A well kill fluid preparation dispersing device

Abstract

The utility model discloses a well killing fluid configuration dispersion device, including frame, be equipped with the stirring bin on the frame, be equipped with premixing subassembly between frame and stirring bin, and premixing subassembly includes 2 props of being equipped with on the frame, and the stirring bin is transversely arranged between two props, and the middle part outside wall of stirring bin is rotatably connected with two side props, and be equipped with the drive unit of driving stirring bin to middle part as center both ends upside -down of stirring bin, and the upper end of stirring bin is equipped with secondary mixing subassembly, including the mounting panel of being equipped with on the upper end of stirring bin, and be equipped with the liquid inlet and liquid outlet of liquid inlet pipe mouth with valve on the mounting panel, and be equipped with the pressure pump on the frame, and the input end of pressure pump is connected through quick -action valve with liquid outlet, and the output end of pressure pump is connected through quick -action valve with liquid inlet. The process combines overall turning over with local jet flow shearing, effectively prevents high density weighting agent settlement, significantly improves dispersion uniformity, and quick -action valve is convenient for on -the -spot quick assembly and disassembly.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction equipment technology. Background Technology

[0002] Well kill fluid is the core working fluid used in oil and gas well workover and kill operations to prevent blowouts. Its fluid column pressure needs to be slightly higher than the formation pressure to balance downhole pressure, prevent formation fluids from entering the wellbore, and ensure operational safety. To meet the requirements of different formation conditions, well kill fluids are typically formulated by blending various additives such as weighting agents, dispersants, viscosifiers, and filtration reducers with water-based or oil-based fluids, forming different types of systems such as water-based, oil-based, or gas-liquid mixtures. As oil extraction expands to deep wells, ultra-deep wells, and complex operating conditions, well kill fluids not only need adjustable density and good filtration performance, but also need to consider reservoir protection, high-temperature resistance, and salt resistance, placing higher demands on formulation processes and dispersion uniformity.

[0003] In the preparation of kill fluids, the efficient and uniform mixing and dispersion of various solid additives (such as weighting agents, dispersants, and filtration reducers) with the base fluid is a key factor determining the stability of the kill fluid's performance. Traditional preparation methods often involve centralized mixing at fixed mixing stations, followed by transportation to the well site by tanker trucks. This approach suffers from outdated technology, uneven dispersion, and high transportation costs.

[0004] When preparing fluids on-site, commonly used mechanical mixing devices require the installation of agitators and cables on the preparation tank, resulting in numerous pieces of equipment, a large amount of installation work, and significant noise at the well site. Traditional centralized mixing at preparation stations involves preparing the fluids in large mixing tanks or jet mixers, and then transporting them to the well site by tanker trucks. This not only faces problems such as high transportation costs and a lack of synchronization between preparation and operation, but also often causes the already uniformly dispersed high-density kill fluid to settle and stratify again over long distances, requiring re-mixing and homogenization upon arrival at the well site.

[0005] Temporary fluid preparation at the well site often employs simple mechanical stirring devices (such as immersion mixers or circulating pumps). These devices generally suffer from drawbacks such as high energy consumption, numerous mixing dead zones, and uncontrollable shear strength. Especially when dealing with kill fluids with high solid content or high density, ordinary impeller stirring cannot provide sufficient turbulence intensity, and a thick sediment layer easily forms at the bottom of the tank. This not only reduces the effective density but may also clog the pumping lines, directly affecting operational safety and efficiency. Utility Model Content

[0006] The purpose of this utility model is to provide a well control fluid preparation and dispersion device in order to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0008] A well-killing fluid preparation and dispersion device includes a frame, a mixing chamber on the frame, a premixing component between the frame and the mixing chamber, the premixing component including two supports on the frame, the mixing chamber being horizontally positioned between the two supports, the outer wall of the middle part of the mixing chamber being rotatably connected to the two side supports, a drive unit on the frame for driving the mixing chamber to tilt up and down around the middle, a secondary mixing component on the upper end of the mixing chamber, the secondary mixing component including a mounting plate on the upper end of the mixing chamber, an inlet and an outlet with valves on the mounting plate, the outlet extending into the bottom of the mixing chamber through a pipe, the inlet extending into the mixing chamber and having a mixing component at its end, a pressure pump on the frame, the input end of the pressure pump being connected to the outlet through a quick-connect valve, and the output end of the pressure pump being connected to the inlet through a quick-connect valve.

