Simple deep well liquid control and mixing system and operation method

Abstract

The invention discloses a simple deep well liquid control and mixing system which comprises a fresh water pipeline, an ethylene glycol cabinet, a water-based soluble concentrated liquid cabinet, a main pipeline, a filter, a mixed liquid cabinet and a hydraulic pump station connector, the fresh water pipeline is communicated with the input end of the main pipeline, an opening type valve and a flow meter are connected to the fresh water pipeline, and the ethylene glycol cabinet is communicated with the input end of the main pipeline. An ethylene glycol conveying pump is connected between the ethylene glycol cabinet and the input end of the main pipeline in series, the water-based soluble concentrated solution cabinet is communicated with the input end of the main pipeline, the output end of the main pipeline is connected with the input end of the filter, the output end of the filter is connected with the mixed solution cabinet, and the mixed solution cabinet is connected with the hydraulic pump station connector. And a liquid level switch is arranged on the mixed liquid cabinet. According to the simple deep well liquid control and mixing system, a water tank is not used, the occupied space is reduced, the liquid mixing system is simplified, and therefore the fault probability is reduced, and the invention further provides an operation method of the simple deep well liquid control and mixing system.

Description

Technical Field

[0001] The invention belongs to the field of deepwater drilling equipment, and in particular relates to a simple deepwater well control liquid mixing system and an operation method. Background Art

[0002] The deepwater well control hydraulic control system is a key technology used in the development of deepwater oil and gas fields. It involves equipment that effectively controls the wellhead under high pressure and complex marine environments. The deepwater well control hydraulic control system plays a vital role in the entire well control operation and directly affects whether the well control operation can operate normally and reliably. As the front end of the deepwater well control hydraulic control system, the deepwater well control mixing system needs to deliver control fluid with a suitable mixing ratio to the deepwater well control hydraulic control system. At present, the existing water tank-type deepwater well control mixing system has a relatively large overall size, occupies more space in the drilling device, and the control system is relatively complex and the probability of failure is increased. Therefore, in order to avoid the shortcomings of the existing technology, it is necessary to improve the existing technology. Summary of the invention

[0003] The purpose of the present invention is to provide a simple deep-water well control mixing system, which can eliminate the need for a water tank, reduce the occupied space, simplify the mixing system, and thus reduce the probability of failure. The present invention also provides an operating method for the simple deep-water well control mixing system.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0005] A simple deepwater well control mixed liquid system comprises a fresh water pipeline, an ethylene glycol tank, a water-based soluble concentrate tank, a main pipeline, a filter, a mixed liquid tank and a hydraulic pump station interface, wherein the fresh water pipeline is connected to the input end of the main pipeline, an opening valve and a flow meter are connected to the fresh water pipeline, the ethylene glycol tank is connected to the input end of the main pipeline, an ethylene glycol delivery pump is connected in series between the ethylene glycol tank and the input end of the main pipeline, the water-based soluble concentrate tank is connected to the input end of the main pipeline, a water-based soluble concentrate delivery pump is connected in series between the water-based soluble concentrate tank and the input end of the main pipeline, the output end of the main pipeline is connected to the input end of the filter, the output end of the filter is connected to the mixed liquid tank, the mixed liquid tank is connected to the hydraulic pump station interface, a liquid level switch is provided on the mixed liquid tank, and the liquid level switch is respectively provided with a first liquid level, a second liquid level, a third liquid level and a fourth liquid level from high to low.

[0006] As a preferred solution of the above-mentioned simple deep-water well control mixed liquid system, there are three filters, and the three filters are connected in parallel.

[0007] As a preferred solution of the above-mentioned simple deepwater well control mixed liquid system, the mixed liquid cabinet is connected to a circulation pump, the output end of the mixed liquid cabinet is connected to the input end of the circulation pump, and the output end of the circulation pump is connected to the input end of the mixed liquid cabinet.

[0008] As a preferred solution of the above-mentioned simple deep-water well control mixed liquid system, the mixed liquid cabinet is provided with a reflux pipeline interface, and the reflux pipeline interface is connected to the hydraulic system of the hydraulic equipment.

