CN115478797A - Harmless treatment device and method for drill cuttings and waste drilling fluid - Google Patents
Harmless treatment device and method for drill cuttings and waste drilling fluid Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 133
- 239000012530 fluid Substances 0.000 title claims abstract description 89
- 238000005520 cutting process Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 49
- 239000002699 waste material Substances 0.000 title claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 75
- 238000000926 separation method Methods 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000004064 recycling Methods 0.000 claims abstract description 25
- 239000007787 solid Substances 0.000 claims abstract description 23
- 239000011435 rock Substances 0.000 claims abstract description 22
- 239000002002 slurry Substances 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 14
- 239000007791 liquid phase Substances 0.000 claims description 91
- 239000007790 solid phase Substances 0.000 claims description 46
- 238000012546 transfer Methods 0.000 claims description 25
- 238000005189 flocculation Methods 0.000 claims description 24
- 230000016615 flocculation Effects 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 238000002360 preparation method Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 14
- 125000004122 cyclic group Chemical group 0.000 claims description 13
- 239000008394 flocculating agent Substances 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 230000003311 flocculating effect Effects 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000006870 function Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000013461 design Methods 0.000 description 10
- 238000005304 joining Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Classifications
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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
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
- E21B21/066—Separating solids from drilling fluids with further treatment of the solids, e.g. for disposal
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Water Supply & Treatment (AREA)
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Abstract
The invention provides a harmless treatment device and a method for drill cuttings and waste drilling fluid, wherein the method comprises the steps of oil-based drill cuttings treatment, water-based drill cuttings treatment and well completion waste drilling fluid treatment, the reduction treatment of the water-based drill cuttings, the oil-based drill cuttings and the well completion waste drilling fluid is realized by a waste drilling fluid treatment process (equipment) through novel centrifugal separation technology/equipment, the system mainly comprises a rock cuttings collection device, a feeding device, a pharmaceutical device, a solid-liquid separation device and an electric control system, and the solid-liquid separation device comprises a multifunctional centrifuge and an efficient intelligent high-speed centrifuge. The invention has the beneficial effects that: the system carries out solid-liquid separation treatment on the rock debris and well completion slurry discharged by the solid control system in the drilling process, and realizes the functions of no landing, reduction, harmless treatment and waste recycling.
Description
Technical Field
The invention relates to the field of treatment of drill cuttings and waste drilling fluid, in particular to a harmless treatment device and method for drill cuttings and waste drilling fluid.
Background
Exploration and development of petroleum and natural gas are commonly called well drilling, a medium called drilling fluid is needed in the well drilling, and the drilling fluid has the main functions of: the well bottom is cleaned, drill cuttings are carried to the ground, the drill cuttings and weighting materials are suspended, the formation of filter cakes to protect the well wall and the like is controlled and balanced, and therefore the performance of the drilling fluid needs to be controlled in the drilling process, and the smoothness of drilling is guaranteed. And in the drilling process, the drilling fluid is purified through the solid control equipment matched with the drilling machine, and the performance of the drilling fluid is maintained. The solid control equipment mainly comprises a vibrating screen, a desanding and mud removing device, a solid control centrifugal machine, a stirrer, a pump and the like, the vibrating screen, the desanding and mud removing device and the solid control centrifugal machine can discharge a large amount of drill cuttings and carry a small amount of drilling fluid, the drill cuttings are divided into 2 types, one type is water-based drill cuttings and the other type is oil-based drill cuttings, two sets of different reduction treatment equipment are required to be configured for the water-based drill cuttings and the oil-based drill cuttings, field while-drilling treatment is carried out through different treatment processes, the occupied area of the equipment is large, the personnel configuration is more, the equipment utilization rate is low, and the disposal cost is high.
Conventional treatment of water-based drill cuttings: the rock debris and the clarified liquid phase are obtained through the reduction treatment of dilution, stirring, screening and filter pressing, and then are respectively conveyed to the next-stage treatment company for treatment.
1, performing reduction treatment on the oil-based drilling cuttings through centrifugal equipment on site, and sending the reduced rock cuttings to an environment-friendly company for treatment. The advantages are that: solid-liquid separation is carried out, so that the transportation of drilling cuttings is facilitated, the post-treatment cost is saved, and part of slurry is recycled; 2. directly collecting on site, and sending to an environmental protection company for treatment.
The method for treating the waste well completion drilling fluid comprises the following steps: directly discharging, solidifying and burying or pulling to a slurry station for centralized treatment. The disadvantages are as follows: easily causes environmental pollution, resource waste and high disposal cost.
