A high-density drilling fluid desanding and desilting cleaner and vertical drum processor

Abstract

The present invention discloses a high-density drilling fluid desanding and desilting cleaner, which uses a vertical drum processor to perform primary separation of large-particle rock cuttings larger than 40 μm in the high-density drilling fluid, and a desilting cyclone performs a second solid-liquid phase separation on the drilling fluid, separating rock cuttings and barite larger than 20 μm from the drilling fluid, and a cleaning vibrating screen removes the large-particle rock cuttings and barite separated for the primary separation, as well as rock cuttings larger than 20 μm in the second-separated rock cuttings and barite, and recycles the barite and drilling fluid, thereby achieving the removal of solid phases larger than 20 μm in the high-density drilling fluid. In the vertical drum processor, the high-density drilling fluid can reduce viscosity and shear force under the high-speed stirring of the spiral blades, and the large-particle solid phase is discharged from the slag discharge port at the lower part of the side wall of the vertical drum under the force of its own gravity and the push of the spiral blades of the vertical spiral pusher, thereby achieving the solid-liquid separation effect and ensuring the discharge volume; the present invention also discloses a vertical drum processor.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling, in particular to a high-density drilling fluid desanding and demud removing cleaner and a vertical drum processor. Background Art

[0002] In oil drilling operations, the equipment used for solid-phase separation of drilling fluid generally adopts drilling fluid desander and desilter, which are collectively referred to as drilling fluid cleaners, and both use a group of hydrocyclones for solid-liquid separation.

[0003] In the cyclone separation stage of high-density drilling fluid, there are still some problems that need to be solved on site. The main manifestations are: under high-density conditions, especially when the density exceeds 2.0g / cm 3 At the same time, the existing desanders and desilters become less effective, and in severe cases, there is even no solid phase discharged from the bottom flow port. As a result, the solid particles in the drilling fluid continue to increase, increasing the workload of the downstream centrifuge and the probability of the centrifuge getting stuck or blocked, which leads to serious wear of equipment such as mud pumps, drill bits, drilling tools, and downhole instruments, reduced drilling speed, and even stuck drilling and drilling stoppage, while affecting the quality of electrical measurement and cementing, and reducing the permeability of oil and gas layers and oil and gas production capacity. At the same time, due to the high density of the drilling fluid, the use effect of the centrifuge becomes worse, and some drilling teams even do not use the centrifuge directly. At this time, the entire drilling fluid purification system only relies on the vibrating screen to process the drilling fluid, which not only reduces the quality of drilling fluid purification and increases the complexity of the downhole, but also wastes a lot of energy and accelerates the wear of equipment.

[0004] The horizontal centrifugal desanding and desilting integrated machine in the prior art is only suitable for solid phase separation of drilling fluid under low density conditions. When the density of the drilling fluid is greater than 1.8g / cm 3 At the same time, the horizontal centrifugal sand and mud removal machine is easily blocked and cannot meet the on-site needs. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a high-density drilling fluid desander and desilter cleaner and a vertical drum processor to solve the problem of clogging that is easily generated when the horizontal centrifugal desander and desilter integrated machine in the prior art performs solid phase separation on high-density drilling fluid.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] A high-density drilling fluid desanding and desilting cleaner, comprising: a vertical drum processor, a cleaning vibrating screen and a desilting cyclone;

[0008] The processor overflow port of the vertical drum processor is connected to the cyclone liquid inlet of the desilting cyclone, and the processor underflow port of the vertical drum processor is connected to the vibrating screen liquid inlet of the cleaning vibrating screen;

[0009] The cyclone underflow port of the desilting cyclone is connected to the vibrating screen liquid inlet of the cleaning vibrating screen.

[0010] Preferably, it also includes: a drilling fluid buffer tank;

[0011] The buffer box liquid inlet of the drilling fluid buffer box is connected to the processor overflow port of the vertical drum processor, and the buffer box liquid outlet of the drilling fluid buffer box is connected to the cyclone liquid inlet of the desilting cyclone.

[0012] Preferably, it also includes: a centrifugal pump;

[0013] The centrifugal pump liquid inlet of the centrifugal pump is connected to the buffer tank liquid outlet of the drilling fluid buffer tank, and the centrifugal pump liquid outlet of the centrifugal pump is connected to the cyclone liquid inlet of the desilting cyclone.

[0014] Preferably, it also includes: a liquid level sensor and an electrical control cabinet;

[0015] The liquid level sensor is arranged in the drilling fluid buffer tank, and is used to detect the amount of drilling fluid in the drilling fluid buffer tank;

[0016] The electrical control cabinet can control the motor speed of the centrifugal pump according to the detection signal of the liquid level sensor, so that the liquid level in the drilling fluid buffer tank remains balanced.

[0017] Preferably, it also includes: a butterfly valve;

[0018] The butterfly valve is installed near the bottom of the drilling fluid buffer tank and is used to drain the drilling fluid in the drilling fluid buffer tank.

[0019] A vertical drum processor for removing sand from drilling fluid, comprising: a power assembly, a vertical drum, a vertical screw pusher and a processor liquid inlet pipe;

[0020] The vertical screw pusher is arranged in the vertical drum, and an annular cavity is formed between the vertical screw pusher and the vertical drum; the spiral blades of the vertical screw pusher are located in the annular cavity and directed downward; the output end of the power assembly can drive the vertical screw pusher and the vertical drum to rotate;

[0021] A discharge port is provided in the middle of the vertical spiral pusher, and the outlet of the processor liquid inlet pipe cooperates with the discharge port; a slag discharge port is provided at the lower part of the side wall of the vertical drum, and a liquid discharge port is provided at the upper part of the side wall and / or the top surface of the vertical drum.

