CN108316873B - Water-based drilling waste harmless treatment device and method and application - Google Patents
Water-based drilling waste harmless treatment device and method and application Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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Abstract
The invention provides a water-based drilling waste harmless treatment device, a method and application. The water-based drilling waste harmless treatment device comprises a non-landing collection unit, a liquid-phase regeneration treatment unit and a solid-phase harmless treatment unit; the non-landing collecting unit is respectively communicated with the liquid phase regeneration treatment unit and the solid phase harmless treatment unit; the liquid phase regeneration treatment unit is communicated with the solid phase innocent treatment unit. The water-based drilling waste harmless treatment device and the water-based drilling waste harmless treatment method save land and treatment cost, and save the costs of drilling waste harmless treatment, landfill pool excavation, seepage prevention and the like; indexes such as pH, COD, chromaticity, petroleum and the like for preparing the base soil and the baking-free block leachate after the drilling waste is subjected to harmless treatment meet the environmental protection requirement, the baking-free block and the base soil meet the relevant building material standards, and the regeneration, recycling and reclamation of the drilling waste are realized.
Description
Technical Field
The invention belongs to the technical field of drilling environment protection of oil and gas fields in petrochemical industry, and relates to a water-based drilling waste harmless treatment device, a method and application.
Background
The water-based drilling waste is one of main wastes generated in oil-gas exploration, development and drilling operations, accounts for 99% of the total amount of the drilling waste, and is classified into polymer drilling fluid, polymer-KCl drilling fluid, polysulfonate drilling fluid and other types of drilling waste according to different drilling fluid systems. The water-based drilling waste is a mixture of waste drilling fluid and drill cuttings, contains clay, weighting materials, various chemical treatment agents, sewage, drill cuttings and the like, has the pollution characteristics of high chroma, high COD (chemical oxygen demand), high pH value and the like, and particularly, the deep-well complex drilling waste such as polysulfonate drilling waste and the like is a difficult point for treating the water-based drilling waste. With the implementation of new environmental protection laws and the enhancement of environmental awareness of the public, the effective treatment and disposal of drilling wastes is an important problem to be solved by oil and gas field enterprises.
The traditional water-based drilling waste treatment mode is pit digging, solidification and landfill in a well site and natural evaporation. The traditional mode occupies a large area, and the area of a rock debris pool and a wastewater pool of each well is 2-3 mu; the environmental risk is large, and the mud pool of the solidified landfill is likely to crack and leak sewage due to geological disasters, so that the surrounding soil and water body are polluted; the resource waste is large, the waste mud is not recycled, and the drill cuttings are not recycled.
At present, the drilling clean production gradually and comprehensively implements the treatment without falling to the ground while drilling, and the main treatment mode is a treatment mode of 'chemical feeding, gel breaking, destabilization and filter pressing separation'. The process can realize treatment without falling to the ground while drilling and simple system drilling waste treatment, but the drilling fluid can be discharged or reinjected after gel breaking, destabilization and separation only by further treatment, thereby not only wasting resources, but also increasing the cost; has no broad spectrum and can not well realize harmless treatment on the polysulfonate drilling waste and other deep well complex drilling waste.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a water-based drilling waste harmless treatment device, a water-based drilling waste harmless treatment method and application.
The purpose of the invention is realized by the following technical scheme:
in one aspect, the invention provides a water-based drilling waste harmless treatment device, which comprises a non-landing collection unit, a liquid-phase regeneration treatment unit and a solid-phase harmless treatment unit;
the non-landing collecting unit is respectively communicated with the liquid-phase regeneration treatment unit and the solid-phase harmless treatment unit; the liquid phase regeneration treatment unit is communicated with the solid phase innocent treatment unit.
In the water-based drilling waste harmless treatment device, the non-landing collection unit is used for carrying out preliminary solid-liquid separation on the collected drilling waste, the separated liquid phase enters the liquid phase regeneration treatment unit, and the separated solid phase enters the solid phase harmless treatment unit; the liquid phase regeneration treatment unit is used for further carrying out solid-liquid separation on the entering liquid phase, the separated solid phase enters the solid phase harmless treatment unit, and the separated liquid phase is recycled after reaching the standard; the solid phase innocent treatment unit is used for recycling the entering solid phase after innocent treatment.
In the above harmless treatment device for water-based drilling waste, preferably, the non-landing collecting unit comprises a double-helix collecting pry and a solid-phase plunger pump;
a first mortar pump is arranged above the double-spiral collecting pry and communicated with the liquid phase regeneration treatment unit, and the first mortar pump is used for pumping upper-layer liquid phase drilling waste into the liquid phase regeneration treatment unit;
the bottom of the double-spiral collecting pry is provided with a double-spiral conveyor and a sediment scraping blade, and the end of the double-spiral collecting pry is communicated with the solid-phase plunger pump; the bottom sediment scraping blade is used for stirring lower-layer solid-phase drilling waste, and the double-helix conveyor is used for conveying the lower-layer solid-phase drilling waste into the solid-phase plunger pump; and the solid-phase plunger pump is communicated with the solid-phase harmless treatment unit.
In the water-based well drilling waste harmless treatment device, the double-helix device in the double-helix collecting pry is arranged at the bottom of the collecting pry. The double helix is used for bidirectional stirring, so that the drilling waste is prevented from depositing sand at the lower part of the collecting pry; the sediment scraping blade that collection sled bottom set up for stir lower floor solid phase drilling discarded object, further in order to prevent that the drilling discarded object sediment from piling up.
