Slurry circulating system

Abstract

The utility model discloses a slurry circulating system, which relates to the technical field of well drilling corollary equipment and comprises a first tank, a water feeding tank, a weighting pump, a tank slurry pump and a conveying pipe network. According to the slurry circulating system provided by the utility model, the large tank body only comprises the first tank and the water feeding tank, and the water feeding tank comprises the second tank and / or the third tank, namely, the slurry circulating system can be formed by combining the first tank, the second tank and the third tank, or combining the first tank and the second tank, or combining the first tank and the third tank; compared with six tanks, the number of the tanks is reduced, the equipment cost is reduced, and meanwhile, the slurry circulating system is compact in structure and small in occupied area. According to the slurry circulating system provided by the utility model, the weighting pump is arranged to carry out slurry weighting and performance allocation as well as mutual pouring of the tanks; the tank slurry pump is arranged for grouting operation, and slurry circulation between bins of the first tank and the water feeding tank (the second tank and / or the third tank) can be achieved through the tank slurry pump.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling auxiliary equipment, and more specifically to a mud circulation system. Background Art

[0002] In oil drilling operations, drilling fluid plays the roles of storing, blending, removing cuttings and sand grains, and controlling the solid content, and maintaining the properties of the drilling fluid is an important guarantee for ensuring the safety of drilling operations and improving the drilling and workover efficiency. The drilling fluid purification system is an important auxiliary device for maintaining the performance of the drilling fluid. Its main functions are: first, separating impurities in the drilling fluid, such as gas, mud, cuttings, etc., to ensure the specific gravity of the drilling fluid; second, adding ash and chemical additives to the drilling fluid to make the drilling fluid reach ideal properties such as density and viscosity.

[0003] During normal oil testing and workover processes, to ensure the stability of the mud properties, it is necessary to continuously remove harmful solids in the mud. The mud returned from the well is initially separated into solid and liquid by a vibrating screen and a conical sand settling tank, and solid particles larger than 96 μm in the mud are removed.

[0004] In the prior art, a patent with the publication number CN114412397A discloses a workover rig mud circulation system and method, which relates to the technical field of drilling auxiliary equipment, including six circulation tanks, a weighting pump, a mud pump, an output pipe network and an intake pipe network. The six circulation tanks are respectively the first to sixth tanks. The first tank includes a vibrating screen, a sand settling bin and a degassing bin. The second tank is provided with a gravity settling bin and a water inlet bin. The third, fifth and sixth tanks are each provided with a water inlet bin. The fourth tank is provided with a grouting bin and a water inlet bin. The mud pump is connected to the water inlet bins in each circulation tank through an external pipeline. A grouting pump is arranged in the grouting bin, and a gravity settling pond is arranged in the gravity settling bin. An intake pipe network is arranged between the circulation tanks, and an output pipe network is arranged at the bottom of the circulation tanks. Valves are arranged on both the intake pipe network and the output pipe network. The weighting pump is communicated with each circulation tank through the output pipe network and the intake pipe network, solving the problems of the existing mud circulation system being not compact enough in structure, difficult to relocate and install, large in floor area, and inconvenient to regulate.

[0005] The workover rig mud circulation system disclosed in the above patent has the following defects: It relies on a total of six tanks from the first to the sixth tanks to achieve mud purification and circulation, and the large number of tanks results in a high equipment cost. Summary of the Utility Model

[0006] In order to overcome the defects existing in the above prior art, the purpose of the utility model is to provide a mud circulation system, the tanks of which can be combined by the first tank, the second tank and the third tank, or the first tank and the second tank, or the first tank and the third tank. The number of tanks is reduced compared with six tanks, reducing the equipment cost.

[0007] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0008] A mud circulation system includes a No. 1 tank, a water supply tank, a weighting pump, a tank slurry pump and a conveying pipe network;

[0009] A shunt box is provided at the top of the No. 1 tank, and a conical sand settling bin and a supply bin are provided inside and are connected. The inlet of the shunt box is connected to the wellhead, and the outlet is connected to the inside of the conical sand settling bin and the supply bin. A vibrating screen is provided in the conical sand settling bin;

[0010] The conveying pipe network includes a suction pipe network and an output pipe network. The suction pipe network is arranged at the lower part inside the No. 1 tank and the water supply tank, and the output pipe network is arranged at the upper part inside the No. 1 tank and the water supply tank. Valves and pipe orifices are provided in each bin of the No. 1 tank and the water supply tank for the suction pipe network and the output pipe network. The inlet of the weighting pump is connected to the suction pipe network, and the outlet is connected to the output pipe network;

[0011] The inlet of the tank slurry pump is connected with a first inlet pipe and a second inlet pipe. The first inlet pipe is connected to the upper part inside the supply bin, and the second inlet pipe is connected to the suction pipe network inside the No. 1 tank; the outlet of the tank slurry pump is connected with a first outlet pipe and a second outlet pipe. The first outlet pipe is connected to the wellhead, and the second outlet pipe is connected to the output pipe network inside the No. 1 tank.

