CN109488238B - Multifunctional integrated drilling fluid comprehensive treatment system and method for geological drilling - Google Patents
Multifunctional integrated drilling fluid comprehensive treatment system and method for geological drilling Download PDFInfo
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- CN109488238B CN109488238B CN201910046843.8A CN201910046843A CN109488238B CN 109488238 B CN109488238 B CN 109488238B CN 201910046843 A CN201910046843 A CN 201910046843A CN 109488238 B CN109488238 B CN 109488238B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/068—Arrangements for treating drilling fluids outside the borehole using chemical treatment
Abstract
The application relates to the technical field of geological drilling engineering drilling fluid treatment, and provides a multifunctional integrated drilling fluid comprehensive treatment system and method for geological drilling. The system integrates the solid-phase control of drilling fluid and the treatment process of waste drilling fluid into a whole, and one set of system has multiple functions; the process flow is simplified, the cost is saved, the occupied area is small, the energy consumption is low, and the modular skid-mounted structure is convenient to move; the method adopts the technical method of combining the two-stage mechanical purification of the variable frequency vibrating screen-centrifugal machine with the gel breaking-flocculation chemical treatment, can realize solid-phase purification of the drilling fluid, can also be used for waste slurry treatment, integrally improves the performance of the drilling fluid, ensures high-quality, safe, efficient and low-consumption construction of geological drilling, and meets the requirements of clean production of the drilling fluid without falling to the ground, timely and energy-saving and emission-reducing waste drilling fluid while drilling, and resource utilization.
Description
Technical Field
The application belongs to the technical field of geological drilling engineering drilling fluid treatment, and particularly relates to a multifunctional integrated drilling fluid comprehensive treatment system and method for geological drilling.
Background
In the geological drilling construction process, the solid phase content of the drilling fluid is effectively controlled, the performance of the drilling fluid is improved, and the method has great significance in preventing the inner wall of the rope coring drill rod from skinning, avoiding the hole accidents such as collapse, diameter shrinkage, drilling sticking and the like, improving the drilling efficiency, prolonging the service life of the drilling tool and the like. With the continuous progress of drilling technology, new methods, new processes and new tools such as a hole bottom power drilling tool, a hydraulic down-the-hole hammer and the like are continuously popularized and applied, and higher requirements on the performance of drilling fluid are provided.
Meanwhile, if the waste drilling fluid is discharged at will without treatment in the drilling implementation process, long-term precipitation can cause great harm to natural environments such as nearby vegetation, soil, groundwater and the like and living environments of human beings; meanwhile, the available drilling fluid in the waste liquid is not recycled, so that the waste of the drilling fluid is caused.
At present, the drilling fluid comprehensive treatment system in the prior art mainly focuses on the technology of drilling fluid recovery and treatment and the technology of recycling the drilling fluid, so that other corresponding components are required to be added in the production process to realize recycling. During geological drilling, timely conveying and timely treatment of drilling fluid have direct influence on the oil and gas exploitation effect, and the conveying efficiency and quality of the drilling fluid are particularly emphasized in the geological drilling process. Often, in order to achieve higher efficiency and better quality, the required treatment equipment, such as shakers, etc., is often provided in an excessive number, resulting in a significant increase in costs.
In recent years, the geological drilling industry increasingly pays attention to the influence of drilling fluid solid-phase control technology on drilling fluid performance and drilling efficiency and cost, and the traditional method for naturally settling drilling fluid by adopting a sand setting tank is changed; meanwhile, the national requirements for ecological civilization construction are green investigation and green drilling. The existing drilling fluid solid control system and waste drilling fluid treatment system for petroleum drilling are two independent systems, and each system and matched equipment have the characteristics of high cost, large occupied area, high energy consumption, complex treatment process flow, large quality, difficult relocation and the like, and are not suitable for geological drilling engineering.
Disclosure of Invention
The application mainly solves the defects existing in the prior art, and provides a multifunctional integrated drilling fluid comprehensive treatment system suitable for geological drilling, so that the waste drilling fluid is timely, reduced and recycled while drilling, and the requirements of clean production without falling to the ground and ecological civilization construction on green drilling, energy conservation and emission reduction are met.
The multifunctional integrated drilling fluid comprehensive treatment system for geological drilling is characterized by comprising a primary purification module, a solid phase separation module and a drilling fluid configuration module, wherein the primary purification module, the solid phase separation module and the drilling fluid configuration module are sequentially arranged side by side and are of a modularized skid-mounted structure.
