Automatic separating and cleaning device for drilling cuttings

Abstract

The utility model discloses an automatic separating and cleaning device for drilling cuttings, which comprises a cleaning box, a cleaning cylinder and a separating and cleaning mechanism arranged in the cleaning cylinder, and the cleaning cylinder is vertically inserted into the cleaning box until the bottom of the cleaning cylinder is fixed at the bottom of the cleaning box. The top of the cleaning cylinder is exposed out of the cleaning box and connected with a cover plate, and a conveying pipe communicating with the cleaning cylinder penetrates through the cover plate. A water outlet pipe is installed at the bottom of the separating and cleaning mechanism, one end of the water outlet pipe is connected with the separating and cleaning mechanism, and the other end of the water outlet pipe penetrates through the cleaning box and then is connected with a water outlet of the water pump. The separation and cleaning work of the rock debris can be completed through one set of equipment, a large amount of electric energy does not need to be consumed in the whole process, only a part of electric energy needs to be consumed when cleaning liquid is conveyed through the water pump, compared with traditional centrifugal separation, the overall power consumption is greatly reduced, and the electric energy loss in the rock debris cleaning and separating process can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield equipment, and particularly relates to an automatic separation and cleaning device for drilling cuttings. Background Art

[0002] During the oil and gas drilling process, the drilling fluid carries the cuttings back to the ground. Since the drilling fluid has certain corrosiveness, it is necessary to separate the cuttings from the drilling fluid, and then clean the cuttings. After removing the drilling fluid on the surface of the cuttings, the cuttings can be further processed.

[0003] For example, the patent with the application number 202120641357.3 discloses an automatic separation and cleaning device for drilling cuttings, which includes a support frame. A rotating drum is arranged on the support frame. A support skeleton is arranged outside the rotating drum. A filter screen is arranged between the support skeleton and the rotating drum. Two chambers, an upper chamber and a lower chamber, are arranged outside the support skeleton. The upper chamber is a filtrate chamber, and the lower chamber is a cleaning liquid chamber. A drilling fluid inlet and a cleaning liquid inlet are arranged above the rotating drum. The mixed cuttings drilling fluid enters the conical rotating drum. The cuttings and the mud liquid are separated under the action of centrifugal force. The size of the cuttings particles is controlled according to the pore size of the filter screen. The separated mud liquid enters the filtrate chamber and is discharged through the rotating scraper. The cuttings move downward through the spiral scraper of the rotating drum. Cleaning liquid is introduced to clean the cuttings. Then, through centrifugal force, the cleaned cleaning liquid enters the cleaning liquid chamber and is discharged. The cleaning liquid can be reused after simple treatment. The cuttings after cleaning are discharged from the lower cuttings outlet. The separation and cleaning operation of the drilling fluid and the cuttings is simple, convenient and reliable, and is suitable for popularization and use.

[0004] However, the above separation and cleaning device and similar devices consume a large amount of electric energy when driving the rotating drum to rotate at high speed during use, and the overall cost is relatively high, so improvements are needed. Summary of the Invention

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art, and provide an automatic separation and cleaning device for drilling cuttings that can complete the separation and cleaning work simultaneously.

[0006] To achieve the above purpose, the utility model provides an automatic separation and cleaning device for drilling cuttings, which includes a cleaning box, a cleaning cylinder and a separation and cleaning mechanism arranged in the cleaning cylinder. The cleaning cylinder is vertically inserted into the cleaning box until the bottom of the cleaning cylinder is fixed at the bottom of the cleaning box. The top of the cleaning cylinder is exposed outside the cleaning box, and a cover plate is connected to the top of the cleaning cylinder. A conveying pipe communicating with the cleaning cylinder penetrates through the cover plate. A drain pipe is installed at the bottom of the cleaning box. A water outlet pipe is installed at the bottom of the separation and cleaning mechanism. One end of the water outlet pipe is connected to the separation and cleaning mechanism, and the other end of the water outlet pipe passes through the cleaning box and is connected to the water outlet of the water pump. The water inlet end of the water pump is externally connected to a water source.