[0012] Preferably, the water supply tank includes a No. 2 tank and / or a No. 3 tank;

[0013] A sand settling bin and a No. 2 water supply bin which are connected to each other are provided inside the No. 2 tank;

[0014] Two No. 3 water supply bins which are connected to each other are provided inside the No. 3 tank.

[0015] Preferably, the conveying pipe network further includes a connecting pipe network which is arranged at the bottom inside the No. 1 tank and the water supply tank. The connecting pipe network is connected with a mud tank in each bin of the No. 1 tank and the water supply tank, and a mud tank plug board is arranged on the mud tank.

[0016] Preferably, it further includes a chemical tank. The inlet of the chemical tank is connected to the output pipe network through a pipeline, and the outlet is connected to the No. 1 tank and / or the water supply tank through a pipeline.

[0017] Preferably, stirrers and liquid level alarms are provided inside the No. 1 tank, the water supply tank and the chemical tank.

[0018] Preferably, it further includes a mud pump which is connected to the inside of the No. 2 tank and / or the No. 3 tank through a pipeline.

[0019] Preferably, a mixing funnel is further arranged on the output pipe network connected to the outlet of the weighting pump, and the mixing funnel is located in front of the inlet pipe of the chemical tank.

[0020] Preferably, cleaning sand doors are provided at the inner bottoms of the first tank and the water supply tank.

[0021] Preferably, a flange interface is also reserved on the outlet pipe of the tank slurry pump.

[0022] Preferably, the first tank and the water supply tank are both provided with flip - type walkway plates, flip - type railings and ladders.

[0023] Advantages of the present utility model:

[0024] 1. The mud circulation system provided by the present utility model, the large tanks only include the first tank and the water supply tank, and the water supply tank includes the second tank and / or the third tank. That is, the mud circulation system of the present utility model can be composed of the combination of the first tank, the second tank and the third tank, or the combination of the first tank and the second tank, or the combination of the first tank and the third tank. The number of tanks is reduced compared with the six - tank quantity, reducing the equipment cost, and at the same time making the mud circulation system compact in structure and small in floor area.

[0025] 2. The mud circulation system provided by the present utility model, through the setting of a weight - adding pump for mud weighting and performance adjustment, and the mutual pouring between tanks; through the setting of a tank slurry pump for grouting operation, and the mud circulation between each bin of the first tank and the water supply tank (the second tank and / or the third tank) can also be realized by the tank slurry pump. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the combination of the first tank, the second tank and the third tank of the mud circulation system of the present utility model;

[0027] Figure 2 For Figure 1 The top - view of the combination;

[0028] Figure 3 It is a schematic diagram of the combination of the first tank and the second tank of the mud circulation system of the present utility model;

[0029] Figure 4 It is a schematic diagram of the combination of the first tank and the third tank of the mud circulation system of the present utility model;

[0030] Reference Signs:

[0031] 1. First tank; 11. Shunt box; 12. Vibrating screen; 13. Supply bin; 14. Conical sand - settling bin; 2. Second tank; 21. Sand - settling bin; 22. Second water - supply bin; 3. Third tank; 31. Third water - supply bin; 4. Weight - adding pump; 5. Tank slurry pump; 6. Delivery pipe network; 61. Suction pipe network; 62. Output pipe network; 63. First inlet pipe; 64. Second inlet pipe; 65. First outlet pipe; 66. Second outlet pipe; 67. Connecting pipe network; 68. Mud trough plugboard; 7. Chemical tank; 8. Stirrer; 9. Mud pump; 10. Mixing funnel. Detailed implementation mode

[0032] The following will clearly and completely describe the concept, specific structure and technical effects generated by the present utility model in combination with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present utility model.

