A liquid preparation device for offshore oilfield profile control and water plugging

Abstract

The utility model relates to the technical field of water shutoff agent preparation, specifically relates to a sea oilfield profile control water plugging liquid preparation device, including preparation jar, the inside of preparation jar is provided with the preparation stirring rod that mixes and stirs to water shutoff agent, the outer wall top of preparation jar is provided with the mixing mechanism that carries out premixing to raw materials, the mixing mechanism includes powder prefabricated jar and liquid material prefabricated jar, powder prefabricated jar and liquid material prefabricated jar all are fixed through support on the outer wall top of preparation jar, the utility model discloses the powder prefabricated jar and liquid material prefabricated jar of setting can classify and mix raw materials in advance before adding agent pours into preparation jar, after finishing, it is even delivered to preparation jar through powder discharge jar and liquid distribution board respectively again, so this can avoid the situation that raw materials mix and gather and add to cause its easy appearance mixed unevenly, improve the mixing efficiency and mixing effect of profile control agent / water shutoff agent.

Description

Technical Field

[0001] This utility model relates to the field of water shut-off agent preparation technology, specifically to a water shut-off liquid preparation device for offshore oilfield profile control and plugging. Background Technology

[0002] The offshore oilfield profile control and water shut-off fluid preparation device is an integrated equipment system designed specifically for the special operating environment of offshore oilfields. It is used to accurately prepare profile control agent / water shut-off agent solutions. Its core function is to mix, dissolve, and mature chemical agents (such as polymers, crosslinking agents, granules, etc.) with seawater (or treated formation water) in the designed proportion to form a qualified shut-off and control fluid. This provides core material support for the operation of "blocking water outlet channels and adjusting water injection profiles" in offshore oilfields, ultimately solving the "water channeling" problem in offshore oilfield water injection development and improving crude oil recovery rate.

[0003] Existing profile control / water plugging agents consist of water, solid powder, and liquid additives. They need to be thoroughly mixed before being discharged. However, due to limitations in the mixing dead zones and the structure of the mixing blades, existing equipment often fails to mix the materials quickly and thoroughly, affecting the mixing effect and efficiency of the profile control / water plugging agent. Therefore, existing profile control and water plugging liquid preparation devices still have shortcomings. Utility Model Content

[0004] Therefore, this utility model provides a marine oilfield profile control and water shut-off fluid mixing device to solve the problem that existing mixing equipment, due to the limitations of the stirring dead zone and the structure of the stirring blade, easily leads to the inability of materials to be quickly and fully mixed, which affects the mixing effect and efficiency of the profile control / water shut-off agent.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a marine oilfield profile control and water shut-off fluid preparation device, comprising a preparation tank, wherein the preparation tank is provided with a preparation stirring rod for mixing and stirring the water shut-off agent inside, and a mixing mechanism for premixing the raw materials is provided at the top of the outer wall of the preparation tank.

[0006] Preferably, the mixing mechanism includes a powder pre-mixing tank and a liquid pre-mixing tank. Both the powder pre-mixing tank and the liquid pre-mixing tank are fixed to the top of the outer wall of the mixing tank by a bracket. A geared stirring motor is installed at the top of the outer wall of the powder pre-mixing tank, and a powder stirring blade is rotatably connected inside the powder pre-mixing tank and below the geared stirring motor.

[0007] Preferably, the bottom output shaft of the reduction stirring motor is fixed to the top of the outer wall of the powder stirring blade, and scrapers are fixed to the side ends of the outer wall of the powder stirring blade, with the side ends of the scrapers contacting the inner wall of the powder pre-mixing tank.

[0008] Preferably, a partition is fixed to the upper part of the interior of the preparation tank, and a powder discharge tank is rotatably connected to the top of the inner wall of the preparation tank and above the partition. A shaft fixing frame is fixed to the side of the inner wall of the powder discharge tank, and a drive shaft is rotatably connected to the center of the bottom of the outer wall of the powder pre-preparation tank. The upper end of the drive shaft is fixedly connected to the bottom end of the powder stirring blade.

[0009] Preferably, the bottom of the outer wall of the drive shaft passes through the top of the inner wall of the preparation tank and is fixedly connected to the top of the outer wall of the shaft fixing frame. The bottom of the outer wall of the powder pre-preparation tank, located outside the drive shaft, is connected to the top of the inner wall of the preparation tank, located inside the powder discharge tank, through a discharge pipe.