[0009] With the above scheme, during operation, the kill fluid raw material is first added to the mixing chamber, and the drive unit causes the chamber to tumble up and down, achieving macroscopic premixing of the materials; at the same time, the pressurization pump extracts the liquid from the bottom of the chamber and sprays it back at high speed through the inlet pipe and mixing component, forming a circulating jet. This process combines overall tumbling with local jet shearing, effectively preventing the sedimentation of high-density weighting agents, significantly improving dispersion uniformity, and the quick-connect valves facilitate rapid on-site assembly and disassembly.

[0010] Furthermore, the drive unit includes a gantry frame mounted on the frame, the gantry frame being in the same transverse direction as the mixing chamber, a rotating shaft being provided along the length direction on the gantry frame, push cams being provided at both ends of the rotating shaft, the two push cams being set in opposite directions, push plates being provided at both ends of the mixing chamber, the push plates being located within the movement trajectory of the protrusions of the push cams, and a reduction motor being provided in the middle of the rotating shaft, the output shaft of the reduction motor being connected to the rotating shaft.

[0011] In the above scheme, the geared motor drives the rotating shaft to rotate, and the push cams at both ends, due to their opposite directions, alternately push the push plates at both ends of the mixing chamber, causing the mixing chamber to move up and down alternately like a seesaw. This mechanism converts the rotational motion of the motor into the periodic oscillation of the mixing chamber, eliminating the need for complex linkages or hydraulic systems. It has a compact structure, low driving force, and the motion frequency can be flexibly adjusted by the motor speed to adapt to the mixing requirements of well control fluids with different viscosities.

[0012] Furthermore, a buffer spring assembly is provided between the push plate and the mixing chamber, and rolling bearings are distributed on the upper end of the push plate and the contact surface with the push cam, and rolling bearings are also distributed on the protrusion of the push cam.

[0013] With the above solution, when the cam pushes the pusher plate, the buffer spring assembly can absorb the impact energy and avoid rigid collisions; the rolling bearing converts sliding friction into rolling friction. This significantly reduces mechanical noise and wear, extends the life of the device, and makes the movement of the mixing chamber smoother and more stable, making it particularly suitable for well site environments with long-term continuous operation.

[0014] Furthermore, the frame is provided with a pad at the bottom of the mixing chamber, and the pad is sloping with one side higher than the other.

[0015] With the above scheme, when the mixing chamber is turned to its limit position, the pad blocks limit the excessive turning of the chamber and keep it at a fixed tilt angle. This tilting posture guides the material in the chamber to flow naturally to the lower side, causing the bottom sediment to collect towards the outlet pipe.

[0016] Furthermore, the output end of the pressurizing pump is equipped with a first electromagnetic three-way valve, the inlet pipe is connected to one end of the first electromagnetic three-way valve through a quick-connect valve, and the other end of the first electromagnetic three-way valve is connected to a discharge pipe. The input end of the pressurizing pump is equipped with a second electromagnetic three-way valve, the outlet pipe is connected to one end of the second electromagnetic three-way valve through a quick-connect valve, and the other end of the second electromagnetic three-way valve is connected to a feed pipe.

[0017] With the above scheme, by controlling the switching of two electromagnetic three-way valves, the device can freely switch between two modes: circulation mixing and feeding / discharging. In circulation mode, the pressurized pump forms a closed loop with the inlet and outlet pipes; in discharge mode, the prepared kill fluid is output through the discharge pipe; in feeding mode, new base fluid can be drawn in through the feed pipe. This design enables continuous operation of fluid preparation, circulation, and output without disassembling pipelines, greatly improving operational convenience and efficiency.

