Self-cleaning slurry circulation tank for petroleum drilling

Abstract

The utility model discloses a self-cleaning type slurry circulating tank for petroleum drilling, which comprises a slurry circulating tank body, and a sand pump pressurizing and stirring device and a sand removing device are assembled on the slurry circulating tank body; the sand pump pressurizing and stirring device comprises a water feeding pipeline, a pressurizing sand pump and a water discharging pipeline which are connected in sequence, a water feeding opening of the water feeding pipeline is located in the slurry circulating tank body, and the water discharging pipeline is distributed on the inclined tank body bottom surface in the slurry circulating tank body; a plurality of hydraulic stirrers are assembled on a water outlet of the water drainage pipeline; the desanding device comprises an auger type desanding mechanism and a sand discharging pipe, the auger type desanding mechanism comprises a desanding pump and a spiral auger in power connection with the desanding pump, and the spiral auger is located at the lower end of the bottom face of the inclined tank body. According to the utility model, the settled sand in the slurry circulating tank can be automatically cleaned in the drilling construction process. The mud circulating tank cleaning device is suitable for cleaning the mud circulating tank in drilling construction. The device can also be used for cleaning liquid medicines and slurry settled sand in other industries.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling mud circulation tanks, and particularly relates to a self-cleaning mud circulation tank for oil drilling. Background Art

[0002] During the later stage of drilling operations, it is necessary to clean the mud in the mud circulation tank. Due to the sedimentation of the solid phase components in the mud under the action of gravity, especially during the process of tank inversion and long-term static settlement, the heavy phase in the mud will precipitate, and the sedimentation thickness is very large, resulting in the inability to open the side door of the mud circulation tank. Even if it can be opened, there are potential environmental pollution hazards when cleaning the sand deposits through the side door.

[0003] When cleaning the remaining mud and sand deposits in the existing mud circulation tank body, it is difficult to suck the mud out with an ordinary pump. It is necessary for workers to enter from the top of the mud circulation tank, shovel the cuttings with a shovel, load them into containers one by one and then pull them out manually. Since the mud materials have undergone complex reactions after circulating at the bottom of the well, there may be toxic and harmful gases such as hydrogen sulfide and sulfur dioxide with a density heavier than air accumulating in the mud circulation tank, which poses a great safety hazard to the personnel entering the mud circulation tank. At the same time, the personnel entering the bottom of the tank are at risk of slipping, electric shock and mechanical injury, making the workers in the tank operate in a limited space with high intensity, high load and high risk. Summary of the Utility Model

[0004] To solve the above deficiencies in the prior art, the utility model aims to provide a self-cleaning mud circulation tank for oil drilling, so as to achieve the purpose of automatically cleaning the sand deposits in the mud circulation tank during the drilling construction process.

[0005] To achieve the above object, the technical solution adopted by the utility model is as follows: A self-cleaning mud circulation tank for oil drilling, including a mud circulation tank body, on which a sand pump booster stirring device and a sand removal device are assembled;

[0006] The sand pump booster stirring device includes a water supply pipeline, a booster sand pump and a drainage pipeline connected in sequence. The water inlet of the water supply pipeline is located inside the mud circulation tank body, and the drainage pipeline is distributed on the inclined tank bottom surface inside the mud circulation tank body; a plurality of hydraulic agitators for stirring the sand deposits in the mud circulation tank are assembled on the drainage outlet of the drainage pipeline.

[0007] The sand removal device includes a screw-type sand removal mechanism and a sand discharge pipe assembled at the output port of the screw-type sand removal mechanism. The screw-type sand removal mechanism includes a sand removal pump and a spiral auger power-connected to the sand removal pump. The spiral auger is located at the lower end of the inclined tank bottom surface of the mud circulation tank body, and the sand discharge port of the sand discharge pipe is located outside the mud circulation tank body.

[0008] As a limitation of the present utility model, the water inlet of the water supply pipeline is located in the middle of the mud circulation tank body, and a filter screen for filtering solid phases is assembled in the water supply pipeline.

[0009] As a further limitation of the present utility model, the booster sand pump is assembled outside the mud circulation tank body through a pump base.

[0010] As another limitation of the present utility model, the drainage pipeline includes a main pipeline connected to the booster sand pump and multiple rows of branch pipelines communicated with the main pipeline. The branch pipelines are evenly arranged on the inclined bottom surface of the mud circulation tank body, and multiple hydraulic agitators are assembled on the drainage outlets of the branch pipelines.