[0009] As a preferred solution of the above-mentioned simple deep-water well control mixed liquid system, the mixed liquid cabinet is provided with an emergency standby interface for directly adding hydraulic control liquid.

[0010] As a preferred solution of the above-mentioned simple deep-water well control mixing system, the opening type valve is an opening type remote control valve, and the flow meter is a non-contact flow meter.

[0011] As a preferred solution of the above-mentioned simple deep-water well control mixed liquid system, there are two opening type valves, and the two opening type valves are connected in parallel.

[0012] As a preferred solution of the above-mentioned simple deep-water well control mixed liquid system, the ethylene glycol tank, the water-based soluble concentrate tank and the mixed liquid tank are respectively provided with air-permeable valves.

[0013] As a preferred solution of the above-mentioned simple deep-water well control mixed liquid system, liquid level switches are respectively provided on the ethylene glycol tank and the water-based soluble concentrate tank.

[0014] The present invention also provides an operation method of a simple deepwater well control liquid mixing system. Liquid mixing is performed by the simple deepwater well control liquid mixing system, comprising the following steps: opening the opening valve, opening the ethylene glycol delivery pump, and opening the water-based soluble concentrated liquid delivery pump, and fresh water, ethylene glycol and water-based soluble concentrated liquid are delivered to the filter through the main pipeline, and then delivered to the mixed liquid tank after being filtered by the filter;

[0015] When the liquid level of the mixed liquid tank rises to the highest first liquid level, the ethylene glycol delivery pump and the water-based soluble concentrate delivery pump are stopped, and the opening valve is closed;

[0016] When the liquid level of the mixed liquid tank drops to a second liquid level, the ethylene glycol delivery pump and the water-based soluble concentrate delivery pump are started, and the opening valve is started;

[0017] When the liquid level of the mixed liquid tank drops to the third liquid level, a low level alarm is issued;

[0018] When the liquid level of the mixed liquid tank drops to the fourth liquid level, the circulation pump and the pump group of the hydraulic pump station are stopped.

[0019] The simple deepwater well control liquid mixing system provided by the present invention has the following beneficial effects compared with the prior art:

[0020] The present invention is connected to a fresh water source through a fresh water pipeline. The fresh water source is tap water on land or fresh water purification equipment at sea. The opening valve can adjust the valve opening to control the fluid flow. The opening is adjusted by the opening valve, and the input flow of fresh water is monitored by a flow meter. Fresh water is directly transported, so there is no need to set up a water tank, which reduces the occupied space. Since the main component of the mixed liquid used in deep-water well control is fresh water, the water tank is large in size and occupies more space in the drilling device. In this way, the fresh water delivery can be controlled by the opening valve and the flow meter, so there is no need to set up a water tank, which greatly reduces the space. It takes up space. The ethylene glycol cabinet conveys ethylene glycol to the main line through the ethylene glycol delivery pump. The water-based soluble concentrate cabinet conveys the water-based soluble concentrate to the main line through the water-based soluble concentrate delivery pump. Fresh water, ethylene glycol and water-based soluble concentrate are gathered in the main line and transported to the filter through the main line. The clean mixed liquid is filtered through the filter and transported to the mixed liquid cabinet for storage. The mixed liquid cabinet is connected to the hydraulic pump station interface to transport the mixed liquid, which is then transported to various hydraulic equipment through the hydraulic pump station. The entire mixed liquid system has a simple structure and can reduce the probability of failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0022] Figure 1 It is a schematic diagram of a simple deep-water well controlled mixed liquid system of the present invention.

[0023] Markings in the figure:

[0024] 1. Fresh water pipeline; 2. Opening valve; 3. Flow meter; 4. Breathing valve; 5. Liquid level switch; 6. Ethylene glycol cabinet; 7. Ethylene glycol delivery pump; 8. Water-based soluble concentrate cabinet; 9. Water-based soluble concentrate delivery pump; 10. Filter; 11. Mixing liquid cabinet; 12. Circulation pump; 13. Hydraulic pump station interface; 14. Return pipeline interface; 15. Emergency standby interface; 16. Main pipeline. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] Please also read Figure 1 Now, the simple deepwater well controlled liquid mixing system provided by an embodiment of the present invention is described.