Disclosure of Invention
The invention aims to provide a harmless treatment device and method for drill cuttings and waste drilling fluid, which aim to solve the technical problem of reduction treatment of water-based drill cuttings, oil-based drill cuttings and well completion waste drilling fluid.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a multi-functional drill chip and abandonment drilling fluid processing apparatus, includes collection device, centrifuge feed pump, loading attachment, one-level buffer memory jar, multi-functional centrifuge, intelligent high speed frequency conversion centrifuge, screw conveyer, online flocculation device, tertiary buffer memory jar, outer transport pump, second grade buffer memory jar, the transfer pump, the dosing pump, charge device, collection device connects loading attachment, and loading attachment output and the multi-functional centrifuge of parallel connection, the one-level buffer memory jar is connected on the upper portion of multi-functional centrifuge, and the screw conveyer is connected to the middle part, and the loading attachment is whole to be the cuboid form, and the front portion design has the receiving funnel, uses with collection device combination, carries the material to the loading attachment receiving funnel in with collection device in, through loading attachment with the material pump in the multi-functional centrifuge, accomplish the feed, collection device is the cuboid form, the body takes the tapering all around, the middle zone spiral, and there are a plurality of pan feeding mouths at the spiral top, and the material can slide automatically to the spiral feeding mouth, through spiral conveying the material, multi-functional centrifuge is the toper form, and the top is equipped with the feed inlet, and the middle part is equipped with solid phase export, and the bottom is equipped with toper play hopper, and the toper discharge fill, and the export of the toper discharge hopper links to each other with the one-level centrifuge. There is flange one-level buffer tank top, links to each other with multi-functional centrifuge liquid outlet, collects the liquid phase that multi-functional centrifuge separates, jar face configuration agitator and level gauge, screw conveyer, tip configuration motor and speed reducer pass through the spiral of motor and speed reducer drive U-shaped inslot to carry the solid phase that multi-functional centrifuge and high-speed frequency conversion centrifuge separated, high-speed frequency conversion centrifuge feed inlet links to each other with online flocculation device, online flocculation device links to each other with charge device, and charge device is the cuboid form, and built-in collecting pipe and separated three cavity, the external side of jar are provided with all kinds of transport pipes, and the top is equipped with the feed inlet, and the bottom is equipped with the discharge gate, and the discharge gate links to each other with the dosing pump. The dosing pump is matched with the online flocculation device, the liquid outlet end of the intelligent high-speed variable-frequency centrifuge is connected with a second-level cache tank and a third-level cache tank, the second-level cache tank and the third-level cache tank are used for caching liquid phases separated by the intelligent high-speed variable-frequency centrifuge, and the tank is connected with a transfer pump.
A harmless treatment method for drill cuttings and waste drilling fluid is realized based on the multifunctional drill cuttings and waste drilling fluid treatment device, and comprises the following steps:
an oil-based drilling cutting treatment step;
a water-based drilling cutting treatment step;
and (4) processing the waste drilling fluid for well completion.
The oil-based drill cutting treatment method comprises the following steps:
the rock debris collecting device is used for uniformly collecting the oil-based drilling cuttings discharged by the solid control system;
conveying the drill cuttings to be treated into a multifunctional centrifuge through a feeding device, dividing the drill cuttings into qualified solid phases and liquid phases to be treated through the multifunctional centrifuge, collecting the qualified solid phases through a ton bag or a rock debris box, and uniformly transferring the qualified solid phases to an environment-friendly company for treatment;
liquid phase that multi-functional centrifuge separated gets into in the one-level buffer tank, and the centrifuge liquid feed pump that designs on the one-level buffer tank is in jar liquid phase pump income intelligence high speed frequency conversion centrifuge, carries out secondary centrifugation through intelligence high speed frequency conversion centrifuge, and the liquid phase that centrifuge separated gets into in second grade buffer tank or the tertiary buffer tank, confirms next step flow according to the actual parameter of liquid phase.
The water-based drilling cutting treatment method comprises a drilling fluid direct recycling step and a liquid phase re-slurry preparation recycling step.
The method for directly recycling the drilling fluid comprises the following steps:
the rock debris collecting device is used for uniformly collecting the water-based drilling cuttings discharged by the solid control system;
conveying the drill cuttings to be treated into a multifunctional centrifuge through a feeding device, dividing the drill cuttings into qualified solid phases and liquid phases to be treated through the multifunctional centrifuge, collecting the qualified solid phases through a ton bag or a rock debris box, and uniformly transferring the qualified solid phases to an environment-friendly company for treatment;
liquid phase separated by the multifunctional centrifuge enters a first-level cache tank;
pumping the liquid phase into an intelligent high-speed variable frequency centrifuge through a liquid supply pump designed on the first-level cache tank to perform secondary solid-liquid separation on the liquid phase;
the separated liquid phase enters a second-level cache tank, and is pumped into the intelligent high-speed variable frequency centrifuge again through a transfer pump designed on the second-level cache tank to carry out third-time high-speed separation;
and qualified drilling liquid phase enters the third-level buffer tank, and the drilling fluid is pumped back to the solid control circulation system through an external delivery pump arranged on the third-level buffer tank, so that the cyclic utilization of the drilling fluid is realized.
