Geological drilling mud treatment system

Abstract

The utility model provides a geological drilling slurry treatment system, which is characterized in that a first treatment module, a second treatment module, a third treatment module and a fourth treatment module are arranged in the system, and solid particles with different sizes in slurry are sequentially removed by utilizing the stage treatment effect of each module on the slurry; according to the method, drilling slag and mud cakes with coarse, medium and fine particle sizes can be obtained through screening, subsequent optimization of different resource utilization modes is facilitated, the treatment efficiency of the mud is effectively improved through the process, recycling of effective components in the mud can be achieved, and an effective implementation mode is provided for cyclic utilization of the mud. By means of the mode, the geological drilling mud treatment system is simple in structure, easy to operate and high in separation treatment efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of geological drilling mud treatment, in particular to a geological drilling mud treatment system. Background Art

[0002] Drilling fluid is called the "blood" of drilling. It is a circulating fluid that meets the needs of drilling projects. It is indispensable in the exploration and development of geological resources. With the acceleration of geological drilling operations, the waste mud, drill cuttings and other wastes generated by drilling have also increased, becoming one of the problems that trouble people. These drilling waste products are not only expensive to handle, but also cause serious environmental pollution if not handled in a timely and effective manner. It has become a problem that needs to be solved urgently.

[0003] In the prior art, the mud treatment method recorded in the Chinese patent application document with application number 202311707914.7, publication date February 27, 2024, and invention name "A Mud Treatment System and Method" includes two steps: treatment of circulating mud and treatment of waste mud. Although this method can achieve effective treatment of mud, the treatment system of the treatment process is complex in composition and large in size, which invisibly increases the cost of the mud treatment process.

[0004] In addition, the drilling mud on-site treatment system disclosed in the Chinese patent announcement document with application number 202311288713.8, publication date November 10, 2023, and invention name "A drilling mud on-site treatment system and method" divides the interior of the traditional waste oil tank into two chambers, one of which is negative pressure degassing, which solves the problem of waste oil tanks in the prior art that alkane gas easily escapes, improves the treatment efficiency of oily sludge, reduces uncontrollable carbon emissions, etc. The invention is suitable for the field of oily sludge drilling. The above-mentioned prior art has the following main deficiencies: (1) The treatment system occupies a large area; (2) The separated solid phase particles have a high water content and are difficult to transport.

[0005] In view of this, it is necessary to design an improved geological drilling mud processing system to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a geological drilling mud processing system.

[0007] In order to achieve the above-mentioned utility model purpose, the utility model provides a geological drilling mud processing system, including:

[0008] Mud pool, which is used to store geological drilling mud;

[0009] A circulation processing module, whose head end is connected to one side of the mud pool and the tail end is connected to the other side of the mud pool; the circulation processing module comprises a first processing module, a second processing module, a third processing module and a fourth processing module connected in sequence; one end of the first processing module is connected to the mud pool, and the other end is connected to the second processing module; one end of the fourth processing module is connected to the third processing module, and the other end is connected to the mud pool.

[0010] Furthermore, the first processing module includes a slurry pump, a vibrating screen and a first liquid storage tank which are sequentially arranged between the mud pool and the second processing module, and adjacent structures among the mud pool, the slurry pump, the vibrating screen and the first liquid storage tank are interconnected by a first pipeline.

[0011] Furthermore, the second processing module includes a first sand pump, a desander, a first dehydrator and a second liquid storage tank which are arranged in sequence, the first sand pump is connected to the first liquid storage tank in the first processing module, and the adjacent structures in the first liquid storage tank, the first sand pump, the desander, the first dehydrator and the second liquid storage tank are interconnected through a second pipeline.

[0012] Furthermore, the third processing module includes a second sand pump, a desilter, a second dewatering machine and a third liquid storage tank which are arranged in sequence, the second sand pump is connected to the second liquid storage tank in the second processing module, and the adjacent structures in the second liquid storage tank, the second sand pump, the desilter, the second dewatering machine and the third liquid storage tank are interconnected through a third pipe.

[0013] Furthermore, the fourth processing module includes a feeding mechanism, a third sand pump and a third dehydrator which are arranged in sequence, one end of the feeding mechanism is connected to the third liquid storage tank, and the other end is connected to the third sand pump, and the adjacent structures among the third liquid storage tank, the feeding mechanism, the third sand pump and the third dehydrator are connected through a fourth pipeline.

[0014] Furthermore, a first valve is provided on the pipeline between the slurry pump and the vibrating screen, and the first valve is used to regulate the amount of mud entering the vibrating screen and the flow rate of the mud.

