A multifunctional equipment integrating sand mixing and fracturing functions

Abstract

The present invention discloses a multifunctional device integrating sand mixing and fracturing functions, including a sand mixing part and a fracturing part, and also including a discharge manifold, wherein the discharge manifold includes a sand mixing output pipeline for conveying the output material of the sand mixing part to the outside and an intermediate output pipeline for conveying the output material of the sand mixing part to the fracturing part; the discharge manifold also includes a second valve installed on the sand mixing output pipeline and a third valve installed on the intermediate output pipeline. The present invention realizes the combined application of sand mixing and fracturing and their respective independent applications, and can also meet the use requirements of liquid buffer stirring such as acid mixing, and has the advantages of flexible matching and wide application range.

Description

Technical Field

[0001] The invention relates to a device integrating sand mixing and fracturing functions. Background Art

[0002] In the field of oilfield equipment, complete sets of fracturing equipment account for a large proportion. Usually, fracturing construction will be equipped with varying numbers of fracturing and sand mixing equipment according to the needs of the construction operation. With the continuous development and optimization of on-site construction technology, some new requirements have been put forward for supporting equipment, such as small-displacement fracturing, continuous tubing sandblasting and perforating operations, small-scale acid fracturing, pumped bridge plugs, drilled bridge plugs, etc.

[0003] At present, there is no perfect solution for these new on-site requirements. If the equipment is configured according to conventional ideas, customers need to match fracturing equipment, sand mixing equipment, acid fracturing equipment, etc., and the construction needs to combine equipment according to different needs. However, the parameters of conventional equipment do not match, and a lot of new equipment needs to be invested, and the on-site placement and equipment connection are cumbersome. However, this type of operation is relatively rare, and investing a large amount of equipment will also lead to low equipment utilization.

[0004] In order to solve the above problems, a combined special device is proposed in the prior art:

[0005] (1) The Chinese utility model patent "A Fracturing Sand Mixer" with announcement number CN208347762U discloses a fracturing sand mixer, which is more in line with the demand. However, the improvement is not thorough. It simply arranges the fracturing and sand mixing function modules in series, which cannot achieve the separate use of sand mixing and fracturing, and cannot achieve the operation requirements of drilling and grinding bridge plugs, pumping bridge plugs, etc., and the application scope of the equipment is limited. At the same time, the equipment is not equipped with the acid mixing buffer device required for acid fracturing, and cannot achieve acid fracturing operations.

[0006] (2) The device provided by the Chinese invention patent "An integrated sand-adding and mixing booster pump truck" with publication number CN106089159A is similar to the device in the above patent and has the same problem. Moreover, its power system solution is that the engine drives the transfer case, and the transfer case drives the booster. The disadvantage of this solution is that the transfer case has no gear shifting and speed regulation function, and the displacement adjustment of the booster can only be achieved by changing the engine speed. Limited by the characteristics of the engine, its adjustment range is small and cannot cover the operating requirements of different displacements, and its application is extremely limited. Summary of the invention

[0007] The present invention proposes a multifunctional equipment integrating sand mixing and fracturing functions, the purposes of which are: (1) to realize the combined application of sand mixing and fracturing as well as their respective independent applications; (2) to meet the use requirements of liquid buffer stirring such as acid mixing; and (3) to widen the speed adjustment range.

[0008] The technical solution of the present invention is as follows:

[0009] A multifunctional equipment integrating sand mixing and fracturing functions, comprising a sand mixing part and a fracturing part, and also comprising a discharge manifold, wherein the discharge manifold comprises a sand mixing output pipeline for conveying the output material of the sand mixing part to the outside and an intermediate output pipeline for conveying the output material of the sand mixing part to the fracturing part;

[0010] The discharge manifold further comprises a second valve installed on the sand mixing output pipeline and a third valve installed on the intermediate output pipeline.

[0011] As a further improvement of the equipment: the sand mixing part includes a mixing tank and a discharge pump for pumping the material in the mixing tank to the discharge manifold;

[0012] The multifunctional device further comprises a fifth valve, a sixth valve and an external interface;

[0013] The fifth valve is installed on the connecting pipeline between the first input port of the discharge pump and the output port of the mixing tank;

[0014] The sixth valve is installed on the connecting pipeline between the external interface and the second input port of the discharge pump.