Preferably, the primary purification module comprises a sand setting tank and a collecting tank, wherein the sand setting tank comprises a chemical treatment bin, a sand setting bin, a gel breaking flocculation tank, a horizontal stirrer, a vertical stirrer, a variable frequency vibrating screen and a waste slurry sand pump; the device comprises a chemical treatment bin, a vertical stirrer, a variable frequency vibrating screen, a waste slurry sand pump, a slurry inlet distribution port, a collection tank, a butterfly valve and a slurry inlet distribution port, wherein the gel breaking flocculation tank is arranged above the chemical treatment bin, the horizontal stirrer is arranged above the chemical treatment bin, the vertical stirrer is arranged above the gel breaking flocculation tank, the variable frequency vibrating screen is arranged above the sand setting bin, the waste slurry sand pump is arranged on one side of the sand setting bin, an outlet of the waste slurry sand pump is communicated with the slurry inlet distribution port of the variable frequency vibrating screen, the collection tank is arranged right below a solid phase outlet of the variable frequency vibrating screen, and the butterfly valve is arranged in front of the slurry inlet distribution port tee joint of the variable frequency vibrating screen.
Preferably, the solid phase separation module comprises a circulation tank and a collecting tank, wherein the circulation tank comprises a circulation bin, a solid-liquid separation bin, a horizontal stirrer, a variable frequency centrifuge, a liquid supply pump and a circulation butterfly valve; the circulating bin is arranged above the solid-liquid separation bin, the horizontal stirrer is arranged above the circulating bin, the variable frequency centrifugal machine is arranged above the circulating bin, the liquid supply pump is arranged above the solid-liquid separation bin, the circulating butterfly valve is arranged below the tank body of the circulating bin, the inlet of the liquid supply pump is arranged in the solid-liquid separation bin, the outlet of the liquid supply pump is communicated with the inlet of the variable frequency centrifugal machine, the outlet of the variable frequency centrifugal machine is arranged in the circulating bin, and the collecting tank is arranged right below the solid-phase outlet of the variable frequency centrifugal machine.
Preferably, the drilling fluid configuration module comprises a pulping tank and a drilling fluid conveying pipeline, wherein the pulping tank comprises a weighting bin, a storage bin, a slurry sand pump, a jet flow slurry mixer, a dosing tank, a vertical stirrer, a horizontal stirrer and a circulating butterfly valve; the slurry mixing sand pump is arranged on one side of the weighting bin, the jet flow slurry mixer is arranged above the weighting bin, the chemical adding tank is arranged above the storage bin, the vertical stirrer is arranged above the chemical adding tank, the horizontal stirrer is arranged above the weighting bin and the storage bin, the circulating butterfly valve is arranged below the tank body of the storage bin, the outlet of the slurry mixing sand pump is communicated with the inlet of the jet flow slurry mixer, the outlet of the jet flow slurry mixer is arranged in the weighting bin, and the outlet of the chemical adding tank is arranged in the storage bin; the holding tank is provided with a drilling fluid outlet which is connected to a drilling fluid delivery line for delivering the prepared drilling fluid into the hole formed by geological drilling.
Preferably, the tank tops and the tank bottoms of the pulping tank, the circulating tank and the sand setting tank are communicated by the inter-tank union and the inter-tank butterfly valve; overflow transition slots consisting of the inter-tank union and the inter-tank butterfly valve are formed between the weighting bin and the storage bin, and between the chemical treatment bin and the sand setting bin, so that drilling fluid can flow conveniently; drilling fluid in the storage bin and drilling fluid in the circulation bin can circulate in the return holes through the circulation butterfly valve.
Preferably, the application also comprises a method for processing drilling fluid by using the multifunctional integrated drilling fluid comprehensive processing system for geological drilling, which is characterized by comprising the following four processing modes:
(1) Drilling fluid purification cycle mode: starting a primary purification module and a solid phase separation module to perform primary purification treatment and secondary purification treatment on drilling fluid returned from an orifice;
(2) Drilling fluid weighting configuration mode: starting a solid phase separation module and a drilling fluid configuration module to configure and weight the drilling fluid;
(3) Drilling fluid dispensing mode: starting a drilling fluid preparation module, and carrying out dosing treatment on the drilling fluid stored in the storage bin so as to prepare the required drilling fluid;
(4) Waste drilling fluid treatment mode: the waste drilling fluid is input into a collecting tank for recycling after being treated by chemical and mechanical solid-liquid treatment of a primary purification module and a solid-phase separation module through a waste slurry sand pump.