[0033] A mud circulation system, as Figures 1 - 4 shown, includes a No. 1 tank 1, a water supply tank, a weighting pump 4, a slurry filling pump 5 and a conveying pipeline network 6;

[0034] A shunt box 11 is arranged at the top of the No. 1 tank 1, and a communicating conical sand settling bin 14 and a supply bin 13 are arranged inside. The inlet of the shunt box 11 is connected to the wellhead, and the outlet is connected to the conical sand settling bin 14 and the supply bin 13. A vibrating screen 12 is arranged in the conical sand settling bin 14;

[0035] The conveying pipeline network 6 includes a suction pipeline network 61 and a discharge pipeline network 62. The suction pipeline network 61 is arranged at the lower part inside the No. 1 tank 1 and the water supply tank, and the discharge pipeline network 62 is arranged at the upper part inside the No. 1 tank 1 and the water supply tank. Valves and pipe orifices are arranged in each bin of the No. 1 tank 1 and the water supply tank for the suction pipeline network 61 and the discharge pipeline network 62. The inlet of the weighting pump 4 is connected to the suction pipeline network 61, and the outlet is connected to the discharge pipeline network 62;

[0036] The inlet of the slurry filling pump 5 is connected with a first inlet pipe 63 and a second inlet pipe 64. The first inlet pipe 63 is connected to the upper part inside the supply bin 13, and the second inlet pipe 64 is connected to the suction pipeline network 61 inside the No. 1 tank 1; the outlet of the slurry filling pump 5 is connected with a first outlet pipe 65 and a second outlet pipe 66. The first outlet pipe 65 is connected to the wellhead, and the second outlet pipe 66 is connected to the discharge pipeline network 62 inside the No. 1 tank 1.

[0037] In this embodiment, during use, the mud flowing out of the wellhead first enters the shunt box 11, and then enters the conical sand settling bin 14 of the No. 1 tank 1 through the shunt box 11 for the mud purification and circulation process, or enters the supply bin 13 for the supply process.

[0038] In this embodiment, by arranging the suction pipeline network 61 and the discharge pipeline network 62, the mutual inversion between the tanks can be realized through the weighting pump 4; the weighting pump 4 can respectively suck the mud in each partition bin of the No. 1 tank 1 and the water supply tank through the built-in suction pipeline network 61 and the bottom suction valve at the bottom of the tank for weighting and performance adjustment, and then convey the adjusted mud to each partition bin of the No. 1 tank 1 and the water supply tank through the discharge pipeline network 62 and the butterfly valve at the upper part inside the tank. Then, the slurry filling pump 5 fills the slurry.

[0039] The tank slurry pump 5 sucks the mud in the supply bin 13 through the first inlet pipe 63, and pours the mud into the wellhead through the first outlet pipe 65 to perform grouting operations and realize mud circulation. Mud circulation between each tank and bin can also be realized through the tank slurry pump 5, the second inlet pipe 64, the second outlet pipe 66, the suction pipe network 61 and the output pipe network 62. The tank slurry pump 5 sucks the mud in the bin through the suction pipe network 61 and the second inlet pipe 64, and then transports it to other bins through the second outlet pipe 66 and the output pipe network 62 to realize mud circulation.

[0040] In this embodiment, the water supply tank includes a No. 2 tank 2 and / or a No. 3 tank 3;

[0041] The second tank 2 is provided with a sand settling bin 21 and a second water supply bin 22 which are interconnected;

[0042] Two No. 3 water supply tanks 31 are arranged in the No. 3 tank 3 and are connected to each other.

[0043] 1. Can 1

[0044] The tank size (length × width × height): 9180 × 2800 × 1800 (mm); volume: 24.4m 3 ; Effective volume: 20.7m 3 The conical sand settling bin 14 is equipped with two vibrating screens. The vibrating screens should be installed with uniform spacing and a safe passage for personnel. The diversion box 11 has a size of 4200mm×600mm×1100mm, and a door frame is set on the top to facilitate the installation of logging instruments.

[0045] In this embodiment, for tank No. 1, the traditional diversion type is cancelled, and the front-end buffer bins of the two vibrating screens are modified to form an integrated diversion box. At the same time, the length of the vibrating screen is shortened, and the 1.8-meter tank body is matched so that the size of tank No. 1 meets the transportation requirements after the vibrating screen is installed. Therefore, there is no need to remove the vibrating screen of tank No. 1 under transportation conditions, which greatly reduces the disassembly time and reduces transportation costs.

[0046] 2. Tank No. 2

[0047] The tank size (length × width × height): 9000 × 2800 × 1800 (mm); volume: 41.3m 3 ; Effective volume: 35.1m 3 The tank body is divided into two compartments, the grit chamber 21 and the No. 2 water chamber 22. The effective volume of the grit chamber 21 is not less than 27.5m 3 (6×2.8×1.8 meters), the mud enters the sand settling tank for natural sedimentation and then overflows into the No. 2 water tank 22. No. 2 water tank 22: effective volume not less than 13.8m 3 (3×2.8×1.8 meters).

