Skid-mounted fracturing fluid preparation device

Abstract

The utility model discloses a fracturing fluid skid-mounted liquid preparation device, which comprises a base and two groups of skid-mounted bases erected at the top of the base, a stirring tank and a pressure tank are respectively mounted at the tops of the two groups of skid-mounted bases in a skid-mounted manner, and a stirring component mounted in the stirring tank is driven to rotate by a stirring motor at the top. A scraping and sweeping assembly is further installed at the bottom of the stirring assembly, an extrusion assembly is installed in the pressure tank, a rotating shaft can be driven to rotate by starting a stirring motor, so that a stirring rod mixes and prepares internal pressure liquid, meanwhile, scraping blades at the bottom of the rotating shaft rotate along with the rotating shaft, and the bottom of the stirring tank can be scraped and brushed; the pressure liquid at the bottom of the stirring tank is prevented from being predicted due to high viscosity, the conveying pump can convey the pressure liquid into the pressure tank through the connecting pipe, the frequency of cleaning the pressure tank can be reduced, and the liquid mixing and preparing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas well engineering, in particular to a skid-mounted liquid distribution device for fracturing fluid. Background Art

[0002] Hydraulic fracturing is a measure for increasing the production of oil and gas wells with broad application prospects. Hydraulic fracturing is the main form of natural gas extraction at present. It uses a ground high-pressure pump to squeeze a fracturing fluid with a high viscosity into the oil layer through the wellbore. When the injection speed of the fracturing fluid exceeds the absorption capacity of the oil layer, a very high pressure is formed on the oil layer at the bottom of the well. When this pressure exceeds the fracture pressure of the oil layer rock near the bottom of the well, the oil layer will be squeezed open and cracks will be generated. At this time, the fracturing fluid is continuously squeezed into the oil layer, and the cracks will continue to expand into the oil layer. In order to keep the cracks opened in an open state, a sand-carrying fluid with a proppant (usually quartz sand) is then squeezed into the oil layer. After the sand-carrying fluid enters the crack, on the one hand, it can make the crack continue to extend forward, and on the other hand, it can support the cracks that have been opened so that they will not close. Then, a displacement fluid is injected to displace all the sand-carrying fluid in the wellbore into the cracks, and the cracks are propped up with quartz sand. Finally, the injected high-viscosity fracturing fluid will automatically degrade and be discharged from the wellbore, leaving one or more cracks of varying lengths, widths, and heights in the oil layer, establishing a new fluid channel between the oil layer and the wellbore. After fracturing, the production of oil and gas wells generally increases significantly.

[0003] Since the fracturing fluid used in hydraulic fracturing has a high viscosity, it is easy to adhere to the bottom of the mixing barrel during fluid preparation, causing siltation, affecting the delivery of the fracturing fluid, requiring frequent cleaning, resulting in low mixing efficiency. Utility Model Content

[0004] The utility model aims to provide a skid-mounted fracturing fluid dispensing device to solve the problem that the fracturing fluid has a high viscosity and is easily attached to the bottom of a mixing tank, causing siltation and requiring frequent cleaning to affect the mixing efficiency.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technology: a skid-mounted liquid distribution device for fracturing fluid, comprising a base and two groups of skid-mounted bases mounted on the top of the base, the tops of the two groups of skid-mounted bases are respectively skid-mounted with a stirring tank and a pressure tank, a delivery pump installed outside the stirring tank delivers liquid to the inside of the pressure tank through a connecting pipe, a stirring assembly installed inside the stirring tank is driven to rotate by a stirring motor on the top, a scraping assembly is also installed at the bottom of the stirring assembly, and an extrusion assembly is installed inside the pressure tank.

[0006] As a further description of the above-mentioned technology, a skid-mounted liquid dispensing device for fracturing fluid is as follows: the stirring assembly includes a rotating shaft, one end of the rotating shaft is connected to the output end of the stirring motor, a plurality of groups of stirring rods are distributed outside the rotating shaft, and a shaft sleeve is provided outside the rotating shaft under the stirring rod, and the shaft sleeve is positioned and fixed by three groups of positioning rods.

[0007] As a further description of a skid-mounted fracturing fluid dispensing device of the above technology: the scraping and sweeping assembly includes a scraping blade, and the scraping blade is fixed to an end of the rotating shaft away from the stirring motor.

[0008] As a further description of the above-mentioned technology, a skid-mounted fracturing fluid dispensing device is provided: a cleaning valve is installed at the bottom of the mixing tank.

[0009] As a further description of the above-mentioned technology, a skid-mounted liquid distribution device for fracturing fluid is as follows: the extrusion assembly includes a hydraulic pump, and the hydraulic pump is fixed to the top of the pressure tank by a plurality of groups of sealing bolts. The sealing bolts are integrally provided with a hydraulic telescopic column, and a sealing pressure plate is installed at the output end of the hydraulic telescopic column. The sealing pressure plate passes through the pressure tank, and the outer side edge of the sealing bolt is in contact with the inner wall of the pressure tank.

