Drilling mud circulating purification and harmful gas isolation integrated treatment device

Abstract

The invention discloses a drilling mud circulation purification and harmful gas isolation integrated treatment device, and relates to the field of drilling mud treatment, and the drilling mud circulation purification and harmful gas isolation integrated treatment device comprises a pretreatment mechanism, a primary separation mechanism, a support frame, a connecting plate, a secondary treatment mechanism, a gas treatment mechanism and a support column. Slurry returned by drilling firstly enters the preliminary separation mechanism to remove large-particle impurities, then enters the pretreatment mechanism, is subjected to intermediate purification through vibration screening and cyclone separation, then enters the secondary treatment mechanism, and is subjected to solid-liquid fine separation through a centrifugal machine; harmful gas released in the whole process is collected to a gas treatment mechanism, gas-liquid separation and safe discharge are achieved, the slurry purification function and the gas treatment function are integrated in an integrated structure, the occupied area of equipment is reduced, the equipment is suitable for the working environment with the limited well site space, and through the three-stage purification technology, the vibrating screen, the cyclone set and the centrifugal machine are combined, and the working efficiency is improved. And efficient separation of solid-phase particles with different particle sizes is realized.

Description

Technical Field

[0001] This invention relates to drilling mud treatment technology, specifically to an integrated treatment device for drilling mud circulation purification and harmful gas isolation. Background Technology

[0002] In drilling operations, drilling mud (drilling fluid) plays a crucial role in carrying rock cuttings, stabilizing the wellbore, and cooling the drill bit. During the mud circulation process, it carries a large amount of formation rock cuttings and potentially harmful formation gases (such as hydrogen sulfide and methane). Therefore, efficient solid-liquid separation (purification) of the returned mud and effective isolation and treatment of harmful gases are key aspects of ensuring drilling safety, protecting the environment, reducing costs, and maintaining mud performance.

[0003] Currently, the mud purification system and gas treatment system commonly used on-site are usually separate and independent units. A typical mud purification process is as follows: the mud returned from the wellhead passes through a series of grading equipment such as a vibrating screen, desander, desilter, and centrifuge to remove solid particles of different sizes. These devices are usually distributed on the mud tank and connected by pipes, pumps and channels to form an open or semi-open process. The purification and gas treatment equipment are independent and connected by external pipes and pumps, resulting in a large number of connection points and potential leakage risks. This not only occupies valuable well site space but also increases the resistance and energy loss of mud transportation. Furthermore, the open process is not conducive to the centralized control of harmful gases.

[0004] To address the problems raised in the background art, those skilled in the art have proposed an integrated treatment device for drilling mud circulation purification and harmful gas isolation. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated treatment device for drilling mud circulation purification and harmful gas isolation, so as to solve the problems of separate and independent mud purification and gas treatment systems, large footprint, and easy leakage of harmful gases in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an integrated treatment device for drilling mud circulation purification and harmful gas isolation, comprising a pretreatment mechanism, a preliminary separation mechanism, a support frame, a connecting plate, a secondary treatment mechanism, a gas treatment mechanism, and a support column. The preliminary separation mechanism is located above the pretreatment mechanism, and the mud outlet of the preliminary separation mechanism is connected to the mud inlet at the top of the pretreatment mechanism, so that mud flows from the preliminary separation mechanism into the pretreatment mechanism. The secondary treatment mechanism is connected to the pretreatment mechanism through the connecting plate, and the discharge port of the pretreatment mechanism is connected to the inlet of the secondary treatment mechanism through a pipe. The support frame supports the pretreatment mechanism. The bottom of the pretreatment unit and the secondary treatment unit; the gas treatment unit is located above the secondary treatment unit and is fixedly connected to the secondary treatment unit through the support column; the gas treatment unit is provided with a gas inlet pipe, one end of which extends into the interior of the pretreatment unit to transport the harmful gases generated in the pretreatment unit to the gas treatment unit; the preliminary separation unit is used for preliminary treatment and separation of drilling mud; the pretreatment unit is used for medium and fine separation and purification of drilling mud; the secondary treatment unit is used for fine purification of drilling mud; and the gas treatment unit is used for separation and treatment of harmful gases generated during drilling and mud treatment.