[0015] Furthermore, a second valve is provided between the first sand pump and the desander.

[0016] Furthermore, a third valve is provided between the second sand pump and the desilter.

[0017] Furthermore, a fourth valve is provided between the third sand pump and the third dehydrator.

[0018] Furthermore, the first liquid storage tank is a flat tapered structure or a corrugated structure.

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

[0020] 1. The geological drilling mud processing system provided by the utility model sets a first processing module, a second processing module, a third processing module and a fourth processing module in the system, utilizes the graded processing effect of each module on the mud, removes solid particles of different sizes in the mud in turn, and can screen out coarse, medium and fine particle size drilling cuttings and mud cakes, which is convenient for subsequent optimization of different resource utilization methods. The above process not only effectively improves the processing efficiency of the mud, but also can realize the recycling of effective components in the mud, and provides an effective implementation method for the recycling of the mud.

[0021] 2. The geological drilling mud processing system provided by the utility model adopts a modular design method, and different modules can be selected according to the mud properties, thereby realizing efficient processing of the mud and timely recovering the usable mud during the processing process, effectively improving the construction speed, saving a lot of mud and project cycle costs, and having a significant gain effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of the geological drilling mud processing system provided by the utility model;

[0023] The reference numerals are as follows:

[0024] 100. Geological drilling mud processing system; 10. Mud pool; 20. Slurry pump; 21. Vibrating screen; 22. First liquid storage tank; 30. First sand pump; 31. Desander; 32. First dehydrator; 33. Second liquid storage tank; 40. Second sand pump; 41. Desilter; 42. Second dehydrator; 43. Third liquid storage tank; 50. Feeding mechanism; 51. Third sand pump; 52. Third dehydrator. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0027] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0028] See also Figure 1 As shown, the geological drilling mud processing system 100 provided by the utility model includes:

[0029] A mud pool 10, which is used to store geological drilling mud;

[0030] A circulation processing module, whose head end is connected to one side of the mud pool 10, and the tail end is connected to the other side of the mud pool 10; the circulation processing module includes a first processing module, a second processing module, a third processing module and a fourth processing module connected in sequence; one end of the first processing module is connected to the mud pool 10, and the other end is connected to the second processing module, one end of the third processing module is connected to the fourth processing module, and the other end is connected to the second processing module, one end of the fourth processing module is connected to the third processing module, and the other end is connected to the mud pool 10.

[0031] Specifically, the first processing module includes a slurry pump 20, a vibrating screen 21 and a first liquid storage tank 22 which are sequentially arranged between the mud pool 10 and the second processing module. The adjacent structures in the mud pool 10, the slurry pump 20, the vibrating screen 21 and the first liquid storage tank 22 are interconnected by a first pipeline (not numbered in the figure). The slurry pump 20 is used to provide power for the transportation of the mud. The vibrating screen 21 is used to filter the large-particle solid-phase drill cuttings (particle size>400μm) in the mud. The treated mud is stored in the first liquid storage tank 22, which is a flat conical structure or a corrugated structure welded by steel plates and steel sections. When the treated mud in the first liquid storage tank 22 can meet the requirements of the engineering construction, it continues to be recycled, otherwise it flows into the second processing module for treatment. In particular, in order to better control the processing efficiency of the mud in the first pipeline on the vibrating screen 21, a first valve can be set on the pipeline between the slurry pump 20 and the vibrating screen 21 to facilitate the regulation of the amount of mud entering the vibrating screen 21 and the flow rate of the mud.

[0032] Furthermore, the second processing module includes a first sand pump 30, a desander 31, a first dehydrator 32 and a second liquid storage tank 33 which are arranged in sequence. The first sand pump 30 is connected to the first liquid storage tank 22 in the first processing module. The first liquid storage tank 22, the first sand pump 30, the desander 31, the first dehydrator 32 and the second liquid storage tank 33 are interconnected through a second pipeline (not numbered in the figure). The first sand pump 30 is used to provide power for the process of transporting mud from the first liquid storage tank 22 to the desander 31. A second valve is provided between the first sand pump 30 and the desander 31. The desander 31 is used to filter medium-grained solid drill cuttings (with a particle size of about 60-400 μm) in the mud from the first liquid storage tank 22. The treated mud flows into the second liquid storage tank 33, and the solid drill cuttings are sent to the first dehydrator 32 for dehydration treatment. When the treated mud in the second liquid storage tank 33 can meet the requirements of the engineering construction, it continues to be recycled, otherwise it flows into the third processing module for treatment. In particular, in order to facilitate the transportation of solid phase materials, the first dehydrator 32 is arranged directly below the desander 31 .