[0010] As a further description of the above-mentioned technology, a skid-mounted fracturing fluid dispensing device is provided: the skid-mounted base includes an inner ring frame welded to the bottom of the mixing tank and the pressure tank respectively, the outside of the inner ring frame is fixedly connected to the outer support frame by a connecting rod, and a support column is integrally provided at the bottom of the outer support frame.

[0011] As a further description of a skid-mounted fracturing fluid dispensing device of the above technology: a connecting threaded port is also provided at the bottom of the pressure tank, and a sealing valve is installed in the threaded seal inside the connecting threaded port.

[0012] In summary, due to the adoption of the above-mentioned technology, a skid-mounted fracturing fluid dispensing device, the beneficial effects of the utility model are:

[0013] 1. The utility model can drive the rotating shaft to rotate by starting the stirring motor, so that the stirring rod can mix the internal pressure liquid. At the same time, when the rotating shaft rotates, the scraper at the bottom of the rotating shaft also rotates, which can scrape the bottom of the stirring tank to avoid the pressure liquid at the bottom of the stirring tank from being viscous and causing leakage. It ensures that the delivery pump can deliver the pressure liquid to the pressure tank through the connecting pipe, reduces the number of times the pressure tank is cleaned, and improves the mixing efficiency.

[0014] 2. In the present new use, after the fracturing fluid is prepared, the hydraulic pump is started to drive the hydraulic telescopic column to move downward, so that the sealing pressure plate that fits the inner wall of the pressure tank moves downward to squeeze the fracturing fluid downward and enters the wellhead through the pipe connected to the external thread of the connecting screw port, completing the injection of the fracturing fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shows a stereogram provided according to an embodiment of the utility model;

[0016] Figure 2 A three-dimensional diagram of the internal structure of a mixing box provided according to an embodiment of the utility model is shown;

[0017] Figure 3 A three-dimensional diagram of the structure of the hydraulic pump connection part provided according to an embodiment of the utility model is shown;

[0018] Figure 4 A bottom-view structural stereogram of a pressure tank provided according to an embodiment of the utility model is shown.

[0019] Legend: 1. Base; 2. Skid-mounted base; 21. Inner ring frame; 22. Connector column; 23. Outer support frame; 24. Support column; 3. Mixing tank; 31. Mixing motor; 32. Rotating shaft; 33. Mixing rod; 34. Bushing; 35. Positioning rod; 36. Scraper; 37. Cleaning valve; 4. Pressure tank; 41. Hydraulic pump; 42. Hydraulic telescopic column; 43. Sealing pressure plate; 44. Sealing bolt; 45. Connecting thread; 5. Connecting pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technology of a skid-mounted liquid dispensing device for fracturing fluid in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 4As shown, the utility model provides a technical solution: a skid-mounted liquid dispensing device for fracturing fluid, comprising a base 1 and two groups of skid-mounted bases 2 mounted on the top of the base 1, a stirring tank 3 and a pressure tank 4 are skid-mounted on the top of the two groups of skid-mounted bases 2, respectively. The skid-mounted base 2 comprises an inner ring frame 21 welded to the bottom of the stirring tank 3 and the pressure tank 4, respectively, the skid-mounted base 2 is installed at the bottom of the stirring tank 3 and the pressure tank 4, so as to facilitate the skid-mounted lifting of the pressure tank 4 and the stirring tank 3, the outer side of the inner ring frame 21 is fixedly connected to the outer support frame 23 through a connecting rod 22, a support column 24 is integrally provided at the bottom of the outer support frame 23, and the outer support frame 23 can provide a more stable supporting effect by cooperating with the inner ring frame 21 through the connecting rod 22, a delivery pump installed on the outside of the stirring tank 3 delivers liquid to the inside of the pressure tank 4 through a connecting pipe 5, a stirring assembly installed inside the stirring tank 3 is driven to rotate by a stirring motor 31 at the top, a scraping assembly is also installed at the bottom of the stirring assembly, the scraping assembly can scrape and brush the bottom of the stirring tank 3 to avoid silting at the bottom of the stirring tank 3, and an extrusion assembly is installed inside the pressure tank 4.

[0022] For details, please refer to Figure 1-Figure 3 As shown, the stirring assembly includes a rotating shaft 32, one end of which is connected to the output end of the stirring motor 31, a plurality of groups of stirring rods 33 are distributed outside the rotating shaft 32, and a sleeve 34 is sleeved on the outside of the rotating shaft 32 below the stirring rod 33, the sleeve 34 is positioned and fixed by three groups of positioning rods 35, and the sleeve 34 cooperates with the positioning rods 35 to ensure the stability of the bottom of the rotating shaft 32 when it rotates, and the scraping assembly includes a scraper 36, which is fixed at one end of the rotating shaft 32 away from the stirring motor 31, and a cleaning valve 37 is installed at the bottom of the stirring tank 3, and the cleaning valve 37 can clean the inside of the stirring tank 3 after processing.

