CN103132935A - Staged vacuum drying treatment process and treatment device for oilfield drilling cuttings - Google Patents
Staged vacuum drying treatment process and treatment device for oilfield drilling cuttings Download PDFInfo
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- CN103132935A CN103132935A CN201310057482XA CN201310057482A CN103132935A CN 103132935 A CN103132935 A CN 103132935A CN 201310057482X A CN201310057482X A CN 201310057482XA CN 201310057482 A CN201310057482 A CN 201310057482A CN 103132935 A CN103132935 A CN 103132935A
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Abstract
The invention relates to a staged vacuum drying treatment process and a treatment device for oilfield drilling cuttings. During auxiliary heating, the inside of a dryer is pumped to reach different levels of vacuum degrees by a vacuum set, water and diesel in the oilfield drilling cuttings are sequentially vaporized by staged vacuuming, vapor is liquefied by a condenser, the water containing a small amount of oil is recovered to a water storage tank, the diesel containing a small amount of water is recovered to an oil storage tank for reserve, the drilling cuttings are discharged after dried, and a heating system is automatically started or stopped as needed. By the aid of the drying treatment process and the drying treatment device, the oil-based drilling cuttings can be dried to such a degree that the water content is lower than 0.1% and the oil content is lower than 0.3%, and the drilling cuttings can be maximally reduced and directly discharged. The treatment device can respectively recover the diesel and the water by the aid of the same condenser under a staged vacuum condition, a huge fractionating tower is omitted, and the device is compact in structure, simple and convenient to operate, high in drilling cuttings treatment efficiency, fine in environmental performance and suitable for harmless treatment of the oil-based drilling cuttings on an open sea or deep sea drilling platform.
Description
Technical field
The present invention relates to oil drilling oil-contained drilling cuttings classification vacuum drying treatment technique and implement this technique treating apparatus used; belong to the oil field environment-protection field; the drying and other treatment that can be used for oil-contained drilling cuttings or oily sludge is particularly suitable for the harmless treatment of oil base drilling cuttings on the offshore boring island of off-lying sea or deep-sea zone.
Background technology
At present, oil base drilling fluid is widely used in drilling technology, and the oil that is used as continuous phase in the water-in-oil type drilling fluid is called base oil, and the base oil that the most generally uses is diesel oil (China's No. zero diesel oil commonly used).In oil-based drilling mud, diesel oil often surpasses 50% as the concentration by volume of additive, and water is evenly dispersed in diesel oil as necessary component, and its water content is generally 10～60%.The drilling cuttings that produces during drilling well may contain and surpass 7.5% oil, oil-contained drilling cuttings directly discharges, serious environment pollution will be caused, affect the water source of drinking water, affect soil and animal and plant growth, even directly jeopardize human health and life security, so the use of a series of relevant laws and regulations restriction oil base drilling fluids and the discharging of oil-contained drilling cuttings have been formulated in countries in the world.
The oil base drilling cuttings need to carry out strict processing, can not advanced treating during offshore drilling, pass through often preliminary treatment, and then transport land back and carry out again advanced treating.Drill cutting treatment method commonly used has drier to take off dry method, hot fractionating process, re-injection method, hot water washing etc. at present.After drier takes off dry process, the comprehensive oil-containing mass fraction of drilling cuttings higher than 4.8%, can not directly discharge; The drilling cuttings crude quality mark that hot fractionating process was processed is lower than 1%, but the method equipment is complicated, operating condition is harsh, mostly is professional treatment factory and uses; Landwaste re-injection method be with drilling cuttings by grinding and sieve and add appropriate seawater and thickening agent, select the injection of suitable stratum, this technical finesse is thorough, but cost is very high, often exceeds the ability to bear of drilling team.Displacement efficiency is very high for hot water washing (also claiming the thermal desorption method), but occupation area of equipment is large, and water consumption is large, and can cause secondary pollution.