The method for recycling the liquid-phase re-slurry preparation comprises the following steps:
the rock debris collecting device is used for uniformly collecting the water-based drilling cuttings discharged by the solid control system;
the drilling cuttings to be treated are sent into a multifunctional centrifuge through a feeding device, the drilling cuttings are divided into qualified solid phase and liquid phase to be treated through the multifunctional centrifuge, the qualified solid phase is collected through a ton bag or a rock debris box and is uniformly transported to an environmental protection company for treatment, the qualified solid phase means that no seepage water exists when the ton bag is packed, the ton bag is convenient to stack, and the water content oil is less than 20%;
in the liquid phase entering first-level buffer tank that multi-functional centrifuge separated, carry out the solid-liquid separation of the second time in the intelligent high-speed variable frequency centrifuge with the liquid phase pump income through the liquid feed pump of design on first-level buffer tank, the liquid phase after the separation gets into second grade buffer tank, and the online flocculation device is sent into with the liquid phase pump once more to the last transfer pump that designs of rethread second grade buffer tank.
Add online flocculation device through charge device with the flocculating agent, get into again in the intelligent high-speed frequency conversion centrifuge after the liquid phase fully reacts with the flocculating agent in the online flocculation device, carry out the high-speed separation of third time, the clear liquid gets into tertiary buffer tank, and the clear liquid in tertiary buffer tank satisfies the standard of joining in marriage again, and the clear liquid passes through the defeated pump of tertiary buffer tank upper design, with the clear liquid pump sending to joining in marriage the thick liquid system, accomplishes whole processing procedure, realizes drilling fluid cyclic utilization. The waste drilling fluid after drilling and completing the well has two treatment methods: adjusting the performance of the drilling fluid to be directly recycled and recycling the recovered clear liquid to be prepared again for recycling.
The method for directly recycling the performance of the adjusted drilling fluid comprises the following steps:
the waste drilling fluid after well drilling and completion is transferred to a first-level cache tank through a solid control system transfer pump;
pumping the drilling fluid into the intelligent high-speed variable-frequency centrifuge through a fluid supply pump designed on the first-stage cache tank to perform first solid-liquid separation on the drilling fluid, feeding the separated liquid phase into the second-stage cache tank, pumping the drilling fluid into the intelligent high-speed variable-frequency centrifuge again through a transfer pump designed on the second-stage cache tank, and performing second high-speed separation;
the qualified drilling liquid phase enters a third-level cache tank, the drilling liquid is pumped into a tank car through an external delivery pump arranged on the third-level cache tank and is transferred to the next well, the cyclic utilization of the drilling liquid is realized, and the recycled clear liquid is prepared again for cyclic utilization, and the method comprises the following steps:
the waste drilling fluid after well drilling and completion is transferred to a first-level cache tank through a solid control system transfer pump;
pumping the drilling fluid into an intelligent high-speed variable-frequency centrifuge for carrying out first solid-liquid separation on the drilling fluid through a fluid supply pump designed on a first-stage cache tank, feeding the separated liquid phase into a second-stage cache tank, and pumping the drilling fluid into an online flocculation device again through a transfer pump designed on the second-stage cache tank;
when the second step is combined, the flocculating agent is added into the on-line flocculating device through the dosing device, and the liquid phase in the on-line flocculating device fully reacts with the flocculating agent and then enters the intelligent high-speed frequency conversion centrifugal machine again for second-time high-speed separation.
When the clear liquid enters the third-level buffer tank, the clear liquid in the third-level buffer tank meets the slurry preparation standard again, the clear liquid is pumped into the tank preparation vehicle through an external delivery pump designed on the third-level buffer tank and is transferred to the next well or slurry station, the whole treatment process is completed, and the cyclic utilization of the drilling fluid is realized.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
the invention is provided with a latest multifunctional centrifuge and an intelligent high-speed frequency conversion centrifuge; the method can realize the reuse of water-based drilling cuttings, oil-based drilling cuttings and waste well completion drilling fluid, and has the advantages of simple steps, wide application range and remarkable reduction effect; the device provided by the invention is provided with a visual interface capable of carrying out intelligent operation; the device has adopted sled dress modular design, and on-the-spot installation is convenient more quick, and the drill chip after the processing can realize directly packing the transportation, and used repeatedly can be realized to the mud after the processing, realizes not falling to the ground, minimizing, innocent treatment, waste recovery utilizes's function.