[0007] Furthermore, the preliminary separation mechanism includes a preliminary separation tank, a drilling mud inlet, a guide plate, a filter screen, and a first installation handle. The preliminary separation tank is located at the top of the pretreatment mechanism, and the drilling mud inlet is located at the top of the preliminary separation tank. One end of the drilling mud inlet passes through the top of the preliminary separation tank and extends into the interior of the preliminary separation tank. The other end of the preliminary separation tank is connected to the drilling mud inlet pipe at the wellhead, and a manual gate valve is provided at the inlet.

[0008] Furthermore, the preliminary separation tank is characterized by having a guide plate inside, with multiple guide plates arranged inside the tank. Each guide plate is inclined, and a sedimentation chute is provided on the upper surface of each guide plate. A mud outlet is provided at the bottom of the preliminary separation tank. The filter screen is located inside the preliminary separation tank and above the mud outlet. The filter screen is movably connected to the preliminary separation tank. The first installation handle is located on the side of the filter screen near the outside of the preliminary separation tank for pulling the filter screen for replacement.

[0009] Furthermore, the pretreatment mechanism includes a treatment tank, a vibrating screen, a premixing tank, a mud booster pump, a hydrocyclone assembly, and a centrifugal sand pump. The treatment tank is located at the bottom of the primary separation tank, and a mud inlet is provided at the top of the treatment tank. The mud inlet is connected to the mud outlet at the top of the primary separation tank. The vibrating screen is located below the mud inlet and is used to vibrate and separate drill cuttings from the mud. The premixing tank is located below the vibrating screen. The feed inlet of the mud booster pump is located at the bottom of the premixing tank. The hydrocyclone assembly is located at the discharge outlet of the mud booster pump. The centrifugal sand pump is located on the upper surface of the connecting plate, and the feed inlet of the centrifugal sand pump is connected to the outlet of the hydrocyclone assembly. A discharge pipe is provided on the side of the centrifugal sand pump, and the discharge pipe is connected to the secondary treatment mechanism.

[0010] Furthermore, the hydrocyclone assembly includes an inlet distributor, an overflow port, and an underflow port. The inlet distributor is used to receive high-pressure mud pumped by the mud booster pump and distribute it to each hydrocyclone for separation and purification through multiple manual ball valves. The overflow port is connected to the feed port of the centrifugal sand pump, and the underflow port is used to discharge the separated coarse particles.

[0011] Furthermore, a drive motor is installed at the bottom of the premixing tank, and an mounting plate is installed at the bottom of the mud booster pump and the drive motor. The mounting plate is located between the mud booster pump and the hydrocyclone assembly and is fixedly connected to the mud booster pump and the drive motor. Several feed holes are opened at the top of the premixing tank. Several connecting ropes are installed inside the premixing tank, and the number of connecting ropes is the same as the number of feed holes. One end of each connecting rope is fixedly connected to the bottom of the premixing tank. A float is installed at the top of each connecting rope. The diameter of the float is the same as the diameter of the feed hole, and the float and the feed hole are matched. The float is used to seal the feed hole under the action of buoyancy. An agitator is installed inside the premixing tank, and the bottom of the agitator is fixedly connected to the output shaft of the drive motor.

[0012] Furthermore, the secondary processing mechanism includes a secondary processing tank, a centrifuge, a liquid discharge pipe, a bottom placement plate, and a collection bin. The secondary processing tank is located on the side of the connecting plate away from the processing tank. The bottom placement plate is located inside the secondary processing tank. The centrifuge is located on top of the bottom placement plate. The collection bin is located below the bottom placement plate, and one side of the collection bin extends through the secondary processing tank. The collection bin is movably connected to the secondary processing tank. A second installation handle is provided on the side of the collection bin near the outside of the secondary processing tank. The inlet of the centrifuge is connected to the discharge pipe. A liquid discharge pipe is provided on one side of the centrifuge, which passes through the secondary processing tank. A solid waste outlet is provided at the bottom of the centrifuge, which passes through the bottom placement plate and extends above the collection bin.

[0013] Furthermore, the gas processing mechanism includes a gas separator, a gas inlet pipe, an exhaust pipe, a return pipe, a baffle plate, an inclined plate, and rotating blades. The gas separator is located at the top of the support column. One end of the gas inlet pipe is located inside the gas separator, and the other end is located inside the processing tank. The exhaust pipe is located at the top of the gas separator, and the other end of the exhaust pipe is connected to a high-point vent pipe to discharge to a safe area or directly connected to a combustion catalytic furnace. One end of the return pipe is located below the interior of the processing tank, and the other end is located at the top of the processing tank and extends into the interior of the processing tank.