[0007] Further, the separation and cleaning mechanism includes a partition plate located in the middle of the cleaning cylinder, a support ring supported on the inner wall of the cleaning cylinder and directly below the partition plate, a guide pipe passing through and fixed to the through hole in the middle of the support ring, a connecting device for connecting the partition plate and the support ring, and a guide post. The edge of the partition plate is fixedly connected to the inner wall of the cleaning cylinder, and the edge of the support ring is supported on the inner wall of the cleaning cylinder; the guide post sequentially passes through the partition plate and the guide pipe in the middle of the support ring until the bottom of the guide post is fixed to the bottom of the cleaning box; water outlet holes are formed in the cylinder wall of the cleaning cylinder and above the partition plate, and a plurality of radial through holes are formed in the pipe wall of the guide pipe.

[0008] Further, there are multiple connecting devices and they are evenly arranged along the circumferential direction of the guide post; each connecting device includes a connecting rod, a bottom plate, a top plate, a water guide pipe, and a buffer device. The connecting rod is fixed to the upper surface of the support ring, the bottom plate is fixed to the top of the connecting rod, the top plate is located above the upper surface of the partition plate, the water guide pipe passes through the through hole in the partition plate, the bottom of the water guide pipe is fixed to the bottom plate, the top of the water guide pipe is fixed to the top plate, and a plurality of drain holes are formed in both the upper and lower parts of the pipe wall of the water guide pipe.

[0009] Further, there are multiple buffer devices and they are evenly arranged along the circumferential direction of the water guide pipe. Each buffer device includes a buffer pipe fixed to the lower surface of the partition plate, a buffer rod, and a second spring. The top of the buffer rod is inserted into the buffer pipe, the bottom of the buffer rod is fixed to the bottom plate, the second spring is sleeved on the buffer rod, and the upper end of the second spring is fixed to the buffer pipe and the lower end is fixed to the bottom plate.

[0010] Further, an elastic water bag is arranged at the bottom of the cleaning cylinder. The bottom of the guide pipe is inserted into the elastic water bag and is sealed and connected. The bottom of the guide post passes through the guide pipe and then is inserted into the elastic water bag. The top of the elastic water bag is fixed to the support ring, and one end of the water outlet pipe passes through the bottom of the cleaning cylinder and extends into the elastic water bag. A first spring is sleeved on the guide post located in the elastic water bag. The upper end of the first spring is fixed to the bottom of the guide pipe, and the lower end of the first spring is fixed to the guide post.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: With a set of equipment, the present utility model can complete the separation and cleaning work of cuttings, and the whole process does not require a large amount of electric energy consumption. Only a part of the electric energy is consumed for the water pump to transport the cleaning liquid. Compared with the traditional centrifugal separation, the overall power consumption is greatly reduced. The present utility model can effectively reduce the electric energy loss during the cleaning and separation process of cuttings, is conducive to popularization, and has a high cost performance. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the present utility model;

[0013] Figure 2 is Figure 1 an enlarged schematic view of part A of

[0014] Figure 3 is Figure 1 an enlarged schematic view of part B of

[0015] Figure 4 is Figure 3 an enlarged schematic view of part C of

[0016] Reference numerals: cover plate 1, conveying pipe 2, cleaning cylinder 3, limiting disc 4, water outlet pipe 6, water pump 7, first spring 8, guide post 9, cleaning tank 10, drain pipe 11, water outlet hole 12, top plate 13, water guide pipe 14, partition plate 15, radial through hole 16, guide pipe 17, connecting rod 18, elastic water bag 19, support ring 20, bottom plate 21, second spring 22, buffer pipe 23, drain hole 25, buffer rod 26. Specific embodiments

[0017] The present invention will be further described in detail below in conjunction with specific embodiments, which is convenient for a clearer understanding of the present invention, but they do not constitute a limitation to the present invention.

[0018] As Figures 1 to 4 shown, the automatic separation and cleaning device for drilling cuttings includes a cleaning tank 10 (the cleaning tank 10 is made of stainless steel), a cleaning cylinder 3 and a separation and cleaning mechanism. The cleaning cylinder 3 is vertically inserted into the cleaning tank 10 until the bottom of the cleaning cylinder 3 is fixed at the bottom of the cleaning tank 10. The top of the cleaning cylinder 3 is exposed outside the cleaning tank 10 and a detachable cover plate 1 is connected to the top of the cleaning cylinder 3. A conveying pipe 2 communicating with the cleaning cylinder 3 penetrates through the cover plate 1; a drain pipe 11 is installed at the bottom of the cleaning tank 10, and a water outlet pipe 6 is installed at the bottom of the separation and cleaning mechanism. One end of the water outlet pipe 6 is connected to the separation and cleaning mechanism, and the other end of the water outlet pipe 6 passes through the cleaning tank 10 and is connected to the water outlet of the water pump 7. The water inlet end of the water pump 7 is externally connected to a water source.