[0022] Preferably, the inner side wall of the vertical drum is a conical surface that is larger at the top and smaller at the bottom, the outer side wall of the vertical spiral pusher is a conical surface that is larger at the top and smaller at the bottom, the annular cavity is conical, and the spiral blade is a cone that matches the annular cavity.

[0023] Preferably, it also includes: an inner partition;

[0024] The inner partition is an annular structure, and the outer side wall of the inner partition is fixedly connected to the inner side wall of the middle part of the vertical screw pusher;

[0025] The processor liquid inlet pipe passes through the bottom of the vertical screw pusher, and the outlet of the processor liquid inlet pipe is higher than the inner partition; the shape of the inner side wall of the inner partition matches the outer side wall of the processor liquid inlet pipe.

[0026] Preferably, it also includes: an outer shell;

[0027] The vertical drum can be rotatably disposed in the outer shell.

[0028] Preferably, it also includes: an outer baffle;

[0029] The outer partition is an annular structure, the outer side wall of the outer partition is fixedly connected to the inner side wall of the outer shell, and the inner side wall of the outer partition is matched with the outer wall of the vertical spiral pusher.

[0030] From the above content, it can be seen that the high-density drilling fluid desanding and demudging cleaner disclosed in the present invention has a vertical drum processor that performs initial separation of large-particle rock cuttings larger than 40 μm and some barite in the high-density drilling fluid, and a demuding cyclone performs a second solid-liquid phase separation on the drilling fluid, and the second solid-liquid phase separation mainly separates rock cuttings and barite larger than 20 μm from the drilling fluid, and the cleaning vibrating screen removes the large-particle rock cuttings and barite separated for the initial separation, as well as the rock cuttings larger than 20 μm in the rock cuttings and barite separated for the second time, and recovers the barite and drilling fluid, thereby achieving the removal of solid phases larger than 20 μm in the high-density drilling fluid.

[0031] The present invention also discloses a vertical drum processor for removing sand from drilling fluid. When the high-density drilling fluid is stirred at a high speed by the spiral blades of the vertical spiral pusher, the viscosity and shear force of the high-density drilling fluid are reduced. Under the force of its own gravity and the push of the spiral blades of the vertical spiral pusher, the large particles of solid phase in the high-density drilling fluid are discharged from a slag discharge port provided at the lower part of the side wall of the vertical drum, thereby achieving separation of the large particles of solid phase in the high-density drilling fluid. The drilling fluid from which the large particles of solid phase are separated is discharged through a discharge port provided at the upper part of the side wall and / or the top surface of the vertical drum, thereby achieving separation of the large particles of solid phase in the high-density drilling fluid and ensuring the discharge volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of a high-density drilling fluid desanding and demuding cleaner provided by an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the structure of a cleaning vibrating screen provided in an embodiment of the present invention;

[0035] Figure 3 A schematic diagram of the structure of a vertical drum processor provided by an embodiment of the present invention;

[0036] Figure 4 A schematic diagram of the structure of a drilling fluid buffer box provided in an embodiment of the present invention;

[0037] Figure 5 A schematic diagram of a process for removing solid particles from drilling fluid provided by an embodiment of the present invention;

[0038] Figure 6 A schematic diagram of the structure of a vertical drum processor provided by an embodiment of the present invention;

[0039] Figure 7 A schematic structural diagram of a vertical drum processor provided in an embodiment of the present invention.

[0040] Figure 1-Figure 7 In the embodiment, a vertical drum processor 1, a drive motor 2, a processor overflow port 3, a drilling fluid buffer tank 4, a liquid level sensor 5, a base 6, a centrifugal pump 7, a cleaning vibrating screen 8, a cyclone inlet pipe 9, an electrical control cabinet 10, a desludging cyclone 11, a liquid inlet pipe ball valve 12, a cyclone bracket 13, a cyclone overflow pipe 14, an overflow pipe ball valve 15, a support spring 16, a lifting device 17, a processor inlet pipe 18, a butterfly valve 19, a processor fixing frame 21, an outer shell 22, a vertical drum 23, a vertical spiral pusher 24, an inner partition 25, a discharge port 26, a first bearing 27, a discharge port 28, a spline shaft 29, a second bearing 30, a differential 31, a torque limiter 32, an elastic pin coupling 33, a belt transmission device 34, an outer partition 35, a slag discharge port 36, a third bearing 37, a support leg 38, a fourth bearing 39, a shock absorber seat 41 and a spiral blade 42 are provided. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising 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 device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0043] The embodiment of the present invention provides a high-density drilling fluid desanding and desilting cleaner, see Figure 1 , Figure 1 This is a schematic structural diagram of a high-density drilling fluid desanding and desilting cleaner of the present application, wherein the high-density drilling fluid desanding and desilting cleaner comprises: a vertical drum processor 1, a cleaning vibrating screen 8 and a desilting cyclone 11;

[0044] The processor overflow port 3 of the vertical drum processor 1 is connected to the cyclone liquid inlet of the desilting cyclone 11, and the processor underflow port of the vertical drum processor 1 is connected to the vibrating screen liquid inlet of the cleaning vibrating screen 8;

[0045] The cyclone underflow port of the desilting cyclone 11 is connected to the vibrating screen liquid inlet of the cleaning vibrating screen 8 .

