CN112979321A - Method for utilizing drilling waste - Google Patents
Method for utilizing drilling waste Download PDFInfo
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- CN112979321A CN112979321A CN201911294724.0A CN201911294724A CN112979321A CN 112979321 A CN112979321 A CN 112979321A CN 201911294724 A CN201911294724 A CN 201911294724A CN 112979321 A CN112979321 A CN 112979321A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C—CHEMISTRY; METALLURGY
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/606—Drying
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention provides a method for utilizing drilling waste, which comprises the following steps: preparing a material mainly containing drilling waste into ceramsite; the drilling waste refers to water-based drilling waste, and comprises condensate of the water-based drilling waste or condensate of the drilling waste. The invention utilizes the characteristics that the main components of the drilling waste are clay and sandstone and are rich in organic matters at the same time to prepare the ceramsite with high porosity, low bulk density and certain compressive strength. The invention changes the well drilling solid waste which is difficult to dispose in the petroleum well drilling engineering into the high expansion type ceramsite which is widely applied in the industries of construction, gardening and chemical industry, realizes the harmless and resource treatment of the well drilling waste, and is an environment-friendly, economic and sustainable technology.
Description
Technical Field
The invention relates to the technical field of resource utilization of solid wastes, in particular to a utilization method of drilling wastes.
Background
In the oil drilling process, a large amount of water-based drilling mud can be prepared for the requirements of balancing the formation pressure, keeping the well wall stable, cooling the drill bit and suspending and carrying drill cuttings. The drilling mud returns out of the wellhead together with the drill cuttings, a considerable part of the drilling mud adheres to the drill cuttings, and even though the drilling mud is treated by the solid control system, a part of the drilling mud and the drill cuttings cannot be separated and discarded. The drilling cuttings and waste mud contain a large amount of drilling aids, are mostly temperature-resistant and salt-resistant organic matters and inorganic matters, have high stability, high chroma and serious pollution, and are main pollutants in the petroleum drilling process. The common treatment method for the drilling cuttings and the waste mud is landfill after solidification, because the country implements strict soil pollution environment protection policy, the site of a well site is strictly limited, and the site selection of a cured substance landfill site is more and more difficult; and then the solidification and landfill of the drilling waste is not a thorough harmless treatment technology, and the hidden danger of the penetration and diffusion of pollutants in a landfill site exists. Therefore, it is urgent to search the resource utilization technology of drilling solid waste.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for utilizing drilling waste, wherein the drilling waste is prepared into ceramsite, which can effectively treat the drilling waste, and realize harmless and resource utilization of the drilling waste.
The invention provides a method for utilizing drilling waste, which comprises the following steps:
preparing a material mainly containing drilling waste into ceramsite;
the drilling waste refers to water-based drilling waste and comprises a cured product of the drilling waste or a cured product of the drilling waste;
the condensate of the drilling waste is a product obtained by solidifying a mixture of drill cuttings and waste mud;
the concretion of the drilling waste is a product of waste drilling waste mud after destabilization and dehydration treatment.
In the present invention, the water content of the cured product of the drilling waste is preferably 25 to 40%, and more preferably 30 to 35%.
In the present invention, the method for producing a cured product of drilling waste preferably includes:
mixing the mixture of the drill cuttings and the waste slurry, the inorganic destabilizing agent and the composite portland cement, and obtaining a cured substance of the drilling waste after the mixture is cured.
In the present invention, the method of mixing is preferably:
adding an inorganic destabilizing agent into a mixture of the drill cuttings and the waste mud, stirring, adding the composite Portland cement into a stirred product, continuously stirring uniformly, and waiting to solidify to obtain a solidified substance of the drilling waste.
In the invention, the stirring speed is preferably 100-200 r/min, more preferably 120-180 r/min, and most preferably 140-160 r/min; the stirring time is preferably 15-20 min; the time for continuing stirring is preferably 8-12 minutes, and more preferably 10 min.
In the present invention, the mixing is preferably carried out in a curing reactor; and preferably, after the mixing is finished, the obtained mixture is cured to obtain a cured product of the drilling waste.
In the present invention, the waiting time is preferably one week.
In the present invention, the inorganic destabilizing agent is preferably one selected from quick lime, calcium salt and magnesium salt. In the present invention, the calcium salt is preferably selected from calcium chloride and hydrates thereof; the magnesium salt is preferably selected from magnesium chloride and hydrates thereof.
In the present invention, the mixture of drill cuttings and waste mud is the drill cuttings mixed with mud produced during the drilling process.