Preferably, the drilling fluid purification cycle mode refers to: the drilling fluid returned from the orifice is conveyed to a variable frequency vibrating screen through a slurry return pipeline, the drilling fluid after primary purification treatment of the variable frequency vibrating screen enters a sand setting bin for sand setting, and the treated solid phase enters a collecting tank below the variable frequency vibrating screen; drilling fluid in the sand setting bin flows into the chemical treatment bin through the overflow aqueduct port, and the drilling fluid after natural sedimentation in the chemical treatment bin enters the solid-liquid separation bin through the inter-tank mud aqueduct; the drilling fluid sucked into the solid-liquid separation bin by the liquid supply pump is conveyed to the variable frequency centrifuge, the drilling fluid subjected to secondary purification treatment by the variable frequency centrifuge enters the circulating bin, and the treated solid phase enters the collecting tank below the variable frequency centrifuge; drilling fluid in the circulation bin enters the storage bin through the inter-tank slurry aqueduct, and the slurry pump sucks the drilling fluid into the circulation bin or the drilling fluid return hole in the storage bin for recycling, so that the drilling fluid purification circulation is completed.
Preferably, the drilling fluid weighting configuration mode means that the drilling fluid is sucked into a weighting bin through a slurry sand pump and is weighted and mixed through a jet slurry mixer, and then the weighted drilling fluid is conveyed to the weighting bin; drilling fluid in the weighting bin flows into the reserve bin from the overflow aqueduct port to finish weighting and feeding of the drilling fluid.
Preferably, the drilling fluid dispensing mode refers to: the mixed medicines in the medicine adding tank are sent into the storage bin through a conveying pipeline, and a vertical stirrer on the tank surface of the medicine adding tank continuously works to prevent the medicines from precipitating; when the drilling fluid of the whole system needs to be added with medicines, a discharge valve below the medicine adding tank is opened, and medicines in the medicine adding tank can be added into the storage bin to finish the medicine dispensing process of the drilling fluid.
Preferably, the waste drilling fluid treatment mode refers to: waste drilling fluid enters a variable frequency vibrating screen through a waste slurry sand pump, drilling fluid subjected to variable frequency vibration treatment enters a sand setting bin, and a treated solid phase enters a collecting tank below the variable frequency vibrating screen; after repeated purification treatment, drilling fluid in the sand setting bin flows into a chemical treatment bin through an overflow aqueduct, a gel breaker prepared by a gel breaking flocculation tank, a PH regulator and a flocculating agent flow into the chemical treatment bin through pipelines, solid phases of waste drilling fluid are subjected to gel breaking flocculation to form larger particles, the particles are fully mixed through stirring to destroy a colloid system, the solid phases enter a solid-liquid separation bin through an inter-tank slurry aqueduct, the drilling fluid sucked into the solid-liquid separation bin by a liquid supply pump is conveyed to a variable frequency centrifuge, the drilling fluid subjected to secondary purification treatment by the variable frequency centrifuge enters a circulation bin, and the treated solid phases enter a collecting tank below the variable frequency centrifuge.
The geological drilling multifunctional integrated drilling fluid comprehensive treatment system can execute various processing modes; the process flow is simple, the cost is saved, the occupied area is small, the energy consumption is low, and the modularized skid-mounted structure is realized; the drilling fluid solid-phase control process adopts secondary purifying equipment, improves the performance of the drilling fluid, and ensures high-quality, safe, high-efficiency and low-consumption construction of geological drilling; the waste drilling fluid treatment process adopts a chemical-mechanical solid-liquid separation method, the treated solid phase is loose, and is concentrated after recovery, and the liquid phase achieves the purpose of configuring the drilling fluid for recycling, so that the waste drilling fluid is timely, reduced and recycled while drilling, and the requirements of clean production of the drilling fluid without falling to the ground and ecological civilization construction on green drilling, energy conservation and emission reduction are met.
Drawings
The application will be further described with reference to the drawings and examples.
FIG. 1 is a schematic diagram of a multifunctional integrated drilling fluid treatment system for geological drilling;
the arrow direction in the figure is the flowing direction of the drilling fluid in different working modes in the system.
FIG. 2 is a schematic diagram of the processing system modules cooperating to form processing modes according to the present application.
It should be noted that the drawings are not necessarily to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.