[0046] It should be noted that the high-density drilling fluid enters the vertical drum processor 1, which can separate large-particle cuttings larger than 40 μm and some barite, and can reduce the density and viscosity of the high-density drilling fluid, increase the density difference between the cuttings and the drilling fluid, and the large-particle cuttings larger than 40 μm and some barite enter the cleaning vibrating screen 8 through the low flow port, and the remaining drilling fluid enters the desilting cyclone 11 through the processor overflow port 3 for treatment, and the cuttings and barite larger than 20 μm in the drilling fluid are removed, and the desilting cyclone 11 is discharged to the cleaning vibrating screen 8 through the cyclone bottom flow port of the desilting cyclone 11, and the cleaning vibrating screen 8 removes the cuttings larger than 20 μm and recovers the barite, thereby achieving the removal of solid phases larger than 20 μm in the high-density drilling fluid.

[0047] In the embodiment of the present application, the overflow port of the vertical drum processor is connected to the cyclone inlet of the desilting cyclone, the bottom flow port of the vertical drum processor is connected to the shale shaker inlet of the cleaning shale shaker; the cyclone bottom flow port of the desilting cyclone is connected to the shale shaker inlet of the cleaning shale shaker. The vertical drum processor performs the initial separation of large-particle rock cuttings and part of barite larger than 40 μm in the high-density drilling fluid, the desilting cyclone performs the second solid-liquid phase separation on the drilling fluid, and the second solid-liquid phase separation mainly separates the rock cuttings and barite larger than 20 μm from the drilling fluid, the cleaning shale shaker removes the large-particle rock cuttings and barite separated for the first time, and the rock cuttings larger than 20 μm in the rock cuttings and barite separated for the second time, and recycles the barite and drilling fluid, thereby achieving the removal of the solid phase larger than 20 μm in the high-density drilling fluid.

[0048] Further, it also includes: a driving motor 2 for driving the vertical drum processor 1;

[0049] The processor overflow port 3 is arranged on the side wall of the vertical drum processor 1;

[0050] A processor liquid inlet pipe 18 is provided at the bottom of the vertical drum processor 1 .

[0051] It should be noted that the driving motor 2 can drive the vertical drum processor 1 to process the high-density drilling fluid, so that large-particle cuttings larger than 40 μm and part of barite are separated from the high-density drilling fluid.

[0052] The processor liquid inlet pipe 18 is mainly used to introduce high-density drilling fluid into the vertical drum processor 1.

[0053] Further, it also includes: a base 6, a support spring 16 and a lifting device 17;

[0054] The cleaning vibration screen 8 is fixed to the base 6 via the support spring 16;

[0055] The lifting device 17 is fixed on the base 6 and is used to adjust the inclination angle of the cleaning vibration screen 8 .

[0056] It should be noted that, by providing the lifting device 17 , the inclination angle of the cleaning vibration screen 8 can be changed by adjusting the lifting device 17 , and the inclination angle refers to the angle between the cleaning vibration screen 8 and the base.

[0057] Preferably, the inclination angle ranges from -2° to +6°.

[0058] It should be noted that the tilt angle can be set according to actual needs and is not limited to -2° to +6°.

[0059] Further, it also includes: a drilling fluid buffer tank 4;

[0060] The buffer tank inlet of the drilling fluid buffer tank 4 is connected to the processor overflow port 3 of the vertical drum processor 1 , and the buffer tank outlet of the drilling fluid buffer tank 4 is connected to the cyclone inlet of the desilting cyclone 11 .

[0061] It should be noted that by setting up the drilling fluid buffer tank 4, when the drilling fluid overflowing from the processor overflow port 3 of the vertical drum processor 1 is insufficient, the amount of drilling fluid entering the desilting cyclone 11 can be guaranteed, thereby realizing that the vertical drum processor 1, the desilting cyclone 11 and the cleaning vibrating screen 8 are all in a continuous working state.

[0062] Further, it also includes: a centrifugal pump 7;

[0063] The centrifugal pump inlet of the centrifugal pump 7 is connected to the buffer tank outlet of the drilling fluid buffer tank 4 , and the centrifugal pump outlet of the centrifugal pump 7 is connected to the cyclone inlet of the desilting cyclone 11 .

[0064] It should be noted that the centrifugal pump 7 is mainly used to transport the drilling fluid in the drilling fluid buffer tank 4 to the desilting cyclone 11 , so as to continuously transport the drilling fluid to the desilting cyclone 11 .

[0065] Further, it also includes: a liquid level sensor 5 and an electrical control cabinet 10;

[0066] The liquid level sensor 5 is disposed in the drilling fluid buffer tank 4 and is used to detect the amount of drilling fluid in the drilling fluid buffer tank 4;

[0067] The electrical control cabinet 10 can control the motor speed of the centrifugal pump 7 according to the detection signal of the liquid level sensor 5 to keep the liquid level in the drilling fluid buffer tank 4 balanced.