Great development along with sea oil drilling and production; the oil pollution problem of ocean also grows in intensity; the drilling cuttings pretreatment often adopts centrifuge to carry out preliminary mummification on ocean platform; screen drum and rotary drum serious wear during the operation of this kind centrigugal swing dryer; application life is short, and it is not high enough to discharge the drilling cuttings mass dryness fraction, therefore at present in the urgent need to a kind of compact conformation, oil base drill chip innocent treating apparatus easy and simple to handle; can directly arrange the sea after making disposal of cuttings, satisfy the demand of deep-sea or off-lying sea drilling well.
Summary of the invention
The present invention is mainly the deficiency for existing drill cutting treatment method, a kind of compact conformation, oil base drill chip innocent treatment process easy and simple to handle is provided and implements the treating apparatus of this treatment process.The key issue that solves is to form at a lower temperature the classification vacuum, moisture and oil product are vaporized in different phase, only just water and oil content can not liquefied with condenser, play the effect of separation, harsh high temperature fractionation process and huge fractionating column have been avoided, disposal of cuttings is thorough, and is simple to operate, good environmental protection.
Technical scheme of the present invention is achieved in that by auxiliary heating system and improves the drilling cuttings temperature, and with the vacuum unit, dryer inside is extracted into respectively the vacuum of different stage, utilize the classification vacuum that the moisture in the oil drilling drilling cuttings and diesel oil are vaporized successively, again by condenser with steam liquefied, the water that will contain respectively a small amount of oil is recovered to water tank, it is standby that the diesel oil that will contain a small amount of water is recovered to oil storage tank, effluxes after the drilling cuttings drying; System reduces the temperature that effluxes drilling cuttings by heat-obtaining, and keeps the temperature of water tank, reclaims heat.
Oil drilling drilling cuttings classification vacuum drying treatment device, it is characterized in that: comprise vacuum desiccator, heating system, temperature pick up, pressure sensor, vacuum unit, deduster, condenser, water tank, oil storage tank, heat-obtaining system, heating system comprises controller and heater, vacuum desiccator is the closed container that an inside is provided with agitator, vacuum desiccator top has temperature-measuring port, pressure tap and extraction opening, and the heat-obtaining system comprises water pump, valve and heat exchanging pipe; The heater cartridge of heating system is in vacuum desiccator, containing the liquid drilling cuttings is loaded in vacuum desiccator, the extraction opening of vacuum desiccator is connected with the deduster entrance, the deduster outlet is connected with the entrance of vacuum unit, the vacuum machine set outlet is connected with condenser, condenser is connected with oil storage tank with water tank respectively by valve, and heat-obtaining system one end is loaded in the dry device of dry vacuum, and the other end is loaded in water tank; The temperature-measuring port mounting temperature sensor of vacuum desiccator, temperature pick up is connected with the controller of heating system; The pressure tap setting pressure sensor of vacuum desiccator, pressure sensor is connected with the controller of vacuum unit.
Use the technique that described treating apparatus carries out oil drilling drilling cuttings classification vacuum drying treatment, it is characterized in that: airtight after the wet drilling bit of filling less than 2/3 volume in vacuum desiccator, heating system is opened, and the drilling cuttings temperature is higher than 0 ℃, the temperature pick up feedback signal, heating system is closed; If environment temperature is higher than 0 ℃, heating system does not start; Vacuum unit starting, the vacuum pressure in vacuum desiccator be less than 400Pa, the pressure sensor feedback signal, reduce vacuum unit flow, vacuum pressure is greater than 500Pa, the pressure sensor feedback signal, increase vacuum unit flow, keeping the vacuum desiccator internal pressure is 400～500Pa; The steam with solid impurity from the extraction of vacuum desiccator extraction opening, first remove solid impurity through deduster, enter again the vacuum unit, the steam that the vacuum machine set outlet is discharged, liquefy through the condenser pressure charging temperature reduction, when the vacuum desiccator internal pressure was 400～500Pa, the water tank inlet valve was opened, and condensate liquid enters water tank; When vacuum unit flow less than 0.1m
3During/min, the water tank inlet valve cuts out, and first order processing finishes; The oil storage tank inlet valve is opened, and beginning is processed in the second level; Heating system is opened, and in vacuum desiccator, temperature is higher than 150 ℃, and heating system is closed, and the interior temperature of vacuum desiccator 1 is lower than 100 ℃, and heating system starts, and keeping the interior temperature of vacuum desiccator is 100～150 ℃; The vacuum unit starting, the pressure sensor feedback signal, the corresponding adjusting of vacuum unit flow guarantees that vacuum pressure is 10～50Pa; The oil storage tank inlet valve is opened, and condensate liquid enters oil storage tank 10; When vacuum unit 5 flows less than 0.1m
3During/min, the vacuum unit is closed, and second level processing finishes; The heat-obtaining system opens, and in vacuum desiccator, temperature reduces, in vacuum desiccator temperature lower than 50 ℃, heat-obtaining system closing, vacuum desiccator discharging.