In the above-mentioned water-based drilling waste harmless treatment device, preferably, the solid-phase plunger pump is disposed in the double-spiral collecting pry. The pump pressure of the solid-phase plunger pump can reach more than 20 MPa; and the rotor of the solid-phase plunger pump is made of metal. The double-helix collecting pry and the solid-phase plunger pump are matched for use, so that the problems that solid-phase materials with low water content (30% -40%) cannot be conveyed, rotors cannot be abraded and the like can be solved.
In the above harmless treatment device for water-based drilling waste, preferably, a flow meter is disposed on a pipeline connecting the first mortar pump and the liquid phase regeneration treatment unit.
In the above harmless treatment device for water-based drilling waste, preferably, the non-landing collection unit further comprises a spiral receiving conveyor which is communicated with the double-spiral collection sled and is used for receiving and conveying the drill cuttings discharged by the sand-removing desliming device and the drilling team centrifuge into the double-spiral collection sled.
In the above harmless treatment device for water-based drilling waste, preferably, the non-landing collection unit further comprises a drilling solid control vibrating screen which is communicated with the double-spiral collection pry and used for dropping the drilling waste into the double-spiral collection pry through a chute.
In the above harmless treatment device for water-based drilling waste, preferably, the double helix collecting pry is positioned below the drilling solid control vibrating screen. Drilling waste discharged by the drilling solid control vibrating screen falls into the double-helix collecting pry through the chute, the double-helix collecting pry is positioned below the drilling solid control, the volume can reach 5-10, the phenomena of slurry leakage and overflow and the like in a drilling site can be well solved, and mud is effectively prevented from falling to the ground.
In the above harmless treatment device for water-based drilling waste, preferably, the liquid-phase regeneration treatment unit comprises a high-G vibrating screen and a normal pump;
the solid phase outlet of the high-G vibrating screen is communicated with the ordinary pump, and the ordinary pump is communicated with the solid phase harmless treatment unit; and the liquid phase conveyed out by the non-landing collecting unit is communicated with the high-G vibrating screen.
In the above harmless treatment device for water-based drilling waste, preferably, the liquid phase regeneration treatment unit further comprises a variable frequency centrifuge, and a liquid phase outlet of the high-G vibrating screen is communicated with the variable frequency centrifuge; the solid phase outlet of the frequency conversion centrifugal machine is communicated with the ordinary pump;
in the above harmless treatment device for water-based drilling waste, preferably, the liquid-phase regeneration treatment unit further comprises an electrochemical treatment machine, and a liquid-phase outlet of the variable frequency centrifuge is communicated with the electrochemical treatment machine; and the solid phase outlet of the electrochemical processor is communicated with the common pump.
In the above harmless treatment device for water-based drilling waste, preferably, a second mortar pump is arranged on a pipeline connecting the liquid phase outlet of the high-G vibrating screen and the variable frequency centrifuge, and the second mortar pump is used for pumping the liquid phase obtained from the liquid phase outlet of the high-G vibrating screen into the variable frequency centrifuge.
In the above harmless treatment apparatus for water-based drilling waste, preferably, a third slurry pump is disposed on a pipeline connecting the liquid phase outlet of the variable frequency centrifuge and the electrochemical treatment machine, and the third slurry pump is configured to pump the liquid phase obtained from the liquid phase outlet of the variable frequency centrifuge into the electrochemical treatment machine.
In the above harmless treatment device for water-based drilling waste, preferably, the solid-phase harmless treatment unit comprises a first-stage weighing mixing screw machine and a harmless treatment agent feeding device;
the solid phase delivered by the liquid phase regeneration treatment unit is communicated with the primary weighing and mixing screw machine, the solid phase delivered by the non-landing collection unit is communicated with the primary weighing and mixing screw machine, and the innocent treatment agent feeding device is communicated with the primary weighing and mixing screw machine.
In the above harmless treatment device for water-based drilling waste, preferably, the solid-phase harmless treatment unit further comprises a secondary mixing screw machine, and the primary weighing mixing screw machine is communicated with the secondary mixing screw machine.
In the above harmless treatment device for water-based drilling waste, preferably, the harmless treatment device for water-based drilling waste further comprises a solid phase recycling unit, and the solid phase recycling unit is used for preparing the solid phase treated by the solid phase harmless treatment unit into the baking-free building block.
In the above harmless treatment device for water-based drilling waste, preferably, the solid-phase recycling unit comprises a dosing machine, a stirrer, a belt conveyor, a full-automatic plate stacking machine and a full-automatic brick pressing machine. The process of preparing the non-fired blocks is a routine operation in the art.