[0068] It should be noted that the electrical control cabinet 10 controls the motor speed of the centrifugal pump 7 through the detection signal of the liquid level sensor 5. When the liquid level sensor 5 sends a signal that the amount of drilling fluid in the drilling fluid buffer tank 4 is too low, the electrical control cabinet 10 controls the motor speed of the centrifugal pump 7 to decrease, so that the flow rate of drilling fluid extracted by the centrifugal pump 7 in the drilling fluid buffer tank 4 is reduced, so as to ensure that the drilling fluid buffer tank 4 can continuously transport drilling fluid to the desilting cyclone 11; when the liquid level sensor 5 sends a signal that the amount of drilling fluid in the drilling fluid buffer tank 4 is too high, the electrical control cabinet 10 controls the motor speed of the centrifugal pump 7 to increase, so that the flow rate of drilling fluid extracted by the centrifugal pump 7 in the drilling fluid buffer tank 4 is increased, so as to prevent the drilling fluid in the drilling fluid buffer tank 4 from overflowing.

[0069] Further, it also includes: a butterfly valve 19;

[0070] The butterfly valve 19 is installed near the bottom of the drilling fluid buffer tank 4 and is used to drain the drilling fluid in the drilling fluid buffer tank 4 .

[0071] It should be noted that after the entire equipment stops working, the drilling fluid in the drilling fluid buffer tank 4 can be discharged by opening the butterfly valve 19, which can prevent the rock cuttings and barite in the drilling fluid from being deposited in the drilling fluid buffer tank 4.

[0072] Specifically, there are multiple desilting cyclones 11 connected in parallel.

[0073] It should be noted that by arranging a plurality of desludging cyclones 11 side by side, the processing amount of drilling fluid can be increased per unit time.

[0074] Further, it also includes: a liquid inlet pipe ball valve 12 and a cyclone liquid inlet pipe 9;

[0075] One end of the liquid inlet pipe ball valve 12 is connected to one end of the cyclone liquid inlet pipe 9, and the other end is connected to the cyclone liquid inlet of the desludging cyclone 11;

[0076] The other end of the cyclone liquid inlet pipe 9 is connected to the processor overflow port 3 of the vertical drum processor 1 .

[0077] It should be noted that the liquid inlet pipe ball valve 12 can control the delivery amount of the drilling fluid when the vertical drum processor 1 delivers the drilling fluid to the desilting cyclone 11 through the cyclone liquid inlet pipe 9 .

[0078] Further, it also includes: an overflow pipe ball valve 15 and a cyclone overflow pipe 14;

[0079] One end of the overflow pipe ball valve 15 is connected to the cyclone overflow port 3 of the desilting cyclone 11 , and the other end is connected to the cyclone overflow pipe 14 .

[0080] It should be noted that the overflow pipe ball valve 15 can control the amount of drilling fluid overflowing from the desilting cyclone 11 to the cyclone overflow pipe 14 .

[0081] In order to facilitate the understanding of the above scheme, Figure 1-Figure 5 , the scheme is further introduced below.

[0082] Figures 1 to 4 A high-density drilling fluid desanding and desilting cleaner includes: a vertical drum processor 1, a drive motor 2, a processor overflow port 3, a drilling fluid buffer tank 4, a liquid level sensor 5, a base 6, a centrifugal pump 7, a cleaning vibrating screen 8, a cyclone inlet pipe 9, an electrical control cabinet 10, a desilting cyclone 11, an inlet pipe ball valve 12, a cyclone bracket 13, a cyclone overflow pipe 14, an overflow pipe ball valve 15, a support spring 16, a lifting device 17, a processor inlet pipe 18 and a butterfly valve 19.

[0083] The vertical drum processor 1 is fixed on the base 6 and is located above the rear side of the cleaning vibrating screen 8; the cleaning vibrating screen 8 is fixed on the base 6 by a support spring 16; the lifting device 17 is fixed on the base 6 and is used to adjust the inclination angle of the cleaning vibrating screen 8, and the adjustment range is -2° to +6°; the drilling fluid buffer tank 4 is fixed on the base 6 and is connected to the processor overflow port 3; the centrifugal pump 7 is fixed on the base 6, the inlet of the centrifugal pump 7 is connected to the drilling fluid buffer tank 4, and the outlet of the centrifugal pump 7 is connected to the cyclone The cyclone inlet pipe 9 is connected; the cyclone inlet pipe 9 is fixed on the cyclone bracket 13 and connected to one end of the inlet pipe ball valve 12; the cyclone bracket 13 is fixed on the base 6; the desilting cyclone 11 is fixed on the cyclone bracket 13, and the cyclone inlet of the desilting cyclone 11 is connected to the other end of the inlet pipe ball valve 12; the cyclone overflow port of the desilting cyclone 11 is connected to one end of the overflow pipe ball valve 15; the cyclone overflow pipe 14 is fixed on the cyclone bracket 13 and connected to the other end of the overflow pipe ball valve 15. The liquid level sensor 5 is fixed on the drilling fluid buffer tank 4, and the power line and control line of the liquid level sensor 5 are led out from the electrical control cabinet 10. The electrical control cabinet 10 is fixed on the base 6; the electrical control cabinet 10 provides power for the driving motor 2, the centrifugal pump 7 motor, and the liquid level sensor 5, and detects the signal sent by the liquid level sensor 5, determines the liquid level in the drilling fluid buffer tank 4, and controls the speed of the centrifugal pump 7 motor to keep the liquid level in the drilling fluid buffer tank 4 balanced. The butterfly valve 19 is installed on the drilling fluid buffer tank 4 and is used to empty the drilling fluid buffer tank 4 after shutdown.

