A control system and method for multi-tank feeding and liquid mixing in drilling

Abstract

The present invention provides a control system and method for multi-tank feeding and mixing in drilling, wherein the feeding tank is provided with a slurry feed valve, a slurry drain valve, a feeding feed valve, and a feeding drain valve, the mixing tank is provided with a slurry drain valve, a mixing pump is connected to the slurry feed valve and the slurry drain valve respectively, the feeding pump is connected to the feeding feed valve and the feeding drain valve respectively, the feeding feed valve on the feeding tank is connected to the mixing tank via a connecting valve, the mixing tank is connected to a slurry source, a circulating pump is provided at the outlet of the mixing tank, and an electric control system is electrically connected to the slurry feed valve, the slurry drain valve, the feeding feed valve, the feeding drain valve, the connecting valve, the feeding pump, and the mixing pump. The system and method provided by the present invention promote the intelligentization of drilling engineering equipment, reduce the workload of operators, ensure safe operation, have a high degree of automation, improve work efficiency, and prevent the occurrence of underground complexities and liquid spillage and pollution of the environment caused by operator misoperation.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling fluid circulation system control, and in particular to a control system and method for multi-tank feeding and liquid mixing in drilling. Background Art

[0002] As drilling technology and equipment continue to advance with the development of the petroleum industry, my country's oil drilling industry has gradually adopted intelligent drilling technology. However, due to technical and financial constraints, intelligent drilling circulation systems are significantly lagging behind. Currently, drilling fluid circulation systems primarily rely on manual operation of butterfly valves for filling and draining the various circulation tanks to achieve slurry mixing and preparation. This is not only labor-intensive but also prone to operational errors, resulting in complex accidents and environmental pollution caused by fluid spills. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a control system and method for multi-tank feeding and mixing in drilling. On the one hand, it realizes the intelligence of engineering equipment, and on the other hand, it reduces the workload of operators, ensures safe operation, high degree of automation, and improves work efficiency. At the same time, it can prevent the underground complexity and liquid overflow pollution caused by the staff's misoperation.

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

[0005] A control system for multi-tank feeding and liquid mixing in drilling, comprising a feeding tank, a liquid mixing tank, a feeding pump, a liquid mixing pump and an electronic control system, wherein the feeding tank is provided with a slurry mixing water supply valve, a slurry mixing water discharge valve, a feeding water supply valve and a feeding water discharge valve, the liquid mixing tank is provided with a slurry mixing water discharge valve, the liquid mixing pump is respectively connected to the slurry mixing water supply valve and the slurry mixing water discharge valve, the feeding pump is respectively connected to the feeding water supply valve and the feeding water discharge valve, the feeding water supply valve on the feeding tank is connected to the liquid mixing tank through a connecting valve, the liquid mixing tank is connected to a mud source, a circulating pump is provided at the outlet of the liquid mixing tank, and the electronic control system is respectively electrically connected to the slurry mixing water supply valve, the slurry mixing water discharge valve, the feeding water supply valve, the feeding water discharge valve, the connecting valve, the feeding pump and the liquid mixing pump.

[0006] According to the control system for multi-tank feeding and liquid mixing for drilling of the present invention, an intelligent control system is used to control different valves on the circulation tank, which can effectively realize the functions of multi-tank slurry matching and liquid mixing. The electronic control system performs functional settings for slurry matching, liquid mixing mode, liquid mixing volume and time. On the one hand, it promotes the intelligence of drilling engineering equipment, and on the other hand, it reduces the workload of operators, ensures safe operation, has a high degree of automation, and improves work efficiency. At the same time, it can prevent the underground complexity and liquid overflow pollution caused by misoperation of the staff.

[0007] The above technical solution can be further improved as described below.

[0008] According to the control system for multi-tank feeding and liquid mixing for drilling of the present invention, in a preferred embodiment, the feeding tanks include at least two groups, and the feeding and water supply valves on each group of feeding tanks are connected to each other and connected to the liquid mixing tank through a connecting valve.