[0018] Furthermore, the mixing assembly includes a perforated plate connected to the liquid inlet, wherein the diameter of the holes on the perforated plate gradually decreases from one end of the liquid inlet to the outside, and the perforated plate has no less than three holes, and the perforated plate is connected to the end of the liquid inlet through a pipe.

[0019] Through the above scheme, as the liquid flows through the porous plate, the flow velocity gradually increases due to the progressively narrowing of the orifices, generating multiple high-speed jets and creating intense turbulence and shear zones between the plates. This progressively accelerating structure can effectively break up micron-sized particle agglomerates, making it particularly suitable for dispersing weighting agents such as barite in well control fluids with high solids content.

[0020] Furthermore, the sidewall of the mixing chamber is provided with a number of semi-circular convex spheres, which are made of high-strength stainless steel.

[0021] Through the above scheme, these convex spheres are equivalent to built-in passive turbulence elements, which can help break up agglomerates and prevent powder from adhering to the wall surface. At the same time, the semi-circular structure has no sharp edges, making it easy to clean and less prone to wear, thus enhancing the long-term reliability of the device.

[0022] Furthermore, the upper end of the mixing chamber is provided with a storage chamber, which stores cleaning balls. The bottom and top of the storage chamber are provided with hinged cover plates. The cover plate at the bottom of the storage chamber leads into the mixing chamber. Several armature plates are distributed on the surface of the cleaning balls. The frame is also provided with a long rod with a magnet at the end for picking up objects.

[0023] The above method involves opening the cover during cleaning, allowing the cleaning balls to fall into the mixing chamber. Under the influence of the chamber's agitation and liquid circulation, the cleaning balls repeatedly collide and rub against the chamber walls, effectively removing materials adhering to the inner walls. After cleaning, a long retrieval rod is used to attract the armature plates on the surface of the cleaning balls, allowing them to be removed and recycled one by one. This structure enables internal cleaning without opening the chamber, and is particularly suitable for cleaning high-viscosity or easily scaling well-killing fluids during production changes.