[0030] like Figure 1 As shown, the simple deepwater well control mixed liquid system of the present invention comprises a fresh water pipeline, an ethylene glycol tank 6, a water-based soluble concentrate tank 8, a main pipeline 16, a filter 10, a mixed liquid tank 11 and a hydraulic pump station interface 13, wherein the fresh water pipeline is connected to the input end of the main pipeline 16, an opening valve 2 and a flow meter 3 are connected to the fresh water pipeline, the ethylene glycol tank 6 is connected to the input end of the main pipeline 16, an ethylene glycol delivery pump 7 is connected in series between the ethylene glycol tank 6 and the input end of the main pipeline 16, and the water-based soluble concentrate tank 8 is connected to the mixing liquid tank 11. It is connected to the input end of the main line 16, and a water-based soluble concentrated liquid delivery pump 9 is connected in series between the water-based soluble concentrated liquid tank 8 and the input end of the main line 16. The output end of the main line 16 is connected to the input end of the filter 10, and the output end of the filter 10 is connected to the mixed liquid tank 11. The mixed liquid tank 11 is connected to the hydraulic pump station interface 13. A liquid level switch 5 is provided on the mixed liquid tank 11, and the liquid level switch 5 is respectively set with a first liquid level, a second liquid level, a third liquid level and a fourth liquid level from high to low.

[0031] Exemplarily, there are three filters 10, and the three filters 10 are connected in parallel. When the three filters 10 are connected in parallel, only one filter 10 will be opened in normal use. When the filter 10 fails, other parallel filters 10 can be started for filtering to ensure normal filtering and improve the reliability of the system.

[0032] Exemplarily, the mixed liquid cabinet 11 is connected to a circulation pump 12, the output end of the mixed liquid cabinet 11 is connected to the input end of the circulation pump 12, the output end of the circulation pump 12 is connected to the input end of the mixed liquid cabinet 11, the circulation pump 12 and the mixed liquid cabinet 11 form a circulation pipeline, and the circulation pump 12 starts to circulate and stir the mixed control liquid in the mixed liquid cabinet 11 at a regular time to keep the mixed control liquid fully mixed. A filter is provided in front of the circulation pump 12 for filtering the mixed control liquid.

[0033] Exemplarily, the mixed liquid tank 11 is provided with a reflux pipeline interface 14, which is connected to the hydraulic system of the hydraulic equipment. The control fluid of the recyclable hydraulic equipment is refluxed to the mixed liquid tank 11 through the reflux pipeline interface 14, so as to facilitate the reuse of the mixed liquid. The refluxed mixed liquid is transported to the circulation pipeline through the circulation pump 12 for filtration and then flows back to the mixed liquid tank 11. After filtration, it is transported to each hydraulic equipment through the hydraulic pump station interface 13 for continued use.

[0034] Exemplarily, the mixed liquid cabinet 11 is provided with an emergency standby interface 15 for directly adding hydraulic control liquid. The emergency standby interface 15 is used to directly add mixed control liquid to the mixed liquid cabinet 11 when the mixed liquid system fails, thereby ensuring that the hydraulic equipment can maintain normal operation and improving the safety of the system.

[0035] Exemplarily, the opening valve 2 is an opening remote control valve, and the flow meter 3 is a non-contact flow meter 3. The flow of fresh water can be remotely controlled and adjusted through the opening remote control valve and the non-contact flow meter 3, so that fresh water can be accurately delivered without a water tank. The non-contact flow meter 3 is used to measure the flow of fresh water flowing in the pipeline, and cooperates with the opening remote control valve to remotely measure the flow of fresh water. The opening remote control valve is used to automatically control the amount of fresh water entering the mixed liquid tank 11. The opening value range is set according to the ratio of fresh water, ethylene glycol, and water-based soluble concentrate required by the proposed operating wellhead environment; the valve is made of stainless steel, and its diameter / pressure is obtained according to the volume and pressure requirements of the mixed liquid tank 11; pneumatic, electric and other remote control methods can be selected. Specifically, a liquid level meter is provided on the mixed liquid tank 11. When the non-contact flow meter 3 fails, the filling amount can be observed through the liquid level meter on the mixed liquid tank 11 without affecting the continued operation of the system.