[0084] refer to Figure 5 The present invention provides a high-density drilling fluid desanding and desilting cleaner, which performs graded treatment on high-density drilling fluid. The high-density drilling fluid enters the vertical drum processor 1 from the processor inlet pipe 18, first separates large-particle cuttings and part of the barite above 40μm, reduces the density and viscosity of the overflow drilling fluid, increases the density difference between the cuttings and the drilling fluid, and the bottom flow enters the clean vibrating screen 8 for screening, removes the large-particle cuttings, and recovers the barite and drilling fluid in the bottom flow. The overflow drilling fluid enters the drilling fluid buffer tank 4, and the centrifugal pump 7 transports the overflow drilling fluid to the desilting cyclone 11 to separate the solid phase particles above 20μm. The solid phase particles larger than 20μm in the high-density drilling fluid are removed.

[0085] In order to ensure that the high-density drilling fluid desanding and desilting cleaner operates uninterruptedly, the control system in the electrical control cabinet 10 determines the liquid level in the drilling fluid buffer tank 4 by detecting the signal sent by the liquid level sensor 5, controls the motor speed of the centrifugal pump 7, and keeps the liquid level in the drilling fluid buffer tank 4 balanced, thereby achieving continuous operation of the high-density drilling fluid desanding and desilting cleaner.

[0086] Preferably, the number of the desilting cyclones 11 fixed on the cyclone bracket 13 can be adjusted according to actual use requirements.

[0087] The present invention also provides a vertical drum processor, referring to Figure 6 and Figure 7 The vertical drum processor 1 comprises: a power assembly, a vertical drum 23, a vertical screw pusher 24 and a processor liquid inlet pipe 18;

[0088] The vertical screw pusher 24 is arranged in the vertical drum 23, and an annular cavity is formed between the vertical screw pusher 24 and the vertical drum 23; the spiral blade 42 of the vertical screw pusher 24 is located in the annular cavity and directed downward; the output end of the power assembly can drive the vertical screw pusher 24 and the vertical drum 23 to rotate;

[0089] A discharge port 26 is provided in the middle of the vertical screw pusher 24, and the outlet of the processor liquid inlet pipe 18 cooperates with the discharge port 26; a slag discharge port 36 is provided at the lower part of the side wall of the vertical drum 23, and a liquid discharge port 28 is provided at the upper part of the side wall and / or the top surface of the vertical drum 23.

[0090] It should be noted that the high-density drilling fluid containing a solid phase is introduced into the vertical screw pusher 24 through the processor liquid inlet pipe 18, and the high-density drilling fluid containing a solid phase is introduced into the annular cavity formed between the vertical screw pusher 24 and the vertical drum 23 through the discharge port 26 opened by the vertical screw pusher 24. The vertical screw pusher 24 rotates driven by the power component, and the spiral blades 42 of the vertical screw pusher 24 stir the high-density drilling fluid containing a solid phase at a high speed to reduce the viscosity and shear force of the high-density drilling fluid. Under the action of its own gravity and the push of the spiral blades 42, the large particles of solid phase in the high-density drilling fluid are quickly discharged through the slag discharge port 36 set at the lower part of the side wall of the vertical drum 23, and the drilling fluid separated from the large particles of solid phase is discharged from the discharge port 28 opened on the upper part of the side wall and / or the top surface of the vertical drum 23, thereby achieving the purpose of separating the large particles of solid phase in the high-density drilling fluid.

[0091] It should also be noted that the spiral blades 42 of the vertical spiral pusher 24 , driven by the power assembly, can guide the solid phase in the high-density drilling fluid downward and push the solid phase out of the slag discharge port 36 .

[0092] It is worth noting that: 1. The large solid particles refer to rock fragments larger than or equal to 40 μm. 2. The drainage port 28 is provided on the upper side wall and / or the top surface of the vertical drum 23 to increase the discharge amount of drilling fluid for separating large solid particles.

[0093] In the embodiment of the present invention, a vertical spiral pusher is arranged in the vertical drum, and an annular cavity is formed between the vertical spiral pusher and the vertical drum; the spiral blades of the vertical spiral pusher are located in the annular cavity and guided downward; the output end of the power assembly can drive the vertical spiral pusher and the vertical drum to rotate; a discharge port is provided in the middle of the vertical spiral pusher, and the outlet of the liquid inlet pipe cooperates with the discharge port; a slag discharge port is provided in the lower part of the side wall of the vertical drum, and a liquid discharge port is provided in the upper part of the side wall and / or the top surface of the vertical drum. Through the above-disclosed vertical cleaner for removing sand and mud from drilling fluid, high-density drilling fluid enters the annular cavity from the middle, and the viscosity and shear force of the high-density drilling fluid are reduced under the high-speed stirring of the spiral blades. The large particles of solid phase in the high-density drilling fluid are discharged from the slag discharge port provided at the lower part of the side wall of the vertical drum under the force of its own gravity and the push of the spiral blades of the vertical spiral pusher, thereby achieving the separation of the large particles of solid phase in the high-density drilling fluid. The drilling fluid with separated large particles of solid phase is discharged through the discharge port provided at the upper part of the side wall and / or the top surface of the vertical drum, thereby achieving the separation of the large particles of solid phase in the high-density drilling fluid and ensuring the discharge volume.

[0094] Specifically, the inner wall of the vertical drum 23 is a conical surface that is larger at the top and smaller at the bottom, the outer wall of the vertical spiral pusher 24 is a conical surface that is larger at the top and smaller at the bottom, the annular cavity is conical, and the spiral blade 42 is a cone that matches the annular cavity.