In the invention, the mass ratio of the mixture of the inorganic destabilizing agent, the composite Portland cement, the drill cuttings and the waste slurry is preferably (3-5) to (5-8): (89-92), more preferably (3.5-4.5): (6-7) (90-91), most preferably 4: 6.5:90.5.
In the present invention, the method for utilizing drilling waste preferably specifically comprises:
mixing the pigment, calcium magnesium powder, coal gangue powder and the condensate of the drilling waste to obtain a mixture;
granulating the mixture to obtain raw material balls;
and roasting the raw material balls to obtain the ceramsite.
In the present invention, the colorant is preferably one selected from the group consisting of iron ore concentrate powder, iron oxide powder, manganese ore concentrate powder, and diamond powder.
In the present invention, the calcium magnesium powder preferably includes calcium carbonate and magnesium carbonate; the mass ratio of the calcium carbonate to the magnesium carbonate is preferably (2-3): 1, more preferably (2.2 to 2.8): 1, most preferably (2.4-2.6): 1.
in the invention, the mass ratio of the pigment, the calcium magnesium powder, the coal gangue powder and the condensate of the drilling waste is preferably (1-3): (3-5): (2-3): (89-93), more preferably (1.5-2.5): (3.5-4.5): (2.2-2.8): (90-92), most preferably 2: 4: (2.4-2.6): 91.
in the present invention, the solidified drilling waste is preferably crushed and ground to form powder; the granularity of the powder is preferably larger than or equal to 50 meshes, and more preferably 50-80 meshes.
In the invention, the granularity of the mixture is preferably larger than or equal to 50 meshes, and more preferably 50-80 meshes.
In the present invention, the granulation is preferably performed in a twin-roll granulator, and the granulation is preferably:
compacting, extruding and cutting the mixture in a double-roll granulator to prepare coarse ball billets;
and conveying the coarse ball blank to a ball forming disc to roll to prepare a raw material ball.
In the invention, the aperture of the roller of the pair-roller granulator is preferably 6-12 mm, and more preferably 8 mm; the diameter of the balling disc is preferably 2000-2200 mm, and more preferably 2100 mm; the rotation speed in the granulation process is preferably 15-20 r/min, and more preferably 17-18 r/min.
In the present invention, the shape of the raw meal ball is preferably circular or elliptical; the diameter of the raw material ball is preferably 8-12 mm, and more preferably 9 mm.
In the present invention, the calcination is preferably performed in a rotary kiln. In the invention, the installation gradient of the rotary kiln is preferably 2-4%, and more preferably 3%.
In the invention, the roasting temperature is preferably 1150-1190 ℃, more preferably 1160-1180 ℃ and most preferably 1170 ℃; the roasting time is preferably 5-10 min, more preferably 6-9 min, and most preferably 7-8 min.
In the invention, the discharging temperature of the roasted product is preferably 900-1000 ℃, more preferably 920-980 ℃, and most preferably 940-960 ℃.
In the present invention, the calcination preferably further comprises:
and drying and preheating the raw material balls.
In the invention, the drying temperature is preferably 120-180 ℃, more preferably 130-170 ℃, and most preferably 140-160 ℃; the drying time is preferably 20-40 min, more preferably 25-35 min, and most preferably 30 min. In the invention, the heat for drying is preferably the waste heat generated in the process of cooling the discharged ceramsite.
In the invention, the preheating temperature is preferably 600-650 ℃, more preferably 610-640 ℃, and most preferably 620-630 ℃; the preheating time is preferably 15-20 min, more preferably 16-19 min, and most preferably 17-18 min.
In the present invention, it is preferable that the firing further includes:
and cooling the roasted product to obtain the ceramsite.
In the invention, the cooling time is preferably 3-5 min, and more preferably 4 min; the discharging temperature of the ceramsite is preferably lower than 80 ℃.
In the invention, after the preparation of the ceramsite, the method preferably further comprises the following steps:
and a mode of combining a bag type dust collector and a countercurrent spray type absorption tower is adopted for removing dust and harmful gas.
In the invention, the absorption liquid used for the tail gas countercurrent spray absorption tower is preferably an alkaline solution with the mass concentration of 10%.
In the invention, the initial water content of the consolidation of the drilling waste is preferably 60-70%, more preferably 62-68%, and most preferably 64-66%; the water content after aging is preferably 30-40%, more preferably 32-38%, and most preferably 34-36%.
In the present invention, the method for preparing the solidification product of drilling waste preferably includes:
mixing the waste mud, the inorganic polymer destabilizing agent, the regulator and the polyacrylamide to obtain the concretion of the drilling waste.