In another aspect, the present invention further provides a harmless treatment process for water-based drilling waste, which uses the above-mentioned harmless treatment apparatus for water-based drilling waste, and comprises the following steps:
after the drilling waste and the drill cuttings are collected and separated by the non-landing collecting unit, the liquid phase enters the liquid phase regeneration treatment unit, the solid phase enters the solid phase harmless treatment unit, and the harmless liquid phase is obtained after the treatment of the liquid phase regeneration treatment unit and is used for recycling; the solid phase treated by the liquid phase regeneration treatment unit enters a solid phase harmless treatment unit, and the solid phase treated by the harmless treatment unit is obtained after the solid phase in the harmless treatment unit is mixed with a harmless treatment agent for treatment, so that the solid phase is used for preparing paving base stones and/or baking-free building blocks;
in the harmless treatment process of the water-based drilling waste, the method preferably comprises the following steps:
drilling waste discharged by the drilling solid control vibrating screen falls into a double-helix collecting pry through a chute, drilling cuttings discharged by a drilling team centrifuge are received by a helix receiving conveyor and then are sent to the double-helix collecting pry, after caching and primary solid-liquid separation, upper-layer liquid-phase drilling waste (the liquid content is more than 60%) is pumped into the high-G vibrating screen through a first mortar pump, the pumping speed is controlled through a flowmeter, and lower-layer solid-phase drilling waste (the liquid content is less than 60%) is conveyed into a solid-phase plunger pump through the double-helix conveyor; when the bottom sediment seriously affects the fluidity, the sediment scraper is opened to stir the solid-phase drilling waste at the lower layer, so that the fluidity of the solid-phase drilling waste at the lower layer is improved;
the liquid phase separated by the high G vibrating screen enters a buffer tank below the high G vibrating screen and is pumped into a variable frequency centrifuge through a second mortar pump for continuous separation, and the solid phase separated by the high G vibrating screen is conveyed into a first-stage weighing and mixing screw machine through a common pump; conveying the solid phase separated by the variable frequency centrifuge into a primary weighing and mixing screw machine through a common pump, if the liquid phase index separated by the variable frequency centrifuge cannot reach the performance index of water-based drilling fluid recycling, pumping the liquid phase separated by the variable frequency centrifuge into an electrochemical treatment machine by using a third mortar pump for advanced treatment until a liquid phase reaching the standard is obtained, and conveying the solid phase separated by the electrochemical treatment machine into the primary weighing and mixing screw machine through the common pump;
putting a harmless treatment agent into the primary weighing and mixing screw machine through a harmless treatment agent adding device, and mixing by the primary weighing and mixing screw machine and the secondary mixing and mixing screw machine to obtain a treated solid phase;
detecting pollutants in the treated solid phase, and using the solid phase as a paving base stone to pave and cushion well site roads after the solid phase is qualified; or the treated solid phase enters a solid phase recycling unit to be used for preparing the baking-free brick.
In the harmless treatment process of the water-based drilling waste, the electrochemical treatment machine has been separately applied for a patent with the patent application number of 201710804281.X, and the electrochemical treatment machine is an electrochemical adsorption treatment device in the separately applied patent and is incorporated by reference in its entirety.
In the above harmless treatment process for water-based drilling waste, preferably, the mass ratio of the addition amount of the harmless treatment agent to the solid phase in the first-stage weighing and mixing screw machine is 1: (0.1-0.15).
In the harmless treatment process of the water-based drilling waste, the proportion of the addition amount of the harmless treatment agent and the solid phase is the optimal proportion obtained by long-term creative work of the inventor. When the device is used for treating solid-phase waste, the solid-phase water content in each time of entering the mixing and stirring screw machine is different, the condition of 'under treatment' (incapable of meeting the requirement of environmental protection) or 'over treatment' (increasing the treatment cost) exists in the improper proportion of the harmless treatment agent, and the requirements of environmental protection and treatment cost can be met under the proportion. By adopting the optimal proportion combination in the invention, the pollutants in the solid phase after the harmlessness is lower than the soil environment quality standard, and the leachate is as follows: the pH value is 6-9, the chroma is less than or equal to 50, the COD is less than or equal to 100mg/L, the petroleum is less than or equal to 5mg/L, the primary discharge standard of GB8978-1996 national Integrated wastewater discharge Standard can be achieved, and the composite material can be used as a building material or directly used for laying well sites.
In the harmless treatment process of the water-based drilling waste, the harmless treatment agent is an independently developed agent, an aqueous solution polymerization method is adopted, an oxidant and a reducing agent are added into an aqueous solution containing a nonionic monomer, an anionic monomer and a drilling waste liquid decolorizing agent, the reaction is carried out under the initiation condition of the first oxidation reduction system, and the solid-phase harmless treatment agent of the water-based drilling waste is obtained through post treatment. The harmless treatment agent is mainly used for fixing or converting harmful substances in solid-phase wastes such as drill cuttings and the like into low-toxicity or non-toxic substances, so that the environmental protection index meets the national or local standard requirement, and the harmless treatment agent can be further recycled only if the environmental protection standard requirement is met. The innocent treatment has been patented under application number 201710701578.3, which is incorporated herein by reference in its entirety.
In the harmless treatment process of the water-based drilling waste, the screen of the high-G vibrating screen is preferably 200-230-mesh screen.
In the harmless treatment process of the water-based drilling waste, preferably, the rotating speed of the frequency conversion centrifuge for obtaining the liquid phase reaching the standard is 2800 rpm-3400 rpm in the solid-liquid separation process.
In the harmless treatment process of the water-based drilling waste, the collection unit without falling to the ground abandons the traditional pit digging, curing and landfill mode, eliminates the hidden environmental hazards, overcomes the defects by adopting the collection pry for assembling the mortar pump, the double-screw conveyor and the bottom mud scraping blade and solves the problem that the solid phase is difficult to convey and discharge due to the accumulation of the solid phase at the lower part of the collection buffer.
In the water-based drilling waste harmless treatment process, no medicament is added to the liquid phase subjected to harmless treatment by the liquid phase regeneration treatment unit, so that the damage to the effective components of the drilling fluid is small, the problem that the waste drilling fluid is not effectively recycled due to medicament addition in the conventional while-drilling non-falling treatment technology is solved, the drilling fluid resource is recycled, and the drilling cost is saved.
In the harmless treatment process of the water-based drilling waste, pollutants in a solid phase after the harmless treatment in the solid-phase harmless treatment unit are lower than the soil environment quality standard, and the leachate is as follows: the pH value is 6-9, the chroma is less than or equal to 50, the COD is less than or equal to 100mg/L, and the petroleum is less than or equal to 5mg/L, and the composite material can be used as a building material or used for paving well sites.