Detailed Description
The technical scheme of the application is further described below with reference to the accompanying drawings.
As shown in fig. 1, the multifunctional integrated drilling fluid comprehensive treatment system for geological drilling described by the application comprises: the device comprises a primary purification module, a solid phase separation module and a drilling fluid configuration module, wherein the primary purification module, the solid phase separation module and the drilling fluid configuration module are sequentially arranged side by side and are of a modularized skid-mounted structure. And the different modules work cooperatively under different working modes.
As can be seen from fig. 1, the drilling fluid configuration module includes a pulping tank and a drilling fluid conveying pipeline, the pulping tank 1 is provided with a sub-tank, namely, a weighting tank 19 and a storage tank 20, the slurry-distributing sand pump 4 is arranged on one side of the weighting tank 19, the jet-flow slurry mixer 5 is arranged above the weighting tank 19, the chemical adding tank 7 is arranged above the storage tank 20, the vertical stirrer 8 is arranged above the chemical adding tank 7, the horizontal stirrer 6 is arranged above the weighting tank 19 and the storage tank 20, the circulation butterfly valve 18 is arranged below the tank body of the storage tank 20, the outlet of the slurry-distributing sand pump 4 is communicated with the inlet of the jet-flow slurry mixer 5, the outlet of the jet-flow slurry mixer 5 is arranged in the weighting tank 19, and the outlet of the chemical adding tank 7 is arranged in the storage tank 20.
The solid phase separation module comprises a recycle tank 2 and a collection tank 14. The circulation tank 2 is provided with a separation bin, namely a circulation bin 21 and a solid-liquid separation bin 22, the horizontal stirrer 6 is arranged above the circulation bin 21 and the solid-liquid separation bin 22, the variable frequency centrifugal machine 9 is arranged above the circulation bin 21, the liquid supply pump 10 is arranged above the solid-liquid separation bin 22, the circulation butterfly valve 18 is arranged below the tank body of the circulation bin 21, the inlet of the liquid supply pump 10 is arranged in the solid-liquid separation bin 22, the outlet of the liquid supply pump 10 is communicated with the inlet of the variable frequency centrifugal machine 9, the outlet of the variable frequency centrifugal machine 9 is arranged in the circulation bin 21, and the collecting tank 14 is arranged right below the solid-phase outlet of the variable frequency centrifugal machine 9.
The primary purification module comprises a sand setting tank 3 and a collecting tank 14. The setting tank 3 is provided with a separating bin, namely a chemical treatment bin 23 and a setting bin 24, the gel breaking flocculation tank 11 is arranged above the chemical treatment bin 23, the horizontal stirrer 6 is arranged above the chemical treatment bin 23, the vertical stirrer 8 is arranged above the gel breaking flocculation tank 11, the variable frequency vibrating screen 12 is arranged above the setting bin 24, the waste slurry sand pump 13 is arranged on one side of the setting bin 24, an outlet of the waste slurry sand pump 13 is communicated with a slurry inlet distribution port of the variable frequency vibrating screen 12, the collecting tank 14 is arranged right below a solid phase outlet of the variable frequency vibrating screen 12, and the return butterfly valve 17 is arranged in front of a slurry inlet distribution pipe orifice tee joint of the variable frequency vibrating screen 12.
The pulping tank 1, the circulating tank 2 and the sand setting tank 3 are sequentially arranged in parallel, and the tank top and the tank bottom are communicated by the inter-tank union 15 and the inter-tank butterfly valve 16.
The drilling fluid configuration module comprises a pulping tank and a drilling fluid conveying pipeline, the pulping tank 1 is provided with a sub-bin, namely a weighting bin 19 and a storage bin 20, a slurry-mixing sand pump 4 is arranged on one side of the weighting bin 19, a jet flow slurry mixer 5 is arranged above the weighting bin 19, a dosing tank 7 is arranged above the storage bin 20, a vertical stirrer 8 is arranged above the dosing tank 7, horizontal stirrers 6 are arranged above the weighting bin 19 and the storage bin 20, a circulation butterfly valve 18 is arranged below a tank body of the storage bin 20, an outlet of the slurry-mixing sand pump 4 is communicated with an inlet of the jet flow slurry mixer 5, an outlet of the jet flow slurry mixer 5 is arranged in the weighting bin 19, and an outlet of the dosing tank 7 is arranged in the storage bin 20.