[0014] Furthermore, the baffle is located inside the gas separator tank, and there are several baffles, each of which is inclined. The rotating blade is located inside the gas separator tank and is rotatably connected to the bottom of the gas separator tank. The inclined plate is located at the bottom of the gas separator tank and is inclined, with the inclined direction of the inclined plate towards the return pipe.

[0015] Compared with the prior art, the drilling mud circulation purification and harmful gas isolation integrated treatment device provided by the present invention has the following beneficial effects:

[0016] 1. The drilling mud returned first enters the preliminary separation unit to remove large particles of impurities, and then enters the pretreatment unit for intermediate purification through vibrating screen and hydrocyclone separation. After that, the mud enters the secondary treatment unit, where centrifuges achieve fine solid-liquid separation. At the same time, harmful gases released throughout the process are collected to the gas treatment unit to achieve gas-liquid separation and safe discharge. The mud purification and gas treatment functions are integrated into a single structure, reducing the equipment footprint and making it suitable for working environments with limited well site space. Furthermore, through a three-stage purification process, combined with vibrating screens, hydrocyclone groups, and centrifuges, efficient separation of solid particles of different sizes is achieved.

[0017] 2. Harmful gases escaping from the treatment tank are introduced into a gas separator tank located at the top of the device through a gas inlet pipe. Upon entering the tank, the gas first encounters a series of inclined baffles. These baffles make the gas flow path tortuous, not only prolonging the residence time of the gas within the tank but also causing multiple collisions and contacts between the gas and the liquid film formed on the tank wall, achieving initial gas-liquid separation. To further improve separation efficiency, a freely rotating blade assembly is installed at the bottom of the gas separator tank. As the gas flows through, it drives the blades to rotate, enhancing the turbulence effect and causing the entrained liquid droplets in the gas to be subjected to centrifugal force. The gas is thrown against the tank wall and coalesces as it falls. The bottom of the tank is designed as a slope sloping towards the return pipe. The separated liquid collects along the slope and automatically flows back to the treatment tank through the return pipe, realizing liquid recovery. The fully separated gas is discharged from the exhaust pipe on the top of the tank. The exhaust pipe can be connected to a high-point vent pipe to release the harmless gas to a safe atmospheric area; or it can be directly connected to a combustion catalytic furnace to burn the combustible and harmful gases, completely eliminating safety hazards. The entire gas treatment process is completed in a closed system, effectively preventing the leakage of harmful gases and ensuring the health of personnel and the safety of the well site. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention;

[0021] Figure 3 This is a cross-sectional view of the pretreatment mechanism in this invention;

[0022] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 For the present invention Figure 3 Enlarged view of section B in the middle.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Pretreatment Mechanism; 101. Treatment Tank; 102. Vibrating Screen; 103. Premixing Tank; 104. Mud Booster Pump; 105. Drive Motor; 106. Mounting Plate; 107. Hydrocyclone Assembly; 108. Centrifugal Sand Pump; 109. Discharge Pipe; 110. Connecting Rope; 111. Float; 112. Agitator Wheel; 2. Primary Separation Mechanism; 201. Primary Separation Tank; 202. Drilling Mud Inlet; 203. Guide Plate; 204. Filter Screen; 205. 1. First mounting handle; 3. Support frame; 4. Connecting plate; 5. Secondary processing mechanism; 501. Secondary processing tank; 502. Centrifuge; 503. Liquid discharge pipe; 504. Bottom placement plate; 505. Collection bin; 506. Second mounting handle; 6. Gas processing mechanism; 601. Gas separator; 602. Gas inlet pipe; 603. Exhaust pipe; 604. Return pipe; 605. Baffle plate; 606. Inclined plate; 607. Rotating blade; 7. Support column. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] As attached Figure 1 To be continued Figure 5 As shown:

[0028] Example 1:

[0029] This invention provides an integrated treatment device for drilling mud circulation purification and harmful gas isolation, including a pretreatment mechanism 1, a preliminary separation mechanism 2, a support frame 3, a connecting plate 4, a secondary treatment mechanism 5, a gas treatment mechanism 6, and a support column 7. The preliminary separation mechanism 2 is located above the pretreatment mechanism 1, and the mud outlet of the preliminary separation mechanism 2 is connected to the mud inlet at the top of the pretreatment mechanism 1, so that mud flows from the preliminary separation mechanism 2 into the pretreatment mechanism 1. The secondary treatment mechanism 5 is connected to the pretreatment mechanism 1 through the connecting plate 4, and the discharge port of the pretreatment mechanism 1 is connected to the inlet of the secondary treatment mechanism 5 through a pipe. The support frame 3 supports the pretreatment mechanism 1 and the secondary treatment mechanism 6. The bottom of the secondary treatment unit 5; the gas treatment unit 6 is located above the secondary treatment unit 5 and is fixedly connected to the secondary treatment unit 5 through the support column 7; the gas treatment unit 6 is provided with a gas inlet pipe 602, one end of which extends into the interior of the pretreatment unit 1 to transport the harmful gases generated in the pretreatment unit 1 to the gas treatment unit 6; the preliminary separation unit 2 is used for preliminary treatment and separation of drilling mud; the pretreatment unit 1 is used for medium and fine separation and purification of drilling mud; the secondary treatment unit 5 is used for fine purification of drilling mud; and the gas treatment unit 6 is used for separation and treatment of harmful gases generated during drilling and mud treatment.

[0030] The drilling mud first enters the preliminary separation unit 2 to remove large particles of impurities, and then enters the pretreatment unit 1 for intermediate purification through vibrating screening and cyclone separation. After that, the mud enters the secondary treatment unit 5, where centrifuge 502 achieves fine solid-liquid separation. At the same time, the harmful gases released throughout the process are collected to the gas treatment unit 6 to achieve gas-liquid separation and safe discharge.

[0031] In one embodiment of the present invention, the preliminary separation mechanism 2 includes a preliminary separation tank 201, a drilling mud inlet 202, a guide plate 203, a filter screen 204, and a first installation handle 205. The preliminary separation tank 201 is located at the top of the pretreatment mechanism 1, and the drilling mud inlet 202 is located at the top of the preliminary separation tank 201. One end of the drilling mud inlet 202 passes through the top of the preliminary separation tank 201 and extends into the interior of the preliminary separation tank 201. The other end of the preliminary separation tank 201 is connected to the mud inlet pipe at the drilling wellhead, and a manual gate valve is provided at the inlet. The guide plate 203 is provided inside the preliminary separation tank 201. The primary separation tank 201 has multiple guide plates 203 inside, each of which is inclined and has a sedimentation chute on its upper surface. The guide plates 203 are used to guide the flow direction of the mud, prolong the residence time of the mud in the tank, and promote the sedimentation of large particles. The primary separation tank 201 has a mud outlet at the bottom. The filter screen 204 is located inside the primary separation tank 201 and above the mud outlet. The filter screen 204 is movably connected to the primary separation tank 201. The first installation handle 205 is located on the side of the filter screen 204 near the outside of the primary separation tank 201 and is used to pull the filter screen 204 for replacement.

[0032] During operation, drilling mud enters the drilling mud inlet 202 at the top of the preliminary separation tank 201 through the mud inlet pipe from the drilling wellhead. A manual gate valve is installed at the inlet for adjusting the flow rate and emergency shut-off. After entering the tank, the mud is guided by multiple inclined guide plates 203 inside, flowing downwards in a tortuous path. The design of the guide plates 203 prolongs the residence time of the mud in the tank, and gravity causes the denser solid particles to gradually settle to the bottom of the tank. Large particles of impurities in the mud collide and settle continuously during the flow, achieving preliminary solid-liquid separation. A mud outlet is located at the bottom of the tank, and a movable filter screen 204 is installed above the outlet. This screen is made of high-strength, wear-resistant polyurethane composite material, which can further intercept larger solids that have not been settled. When the screen is clogged and affects the filtration efficiency, the operator can pull it out through the first installation handle 205 on the side of the tank for cleaning or replacement. Maintenance is simple and quick. The mud after preliminary separation flows from the outlet into the pretreatment mechanism 1 below to continue the subsequent purification process.