[0015] As a further improvement of the equipment: the sand mixing part further comprises a suction port and a suction pump for conveying the liquid sucked in by the suction port to the sand mixing part;

[0016] The multifunctional device further comprises a ninth valve, which is installed on the connecting pipeline between the output port of the suction pump and the liquid inlet of the fracturing part.

[0017] As a further improvement of the equipment: it also includes a stirring tank, which is used for buffering and stirring the liquid, and the output port of the stirring tank is connected to the liquid inlet of the fracturing part through a pipeline.

[0018] As a further improvement of the equipment: the sand mixing part further comprises a suction port and a suction pump for conveying the liquid sucked in by the suction port to the sand mixing part; the output port of the suction pump is connected to the liquid inlet of the mixing tank through a second pipeline, and a seventh valve is installed on the pipeline;

[0019] Alternatively, the liquid inlet of the stirring tank is connected to an input pump.

[0020] As a further improvement of the equipment: the output port of the mixing tank is connected to the liquid inlet of the fracturing part through a pipeline, which means:

[0021] The sand mixing part includes a mixing tank and a discharge pump for pumping the material in the mixing tank to the discharge manifold; the output port of the mixing tank is connected to the input port of the discharge pump through a first mixing and conveying pipeline, and an eighth valve is provided on the first mixing and conveying pipeline;

[0022] Alternatively, the output port of the stirring tank is directly connected to the liquid inlet of the fracturing part through a second stirring and conveying pipeline.

[0023] As a further improvement of the device: it also includes a power system; the power system is electric drive or fuel type;

[0024] The power system includes a power module that provides power to both the fracturing part and the sand mixing part; or, the power system includes a first power module that provides power to the fracturing part and a second power module that provides power to the sand mixing part.

[0025] As a further improvement of the present device, it also includes a gearbox, which is connected between the power system and the fracturing part.

[0026] As a further improvement of the present equipment: the multifunctional equipment further comprises a carrying device, the sand mixing part and the fracturing part are mounted on the carrying device, and the power device on the carrying device serves as the first power module.

[0027] As a further improvement of the equipment: the fracturing part comprises more than two fracturing pumps arranged in parallel, and control valves are respectively arranged on the branches where the fracturing pumps are located.

[0028] As a further improvement of the device: it also includes at least one of a first dry powder adding device and a first liquid additive adding device;

[0029] The first dry powder adding device is used to inject dry powder into the mixing tank;

[0030] The first liquid additive adding device is used to inject liquid additives into the mixing tank.

[0031] As a further improvement of the device: it also includes at least one of a second dry powder adding device and a second liquid additive adding device;

[0032] The second dry powder adding device is used to inject dry powder into the mixing tank;

[0033] The second liquid additive adding device is used to inject liquid additives into the stirring tank.

[0034] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention sets different valves on the pipeline to control the on-off of the pipeline, thereby realizing the combined application and independent application of sand mixing and fracturing functions, making the equipment multi-purpose, expanding the application capacity of the equipment, and improving the utilization rate of the equipment; (2) A separate external pipeline is set for the fracturing part, and the fracturing pump can supply liquid through the suction pump or the discharge pump. The realization of the fracturing function does not require additional external booster supply device, and can directly suck liquid from facilities such as storage tanks, which is convenient for on-site use; (3) A stirring tank is equipped. When on-site operations require pumping acid or other liquids that need to be buffered and stirred on the equipment, the liquid can be injected into the stirring tank through the suction pump for buffering and stirring, and then the liquid is supplied to the fracturing pump through the discharge pump, thereby the equipment The application field is further broadened to meet the operational needs of buffering and stirring liquids; (4) The power system is flexibly equipped according to the power situation of the carrier. When the engine of the carrier is used to directly drive the fracturing pump and the engine on the platform is used to drive other components, or the engine on the platform is used to drive the fracturing pump and the engine of the carrier is used to drive the sand mixing part and other components, the chassis resources can be fully utilized, the power of the engine on the platform is greatly reduced, and the cost of the equipment is further reduced; (5) When two or more groups of fracturing pumps are arranged in parallel, the sand mixing system can supply liquid to one of the groups, or it can supply liquid to two groups of fracturing pumps at the same time, which significantly improves the operating efficiency; (6) The power system drives the fracturing pump to work through the gearbox. The displacement of the booster can be changed by adjusting the gearbox, which is convenient for covering the operational needs of different displacements. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is one of the structural diagrams of Embodiment 1;