[0024] The beneficial effects of this utility model are as follows: 1. This utility model has a simple structure. Through the dual action of up-and-down tumbling and circulating jet, combined with the progressively accelerating shearing of the perforated plate and the convex ball-assisted turbulence, it achieves enhanced mixing throughout the entire process from macroscopic mixing to microscopic dispersion. This effectively suppresses the sedimentation and agglomeration of weighting agents in high-density kill fluids, significantly improving the uniformity of fluid preparation and operational safety. The device integrates modular functions such as electromagnetic three-way valve switching for inlet and outlet, quick-connect valve for rapid disassembly and assembly, and self-cleaning of the storage tank cleaning ball. It supports continuous circulating fluid preparation and output, and facilitates on-site maintenance and formula switching, greatly reducing the workload of well site equipment installation and the intensity of manual operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the mixing chamber in this application; Reference numerals: 11. Frame; 12. Mixing chamber; 13. Support platform; 14. Mounting plate; 15. Liquid inlet; 16. Liquid outlet; 21. Pressure pump; 22. Gantry frame; 23. Rotating shaft; 24. Push cam; 25. Push plate; 26. Gear motor; 27. Buffer spring assembly; 28. Rolling bearing; 29. ​​Pad; 30. First electromagnetic three-way valve; 31. Second electromagnetic three-way valve; 32. Discharge pipe; 33. Feed pipe; 34. Perforated plate; 36. Convex ball; 37. Storage bin; 38. Cleaning ball; 39. Armature plate; 40. Picking rod; 41. Cover plate. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] Example 1 like Figure 1 As shown, this embodiment provides a well control fluid preparation and dispersion device, including a frame 11, a mixing chamber 12 is provided on the frame 11, a premixing component is provided between the frame 11 and the mixing chamber 12, the premixing component includes two support platforms 13 provided on the frame 11, the mixing chamber 12 is horizontally placed between the two support platforms 13, the outer wall of the middle part of the mixing chamber 12 is rotatably connected to the two support platforms 13, a driving unit is provided on the frame 11 to drive the mixing chamber 12 to flip up and down at both ends with the middle part as the center, the driving unit includes a gantry frame 22 provided on the frame 11, the gantry frame 22 is in the same horizontal direction as the mixing chamber 12, a rotating shaft 23 is provided on the gantry frame 22 along the length direction, a push cam 24 is provided at both ends of the rotating shaft 23, the two push cams 24 are set in opposite directions, a push plate 25 is provided at both ends of the mixing chamber 12, the push plate 25 is located in the moving trajectory of the protrusion of the push cam 24, a reduction motor 26 is provided in the middle of the rotating shaft 23, and the output shaft of the reduction motor 26 is connected to the rotating shaft 23. A secondary mixing component is provided at the upper end of the mixing chamber 12. The secondary mixing component includes a mounting plate 14 located at the upper end of the mixing chamber 12. The mounting plate 14 is provided with an inlet pipe 15 and an outlet pipe 16 with valves. The outlet pipe 16 extends into the bottom end of the mixing chamber 12 through a pipe. The inlet pipe 15 extends into the mixing chamber 12 and is provided with a mixing component at its end. A pressure pump 21 is provided on the frame 11. The input end of the pressure pump 21 is connected to the outlet pipe 16 through a quick-connect valve. The output end of the pressure pump 21 is connected to the inlet pipe 15 through a quick-connect valve. All of the above connecting pipes are flexible hoses, which can be extended or folded for storage.

[0029] Therefore, during operation, the kill fluid raw material is first added to the mixing chamber 12. The drive unit causes the chamber to tumble up and down, and the geared motor 26 drives the rotating shaft 23 to rotate. The push cams 24 at both ends, due to their opposite directions, alternately push the push plates 25 at both ends of the mixing chamber 12, causing the mixing chamber 12 to move up and down alternately like a seesaw. This mechanism converts the rotational motion of the motor into the periodic oscillation of the mixing chamber 12. It does not require complex linkages or hydraulic systems, has a compact structure, low driving force, and the motion frequency can be flexibly adjusted by the motor speed to adapt to the mixing requirements of kill fluids with different viscosities, achieving macroscopic premixing of materials. At the same time, the pressurization pump 21 extracts the liquid from the bottom of the chamber and sprays it back at high speed through the inlet pipe 15 and the mixing component, forming a circulating jet. This process combines overall tumbling with local jet shearing, effectively preventing the sedimentation of high-density weighting agents, significantly improving dispersion uniformity, and the quick-connect valve facilitates rapid on-site disassembly and assembly.

[0030] Reference Figure 1 and Figure 2 To enhance the operational stability of the device, a buffer spring assembly 27 is installed between the push plate 25 and the mixing chamber 12. Rolling bearings 28 are distributed on the contact surface between the upper end of the push plate 25 and the push cam 24, and rolling bearings 28 are also distributed on the protrusion of the push cam 24. A pad 29 is installed at the bottom of the mixing chamber 12 on the frame 11. The pad 29 is sloping with one side higher than the other. When the cam pushes the push plate 25, the buffer spring assembly 27 can absorb the impact energy and avoid rigid collisions; the rolling bearings 28 convert sliding friction into rolling friction. This significantly reduces mechanical noise and wear, extends the life of the device, and makes the movement of the mixing chamber 12 more stable and smooth, especially suitable for well site environments with long-term continuous operation. When the mixing chamber 12 is tilted to its limit position, the pad 29 restricts the excessive tilting of the chamber and keeps it at a fixed tilt angle. This tilted posture guides the material in the chamber to flow naturally to the lower side, causing the bottom sediment to collect towards the outlet pipe 16.