The treatment system provided by the application has various working modes, can realize the integrated layout of drilling fluid solid-phase control and waste drilling fluid treatment process, and has the advantages of simple process flow, small occupied area and low energy consumption; the drilling fluid solid phase control process flow comprises the following steps: the drilling fluid returned from the wellhead passes through the variable frequency vibrating screen 12 and the variable frequency centrifugal machine 9 secondary purifying equipment, and solid-phase control means such as weighting and dosing configuration of the drilling fluid are adopted, so that the treated drilling fluid can be recycled; the waste drilling fluid treatment process comprises the following steps: the abandoned drilling fluid is subjected to chemical-mechanical solid-liquid separation by the variable frequency vibrating screen 12, the chemical treatment unit consisting of the gel breaking flocculation tank 11 and the chemical treatment bin 23 and the variable frequency centrifugal machine 9, the treated solid phase is loose, and is concentrated after recovery, and the treated liquid phase is recycled by configuring the drilling fluid, so that clean production of the drilling fluid without falling to the ground, and timely, reduced and resource utilization of the abandoned drilling fluid while drilling can be realized.
The pulping tank 1, the circulating tank 2 and the sand setting tank 3 are of modularized skid-mounted structures, so that the grouting tank is convenient to move and suitable for geological drilling fluidity operation.
Overflow transition slots consisting of the inter-tank union (15) and the inter-tank butterfly valve (16) are arranged between the weighting bin 19 and the storage bin 20 and between the chemical treatment bin 23 and the sand setting bin 24, so that drilling fluid can flow conveniently; drilling fluid in both the reserve bin 20 and the circulation bin 21 can be circulated back into the hole through the circulation butterfly valve 18.
The sand setting tank 3 is of a conical structure, so that drilling fluid sand setting is facilitated.
The variable frequency vibrating screen 12 is matched with an independent variable frequency control cabinet, and can control the solid-liquid separation effect according to the performance of drilling fluid and the on-site drilling working condition, preferably the rotating speed of a variable frequency excitation motor, the dip angle and the mesh number of a screen; the screen mesh of the variable frequency vibrating screen 12 adopts a multi-layer screen mesh structure with a selected API standard; according to stratum characteristics and different working conditions, a double-layer screen structure is generally selected, the upper layer 150 meshes/the lower layer 20 meshes are preferably used for solid phase control of drilling fluid, and the upper layer 200 meshes/the lower layer 20 meshes are preferably used for treatment of waste drilling fluid.
The gel breaking flocculation tank 11 and the chemical treatment bin 23 form a chemical treatment unit, and gel breaking agents, PH regulators and flocculating agents are preferably selected according to an on-site drilling fluid system, and larger particles are formed after solid phase gel breaking flocculation of waste drilling fluid, so that solid-liquid separation is facilitated.
The variable frequency centrifugal machine 12 is matched with an independent variable frequency control cabinet, and the solid-liquid separation effect is controlled according to the performance of drilling fluid and the on-site drilling working condition, preferably the differential rotation speed of the variable frequency centrifugal machine 12.
According to the geological drilling multifunctional integrated drilling fluid comprehensive treatment system, compared with the various treatment fluid comprehensive recovery systems in the prior art, the number of core components adopted is reduced, for example, the number of vibrating screens is greatly reduced compared with other drilling fluid integrated treatment and drilling fluid recovery treatment equipment in the prior art. This benefits from the multiple optimizations that the processing system of the present application optimizes the piping between the modules. In order to achieve various functional modules and achieve various modes, the application simplifies functional components in the system, and simultaneously improves the processing efficiency and ensures the stable quality of drilling fluid under the condition of larger processing capacity.
Compared with other drilling fluid integrated treatment and drilling fluid recovery treatment equipment in the prior art, the comprehensive treatment system can present flexible adaptability in geological drilling, starts the treatment of the drilling fluid according to the actual requirements in the drilling process, and can ensure higher production efficiency while greatly reducing the number of equipment matched with a secondary purification mode, recovery and dispensing mode.