The present invention is not particularly limited to the water-based waste mud, and may be any water-based waste mud produced during a drilling process, which is well known to those skilled in the art.
In the invention, the inorganic polymer destabilizing agent is selected from one of polymeric ferric chloride, polymeric ferric sulfate and polymeric aluminum chloride.
In the present invention, the conditioning agent is one selected from the group consisting of caustic soda and slaked lime.
In the invention, the mass ratio of the inorganic polymer destabilizing agent to the regulator to the polyacrylamide to the waste slurry is preferably (3-5): (0.5-2): (0.01-0.05): (92-96), more preferably (3.5-4.5): (1-1.5): (0.02-0.04): (93-95), most preferably 4: (1.2-1.3): 94.
in the present invention, the consolidation of drilling waste is preferably prepared in a coagulation reaction tank, and the preparation method of the consolidation of drilling waste more preferably includes:
under the condition of stirring, adding an inorganic polymer destabilizing agent into the waste slurry, then adding a regulator solution for regulating the pH value, and finally adding polyacrylamide as a flocculating agent to obtain a mixture;
carrying out filter pressing on the mixture to obtain a filter cake;
and aging the filter cake to obtain a consolidation of the drilling waste.
In the invention, the stirring speed is preferably 100-200 rpm, more preferably 120-180 rpm, and most preferably 140-160 rpm.
In the invention, the inorganic polymer destabilizing agent is preferably an inorganic polymer destabilizing agent solution, more preferably an inorganic polymer destabilizing agent water solution, and the mass concentration of the inorganic polymer destabilizing agent solution is preferably 15-25%, more preferably 18-22%, and most preferably 20%; the stirring time of the inorganic polymer destabilizing agent is preferably 10-15 min, more preferably 11-14 min, and most preferably 12-13 min.
In the present invention, the conditioning agent is preferably a conditioning agent solution; the pH value adjusting range is preferably 6-9, more preferably 6.5-8.5, and most preferably 7.0-8.0.
In the invention, the polyacrylamide is preferably a polyacrylamide solution, more preferably a polyacrylamide aqueous solution, and the mass concentration of the polyacrylamide solution is preferably 0.05-0.15%, more preferably 0.08-0.12%, and most preferably 0.1%. In the invention, the stirring time of the polyacrylamide is preferably 2-4 min, more preferably 2.5-3.5 min, and most preferably 3 min.
In the invention, the filter pressing is preferably carried out in a plate-and-frame filter press, and the pressure of a liquid inlet pump in the filter pressing process is preferably 0.6-0.8 MPa.
The plate frame jacking pressure in the filter pressing process is preferably 16-20 MPa, and more preferably 18 MPa; the pressure maintaining time of the plate frame jacking pressure is preferably 2-3 hours, and more preferably 2.5 hours; and releasing pressure after the pressure maintaining is finished, opening the plate frame, and unloading the filter cake.
In the invention, the aging dehydration refers to a process of naturally drying and removing a part of water from the filter-pressed mud cake.
In the present invention, the method for utilizing drilling waste preferably specifically comprises:
mixing aggregate, fly ash, pigment and consolidation of drilling waste to obtain a mixture;
granulating the mixture to obtain raw material balls;
and roasting the raw material balls to obtain the ceramsite.
In the present invention, the aggregate is preferably one selected from the group consisting of quartz powder, bauxite, and shale.
In the present invention, the coloring material is preferably one selected from the group consisting of iron ore concentrate powder, iron oxide powder, manganese ore concentrate powder and diamond dust powder.
In the invention, the mass ratio of the aggregate, the fly ash, the pigment and the solidification product of the drilling waste is preferably (25-35): (3-5): (2-3): (60-70), more preferably (28-32): (3.5-4.5): (2.2-2.8): (62-68), most preferably 30: 4: (2.4-2.6): (64 to 66).
In the present invention, the mixing is preferably carried out in a double horizontal shaft stirrer. In the invention, the granularity of the mixture is preferably larger than or equal to 50 meshes, and more preferably 50-80 meshes.
In the present invention, the method for obtaining raw material balls by granulation is the same as the method for obtaining raw material balls by granulation in the above technical scheme, and is not described herein again.
In the present invention, the method for obtaining ceramsite by roasting is the same as the method for obtaining ceramsite by roasting in the above technical scheme, and is not described herein again.