[0095] It should be noted that the inner wall of the vertical drum 23 is designed to be a conical surface that is larger at the top and smaller at the bottom, the outer wall of the vertical spiral pusher 24 is designed to be a conical surface that is larger at the top and smaller at the bottom, and the spiral blade 42 is designed to be a cone that matches the annular cavity, so as to better stir the high-density drilling fluid and effectively reduce the viscosity and shear force of the high-density drilling fluid.

[0096] Furthermore, the number of the discharge ports 26 is multiple and distributed along the circumference of the vertical screw pusher 24 , so as to facilitate the stirring and separation of the high-density drilling fluid. Preferably, the multiple discharge ports 26 are evenly distributed along the circumference of the vertical screw pusher 24 .

[0097] Further, it also includes: an inner partition 25;

[0098] The inner partition plate 25 is an annular structure, and the outer side wall of the inner partition plate 25 is fixedly connected to the inner side wall of the middle part of the vertical screw pusher 24;

[0099] The processor liquid inlet pipe 18 passes through the bottom of the vertical screw pusher 24 , and the outlet of the processor liquid inlet pipe 18 is higher than the inner partition 25 ; the shape of the inner side wall of the inner partition 25 matches the outer side wall of the processor liquid inlet pipe 18 .

[0100] It should be noted that the inner partition 25 is mainly used to guide the high-density drilling fluid from the outlet of the processor inlet pipe 18 to the outlet 26 in the middle of the vertical screw pusher 24, so as to facilitate subsequent stirring and separation in the annular cavity, and at the same time, it can effectively prevent the solid phase in the high-density drilling fluid from precipitating inside the cavity of the vertical screw pusher 24.

[0101] Further, it also includes: an outer shell 22;

[0102] The vertical drum 23 is rotatably disposed in the outer shell 22 .

[0103] It should be noted that an outer shell 22 is provided, which can be used for assembling the vertical drum 23 and collecting the separated rock cuttings and drilling fluid. The vertical drum 23 can rotate driven by the power assembly.

[0104] Further, it also includes: an outer partition 35;

[0105] The outer partition plate 35 is an annular structure, the outer side wall of the outer partition plate 35 is fixedly connected to the inner side wall of the outer shell 22 , and the inner side wall of the outer partition plate 35 cooperates with the outer wall of the vertical screw pusher 24 .

[0106] It should be noted that the large solid particles can be separated from the drilling fluid for separating the large solid particles by the external partition 35, thereby preventing the large solid particles from mixing with the drilling fluid for separating the large solid particles.

[0107] Specifically, the spiral blades of the vertical spiral pusher 24 are double spiral blades.

[0108] Specifically, the spiral blades of the vertical spiral pusher 24 are triple spiral blades with a pitch of 150 mm.

[0109] Specifically, the power assembly includes: a spline shaft 29, a differential 31, a torque limiter 32, an elastic pin coupling 33, a belt transmission device 34 and a drive motor 2;

[0110] One end of the spline shaft 29 is connected to the first end of the vertical screw pusher 24, and the other end is connected to the power assembly;

[0111] The drive motor 2 is connected to the first end of the differential 31 through the belt transmission device 34;

[0112] The torque limiter 32 and the elastic pin coupling 33 are installed at the second end of the differential 31 .

[0113] It should be noted that the driving motor 2 can drive the differential 31 to rotate through the belt transmission device 34, and the differential 31 drives the vertical drum 23 and the vertical screw pusher 24 to rotate.

[0114] Further, it also includes: a processor fixing frame 21, an outer shell 22, legs 38 and a shock absorbing seat 41;

[0115] The legs 38 are mounted on the processor fixing frame 21 to support the processor fixing frame 21, and the outer shell 22 is disposed inside the processor fixing frame 21;

[0116] The shock absorbing seat 41 is installed between the processor fixing frame 21 and the supporting leg 38 .

[0117] It should be noted that the shock-absorbing seat 41 is mainly used to reduce the vibration caused by the power component providing power and prevent the device from being displaced due to vibration.

[0118] To understand the above solution, refer to Figure 6 and Figure 7 , the scheme is further introduced below.

[0119] A vertical drum processor is mainly used to separate large-particle cuttings larger than 40μm, reduce the density and viscosity of overflow drilling fluid, increase the density difference between cuttings and drilling fluid, and ensure that the desilter can remove solid phases larger than 15μm in the overflow drilling fluid. In order to increase the processing capacity, the drum processor adopts a vertical structure.

[0120] The vertical drum processor 1 includes: a spiral blade 42, an outer shell 22, a vertical drum 23, a vertical spiral pusher 24, an inner partition 25, a discharge port 26, a first bearing 27, a drain port 28, a spline shaft 29, a second bearing 30, a differential 31, a torque limiter 32, an elastic pin coupling 33, a belt drive device 34, an outer partition 35, a slag discharge port 36, a third bearing 37, a support leg 38, a fourth bearing 39, a processor liquid inlet pipe 18, a shock absorber seat 41 and a spiral blade 42.

[0121] The processor fixing frame is fixed on the supporting legs, and supports the vertical roller processor and the side hanging motor.

[0122] The vertical drum processor outer shell has a liquid drain pipe welded to the upper part of the side surface and an outer partition welded to the middle of the interior.

[0123] Preferably, the outer shell of the vertical drum processor is an octagonal cylinder.

[0124] The vertical drum processor is connected to the output shaft of the differential through a spline shaft, and has evenly distributed drainage ports on the large end surface and the side surface.

[0125] Preferably, the vertical drum is a cone.

[0126] The vertical spiral pusher is connected to the output shaft of the differential through a spline shaft, an inner partition is welded inside, and evenly distributed discharge ports are opened on the outer side of the wall.