[0009] By setting up multiple groups of feeding tanks, the electronic control system can control any group of tanks to mix slurry and liquid according to actual needs, or control multiple groups of tanks to mix slurry and liquid at the same time, thereby greatly improving the applicability of the entire control system.

[0010] Furthermore, in a preferred embodiment, the liquid mixing tanks include at least two groups, and the liquid mixing tanks in each group are interconnected.

[0011] By setting up multiple groups of mixing tanks, the electronic control system can control any group of mixing tanks to mix the liquid according to actual needs, and the remaining mixing tanks can play a good buffering role in the circulation process, improving the stability and reliability of the system, thereby greatly improving the applicability of the entire control system.

[0012] Furthermore, in a preferred embodiment, the multi-tank feeding and liquid mixing control system for drilling according to the present invention also includes a solid control tank connected to the wellhead mud source and the liquid mixing tank respectively, and a vibrating screen and sand removal equipment are provided in the solid control tank.

[0013] The mud circulating out of the wellhead passes through the vibrating screen and sand removal equipment in the solids control tank, which can effectively filter the mud and avoid affecting the stability and reliability of the entire control system during the mud circulation process.

[0014] Furthermore, in a preferred embodiment, the solid control tanks include at least two groups, and at least two stages of sand removal equipment are provided in the solid control tanks.

[0015] By setting up multiple groups of solid control tanks and sand removal equipment, on the one hand, it can play a good buffering role in the circulation process of the mud to ensure the stability of the entire control system; on the other hand, it can effectively prevent sand and gravel in the mud from damaging the entire control system.

[0016] Specifically, in a preferred embodiment, the slurry mixing water supply valve, the slurry mixing water discharge valve, the material feeding water supply valve, the material feeding water discharge valve and the connecting valve are all explosion-proof and pressure-resistant electric wafer butterfly valves.

[0017] Using explosion-proof and pressure-resistant electric wafer butterfly valve as the control valve can greatly improve the stability, reliability and safety performance of the entire control system.

[0018] Specifically, in a preferred embodiment, the liquid mixing pump is a liquid mixing variable frequency electric pump.

[0019] By adjusting the preset speed and running time of the slurry mixing electric pump, the effect of uniform mixing can be achieved.

[0020] Specifically, in a preferred embodiment, the electronic control system has a built-in PIC control program.

[0021] The electronic control system controls the opening and closing of each valve on the circulation tank very conveniently through the PIC program, thereby realizing the feeding and liquid mixing functions of multiple tanks.

[0022] The second aspect of the present invention is a control method for feeding and mixing multiple tanks for drilling, which is implemented using the control system described above. When the electronic control system determines that the feeding tank is to be fed, the electronic control system controls the closing of the connecting valve and the slurry water supply valve on the feeding tank, opens the feeding water supply valve and the feeding drain valve on the feeding tank, and starts the feeding pump.

[0023] Furthermore, in a preferred embodiment, when the electronic control system determines that the slurry in the feeding tank is mixed into the liquid mixing tank, the electronic control system presets the mixing time and volume and then controls the closing of the connecting valve and the feeding water valve on the feeding tank, opens the slurry drain valve on the liquid mixing tank, the slurry water valve and the slurry drain valve on the feeding tank, and starts the liquid mixing pump.

[0024] Obviously, due to the adoption of the above-mentioned control system for multi-tank feeding and mixing of drilling materials, the control method for multi-tank feeding and mixing of drilling materials according to the present invention controls the different valves on the circulation tank, which can effectively realize the multi-tank slurry matching and liquid mixing functions. The electronic control system performs functional settings for slurry matching, liquid mixing mode, liquid mixing volume and time. On the one hand, it promotes the intelligence of drilling engineering equipment, and on the other hand, it reduces the workload of operators, ensures safe operation, a high degree of automation, and improves work efficiency. At the same time, it can prevent the underground complexity and liquid overflow pollution caused by misoperation of the staff.