In the above-mentioned water base drilling discarded object innocent treatment technology, first mortar pump, second mortar pump and third mortar pump can be vertical structure.
The invention relates to a complete water-based drilling waste harmless treatment device and a complete water-based drilling waste harmless treatment process, wherein: (1) the units are skid-mounted and modularized, the pipeline connection between the skid bodies can adopt quick joints for connection, and proper combination deformation is carried out according to the field requirement; the total occupied area of the device is 630m2The floor area is saved on the premise of better treatment; (2) an electrochemical processor is an important unit in liquid phase treatment, and after solid-liquid separation at the front end, harmful solid phases and ultrafine particles with the particle size of less than or equal to 10 mu m in the waste water-based drilling fluid can not be effectively removed, so that when the performance of the recovered drilling fluid can not meet the requirement of well team recycling, the electrochemical processor needs to be started to carry out deep treatment on the liquid phase separated from the solid phase, and the inferior solid phase in the liquid phase is removed, so that the index requirement of the well team recycling is met; (3) solid phase wastes such as drill cuttings and the like generated after solid-liquid separation are treated by a harmless treating agent, so that the solid phase reaches related national or industrial standards in both environmental protection performance and building material performance. The two can be used simultaneously to exert synergistic effect, and compared with single technology, the method can simultaneously carry out harmless treatment on liquid phase and solid phase, reduce the waste treatment amount by more than 50%, and reduce the addition amount of the treating agentThe reduction is more than 20 percent.
In still another aspect, the invention also provides application of the solid phase treated by the harmless treatment process of the water-based drilling waste in preparation of paving foundation stones and/or baking-free building blocks.
The water-based drilling waste harmless treatment device and method can solve the problems of large occupied area (2-3 mu), large environmental risk and non-resource utilization of the traditional curing landfill treatment mode, and eliminate environmental hidden danger; the problem that the waste drilling fluid is not effectively recycled due to the fact that the performance and the system stability of the drilling fluid are damaged by adding chemicals in the conventional while-drilling non-landing treatment technology is solved; the problem that the conventional while-drilling non-falling-to-ground treatment technology does not effectively and harmlessly treat the polysulfonate drilling waste and other deep well complex drilling waste is solved; the problem that the performance of recovered drilling fluid can not meet the recycling requirement of a drilling team due to the fact that harmful solid phases and ultrafine particles with the particle size of less than or equal to 10 mu m in water-based drilling fluid can not be effectively removed by a conventional solid control facility or a solid-liquid separation device is solved; the process solves the problem of rough treatment mode of conventional drilling waste, can accurately measure the discharge reduction amount of the drilling waste, the treatment return amount of drilling fluid and the solid-phase harmless dosage, and can adjust the process according to different well conditions and different incoming materials.
The water-based drilling waste harmless treatment device and method provided by the invention have the following advantages:
(1) saving land and treatment cost. The well drilling field does not need to excavate a landfill pool for traditional landfill treatment, so that the land is saved, the expenses of harmless treatment of drilling cuttings, excavation of the landfill pool, seepage prevention and the like are saved, the occupied area of a single well (well depth 5000-;
(2) realizes the harmless treatment of the drilling waste. Indexes such as pH, COD, chromaticity, petroleum and the like of the leaching solution of the base soil and the non-fired building blocks prepared after the well drilling waste is subjected to harmless treatment meet the first-grade requirement of GB8978-1996, the environment is protected, the standard is reached, and the harmless treatment is realized;
(3) realizes the regeneration, reuse and resource utilization of the drilling waste. The drilling waste liquid is not treated by adding a medicament, and the drilling fluid reaches the reclamation standard of a drilling team after physical treatment; the solid-phase prepared non-fired building blocks and foundation soil after the harmless treatment meet the relevant building material standards, meet the building material standard requirements for construction before drilling, and can be used for constructing sewage ditches, retaining walls and temporary facility foundations in engineering before drilling of new wells, serving as walking roadbeds and the like;
(4) the precision of drilling waste treatment is realized. In the treatment process, the flow meter is used for metering and controlling the recycling of the drilling fluid; the added agents are measured and weighed by a weighing device, and the adding amount of the agents can be adjusted in real time according to a slurry system and the lithology of drill cuttings.
Drawings
FIG. 1 is a process flow diagram of a water-based drilling waste harmless treatment apparatus in example 1 of the present invention;
FIG. 2 is a process flow diagram of a non-landing collection unit in example 1 of the present invention;
FIG. 3 is a process flow diagram of a liquid phase regeneration treatment unit in example 1 of the present invention;
FIG. 4 is a flow chart of a solid phase innocent treatment unit in example 1 of the present invention;
description of the symbols of the drawings:
the device comprises a non-landing collecting unit 1, a liquid-phase regeneration treating unit 2, a solid-phase harmless treating unit 3, a solid-phase recycling unit 4, a drilling solid control vibrating screen 5, a sand and mud remover 6, a drilling team centrifuge 7, a double-helix collecting pry 8, a first mortar pump 9, a flowmeter 10, a helix receiving conveyor 11, a solid-phase plunger pump 12, a high-G vibrating screen 13, a frequency conversion centrifuge 14, an electrochemical processor 15, a pump 16, a first-level weighing and mixing screw machine 17, a second-level mixing screw machine 18 and a harmless treating agent adding device 19.