Drawings
FIG. 1 is a schematic view of the structure of an apparatus used in the present invention;
FIG. 2 is a process flow diagram of the present invention;
in the figure: 1. a collection device; 2. a centrifuge liquid feed pump; 3. a feeding device; 4. a first level cache tank; 5. a multifunctional centrifuge; 6. an intelligent high-speed frequency conversion centrifuge; 7. a screw conveyor; 8. an on-line flocculation device; 9. a third-level cache tank; 10. an output pump; 11. a second level cache tank; 12. a transfer pump; 13. a dosing pump; 14. a medicine adding device.
Detailed Description
The invention provides a harmless treatment device and method for drill cuttings and waste drilling fluid, wherein the device comprises a collecting device 1, a centrifuge liquid supply pump 2, a feeding device 3, a primary cache tank 4, a multifunctional centrifuge 5, an intelligent high-speed variable-frequency centrifuge 6, a screw conveyor 7, an online flocculation device 8, a tertiary cache tank 9, an external conveying pump 10, a secondary cache tank 11, a transfer pump 12, a dosing pump 13 and a dosing device 14, the collecting device 1 is connected with the feeding device 2, the output end of the feeding device is connected with the multifunctional centrifuge 5 in parallel, one end of the intelligent high-speed variable-frequency centrifuge 6 is connected with the primary cache tank 4, the other end of the intelligent high-speed variable-frequency centrifuge 6 is connected with the online flocculation device 8, and the upper edge part of the intelligent high-speed variable-frequency centrifuge 6 is connected with the tertiary cache tank 9.
Optionally or preferably, the collecting device 1 is cuboid, the periphery of the tank body is tapered, the middle of the tank body is provided with a spiral, the top of the spiral is provided with a plurality of feeding ports, and materials can automatically slide to the spiral feeding ports and are conveyed by the spiral.
Optionally or preferably, the feeding device 3 is integrally rectangular, the front part of the feeding device is provided with a receiving hopper, the receiving hopper is used in combination with the collecting device 1, materials stored in the collecting device 1 are conveyed into the receiving hopper, and the materials are pumped into the multifunctional centrifuge 5 through the feeding device 3 to complete feeding.
Optionally or preferably, the top end of the first-level buffer tank 4 is provided with a connecting flange connected with a liquid outlet of the multifunctional centrifuge 5, the liquid phase separated by the multifunctional centrifuge 5 is collected, and a stirrer and a liquid level meter are arranged on the tank surface.
Optionally or preferably, the multifunctional centrifuge 5 is in a conical shape, the top end of the multifunctional centrifuge is provided with a feed inlet, the middle part of the multifunctional centrifuge is provided with a liquid phase outlet, the bottom of the multifunctional centrifuge is provided with a conical solid phase discharge hopper, the feed inlet at the top end of the multifunctional centrifuge is connected with an outlet pipeline of the feeding device 2, the liquid phase outlet at the middle part of the multifunctional centrifuge is connected with the first-level buffer tank 4, and the conical solid phase discharge hopper at the bottom is connected with the screw conveyor (7).
Alternatively or preferably, a motor and a speed reducer are provided at an end of the screw conveyor 7, and the screw in the U-shaped groove is driven by the motor and the speed reducer, thereby conveying the solid phase separated by the multi-function centrifuge 5.
Optionally or preferably, its characterized in that, charge device 14 is the cuboid structure, and the jar body is divided into three chambers, and jar external side is provided with all kinds of transport pipes, and the top is equipped with the feed inlet, and the bottom is equipped with the discharge gate, and the discharge gate links to each other with dosing pump 13.
Optionally or preferably, the second-level buffer tank 11 is used for buffering the liquid phase separated by the high-speed variable frequency centrifuge 6, and a transfer pump 12 is arranged on the tank.
Optionally or preferably, the intelligent high-speed variable frequency centrifuge 6 is used for processing a liquid phase separated by the multifunctional centrifuge 5, a feed inlet of the intelligent high-speed variable frequency centrifuge 6 is connected with a liquid outlet of the centrifuge liquid feed pump 2 and the online flocculation device 8, and different parameters are selected through a matched variable frequency control system of the intelligent high-speed variable frequency centrifuge to achieve the optimal processing effect.