[0031] Reference Figure 1 and Figure 2 The mixing assembly includes a perforated plate 34 connected to the inlet pipe 15. The diameter of the perforations on the perforated plate 34 gradually decreases from one end of the inlet pipe 15 outwards. There are at least three perforated plates 34. The perforated plates 34 are connected to the end of the inlet pipe 15 via pipes. When the liquid flows through the perforated plate 34, the flow velocity gradually increases due to the gradual contraction of the perforations, generating multiple high-speed jets and forming strong turbulence and shear zones between the plates. This gradually accelerating structure can effectively disperse micron-sized particle agglomerates, and is particularly suitable for dispersing weighting agents such as barite in well control fluids with high solids content.

[0032] Reference Figure 1 and Figure 2To improve the mixing effect, the side wall of the mixing chamber 12 is provided with a number of semi-circular convex balls 36. The convex balls 36 are made of high-strength stainless steel. These convex balls 36 are equivalent to built-in passive turbulence elements, which can help to break up agglomerates and prevent powder from adhering to the wall surface. At the same time, the semi-circular structure has no sharp edges, is easy to clean and not easy to wear, and enhances the long-term reliability of the device.

[0033] Reference Figure 1 and Figure 2 To improve the ease of use of the device, a storage chamber 37 is provided at the upper end of the mixing chamber 12. The storage chamber 37 contains cleaning balls 38. Hinged covers 41 are provided at both the bottom and top of the storage chamber 37. The cover 41 at the bottom of the storage chamber 37 leads into the mixing chamber 12. Several armature plates 39 are distributed on the surface of the cleaning balls 38. A long rod 40 with a magnet at its end is also provided on the frame 11. During cleaning, the cover 41 is opened, and the cleaning balls 38 fall into the mixing chamber 12. Under the action of the chamber's tumbling and liquid circulation, the cleaning balls 38 repeatedly collide and rub against the chamber wall, effectively removing materials adhering to the inner wall. After cleaning, the long rod 40 is used to attract the armature plates 39 on the surface of the cleaning balls 38, allowing them to be removed and recycled one by one. This structure achieves internal cleaning without opening the chamber, and is especially suitable for production change cleaning of high-viscosity or easily scaling well-killing fluids.

[0034] Example 2 To increase the ease of operation of the device, refer to Figure 1 and Figure 2 The pressure pump 21 has a first electromagnetic three-way valve 30 at its output end. The inlet pipe 15 is connected to one end of the first electromagnetic three-way valve 30 via a quick-connect valve. The other end of the first electromagnetic three-way valve 30 is connected to a discharge pipe 32. The pressure pump 21 has a second electromagnetic three-way valve 31 at its input end. The outlet pipe 16 is connected to one end of the second electromagnetic three-way valve 31 via a quick-connect valve. The other end of the second electromagnetic three-way valve 31 is connected to a feed pipe 33. By controlling the switching of the two electromagnetic three-way valves, the device can freely switch between two modes: circulation mixing and feed / discharge. In circulation mode, the pressure pump 21, inlet pipe 15, and outlet pipe 16 form a closed loop. In discharge mode, the prepared kill fluid is output through the discharge pipe 32. In feed mode, new base fluid can be drawn in through the feed pipe 33. This design enables continuous operation of fluid preparation, circulation, and output without disassembling pipelines, significantly improving operational convenience and efficiency.

[0035] It should be noted that the connection relationships of components not specifically mentioned in this application are all assumed to be based on existing technology. Since they do not involve the inventive point and are commonly used in existing technology, the structural connection relationships are not described in detail.