[0036] Figure 2 This is the second structural diagram of the first embodiment;

[0037] Figure 3 This is a pipeline schematic diagram of Embodiment 1;

[0038] Figure 4 This is a pipeline schematic diagram of Embodiment 2;

[0039] Figure 5 This is a pipeline schematic diagram of embodiment 3;

[0040] Figure 6 This is a pipeline schematic diagram of Embodiment 5;

[0041] Figure 7 This is a schematic diagram of the structure of the sixth embodiment, which does not include the carrying device part. DETAILED DESCRIPTION

[0042] The technical solution of the present invention is described in detail below with reference to the accompanying drawings: Embodiment 1

[0043] like Figure 1 and 2 A multifunctional equipment integrating sand mixing and fracturing functions includes: a power system 1, a gearbox 2, a transmission shaft 3, a fracturing part, a sand mixing part, a bearing device 10 and a hydraulic system 12.

[0044] The fracturing part includes a fracturing pump 5. The sand mixing part includes a suction manifold 4, a mixing tank 7, a discharge manifold 9, a suction pump 13, a sand conveying device 6 for conveying external proppant to the mixing tank 7, and a discharge pump 8 for pumping the material in the mixing tank 7 to the discharge manifold 9.

[0045] like Figure 3 The suction manifold 4 includes a first pipeline 29 connecting the suction port 14 and the mixing tank 7 , and a suction pump 13 and a first valve 15 are provided on the first pipeline 29 .

[0046] The discharge manifold 9 includes a sand mixing output pipeline 27 for transporting the output material of the sand mixing part to the discharge port 17 and an intermediate output pipeline 28 for transporting the output material of the sand mixing part to the fracturing part.

[0047] The discharge manifold 9 further includes a second valve 16 installed on the sand mixing output pipeline 27 and a third valve 18 installed on the intermediate output pipeline 28 .

[0048] It also includes a fracturing input pipeline for supplying fluid to the fracturing pump 5 and a fourth valve 19 installed on the fracturing input pipeline.

[0049] During operation, external liquid enters through the suction port 14, enters the mixing tank 7 through the suction pump 13 and the first valve 15, and at the same time, the external proppant is injected into the mixing tank 7 through the sand conveying device 6. The material in the mixing tank 7 is then discharged through the discharge pump 8. When the third valve 18 is opened and the second valve 16 is closed, the liquid is injected into the fracturing pump 5, and the material processed by the fracturing pump 5 is output from the discharge port and transported to the downstream equipment through the high-pressure manifold. When the second valve 16 is opened and the third valve 18 is closed, the liquid is injected into the external equipment through the discharge port 17.

[0050] In this embodiment, the carrying device 10 is a vehicle chassis, and may also be a semi-trailer, a skid, etc. The sand mixing part and the fracturing part are installed on the carrying device 10 .

[0051] In terms of power, the engine of the vehicle chassis can be used to power the fracturing pump 5 and the sand mixing part, or the engine of the vehicle chassis can be used to power the fracturing pump 5 alone, and then a separate on-stage engine can be configured to power the sand mixing part, etc., or the on-stage engine can be used to drive the fracturing pump 5, and the engine of the vehicle chassis can be used to drive the sand mixing part and other components.

[0052] Furthermore, a motor can be used as a power device to provide power. Similarly, the power can be provided uniformly or separately.

[0053] Furthermore, when the fracturing pump 5 and the sand mixing part use different power devices, the two sets of power devices can be electric-driven and fuel-driven respectively, and can be flexibly matched according to actual conditions.

[0054] In this embodiment, the power device is connected to the fracturing pump 5 via the gearbox 2 and the transmission shaft 3, thereby achieving variable speed control and long-distance transmission of power.

[0055] Furthermore, the device also includes a radiator equipped for a power device such as an engine, and the radiator can be arranged vertically or horizontally.