The drill cuttings and the waste drilling fluid are a multiphase stable suspension colloid system consisting of a solid phase, a liquid phase and other chemical agents, and the method comprises the following steps:
the oil-based drill cuttings treatment steps are as follows: the rock debris collection device 1 collects oil-based drill debris discharged by the solid control system in a unified manner, the drill debris to be processed is sent into the multifunctional centrifugal machine 5 through the feeding device 3, the drill debris is divided into qualified solid phase and liquid phase to be processed through the multifunctional centrifugal machine 5, the qualified solid phase is collected through a ton bag or a rock debris box, and the solid phase is transported to an environment-friendly company in a unified manner for processing. Qualified solid phase means that no oil leaks out when the ton bags are packed, the ton bags are conveniently stacked, and the oil content is less than 6.8 percent. The liquid phase that multi-functional centrifuge 5 separated gets into one-level cache jar 4 in, centrifuge liquid feed pump 2 of design on one-level cache jar 4 with jar interior liquid phase pump in intelligent high-speed frequency conversion centrifuge 6, carries out secondary centrifugation through intelligent high-speed frequency conversion centrifuge 6, and the liquid phase that intelligent high-speed frequency conversion centrifuge 6 separated gets into second grade cache jar 11 or tertiary cache jar 9 in, confirms next step flow according to the actual parameter of liquid phase.
The water-based drilling cutting treatment comprises (1) a drilling fluid direct recycling process and (2) a liquid-phase re-slurry preparation recycling process.
The direct recycling process of the drilling fluid comprises the following steps:
(1) the rock debris collecting device 1 collects the water-based drill debris discharged by the solid control system in a unified manner, the drill debris to be treated is sent into the multifunctional centrifugal machine 5 through the feeding device 3, the drill debris is divided into qualified solid phase and liquid phase to be treated through the multifunctional centrifugal machine 5, the qualified solid phase is collected through a ton bag or a rock debris box, and the solid phase is transported to an environmental protection company for treatment in a unified manner. Qualified solid phase means that no water seeps out when the ton bags are packed, the ton bags are conveniently stacked, and the water content and the oil content are less than 20 percent. The liquid phase separated by the multifunctional centrifuge 5 enters a first-level buffer tank. Liquid phase is pumped into a high-efficiency intelligent high-speed centrifuge 6 through a liquid supply pump 2 designed on the first-level cache tank 4 to carry out secondary solid-liquid separation on the liquid phase. And the separated liquid phase enters a secondary cache tank 11, and is pumped into the intelligent high-speed variable frequency centrifuge 6 again through a transfer pump 12 designed on the secondary cache tank 11 for high-speed separation for the third time to obtain the qualified drilling fluid meeting the recycling standard. Qualified drilling liquid enters the third-level buffer tank 9, and the drilling fluid is pumped back to the solid control circulation system through an external delivery pump 10 arranged on the third-level buffer tank 9, so that the cyclic utilization of the drilling fluid is realized.
(2) Liquid phase pulp preparation and reuse technology again:
the rock debris collecting device 1 collects the water-based drill debris discharged by the solid control system in a unified manner, the drill debris to be treated is sent into the multifunctional centrifugal machine 5 through the feeding device 3, the drill debris is divided into qualified solid phase and liquid phase to be treated through the multifunctional centrifugal machine 5, the qualified solid phase is collected through a ton bag or a rock debris box, and the solid phase is transported to an environmental protection company for treatment in a unified manner. Qualified solid phase means that no water leaks out when the ton bag is packed, the ton bag is convenient to stack, and the water content and the oil content are less than 20%. The liquid phase that multi-functional centrifuge 5 separated gets into in one-level buffer tank 4, pump the liquid phase into intelligent high speed frequency conversion centrifuge 6 through liquid feed pump 2 of design on one-level buffer tank 4 and carry out solid-liquid separation for the second time, the liquid phase after the separation gets into second level buffer tank 11, the transfer pump 12 of rethread design on second level buffer tank 11 pumps the liquid phase into in online flocculation device 8 again, and simultaneously, add the flocculating agent into online flocculation device 8 through charge device 14, the liquid phase gets into intelligent high speed frequency conversion centrifuge 6 again after flocculating agent fully reacts in flocculation device 8, carry out the high-speed separation for the third time, the clear liquid gets into tertiary buffer tank 9, the clear liquid in tertiary buffer tank 9 satisfies the standard of joining in marriage again this moment, the clear liquid passes through outer defeated pump 10 of design on tertiary buffer tank 9, pump clear liquid to joining in marriage the thick liquid system with the pump, accomplish whole processing procedure, realize drilling fluid cyclic utilization.
The waste drilling fluid after drilling and completing the well has two treatment process paths: (3) adjusting the performance of the drilling fluid for direct recycling and (4) recycling the recovered clear liquid for slurry preparation and recycling.