Vacuum desiccator is a closed container, and inside is provided with an agitator and is used for stirring drilling cuttings, prevents the drilling cuttings caking, accelerates dry run.Vacuum desiccator top has temperature-measuring port, pressure tap and extraction opening, the temperature-measuring port mounting temperature sensor, and pressure tap setting pressure sensor, extraction opening is connected with vacuum unit entrance.The heater of heating system can be steam-heating pipe, can be also microwave applicator.
The vacuum unit can be the above vacuum pump series connection of two-stage or two-stage, to reach required vacuum requirement.
Deduster can be chosen sack cleaner with removing the granule foreign that carries in steam, or with the strainer of filter core.
The heat-obtaining system comprises water pump, valve and heat exchanging pipe, and an end is packed in vacuum desiccator, and an end is packed in water tank, both reduced the temperature that effluxes drilling cuttings, reclaimed again waste heat, and reclaimed heat and be stored in water tank, the temperature that can keep water storage, and the initial temperature of raising water for heating.
Condenser adopts water at low temperature as cooling medium, the heat when condensing with recovered steam, and owing to adopting vacuum fractionation dry, oil and water share a condenser, and by opening corresponding valve, Jiang Shui and oil are stored in water tank and oil storage tank respectively.
Compared with prior art, the invention has the advantages that: the oil drilling drilling cuttings classification vacuum drying treatment technique and the treating apparatus that provide are simple to operate, apparatus structure is compact, saved huge fractionating column, disposal of cuttings efficient is high, good environmental protection, the oil base drilling cuttings can be dried to moisture content less than 0.1%, oil content is less than 0.3%, to reach drilling cuttings minimizing and the purpose that directly effluxes to greatest extent.
Coming further to illustrate in detail technological process of the present invention and treating apparatus below in conjunction with accompanying drawing consists of.
Description of drawings
Fig. 1 is oil drilling drilling cuttings classification vacuum drying treatment technique and treating apparatus schematic diagram.
Wherein 1 is vacuum desiccator, the 2nd, and heating system, the 3rd, temperature pick up, the 4th, pressure sensor, the 5th, vacuum unit, the 6th, deduster, the 7th, condenser, the 8th, oil storage tank inlet valve, the 9th, water tank inlet valve, the 10th, oil storage tank, the 11st, water tank, 12 heat-obtaining systems, the 1.1st, vacuum desiccator extraction opening, the 1.2nd, pressure tap, 1.3 be temperature-measuring port, 2.1 be heater, the 2.2nd, heating controller, the 5.1st, vacuum unit entrance, 5.2 be the vacuum machine set outlet, 5.3 be the vacuum machine group controller, the 6.1st, deduster material inlet, 6.2 deduster gas outlets.
The specific embodiment
Embodiment is as follows:
With reference to Fig. 1, temperature-measuring port 1.3 mounting temperature sensors 3 of vacuum desiccator 1, temperature pick up 3 is connected with heating controller 2.2, temperature pick up 3 signal feedback heating systems 2; The pressure tap 1.2 setting pressure sensors 4 of vacuum desiccator 1, pressure sensor 4 is connected with vacuum machine group controller 5.3, pressure sensor 4 signal feedback vacuum units 5; The heater 2.1 of heating system 2 is loaded in vacuum desiccator 1, vacuum desiccator extraction opening 1.1 is connected with the deduster material inlet 6.1 of deduster 6, deduster gas outlet 6.2 is connected with vacuum unit entrance 5.1, vacuum machine set outlet 5.2 is connected with condenser 7, condenser 7 is connected with the water tank inlet valve to be connected with water tank with oil storage tank 10 respectively by oil storage tank inlet valve 8 and is connected, heat-obtaining system 12 1 ends are loaded in vacuum desiccator 1, and the other end is loaded in water tank 11.