[0025] Compared with the existing technology, the advantages of the present invention are: the use of an intelligent control system to control the different valves on the circulation tank body can effectively realize the functions of multi-tank slurry and liquid mixing, and the electronic control system sets the functions of slurry mixing, liquid mixing method, liquid mixing volume and time. On the one hand, it promotes the intelligence of drilling engineering equipment, and on the other hand, it reduces the workload of operators, ensures safe operation, high degree of automation, and improves work efficiency. At the same time, it can prevent the underground complexity and liquid overflow pollution caused by staff misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0027] Figure 1 and Figure 2The schematic diagram shows the framework structure principle of the control system 10 during feeding according to an embodiment of the present invention;

[0028] Figure 3 and Figure 4 The schematic diagram shows the framework structure principle of the control system 10 during liquid mixing according to an embodiment of the present invention.

[0029] In the drawings, like parts are given like reference numerals, but the drawings are not necessarily drawn to scale. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0031] Figure 1 and Figure 2 The schematic diagram shows the framework structure principle of the control system 10 during material addition according to the embodiment of the present invention. Figure 3 and Figure 4 The schematic diagram shows the framework structure principle of the control system 10 of the embodiment of the present invention when mixing liquids. Indicates the closed state of the butterfly valve; Indicates the open state of the butterfly valve.

[0032] Example 1

[0033] like Figures 1 to 4 As shown, a control system 10 for multi-tank feeding and mixing of drilling liquids according to an embodiment of the present invention comprises a feeding tank 1, a mixing liquid tank 2, a feeding pump 3, a mixing liquid pump 4 and an electronic control system 5, wherein the feeding tank 1 is provided with a slurry water supply valve 11, a slurry water discharge valve 12, a feeding water supply valve 13 and a feeding water discharge valve 14, the mixing liquid tank 2 is provided with a slurry water discharge valve 21, the mixing liquid pump 4 is connected to the slurry water supply valve 11 and the slurry water discharge valve 12 through a connecting pipeline 8, and the feeding pump 3 is connected to the slurry water supply valve 11 and the slurry water discharge valve 12 through a connecting pipeline 8. 3 are respectively connected to the feeding water valve 13 and the feeding water discharge valve 1 through the connecting pipeline 8. The feeding water valve 13 on the feeding tank body 1 is connected to the mixing liquid tank body 2 through the connecting valve 6. The mixing liquid tank body 2 is connected to the mud source. A circulating pump 101 is provided at the outlet of the mixing liquid tank body 2. The electronic control system 5 is respectively electrically connected to the slurry mixing water valve 11, the slurry mixing water discharge valves 12 and 21, the feeding water valve 13, the feeding water discharge valve 14, the connecting valve 6, the feeding pump 3 and the mixing liquid pump 4 through the cable 9.

[0034] According to the control system for multi-tank feeding and liquid mixing for drilling according to the embodiment of the present invention, an intelligent control system is used to control different valves on the circulation tank, which can effectively realize the functions of multi-tank slurry matching and liquid mixing. The electronic control system performs functional settings for slurry matching, liquid mixing mode, liquid mixing volume and time. On the one hand, it promotes the intelligence of drilling engineering equipment, and on the other hand, it reduces the workload of operators, ensures safe operation, a high degree of automation, and improves work efficiency. At the same time, it can prevent the underground complexity and liquid overflow pollution caused by misoperation of the staff.

[0035] like Figures 1 to 4 As shown, further, in this embodiment, the feeding tank body 1 includes at least two groups, and the feeding water valves 13 on each group of the feeding tank body 1 are interconnected, and are connected to the mixing tank body 2 through the connecting valve 6. By setting up multiple groups of feeding tank bodies, it is possible to control any one group of tank bodies to mix slurry and mix liquid according to actual needs through the electronic control system, or to control multiple groups of tank bodies to mix slurry and mix liquid at the same time, thereby greatly improving the applicability of the entire control system. Further, in this embodiment, the mixing tank body 2 includes at least two groups, and each group of the mixing tank bodies 2 are interconnected. By setting up multiple groups of mixing tank bodies, it is possible to control any one group of mixing tank bodies to mix liquid according to actual needs through the electronic control system, and the remaining mixing tank bodies can play a good buffering role in the circulation process, improve the stability and reliability of the system, thereby greatly improving the applicability of the entire control system.