[0033] In one embodiment of the present invention, the pretreatment mechanism 1 includes a treatment tank 101, a vibrating screen 102, a premixing tank 103, a mud booster pump 104, a hydrocyclone assembly 107, and a centrifugal sand pump 108. The treatment tank 101 is located at the bottom of the preliminary separation tank 201, and a mud inlet is provided at the top of the treatment tank 101, which is connected to the mud outlet at the top of the preliminary separation tank 201. The vibrating screen 102 is located below the mud inlet and is used to vibrate and separate drill cuttings from the mud. The premixing tank 103 is located below the vibrating screen 102, and the feed inlet of the mud booster pump 104 is located in the premixing tank 103. At the bottom, the hydrocyclone assembly 107 is located at the outlet of the mud booster pump 104, and the centrifugal sand pump 108 is located on the upper surface of the connecting plate 4. The inlet of the centrifugal sand pump 108 is connected to the outlet of the hydrocyclone assembly 107. A discharge pipe is provided on the side of the centrifugal sand pump 108, which is connected to the secondary treatment mechanism 5. The hydrocyclone assembly 107 includes an inlet distributor, an overflow port, and a bottom outlet. The inlet distributor is used to receive the high-pressure mud pumped by the mud booster pump 104 and distribute it to each hydrocyclone for separation and purification through multiple manual ball valves. The overflow port is connected to the inlet of the centrifugal sand pump 108. The bottom outlet is used to discharge the separated coarse particles. A drive motor 105 is installed at the bottom of the premixing tank 103. A mounting plate 106 is installed at the bottom of the mud booster pump 104 and the drive motor 105. The mounting plate 106 is located between the mud booster pump 104 and the hydrocyclone assembly 107, and is fixedly connected to the mud booster pump 104 and the drive motor 105. Several feed holes are opened at the top of the premixing tank 103. Several connecting ropes 110 are installed inside the premixing tank 103, the number of which is the same as the number of feed holes. One end of each connecting rope 110 is connected to the premixing tank 103. 03 The bottom of the internal connection is fixed. Each connecting rope 110 is equipped with a float 111 at the top. The diameter of the float 111 is the same as the diameter of the feed hole, and the float 111 matches the feed hole. The float 111 is used to seal the feed hole under the action of buoyancy. The connecting rope 110 and the float 111 form an automatic sealing structure. When the liquid level in the premixing tank 103 rises, the float 111 floats up under the buoyancy to seal the feed hole, preventing the slurry from flowing back or the gas from escaping. The premixing tank 103 is equipped with an agitator 112. The bottom of the agitator 112 is fixedly connected to the output shaft of the drive motor 105.

[0034] During operation, the mud from the preliminary separation unit 2 first enters the mud inlet at the top of the processing tank 101 and immediately falls onto the vibrating screen 102 below. The vibrating screen 102 uses high-frequency vibration to evenly spread the mud on the screen surface, effectively separating medium-sized drill cuttings. The oversize material is discharged as solid waste, while the undersize mud falls into the premixing tank 103 located below. The premixing tank 103 is designed with a unique automatic sealing structure: several feed holes are opened at the top of the tank, and a float 111 is suspended below each hole by a connecting rope 110. When the liquid level in the tank rises, the float 111 rises under the action of buoyancy, tightly blocking the feed hole and preventing mud backflow or gas escape; when the liquid level drops, the float 111 falls down, allowing the mud to continue to flow. The slurry continues to flow in. At the bottom of the tank, there is a stirring wheel 112 driven by a drive motor 105, which continuously stirs the slurry to maintain its uniform mixing state and prevent solid particles from settling. The slurry at the bottom of the premixing tank 103 is drawn by the slurry booster pump 104 and pumped to the hydrocyclone group 107. The hydrocyclone group 107 is composed of multiple hydrocyclones connected in parallel. The flow rate of each unit is controlled by the liquid inlet distributor and the manual ball valve. The high-pressure slurry enters the hydrocyclone tangentially. Under the action of centrifugal force generated by the strong rotational flow, the coarser particles are thrown to the wall and discharged through the bottom outlet, while the finer particles and liquid flow out from the top overflow outlet. The overflow liquid is received by the centrifugal sand pump 108 and transported to the secondary treatment unit 5 through the discharge pipe to complete the intermediate purification process.

[0035] Working principle: Drilling mud enters the primary separation tank 201 from the wellhead through the mud inlet pipe. The flow rate is controlled by a manual gate valve. The mud flows under the guidance of the guide plate 203. Large particles of impurities settle under gravity and enter the treatment tank 101 through the mud outlet at the bottom. The filter screen 204 can intercept larger solids. When it is clogged, it can be quickly pulled out for cleaning or replacement through the first installation handle 205. In the pretreatment mechanism 1, the vibrating screen 102 performs secondary screening of the mud. Fine particles enter the premixing tank 103. The mud booster pump 104 transports the mud to the hydrocyclone group 107. Under the action of centrifugal force, medium and fine particles are separated. The overflow liquid is pumped into the secondary treatment mechanism 5 by the centrifugal sand pump 108, and the underflow solid phase is discharged from the system.