(3) The direct reuse technology for adjusting the performance of the drilling fluid comprises the following steps:
the waste drilling fluid after well drilling and completion is transferred to a first-level cache tank 4 through a solid control system transfer pump, the drilling fluid is pumped into an intelligent high-speed variable frequency centrifuge 6 through a fluid supply pump 2 designed on the first-level cache tank 4 to carry out first solid-liquid separation on the drilling fluid, a separated liquid phase enters a second-level cache tank 11, the drilling fluid is pumped into the intelligent high-speed variable frequency centrifuge 6 again through a transfer pump 12 designed on the second-level cache tank 11 to carry out second high-speed separation, and qualified drilling fluid meeting recycling standards is obtained. Qualified drilling liquid phase enters the third-level cache tank 9, and the drilling liquid is pumped into the tank car through an external delivery pump 10 arranged on the third-level cache tank 9 and is transferred to the next well, so that the cyclic utilization of the drilling liquid is realized.
(4) Recycling the clear liquid, preparing pulp again for recycling:
waste drilling fluid after well drilling and completion is transferred to a first-level cache tank 4 through a solid control system transfer pump, the drilling fluid is pumped into an intelligent high-speed variable-frequency centrifuge 6 through a fluid supply pump 2 designed on the first-level cache tank 4 to carry out first solid-liquid separation on the drilling fluid, a separated liquid phase enters a second-level cache tank 11, the drilling fluid is pumped into an online flocculation device 8 through a transfer pump 12 designed on the second-level cache tank 11, meanwhile, a flocculating agent is added into the online flocculation device 8 through a dosing device 14, the liquid phase enters the intelligent high-speed variable-frequency centrifuge 6 again after fully reacting with the flocculating agent, second high-speed separation is carried out, clear liquid enters a third-level cache tank 9, the clear liquid in the third-level cache tank 9 meets the standard of slurry preparation again, the clear liquid passes through an external delivery pump 10 designed on the third-level cache tank 9 to be pumped into a tank preparation vehicle and transferred to a next well or a slurry station, the whole treatment process is completed, and the cyclic utilization of the drilling fluid is realized.
One embodiment of the present invention is: when the drill cuttings and the waste drilling fluid are solid phases and a multiphase stable suspension colloid system consisting of a liquid phase and other chemical agents is adopted, the drill cuttings are firstly collected through the collecting device 1 and poured into the multifunctional centrifuge 5 through the feeding device 3 for processing, and the solid phases and the liquid phases are separated out, the waste drilling fluid is poured into the first-level cache tank 4 along with the separated drill cuttings liquid phases for storage, the liquid phases are pumped into the intelligent high-speed frequency conversion centrifuge 6 through the centrifuge liquid feeding pump 2 on the first-level cache tank 4 together, after being processed by the intelligent high-speed frequency conversion centrifuge 6, the solid phases and the liquid phases are subdivided, wherein the separated solid phases and the solid phases separated by the multifunctional centrifuge 5 are directly packed through the screw conveyor 7, the liquid phases separated by the intelligent high-speed frequency conversion centrifuge 6 are processed through detecting whether the liquid phases reach the standard or not, the qualified liquid phases are directly pumped into the third-level cache tank 9 for recycling, the unqualified liquid phases are pumped into the second-level cache tank 11, the unqualified liquid phases are pumped into the flow before the intelligent high-speed frequency conversion centrifuge 6 through the transfer pump 12 above the second-level cache tank 11, and are processed again through the chemical dosing pump 13 until the qualified liquid phases are processed by the intelligent high-speed frequency conversion centrifuge 6.