[0127] Preferably, it is a hollow cone.

[0128] The inner partition is welded to the inner circumference of the vertical spiral pusher.

[0129] Preferably, the inner partition is a circular plate with a circular hole in the middle.

[0130] The discharge ports are circular holes evenly distributed on the outer wall of the spiral pusher.

[0131] The liquid discharge port is located on the large end surface of the top of the vertical drum, and is a communicating hole between the large end surface and the side surface of the vertical drum.

[0132] One end of the spline shaft is connected to the vertical screw pusher, and the other end is connected to the belt pulley.

[0133] One end of the torque limiter is connected to the elastic pin coupling, and the other end is connected to the differential.

[0134] One end of the elastic pin coupling is connected to the torque limiter through a pin, and the other end is fixed.

[0135] One end of the belt transmission device is connected to the motor, and the other end is connected to the differential.

[0136] The motor is fixed on the processor fixing frame.

[0137] The outer partition plate is a circular ring plate welded to the circumference between the vertical drum and the outer shell.

[0138] The slag discharge port and the circular holes are evenly distributed on the outer wall of the lower end of the vertical drum.

[0139] The supporting legs are connected to the shock absorbing seat and are cylindrical in structure.

[0140] The shock-absorbing seat is fixed under the processor fixing frame.

[0141] The liquid inlet pipe is fixed under the processor fixing frame and is connected with the inner partition plate in the vertical screw pusher.

[0142] The spiral blades are welded on the vertical spiral pusher.

[0143] Preferably, the spiral blade is a double spiral structure.

[0144] It can be seen from the above technical scheme that in the vertical drum processor provided by the present invention, the motor and the differential of the vertical drum processor are on the same side, the differential has no auxiliary motor, the vertical drum is a conical structure, the outer shell is vertically mounted on the processor fixing frame, the drainage port is designed as a connecting hole between the large end face and the side of the vertical drum, and the spiral blade is a double spiral. When the vertical drum processor is working, the material enters the vertical spiral pusher through the liquid inlet pipe, and then enters between the vertical drum and the vertical spiral pusher through the discharge port. The high-speed stirring of the material by the double spiral blades reduces the viscosity and shear force of the high-density drilling fluid, and separates the large-particle rock cuttings above 40μm in the high-density drilling fluid. Under the action of the gravity of the rock cuttings themselves and the push of the double spiral blade vertical pusher, the large-particle rock cuttings are quickly discharged downward from the slag discharge port, greatly improving the processing capacity of the vertical drum processor, and the processed drilling fluid enters the outer shell upward, and then is discharged through the drainage pipe on the outer shell. It can be seen from the above that the present invention is suitable for high-density drilling fluid processing, has a large processing capacity, and has a compact structure and beautiful appearance.

[0145] The present application mainly reduces the viscosity and shear force of high-density drilling fluid by stirring the material at high speed with double helical blades, thereby separating large-particle rock cuttings in the high-density drilling fluid, and discharging the large-particle rock cuttings through the slag discharge port under the action of the rock cuttings' own gravity and the push of the double helical blades.

[0146] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0147] Embodiment 1:

[0148] Depend on Figure 6As shown in, the spiral blade 42 is fixed on the shock-absorbing seat 41 and connected to the support leg 38, supporting the vertical roller 23 and the vertical spiral pusher 24, and the drive motor 2 is suspended on the side. A drain pipe is welded on the side of the processor shell 22, and an outer partition 35 is welded in the middle of the inside. The vertical roller 23 is connected to the output shaft of the differential 31 through a spline shaft 29. The large end face and side of the vertical roller 23 have uniformly distributed drain ports 28. The vertical spiral pusher 24 is connected to the input shaft of the differential 31 through a spline shaft 29. An inner partition 25 is welded inside the vertical spiral pusher 24, and a uniformly distributed discharge port is opened on the outer side of the wall of the vertical spiral pusher 24 26, the inner partition 25 is welded to the inner circumference of the vertical screw pusher 24, the discharge port 26 is evenly distributed on the outer wall of the vertical screw pusher 24, the discharge port 28 is a through hole on the large end surface of the vertical drum 23, one end of the spline shaft 29 is connected to the vertical screw pusher 24, and the other end is connected to the belt transmission device 34, one end of the torque limiter 32 is connected to the elastic pin coupling 33, and the other end is connected to the differential 31, one end of the elastic pin coupling 33 is connected to the torque limiter 32, and the other end is fixed, one end of the belt transmission device 34 is connected to the drive motor 2, and the other end is connected to the differential 31, and the drive motor 2 is fixed on the spiral blade 42. The outer partition 35 is a circular plate, welded to the circumference between the vertical drum 23 and the outer shell 22, the slag discharge port 36 is evenly distributed on the outer wall of the lower end of the vertical drum 23, the legs 38 are connected to the shock-absorbing seat 41, fixed under the spiral blade 42, the processor liquid inlet pipe 18 is fixed under the spiral blade 42, and connected to the inner partition 25 in the vertical screw pusher 24. The spiral blade 42 is welded to the vertical screw pusher 24.

[0149] The vertical drum 23 components, the vertical screw pusher 24 components and the screw blade 42 are supported by the first bearing 27, the second bearing 30, the third bearing 37 and the fourth bearing 39 respectively.