As shown in fig. 2, when the embodiment of the present application is used, the following modes can be implemented:
(1) Drilling fluid purification cycle mode: starting a primary purification module and a solid phase separation module to perform primary purification treatment and secondary purification treatment on drilling fluid returned from an orifice; the specific purification process is as follows:
the drilling fluid returned from the orifice is conveyed to the variable frequency vibrating screen 12 through a slurry return pipeline, the drilling fluid after primary purification treatment of the variable frequency vibrating screen 12 enters a sand setting bin 24 for sand setting, and the treated solid phase enters a collecting tank (14) below the variable frequency vibrating screen 12; drilling fluid in the sand setting bin 24 flows into the chemical treatment bin 23 through an overflow aqueduct port, and the drilling fluid naturally settled in the chemical treatment bin 23 enters the solid-liquid separation bin 22 through an inter-tank mud aqueduct; the drilling fluid sucked into the solid-liquid separation bin 22 by the liquid supply pump 10 is conveyed to the variable frequency centrifuge 9, the drilling fluid subjected to secondary purification treatment by the variable frequency centrifuge 9 enters the circulating bin 21, and the treated solid phase enters the collecting tank 14 below the variable frequency centrifuge 9; the drilling fluid in the circulation bin 21 enters the storage bin 20 through a mud aqueduct between tanks, and a mud pump can be sucked into the circulation bin 21 or a drilling fluid return hole in the storage bin 20 for circulation use, so that the cleaning and circulating treatment of the drilling fluid without falling to the ground is completed;
(2) Drilling fluid weighting configuration mode: starting a solid phase separation module and a drilling fluid configuration module to configure and weight the drilling fluid; the specific weighting configuration process comprises the following steps:
the drilling fluid configuration and weighting system consists of a slurry sand pump 4, a jet flow slurry mixer 5 and a manifold. The slurry sand pump 4 is used for sucking the drilling fluid in the weighting bin 19, weighting and mixing the drilling fluid by the jet flow slurry mixer 5, and then conveying the weighted drilling fluid to the weighting bin 19. Drilling fluid in the weighting bin 19 can flow into the reserve bin 20 through the overflow aqueduct port, so that the processes of drilling fluid configuration, weighting, replenishment feeding and the like are completed;
(3) Drilling fluid dispensing mode: starting a drilling fluid preparation module, and carrying out dosing treatment on the drilling fluid stored in the storage bin so as to prepare the required drilling fluid; the specific dispensing process is as follows:
the medicine adding tank 7 is placed on the tank surface of the pulping tank 1, the mixed medicines in the medicine adding tank 7 are sent into the storage bin 20 through a conveying pipeline, and the vertical stirrer 8 is arranged on the tank surface of the medicine adding tank 7, so that the vertical stirrer 8 continuously works for preventing medicines from precipitating. When the whole system drilling fluid needs to be added with medicines, a discharge valve below the medicine adding tank 7 is opened, and medicines in the medicine adding tank 7 can be added into the storage bin 20 to complete the drilling fluid medicine configuration process.
(4) Waste drilling fluid treatment mode: the waste drilling fluid is input into a collecting tank for recycling after being treated by chemical and mechanical solid-liquid treatment of a primary purification module and a solid-phase separation module through a waste slurry sand pump. The specific waste treatment process comprises the following steps:
waste drilling fluid enters a variable frequency vibrating screen 12 through a waste slurry sand pump 13, the rotating speed of a variable frequency excitation motor, the inclination angle of a screen mesh and the replacement of the fine mesh screen mesh are adjusted according to the performance of the drilling fluid and the on-site drilling working condition, the excitation strength is improved, the solid-liquid separation effect is improved, the drilling fluid treated by the variable frequency vibrating screen 12 enters a sand setting bin 24, and the treated solid phase enters a collecting tank 14 below the variable frequency vibrating screen 12; after repeated purification treatment, drilling fluid in a sand settling bin 24 flows into a chemical treatment bin 23 through an overflow aqueduct, a gel breaker prepared by a gel breaking flocculation tank 11, a pH regulator and a flocculating agent flow into the chemical treatment bin 2 through a pipeline, solid phases of waste drilling fluid are subjected to gel breaking flocculation to form larger particles, the larger particles are fully mixed through stirring to destroy a colloid system, the solid phases enter a solid-liquid separation bin 22 through an inter-tank slurry aqueduct, the drilling fluid sucked into the solid-liquid separation bin 22 by a liquid supply pump 10 is conveyed to a variable frequency centrifuge 9, the drilling fluid subjected to secondary purification treatment by the variable frequency centrifuge 9 enters a circulation bin 21, and the treated solid phases enter a collecting tank 14 below the variable frequency centrifuge 9; through the solid phase loosening and the concentrated treatment after the recovery after the chemical-mechanical solid-liquid treatment, the liquid phase achieves the purpose of preparing the drilling fluid for recycling, thereby realizing the clean production of the drilling fluid, and the waste drilling fluid is timely and reduced while drilling and is recycled.