The invention adopts the technologies of pretreatment, grinding, mixing, granulation and sintering to the drilling waste, and the drilling waste is made into the ceramsite with wide application in the industries of construction, gardening and chemical industry, thereby avoiding the hidden trouble of environmental protection caused by piling and burying the drilling solid waste, changing waste into valuable, expanding the source of raw materials for preparing the ceramsite and having good social benefit and economic benefit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other examples, which may be modified or appreciated by those of ordinary skill in the art based on the examples given herein, are intended to be within the scope of the present invention.
Example 1
Mixing and stirring a mixture of drill cuttings and waste slurry discharged by solid control equipment collected in a well site in a consolidation reactor according to the mass percent of 5 wt% of lime, 6 wt% of composite Portland cement and 89 wt% of drill cuttings and waste slurry to obtain a consolidation reaction product, and discharging the product for waiting for coagulation for one week to obtain a cured product of drilling waste.
Crushing and grinding the cured materials of the drilling wastes to enable the powder to pass through 50 meshes, and uniformly mixing 2 wt% of iron concentrate powder, 4 wt% of calcium magnesium powder, 4 wt% of coal gangue powder and 90 wt% of cured materials of the drilling wastes in a double horizontal shaft mixer to obtain ceramsite powder; wherein the calcium magnesium powder is a mixture of calcium carbonate and magnesium carbonate, and the mass ratio is 3: 1.
Conveying the ceramsite powder to a double-roller granulator, compacting, extruding and cutting to prepare a coarse ball blank, and conveying the coarse ball blank into a balling disc to roll to form raw material balls;
the raw material balls are processed by a rotary furnace with the installation gradient of 3 percent, and then are processed by the processes of drying, preheating, roasting, discharging and cooling in sequence to prepare finished product ceramsite; the drying temperature of the raw material balls is 160 ℃, the drying time is 20-40 min, and the used heat is the waste heat generated in the discharging ceramsite cooling process; the preheating temperature is 600-650 ℃, and the preheating time is 15-20 min; the temperature of the roasting section is 1165-1190 ℃, and the roasting time is 5-10 min; the ceramic aggregate is taken out of the kiln at the temperature of 900-1000 ℃ and the cooling time is 3-5 min. Directly cooling by air after discharging, wherein the discharging temperature of the ceramsite is lower than 80 ℃.
Example 2
Mixing and stirring a drill chip and waste slurry mixture discharged by a solid control device collected in a well site in a consolidation reactor according to the mass percentage of 4 wt% of calcium salt (calcium chloride and hydrate thereof), 8 wt% of composite portland cement and 88 wt% of drill chip and waste slurry to obtain a consolidation reaction product, and discharging out the product for waiting for a week to obtain a cured product of drilling waste.
Crushing and grinding the cured drilling waste to form powder with the particle size smaller than 50 meshes, and uniformly mixing 1 wt% of iron oxide powder, 3 wt% of calcium magnesium powder, 4 wt% of coal gangue powder and 92 wt% of cured drilling waste in a double horizontal shaft mixer to obtain ceramsite powder; wherein the calcium magnesium powder is a mixture of calcium carbonate and magnesium carbonate, and the mass ratio is 2: 1.
The ceramsite powder is conveyed to a double-roller granulator to be made into a coarse ball blank through the processes of compaction, extrusion and cutting, and then conveyed to a balling disc to roll into raw material balls.
The raw material balls are processed by a rotary furnace with the installation gradient of 3 percent, and then are processed by the processes of drying, preheating, roasting, discharging and cooling in sequence to prepare finished product ceramsite; the drying temperature of the raw material balls is 160 ℃, the drying time is 20-40 min, and the used heat is the waste heat generated in the discharging ceramsite cooling process; the preheating temperature is 600-650 ℃, and the preheating time is 15-20 min; the temperature of the roasting section is 1165-1180 ℃, and the roasting time is 5-10 min; the ceramic aggregate is taken out of the kiln at the temperature of 900-1000 ℃ and the cooling time is 3-5 min. Directly cooling by air after discharging, wherein the discharging temperature of the ceramsite is lower than 80 ℃.
Example 3
Mixing and stirring a drill chip and waste slurry mixture discharged by solid control equipment collected in a well site in a consolidation reactor according to the mass percent of 5 wt% of magnesium salt (magnesium chloride and hydrate thereof), 8 wt% of composite portland cement and 87 wt% of drill chip and waste slurry to obtain a consolidation reaction product, and discharging out the product for waiting for a week to obtain a cured product of drilling waste.
Crushing and grinding the cured drilling waste to form powder with the particle size smaller than 50 meshes, and uniformly mixing 1 wt% of manganese concentrate powder, 3 wt% of calcium magnesium powder, 4 wt% of coal gangue powder and 92 wt% of cured drilling waste in a double horizontal shaft mixer to obtain ceramic powder; wherein the calcium magnesium powder is a mixture of calcium carbonate and magnesium carbonate, and the mass ratio is 2: 1.