Detailed Description
The technical solutions of the present invention will be described in detail below in order to clearly understand the technical features, objects, and advantages of the present invention, but the present invention is not limited to the practical scope of the present invention.
Example 1
The present embodiment provides a harmless treatment device for water-based drilling waste, as shown in fig. 1, the harmless treatment device for water-based drilling waste comprises a non-landing collection unit 1, a liquid-phase regeneration treatment unit 2, a solid-phase harmless treatment unit 3 and a solid-phase resource unit 4;
as shown in fig. 2, the non-landing collection unit 1 includes a double helix collection sled 8, a solid phase plunger pump 12, a helical receiving conveyor 11, and a well drilling solid control shaker 5. As shown in fig. 3, the liquid-phase regeneration treatment unit 2 includes a high-G vibrating screen 13, a variable-frequency centrifuge 14, an electrochemical processor 15, and a prim pump 16; as shown in FIG. 4, the solid-phase innocent treatment unit 4 comprises a primary weighing mixing screw machine 17, a secondary mixing screw machine 18 and an innocent treatment agent feeding device 19.
And a first mortar pump 9 is arranged above the double-helix collecting pry 8, the first mortar pump 9 is communicated with a high-G vibrating screen 13, a flow meter 10 is arranged on a pipeline communicated with the first mortar pump 9, and the first mortar pump 9 is used for pumping upper-layer liquid-phase drilling waste into the high-G vibrating screen 13. The bottom of the double-helix collecting pry 8 is provided with a double-helix conveyor and a sediment scraping blade (not shown in the attached drawing), and the end of the double-helix collecting pry is communicated with a solid-phase plunger pump 12; the bottom sediment scraper is used for stirring the solid-phase drilling waste on the lower layer, and the double-helix conveyor is used for conveying the solid-phase drilling waste on the lower layer to the solid-phase plunger pump 12; the solid phase plunger pump 12 is communicated with a first-stage weighing and mixing screw machine 17.
The spiral receiving conveyor 11 is communicated with the double-spiral collecting pry 8 and is used for receiving drill cuttings discharged by the sand and mud remover 6 and the drilling team centrifuge 7 and conveying the drill cuttings to the double-spiral collecting pry 8; the drilling solid control vibrating screen 5 is communicated with the double-helix collecting pry 8 and is used for enabling drilling wastes to fall into the double-helix collecting pry 8 through a sliding groove.
The solid phase outlet of the high G vibrating screen 13 is communicated with a common pump 16, the liquid phase outlet of the high G vibrating screen 13 is communicated with a variable frequency centrifuge 14, the solid phase outlet of the variable frequency centrifuge 14 is communicated with the common pump 16, and the liquid phase outlet of the variable frequency centrifuge 14 is communicated with an electrochemical processor 15; the solid phase outlet of the electrochemical processor 15 is communicated with a common pump 16, and the common pump 16 is communicated with a first-stage weighing and stirring screw machine 17.
A second mortar pump (not shown in the drawing) is arranged on a pipeline through which the liquid phase outlet of the high-G vibrating screen 13 is communicated with the variable-frequency centrifuge 14, and the second mortar pump is used for pumping the liquid phase obtained from the liquid phase outlet of the high-G vibrating screen 13 into the variable-frequency centrifuge 14; a third slurry pump (not shown in the drawing) is arranged on a pipeline through which the liquid phase outlet of the variable frequency centrifuge 14 is communicated with the electrochemical processor 15, and the third slurry pump is used for pumping the liquid phase obtained from the liquid phase outlet of the variable frequency centrifuge 14 into the electrochemical processor 15.
The primary weighing and mixing screw machine 17 is communicated with the secondary mixing and mixing screw machine 18, and the harmless treatment agent adding device 19 is communicated with the primary weighing and mixing screw machine 17; the secondary mixing screw machine 18 is communicated with the solid phase recycling unit 4, and the solid phase recycling unit 4 is used for preparing the solid phase subjected to solid phase harmless treatment into paving base stones and/or baking-free building blocks. The solid-phase recycling unit 4 comprises a batching machine, a stirrer, a belt conveyor, a full-automatic plate stacking machine and various devices in a full-automatic brick press.
Example 2
This example also provides a harmless treatment process for water-based drilling waste, which uses the harmless treatment apparatus for water-based drilling waste provided in example 1 to treat drilling waste of a conventional natural gas well polymer system, comprising the following steps:
drilling waste discharged by a drilling solid control vibrating screen 5 falls into a double-spiral collecting pry 8 through a chute, drilling cuttings discharged by a drilling team centrifuge 7 are received by a spiral receiving conveyor 11 and then are sent into the double-spiral collecting pry 8, after caching and primary solid-liquid separation, upper-layer liquid-phase drilling waste (the liquid content is more than 60%) is pumped into a high-G vibrating screen 13 through a first mortar pump 9, the pumping speed is controlled through a flowmeter 10, and lower-layer solid-phase drilling waste (the liquid content is less than 60%) is conveyed into a solid-phase plunger pump 12 through the double-spiral conveyor; when the bottom sediment seriously affects the fluidity, the sediment scraper is opened to stir the solid-phase drilling waste at the lower layer, so that the fluidity of the solid-phase drilling waste at the lower layer is improved;
the liquid phase separated by the high-G vibrating screen 13 enters a buffer tank below the high-G vibrating screen and is pumped into a variable frequency centrifuge 14 through a second mortar pump for continuous separation, and the solid phase separated by the high-G vibrating screen 13 is conveyed into a first-stage weighing and mixing screw machine 17 through a common pump 16; the solid phase separated by the frequency conversion centrifuge 14 is conveyed to a primary weighing and mixing screw machine 17 through a common pump 16, a harmless treatment agent is thrown into the primary weighing and mixing screw machine 17 through a harmless treatment agent throwing device 19, and the solid phase after treatment is obtained after mixing and mixing through the primary weighing and mixing screw machine 17 and a secondary mixing and mixing screw machine 18. Wherein the mass ratio of the addition amount of the harmless treatment agent to the solid phase in the first-stage weighing and mixing screw machine 17 is 1: the screen of the 0.1, high G vibrating screen 13 is 200 mesh screen.