[0036] Exemplarily, there are two opening type valves 2, and the two opening type valves 2 are connected in parallel. When one of the opening type valves 2 fails, the other one can be started to maintain stable delivery of fresh water, ensuring stable and normal operation of the system.

[0037] Exemplarily, the ethylene glycol cabinet 6, the water-based soluble concentrate cabinet 8 and the mixed liquid cabinet 11 are respectively provided with ventilation valves 4, which are connected to the external environment. The ventilation valves 4 are used for ventilation of the ethylene glycol cabinet 6, the water-based soluble concentrate cabinet 8 and the mixed liquid cabinet 11.

[0038] Exemplarily, the glycol tank 6 and the water-based soluble concentrate tank 8 are respectively provided with a liquid level switch 5, which is arranged at different heights on the glycol tank 6 and the water-based soluble concentrate tank 8, and is used for liquid level alarm and start-stop pump group of the tank according to functional requirements. The glycol tank 6 and the water-based soluble concentrate tank 8 are provided with a low-level switch for low-level alarm and stopping the operation of the glycol delivery pump 7 and the water-based soluble concentrate delivery pump 9.

[0039] The present invention also provides an operation method of a simple deepwater well control liquid mixing system. Liquid mixing is performed by the simple deepwater well control liquid mixing system, comprising the following steps: opening the opening valve 2, opening the ethylene glycol delivery pump 7, and opening the water-based soluble concentrated liquid delivery pump 9, and fresh water, ethylene glycol and water-based soluble concentrated liquid are delivered to the filter 10 through the main pipe 16, and then delivered to the mixed liquid tank 11 after being filtered by the filter 10;

[0040] When the liquid level of the mixed liquid tank 11 rises to the highest first liquid level, the ethylene glycol delivery pump 7 and the water-based soluble concentrate delivery pump 9 are stopped, and the opening valve 2 is closed to avoid the mixed liquid overflowing from the mixed liquid tank 11 and causing waste.

[0041] When the liquid level of the mixed liquid tank 11 drops to the second liquid level, the ethylene glycol delivery pump 7 and the water-based soluble concentrate delivery pump 9 are started, and the opening valve 2 is started; when the liquid level drops to the second liquid level, the mixed liquid is delivered to the mixed liquid tank 11 in time.

[0042] When the liquid level of the mixed liquid tank 11 drops to the third liquid level, a low level alarm is triggered; the staff checks whether the mixing liquid system has a fault and manually adds mixed liquid to the mixed liquid tank 11; when the liquid level drops to the third liquid level, the operating power of the ethylene glycol delivery pump 7 and the water-based soluble concentrate delivery pump 9 can be increased, and the opening of the opening valve 2 can be increased to achieve the effect of quickly replenishing the mixed liquid.

[0043] When the liquid level of the mixed liquid tank 11 drops to the fourth liquid level, the circulating pump 12 and the pump group of the hydraulic pump station are stopped; the mixed liquid system is inspected and repaired to prevent the circulating pump 12 from continuing to run and burning out when the liquid level is exhausted.

[0044] The mixed liquid cabinet 11 is provided with liquid level switches 5 at different heights, and is provided with a first liquid level, a second liquid level, a third liquid level and a fourth liquid level from high to low. The highest first liquid level is used to stop the ethylene glycol delivery pump 7 and the water-based soluble concentrate delivery pump 9, and the ethylene glycol delivery pump 7 and the water-based soluble concentrate delivery pump 9 are started at the second liquid level. A low level alarm is issued at the third liquid level, and the circulation pump 12 and the hydraulic pump station pump group are stopped at the fourth liquid level. Fresh water delivery, ethylene glycol delivery pump 7 and water-based soluble concentrate delivery pump 9 are operated independently to ensure stability. After delivery and convergence to the main line 16, filtration is carried out. There is no chemical reaction between fresh water, ethylene glycol and water-based soluble concentrate, so they can be converged to the main line 16 to share a filter for filtration, which simplifies the structure of the entire mixed liquid system and reduces the probability of failure.