The above is a preferred embodiment of the present application, and all changes made according to the technical solution of the present application belong to the protection scope of the present application when the generated functional effects do not exceed the scope of the technical solution of the present application. It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
1. The multifunctional integrated drilling fluid comprehensive treatment system for geological drilling is characterized by comprising a primary purification module, a solid phase separation module and a drilling fluid configuration module, wherein the primary purification module, the solid phase separation module and the drilling fluid configuration module are sequentially arranged side by side and are of a modularized skid-mounted structure;
the primary purification module comprises a sand setting tank and a collecting tank, wherein the sand setting tank is of a conical structure, and comprises a chemical treatment bin, a sand setting bin, a gel breaking flocculation tank, a horizontal stirrer, a vertical stirrer, a variable frequency vibrating screen and a waste slurry sand pump; the device comprises a chemical treatment bin, a vertical stirrer, a variable frequency vibrating screen, a waste slurry sand pump, a slurry inlet distribution port, a collection tank, a discharge butterfly valve, a slurry inlet distribution port and a slurry inlet distribution port, wherein the gel breaking flocculation tank is arranged above the chemical treatment bin, the horizontal stirrer is arranged above the chemical treatment bin, the vertical stirrer is arranged above the gel breaking flocculation tank, the variable frequency vibrating screen is arranged above the sand setting bin, the waste slurry sand pump is arranged on one side of the sand setting bin, the outlet of the waste slurry sand pump is communicated with the slurry inlet distribution port of the variable frequency vibrating screen, the collection tank is arranged right below the solid phase outlet of the variable frequency vibrating screen, and the discharge butterfly valve is arranged in front of the slurry inlet distribution port tee joint of the variable frequency vibrating screen;
the solid phase separation module comprises a circulation tank and a collecting tank, wherein the circulation tank comprises a circulation bin, a solid-liquid separation bin, a horizontal stirrer, a variable frequency centrifugal machine, a liquid supply pump and a circulation butterfly valve; the horizontal stirrer is arranged above the circulating bin and the solid-liquid separation bin, the variable frequency centrifugal machine is arranged above the circulating bin, the liquid supply pump is arranged above the solid-liquid separation bin, the circulating butterfly valve is arranged below the tank body of the circulating bin, the inlet of the liquid supply pump is arranged in the solid-liquid separation bin, the outlet of the liquid supply pump is communicated with the inlet of the variable frequency centrifugal machine, the outlet of the variable frequency centrifugal machine is arranged in the circulating bin, and the collecting tank is arranged right below the solid-phase outlet of the variable frequency centrifugal machine;
the drilling fluid preparation module comprises a pulping tank and a drilling fluid conveying pipeline, wherein the pulping tank comprises a weighting bin, a storage bin, a pulping sand pump, a jet flow slurry mixer, a dosing tank, a vertical stirrer, a horizontal stirrer and a circulating butterfly valve; the slurry mixing sand pump is arranged on one side of the weighting bin, the jet flow slurry mixer is arranged above the weighting bin, the chemical adding tank is arranged above the storage bin, the vertical stirrer is arranged above the chemical adding tank, the horizontal stirrer is arranged above the weighting bin and the storage bin, the circulating butterfly valve is arranged below the tank body of the storage bin, the outlet of the slurry mixing sand pump is communicated with the inlet of the jet flow slurry mixer, the outlet of the jet flow slurry mixer is arranged in the weighting bin, and the outlet of the chemical adding tank is arranged in the storage bin; the holding tank is provided with a drilling fluid outlet which is connected to a drilling fluid delivery line for delivering the prepared drilling fluid into the hole formed by geological drilling.
2. The geological drilling multifunctional integrated drilling fluid comprehensive treatment system according to claim 1, wherein: the pulping tank, the circulating tank and the top and bottom of the sand setting tank are communicated by the inter-tank union and the inter-tank butterfly valve; overflow transition slots consisting of the inter-tank union and the inter-tank butterfly valve are formed between the weighting bin and the storage bin, and between the chemical treatment bin and the sand setting bin, so that drilling fluid can flow conveniently; drilling fluid in the storage bin and drilling fluid in the circulation bin can circulate in the return holes through the circulation butterfly valve.