The implementation also provides the application of the solid phase treated by the harmless treatment process in preparing paving foundation stones. And (4) carrying out pollutant detection on the solid phase subjected to harmless treatment, and using the solid phase as a paving base stone for paving well site roads after the solid phase is qualified.
Example 3
The implementation provides a harmless treatment process for water-based drilling waste, which adopts the harmless treatment device for water-based drilling waste provided in embodiment 1 to treat drilling waste of a certain shale gas well KCl-polymer system, and comprises the following steps:
drilling waste discharged by a drilling solid control vibrating screen 5 falls into a double-spiral collecting pry 8 through a chute, drilling cuttings discharged by a drilling team centrifuge 7 are received by a spiral receiving conveyor 11 and then are sent into the double-spiral collecting pry 8, after caching and primary solid-liquid separation, upper-layer liquid-phase drilling waste (the liquid content is more than 60%) is pumped into a high-G vibrating screen 13 through a first mortar pump 9, the pumping speed is controlled through a flowmeter 10, and lower-layer solid-phase drilling waste (the liquid content is less than 60%) is conveyed into a solid-phase plunger pump 12 through the double-spiral conveyor; when the bottom sediment seriously affects the fluidity, the sediment scraper is opened to stir the solid-phase drilling waste at the lower layer, so that the fluidity of the solid-phase drilling waste at the lower layer is improved;
the liquid phase separated by the high-G vibrating screen 13 enters a buffer tank below the high-G vibrating screen and is pumped into a variable frequency centrifuge 14 through a second mortar pump for continuous separation, and the solid phase separated by the high-G vibrating screen 13 is conveyed into a first-stage weighing and mixing screw machine 17 through a common pump 16; the solid phase separated by the frequency conversion centrifuge 14 is conveyed to a primary weighing and mixing screw machine 17 through a common pump 16, a harmless treatment agent is thrown into the primary weighing and mixing screw machine 17 through a harmless treatment agent throwing device 19, and the solid phase after treatment is obtained after mixing and mixing through the primary weighing and mixing screw machine 17 and a secondary mixing and mixing screw machine 18. Wherein the mass ratio of the addition amount of the harmless treatment agent to the solid phase in the first-stage weighing and mixing screw machine 17 is 1: the screen of the 0.15, high G vibrating screen 13 is 230 mesh screen.
The implementation also provides the application of the solid phase treated by the harmless treatment process in preparing the baking-free building block. And (3) enabling the solid phase subjected to harmless treatment to enter a solid phase recycling unit 4, and preparing a baking-free building block by adopting a conventional method, wherein the baking-free building block is used for paving a near platform open shaft protection face wall.
Example 4
The implementation provides a harmless treatment process for water-based drilling waste, which adopts the harmless treatment device for water-based drilling waste provided by the embodiment 1 to treat drilling waste of a polysulfonate system of a certain natural gas well, and comprises the following steps:
drilling waste discharged by a drilling solid control vibrating screen 5 falls into a double-spiral collecting pry 8 through a chute, drilling cuttings discharged by a drilling team centrifuge 7 are received by a spiral receiving conveyor 11 and then are sent into the double-spiral collecting pry 8, after caching and primary solid-liquid separation, upper-layer liquid-phase drilling waste (the liquid content is more than 60%) is pumped into a high-G vibrating screen 13 through a first mortar pump 9, the pumping speed is controlled through a flowmeter 10, and lower-layer solid-phase drilling waste (the liquid content is less than 60%) is conveyed into a solid-phase plunger pump 12 through the double-spiral conveyor; when the bottom sediment seriously affects the fluidity, the sediment scraper is opened to stir the solid-phase drilling waste at the lower layer, so that the fluidity of the solid-phase drilling waste at the lower layer is improved;
the liquid phase separated by the high-G vibrating screen 13 enters a buffer tank below the high-G vibrating screen and is pumped into a variable frequency centrifuge 14 through a second mortar pump for continuous separation, and the solid phase separated by the high-G vibrating screen 13 is conveyed into a first-stage weighing and mixing screw machine 17 through a common pump 16; the solid phase separated by the frequency conversion centrifugal machine 14 is conveyed to a first-stage weighing and mixing screw machine 17 through a common pump 16, if the liquid phase index separated by the frequency conversion centrifugal machine 14 cannot reach the performance index of the water-based drilling fluid recycling, the liquid phase index is pumped into an electrochemical processor 15 by a third mortar pump for advanced treatment, and harmful solid phase and ultrafine particles with the particle size less than or equal to 10 mu m in the drilling fluid are separated until the liquid phase which reaches the standard and is subjected to harmless treatment is obtained and is used as the drilling fluid recycling; meanwhile, the solid phase separated by the electrochemical processor 15 is conveyed into a first-stage weighing and mixing screw machine 17 through a common pump 16; and (3) putting the harmless treatment agent into the primary weighing and mixing screw machine 17 through a harmless treatment agent adding device 19, and mixing the harmless treatment agent by the primary weighing and mixing screw machine 17 and the secondary mixing and mixing screw machine 18 to obtain a treated solid phase. Wherein the mass ratio of the addition amount of the harmless treatment agent to the solid phase in the first-stage weighing and mixing screw machine 17 is 1: the screen of the 0.15, high G vibrating screen 13 is 230 mesh screen.
