Wellhead injection device for integrated variable viscosity slickwater fracturing fluid

Abstract

The utility model discloses an integrated wellhead injection device of slick water fracturing fluid of variable viscosity, including agitator, make -up barrel and fixed platform, be equipped with slide on make -up barrel lateral wall, the slide with the slide groove slidingly connected of agitator lateral wall is equipped with universal wheel after fixed platform and is penetrated in the bottom of make -up barrel, and the top of make -up barrel is equipped with the flow guide pump, and the output of flow guide pump is equipped with the hose, and the hose is detachably connected with the make -up port of agitator upper portion lateral wall equipment. The utility model through the loading multiple make -up barrels around the main agitator, thereby can add the resistance reducing agent, the anti -swelling agent or the auxiliary material such as cleanup agent to the agitator, thereby realizes the viscosity quick regulation of the slick water fracturing fluid in the agitator, and the operation is convenient, after using, can realize the portable mobile function of the device whole through the lifting make -up barrel, thereby can complete the fracturing construction work of multiple wellheads quickly, and the practicality is strong, is favorable for the oilfield popularization and use.

Description

Technical Field

[0001] This utility model relates to the field of fracturing technology, specifically to an integrated wellhead injection device for variable viscosity slickwater fracturing fluid. Background Technology

[0002] Fracturing fluid is a heterogeneous and unstable chemical system formed by a variety of additives in a certain proportion. It is a working fluid used to fracture oil and gas reservoirs. Its main function is to transfer the high pressure generated by the surface equipment to the formation, causing the formation to fracture and transport proppant along the fracture.

[0003] To address the challenges of increasing production and achieving profitable development in tight oil reservoirs, improvements to fracturing processes and fracturing fluid formulations can be beneficial. Among these, slickwater fracturing fluids, compared to guar gum systems, are currently the preferred choice for use and research in tight oil reservoirs due to their lower pump pressure and easier viscosity adjustment.

[0004] Depending on the specific fracturing process requirements on-site, the viscosity requirements for fracturing fluid also vary. Low-viscosity slickwater can increase formation permeability, open microfractures, carry proppant, and store energy; medium-viscosity slickwater can increase the proppant ratio and improve proppant loading intensity; high-viscosity slickwater can achieve cross-layer penetration and improve vertical propagation.

[0005] However, in current on-site construction, the viscosity requirements of fracturing fluid have not been considered. Usually, water is added and mixed in tank trucks and mixing tanks, and then the mixture is stored in a unified manner and added continuously. In this case, it is very difficult to control the viscosity of fracturing fluid if needed. Therefore, this needs to be improved and optimized. Utility Model Content

[0006] To address the aforementioned problems, this invention provides an integrated wellhead injection device for variable viscosity slickwater fracturing fluid.

[0007] The technical solution of this utility model is:

[0008] An integrated wellhead injection device for variable viscosity slickwater fracturing fluid includes a mixing tank, several feed tanks located around the mixing tank, and a fixed platform located at the bottom of the mixing tank.

[0009] The feeding tank is provided with a sliding rod on its side wall, and the sliding rod is slidably connected to the sliding groove provided on the side wall of the mixing tank;

[0010] The fixed platform is fixedly connected to the bottom of the mixing tank. The bottom of the fixed platform is provided with several hydraulic cylinders. The bottom of the feeding tank passes through the fixed platform and is provided with casters. The hydraulic cylinders and casters are arranged alternately.

[0011] A stirring motor is located at the center of the top of the mixing tank, and inlets are located on both sides of the top of the mixing tank. A flow guide pump is located at the top of the feeding tank, and a flexible hose is located at the output end of the flow guide pump. The flexible hose is detachably connected to the feeding port located on the upper side wall of the mixing tank.

[0012] Furthermore, the upper outer surface of the slide rod is provided with a first groove, the upper part of the slide groove is provided with a second groove, and the middle part of the slide groove is provided with a third groove. Both the second groove and the third groove extend to the side walls of the mixing tank on both sides. When the first groove moves to the docking point with the second groove or the third groove, a fixing block is detachably connected to fix the slide rod and the feeding tank.

[0013] Furthermore, the fixed block has limiting protrusions at both ends.

[0014] Furthermore, there are 3 sets of replenishment buckets, and correspondingly, there are 3 sets of sliding rods, sliding grooves, replenishment ports, flow pumps, hoses, and casters.

[0015] Furthermore, the end of the hose is provided with a connector, which is detachably connected to the feed port.

[0016] Furthermore, the bottom of the hydraulic cylinder is provided with a base plate.

[0017] Furthermore, the bottom of the replenishment bucket is provided with a connecting rod, the bottom of which is connected to the universal wheel, and the replenishment bucket and the connecting rod pass through a through hole provided on the fixed platform.

[0018] Furthermore, a stirring rod extending into the interior of the mixing tank is provided at the output end directly below the stirring motor.