[0056] The device can further integrate a first dry powder adding device and a first liquid additive adding device. The first dry powder adding device can be arranged above the mixing tank 7 to add dry powder directly into the mixing tank 7. The first liquid additive adding device is arranged at the bottom of the device, and liquid additives are sucked from the outside through the inlet of the liquid adding pump, and the outlet of the liquid adding pump transports the liquid additives to the mixing tank 7 through the manifold system. Furthermore, a third liquid additive adding device is included, which is used to inject liquid additives into the discharge manifold 9; and a fourth liquid additive adding device is included, which is used to inject liquid additives into the suction manifold 4.

[0057] The number of the adding devices is not limited, and can be one or more. Embodiment 2

[0058] like Figure 4 The difference between this embodiment and the first embodiment is that the multifunctional device further includes a fifth valve 20 , a sixth valve 21 and an external interface 22 .

[0059] The fifth valve 20 is installed on the connecting pipeline between the first input port of the discharge pump 8 and the output port of the mixing tank 7 ; the sixth valve 21 is installed on the connecting pipeline between the external interface 22 and the second input port of the discharge pump 8 .

[0060] The advantage of this embodiment is that its external liquid supply can be pressurized by the discharge pump 8 to ensure that the liquid supply pressure of the fracturing pump 5 can meet the requirements. There is no need to equip the device with a pressurized liquid supply device, and the liquid can be directly sucked from the storage tank and other facilities. Embodiment 3

[0061] like Figure 5 The difference between this embodiment and the first embodiment is that:

[0062] The multifunctional device further comprises a ninth valve 23, which is installed on the connecting pipeline between the output port of the suction pump 13 and the liquid inlet of the fracturing part.

[0063] The advantage of this embodiment is that its external liquid supply can be pressurized by the suction pump 13 to ensure that the liquid supply pressure of the fracturing pump 5 can meet the requirements. There is no need to equip the device with a pressurized liquid supply device, and the liquid can be directly sucked from the storage tank and other facilities. Embodiment 4

[0064] This embodiment combines the second embodiment with the third embodiment to realize the function that both the suction pump 13 and the discharge pump 8 can inject liquid into the fracturing pump 5. Its advantage is that the placement of the on-site equipment is not affected by space limitations, and no matter which side of the equipment the external liquid supply device is on, it can be conveniently connected to the pipeline to supply liquid to the fracturing pump 5. And when one of the suction pump 13 or the discharge pump 8 fails, the other pump can be used to supply liquid, so that one is used and the other is used as a backup. Embodiment 5

[0065] like Figure 6 In this embodiment, a stirring tank 25 is added on the basis of the above embodiment. The stirring tank 25 is used for buffering and stirring the liquid. The output port of the stirring tank 25 is connected to the liquid inlet of the fracturing part through a pipeline.

[0066] The output port of the suction pump 13 is connected to the liquid inlet of the stirring tank 25 through a second pipeline 30, and a seventh valve 24 is installed on the second pipeline 30; at the same time, the output port of the stirring tank 25 is connected to the input port of the discharge pump 8 through a first stirring and conveying pipeline, and an eighth valve 26 is provided on the first stirring and conveying pipeline.

[0067] When field operations require the pumping of acid or other liquids that require buffering and stirring on the equipment, the liquid can be injected into the mixing tank 25 through the suction pump 13 and the seventh valve 24 for buffering and stirring, and then the liquid can be supplied to the fracturing pump 5 through the eighth valve 26 and the discharge pump 8.

[0068] As another input method of the stirring tank 25, the liquid inlet of the stirring tank 25 is connected to an input pump, and the liquid is directly input by the input pump.

[0069] As another output mode of the stirring tank 25 , the output port of the stirring tank 25 is directly connected to the liquid inlet of the fracturing pump 5 through the discharge pump 8 .

[0070] A second dry powder adding device and a second liquid additive adding device may be further integrated into the stirring tank 25. The second dry powder adding device may be arranged above the stirring tank 25 to add the dry powder directly into the stirring tank 25. The second liquid additive adding device is arranged at the bottom of the device to suck in liquid additives from the outside through the inlet of the liquid adding pump, and the outlet of the liquid adding pump delivers the liquid additives to the stirring tank 25 through the manifold system. Embodiment 6

[0071] like Figure 7 The fracturing part includes more than two fracturing pumps 5 arranged in parallel, and each branch where the fracturing pump 5 is located is respectively provided with a control valve.