The implementation also provides the application of the solid phase treated by the harmless treatment process in preparing the baking-free building block. And (3) enabling the solid phase subjected to harmless treatment to enter a solid phase recycling unit 4, and preparing a baking-free building block by adopting a conventional method, wherein the baking-free building block is used for paving a near platform open shaft protection face wall.
This example shows a method for evaluating the properties of a liquid phase and a solid phase after a detoxification treatment
1. Leachate evaluation method and harmless treatment performance evaluation thereof
Monitoring of relevant indexes of the drill cutting resource product leachate (leachate after preparing the baking-free building blocks) is carried out according to the standards of Water and wastewater monitoring and analyzing method and the like. The analysis items are as follows: pH, Chemical Oxygen Demand (COD), color, petroleum. The pH value is detected according to GB6920-1986 glass electrode method for measuring water quality pH value, COD is detected according to GB11914-1989 potassium dichromate method for measuring water quality chemical oxygen demand, petroleum is detected according to HJ637-2012 infrared oil measuring method for measuring water quality petroleum and animal and vegetable oils, and chroma is detected according to GB11903-89 dilution multiple method for measuring water quality chroma.
2. Method for detecting compressive strength of baking-free building block
The detection is carried out according to GBT2542-2012 'method for testing wall bricks'.
3. Radioactivity detection method for baking-free building block
Detection was performed according to GB 6566-.
The results are shown in tables 1, 2 and 3. Table 1 shows the results of the performance test of the harmless index of the leachate, table 2 shows the results of the drilling fluid recovery performance test, and table 3 shows the results of the performance index test of the drill cutting resource product (non-fired block).
TABLE 1
TABLE 2
TABLE 3
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (4)
1. A water-based drilling waste harmless treatment process adopts a water-based drilling waste harmless treatment device, and comprises the following steps:
drilling waste discharged by the drilling solid control vibrating screen falls into the double-spiral collecting pry through the chute, drilling cuttings discharged by a drilling team centrifuge are received by the spiral receiving conveyor and then are sent into the double-spiral collecting pry, after caching and preliminary solid-liquid separation, upper-layer liquid-phase drilling waste is pumped into the high-G vibrating screen through a first mortar pump, the pumping speed is controlled through a flow meter, and lower-layer solid-phase drilling waste is conveyed into a solid-phase plunger pump through the double-spiral conveyor; when the bottom sediment seriously affects the fluidity, the sediment scraper is opened to stir the solid-phase drilling waste at the lower layer, so that the fluidity of the solid-phase drilling waste at the lower layer is improved;
the liquid phase separated by the high G vibrating screen enters a buffer tank below the high G vibrating screen and is pumped into a variable frequency centrifuge through a second mortar pump for continuous separation, and the solid phase separated by the high G vibrating screen is conveyed into a first-stage weighing and mixing screw machine through a common pump; conveying the solid phase separated by the variable frequency centrifuge into a primary weighing and mixing screw machine through a common pump, if the liquid phase index separated by the variable frequency centrifuge cannot reach the performance index of water-based drilling fluid recycling, pumping the liquid phase separated by the variable frequency centrifuge into an electrochemical treatment machine by using a third mortar pump for advanced treatment until a liquid phase reaching the standard for harmless treatment is obtained for recycling, and conveying the solid phase separated by the electrochemical treatment machine into the primary weighing and mixing screw machine through the common pump;
putting a harmless treatment agent into the primary weighing and mixing screw machine through a harmless treatment agent adding device, and mixing by the primary weighing and mixing screw machine and the secondary mixing and mixing screw machine to obtain a treated solid phase;
detecting pollutants in the treated solid phase, and using the solid phase as a paving base stone to pave and cushion well site roads after the solid phase is qualified; or the treated solid phase enters a solid phase recycling unit to be used for preparing the baking-free brick;
the water-based drilling waste harmless treatment device comprises a non-landing collection unit, a liquid-phase regeneration treatment unit, a solid-phase harmless treatment unit and a solid-phase recycling unit;
the non-landing collecting unit is respectively communicated with the liquid-phase regeneration treatment unit and the solid-phase harmless treatment unit; the liquid phase regeneration treatment unit is communicated with the solid phase harmless treatment unit;
the non-landing collecting unit comprises a double-helix collecting pry and a solid-phase plunger pump;
a first mortar pump is arranged above the double-spiral collecting pry and communicated with the liquid phase regeneration treatment unit, and the first mortar pump is used for pumping upper-layer liquid phase drilling waste into the liquid phase regeneration treatment unit;
the bottom of the double-spiral collecting pry is provided with a double-spiral conveyor and a sediment scraping blade, and the end of the double-spiral collecting pry is communicated with the solid-phase plunger pump; the bottom sediment scraping blade is used for stirring lower-layer solid-phase drilling waste, and the double-helix conveyor is used for conveying the lower-layer solid-phase drilling waste into the solid-phase plunger pump; the solid-phase plunger pump is communicated with the solid-phase harmless treatment unit; the solid-phase plunger pump is arranged in the double-spiral collecting pry; the pump pressure of the solid-phase plunger pump can reach more than 20 MPa; the rotor of the solid-phase plunger pump is made of metal;