[0019] The beneficial effects of this utility model are:

[0020] This utility model discloses an integrated wellhead injection device for variable viscosity slickwater fracturing fluid. By mounting multiple feed tanks around the main mixing tank, it is possible to quickly add auxiliary materials such as drag reducers, anti-swelling agents, or drainage aids into the mixing tank. This allows for rapid adjustment of the viscosity of the slickwater fracturing fluid inside the mixing tank. The device is easy to operate, and the entire unit can be moved by raising and lowering the feed tanks. This enables the rapid completion of fracturing operations at multiple wellheads. It is highly practical and conducive to its widespread use in oil fields. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an integrated variable viscosity slickwater fracturing fluid wellhead injection device according to this utility model.

[0022] Figure 2 This is a front view and internal structure schematic diagram of an integrated variable viscosity slickwater fracturing fluid wellhead injection device according to this utility model.

[0023] Figure 3 This is a side view of the feed tank and slide bar of an integrated variable viscosity slickwater fracturing fluid wellhead injection device according to this utility model.

[0024] Figure 4 This is a schematic diagram of the sliding rod and sliding groove connection structure of an integrated variable viscosity slickwater fracturing fluid wellhead injection device according to this utility model.

[0025] Figure 5 This is a schematic diagram of the fixed block structure of an integrated variable viscosity slickwater fracturing fluid wellhead injection device according to this utility model.

[0026] Among them, 1-mixing tank, 11-slide chute, 12-feed inlet, 13-replenishment inlet, 14-second slot, 15-third slot, 2-replenishment tank, 21-connecting rod, 3-fixed platform, 31-through hole, 4-slide rod, 41-first slot, 5-hydraulic cylinder, 51-base plate, 6-caster wheel, 7-mixing motor, 71-mixing rod, 8-guide pump, 81-hose, 82-connector, 9-fixing block, 91-limiting protrusion. Detailed Implementation

[0027] Example 1

[0028] like Figure 1 As shown, an integrated variable viscosity slickwater fracturing fluid wellhead injection device includes a mixing tank 1, three feed tanks 2 located around the mixing tank 1, and a fixed platform 3 located at the bottom of the mixing tank 1.

[0029] like Figures 3-5 As shown, a sliding rod 4 is provided on the side wall of the feeding bucket 2. The sliding rod 4 is slidably connected to the sliding groove 11 provided on the side wall of the mixing bucket 1. A first slot 41 is provided on the upper outer surface of the sliding rod 4. A second slot 14 is provided on the upper part of the sliding groove 11. A third slot 15 is provided in the middle of the sliding groove 11. Both the second slot 14 and the third slot 15 extend to the side walls of the mixing bucket 1 on both sides. When the first slot 41 moves to the docking point with the second slot 14 or the third slot 15, a fixing block 9 is detachably connected to fix the sliding rod 4 and the feeding bucket 2. The fixing block 9 has limiting protrusions 91 at both ends.

[0030] like Figure 1 and 2 As shown, the fixed platform 3 is fixedly connected to the bottom of the mixing tank 1. The bottom of the fixed platform 3 is provided with several hydraulic cylinders 5. The bottom of the feeding tank 2 passes through the fixed platform 3 and is provided with casters 6. The hydraulic cylinders 5 and casters 6 are arranged alternately. The bottom of the feeding tank 2 is provided with a connecting rod 21. The bottom of the connecting rod 21 is connected to the casters 6. The feeding tank 2 and the connecting rod 21 pass through the through hole 31 provided on the fixed platform 3.

[0031] like Figure 2 As shown, a stirring motor 7 is located at the center of the top of the mixing tank 1. A stirring rod 71 extending into the interior of the mixing tank 1 is located at the output end directly below the stirring motor 7. Feed inlets 12 are located on both sides of the top of the mixing tank 1. A guide pump 8 is located at the top of the feeding tank 2. A hose 81 is located at the output end of the guide pump 8. The hose 81 is detachably connected to the feeding port 13 located on the upper side wall of the mixing tank 1. A connector 82 is located at the end of the hose 81. The connector 82 is detachably connected to the feeding port 13. There are 3 sets of sliding rods 4, sliding grooves 11, feeding ports 13, guide pumps 8, hoses 81, and casters 6.

[0032] Example 2

[0033] The difference between this embodiment and embodiment 1 is that: four feeding buckets 2 are provided around the mixing bucket 1.

[0034] Working principle

[0035] The working principle of an integrated variable viscosity slickwater fracturing fluid wellhead injection device according to this utility model will be briefly explained below.