[0023] In this embodiment, by starting the stirring motor 31, the rotating shaft 32 can be driven to rotate, so that the stirring rod 33 mixes the internal fracturing fluid. At the same time, when the rotating shaft 32 rotates, the scraper 36 at the bottom of the rotating shaft 32 also rotates, and the bottom of the stirring tank 3 can be scraped to avoid the fracturing fluid at the bottom of the stirring tank 3 from silting due to its high viscosity, thereby ensuring that the delivery pump can deliver the fracturing fluid to the pressure tank 4 through the connecting pipe 5.

[0024] For details, please refer to Figure 3-Figure 4 As shown, the extrusion assembly includes a hydraulic pump 41, which is fixed to the top of the pressure tank 4 by a plurality of sealing bolts 44. The sealing bolts 44 are integrally provided with a hydraulic telescopic column 42. A sealing pressure plate 43 is installed at the output end of the hydraulic telescopic column 42. The sealing pressure plate 43 runs through the pressure tank 4, and the outer side edge of the sealing bolt 44 is in contact with the inner wall of the pressure tank 4. A connecting screw 45 is also provided at the bottom of the pressure tank 4, and a sealing valve 46 is installed in the inner thread of the connecting screw 45.

[0025] In this embodiment, after the fracturing fluid is prepared, the hydraulic pump 41 is started to drive the hydraulic telescopic column 42 to move downward, so that the sealing pressure plate 43 that fits the inner wall of the pressure tank 4 moves downward to squeeze the fracturing fluid downward and enters the wellhead through the pipe connected to the external thread of the connecting screw 45, completing the injection of the fracturing fluid.

[0026] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, according to the technical concept of the utility model of a fracturing fluid skid-mounted liquid distribution device and its utility model, shall be equivalently replaced or changed, and shall be covered by the protection scope of the utility model.

Claims

1. A skid-mounted liquid dispensing device for fracturing fluid, comprising a base (1) and two sets of skid-mounted bases (2) mounted on the top of the base (1), wherein a stirring tank (3) and a pressure tank (4) are skid-mounted on the top of the two sets of skid-mounted bases (2), respectively, and a delivery pump installed outside the stirring tank (3) delivers liquid to the inside of the pressure tank (4) through a connecting pipe (5), characterized in that: The stirring assembly installed inside the stirring tank (3) is driven to rotate by a stirring motor (31) at the top, and a scraping assembly is also installed at the bottom of the stirring assembly. The pressure tank (4) is installed inside an extrusion assembly.

2. A skid-mounted fracturing fluid dispensing device according to claim 1, characterized in that: The stirring assembly comprises a rotating shaft (32), one end of the rotating shaft (32) is connected to the output end of the stirring motor (31), a plurality of groups of stirring rods (33) are distributed outside the rotating shaft (32), and a shaft sleeve (34) is sleeved outside the rotating shaft (32) and located below the stirring rods (33), and the shaft sleeve (34) is positioned and fixed by three groups of positioning rods (35).

3. A skid-mounted fracturing fluid dispensing device according to claim 2, characterized in that: The scraping and sweeping assembly comprises a scraping blade (36), and the scraping blade (36) is fixed to an end of the rotating shaft (32) away from the stirring motor (31).

4. The skid-mounted fracturing fluid dispensing device according to claim 1, characterized in that: A cleaning valve (37) is installed at the bottom of the stirring tank (3).

5. The skid-mounted fracturing fluid dispensing device according to claim 1, characterized in that: The extrusion assembly comprises a hydraulic pump (41), the hydraulic pump (41) being fixed to the top of the pressure tank (4) via a plurality of sets of sealing bolts (44), the sealing bolts (44) being integrally provided with a hydraulic telescopic column (42), the output end of the hydraulic telescopic column (42) being provided with a sealing pressure plate (43), the sealing pressure plate (43) penetrating the pressure tank (4), and the outer side edge of the sealing bolt (44) being in contact with the inner wall of the pressure tank (4).

6. A skid-mounted fracturing fluid dispensing device according to claim 5, characterized in that: The skid-mounted base (2) comprises an inner ring frame (21) respectively welded to the bottom of the mixing tank (3) and the pressure tank (4); the outer portion of the inner ring frame (21) is fixedly connected to an outer support frame (23) via a connecting rod (22); and a support column (24) is integrally provided at the bottom of the outer support frame (23).

7. The skid-mounted fracturing fluid dispensing device according to claim 1, characterized in that: The bottom of the pressure tank (4) is also provided with a connecting threaded port (45), and a sealing valve (46) is installed in a threaded sealing manner on the inner opening of the connecting threaded port (45).

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