a flow meter is arranged on a pipeline of the first mortar pump communicated with the liquid phase regeneration treatment unit;
the non-landing collecting unit also comprises a spiral receiving conveyor which is communicated with the double-spiral collecting pry and is used for receiving drill cuttings discharged by the sand-removing mud remover and the drilling team centrifuge and conveying the drill cuttings into the double-spiral collecting pry;
the non-landing collecting unit also comprises a drilling solid control vibrating screen which is communicated with the double-spiral collecting pry and used for enabling drilling wastes to fall into the double-spiral collecting pry through a sliding chute;
the liquid phase regeneration treatment unit comprises a high-G vibrating screen and a common pump;
the solid phase outlet of the high-G vibrating screen is communicated with the ordinary pump, and the ordinary pump is communicated with the solid phase harmless treatment unit; the liquid phase conveyed by the non-landing collecting unit is communicated with the high-G vibrating screen;
the liquid phase regeneration treatment unit also comprises a variable frequency centrifuge, and a liquid phase outlet of the high G vibrating screen is communicated with the variable frequency centrifuge; the solid phase outlet of the frequency conversion centrifugal machine is communicated with the ordinary pump;
the liquid phase regeneration treatment unit also comprises an electrochemical treatment machine, and a liquid phase outlet of the variable frequency centrifuge is communicated with the electrochemical treatment machine; the solid phase outlet of the electrochemical processor is communicated with the common pump;
a second mortar pump is arranged on a pipeline, communicated with the variable frequency centrifuge, of the liquid phase outlet of the high G vibrating screen, and the second mortar pump is used for pumping the liquid phase obtained from the liquid phase outlet of the high G vibrating screen into the variable frequency centrifuge;
a third mortar pump is arranged on a pipeline through which a liquid phase outlet of the variable frequency centrifuge is communicated with the electrochemical processor, and the third mortar pump is used for pumping a liquid phase obtained from the liquid phase outlet of the variable frequency centrifuge into the electrochemical processor;
the solid-phase harmless treatment unit comprises a primary weighing mixing screw machine and a harmless treatment agent feeding device;
the solid phase conveyed by the liquid phase regeneration treatment unit is communicated with the primary weighing and mixing screw machine, the solid phase conveyed by the non-landing collection unit is communicated with the primary weighing and mixing screw machine, and the innocent treatment agent adding device is communicated with the primary weighing and mixing screw machine;
the solid-phase harmless treatment unit also comprises a secondary mixing and stirring screw machine, and the primary weighing mixing and stirring screw machine is communicated with the secondary mixing and stirring screw machine;
the solid phase recycling unit is used for preparing the solid phase treated by the solid phase harmless treatment unit into a baking-free brick; the solid-phase recycling unit comprises a proportioning machine, a stirrer, a belt conveyor, a full-automatic plate stacking machine and a full-automatic brick pressing machine.
2. The harmless treatment process of water-based drilling waste according to claim 1, characterized in that: the mass ratio of the addition amount of the harmless treatment agent to the solid phase in the first-stage weighing, mixing and spiral machine is 1: (0.1-0.15).
3. The harmless treatment process of water-based drilling waste according to claim 1, characterized in that: the screen of the high-G vibrating screen adopts a 200-230-mesh screen.
4. The harmless treatment process of water-based drilling waste according to claim 1, characterized in that: the rotating speed of the frequency conversion centrifugal machine for obtaining the liquid phase reaching the standard in the solid-liquid separation process is 2800-3400 revolutions per minute.
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| CN109396156B (en) * | 2018-09-21 | 2021-06-04 | 广州市通用新产品开发有限公司 | Harmless reduction treatment method for hazardous waste |
| CN111927357A (en) * | 2019-05-13 | 2020-11-13 | 中国石油天然气集团有限公司 | Waste drilling fluid treatment device |
| CN110318696B (en) * | 2019-06-25 | 2021-10-26 | 河南省地质矿产勘查开发局第四地质矿产调查院 | Harmless treatment process for water-based waste drilling fluid |
| CN113121166A (en) * | 2019-12-31 | 2021-07-16 | 中国石油化工股份有限公司 | Drilling solid waste treatment method and application |
| CN113266288B (en) * | 2020-02-17 | 2023-06-30 | 中国石油天然气集团有限公司 | Harmless treatment device and method for water-based drilling cuttings while drilling |
| CN111360029A (en) * | 2020-03-18 | 2020-07-03 | 中国石油天然气集团有限公司 | Classification treatment and utilization method of water-based solid waste of petroleum and natural gas exploration drilling |
| CN112044916A (en) * | 2020-07-14 | 2020-12-08 | 中国石油天然气集团有限公司 | Quality-based combined resource utilization method for water-based drilling solid waste of oil and gas drilling |
| CN112282679A (en) * | 2020-11-16 | 2021-01-29 | 陕西延长石油（集团）有限责任公司 | Method and device for generating water-based drilling waste residue curing treatment formula |
| CN116065985B (en) * | 2021-12-22 | 2024-01-30 | 中国石油天然气集团有限公司 | Harmless advanced treatment method for solid-liquid waste of water-based drilling fluid |
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| CN204848472U (en) * | 2015-07-24 | 2015-12-09 | 张国臣 | Well drilling discarded object does not fall to ground innocent treatment system |
| CN105347609B (en) * | 2015-10-23 | 2018-04-13 | 中国石油化工股份有限公司 | A kind of method of drilling wastes recycling |
| CN105672948B (en) * | 2016-02-01 | 2018-09-25 | 成都国盛环境保护技术有限公司 | A kind of drilling wastes are complete to collect the technique and device for not landing harmless treatment |
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