[0019] The separation and cleaning mechanism is arranged in the cleaning cylinder 3. The separation and cleaning mechanism includes a partition plate 15 located in the middle of the cleaning cylinder 3, a support ring 20 supported on the inner wall of the cleaning cylinder 3 and located directly below the partition plate 15, a guide pipe 17 penetrating and fixed in the central through hole of the support ring 20, a connecting device for connecting the partition plate 15 and the support ring 20, and a guide post 9. The edge of the partition plate 15 is fixedly connected to the inner wall of the cleaning cylinder 3, and the edge of the support ring 20 is supported on the inner wall of the cleaning cylinder; the guide post 9 sequentially passes through the partition plate 15 and the guide pipe 17 in the middle of the support ring 20 until the bottom of the guide post 9 is fixed at the bottom of the cleaning tank 10, and a limiting disc 4 is installed at the top of the guide post 9; a water outlet hole 12 is opened on the barrel wall of the cleaning cylinder 3 and above the partition plate 15, and a plurality of radial through holes 16 are opened on the pipe wall of the guide pipe 17.

[0020] There are multiple connecting devices which are evenly arranged along the circumferential direction of the guiding column 9. Each connecting device includes a connecting rod 18, a bottom plate 21, a top plate 13, a water guide pipe 14 and a buffer device. The connecting rod 18 is fixed on the upper surface of the support ring 20. The bottom plate 21 is fixed on the top of the connecting rod 18. The top plate 13 is located above the upper surface of the partition plate 15. The water guide pipe 14 passes through the through hole of the partition plate 15. The bottom of the water guide pipe 14 is fixed on the bottom plate 21, and the top of the water guide pipe 14 is fixed on the top plate 13. A plurality of drain holes 25 are formed in both the upper and lower parts of the pipe wall of the water guide pipe 14. There are multiple buffer devices which are evenly arranged along the circumferential direction of the water guide pipe 14. Each buffer device includes a buffer pipe 23, a buffer rod 26 and a second spring 22 fixed on the lower surface of the partition plate 15. The top of the buffer rod 26 is inserted into the buffer pipe 23. The bottom of the buffer rod 26 is fixed on the bottom plate 21. The second spring 22 is sleeved on the buffer rod 26, and the upper end of the second spring 22 is fixed on the buffer pipe 23 and the lower end is fixed on the bottom plate 21.

[0021] An elastic water bag 19 is arranged at the bottom of the cleaning cylinder 3. The bottom of the guiding pipe 17 is inserted into the elastic water bag 19 and sealedly connected. The bottom of the guiding column 9 passes through the guiding pipe 17 and then is inserted into the elastic water bag 19. The top of the elastic water bag 19 is fixed on the support ring 20. One end of the water outlet pipe 6 passes through the bottom of the cleaning cylinder 3 and extends into the elastic water bag 19. A first spring 8 is sleeved on the guiding column 9 located in the elastic water bag 19. The upper end of the first spring 8 is fixed to the bottom of the guiding pipe 17, and the lower end of the first spring 8 is fixed on the guiding column 9. The first spring 8 plays a buffering role.

[0022] Working principle: The mixture of cuttings, mud and drilling fluid is transported to the cleaning cylinder 3 through the conveying pipe 2. The mud and drilling fluid are discharged into the cleaning box 10 through the water outlet holes 12, and then discharged to the outside through the drain pipe 11 on the cleaning box 10. The cuttings are retained in the cleaning cylinder 3. The cleaning liquid is transported into the elastic water bag 19 in the cleaning cylinder 3 through the water pump 7 and the water outlet pipe 6, so that the elastic water bag 19 is filled with water and expands. The expanded elastic water bag 19 jacks up the support ring 20. The support ring 20 drives the water guide pipe 14 to rise through the connecting rod 18, so that the drain holes 25 at the top of the water guide pipe 14 rise synchronously above the partition plate 15 and are no longer blocked by the partition plate 15. At the same time, the water in the elastic water bag 19 is discharged above the support ring 20 through the radial through holes 16 of the guiding pipe 17, then enters the water guide pipe 14 through the drain holes 25 below the water guide pipe 14, and then enters above the partition plate 15 through the drain holes 25 above, so as to wash the cuttings above the partition plate 15. After washing, the cuttings are discharged into the cleaning box 10 through the water outlet holes 12 and then discharged through the drain pipe 11.