[0036] Example 2:

[0037] This embodiment is basically the same as the previous embodiment, except that the secondary processing mechanism 5 includes a secondary processing tank 501, a centrifuge 502, a liquid discharge pipe 503, a bottom placement plate 504, and a collection bin 505. The secondary processing tank 501 is located on the side of the connecting plate 4 away from the processing tank 101, the bottom placement plate 504 is located inside the secondary processing tank 501, the centrifuge 502 is located on top of the bottom placement plate 504, and the collection bin 505 is located below the bottom placement plate 504, with one side of the collection bin 505 penetrating through the secondary processing tank 101. The primary treatment box 501 and the collection bin 505 are movably connected to the secondary treatment box 501. The collection bin 505 is provided with a second installation handle 506 on the side near the outside of the secondary treatment box 501. The feed inlet of the centrifuge 502 is connected to the discharge pipe 109. A liquid discharge pipe 503 is provided on one side of the centrifuge 502. The liquid discharge pipe 503 passes through the secondary treatment box 501. A solid waste outlet is provided at the bottom of the centrifuge 502. The solid waste outlet passes through the bottom placement plate 504 and extends to the top of the collection bin 505.

[0038] Working Principle: The mud from the pretreatment unit 1 enters the centrifuge 502 inside the secondary treatment tank 501 through a pipeline. This centrifuge 502 typically employs a horizontal screw discharge design, utilizing the powerful centrifugal force generated by high-speed rotation to completely separate the fine solid particles from the liquid in the mud. The separated clear liquid (mainly water and trace amounts of fine particles) is discharged through the side liquid outlet pipe 503, which can be directly returned to the drilling circulation system or stored in a storage tank for later use. The solid waste separated by the centrifuge 502 (mainly extremely fine rock cuttings and colloidal particles) falls through the solid waste outlet at its bottom. Below the outlet is a pull-out collection bin 505, where the solid waste falls directly into for temporary storage. The collection bin 505 is movably connected to the tank via a sliding rail. When the waste accumulates to a certain amount, the operator can grasp the second installation handle 506 on the side of the bin to easily pull the entire collection bin 505 out of the tank along the guide rail for cleaning or transfer. This design achieves continuous solid waste collection and treatment, significantly reducing system downtime.

[0039] Example 3:

[0040] This embodiment is basically the same as the previous embodiment, except that the gas processing mechanism 6 includes a gas separator 601, a gas inlet pipe 602, an exhaust pipe 603, a return pipe 604, a baffle plate 605, an inclined plate 606, and a rotating blade 607. The gas separator 601 is located at the top of the support column 7. One end of the gas inlet pipe 602 is located inside the gas separator 601, and the other end is located inside the processing tank 101. The exhaust pipe 603 is located at the top of the gas separator 601, and the other end of the exhaust pipe 603 is connected to a high-point vent pipe to discharge to a safe area or directly connected to the combustion catalytic furnace. One end of the return pipe 604 is located inside the lower part of the processing tank 101, and the other end of the return pipe 604 is located at the top of the processing tank 101 and extends into the processing tank 101. The baffle 605 is located inside the gas separator 601, and several baffles 605 are provided. Each baffle 605 is inclined. The rotating blade 607 is located inside the gas separator 601 and is rotatably connected to the bottom of the gas separator 601. The inclined plate 606 is located at the bottom of the gas separator 601 and is inclined. The inclined direction of the inclined plate 606 is towards the return pipe 604.

[0041] Working principle: Harmful gases escaping from treatment tank 101 are introduced into gas separation tank 601 located at the top of the device through gas inlet pipe 602. After entering the tank, the gas first encounters a series of inclined baffles 605. The baffles 605 make the gas flow path tortuous, which not only prolongs the residence time of the gas in the tank, but also causes the gas to collide and contact with the liquid film formed on the tank wall multiple times, achieving preliminary gas-liquid separation. To further improve the separation efficiency, the bottom of gas separation tank 601 is equipped with a freely rotating blade assembly. When the gas flows through, it drives the blades to rotate, enhancing the turbulence effect and causing the liquid droplets entrained in the gas to separate. Under the force of gravity, the gas is thrown against the tank wall and falls. The bottom of the tank is designed as a slope sloping towards the return pipe 604. The separated liquid collects along the slope and automatically flows back to the treatment tank 101 through the return pipe 604, realizing liquid recovery. The fully separated gas is discharged from the exhaust pipe 603 on the top of the tank. The exhaust pipe 603 can be connected to a high-point vent pipe to discharge the harmlessly treated gas to a safe atmospheric area; or it can be directly connected to a combustion catalytic furnace to burn the combustible and harmful gases, completely eliminating safety hazards. The entire gas treatment process is completed in a closed system, effectively preventing the leakage of harmful gases and ensuring the health of personnel and the safety of the well site.