The ceramsite powder is conveyed to a double-roller granulator to be made into a coarse ball blank through the processes of compaction, extrusion and cutting, and then conveyed to a balling disc to roll into raw material balls.
The raw material balls are processed by a rotary furnace with the installation gradient of 3 percent, and then are processed by the processes of drying, preheating, roasting, discharging and cooling in sequence to prepare finished product ceramsite; the drying temperature of the raw material balls is 160 ℃, the drying time is 20-40 min, and the used heat is the waste heat generated in the discharging ceramsite cooling process; the preheating temperature is 600-650 ℃, and the preheating time is 15-20 min; the temperature of the roasting section is 1165-1180 ℃, and the roasting time is 5-10 min; the ceramic aggregate is taken out of the kiln at the temperature of 900-1000 ℃ and the cooling time is 3-5 min. Directly cooling by air after discharging, wherein the discharging temperature of the ceramsite is lower than 80 ℃.
Example 4
Waste mud collected from a well site is placed in a coagulation reaction tank, and the waste mud is prepared according to the mass percentage of 3 wt% of polyferric chloride, 0.95 wt% of caustic soda, 0.05 wt% of polyacrylamide and 96 wt% of waste mud; adding 20 mass percent of polymeric ferric chloride aqueous solution according to the formula amount at a stirring speed of 100-200 r/min, stirring for 10-15 min, adding an adjusting agent of caustic soda, adjusting the pH value to 7-8, finally adding 0.1 mass percent of flocculating agent of polyacrylamide aqueous solution according to the formula amount, and stirring for 3min to obtain a waste pulp mixture;
pumping the coagulated mixture into a plate-and-frame filter press, keeping the pressure of a liquid inlet pump at 0.7-0.8 MPa and the pressing pressure of a plate frame at 16-18 MPa, releasing pressure, opening the plate frame after about 2-3 hours, and unloading a filter cake; and stacking the filter cake for further aging and dewatering to obtain the consolidation of the drilling waste.
Crushing and grinding the concretion of the drilling waste, enabling the powder to pass through a 50-mesh sieve, and uniformly mixing the concretion of the drilling waste in a double-horizontal-shaft stirrer according to the mass percentage of 35 wt% of shale soil, 5 wt% of fly ash, 2 wt% of iron concentrate powder and 58 wt% of concretion of the drilling waste after stable breaking and dehydration to obtain a mixture.
The mixture is conveyed to a double-roller granulator to be made into coarse ball blanks through the processes of compaction, extrusion and cutting, and then the coarse ball blanks are conveyed to a balling disc to roll into raw material balls.
The raw material balls pass through a rotary furnace with the installation gradient of 3 percent, and are sequentially dried, preheated, roasted, discharged from the furnace and cooled to prepare finished ceramsite; the drying temperature of the raw material balls is 120-150 ℃, the drying time is 35-40 min, and the used heat is the waste heat generated in the discharging ceramsite cooling process; the preheating temperature is 600-650 ℃, and the preheating time is 15-20 min; the temperature of the roasting section is 1155-1175 ℃, and the roasting time is 5-10 min; the ceramic aggregate is taken out of the kiln at the temperature of 900-1000 ℃ and the cooling time is 3-5 min. Directly cooling by air after discharging, wherein the discharging temperature of the ceramsite is lower than 80 ℃.
Example 5
Waste mud collected from a well site is put into a coagulation reaction tank, and the waste mud is prepared according to the mass percentage of 5.0 wt% of polyaluminium chloride, 0.95 wt% of lime, 0.05 wt% of polyacrylamide and 94 wt% of waste mud; adding 20% of polyaluminum chloride aqueous solution in formula amount by mass concentration at a stirring speed of 100-200 r/min, stirring for 10-15 min, adding lime serving as a regulator, adjusting the pH to 7-8, finally adding 0.1% of flocculant polyacrylamide aqueous solution in formula amount by mass concentration, and stirring for 3min to obtain a waste pulp mixture;
pumping the coagulated waste slurry mixture into a plate-and-frame filter press, keeping the pressure of a liquid inlet pump at 0.7-0.8 MPa and the pressing pressure of a plate-and-frame at 16-18 MPa, relieving pressure, opening the plate-and-frame after about 2-3 hours, and unloading a filter cake. And stacking the filter cake for further aging and dewatering to obtain the consolidation of the drilling waste.