[0023] The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic separation and cleaning device for drilling cuttings, characterized in that: It includes a cleaning tank (10), a cleaning cylinder (3) and a separation and cleaning mechanism arranged inside the cleaning cylinder (3). The cleaning cylinder (3) is vertically inserted into the cleaning tank (10) until the bottom of the cleaning cylinder (3) is fixed to the bottom of the cleaning tank (10). The top of the cleaning cylinder (3) is exposed outside the cleaning tank (10), and a cover plate (1) is connected to the top of the cleaning cylinder (3). A conveying pipe (2) communicating with the cleaning cylinder (3) penetrates through the cover plate (1). A drain pipe (11) is installed at the bottom of the cleaning tank (10). An outlet pipe (6) is installed at the bottom of the separation and cleaning mechanism. One end of the outlet pipe (6) is connected to the separation and cleaning mechanism, and the other end of the outlet pipe (6) passes through the cleaning tank (10) and is connected to the outlet of a water pump (7). The separation and cleaning mechanism includes a partition plate (15) located in the middle of the cleaning cylinder (3), a support ring (20) supported on the inner wall of the cleaning cylinder (3) and located directly below the partition plate (15), a guide pipe (17) penetrating and fixed in the central through hole of the support ring (20), a connecting device for connecting the partition plate (15) and the support ring (20), and a guide post (9). The edge of the partition plate (15) is fixedly connected to the inner wall of the cleaning cylinder (3), and the edge of the support ring (20) is supported on the inner wall of the cleaning cylinder. The guide post (9) sequentially passes through the guide pipe (17) in the middle of the partition plate (15) and the support ring (20) until the bottom of the guide post (9) is fixed to the bottom of the cleaning tank (10). Water outlet holes (12) are opened on the cylinder wall of the cleaning cylinder (3) and above the partition plate (15). A number of radial through holes (16) are opened on the pipe wall of the guide pipe (17).

2. The automatic separation and cleaning device for drilling cuttings according to claim 1, wherein: There are multiple connecting devices and they are evenly arranged along the circumferential direction of the guide post (9). Each connecting device includes a connecting rod (18), a bottom plate (21), a top plate (13), a water guide pipe (14) and a buffer device. The connecting rod (18) is fixed on the upper surface of the support ring (20). The bottom plate (21) is fixed on the top of the connecting rod (18). The top plate (13) is located above the upper surface of the partition plate (15). The water guide pipe (14) passes through the through hole of the partition plate (15). The bottom of the water guide pipe (14) is fixed on the bottom plate (21), and the top of the water guide pipe (14) is fixed on the top plate (13). A number of drain holes (25) are opened on both the upper and lower parts of the pipe wall of the water guide pipe (14).

3. The automatic separation and cleaning device for drilling cuttings according to claim 2, wherein: There are multiple buffer devices and they are evenly arranged along the circumferential direction of the water guide pipe (14). Each buffer device includes a buffer pipe (23) fixed on the lower surface of the partition plate (15), a buffer rod (26) and a second spring (22). The top of the buffer rod (26) is inserted into the buffer pipe (23). The bottom of the buffer rod (26) is fixed on the bottom plate (21). The second spring (22) is sleeved on the buffer rod (26), and the upper end of the second spring (22) is fixed on the buffer pipe (23) and the lower end is fixed on the bottom plate (21).

4. The automatic separation and cleaning device for drilling cuttings according to claim 1, wherein: An elastic water bag (19) is arranged at the bottom of the cleaning cylinder (3). The bottom of the guiding pipe (17) is inserted into the elastic water bag (19) and sealedly connected. The bottom of the guiding column (9) passes through the guiding pipe (17) and then is inserted into the elastic water bag (19). The top of the elastic water bag (19) is fixed on the supporting ring (20). One end of the water outlet pipe (6) passes through the bottom of the cleaning cylinder (3) and extends into the elastic water bag (19). A first spring (8) is sleeved on the guiding column (9) located in the elastic water bag (19). The upper end of the first spring (8) is fixed to the bottom of the guiding pipe (17), and the lower end of the first spring (8) is fixed on the guiding column (9).

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