[0033] Furthermore, the third processing module includes a second sand pump 40, a desilter 41, a second dehydrator 42 and a third liquid storage tank 43 which are arranged in sequence. The second sand pump 40 is connected to the second liquid storage tank 33 in the second processing module. The second liquid storage tank 33, the second sand pump 40, the desilter 41, the second dehydrator 42 and the third liquid storage tank 43 are interconnected through a third pipeline (not numbered in the figure). The desilter 41 is used to filter fine particles of solid phase cuttings (particle size 10-60 μm) in the mud. The treated mud flows into the third liquid storage tank 43, and the solid phase particles are sent to the second dehydrator. The second sand pump 40 is used to dehydrate the drill cuttings in the desilter 42 to obtain drier drill cuttings for easy transportation. At the same time, a third valve is provided between the second sand pump 40 and the desilter 41. The third liquid storage tank 43 is used to store the treated mud. Its structure is the same as that of the second liquid storage tank 33 and will not be repeated here. The second sand pump 40 is used to provide power for the process of transporting the mud in the second liquid storage tank 33 to the desilter 41. The desilter 41 is used to separate mud and water. When the mud in the third liquid storage tank 43 meets the requirements of the engineering construction, it can continue to be recycled. Otherwise, it is regarded as waste mud and is collected in the fourth processing module for waste treatment. In particular, in order to facilitate the transportation of solid phase materials, the first dehydrator 32 is set directly below the desilter 31, and the second dehydrator 42 is set directly below the desilter 41.

[0034] Furthermore, the fourth processing module includes a feeding mechanism 50, a third sand pump 51 and a third dewatering machine 52 which are arranged in sequence. One end of the feeding mechanism 50 is connected to the third liquid storage tank 43, and the other end is connected to the third sand pump 51. The adjacent structures in the third liquid storage tank 43, the feeding mechanism 50, the third sand pump 51 and the third dewatering machine 52 are connected by a fourth pipeline (not numbered in the figure). The feeding mechanism 50 is used to add chemical reagents to the mud to promote mud-water separation of the mud, which is beneficial to the subsequent effective separation of solid and liquid components in the mud. A fourth valve is provided between the third sand pump 51 and the third dewatering machine 52. One end of the third dewatering machine 52 is connected to the third sand pump 51, and the other end is connected to the mud pool 10. After the waste mud is treated, waste liquid and mud cake are obtained. The mud cake is transported out for treatment, and the waste liquid is used to re-prepare the waste mud.

[0035] The geological drilling mud processing system proposed by the utility model is further described below in conjunction with specific embodiments:

[0036] Example 1

[0037] This embodiment provides a geological drilling mud processing system 100, including:

[0038] A mud pool 10, which is used to store geological drilling mud;

[0039] The circulation processing module has its head end connected to one side of the mud pool 10 and its tail end connected to the other side of the mud pool 10; the circulation processing module includes a first processing module, a second processing module, a third processing module and a fourth processing module which are connected in sequence.

[0040] Specifically, the first processing module includes a slurry pump 20, a vibrating screen 21 and a first liquid storage tank 22 which are sequentially arranged between the mud pool 10 and the second processing module. The adjacent structures in the mud pool 10, the slurry pump 20, the vibrating screen 21 and the first liquid storage tank 22 are interconnected by a first pipeline. The slurry pump 20 is used to provide power for the transportation of the mud. The vibrating screen 21 is used to filter the large-particle solid-phase drill cuttings (particle size> 400 μm) in the mud. The treated mud is stored in the first liquid storage tank 22, which is a flat conical structure welded by steel plates and steel sections. When the treated mud in the first liquid storage tank 22 can meet the requirements of the engineering construction, it will continue to be recycled, otherwise it will flow into the second processing module for treatment. In particular, in order to better control the processing efficiency of the mud in the first pipeline on the vibrating screen 21, a first valve can be set on the pipeline between the slurry pump 20 and the vibrating screen 21 to facilitate the regulation of the amount of mud entering the vibrating screen 21 and the flow rate of the mud. The slurry pump 20 in this embodiment is a SB×4C sand pump with a power of 30KW, and the vibrating screen 21 is a ZS series vibrating screen with a processing capacity of 120-240m 3 / h, the effective volume of the first liquid storage tank 22 is 20m3 In other embodiments, the performance parameters of the slurry pump 20, the vibrating screen 21 and the first liquid storage tank 22 may also be selected as needed, which is not limited here.