[0150] Embodiment 2:

[0151] The basic structure of the vertical drum processor 1 in this embodiment is the same as that in the embodiment 1, the vertical drum 23 has only a cone section, and the cone angle of the cone section is 3°. The vertical screw pusher 24 also has only a cone section, and the cone angle is the same as that of the vertical drum 23. The spiral blade 42 on the vertical screw pusher 24 is a triple spiral structure, and the pitch is 150 mm.

[0152] Embodiment 3:

[0153] The basic structure of the vertical drum processor 1 in this embodiment is the same as that in Embodiment 1, except that the drainage port 28 is changed to a connecting hole on the large end surface and the side surface of the vertical drum 23. When draining, the liquid phase is discharged from the large end of the vertical drum 23 and the side surface of the vertical drum 23 into the outer shell 22 at the same time to ensure the drainage volume.

[0154] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0155] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0156] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-density drilling fluid desanding and desilting cleaner, characterized in that: include: A vertical drum processor (1), a cleaning vibrating screen (8) and a desilting cyclone (11); A processor liquid inlet pipe (18) is provided at the bottom of the vertical drum processor (1); the processor overflow port (3) of the vertical drum processor (1) is connected to the cyclone liquid inlet of the desilting cyclone (11), and the processor overflow port (3) is provided on the side wall of the vertical drum processor (1); the processor bottom flow port of the vertical drum processor (1) is connected to the cyclone liquid inlet of the cleaning vibrating screen (8); the cyclone bottom flow port of the desilting cyclone (11) is connected to the cyclone liquid inlet of the cleaning vibrating screen (8); It also comprises: a drilling fluid buffer box (4); a buffer box liquid inlet of the drilling fluid buffer box (4) is connected to the processor overflow port (3) of the vertical drum processor (1), and a buffer box liquid outlet of the drilling fluid buffer box (4) is connected to the cyclone liquid inlet of the desilting cyclone (11); It also comprises: a base (6), a support spring (16) and a lifting device (17); the cleaning vibration screen (8) is fixed to the base (6) via the support spring (16); the lifting device (17) is fixed to the base (6) and is used to adjust the inclination angle of the cleaning vibration screen (8); It also comprises: a centrifugal pump (7); a centrifugal pump liquid inlet of the centrifugal pump (7) is connected to a buffer tank liquid outlet of the drilling fluid buffer tank (4), and a centrifugal pump liquid outlet of the centrifugal pump (7) is connected to a cyclone liquid inlet of the desilting cyclone (11); The device also comprises: a liquid level sensor (5) and an electrical control cabinet (10); the liquid level sensor (5) is arranged on the drilling fluid buffer tank (4) and is used to detect the amount of drilling fluid in the drilling fluid buffer tank (4); the electrical control cabinet (10) can control the motor speed of the centrifugal pump (7) according to the detection signal of the liquid level sensor (5) so as to keep the liquid level in the drilling fluid buffer tank (4) balanced.

2. The high-density drilling fluid desanding and demuding cleaner according to claim 1, characterized in that: Also includes: Butterfly valve (19); The butterfly valve (19) is installed near the bottom of the drilling fluid buffer tank (4) and is used to drain the drilling fluid in the drilling fluid buffer tank (4).

3. The high-density drilling fluid desanding and demud removing cleaner according to claim 1 or 2, characterized in that: The vertical drum processor comprises: a power assembly, a vertical drum (23), a vertical screw pusher (24) and a processor liquid inlet pipe (18); The vertical screw pusher (24) is arranged in the vertical drum (23), and an annular cavity is formed between the vertical screw pusher (24) and the vertical drum (23); the spiral blades (42) of the vertical screw pusher (24) are located in the annular cavity and directed downward; the output end of the power assembly can drive the vertical screw pusher (24) and the vertical drum (23) to rotate; A discharge port (26) is provided in the middle of the vertical screw pusher (24), and the outlet of the processor liquid inlet pipe (18) cooperates with the discharge port (26); a slag discharge port (36) is provided in the lower part of the side wall of the vertical drum (23), and a liquid discharge port (28) is provided in the upper part of the side wall and / or the top surface of the vertical drum (23).

4. The high-density drilling fluid desanding and demud removing cleaner according to claim 3, characterized in that: The inner wall of the vertical drum (23) is a conical surface that is larger at the top and smaller at the bottom, the outer wall of the vertical spiral pusher (24) is a conical surface that is larger at the top and smaller at the bottom, the annular cavity is conical, and the spiral blade (42) is conical to match the annular cavity.

5. The high-density drilling fluid desanding and desilting cleaner according to claim 3, characterized in that: Also includes: Inner partition (25); The inner partition (25) is an annular structure, and the outer side wall of the inner partition (25) is fixedly connected to the middle inner side wall of the vertical screw pusher (24); The processor liquid inlet pipe (18) passes through the bottom of the vertical screw pusher (24); the outlet of the processor liquid inlet pipe (18) is higher than the inner partition (25); the shape of the inner side wall of the inner partition (25) matches the outer side wall of the processor liquid inlet pipe (18).

6. The high-density drilling fluid desanding and demud removing cleaner according to claim 3, characterized in that: Also includes: outer shell (22); The vertical drum (23) is rotatably disposed in the outer shell (22).

7. The high-density drilling fluid desanding and demud removing cleaner according to claim 6, characterized in that: Also included: an outer baffle (35); The outer baffle (35) is an annular structure, the outer side wall of the outer baffle (35) is fixedly connected to the inner side wall of the outer shell (22), and the inner side wall of the outer baffle (35) cooperates with the outer wall of the vertical screw pusher (24).

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