[0010] Preferably, a conical plate is fixed at the center of the bottom of the inner wall of the powder discharge tank, and multiple powder discharge pipes are fixedly connected to the bottom of the outer wall of the powder discharge tank and outside the conical plate. The multiple powder discharge pipes are evenly arranged in a ring array, and each powder discharge pipe has a discharge hole at the bottom of its inner wall.

[0011] Preferably, the outer wall of the partition is provided with through holes on both the upper and lower sides. The through holes are located on the outside of the powder discharge pipe. The upper end of the mixing rod passes through the through holes and is fixedly connected to the center of the bottom of the outer wall of the powder discharge tank.

[0012] Preferably, the bottom of the outer wall of the liquid pre-processing tank is connected to a drain pipe, and the bottom of the outer wall of each partition is fixed with a liquid distribution plate. The bottom of the drain pipe passes through the bottom of the outer wall of the partition and is connected to the top liquid inlet of the liquid distribution plate.

[0013] The beneficial effects of this utility model are: This invention, through the setting of powder pre-mixing tank and liquid pre-mixing tank, can pre-sort and mix raw materials before the additive is poured into the preparation tank. After completion, the raw materials are evenly transported to the preparation tank through the powder discharge tank and the liquid distribution plate. This can avoid the problem of uneven mixing caused by the raw materials being mixed and piled up, improve the mixing efficiency and effect of profile control agent / water-blocking agent, and make it more convenient for personnel to use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the external structure of the present invention viewed from the front. Figure 2 This is a cross-sectional view of the present invention from the front view. Figure 3 This is a cross-sectional view of the powder pre-forming tank in this utility model from the front view. Figure 4 This is a cross-sectional view of the powder discharge tank in this utility model from the front view. Figure 5This is a three-dimensional structural diagram of the powder discharge tank in this utility model, viewed from above.

[0015] In the diagram: 100, preparation tank; 110, partition plate; 120, preparation stirring rod; 200, powder pre-preparation tank; 210, geared stirring motor; 220, powder stirring blade; 221, scraper; 230, discharge pipe; 240, drive shaft; 241, synchronous belt pulley transmission mechanism; 300, liquid pre-preparation tank; 310, liquid separator; 400, powder discharge tank; 410, shaft fixing frame; 420, conical plate; 430, powder discharge pipe. Detailed Implementation