[0041] Furthermore, the second processing module includes a first sand pump 30, a desander 31, a first dewatering machine 32 and a second liquid storage tank 33 which are arranged in sequence. The first sand pump 30 is connected to the first liquid storage tank 22 in the first processing module. The first liquid storage tank 22, the first sand pump 30, the desander 31, the first dewatering machine 32 and the second liquid storage tank 33 are interconnected through a second pipeline. The first sand pump 30 is used to provide power for the process of transporting mud from the first liquid storage tank 22 to the desander 31. A second valve is provided between the first sand pump 30 and the desander 31. The desander 31 is used to filter medium-grained solid drill cuttings (with a particle size of about 60-400 μm) in the mud from the first liquid storage tank 22. The treated mud flows into the second liquid storage tank 33, and the solid drill cuttings are sent to the first dewatering machine 32 for dehydration treatment. When the treated mud in the second liquid storage tank 33 can meet the requirements of the engineering construction, it continues to be recycled, otherwise it flows into the third processing module for treatment. The first sand pump 30 is of SB×4C type with a power of 30KW; the desander 31 is of ZJ series with a processing capacity of 120-240m 3 / h; the first dehydrator 32 uses a ZS752 model vibrating screen (number of screens> 2), and the effective volume of the second liquid storage tank 33 is 20m 3 In other embodiments, the performance parameters of the first sand pump 30, the desander 31, the first dehydrator 32 and the second liquid storage tank 33 may also be selected as needed, which is not limited here.

[0042] Furthermore, the third processing module includes a second sand pump 40, a desilter 41, a second dehydrator 42 and a third liquid storage tank 43 which are arranged in sequence. The second sand pump 40 is connected to the second liquid storage tank 33 in the second processing module. The second liquid storage tank 33, the second sand pump 40, the desilter 41, the second dehydrator 42 and the third liquid storage tank 43 are interconnected through a third pipeline. The desilter 41 is used to filter fine particles of solid-phase drilling cuttings (particle size 10-60 μm) in the mud. The treated mud flows into the third liquid storage tank 43, and the solid-phase particles are sent to the second dehydrator 42. Dehydration is carried out to obtain relatively dry drill cuttings; at the same time, a third valve is provided between the second sand pump 40 and the desilter 41. The third liquid storage tank 43 is used to store the treated mud. Its structure is the same as that of the second liquid storage tank 33 and will not be repeated here. The second sand pump 40 is used to provide power for the process of transporting the mud in the second liquid storage tank 33 to the desilter 41. The desilter 41 is used to separate mud and water; when the mud in the third liquid storage tank 43 meets the requirements of the engineering construction, it can continue to be recycled, otherwise it is regarded as waste mud and is collected in the fourth processing module for waste treatment. In particular, in order to facilitate the transportation of solid phase materials, the first dehydrator 32 is arranged directly below the desilter 31, and the second dehydrator 42 is arranged directly below the desilter 41. Among them, the model of the second sand pump 40 is SB×4C, and its power is 30KW; the desilter 41 uses the ZJ series desilter 41, and its processing capacity is 120-240m 3 / h; the second dehydrator 42 uses a ZS752 model vibrating screen (number of screens> 2), and the effective volume of the third liquid storage tank 43 is 20m 3 In other embodiments, the performance parameters of the second sand pump 40, the desilter 41, the second dehydrator 42 and the third liquid storage tank 43 may also be selected as needed, which is not limited here.

[0043] Furthermore, the fourth processing module includes a feeding mechanism 50, a third sand pump 51 and a third dewatering machine 52 which are arranged in sequence. One end of the feeding mechanism 50 is connected to the third liquid storage tank 43, and the other end is connected to the third sand pump 51. The adjacent structures in the third liquid storage tank 43, the feeding mechanism 50, the third sand pump 51 and the third dewatering machine 52 are connected through a fourth pipeline. A fourth valve is provided between the third sand pump 51 and the third dewatering machine 52. One end of the third dewatering machine 52 is connected to the third sand pump 51, and the other end is connected to the mud pool 10. After the waste mud is treated, waste liquid and mud cake are obtained. The mud cake is transported out for treatment, and the waste liquid is used to re-prepare the waste mud. Among them, the model of the third sand pump 51 is SB×4C, and its power is 30KW; the third dehydrator 52 is a WL530 horizontal screw centrifuge, and the drum speed is 2000r / min. In other embodiments, the performance parameters of the third sand pump 51 and the third dehydrator 52 can also be selected according to needs, which is not limited here.