[0036] like Figures 1 to 4 As shown, further, in this embodiment, the control system 10 for multi-tank feeding and liquid mixing for drilling also includes a solid control tank 7 connected to the wellhead mud source and the liquid mixing tank 2 respectively, and a vibrating screen and a sand removal device are provided in the solid control tank 7. The mud circulated from the wellhead passes through the vibrating screen and the sand removal device in the solid control tank, which can effectively filter the mud and avoid affecting the stability and reliability of the entire control system during the mud circulation process. Furthermore, in this embodiment, the solid control tank 7 includes at least two groups, and the solid control tank 7 is provided with at least two levels of sand removal equipment. By providing multiple groups of solid control tanks and sand removal equipment, on the one hand, it can play a good buffering role in the mud circulation process to ensure the stability of the entire control system, and on the other hand, it can effectively prevent sand and gravel in the mud from damaging the entire control system.

[0037] Specifically, in this embodiment, the slurry feed valve 11, slurry drain valves 12 and 21, material feed valve 13, material drain valve 14, and communication valve 6 are all explosion-proof and pressure-resistant electric wafer butterfly valves. Using explosion-proof and pressure-resistant electric wafer butterfly valves as control valves can greatly improve the stability, reliability, and safety performance of the entire control system.

[0038] Specifically, in this embodiment, the liquid mixing pump 4 is a variable-frequency electric mixing pump. By adjusting the preset speed and operating time of the electric mixing pump, a uniform liquid mixing effect can be achieved. Specifically, in this embodiment, the electronic control system 5 includes a built-in PIC control program. This PIC program conveniently controls the opening and closing of the valves on the circulation tanks, thereby enabling multi-tank feeding and liquid mixing functions.

[0039] Example 2

[0040] The control method for multi-tank feeding and liquid mixing for drilling according to an embodiment of the present invention is implemented using the control system 10 described above. When the electronic control system 5 determines that the feeding tank 1 is to be fed, the electronic control system 5 controls the closing of the connecting valve and the slurry water supply valve on the feeding tank, opens the feeding water supply valve and the feeding drain valve on the feeding tank, and starts the feeding pump. Furthermore, in this embodiment, when the electronic control system determines that the slurry in the feeding tank is to be mixed into the liquid mixing tank, the electronic control system presets the slurry mixing time and volume, and controls the closing of the connecting valve and the feeding water supply valve on the feeding tank, opens the slurry drain valve on the mixing tank, the slurry water supply valve and the slurry drain valve on the mixing tank, and starts the liquid mixing pump.

[0041] Obviously, due to the adoption of the above-mentioned control system for multi-tank feeding and mixing of drilling materials, the control method for multi-tank feeding and mixing of drilling materials according to the present invention controls the different valves on the circulation tank, which can effectively realize the multi-tank slurry matching and liquid mixing functions. The electronic control system performs functional settings for slurry matching, liquid mixing mode, liquid mixing volume and time. On the one hand, it promotes the intelligence of drilling engineering equipment, and on the other hand, it reduces the workload of operators, ensures safe operation, a high degree of automation, and improves work efficiency. At the same time, it can prevent the underground complexity and liquid overflow pollution caused by misoperation of the staff.