[0048] 3. No. 3 tank

[0049] The dimensions of its tank body (length × width × height): 9000 × 2800 × 1800 (mm). Volume: 41.3 m 3 ; Effective volume: 35.1 m 3 .

[0050] In this embodiment, for the first tank 1, the conical sand settling bin 14 and the vibrating screen 12 inside it are used in combination to perform primary solid-liquid separation on the mud; the supply bin 13 is used for grouting. For the second tank 2, the sand settling bin 21 inside it is used for natural precipitation of the mud, and the second water supply bin 22 is used as the water supply bin for the mud pump; for the third tank 3, the first third water supply bin 31 inside it is used as the water supply bin for the mud pump; the second third water supply bin 31 is used for mud preparation.

[0051] In this embodiment, the mud circulation system can be composed of the first tank 1, the second tank 2 and the third tank 3 in combination, as Figure 1 and 2 shown. The mud circulation system in this situation is suitable for use in well repair with relatively high requirements, complex well control and sufficient site.

[0052] The mud circulation system can also be composed of the first tank 1 and the second tank 2 in combination, as Figure 3 shown, and the first tank 1 and the third tank 3 in combination, as Figure 4 shown. The mud circulation system in this situation is suitable for places with relatively low well repair requirements and large site limitations.

[0053] This mud circulation system can also be separately configured by recombining the first tank 1 with the idle second tank 2 and third tank 3, which can greatly reduce costs.

[0054] As Figure 1 , 3 and 4 shown, the conveying pipeline network 6 further includes a connecting pipeline network 67. The connecting pipeline network 67 is arranged at the inner bottom of the first tank 1 and the water supply tank. The connecting pipeline network 67 is connected with mud troughs in each bin of the first tank 1 and the water supply tank. Mud trough inserts 68 are arranged on the mud troughs. By setting the connecting pipeline network 67 and the mud trough inserts 68, the mud can be circulated between the first tank 1, the second tank 2 and the third tank 3.

[0055] As Figure 1 , 3 and 4 shown, it further includes a chemical tank 7. The inlet of the chemical tank 7 is connected to the output pipeline network 62 through a pipeline, and the outlet is connected to the first tank 1 and / or the water supply tank through a pipeline. A mixing funnel 10 is also arranged on the output pipeline network 62 connected to the outlet of the weight pump 4. The mixing funnel 10 is located in front of the inlet pipe of the chemical tank 7. The chemicals are added to the mixing funnel 10, then transported to the chemical tank 7 by the weight pump 4, and finally transported from the chemical tank 7 into the first tank 1, the second tank 2 and / or the third tank 3. By adding chemicals to the mud, the mud can reach the ideal density, viscosity and other properties.

[0056] As Figure 1 、 3 and as shown in Figure 4, a stirrer 8 and a pneumatic-electric integrated alarm are provided in the first tank 1, the water supply tank, and the medicine tank 7. The stirrer 8 is used to stir the fluid in the first tank 1, the water supply tank, and the medicine tank 7, and the pneumatic-electric integrated alarm is used to indicate the liquid level height in the first tank 1, the water supply tank, and the medicine tank 7, and the display and alarm of the volume are transmitted remotely by data. The liquid level alarm is a pneumatic-electric integrated alarm, which has dual gas-electric protection and functions such as on-site alarm, data remote transmission, and remote control.

[0057] As Figure 1 、 3 and as shown in Figure 4, it further includes a mud pump 9. The mud pump 9 is connected to the second tank 2 and / or the third tank 3 through a pipeline, and the mud pump 9 is used to pump mud to the wellhead.

[0058] In this embodiment, sand cleaning doors are provided at the bottoms of the first tank 1 and the water supply tank for sand cleaning work of the tank body. A flange interface is also reserved at the outlet pipe of the grouting pump 5 for the daily use of other mud by the trial repair team. Flip-type walkway plates, flip-type railings, and ladders are provided on both the first tank 1 and the water supply tank.

[0059] In this embodiment, for the mud purification and circulation process, after the mud well shunt box 11 enters the vibrating screen 12 to screen out large solid particles, it enters the conical sand settling bin 14 for solid-liquid separation to further remove solid particles, and then enters the supply bin 13 of the first tank, each bin of the second tank and the third tank, and finally reaches the mud pump 9. This is the mud purification and circulation process.