[0044] Furthermore, this embodiment also provides a method for treating mud using the geological drilling mud treatment system 100, and the specific method is as follows:

[0045] First, the slurry pump 20 is turned on to transport the mud in the mud pool 10 to the vibrating screen 21. The large-particle drill cuttings in the mud are filtered by the vibrating screen 21 to obtain purified mud and large-particle drill cuttings. The purified mud is collected in the first liquid storage tank 22. When the treated mud in the first liquid storage tank 22 can meet the requirements of the engineering construction, it will continue to be recycled. Otherwise, it will flow into the second processing module for processing;

[0046] Next, under the action of the first sand pump 30, the mud in the first liquid storage tank 22 that does not meet the engineering construction requirements is transported to the desander 31. The desander 31 can be used to screen the medium-fine particle solid-phase drill cuttings in the mud to obtain purified mud and medium-particle drill cuttings. The purified mud is collected in the second liquid storage tank 33, and the solid-phase drill cuttings are sent to the first dehydrator 32 for dehydration treatment. When the treated mud in the second liquid storage tank 33 can meet the engineering construction requirements, it will continue to be recycled, otherwise it will flow into the third processing module for treatment;

[0047] Then, the second sand pump 40 extracts the mud that does not meet the engineering construction requirements after being processed by the second processing module from the second liquid storage tank 33 and sends it to the desilter 41. The desilter 41 can screen the fine-grained solid-phase drill cuttings in the mud to obtain purified mud and fine-grained mud residue. When the mud in the third liquid storage tank 43 meets the engineering construction requirements, it can continue to be recycled. Otherwise, it is regarded as waste mud and is collected in the fourth processing module for waste treatment.

[0048] Finally, the third sand pump 51 transports the mud that does not meet the construction requirements in the third liquid storage tank 43 to the third dewatering machine 52, and at the same time adds polyacrylamide flocculants, ammonium chloride, baking soda and other chemical agents to the feeding mechanism 50, and the waste mud is quickly separated from the water. Under the action of the third dewatering machine 52, it is deeply dehydrated to obtain waste liquid and mud cake; the waste liquid flows into the mud pool 10, and chemical agents such as carboxymethyl cellulose (CMC) or sodium carbonate are added to re-prepare the engineering mud, and the mud cake is transported out for treatment, so that the separation and recycling of geological drilling mud can be achieved.

[0049] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A geological drilling mud processing system, characterized in that: include; Mud pool, which is used to store geological drilling mud; A circulation processing module, the head end of which is connected to one side of the mud pool, and the tail end is connected to the other side of the mud pool; the circulation processing module comprises a first processing module, a second processing module, a third processing module and a fourth processing module which are connected in sequence; one end of the first processing module is connected to the mud pool, and the other end is connected to the second processing module; one end of the fourth processing module is connected to the third processing module, and the other end is connected to the mud pool; The first processing module comprises a slurry pump, a vibrating screen and a first liquid storage tank which are sequentially arranged between the mud pool and the second processing module, and adjacent structures among the mud pool, the slurry pump, the vibrating screen and the first liquid storage tank are connected to each other through a first pipeline; The second processing module comprises a first sand pump, a desander, a first dehydrator and a second liquid storage tank which are arranged in sequence, the first sand pump is connected to the first liquid storage tank in the first processing module, and the adjacent structures among the first liquid storage tank, the first sand pump, the desander, the first dehydrator and the second liquid storage tank are connected to each other through a second pipeline; The third processing module comprises a second sand pump, a desilter, a second dehydrator and a third liquid storage tank which are arranged in sequence, the second sand pump is connected to the second liquid storage tank in the second processing module, and the adjacent structures among the second liquid storage tank, the second sand pump, the desilter, the second dehydrator and the third liquid storage tank are connected to each other through a third pipeline; The fourth processing module includes a feeding mechanism, a third sand pump and a third dehydrator which are arranged in sequence, one end of the feeding mechanism is connected to the third liquid storage tank, and the other end is connected to the third sand pump, and the adjacent structures among the third liquid storage tank, the feeding mechanism, the third sand pump and the third dehydrator are connected through a fourth pipeline.

2. The geological drilling mud processing system according to claim 1, characterized in that: A first valve is provided on the pipeline between the slurry pump and the vibrating screen, and the first valve is used to regulate the amount of mud entering the vibrating screen and the flow rate of the mud.

3. The geological drilling mud processing system according to claim 1, characterized in that: A second valve is provided between the first sand pump and the desander.

4. The geological drilling mud processing system according to claim 1, characterized in that: A third valve is provided between the second sand pump and the desilter.

5. The geological drilling mud processing system according to claim 1, characterized in that: A fourth valve is provided between the third sand pump and the third dehydrator.

6. The geological drilling mud processing system according to claim 1, characterized in that: The first liquid storage tank is a flat tapered structure or a corrugated structure.

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