Crushing and grinding the concretion of the drilling waste, enabling the powder to pass through a 50-mesh sieve, and uniformly mixing 25 wt% of quartz powder, 4 wt% of fly ash, 2 wt% of manganese concentrate powder and 69 wt% of concretion of the drilling waste after stable breaking and dehydration in a double-horizontal-shaft mixer to obtain a mixture.
The mixture is conveyed to a double-roller granulator to be compacted, extruded and cut to prepare coarse ball blanks, and then the coarse ball blanks are conveyed to a ball forming disc to roll to form raw material balls.
The raw material balls are processed by a rotary furnace with the installation gradient of 3 percent, and then are processed by the processes of drying, preheating, roasting, discharging and cooling in sequence to prepare finished product ceramsite; the drying temperature of the raw material balls is 120-150 ℃, the drying time is 35-40 min, and the used heat is the waste heat generated in the discharging ceramsite cooling process; the preheating temperature is 600-650 ℃, and the preheating time is 15-20 min; the temperature of the roasting section is 1160-1180 ℃, and the roasting time is 5-10 min; the ceramic aggregate is taken out of the kiln at the temperature of 900-1000 ℃ and the cooling time is 3-5 min. Directly cooling by air after discharging, wherein the discharging temperature of the ceramsite is lower than 80 ℃.
Example 6
Waste slurry collected in a well site is mixed in a coagulation reaction tank according to the mass percentage of 5.5 wt% of polymeric ferric sulfate, 0.45 wt% of caustic soda, 0.05 wt% of polyacrylamide and 94 wt% of waste slurry; adding 20% of polyferric sulfate aqueous solution in formula amount by mass concentration at a stirring speed of 100-200 r/min, stirring for 10-15 min, adding sodium hydroxide as a regulator, adjusting pH to 7-8, finally adding 0.1% of flocculant polyacrylamide aqueous solution in formula amount by mass concentration, and stirring for 3min to obtain a waste pulp mixture.
Pumping the coagulated waste slurry mixture into a plate-and-frame filter press, keeping the pressure of a liquid inlet pump at 0.7-0.8 MPa and the pressing pressure of a plate-and-frame at 16-18 MPa, relieving pressure, opening the plate-and-frame after about 2-3 hours, and unloading a filter cake. And stacking the filter cake for further aging and dewatering to obtain the consolidation of the drilling waste.
Crushing and grinding the concretion of the drilling waste, enabling the powder to pass through a 50-mesh sieve, and uniformly mixing the concretion of the drilling waste in a double-horizontal-shaft stirrer according to the mass percentage of 30 wt% of bauxite powder, 4 wt% of fly ash, 3 wt% of rutile powder and 63 wt% of concretion of the drilling waste after stable breaking and dehydration to obtain a mixture.
The mixture is conveyed to a double-roller granulator to be compacted, extruded and cut to prepare coarse ball blanks, and then the coarse ball blanks are conveyed to a ball forming disc to roll to form raw material balls.
The raw material balls are processed by a rotary furnace with the installation gradient of 3 percent, and then are processed by the processes of drying, preheating, roasting, discharging and cooling in sequence to prepare finished product ceramsite; the drying temperature of the raw material balls is 120-150 ℃, the drying time is 35-40 min, and the used heat is the waste heat generated in the discharging ceramsite cooling process; the preheating temperature is 600-650 ℃, and the preheating time is 15-20 min; the temperature of the roasting section is 1160-1180 ℃, and the roasting time is 5-10 min; the ceramic aggregate is taken out of the kiln at the temperature of 900-1000 ℃ and the cooling time is 3-5 min. Directly cooling by air after discharging, wherein the discharging temperature of the ceramsite is lower than 80 ℃.
Comparative example 1
Waste slurry collected in a well site is mixed in a coagulation reaction tank according to the mass percentage of 2.5 wt% of polymeric ferric sulfate, 0.45 wt% of caustic soda, 0.05 wt% of polyacrylamide and 97 wt% of waste slurry; adding 20% of polyferric sulfate aqueous solution in formula amount by mass concentration at a stirring speed of 100-200 r/min, stirring for 10-15 min, adding sodium hydroxide as a regulator, adjusting pH to 7-8, finally adding 0.1% of flocculant polyacrylamide aqueous solution in formula amount by mass concentration, and stirring for 3min to obtain a waste pulp mixture.