[0011] As a further limitation of the present utility model, the sand discharge port of the sand discharge pipe is located above the sand inlet of the mud non - landing treatment unit.

[0012] As other limitations of the present utility model, one end of the spiral auger is connected to the desanding pump, and the other end is connected to a bearing assembled on the mud circulation tank body.

[0013] Due to the adoption of the above - mentioned technical solution, compared with the prior art, the beneficial effects obtained by the present utility model are as follows:

[0014] The present utility model can realize the automatic cleaning of the sediment in the circulation tank during drilling construction. That is, the sand pump booster stirring device sucks the mud in the mud circulation tank body, and after filtering, forms high - pressure liquid through the booster sand pump to drive the agitator to stir the mud in the tank. At the same time, the inclined bottom surface of the mud circulation tank body provides a downward angle for the sediment to enter the spiral auger, and then the desanding pump outputs the mud outward. The present utility model does not require special personnel to clean the mud in the tank in the later stage of construction, without manual labor, enabling the sand cleaning operation to be synchronized with the normal drilling operation, greatly reducing the input cost and having significant economic benefits; and the mud in the tank is stirred evenly and thoroughly, making the performance of the output mud stable. The present utility model has good practical usability, operability and popularization, increasing the production selectivity of the enterprise.

[0015] The present utility model is applicable to the cleaning of the mud circulation tank during drilling construction for automatically cleaning the sediment in the circulation tank. The present utility model can also be used for the cleaning work of liquid medicines and mud sediment in other industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model;

[0018] Figure 2Schematic diagram of the inclined bottom surface inside the mud circulation tank body of the embodiment of the present utility model (the booster sand pump is omitted);

[0019] Figure 3 Schematic diagram of the position of the branch pipeline and the main pipeline of the embodiment of the present utility model (the inclined bottom surface of the tank body is omitted);

[0020] Figure 4 Schematic diagram of the position of the sand discharge pipe of the embodiment of the present utility model.

[0021] In the figure: 1, water inlet pipeline; 2, booster sand pump; 3, main pipeline; 4, mud circulation tank body; 5, hydraulic stirrer; 6, spiral auger; 7, sand removal pump; 8, sand discharge pipe; 9, branch pipeline; 10, outer cylinder; 11, inclined bottom surface of the tank body; 12, auger type sand removal mechanism. Specific implementation mode

[0022] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and understanding the present utility model, and are not used to limit the present utility model.

[0023] Embodiment: A self-cleaning mud circulation tank for oil drilling

[0024] As Figures 1 to 4 shown, this embodiment includes a mud circulation tank body 4, the bottom surface inside the mud circulation tank body 4 is an inclined surface, and an outer cylinder 10 for accommodating a spiral auger 6 is hermetically fixed on the outer shell of the mud circulation tank body 4. A sand pump booster stirring device and a sand removal device are assembled on the mud circulation tank body 4.

[0025] The sand pump boosting and stirring device includes a water inlet pipeline 1, a boosting sand pump 2, and a drainage pipeline that are connected in sequence. The input port of the boosting sand pump 2 is connected to the water inlet pipeline 1, and the output port of the boosting sand pump 2 is connected to the drainage pipeline. The water inlet of the water inlet pipeline 1 is located in the middle of the mud circulation tank body 4. A filter screen for filtering sand is installed in the water inlet pipeline 1, so that the mud entering the water inlet pipeline 1 from the mud circulation tank body 4 is filtered and the clean liquid is input into the boosting sand pump 2. The boosting sand pump 2 is assembled outside the mud circulation tank body 4 through a pump base, and the boosting sand pump 2 outputs high-pressure liquid into the drainage pipeline. The drainage pipeline includes a main pipeline 3 connected to the output port of the boosting sand pump 2 and multiple rows of branch pipelines 9 communicated with the output port of the main pipeline 3. The branch pipelines 9 are horizontally and evenly arranged on the inclined tank bottom surface 11 inside the mud circulation tank body 4. A plurality of hydraulic stirrers 5 are installed on the drainage ports of the branch pipelines 9. The high-pressure liquid discharged from the branch pipelines 9 enters the hydraulic stirrers 5, providing power for the rotation of the hydraulic stirrers 5, so that the hydraulic stirrers 5 uniformly stir the liquid in the mud circulation tank body 4 and promote the stability of the mud performance. The main pipeline 3 and the branch pipelines 9 are hidden below the inclined tank bottom surface 11 inside the mud circulation tank body 4, so that the hydraulic stirrers 5 protrude relative to the inclined tank bottom surface 11. Refer to Figure 2 as shown.