This embodiment is for the wet drilling bit that contains water and diesel oil, the main component of diesel oil is that C16 is to n-alkane, monocyclic naphthenes and the mononuclear aromatics of C20, the saturated vapour pressure of 60 ℃ of lower n-eicosanes is less than 0.1Pa, the hexadecane saturated vapor pressure is about 7Pa, saturated vapour pressure under 100 ℃ of n-eicosanes is less than 19Pa, the saturated vapour pressure of n-eicosane under 150 ℃ is 100Pa, and 0 ℃ of lower water saturation vapour pressure is greater than 600Pa.
Airtight after the wet drilling bit of the interior filling of vacuum desiccator 1 less than 2/3 volume, heating system 2 is opened, and the drilling cuttings temperature is higher than 0 ℃, temperature pick up 3 feedback signals, and heating system 2 is closed; If environment temperature is higher than 0 ℃, heating system 2 does not start.Vacuum unit 5 starts, and the vacuum pressure in vacuum desiccator 1 is 400Pa, pressure sensor 4 feedback signals, reduce vacuum unit 5 flows, vacuum pressure is greater than 500Pa, pressure sensor 4 feedback signals, increase vacuum unit 5 flows, keeping vacuum desiccator 1 internal pressure is 400～500Pa.The steam with solid impurity from 1.1 extractions of vacuum desiccator extraction opening, first remove solid impurity through deduster 6, enter again vacuum unit 5, the steam that vacuum machine set outlet 5.2 is discharged, liquefy through condenser 7 pressure charging temperature reductions, when vacuum desiccator 1 internal pressure was 400～500Pa, water tank inlet valve 9 was opened, and condensate liquid enters water tank 11.When vacuum unit 5 flows less than 0.1m
3During/min, water tank inlet valve 9 cuts out, and first order processing finishes.Oil storage tank inlet valve 8 is opened, and beginning is processed in the second level.Heating system 2 is opened, and the interior temperature of vacuum desiccator 1 is higher than 150 ℃, and heating system 2 is closed, and the interior temperature of vacuum desiccator 1 is lower than 100 ℃, and heating system 2 starts, and keeping the interior temperature of vacuum desiccator 1 is 100～150 ℃.Vacuum unit 5 starts, pressure sensor 4 feedback signals, and the 5 corresponding adjustings of flow of vacuum unit guarantee that vacuum pressure is 10～50Pa.Oil storage tank inlet valve 8 is opened, and condensate liquid enters oil storage tank 10.When vacuum unit 5 flows less than 0.1m
3During/min, vacuum unit 5 is closed, and second level processing finishes.Heat-obtaining system 12 opens, and the interior temperature of vacuum desiccator 1 reduces, and the interior temperature of vacuum desiccator 1 is lower than 50 ℃, and heat-obtaining system 12 closes, vacuum desiccator 1 discharging.A plurality of work periods are carried out in so intermittently operated, and the disposal of cuttings amount is greater than 10m
3/ h satisfies the online requirement of processing of drilling cuttings fully.
The above is the embodiment commonly used of this invention, and according to the difference of material handling character, any those skilled in the art can set different operating temperatures and operation vacuum level according to the technology contents of above-mentioned announcement, realize other embodiment of equivalence.
Claims (3)
1. oil drilling drilling cuttings classification vacuum drying treatment device, it is characterized in that: comprise vacuum desiccator, heating system, temperature pick up, pressure sensor, vacuum unit, deduster, condenser, water tank, oil storage tank, heat-obtaining system, heating system comprises controller and heater, vacuum desiccator is the closed container that an inside is provided with agitator, vacuum desiccator top has temperature-measuring port, pressure tap and extraction opening, and the heat-obtaining system comprises water pump, valve and heat exchanging pipe;
The heater cartridge of heating system is in vacuum desiccator, containing the liquid drilling cuttings is loaded in vacuum desiccator, the extraction opening of vacuum desiccator is connected with the deduster entrance, the deduster outlet is connected with the entrance of vacuum unit, the vacuum machine set outlet is connected with condenser, condenser is connected with oil storage tank with water tank respectively by valve, and heat-obtaining system one end is loaded in the dry device of dry vacuum, and the other end is loaded in water tank; The temperature-measuring port mounting temperature sensor of vacuum desiccator, temperature pick up is connected with the controller of heating system; The pressure tap setting pressure sensor of vacuum desiccator, pressure sensor is connected with the controller of vacuum unit.
