Drilling mud circulation environmental protection system

Abstract

The utility model relates to a drilling mud circulation environment-friendly system which comprises three open boxes, a sleeve, a protective pipe, a protective cap and two sets of connecting assemblies. One end of the sleeve is arranged in the drill hole, and the other end is provided with a protective pipe and a protective cap and vertically connected to the bottom of the first open box; the three open boxes are horizontally connected through two sets of connecting assemblies, and each connecting assembly is sequentially composed of a filter screen, a water outlet pipe, a valve and a water inlet pipe according to the circulation sequence of slurry. The drilling mud circulation environment-friendly system is simple in structure, can be flexibly mounted and dismounted, and can be repeatedly used; the slurry and the flushing fluid can be recycled and reused, so that the device is economical and environment-friendly; mud pits do not need to be excavated, limitation of site conditions is avoided, and the method is universally applicable to various construction environments; the slurry is isolated from the ground, so that the problem of pollution to surrounding vegetation and environment caused by slurry leakage and excavation of a slurry pit is solved, and the field working surface can be kept clean and tidy.

Description

Technical Field

[0001] The utility model relates to the field of mud circulation systems, and particularly to an environmental protection system for drilling mud circulation. Background Art

[0002] With the rapid economic development and the improvement of people's living standards, engineering construction has shown characteristics such as large project quantities and fast construction speeds. Geotechnical engineering investigation is an essential procedure in engineering construction, and drilling construction is an important field investigation method among them. During the drilling construction process, excessive heat is generated due to the friction between the drill bit and the soil layer or rock formation. In order to cool the drill bit, lubricate the drilling tool, protect the hole wall, and discharge the rock and soil debris generated during drilling, it is necessary to establish a mud circulation between the drill hole and the mud pit during the drilling of the drill rig to achieve the continuous flow of mud in the drill hole.

[0003] Traditional mud circulation systems mostly adopt the method of digging a mud pit after drilling through the surface ground or surrounding the mud pit with clay bags. The mud discharged during drilling is discharged into the mud pit through a pipeline. The mud and slag in the mud settle at the bottom of the pit, and the upper clear slurry is pumped away by a mud pump and pressed into the drill hole again as a flushing fluid, and so on in a cycle.

[0004] With the improvement of social development level, on the basis of the previous requirements for project quality and safety, contemporary society has put forward higher requirements for the construction process from the perspectives of environmental protection, humanization, etc. Especially for urban construction and water operations, there are very strict requirements for noise, dust, and the discharge of construction waste generated during the construction process. The above traditional mud circulation system has a greater impact on the ground, is prone to mud leakage, pollutes and damages the surrounding environment, and the mud is difficult to recycle and is difficult to handle. Obviously, it is difficult to meet the environmental protection requirements of urban civilized construction and water drilling operations; in addition, when drilling in special areas such as concrete hardened roads and waters in urban areas, there are also problems such as the inability to dig or difficult excavation of mud pits. Content of the Utility Model

[0005] In order to solve the technical problems existing in the prior art, the utility model provides an environmental protection system for drilling mud circulation, which has a simple structure, can be flexibly installed and disassembled, can recycle mud, and is applicable to various construction environments.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] An environmental protection system for drilling mud circulation includes three open boxes, a casing, a protective tube, a protective cap, and two sets of connecting components. The casing is arranged vertically, one end of the casing is arranged in a pre-drilled hole, and the other end of the casing is connected to the bottom of the first open box through the protective tube and the protective cap. The first open box is connected to the second open box through a set of connecting components, and the second open box is connected to the third open box through another set of connecting components.

[0008] As a preferred technical solution, the first open box is a drill cuttings collection chamber, the second open box is a mud circulation chamber, and the third open box is a flushing fluid discharge chamber.

[0009] As a preferred technical solution, the connection assembly includes: a filter screen, a water outlet pipe, a valve, and a water inlet pipe arranged in sequence according to the mud flow order, and the system controls the mud flow rate through the valve.

[0010] As a preferred technical solution, connection installation grooves are provided on one side of each of the three open boxes adjacent to the other open boxes, and the filter screens and water inlet pipes of the two connection assemblies are respectively inserted into the corresponding connection installation grooves.

[0011] As a preferred technical solution, a collection installation groove is provided at the bottom of the first open box, and the casing is connected to the collection installation groove through a protective pipe and a protective cap.

[0012] As a preferred technical solution, the interior of the third open box is communicated with a mud pump, and the mud pump is connected to the drill hole.

[0013] As a preferred technical solution, handles are provided at the edges of the three open boxes.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The drilling mud circulation environmental protection system of the present utility model has a simple structure, is easy to install, can be reused, can realize the replacement of a single component, and is convenient for sustainable use of resources; there is no need to excavate a mud pit, which can avoid affecting the ground and is applicable to most construction environments, such as municipal roads, water drilling operations, etc.; the mud undergoes two-stage sedimentation and filtration, and the sediment and clear slurry are in different boxes, which can effectively prevent the sediment from blocking the mud pump and improve work efficiency; the mud flows in a closed loop throughout the process, which can effectively prevent slurry leakage, and the clear slurry after sedimentation and filtration can be recycled, meeting the higher environmental protection requirements for urban and water drilling construction and being conducive to environmental protection. Brief Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the drilling mud circulation environmental protection system of the present utility model.