Pumping the coagulated waste slurry mixture into a plate-and-frame filter press, keeping the pressure of a liquid inlet pump at 0.7-0.8 MPa and the pressing pressure of a plate-and-frame at 16-18 MPa, releasing pressure, opening the plate-and-frame, unloading a filter cake, and enabling the mud cake to be in a sticky state and not to be easily unloaded after about 4-5 hours. The filter cake was placed in a pile for further aging and dewatering (twice the aging time as in example 6) to obtain a consolidation of drilling waste.
Crushing and grinding the concretion of the drilling waste, enabling the powder to pass through a 50-mesh sieve, and uniformly mixing 10 wt% of bauxite powder, 4 wt% of fly ash, 3 wt% of manganese concentrate powder and 83 wt% of concretion after the drilling waste is subjected to stable breaking and dehydration in a double-horizontal-shaft stirrer to obtain a mixture.
The mixture is conveyed to a double-roller granulator to be compacted, extruded and cut to prepare coarse ball blanks, and then the coarse ball blanks are conveyed to a ball forming disc to roll to form raw material balls.
The raw material balls are processed by a rotary furnace with the installation gradient of 3 percent, and then are processed by the processes of drying, preheating, roasting, discharging and cooling in sequence to prepare finished product ceramsite; the drying temperature of the raw material balls is 120-150 ℃, the drying time is 35-40 min, and the used heat is the waste heat generated in the discharging ceramsite cooling process; the preheating temperature is 600-650 ℃, and the preheating time is 15-20 min; the temperature of the roasting section is 1160-1180 ℃, and the roasting time is 5-10 min; the ceramic aggregate is taken out of the kiln at the temperature of 900-1000 ℃ and the cooling time is 3-5 min. Directly cooling by air after discharging, wherein the discharging temperature of the ceramsite is lower than 80 ℃. The ceramsite is seriously deformed, has different shapes and sizes, and is fully provided with larger holes in the middle.
Example 7
The physicochemical indexes of the ceramsite prepared in the examples and comparative examples of the present invention were measured according to the standard of GB/T17431.1-2010 "lightweight aggregate and test method part 1 thereof" and the standard of GB5085.3-2007 "identification of hazardous waste standard leaching toxicity", and the measurement results are shown in table 1.
TABLE 1 physicochemical indexes of ceramsite prepared in the examples of the present invention and comparative examples
From the above embodiments, the present invention provides a method for utilizing drilling waste, including: preparing a material mainly containing drilling waste into ceramsite; the drilling waste refers to water-based drilling waste, and comprises condensate of the drilling waste or condensate of the drilling waste. The invention utilizes the characteristics that the main components of the drilling waste are clay, sandstone and rich in organic matters to prepare the ceramsite with high porosity, low bulk density and certain compressive strength. The invention changes the well drilling solid waste which is difficult to dispose in the petroleum well drilling engineering into the high expansion type ceramsite which is widely applied in the industries of construction, gardening and chemical industry, realizes the harmless and resource treatment of the well drilling waste, and is an environment-friendly, economic and sustainable technology.
While only the preferred embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A method of utilizing drilling waste, comprising:
preparing a material mainly containing drilling waste into ceramsite;
the drilling waste is water-based drilling waste and comprises a cured product of the drilling waste or a cured product of the drilling waste;
the condensate of the drilling waste is a product obtained by solidifying a mixture of drill cuttings and waste mud;
the concretion of the drilling waste is a product of waste drilling mud after destabilization and dehydration treatment.
2. The method of utilizing drilling waste as claimed in claim 1, wherein the method of producing the solidified drilling waste comprises:
mixing the mixture of the drill cuttings and the waste slurry, the inorganic destabilizing agent and the composite portland cement to obtain a cured material of the drilling waste;
the inorganic destabilizing agent is selected from one of quick lime, calcium salt and magnesium salt.
3. The utilization method of the drilling waste, as claimed in claim 2, is characterized in that the mass ratio of the mixture of the drill cuttings and the waste mud, the inorganic destabilizing agent and the composite portland cement is (88-92): (3-5): (5-8).
4. The method of utilizing drilling waste as claimed in claim 1, wherein the method of preparing the solidification product of drilling waste comprises:
mixing the waste slurry, an inorganic polymer destabilizing agent, a regulator and polyacrylamide, fully reacting and destabilizing, and performing filter pressing and dehydration to obtain a consolidation of drilling waste;
the inorganic polymer destabilizing agent is selected from one of polymeric ferric chloride, polymeric ferric sulfate and polymeric aluminum chloride;
the regulator is selected from one of caustic soda and slaked lime.
5. The utilization method of the drilling waste, which is disclosed by claim 4, is characterized in that the mass ratio of the inorganic polymer destabilizing agent to the regulator to the polyacrylamide to the waste mud is (3-5): (0.5-2): (0.01-0.05): (92-96).