[0042] The control method for multi-tank feeding and liquid mixing for drilling according to an embodiment of the present invention is specifically as follows, wherein the solid control tanks include two, the liquid mixing tanks 2 include two, and the feeding tanks 1 include two:

[0043] like Figure 1 As shown, when it is confirmed that the first feeding tank body 1 is started to be fed, the electronic control system 5 will first automatically close the connecting valve 6, the feeding water valve 13 of the second feeding tank body 1, the feeding drain valve 14 of the second feeding tank body 1, the slurry feeding valve 11 of the first feeding tank body 1, and the slurry feeding valve 11 of the second feeding tank body 1, open the feeding water valve 13 of the first feeding tank body 1, the feeding drain valve 14 of the first feeding tank body 1, and then start the feeding pump 3.

[0044] like Figure 2As shown, when it is confirmed that the second feeding tank body 1 is started to feed, the electronic control system 5 will first automatically close the connecting valve 6, the feeding water valve 13 of the first feeding tank body 1, the feeding drain valve 14 of the first feeding tank body 1, the slurry mixing water valve 11 of the first feeding tank body 1, and the slurry mixing water valve 11 of the second feeding tank body 1, open the feeding water valve 13 of the second feeding tank body 1, the feeding drain valve 14 of the second feeding tank body 1, and then start the feeding pump 3.

[0045] like Figure 3 As shown, when it is confirmed that the liquid in the first feeding tank body 1 is mixed into the first mixing tank body 2 and the total time and volume are set, the electronic control system 5 will automatically close the connecting valve 6, the feeding water supply valve 13 of the first feeding tank body 1, the feeding water supply valve 13 of the second feeding tank body 1, the slurry water supply valve 11 of the second feeding tank body 1, and the slurry drain valve 12 of the second feeding tank body 1, open the slurry drain valve 21 of the first mixing tank body 2, the slurry drain valve 12 of the first feeding tank body 1, and then start the mixing pump 4.

[0046] like Figure 4 As shown, when it is confirmed that the liquid of the second feeding tank body 1 is mixed into the first mixing tank body 2 and the total time and volume are set, the electronic control system 5 will automatically close the connecting valve 6, the slurry drain valve 12 of the first feeding tank body 1, the feeding water supply valve 13 of the first feeding tank body 1, the feeding water supply valve 13 of the second feeding tank body 1, and the slurry water supply valve 11 of the first feeding tank body 1, open the slurry water supply valve 11 of the second feeding tank body 1, the slurry drain valve 21 of the first mixing tank body 2, and the slurry drain valve 12 of the second feeding tank body 1, and then start the mixing pump 4.

[0047] According to the above embodiments, it can be seen that the control system and method for multi-tank feeding and liquid mixing for drilling involved in the present invention adopt an intelligent control system to control different valves on the circulation tank, which can effectively realize the functions of multi-tank slurry matching and liquid mixing. The electronic control system performs functional settings for slurry matching, liquid mixing mode, liquid mixing volume and time. On the one hand, it promotes the intelligence of drilling engineering equipment, and on the other hand, it reduces the workload of operators, ensures safe operation, has a high degree of automation, and improves work efficiency. At the same time, it can prevent the underground complexity and liquid overflow pollution caused by misoperation of the staff.