[0042] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An integrated treatment device for drilling mud circulation purification and harmful gas isolation, characterized in that, The system includes a pretreatment mechanism (1), a preliminary separation mechanism (2), a support frame (3), a connecting plate (4), a secondary treatment mechanism (5), a gas treatment mechanism (6), and a support column (7). The preliminary separation mechanism (2) is located above the pretreatment mechanism (1), and the mud outlet of the preliminary separation mechanism (2) is connected to the mud inlet at the top of the pretreatment mechanism (1) so that mud flows from the preliminary separation mechanism (2) into the pretreatment mechanism (1). The secondary treatment mechanism (5) is connected to the pretreatment mechanism (1) through the connecting plate (4), and the discharge port of the pretreatment mechanism (1) is connected to the inlet of the secondary treatment mechanism (5) through a pipe. The support frame (3) supports the bottom of the pretreatment mechanism (1) and the secondary treatment mechanism (5). The gas treatment mechanism (6) is located above the secondary treatment mechanism (5) and is fixedly connected to the secondary treatment mechanism (5) through the support column (7); the gas treatment mechanism (6) is provided with a gas inlet pipe (602), one end of which extends into the pretreatment mechanism (1) to transport the harmful gas generated in the pretreatment mechanism (1) to the gas treatment mechanism (6); the preliminary separation mechanism (2) is used to perform preliminary treatment and separation of drilling mud; the pretreatment mechanism (1) is used to perform medium and fine separation and purification of drilling mud; the secondary treatment mechanism (5) is used to perform fine purification of drilling mud; and the gas treatment mechanism (6) is used to separate and treat the harmful gases generated during drilling and mud treatment.

2. The integrated treatment device for drilling mud circulation purification and harmful gas isolation according to claim 1, characterized in that, The preliminary separation mechanism (2) includes a preliminary separation tank (201), a drilling mud inlet (202), a guide plate (203), a filter screen (204), and a first installation handle (205). The preliminary separation tank (201) is located at the top of the pretreatment mechanism (1). The drilling mud inlet (202) is located at the top of the preliminary separation tank (201). One end of the drilling mud inlet (202) passes through the top of the preliminary separation tank (201) and extends into the interior of the preliminary separation tank (201). The other end of the preliminary separation tank (201) is connected to the drilling wellhead slurry pipe, and a manual gate valve is provided at the inlet.

3. The integrated treatment device for drilling mud circulation purification and harmful gas isolation according to claim 2, characterized in that, The preliminary separation tank (201) is provided with a guide plate (203). Multiple guide plates (203) are provided inside the preliminary separation tank (201). Each guide plate (203) is inclined and has a sedimentation chute on its upper surface. The bottom of the preliminary separation tank (201) has a mud outlet. The filter screen (204) is located inside the preliminary separation tank (201) and above the mud outlet. The filter screen (204) is movably connected to the preliminary separation tank (201). The first installation handle (205) is located on the side of the filter screen (204) near the outside of the preliminary separation tank (201) and is used to pull the filter screen (204) for replacement.

4. The integrated treatment device for drilling mud circulation purification and harmful gas isolation according to claim 2, characterized in that, The pretreatment unit (1) includes a treatment tank (101), a vibrating screen (102), a premixing tank (103), a mud booster pump (104), a hydrocyclone assembly (107), and a centrifugal sand pump (108). The treatment tank (101) is located at the bottom of the preliminary separation tank (201). A mud inlet is provided at the top of the treatment tank (101), and the mud inlet is connected to the mud outlet at the top of the preliminary separation tank (201). The vibrating screen (102) is located below the mud inlet and is used to vibrate and separate drill cuttings from the mud. The premix tank (103) is located below the vibrating screen (102). The inlet of the mud booster pump (104) is located at the bottom of the premix tank (103). The hydrocyclone assembly (107) is located at the outlet of the mud booster pump (104). The centrifugal sand pump (108) is located on the upper surface of the connecting plate (4), and the inlet of the centrifugal sand pump (108) is connected to the outlet of the hydrocyclone assembly (107). The centrifugal sand pump (108) has a discharge pipe on its side, and the discharge pipe is connected to the secondary processing mechanism (5).