[0017] In the figure: 1. Casing; 2. Protective pipe; 3. The first open box; 4. Protective cap; 5. Filter screen; 6. Water outlet pipe; 7. Valve; 8. Water inlet pipe; 9. The second open box; 10. The third open box. Detailed Embodiments

[0018] The technical solutions of the present utility model will be further described below in conjunction with the detailed embodiments:

[0019] As shown in the figure, a drilling mud circulation environmental protection system includes three open-top boxes 3 / 9 / 10, a casing 1, a protective pipe 2, a protective cap 4, and two sets of connection components. The casing 1 is vertically arranged, one end of the casing 1 is arranged in a pre-drilled hole, and the other end of the casing 1 is connected to the bottom of the first open-top box 3 through the protective pipe 2 and the protective cap 4. The first open-top box 3 is connected to the second open-top box 9 through a set of connection components, and the second open-top box 9 is connected to the third open-top box 10 through another set of connection components. Any of the above components can be replaced in case of damage, so as to effectively extend the service life of this drilling mud circulation environmental protection system.

[0020] The first open-top box 3 is a drill cuttings collection chamber, the second open-top box 9 is a mud circulation chamber, and the third open-top box 10 is a flushing fluid discharge chamber. The main function of the first open-top box 3 is to collect drill cuttings and preliminarily precipitate mud; the main function of the second open-top box 9 is for mud circulation and secondary precipitation of mud; the main function of the third open-top box 10 is to discharge the flushing fluid. The inside of the third open-top box 10 is connected to a mud pump, and the mud pump is connected to the drill hole. The clear slurry after two precipitations and filtrations is used as the flushing fluid and is pressed into the drill hole through the mud pump in the third open-top box 10, realizing the circulating flow of the mud.

[0021] The connection components include: a filter screen 5, a water outlet pipe 6, a valve 7, and a water inlet pipe 8 arranged in sequence according to the mud flow order. Connection installation grooves are provided on one side of each of the three open-top boxes 3 / 9 / 10 adjacent to other open-top boxes. The filter screen 5 end of the connection component is inserted into the installation groove on the side wall of the upstream open-top box, and the water inlet pipe 8 end is inserted into the installation groove of the downstream open-top box. The valve 7 can open and close by itself to change the mud flow rate and circulation path.

[0022] A collection installation groove is provided at the bottom of the first open-top box 3, and the casing 1 is connected to the collection installation groove through the protective pipe 2 and the protective cap 4.

[0023] In this embodiment, the mud generated during drilling is discharged into the first open-top box 3 through the casing 1, and after preliminary precipitation, the first filtration is completed through the filter screen 5 of a set of connection components. The filtered mud enters the second open-top box 9 through the water outlet pipe 6, the valve 7, and the water inlet pipe 8. The mud undergoes secondary precipitation in the second open-top box 9, and then the second filtration is completed through the filter screen 5 of another set of connection components. The filtered mud flows into the third open-top box 10 through the water outlet pipe 6, the valve 7, and the water inlet pipe 8 of another set of connection components. Finally, the clear slurry in the third open-top box 10 is used as the flushing fluid and is pressed into the drill hole by the mud pump, thus realizing the repeated circulation of the mud between the drill hole and the mud pit.

[0024] Handles are provided at the edges of the three open-top boxes 3 / 9 / 10, which is convenient for moving when changing the construction site.

[0025] This embodiment is only a further explanation of the present utility model and not a limitation thereof. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

Claims

1. A drilling mud circulation environmental protection system, characterized in that: The invention comprises three open boxes, a casing, a protective tube, a protective cap and two groups of connection components. The casing is arranged vertically, one end of the casing is arranged in a pre-drilled hole, the other end of the casing is connected to the bottom of the first open box through the protective tube and the protective cap, the first open box is connected to the second open box through one group of connection components, and the second open box is connected to the third open box through another group of connection components.

2. The drilling mud circulation environmental protection system according to claim 1, characterized in that: The first open box is a cuttings collection chamber, the second open box is a mud circulation chamber, and the third open box is a flushing liquid discharge chamber.

3. The drilling mud circulation environmental protection system according to claim 1, characterized in that: The connection assembly comprises: a filter screen, a water outlet pipe, a valve and a water inlet pipe which are arranged in sequence according to the mud flow sequence, and the system controls the mud flow rate through the valve.

4. The drilling mud circulation environmental protection system according to claim 3, characterized in that: A connecting installation groove is provided on one side of each open box adjacent to each other, and the filter screens and water inlet pipes of the two groups of connecting components are respectively plugged into the corresponding connecting installation grooves.

5. The drilling mud circulation environmental protection system according to claim 1, characterized in that: The bottom of the first open box is provided with a collecting installation groove, and the sleeve is connected with the collecting installation groove through a protective tube and a protective cap.

6. The drilling mud circulation environmental protection system according to claim 1, characterized in that: The interior of the third open box is communicated with a mud pump, and the mud pump is connected to the borehole.

7. The drilling mud circulation environmental protection system according to claim 1, characterized in that: The three open boxes have handles on the edges.

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