Claims

1. A well-killing fluid preparation and dispersion device, comprising a frame (11), characterized in that, A mixing chamber (12) is provided on the frame (11). A premixing component is provided between the frame (11) and the mixing chamber (12). The premixing component includes two support platforms (13) on the frame (11). The mixing chamber (12) is placed horizontally between the two support platforms (13). The outer wall of the middle part of the mixing chamber (12) is rotatably connected to the two support platforms (13). A driving unit is provided on the frame (11) to drive the mixing chamber (12) to flip up and down at both ends with the middle part as the center. A secondary mixing component is provided at the upper end of the mixing chamber (12). The secondary mixing component includes a... The mounting plate (14) at the upper end of the mixing chamber (12) is provided with an inlet pipe (15) and an outlet pipe (16) with valves. The outlet pipe (16) extends into the bottom of the mixing chamber (12) through a pipe. The inlet pipe (15) extends into the mixing chamber (12) and is provided with a mixing component at its end. The frame (11) is provided with a pressure pump (21). The input end of the pressure pump (21) is connected to the outlet pipe (16) through a quick-connect valve. The output end of the pressure pump (21) is connected to the inlet pipe (15) through a quick-connect valve.

2. The well-killing fluid preparation and dispersion device according to claim 1, characterized in that, The drive unit includes a gantry frame (22) mounted on the frame (11). The gantry frame (22) is oriented in the same horizontal direction as the mixing chamber (12). A rotating shaft (23) is provided on the gantry frame (22) along its length. Push cams (24) are provided at both ends of the rotating shaft (23). The two push cams (24) are set in opposite directions. Push plates (25) are provided at both ends of the mixing chamber (12). The push plates (25) are located within the movement trajectory of the protrusions of the push cams (24). A reduction motor (26) is provided in the middle of the rotating shaft (23). The output shaft of the reduction motor (26) is connected to the rotating shaft (23).

3. The well-killing fluid preparation and dispersion device according to claim 2, characterized in that, A buffer spring assembly (27) is provided between the push plate (25) and the mixing chamber (12). Rolling bearings (28) are distributed on the contact surface between the upper end of the push plate (25) and the push cam (24). Rolling bearings (28) are also distributed on the protrusion of the push cam (24).

4. The well-killing fluid preparation and dispersion device according to claim 2, characterized in that, The frame (11) is provided with a pad (29) at the bottom of the mixing chamber (12), and the pad (29) is sloping with one side higher than the other.

5. The well-killing fluid preparation and dispersion device according to claim 1, characterized in that, The output end of the pressurizing pump (21) is provided with a first electromagnetic three-way valve (30). The inlet pipe (15) is connected to one end of the first electromagnetic three-way valve (30) through a quick-connect valve. The other end of the first electromagnetic three-way valve (30) is connected to a discharge pipe (32). The input end of the pressurizing pump (21) is provided with a second electromagnetic three-way valve (31). The outlet pipe (16) is connected to one end of the second electromagnetic three-way valve (31) through a quick-connect valve. The other end of the second electromagnetic three-way valve (31) is connected to a feed pipe (33).

6. The well-killing fluid preparation and dispersion device according to claim 1, characterized in that, The mixing assembly includes a perforated plate (34) connected to the liquid inlet (15). The diameter of the holes on the perforated plate (34) gradually decreases from one end of the liquid inlet (15) to the outside. The perforated plate (34) has no less than three holes. The perforated plate (34) is connected to the end of the liquid inlet (15) through a pipe.

7. The well-killing fluid preparation and dispersion device according to claim 1, characterized in that, The sidewall of the mixing chamber (12) is provided with a number of semi-circular convex balls (36), which are made of high-strength stainless steel.

8. The well-killing fluid preparation and dispersion device according to claim 1, characterized in that, The mixing chamber (12) is provided with a storage chamber (37) at the upper end. The storage chamber (37) stores cleaning balls (38). The bottom and top of the storage chamber (37) are provided with hinged cover plates (41). The cover plate (41) at the bottom of the storage chamber (37) leads into the mixing chamber (12). The surface of the cleaning balls (38) is distributed with several armature plates (39). The frame (11) is also provided with a long rod (40) with a magnet at the end.

Images