5. The integrated treatment device for drilling mud circulation purification and harmful gas isolation according to claim 4, characterized in that, The hydrocyclone assembly (107) includes an inlet distributor, an overflow port, and an underflow port. The inlet distributor is used to receive high-pressure mud pumped by the mud booster pump (104) and distribute it to each hydrocyclone for separation and purification through multiple manual ball valves. The overflow port is connected to the feed port of the centrifugal sand pump (108), and the underflow port is used to discharge the separated coarse particles.

6. The integrated treatment device for drilling mud circulation purification and harmful gas isolation according to claim 4, characterized in that, The premixing tank (103) is equipped with a drive motor (105) at its bottom. The mud booster pump (104) and the drive motor (105) are equipped with mounting plates (106) at their bottoms. The mounting plates (106) are located between the mud booster pump (104) and the hydrocyclone assembly (107). The mounting plates (106) are fixedly connected to the mud booster pump (104) and the drive motor (105). The premixing tank (103) has several feed holes at its top. The premixing tank (103) has several connecting ropes (110) inside it. The number of feed holes is the same as the number of feed holes. One end of the connecting rope (110) is fixedly connected to the bottom of the premix tank (103). Each connecting rope (110) is equipped with a float (111) at the top. The diameter of the float (111) is the same as the diameter of the feed hole, and the float (111) matches the feed hole. The float (111) is used to seal the feed hole under the action of buoyancy. The premix tank (103) is equipped with a stirring wheel (112). The bottom of the stirring wheel (112) is fixedly connected to the output shaft of the drive motor (105).

7. The integrated treatment device for drilling mud circulation purification and harmful gas isolation according to claim 4, characterized in that, The secondary processing unit (5) includes a secondary processing tank (501), a centrifuge (502), a liquid discharge pipe (503), a bottom placement plate (504), and a collection bin (505). The secondary processing tank (501) is located on the side of the connecting plate (4) away from the processing tank (101). The bottom placement plate (504) is located inside the secondary processing tank (501). The centrifuge (502) is located on top of the bottom placement plate (504). The collection bin (505) is located below the bottom placement plate (504), and one side of the collection bin (505) extends through the secondary processing tank (501). The collection chamber (505) is movably connected to the secondary treatment box (501). A second installation handle (506) is provided on the side of the collection chamber (505) near the outside of the secondary treatment box (501). The inlet of the centrifuge (502) is connected to the discharge pipe (109). A liquid discharge pipe (503) is provided on one side of the centrifuge (502). The liquid discharge pipe (503) passes through the secondary treatment box (501). A solid waste outlet is provided at the bottom of the centrifuge (502). The solid waste outlet passes through the bottom placement plate (504) and extends to the top of the collection chamber (505).

8. The integrated treatment device for drilling mud circulation purification and harmful gas isolation according to claim 4, characterized in that, The gas processing mechanism (6) includes a gas separator (601), a gas inlet pipe (602), an exhaust pipe (603), a return pipe (604), a baffle plate (605), an inclined plate (606), and a rotating blade (607). The gas separator (601) is located at the top of the support column (7). One end of the gas inlet pipe (602) is located inside the gas separator (601), and the other end of the gas inlet pipe (602) is located inside the processing tank (101). The exhaust pipe (603) is located at the top of the gas separator (601), and the other end of the exhaust pipe (603) is connected to a high-point vent pipe to discharge to a safe area or directly connected to a combustion catalytic furnace. One end of the return pipe (604) is located below the inside of the processing tank (101), and the other end of the return pipe (604) is located at the top of the processing tank (101) and extends into the processing tank (101).

9. The integrated treatment device for drilling mud circulation purification and harmful gas isolation according to claim 8, characterized in that, The baffle (605) is located inside the gas separator (601), and there are several baffles (605). Each baffle (605) is inclined. The rotating blade (607) is located inside the gas separator (601). The rotating blade (607) is rotatably connected to the bottom of the gas separator (601). The inclined plate (606) is located at the bottom of the gas separator (601) and is inclined. The inclined direction of the inclined plate (606) is towards the return pipe (604).

Images