[0045] Specifically, in actual operation, the opening value of the opening remote control valve is selected in the system according to the current wellhead environment. The system is set in automatic control mode. When the liquid level switch 5 of the second liquid level of the mixing liquid tank 11 is triggered, the opening remote control valve will open to allow the fresh water connected to the fresh water pipeline 1 or the water produced by the fresh water generator to be added, and the non-contact flow meter 3 records the circulating fresh water flow in real time; the ethylene glycol delivery pump 7 extracts an appropriate amount of ethylene glycol from the ethylene glycol tank 6 and delivers it to the mixing liquid tank 11, and the water-based soluble concentrate pump extracts an appropriate amount of water-based soluble concentrate from the water-based soluble concentrate tank 8 to the mixing liquid tank 11. When the liquid level switch 5 of the first liquid level of the mixing liquid tank 11 is triggered, the opening remote control valve is closed, and the above-mentioned pump groups all stop running, and the system completes or stops the current mixing operation. When the liquid level switch 5 of the third liquid level of the mixing liquid tank 11 is triggered, an audible and visual alarm will appear on the remote interface to inform the operator that the fault point needs to be eliminated. When the liquid level switch 5 of the fourth liquid level of the mixed liquid tank 11 is triggered, the system will automatically stop the circulating pump 12 and the hydraulic pump station pump group. When the low-level stop pump liquid level switch 5 of any ethylene glycol tank 6 or water-based soluble concentrate tank 8 is triggered, the system will issue an audible and visual alarm, and the ethylene glycol delivery pump 7 and the control liquid delivery pump will stop or remain in the stop state at the same time. At this time, human intervention is required to troubleshoot the problem. In addition, the ethylene glycol delivery pump 7 and the water-based soluble concentrate delivery pump 9 can manually adjust the flow rate required for the current operation on the spot, or manually isolate and stop the operation of the ethylene glycol delivery pump 7 on the spot according to the current operation situation, which is simple to operate. When the ethylene glycol delivery pump 7 or the water-based soluble concentrate pump fails, manual emergency refilling can be performed through the emergency standby interface 15 on the mixed liquid tank 11. If the system selects the manual control mode, the operator can start and stop the corresponding pump group, adjust the required flow rate, and perform related inspection and maintenance work according to the actual operation situation.

[0046] The simple deepwater well control liquid mixing system provided by the present invention has the following beneficial effects compared with the prior art:

[0047] The present invention is connected to a fresh water source through a fresh water pipeline 1. The fresh water source is tap water on land or fresh water purification equipment at sea. The opening valve 2 can adjust the valve opening to control the fluid flow. The opening is adjusted by the opening valve 2, and the input flow of fresh water is monitored by the flow meter 3. Fresh water is directly transported, so there is no need to set up a water tank, which reduces the occupied space. Since the main component of the mixed liquid used in deepwater well control is fresh water, the water tank is large in size and occupies more space in the drilling device. In this way, the fresh water delivery is controlled by the opening valve 2 and the flow meter 3, and the water tank does not need to be set up, which greatly reduces the occupied space. The ethylene glycol tank 6 transports ethylene glycol to the main pipeline 16 through the ethylene glycol delivery pump 7, and the water-based soluble concentrate tank 8 transports the water-based soluble concentrate to the main pipeline 16 through the water-based soluble concentrate delivery pump 9. Fresh water, ethylene glycol, and ethylene glycol are transported to the main pipeline 16 by the ethylene glycol delivery pump 7. The glycol and the water-based soluble concentrate are gathered into the main pipeline 16, and are transported to the filter 10 through the main pipeline 16. A clean mixed liquid is obtained by filtering through the filter 10 and is transported to the mixed liquid cabinet 11 for storage. The mixed liquid cabinet 11 is connected to the hydraulic pump station interface 13 to transport the mixed liquid, and then transported to various hydraulic equipment through the hydraulic pump station. The mixed liquid cabinet 11 is provided with liquid level switches 5 at different heights, and a first liquid level, a second liquid level, a third liquid level and a fourth liquid level are arranged from high to low. The highest first liquid level is used to stop the ethylene glycol delivery pump 7 and the water-based soluble concentrate delivery pump 9, and the ethylene glycol delivery pump 7 and the water-based soluble concentrate delivery pump 9 are started at the second liquid level. A low level alarm is issued at the third liquid level, and the circulation pump 12 and the hydraulic pump station pump group are stopped at the fourth liquid level. The entire mixed liquid system has a simple structure and can reduce the probability of failure.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A simple deepwater well control liquid mixing system, characterized in that: It includes fresh water pipeline, glycol tank, water-based soluble concentrate tank, main pipeline, filter, mixed liquid tank and hydraulic pump station interface; The fresh water pipeline is in communication with the input end of the main pipeline, and an opening valve and a flow meter are connected to the fresh water pipeline; The ethylene glycol cabinet is in communication with the input end of the main pipeline, and an ethylene glycol delivery pump is connected in series between the ethylene glycol cabinet and the input end of the main pipeline; The water-based soluble concentrated liquid tank is in communication with the input end of the main pipeline, and a water-based soluble concentrated liquid delivery pump is connected in series between the water-based soluble concentrated liquid tank and the input end of the main pipeline; The output end of the main pipeline is connected to the input end of the filter, the output end of the filter is connected to the mixed liquid cabinet, and the mixed liquid cabinet is connected to the interface of the hydraulic pump station; The mixed liquid cabinet is provided with a liquid level switch, and the liquid level switch is respectively provided with a first liquid level, a second liquid level, a third liquid level and a fourth liquid level from high to low.