The above description is only a few preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (9)
1. A multifunctional drill chip and waste drilling fluid treatment device is characterized by comprising a collecting device (1), a centrifuge liquid supply pump (2), a feeding device (3), a first-level cache tank (4), a multifunctional centrifuge (5), an intelligent high-speed frequency conversion centrifuge (6), a screw conveyor (7), an online flocculation device (8), a third-level cache tank (9), an external conveying pump (10), a second-level cache tank (11), a transfer pump (12), a dosing pump (13) and a dosing device (14), wherein the collecting device (1) is connected with the feeding device (3), the output end of the feeding device is connected with the multifunctional centrifuge (5), the multifunctional centrifuge (5) is in a conical shape, the top end of the multifunctional centrifuge is provided with a feed inlet, the middle part of the multifunctional centrifuge is provided with a liquid phase outlet, the bottom of the multifunctional centrifuge is provided with a conical solid phase discharge hopper, the feed inlet at the top end of the multifunctional centrifuge is connected with an outlet pipeline of the feeding device (2), the middle part of the liquid phase outlet is connected with the first-level cache tank (4), the conical solid phase discharge hopper at the bottom of the multifunctional centrifuge (5) is connected with the screw conveyor (7), one end of the intelligent high-level frequency conversion centrifuge (6) is connected with the first-level cache tank (4), the other end of the intelligent high-level cache tank (9), the multifunctional centrifuge is provided with a plurality of rectangular solid phase flocculation devices, and the spiral flocculation devices at the periphery of the middle part of the multifunctional centrifuge is provided with a plurality of the spiral flocculation devices, the material can automatically slide to a spiral feeding port, the material is conveyed by a spiral, the whole feeding device (3) is in a cuboid shape, a receiving hopper is designed at the front part and is combined with the collecting device (1) for use, the material stored in the collecting device (1) is conveyed into the receiving hopper and is pumped into the multifunctional centrifuge (5) through the feeding device (3) to complete feeding, the top end of the primary cache tank (4) is provided with a connecting flange and is connected with a liquid outlet of the multifunctional centrifuge (5), the liquid phase separated by the multifunctional centrifuge (5) is collected, a tank surface is provided with a stirrer and a level gauge, the end part of the spiral conveyor (7) is provided with a motor and a speed reducer, the spiral in a U-shaped groove is driven by the motor and the speed reducer, so as to convey the solid phase separated by the multifunctional centrifuge (5), the chemical adding device (14) is in a cuboid structure, the tank body is divided into three chambers, various conveying pipes are arranged outside the tank body, the top is provided with a feeding port, the bottom end is provided with a discharging port, the discharging port is connected with a chemical adding pump (13), the secondary cache tank (11) is used for caching the liquid phase separated by the high-speed liquid phase liquid pump (6), the intelligent variable-frequency centrifuge (6) is connected with a variable frequency centrifuge (6) on-frequency control system, and the flocculation centrifuge (8) which is connected with the high-speed centrifugal-speed liquid-speed centrifugal machine, to achieve the best treatment results.
2. The method for harmlessly treating drill cuttings and waste drilling fluid is realized based on the multifunctional drill cuttings and waste drilling fluid treatment device of claim 1, and is characterized by comprising the following steps of:
s1, treating oil-based drilling cuttings;
s2, water-based drilling cutting treatment;
s3: and (5) processing the waste well drilling fluid of the well completion.
3. The method of claim 2, wherein the oil-based drill cuttings treatment method comprises the steps of:
s11, uniformly collecting the oil-based drilling cuttings discharged by the solid control system by using the rock debris collecting device (1);
s12, conveying the drill cuttings to be processed into a multifunctional centrifuge (5) through a feeding device (3), dividing the drill cuttings into qualified solid phases and liquid phases to be processed through the multifunctional centrifuge (5), collecting the qualified solid phases through a ton bag or a rock debris box, and uniformly transferring the qualified solid phases to an environment-friendly company for processing;
s13: liquid phase separated by the multifunctional centrifugal machine (5) enters a first-level cache tank (4), a centrifugal machine liquid supply pump (2) designed on the first-level cache tank (4) pumps the liquid phase in the tank into an intelligent high-speed variable-frequency centrifugal machine (6), secondary centrifugal separation is carried out through the intelligent high-speed variable-frequency centrifugal machine (6), the liquid phase separated by the centrifugal machine enters a second-level cache tank (11) or a third-level cache tank (9), and the next flow is determined according to actual parameters of the liquid phase.
4. The method of claim 2, wherein the water-based drill cuttings treatment method comprises a drilling fluid direct recycling step and a liquid-phase re-slurry preparation recycling step.
5. The method of claim 4, wherein the method for treating water-based drill cuttings and directly recycling drilling fluid comprises the following steps:
s211, uniformly collecting the water-based drilling cuttings discharged by the solid control system by using the rock debris collecting device (1);
s212, conveying the drill cuttings to be processed into a multifunctional centrifuge (5) through a feeding device (3), dividing the drill cuttings into qualified solid phases and liquid phases to be processed through the multifunctional centrifuge (5), collecting the qualified solid phases through a ton bag or a rock debris box, and uniformly transferring the qualified solid phases to an environmental protection company for processing;
s213: liquid phase separated by the multifunctional centrifuge (5) enters a first-level cache tank (4);
s214: pumping the liquid phase into an intelligent high-speed variable frequency centrifuge (6) through a liquid supply pump (2) designed on the first-level cache tank (4) to perform secondary solid-liquid separation on the liquid phase;
s215: the separated liquid phase enters a second-level cache tank (11), and is pumped into an intelligent high-speed variable frequency centrifuge (6) again through a transfer pump (12) designed on the second-level cache tank (11) for third high-speed separation;
and S216, the qualified drilling liquid phase enters a third-level buffer tank (9), and the drilling liquid is pumped back to the solid control circulation system through an external delivery pump (10) arranged on the third-level buffer tank (9), so that the cyclic utilization of the drilling liquid is realized.
