonging to the technical field of oil and gas field development equipment. BACKGROUND

[0002] The fracturing skid is one of the core ground equipment in the fracturing operation of unconventional oil and gas resources such as shale gas, and the fracturing skid with the advantage of portability is widely used in various oil and gas field fracturing operations. The main task of the fracturing skid is to inject high-pressure fracturing fluid into the underground rock layer thousands of meters away at a very high pressure and flow rate, so as to press open the rock and form a channel for oil and gas flow.

[0003] The traditional fracturing skid equipment design scheme is that one set of power unit drives one fracturing pump to work, and the engine will work continuously at rated power. When the wellhead does not need high-power operation, the traditional fracturing skid will cause power waste. In actual well site fracturing operation, the reliability of the fracturing equipment is extremely high. In order to improve the reliability of the fracturing operation, multiple standby fracturing equipment will be prepared at the well site to prevent unexpected situations, thereby increasing the cost of the fracturing operation and also increasing the space for arranging the fracturing equipment. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings in the prior art, and to provide a double-engine single-pump fracturing skid, which can realize simultaneous or individual driving of the fracturing pump by multiple power units, meet the requirements of deep and ultra-deep oil and gas exploitation, reduce the use cost when high-power operation is not needed, prolong the service life of the power unit, and improve the system reliability.

[0005] To achieve the above purpose, the present application adopts the following technical scheme: The present application provides a double-engine single-pump fracturing skid, which comprises a skid frame, a plurality of power units are arranged in the skid frame, the plurality of power units can work individually or jointly, the power units are connected with a parallel car through clutches, the parallel car is connected with the input end of a fracturing pump through a transmission shaft, the output end of the fracturing pump is connected with one end of a manifold system, and the other end of the manifold system is connected with a wellhead.

[0006] Further, the power unit comprises an engine and a gearbox, the output end of the engine is connected with the input end of the gearbox, and the output end of the gearbox is connected with the input end of the clutch.

[0007] Further, the parallel car is provided with a plurality of input ends, the input ends correspond in number to the power units, and the input ends are connected with the output ends of the clutches.

[0008] Further, the parallel car is provided with one output end, and the output end is connected with the input end of the fracturing pump through the transmission shaft.

[0009] Furthermore, the number of power units is 2.

[0010] Furthermore, the two power units are arranged side by side along the width of the skid.

[0011] Furthermore, it also includes a radiator, which is connected to the power unit, the paralleling box, and the fracturing pump via pipes. The radiator is used to dissipate heat from the power unit, the paralleling box, and the fracturing pump.

[0012] Furthermore, the radiator, power unit, clutch, parallel transport box, drive shaft, fracturing pump, and manifold system are all located inside the skid and connected to the skid by fasteners.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: This invention is equipped with multiple power units, which can simultaneously drive the fracturing pump according to the well site operating conditions to meet the requirements of deep and ultra-deep oil and gas extraction. Alternatively, the engine load can be flexibly adjusted according to the actual construction power requirements, and a single power unit can be selected to drive the fracturing pump independently to save fuel and reduce operating costs. In the case of a single power unit, the two power units can work alternately, extending the service life of the power units and improving system reliability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a dual-machine single-pump fracturing skid in one embodiment of the present invention; Figure 2 This is a top view of the dual-machine single-pump fracturing skid in one embodiment of the present invention; In the diagram: 1-Radiator, 2-Power unit, 201-Engine, 202-Gearbox, 3-Clutch, 4-Parallel box, 401-Parallel box input, 402-Parallel box output, 5-Drive shaft, 6-Fracturing pump, 601-Fracturing pump input, 7-Manifold system, 8-Skirt. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example 1

[0016] like Figure 1 As shown, this embodiment of the invention provides a dual-machine single-pump fracturing skid, including a skid frame 8. In this embodiment, the skid frame 8 is a cuboid frame, and a power unit 2 is provided in the internal space enclosed by the skid frame 8. Multiple power units 2 are provided, which can realize independent operation or simultaneous operation.

[0017] In this embodiment, the number of power units 2 is 2, but it is not limited to this. Any other number that meets the fracturing operation conditions should also be acceptable. In this embodiment, the two power units 2 are arranged side by side along the width direction of the skid 8.

[0018] The power unit 2 includes an engine 201 and a gearbox 202. The output end of the engine 201 is connected to the input end of the gearbox 202, and the output end of the gearbox 202 is connected to the input end of the clutch 3. The output end of the clutch 3 is connected to the parallel operation box 4. The parallel operation box 4 has multiple input ends and one output end. The input ends 401 of the parallel operation box are respectively connected to the output ends of the corresponding clutches 3. The output end 402 of the parallel operation box is connected to the input end of the fracturing pump 6 through the drive shaft 5. The output end of the fracturing pump 6 is connected to one end of the manifold system 7, and the other end of the manifold system 7 is connected to the wellhead.

[0019] The working principle of this embodiment is as follows: Depending on the actual working conditions, when high-power operation is not required, one power unit 2 is activated. Power is transmitted sequentially through the clutch 3, the parallel transport box 4, and the drive shaft 5 to the fracturing pump 6. The fracturing pump 6 then injects high-pressure fracturing fluid into the wellhead through the manifold system 7 to perform fracturing operations. When deep or ultra-deep oil and gas extraction is required and the power of one power unit 2 is insufficient, two power units 2 can be activated to operate simultaneously. Example 2

[0020] Based on Embodiment 1, this embodiment also includes a radiator, which is connected to the power unit, the paralleling box, and the fracturing pump via pipes. The radiator is used to dissipate heat from the power unit, the paralleling box, and the fracturing pump.

[0021] To achieve a compact overall structure, the radiator 1, power unit 2, clutch 3, paralleling box 4, drive shaft 5, fracturing pump 6, and manifold system 7 are all located inside the skid 8 and connected to the skid 8 by fasteners.

[0022] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A dual-machine single-pump fracturing skid, characterized in that, The system includes a skid, which houses multiple power units capable of operating independently or in combination. Each power unit is connected to a paralleling box via a clutch. The paralleling box is connected to the input end of a fracturing pump via a drive shaft. The output end of the fracturing pump is connected to one end of a manifold system, and the other end of the manifold system is connected to the wellhead.

2. The dual-machine single-pump fracturing skid according to claim 1, characterized in that, The power unit includes an engine and a gearbox, with the output end of the engine connected to the input end of the gearbox and the output end of the gearbox connected to the input end of the clutch.

3. The dual-machine single-pump fracturing skid according to claim 1, characterized in that, The parallel transport box is provided with multiple input terminals, which correspond to the number of power units and are connected to the output terminals of the corresponding clutches.

4. The dual-machine single-pump fracturing skid according to claim 3, characterized in that, The parallel transport box is provided with an output end, which is connected to the input end of the fracturing pump via a drive shaft.

5. The dual-machine single-pump fracturing skid according to claim 3, characterized in that, The number of power units is 2.

6. The dual-machine single-pump fracturing skid according to claim 5, characterized in that, The two power units are arranged side by side along the width of the skid.

7. The dual-machine single-pump fracturing skid according to claim 1, characterized in that, It also includes a radiator, which is connected to the power unit, the paralleling box, and the fracturing pump via pipes. The radiator is used to dissipate heat from the power unit, the paralleling box, and the fracturing pump.

8. The dual-machine single-pump fracturing skid according to claim 7, characterized in that, The radiator, power unit, clutch, parallel transport box, drive shaft, fracturing pump, and manifold system are all located inside the skid and connected to the skid by fasteners.

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