2. The simple deepwater well control liquid mixing system according to claim 1, characterized in that: There are three filters, and the three filters are connected in parallel.

3. The simple deepwater well control liquid mixing system according to claim 1, characterized in that: The mixed liquid cabinet is connected to a circulation pump, the output end of the mixed liquid cabinet is connected to the input end of the circulation pump, and the output end of the circulation pump is connected to the input end of the mixed liquid cabinet.

4. The simple deepwater well control liquid mixing system according to claim 1, characterized in that: The mixed liquid cabinet is provided with a reflux pipeline interface, and the reflux pipeline interface is connected to the hydraulic system of the hydraulic equipment.

5. The simple deepwater well control liquid mixing system according to claim 1, characterized in that: The mixed liquid cabinet is provided with an emergency standby interface for directly adding hydraulic control liquid.

6. The simple deepwater well control liquid mixing system according to claim 1, characterized in that: The opening type valve is an opening type remote control valve, and the flow meter is a non-contact flow meter.

7. The simple deepwater well control liquid mixing system according to claim 1, characterized in that: There are two opening type valves, and the two opening type valves are connected in parallel.

8. The simple deepwater well control liquid mixing system according to claim 1, characterized in that: The ethylene glycol cabinet, the water-based soluble concentrated liquid cabinet and the mixed liquid cabinet are respectively provided with air-permeable valves.

9. The simple deepwater well control mixed liquid system according to claim 1, characterized in that: The ethylene glycol tank and the water-based soluble concentrated liquid tank are respectively provided with liquid level switches.

10. A method for operating a simple deepwater well control mixing system, characterized in that: Mixing liquids by using the simple deepwater well control liquid mixing system as claimed in any one of claims 1 to 9, comprising the following steps: opening the opening valve, opening the ethylene glycol delivery pump, opening the water-based soluble concentrate delivery pump, and delivering fresh water, ethylene glycol and water-based soluble concentrate to the filter through the main pipeline, and then delivering to the mixed liquid tank after being filtered by the filter; When the liquid level of the mixed liquid tank rises to the highest first liquid level, the ethylene glycol delivery pump and the water-based soluble concentrate delivery pump are stopped, and the opening valve is closed; When the liquid level of the mixed liquid tank drops to a second liquid level, the ethylene glycol delivery pump and the water-based soluble concentrate delivery pump are started, and the opening valve is started; When the liquid level of the mixed liquid tank drops to the third liquid level, a low level alarm is issued; When the liquid level of the mixed liquid tank drops to the fourth liquid level, the circulation pump and the pump group of the hydraulic pump station are stopped.

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