[0026] The sand removal device includes a screw-type sand removal mechanism 12 and a sand discharge pipe 8 assembled at the output port of the screw-type sand removal mechanism. The screw-type sand removal mechanism includes a sand removal pump 7 and a spiral screw 6 that is power-connected to the sand removal pump 7. The spiral screw 6 is located at the low end of the inclined tank bottom surface of the mud circulation tank body 4 and can make the sediment descending along the inclined tank bottom surface 11 fall into the spiral screw 6. An outer cylinder 10 covers the spiral screw 6. One end of the spiral screw 6 is connected to a bearing for straightening the spiral screw 6, and the bearing is fixedly installed on the inclined tank bottom surface 11; the other end of the spiral screw 6 is power-connected to the sand removal pump 7 through a coupling. The sand removal pump 7 (extracting and boosting sand pump) provides rotational power for the spiral screw 6. The sediment enters the short blade impeller cavity of the sand removal pump 7 through the output of the spiral screw 6. The output port of the sand removal pump 7 is connected to the sand discharge pipe 8, and the sand discharge port of the sand discharge pipe 8 is located outside the mud circulation tank body 4 and above the mud non-landing treatment unit, so that the discharged mortar falls into the mud non-landing treatment unit.

[0027] When using this embodiment, the mud in the mud circulation tank body 4 enters the boosting sand pump 2 after being filtered by the filter screen in the water inlet pipeline 1. The boosting sand pump 2 inputs high-pressure liquid into the drainage pipeline, and provides rotational power to the hydraulic stirrers 5 through the drainage pipeline. The sediment slides into the spiral screw 6 along the inclined tank bottom surface 11 under the stirring of the hydraulic stirrers 5. The sediment is conveyed by the spiral screw 6 and enters the short blade impeller cavity of the sand removal pump 7, and then is output outward through the sand discharge port of the sand discharge pipe 8 by the output port of the sand removal pump 7 to the mud non-landing treatment unit.

[0028] It should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A self-cleaning mud circulation tank for oil drilling, comprising a mud circulation tank body, characterized in that: The mud circulation tank is equipped with a sand pump booster stirring device and a sand removal device; The sand pump booster stirring device comprises a water supply pipeline, a booster sand pump and a drainage pipeline which are connected in sequence. The water supply port of the water supply pipeline is located inside the mud circulation tank, and the drainage pipeline is distributed on the inclined tank bottom surface inside the mud circulation tank; the drainage port of the drainage pipeline is equipped with a plurality of hydraulic agitators for stirring the sand settled in the mud circulation tank; The sand removal device includes an auger-type sand removal mechanism and a sand discharge pipe installed at the output port of the auger-type sand removal mechanism. The auger-type sand removal mechanism includes a sand removal pump and a spiral auger connected to the power of the sand removal pump. The spiral auger is located on the lower end of the bottom surface of the inclined tank body of the mud circulation tank, and the sand discharge port of the sand discharge pipe is located outside the mud circulation tank body.

2. The self-cleaning mud circulation tank for oil drilling according to claim 1 is characterized in that: The water inlet of the water supply pipeline is located in the middle of the mud circulation tank, and a filter screen for filtering the solid phase is installed in the water supply pipeline.

3. The self-cleaning mud circulation tank for oil drilling according to claim 2 is characterized in that: The booster sand pump is assembled on the outside of the mud circulation tank through a pump seat.

4. The self-cleaning mud circulation tank for oil drilling according to any one of claims 1 to 3, characterized in that: The drainage pipeline includes a main pipeline connected to the booster sand pump and multiple rows of branch pipelines connected to the main pipeline. The branch pipelines are evenly arranged on the inclined tank bottom surface of the mud circulation tank, and multiple hydraulic agitators are installed on the drainage outlets of the branch pipelines.

5. The self-cleaning mud circulation tank for oil drilling according to claim 4 is characterized in that: The sand discharge port of the sand discharge pipe is located above the sand inlet of the mud non-ground treatment unit.

6. The self-cleaning mud circulation tank for oil drilling according to claim 5, characterized in that: One end of the spiral auger is connected to the desanding pump, and the other end is connected to the bearing assembled on the mud circulation tank.

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