[0072] Specifically, two parallel branch pipelines are designed in the rear end manifold of the discharge pump 8 of the sand mixing part, and the two branches are respectively connected to the two sets of fracturing pumps 5, and a control valve is set on each branch. During operation, the valve is switched on and off as needed to realize the supply of liquid to one set of fracturing pumps 5 alone or to two sets at the same time.

Claims

1. A multifunctional equipment integrating sand mixing and fracturing functions, comprising a sand mixing part and a fracturing part, characterized in that: It also includes a discharge manifold (9), wherein the discharge manifold (9) includes a sand mixing output pipeline (27) for transporting the output material of the sand mixing part to the outside and an intermediate output pipeline (28) for transporting the output material of the sand mixing part to the fracturing part; The discharge manifold (9) further comprises a second valve (16) installed on the sand mixing output pipeline (27) and a third valve (18) installed on the intermediate output pipeline (28); The sand mixing part comprises a mixing tank (7) and a discharge pump (8) for pumping the material in the mixing tank (7) to a discharge manifold (9); The multifunctional device further comprises a fifth valve (20), a sixth valve (21) and an external interface (22); The fifth valve (20) is installed on the connecting pipeline between the first input port of the discharge pump (8) and the output port of the mixing tank (7); The sixth valve (21) is installed on the connecting pipeline between the external interface (22) and the second input port of the discharge pump (8); It also includes a stirring tank (25), the stirring tank (25) is used for buffering and stirring the liquid, the output port of the stirring tank (25) is connected to the liquid inlet of the fracturing part through a pipeline: the output port of the stirring tank (25) is connected to the second input port of the discharge pump (8) through a first stirring and conveying pipeline, and an eighth valve (26) is provided on the first stirring and conveying pipeline; The sand mixing part further comprises a suction port (14) and a suction pump (13) for conveying the liquid sucked in by the suction port (14) to the sand mixing part; the output port of the suction pump (13) is connected to the liquid inlet of the mixing tank (25) via a second pipeline (30), and a seventh valve (24) is installed on the pipeline; It also includes a ninth valve (23), which is installed on the connecting pipeline between the output port of the suction pump (13) and the liquid inlet of the fracturing part; It also includes a first valve (15) arranged between the output port of the suction pump (13) and the mixing tank (7).

2. The multifunctional equipment integrating sand mixing and fracturing functions as claimed in claim 1, characterized in that: It also includes a power system (1); the power system (1) is electrically driven or fuel-driven; The power system (1) comprises a power module that provides power to both the fracturing part and the sand mixing part; or, the power system (1) comprises a first power module that provides power to the fracturing part and a second power module that provides power to the sand mixing part.

3. The multifunctional equipment integrating sand mixing and fracturing functions as claimed in claim 2, characterized in that: It also includes a gearbox (2), which is connected between the power system (1) and the fracturing part.

4. The multifunctional equipment integrating sand mixing and fracturing functions as claimed in claim 2, characterized in that: The multifunctional equipment further comprises a carrying device (10), the sand mixing part and the fracturing part are mounted on the carrying device (10), and the power device on the carrying device (10) serves as the first power module.

5. The multifunctional equipment integrating sand mixing and fracturing functions as claimed in claim 2, characterized in that: The fracturing part comprises more than two fracturing pumps (5) arranged in parallel, and each branch where the fracturing pump (5) is located is provided with a control valve.

6. The multifunctional equipment integrating sand mixing and fracturing functions as claimed in claim 1, characterized in that: Also includes at least one of a first dry powder adding device and a first liquid additive adding device; The first dry powder adding device is used to inject dry powder into the mixing tank (7); The first liquid additive adding device is used to inject liquid additives into the mixing tank (7).

7. The multifunctional equipment integrating sand mixing and fracturing functions as claimed in claim 1, characterized in that: Also includes at least one of a second dry powder adding device and a second liquid additive adding device; The second dry powder adding device is used to inject dry powder into the mixing tank (25); The second liquid additive adding device is used to inject liquid additives into the stirring tank (25).

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