[0048] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A control method for multi-tank feeding and mixing in drilling, characterized in that: The control method is implemented by a control system for multi-tank feeding and liquid mixing in drilling, wherein the control system includes a feeding tank, a liquid mixing tank, a feeding pump, a liquid mixing pump and an electronic control system; wherein, The feeding tank body is provided with a slurry mixing water supply valve, a slurry mixing water discharge valve, a feeding water supply valve and a feeding water discharge valve, and the mixing tank body is provided with a slurry mixing water discharge valve; The mixing liquid pump is connected to the slurry mixing water supply valve and the slurry mixing water discharge valve respectively, and the feeding pump is connected to the feeding water supply valve and the feeding water discharge valve respectively; The feeding water valve on the feeding tank body is connected to the mixing tank body through a connecting valve, the mixing tank body is connected to the mud source, and a circulating pump is provided at the outlet of the mixing tank body; The electronic control system is electrically connected to the slurry mixing water supply valve, the slurry mixing water discharge valve, the feed water supply valve, the feed water discharge valve, the connecting valve, the feed pump and the liquid mixing pump respectively; The feeding tanks include at least two groups, and the feeding and water supply valves on each group of the feeding tanks are connected to each other and connected to the mixing tank through a connecting valve; The liquid mixing tanks include at least two groups, and the liquid mixing tanks in each group are connected to each other; The control method includes: when the electronic control system determines that the feeding tank is to be fed, the electronic control system controls the closing of the communication valve and the slurry feed valve on the feeding tank, opens the feeding feed valve and the feeding drain valve on the feeding tank, and starts the feeding pump; When it is confirmed that the first feeding tank is to be charged, the electronic control system will automatically close the connecting valve, the feeding water valve of the second feeding tank, the feeding drain valve of the second feeding tank, the slurry mixing water valve of the first feeding tank, and the slurry mixing water valve of the second feeding tank, open the feeding water valve of the first feeding tank and the feeding drain valve of the first feeding tank, and then start the feeding pump; When it is confirmed that the second feeding tank is started to be fed, the electronic control system will automatically close the connecting valve, the feeding water valve of the first feeding tank, the feeding drain valve of the first feeding tank, the slurry mixing water valve of the first feeding tank, and the slurry mixing water valve of the second feeding tank, open the feeding water valve of the second feeding tank and the feeding drain valve of the second feeding tank, and then start the feeding pump; After confirming that the liquid in the first feeding tank is mixed into the first liquid mixing tank and the total time and volume are set, the electronic control system will automatically close the connecting valve, the feeding water valve of the first feeding tank, the feeding water valve of the second feeding tank, the slurry mixing water valve of the second feeding tank, and the slurry mixing drain valve of the second feeding tank, open the slurry mixing drain valve of the first liquid mixing tank and the slurry mixing drain valve of the first feeding tank, and then start the liquid mixing pump; When it is confirmed that the liquid from the second feeding tank is mixed into the first mixing tank and the total time and volume are set, the electronic control system will automatically close the connecting valve, the slurry drain valve of the first feeding tank, the feeding water supply valve of the first feeding tank, the feeding water supply valve of the second feeding tank, and the slurry water supply valve of the first feeding tank, open the slurry water supply valve of the second feeding tank, the slurry drain valve of the first mixing tank, and the slurry drain valve of the second feeding tank, and then start the mixing pump.

2. The method for controlling multi-tank feeding and liquid mixing for drilling according to claim 1, characterized in that: It also includes a solid control tank body connected to the wellhead mud source and the mixed liquid tank body respectively, and a vibrating screen and sand removal equipment are arranged in the solid control tank body.

3. The method for controlling multi-tank feeding and liquid mixing for drilling according to claim 2, characterized in that: The solid control tanks include at least two groups, and at least two levels of sand removal equipment are provided in the solid control tanks.

4. The method for controlling multi-tank feeding and liquid mixing for drilling according to claim 1, characterized in that: The slurry mixing water supply valve, the slurry mixing water discharge valve, the material feeding water supply valve, the material feeding water discharge valve and the connecting valve are all explosion-proof and pressure-resistant electric wafer butterfly valves.

5. The method for controlling multi-tank feeding and liquid mixing for drilling according to claim 1, characterized in that: The liquid mixing pump is a liquid mixing variable frequency electric pump.

6. The method for controlling multi-tank feeding and liquid mixing for drilling according to claim 1, characterized in that: The electronic control system has a built-in PIC control program.

7. The method for controlling multi-tank feeding and liquid mixing for drilling according to claim 1, characterized in that: When the electronic control system determines that the slurry in the feeding tank is mixed into the liquid mixing tank, the electronic control system presets the mixing time and volume and controls the closing of the connecting valve and the feeding water valve on the feeding tank, opens the slurry drain valve on the liquid mixing tank, the slurry water valve and the slurry drain valve on the feeding tank, and starts the liquid mixing pump.

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