6. The method of claim 4, wherein the method of treating water-based drill cuttings and reusing liquid-phase slurry comprises the following steps:
s221, uniformly collecting the water-based drilling cuttings discharged by the solid control system by using a rock debris collecting device (1);
s222, conveying the drill cuttings to be processed into a multifunctional centrifuge (5) through a feeding device (3), dividing the drill cuttings into qualified solid phases and liquid phases to be processed through the multifunctional centrifuge (5), collecting the qualified solid phases through a ton bag or a rock debris box, uniformly transferring the qualified solid phases to an environment-friendly company for processing, wherein the qualified solid phases refer to no seepage water when the ton bag is packed, the ton bag is convenient to stack, and the water content and the oil content are less than 20%;
s223, liquid phase separated by the multifunctional centrifuge (5) enters a first-level cache tank (4), is pumped into an intelligent high-speed variable frequency centrifuge (6) through a liquid supply pump (2) designed on the first-level cache tank (4) for second solid-liquid separation, enters a second-level cache tank (11), and is pumped into an online flocculation device (8) again through a transfer pump (12) designed on the second-level cache tank (11);
s224, adding a flocculating agent into the online flocculating device (8) through the dosing device (14), enabling the liquid phase online flocculating device (8) to fully react with the flocculating agent and then enter the intelligent high-speed variable-frequency centrifugal machine (6) again, performing third-time high-speed separation, enabling clear liquid to enter the third-level cache tank (9), enabling clear liquid in the third-level cache tank (9) to meet the secondary slurry preparation standard, and pumping the clear liquid to a slurry preparation system through an external delivery pump (10) designed on the third-level cache tank (9) to complete the whole treatment process and realize cyclic utilization of the drilling fluid.
7. The method of claim 2, wherein the waste drilling fluid after drilling is treated by two methods: adjusting the performance of the drilling fluid and directly recycling the drilling fluid, and recycling the recovered clear liquid for slurry preparation and recycling.
8. The method of claim 7, wherein the method for treating water-based drill cuttings and adjusting the properties of drilling fluid for direct reuse comprises the following steps:
s311, transferring the waste drilling fluid after well drilling and completion to a first-level buffer tank (4) through a solid control system transfer pump;
s312, pumping the drilling fluid into an intelligent high-speed variable-frequency centrifuge (6) through a fluid supply pump (2) designed on a first-level cache tank (4) to perform first solid-liquid separation on the drilling fluid, feeding the separated liquid phase into a second-level cache tank (11), and pumping the drilling fluid into the intelligent high-speed variable-frequency centrifuge (6) again through a transfer pump (12) designed on the second-level cache tank (11) to perform second high-speed separation;
and S313, enabling the qualified drilling liquid phase to enter a third-level buffer tank (9), pumping the drilling liquid into a tank car through an external delivery pump (10) arranged on the third-level buffer tank (9), and transferring the drilling liquid to the next well to realize the cyclic utilization of the drilling liquid.
9. The method of claim 7, wherein the method of treating water-based drill cuttings and waste drilling fluid comprises the steps of:
s321, transferring the waste drilling fluid after well drilling and completion to a first-level buffer tank (4) through a solid control system transfer pump;
s322, pumping the drilling fluid into an intelligent high-speed variable-frequency centrifuge (6) through a fluid supply pump (2) designed on a first-level cache tank (4) to perform first solid-liquid separation on the drilling fluid, feeding the separated liquid phase into a second-level cache tank (11), and pumping the drilling fluid into an online flocculation device (8) again through a transfer pump (12) designed on the second-level cache tank (11);
and S323, adding a flocculating agent into the online flocculating device (8) through the dosing device (14) while combining the second step, fully reacting the liquid phase online flocculating device (8) with the flocculating agent, and then feeding the liquid phase online flocculating device into the intelligent high-speed frequency conversion centrifugal machine (6) again for secondary high-speed separation.
And S324, when the clear liquid enters the third-level buffer tank (9), the clear liquid in the third-level buffer tank (9) meets the slurry preparation standard again, the clear liquid passes through an external delivery pump (10) designed on the third-level buffer tank (9), the clear liquid is pumped into a tank preparation vehicle and is transferred to the next well or a slurry station, the whole treatment process is completed, and the cyclic utilization of the drilling fluid is realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211151468.1A CN115478797A (en) | 2022-09-21 | 2022-09-21 | Harmless treatment device and method for drill cuttings and waste drilling fluid |
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| CN202211151468.1A CN115478797A (en) | 2022-09-21 | 2022-09-21 | Harmless treatment device and method for drill cuttings and waste drilling fluid |
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