3. A method of treating drilling fluid using the geological drilling multifunctional integrated drilling fluid comprehensive treatment system of claim 1 or 2, characterized in that the treatment method comprises the following four treatment modes:
(1) Drilling fluid purification cycle mode: starting a primary purification module and a solid phase separation module to perform primary purification treatment and secondary purification treatment on drilling fluid returned from an orifice;
(2) Drilling fluid weighting configuration mode: starting a solid phase separation module and a drilling fluid configuration module to configure and weight the drilling fluid;
(3) Drilling fluid dispensing mode: starting a drilling fluid preparation module, and carrying out dosing treatment on the drilling fluid stored in the storage bin so as to prepare the required drilling fluid;
(4) Waste drilling fluid treatment mode: the waste drilling fluid is input into a collecting tank for recycling after being treated by chemical and mechanical solid-liquid treatment of a primary purification module and a solid-phase separation module through a waste slurry sand pump.
4. A method of treating drilling fluid according to claim 3, wherein:
the drilling fluid purifying and circulating mode refers to: the drilling fluid returned from the orifice is conveyed to a variable frequency vibrating screen through a slurry return pipeline, the drilling fluid after primary purification treatment of the variable frequency vibrating screen enters a sand setting bin for sand setting, and the treated solid phase enters a collecting tank below the variable frequency vibrating screen; drilling fluid in the sand setting bin flows into the chemical treatment bin through the overflow aqueduct port, and the drilling fluid after natural sedimentation in the chemical treatment bin enters the solid-liquid separation bin through the inter-tank mud aqueduct; the drilling fluid sucked into the solid-liquid separation bin by the liquid supply pump is conveyed to the variable frequency centrifuge, the drilling fluid subjected to secondary purification treatment by the variable frequency centrifuge enters the circulating bin, and the treated solid phase enters the collecting tank below the variable frequency centrifuge; drilling fluid in the circulation bin enters the storage bin through the inter-tank slurry aqueduct, and the slurry pump sucks the drilling fluid into the circulation bin or the drilling fluid return hole in the storage bin for recycling, so that the drilling fluid purification circulation is completed.
5. A method of treating drilling fluid according to claim 3, wherein:
the drilling fluid weighting configuration mode is that drilling fluid is sucked into a weighting bin through a slurry-mixing sand pump and is weighted and mixed through a jet slurry mixer, and the weighted drilling fluid is conveyed to the weighting bin; drilling fluid in the weighting bin flows into the reserve bin from the overflow aqueduct port to finish weighting and feeding of the drilling fluid.
6. A method of treating drilling fluid according to claim 3, wherein:
the drilling fluid dispensing mode refers to: the mixed medicines in the medicine adding tank are sent into the storage bin through a conveying pipeline, and a vertical stirrer on the tank surface of the medicine adding tank continuously works to prevent the medicines from precipitating; when the drilling fluid of the whole system needs to be added with medicines, a discharge valve below the medicine adding tank is opened, and medicines in the medicine adding tank can be added into the storage bin to finish the medicine dispensing process of the drilling fluid.
7. A method of treating drilling fluid according to claim 3, wherein:
the waste drilling fluid treatment mode is as follows: waste drilling fluid enters a variable frequency vibrating screen through a waste slurry sand pump, drilling fluid subjected to variable frequency vibration treatment enters a sand setting bin, and a treated solid phase enters a collecting tank below the variable frequency vibrating screen; after repeated purification treatment, drilling fluid in the sand setting bin flows into a chemical treatment bin through an overflow aqueduct, a gel breaker prepared by a gel breaking flocculation tank, a PH regulator and a flocculating agent flow into the chemical treatment bin through pipelines, solid phases of waste drilling fluid are subjected to gel breaking flocculation to form larger particles, the particles are fully mixed through stirring to destroy a colloid system, the solid phases enter a solid-liquid separation bin through an inter-tank slurry aqueduct, the drilling fluid sucked into the solid-liquid separation bin by a liquid supply pump is conveyed to a variable frequency centrifuge, the drilling fluid subjected to secondary purification treatment by the variable frequency centrifuge enters a circulation bin, and the treated solid phases enter a collecting tank below the variable frequency centrifuge.
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| CN110318697A (en) * | 2019-05-20 | 2019-10-11 | 国家电网有限公司 | A kind of packaged type pile foundation drilling mud processing unit |
| CN112983318B (en) * | 2019-12-17 | 2023-05-26 | 中国石油天然气股份有限公司 | Treatment device and treatment method for drilling waste |
| CN115126430A (en) * | 2022-08-04 | 2022-09-30 | 承德石油高等专科学校 | High-density drilling fluid treatment device |
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