[0036] When in use, firstly, sand, 0.1% slippery water, and water are added into the mixing tank 1 through the feed inlet 12. At this time, the base plate 51 of the hydraulic cylinder 5 is fixed to the ground to keep the overall structure of the device stable. The feed bucket 2 and the connecting rod 21 rise, causing the slide rod 4 to move upward in the slide groove 11 until the first slot 41 is aligned with the second slot 14. The fixing block 9 is placed into the second slot 14 and is engaged with both sides of the first slot 41 by the limiting protrusion 91 to keep the feed bucket 2 stable.

[0037] Subsequently, the hose 81 and connector 82 are connected to the feed port 13, and the material inside the feed tank 2 is added to the mixing tank 1 through the flow pump 8. A certain amount of drag reducer, anti-swelling agent and discharge aid are added. The three feed tanks 2 are each added with three substances, each with an addition amount of 0.1%, to obtain low viscosity slippery water.

[0038] During fracturing, it may be necessary to adjust the viscosity of the fracturing fluid. For example, the formulation of medium-viscosity fracturing fluid is: 0.1%~0.3% drag reducer + 0.2~0.4% anti-swelling agent + 0.1~0.2% flow aid, and the formulation of high-viscosity fracturing fluid is: 0.4%~0.5% drag reducer + 0.3~0.5% anti-swelling agent + 0.2~0.4% flow aid. Then, the fluid can be supplemented by the above methods.

[0039] After the construction is completed, the entire device can be moved to the next well site for the next fracturing operation. At this time, the fixing block 9 is removed, the feed bucket 2 is lowered, the first slot 41 is aligned with the third slot 15, the fixing block 9 is placed into the third slot 15, and the limiting protrusion 91 is engaged with both sides of the first slot 41 to keep the feed bucket 2 stable. Then the base plate 51 of the hydraulic cylinder 5 rises to avoid contact with the ground, and the entire device can be moved by the three casters 6.

Claims

1. An integrated wellhead injection device for variable viscosity slickwater fracturing fluid, characterized in that, It includes a mixing tank (1), several feeding tanks (2) located around the mixing tank (1), and a fixed platform (3) located at the bottom of the mixing tank (1). The feeding bucket (2) is provided with a sliding rod (4) on its side wall, and the sliding rod (4) is slidably connected to the sliding groove (11) provided on the side wall of the mixing bucket (1); The fixed platform (3) is fixedly connected to the bottom of the mixing tank (1). The bottom of the fixed platform (3) is provided with several hydraulic cylinders (5). The bottom of the feeding tank (2) passes through the fixed platform (3) and is provided with casters (6). The hydraulic cylinders (5) and the casters (6) are arranged alternately. The mixing tank (1) is equipped with a mixing motor (7) at the top center, and the mixing tank (1) is equipped with feed inlets (12) on both sides of the top. The feed tank (2) is equipped with a flow guide pump (8) at the top, and the output end of the flow guide pump (8) is equipped with a hose (81). The hose (81) is detachably connected to the feed inlet (13) on the upper side wall of the mixing tank (1).

2. The wellhead injection device for an integrated variable viscosity slickwater fracturing fluid according to claim 1, characterized in that, The upper outer surface of the slide rod (4) is provided with a first slot (41), the upper part of the slide groove (11) is provided with a second slot (14), and the middle part of the slide groove (11) is provided with a third slot (15). The second slot (14) and the third slot (15) both extend to the side walls of the mixing tank (1) on both sides. When the first slot (41) moves to the docking point with the second slot (14) or the third slot (15), a fixing block (9) is detachably connected to fix the slide rod (4) and the feeding tank (2).

3. The wellhead injection device for an integrated variable viscosity slickwater fracturing fluid according to claim 2, characterized in that, The fixed block (9) has limiting protrusions (91) at both ends.

4. The wellhead injection device for an integrated variable viscosity slickwater fracturing fluid according to claim 1, characterized in that, There are 3 sets of feeding buckets (2), and correspondingly, there are 3 sets of sliding rods (4), sliding grooves (11), feeding ports (13), flow pumps (8), hoses (81), and casters (6).

5. The wellhead injection device for an integrated variable viscosity slickwater fracturing fluid according to claim 1, characterized in that, The hose (81) is provided with a connector (82) at its end, and the connector (82) is detachably connected to the feed port (13).

6. The wellhead injection device for an integrated variable viscosity slickwater fracturing fluid according to claim 1, characterized in that, The hydraulic cylinder (5) is provided with a base plate (51) at its bottom.

7. The wellhead injection device for an integrated variable viscosity slickwater fracturing fluid according to claim 1, characterized in that, The bottom of the replenishing bucket (2) is provided with a connecting rod (21), the bottom of the connecting rod (21) is connected to the universal wheel (6), and the replenishing bucket (2) and the connecting rod (21) pass through the through hole (31) provided on the fixed platform (3).

8. The wellhead injection device for an integrated variable viscosity slickwater fracturing fluid according to claim 1, characterized in that, The stirring motor (7) has a stirring rod (71) extending into the mixing tank (1) at its output end directly below it.

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