6. The method for utilizing drilling waste as claimed in claim 1, wherein the method comprises the following steps:
mixing the pigment, calcium magnesium powder, coal gangue powder and the condensate of the drilling waste to obtain a mixture;
granulating the mixture to obtain raw material balls;
and roasting the raw material balls to obtain the ceramsite.
7. The method for utilizing drilling waste as claimed in claim 1, wherein the method comprises the following steps:
mixing aggregate, fly ash, pigment and consolidation of drilling waste to obtain a mixture;
granulating the mixture to obtain raw material balls;
and roasting the raw material balls to obtain the ceramsite.
8. The method of utilizing drilling waste according to claim 6 or 7, wherein the pigment is one selected from the group consisting of iron concentrate powder, iron oxide powder, manganese concentrate powder, and diamond powder.
9. The method for utilizing drilling waste as claimed in claim 7, wherein the aggregate is selected from one of quartz powder, bauxite and shale.
10. The method for utilizing drilling waste as claimed in claim 6 or 7, wherein the roasting temperature is 1150-1190 ℃.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113698177A (en) * | 2021-09-28 | 2021-11-26 | 中海油田服务股份有限公司 | Method for preparing sintered ceramsite by utilizing offshore water-based drilling solid phase |
| CN115724679A (en) * | 2021-08-27 | 2023-03-03 | 中国石油天然气集团有限公司 | Low-density high-strength environment-friendly ceramsite proppant and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167562A (en) * | 2011-01-14 | 2011-08-31 | 武汉理工大学 | Drilling waste-fly ash-shale base sintering product and preparation method |
| CN102180641A (en) * | 2011-01-26 | 2011-09-14 | 中国石油大学(华东) | Method and process for high strength curing of drilling waste |
| CN107244887A (en) * | 2017-06-01 | 2017-10-13 | 中国石油化工股份有限公司 | The preparation method and application process of a kind of water base drilling cuttings absorbent filter medium |
| CN108397158A (en) * | 2018-02-08 | 2018-08-14 | 河北上善石油机械有限公司 | A kind of method for innocent treatment of drilling well solid-state castoff and its application |
| CN110407586A (en) * | 2019-08-28 | 2019-11-05 | 刘长荣 | Utilize the method for the production haydite of well drilling detritus caused by In Oil Field Exploration And Development |
| US20190345060A1 (en) * | 2018-05-10 | 2019-11-14 | Newalta Corporation | Beneficial reuse of drill cuttings |
-
2019
- 2019-12-16 CN CN201911294724.0A patent/CN112979321B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167562A (en) * | 2011-01-14 | 2011-08-31 | 武汉理工大学 | Drilling waste-fly ash-shale base sintering product and preparation method |
| CN102180641A (en) * | 2011-01-26 | 2011-09-14 | 中国石油大学(华东) | Method and process for high strength curing of drilling waste |
| CN107244887A (en) * | 2017-06-01 | 2017-10-13 | 中国石油化工股份有限公司 | The preparation method and application process of a kind of water base drilling cuttings absorbent filter medium |
| CN108397158A (en) * | 2018-02-08 | 2018-08-14 | 河北上善石油机械有限公司 | A kind of method for innocent treatment of drilling well solid-state castoff and its application |
| US20190345060A1 (en) * | 2018-05-10 | 2019-11-14 | Newalta Corporation | Beneficial reuse of drill cuttings |
| CN110407586A (en) * | 2019-08-28 | 2019-11-05 | 刘长荣 | Utilize the method for the production haydite of well drilling detritus caused by In Oil Field Exploration And Development |
Non-Patent Citations (2)
| Title |
|---|
| 何纶等: "《钻井完井液废弃物处理实用技术》", 31 March 2006, 中国矿业大学出版社 * |
| 刘恩栋等: "页岩气水基钻屑制备低密度支撑剂及性能研究", 《安全与环境学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115724679A (en) * | 2021-08-27 | 2023-03-03 | 中国石油天然气集团有限公司 | Low-density high-strength environment-friendly ceramsite proppant and preparation method thereof |
| CN115724679B (en) * | 2021-08-27 | 2023-11-03 | 中国石油天然气集团有限公司 | Low-density high-strength environment-friendly ceramsite propping agent and preparation method thereof |
| CN113698177A (en) * | 2021-09-28 | 2021-11-26 | 中海油田服务股份有限公司 | Method for preparing sintered ceramsite by utilizing offshore water-based drilling solid phase |
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