[0060] For the supply process, it directly enters the supply bin 13 through the bypass of the shunt box 11, and the grouting pump 5 injects it back into the wellhead. This is the supply process.

[0061] In addition, a rain shed is installed in the mud circulation system. To avoid the high-altitude operation risks caused by the installation of traditional rain sheds, the rain shed here adopts a ground module assembly and an overall lifting installation method. The installation personnel do not need to install on the top of the rain shed, and there is no high-altitude operation risk.

[0062] The above has specifically described the implementation manners of the present utility model, but the present utility model is not limited to the above embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present utility model, and these equivalents or substitutions are all included within the scope defined by the claims of the present utility model.

Claims

1. A mud circulation system, characterized in that, It includes a No. 1 tank (1), a water supply tank, a weighting pump (4), a grouting pump (5) and a conveying pipeline network (6); A shunt box (11) is arranged at the top of the No. 1 tank (1), and a communicating conical sand settling bin (14) and a supply bin (13) are arranged inside. The inlet of the shunt box (11) is connected to the wellhead, and the outlet is connected into the conical sand settling bin (14) and the supply bin (13). A vibrating screen (12) is arranged in the conical sand settling bin (14); The conveying pipeline network (6) includes a suction pipeline network (61) and an output pipeline network (62). The suction pipeline network (61) is arranged at the lower part inside the No. 1 tank (1) and the water supply tank, and the output pipeline network (62) is arranged at the upper part inside the No. 1 tank (1) and the water supply tank. Valves and pipe orifices are arranged in each bin of the No. 1 tank (1) and the water supply tank for the suction pipeline network (61) and the output pipeline network (62). The inlet of the weighting pump (4) is connected to the suction pipeline network (61), and the outlet is connected to the output pipeline network (62); The inlet of the grouting pump (5) is connected with a first inlet pipe (63) and a second inlet pipe (64). The first inlet pipe (63) is connected to the upper part inside the supply bin (13), and the second inlet pipe (64) is connected to the suction pipeline network (61) inside the No. 1 tank (1). The outlet of the grouting pump (5) is connected with a first outlet pipe (65) and a second outlet pipe (66). The first outlet pipe (65) is connected to the wellhead, and the second outlet pipe (66) is connected to the output pipeline network (62) inside the No. 1 tank (1).

2. The mud circulation system according to claim 1, wherein The water supply tank includes a No. 2 tank (2) and / or a No. 3 tank (3); A sand settling bin (21) and a No. 2 water supply bin (22) which communicate with each other are arranged inside the No. 2 tank (2); Two No. 3 water supply bins (31) which communicate with each other are arranged inside the No. 3 tank (3).

3. A mud circulation system according to claim 1, characterized in that, The conveying pipeline network (6) further includes a connecting pipeline network (67). The connecting pipeline network (67) is arranged at the bottom inside the No. 1 tank (1) and the water supply tank. Mud troughs are connected in each bin of the No. 1 tank (1) and the water supply tank for the connecting pipeline network (67), and mud trough inserts (68) are arranged on the mud troughs.

4. A mud circulation system as claimed in claim 1, wherein, It further includes a chemical tank (7). The inlet of the chemical tank (7) is connected to the output pipeline network (62) through a pipeline, and the outlet is connected to the No. 1 tank (1) and / or the water supply tank through a pipeline.

5. The mud circulation system according to claim 4, characterized in that Agitators (8) and liquid level alarms are arranged inside the No. 1 tank (1), the water supply tank and the chemical tank (7).

6. The mud circulation system according to claim 2, characterized in that, It further includes a mud pump (9). The mud pump (9) is connected to the inside of the No. 2 tank (2) and / or the No. 3 tank (3) through a pipeline.

7. The mud circulation system according to claim 4, characterized in that, A mixing funnel (10) is further arranged on the output pipeline network (62) connected to the outlet of the weighting pump (4). The mixing funnel (10) is located in front of the inlet pipe of the chemical tank (7).

8. A mud circulation system according to claim 1, characterized in that, Sand cleaning doors are arranged at the bottom inside the No. 1 tank (1) and the water supply tank.

9. A mud circulation system according to claim 1, characterized in that, A flange interface is reserved on the outlet pipe of the grouting pump (5).

10. A mud circulation system as claimed in claim 1, wherein, Flip - type walkway plates, flip - type railings and ladders are arranged on the No. 1 tank (1) and the water supply tank.

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