[0016] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0017] See attached document Figures 1-5 This utility model provides a marine oilfield profile control and water shut-off fluid preparation device, including a preparation tank 100. The preparation tank 100 has an internal mixing and stirring rod 120 for mixing and stirring the water shut-off agent. The top of the outer wall of the preparation tank 100 has a mixing mechanism for premixing raw materials. The mixing mechanism includes a powder pre-preparation tank 200 and a liquid pre-preparation tank 300, both fixed to the top of the outer wall of the preparation tank 100 by supports. The powder pre-preparation tank 200 is used for mixing and stirring powdered additives. A reduction-speed stirring motor 210 is installed on the top of the outer wall of the powder pre-preparation tank 200. A powder mixing blade 220 is rotatably connected below the reduction mixing motor 210. The bottom output shaft of the reduction mixing motor 210 is fixed to the top of the outer wall of the powder mixing blade 220. Scrapers 221 are fixed to the side ends of the outer wall of the powder mixing blade 220. The side ends of the scrapers 221 are in contact with the inner wall of the powder pre-mixing tank 200. The reduction mixing motor 210 can drive the powder mixing blade 220 to rotate after being powered on. When the powder mixing blade 220 rotates, it can mix and stir the powdered additives conveyed at the top of the powder pre-mixing tank 200. The scrapers 221 can scrape off the powder adhering to the inner wall of the powder pre-mixing tank 200. A partition 110 is fixed to the upper part of the interior of the preparation tank 100. A powder discharge tank 400 is rotatably connected to the top of the inner wall of the preparation tank 100 and above the partition 110. The outer wall of the powder discharge tank 400 is rotatably connected to the top of the inner wall of the preparation tank 100 via a guide rail or bearing seat. A shaft fixing bracket 410 is fixed to the side of the inner wall of the powder discharge tank 400. A drive shaft 240 is rotatably connected to the center of the bottom of the outer wall of the powder pre-processing tank 200. The upper end of the drive shaft 240 is connected to the powder mixing... The bottom end of the mixing blade 220 is fixedly connected, and the bottom end of the outer wall of the drive shaft 240 passes through the top end of the inner wall of the preparation tank 100 and is fixedly connected to the top end of the outer wall of the shaft fixing bracket 410. The drive shaft 240 is designed so that when the reduction stirring motor 210 drives the powder mixing blade 220 to rotate, it can drive the drive shaft 240 and the powder discharge tank 400 to rotate together. The bottom end of the outer wall of the powder pre-preparation tank 200, located outside the drive shaft 240, is connected to the preparation tank 100 through the discharge pipe 230. The inner wall of the powder pre-mixing tank 200 is connected to the powder discharge tank 400. A solenoid valve is installed at the upper end of the discharge pipe 230. The opening and closing of the solenoid valve controls whether the powder in the powder pre-mixing tank 200 is conveyed into the powder discharge tank 400. A conical plate 420 is fixed at the center of the bottom of the inner wall of the powder discharge tank 400. The conical plate 420 is designed to convey the powder towards the bottom edge of the inner wall of the powder discharge tank 400. The outer wall of the powder discharge tank 400... Multiple powder discharge pipes 430 are fixedly connected to the outer side of the conical plate 420. The multiple powder discharge pipes 430 are evenly arranged in a ring array. The bottom of the inner wall of each powder discharge pipe 430 is provided with a discharge hole. The powder discharge pipe 430 can evenly spray the powder in the powder discharge tank 400 into the preparation tank 100 through the bottom discharge hole. The bottom of the inner wall of the powder discharge tank 400 is recessed at the installation position of the powder discharge pipe 430, so that the powder can be discharged through the powder discharge pipe 430. The outer wall of the partition 110 has through holes on both the upper and lower sides. These through holes are located on the outside of the powder discharge pipe 430. The through holes are designed to prevent the partition 110 from affecting the rotation of the powder discharge pipe 430. The upper end of the stirring rod 120 passes through the through holes and is fixedly connected to the center of the bottom of the outer wall of the powder discharge tank 400. The bottom of the outer wall of the liquid pre-processing tank 300 is connected to a drain pipe. An stirring blade is rotatably connected inside the liquid pre-processing tank 300. The stirring rod of the stirring blade can be hollow. The upper end of the drain pipe can be rotatably connected to the inner wall of the stirring rod via a bearing seat. A liquid inlet is provided on the outer wall of the stirring rod at the bottom of the liquid pre-processing tank 300. The drive shaft 240 extends from the bottom of the stirring rod in the liquid pre-processing tank 300. Part of the connection is made through a synchronous belt pulley transmission mechanism 241, which enables the transmission shaft 240 to drive the stirring blades inside the liquid pre-mixing tank 300 to rotate when it rotates. The synchronous belt pulley transmission mechanism 241 includes two synchronous pulleys, a synchronous belt for transmission, and a tensioning mechanism, which enables the liquid pre-mixing tank 300 to mix and stir the liquid additives inside. The bottom of the outer wall of the partition 110 is fixed with a liquid distribution plate 310. The bottom end of the drain pipe passes through the bottom of the outer wall of the partition 110 and is connected to the top liquid inlet of the liquid distribution plate 310. The drain pipe can transport the mixed liquid additives into the liquid distribution plate 310, so that the liquid distribution plate 310 can evenly add the liquid additives to different positions in the preparation tank 100.

[0018] The usage process of this utility model is as follows: First, assemble the device according to the above description, then connect all electrical equipment to an external power supply, and control the operation of the device through an external controller. The control programs of all electrical equipment are edited by technicians in advance before production. This utility model does not make any technical improvements here, but assumes that it can normally meet the needs of operators. First, an appropriate amount of water can be delivered to the mixing tank 100 through the addition pipe. Meanwhile, pre-weighed powdered additives and liquid auxiliary additives can be delivered to the powder pre-mixing tank 200 and the liquid pre-mixing tank 300 via the conveying equipment. Then, the operator can power on the reduction geared stirring motor 210, causing it to drive the powder mixing blades 220 to rotate. As the mixing blades 220 rotate, they agitate the powder added to the powder pre-mixing tank 200 and simultaneously drive the drive shaft 240 to rotate. The drive shaft 240, through the shaft fixing bracket 410, drives the powder discharge tank 400 to rotate, and also drives the synchronous belt pulley transmission mechanism 24... 1. The stirring shaft inside the liquid pre-mixing tank 300 rotates, thereby mixing the liquid additives added inside the liquid pre-mixing tank 300. After the mixing time is reached, the operator can open the solenoid valves on the discharge pipe 230 and the liquid discharge pipe. The powder in the powder pre-mixing tank 200 is then transported to the powder discharge tank 400 through the discharge pipe 230. From the powder discharge tank 400, the powder is evenly sprayed into the preparation tank 100 through the rotating powder discharge pipe 430, allowing the mixing stirring rod 120 to mix it with water. At the same time, the liquid discharge pipe transports the liquid additives to the distribution plate 310, allowing the distribution plate 310 to evenly spray them onto different positions in the preparation tank 100. This allows the materials to be stirred and mixed using the stirring rod 120, improving the mixing effect of the profile control agent / water-blocking agent solution. Once the operator confirms that the mixing is complete by taking a sample (or based on the stirring time), the solenoid valve on the bottom pipe of the preparation tank 100 can be opened to discharge the profile control agent / water-blocking agent.