2. treating apparatus as claimed in claim 1, it is characterized in that: the heater of described heating system is steam-heating pipe or microwave applicator.
3. use the technique that treating apparatus as claimed in claim 1 carries out oil drilling drilling cuttings classification vacuum drying treatment, it is characterized in that:
Airtight after the wet drilling bit of filling less than 2/3 volume in vacuum desiccator, heating system is opened, and the drilling cuttings temperature is higher than 0 ℃, the temperature pick up feedback signal, and heating system is closed; If environment temperature is higher than 0 ℃, heating system does not start;
Vacuum unit starting, the vacuum pressure in vacuum desiccator be less than 400Pa, the pressure sensor feedback signal, reduce vacuum unit flow, vacuum pressure is greater than 500Pa, the pressure sensor feedback signal, increase vacuum unit flow, keeping the vacuum desiccator internal pressure is 400～500Pa; The steam with solid impurity from the extraction of vacuum desiccator extraction opening, first remove solid impurity through deduster, enter again the vacuum unit, the steam that the vacuum machine set outlet is discharged, liquefy through the condenser pressure charging temperature reduction, when the vacuum desiccator internal pressure was 400～500Pa, the water tank inlet valve was opened, and condensate liquid enters water tank; When vacuum unit flow less than 0.1m
3During/min, the water tank inlet valve cuts out, and first order processing finishes;
The oil storage tank inlet valve is opened, and beginning is processed in the second level; Heating system is opened, and in vacuum desiccator, temperature is higher than 150 ℃, and heating system is closed, and the interior temperature of vacuum desiccator 1 is lower than 100 ℃, and heating system starts, and keeping the interior temperature of vacuum desiccator is 100～150 ℃; The vacuum unit starting, the pressure sensor feedback signal, the corresponding adjusting of vacuum unit flow guarantees that vacuum pressure is 10～50Pa; The oil storage tank inlet valve is opened, and condensate liquid enters oil storage tank 10; When vacuum unit 5 flows less than 0.1m
3During/min, the vacuum unit is closed, and second level processing finishes; The heat-obtaining system opens, and in vacuum desiccator, temperature reduces, in vacuum desiccator temperature lower than 50 ℃, heat-obtaining system closing, vacuum desiccator discharging.
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Cited By (5)
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| WO2014171839A1 (en) * | 2013-04-19 | 2014-10-23 | Trond Melhus | Method and system for separation of oil and water from drilling mud |
| CN106219938A (en) * | 2016-08-24 | 2016-12-14 | 李天舒 | A kind of greasy filth or the processing method of mud |
| CN110201984A (en) * | 2019-06-24 | 2019-09-06 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of oil-containing article microwave goes oil recovery apparatus and its application method |
| CN111577176A (en) * | 2020-06-08 | 2020-08-25 | 浙江铂沣环保科技有限公司 | Offshore oil and gas platform oil-based drilling fluid drilling cuttings while-drilling treatment system |
| CN113404451A (en) * | 2021-02-04 | 2021-09-17 | 中国石油大学(北京) | Method for rock debris reinjection layer selection based on logging information |
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| CN111577176A (en) * | 2020-06-08 | 2020-08-25 | 浙江铂沣环保科技有限公司 | Offshore oil and gas platform oil-based drilling fluid drilling cuttings while-drilling treatment system |
| CN113404451A (en) * | 2021-02-04 | 2021-09-17 | 中国石油大学(北京) | Method for rock debris reinjection layer selection based on logging information |
| CN113404451B (en) * | 2021-02-04 | 2022-08-02 | 中国石油大学(北京) | Method for rock debris reinjection layer selection based on logging information |
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