[0019] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A device for profile control and water shut-off fluid preparation in offshore oilfields, characterized in that: It includes a preparation tank (100), the interior of which is provided with a mixing rod (120) for mixing and stirring the water-blocking agent, and the top of the outer wall of the preparation tank (100) is provided with a mixing mechanism for premixing the raw materials; The mixing mechanism includes a powder pre-mixing tank (200) and a liquid pre-mixing tank (300). Both the powder pre-mixing tank (200) and the liquid pre-mixing tank (300) are fixed to the top of the outer wall of the preparation tank (100) by a bracket. A geared stirring motor (210) is installed on the top of the outer wall of the powder pre-mixing tank (200). A powder stirring blade (220) is rotatably connected inside the powder pre-mixing tank (200) and below the geared stirring motor (210).

2. The offshore oilfield profile control and water plugging solution preparation device according to claim 1, characterized in that: The bottom output shaft of the speed-reducing stirring motor (210) is fixed to the top of the outer wall of the powder stirring blade (220). Scrapers (221) are fixed to the outer side of the powder stirring blade (220). The side of the scraper (221) is in contact with the inner wall of the powder pre-processing tank (200).

3. The offshore oilfield profile control and water plugging solution preparation device according to claim 2, characterized in that: A partition plate (110) is fixed to the upper part of the interior of the preparation tank (100). A powder discharge tank (400) is rotatably connected to the top of the inner wall of the preparation tank (100) and above the partition plate (110). A shaft fixing bracket (410) is fixed to the side of the inner wall of the powder discharge tank (400). A drive shaft (240) is rotatably connected to the center of the bottom of the outer wall of the powder pre-preparation tank (200). The upper end of the drive shaft (240) is fixedly connected to the bottom end of the powder stirring blade (220).

4. The offshore oilfield profile control and water shut-off fluid preparation device according to claim 3, characterized in that: The bottom of the outer wall of the drive shaft (240) passes through the top of the inner wall of the preparation tank (100) and is fixedly connected to the top of the outer wall of the shaft fixing frame (410). The bottom of the outer wall of the powder pre-preparation tank (200) located outside the drive shaft (240) is connected to the top of the inner wall of the preparation tank (100) located inside the powder discharge tank (400) through the discharge pipe (230).

5. The offshore oilfield profile control and water plugging solution preparation device according to claim 4, characterized in that: A conical plate (420) is fixed at the center of the bottom of the inner wall of the powder discharge tank (400). Multiple powder discharge pipes (430) are fixedly connected to the bottom of the outer wall of the powder discharge tank (400) and outside the conical plate (420). The multiple powder discharge pipes (430) are evenly arranged in a ring array. The bottom of the inner wall of each powder discharge pipe (430) is provided with a discharge hole.

6. The offshore oilfield profile control and water plugging solution preparation device according to claim 5, characterized in that: The upper and lower sides of the outer wall of the partition (110) are provided with through holes. The through holes are located on the outside of the powder discharge pipe (430). The upper end of the mixing rod (120) passes through the through hole and is fixedly connected to the center of the bottom of the outer wall of the powder discharge tank (400).

7. The offshore oilfield profile control and water plugging solution preparation device according to claim 6, characterized in that: The bottom of the outer wall of the liquid pre-processing tank (300) is connected to a drain pipe, and the bottom of the outer wall of the partition (110) is fixed with a liquid distribution plate (310). The bottom of the drain pipe passes through the bottom of the outer wall of the partition (110) and is connected to the top liquid inlet of the liquid distribution plate (310).

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