CN101812979A - Countercurrent washing deoiling treatment method for oil-contained drilling cuttings - Google Patents
Countercurrent washing deoiling treatment method for oil-contained drilling cuttings Download PDFInfo
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- CN101812979A CN101812979A CN 201010161318 CN201010161318A CN101812979A CN 101812979 A CN101812979 A CN 101812979A CN 201010161318 CN201010161318 CN 201010161318 CN 201010161318 A CN201010161318 A CN 201010161318A CN 101812979 A CN101812979 A CN 101812979A
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Abstract
The invention discloses a countercurrent washing deoiling treatment method for oil-contained drilling cuttings, comprising the following steps of: adding a first detergent solvent to a solvent pot; sieving the oil-contained drilling cuttings through a vibration sieve to convey oversize materials to the first washing process by a screw conveyer; mixing and washing the oversize materials of the oil-contained drilling cuttings and a second detergent solvent in a first-level washer, and continuously flowing out the mixture to directly enter a first-level centrifuger to separate the drilling cuttings from oil; conveying the drill cuttings discharged from a solid-phase discharge outlet of the first-level centrifuger to the second washing process and conveying liquid phase discharged from a liquid-phase discharge outlet to a rectifying tower; conveying the drill cuttings discharged from the solid-phase discharge outlet of a second-level centrifuger to the third washing process and taking the liquid phase discharged from the liquid-phase discharge outlet as the second detergent solvent to enter the first-level washing process at the same time, and the like. Compared with the prior art, the oil-contained drill cuttings are washed for three times, and the movement direction of the drill cuttings is opposite to the movement direction of the solvent, thereby the solvent efficiency and the washing effect are improved.
Description
Technical field
The present invention relates to a kind of deoiling treatment method, relate in particular to countercurrent washing deoiling treatment method for oil-contained drilling cuttings.
Background technology
In the oil and gas prospect development process, in operation process such as deep-well, horizontal well, bad ground, use oil-base mud to replace water-base mud to carry out drillng operation and have many superiority.But the use meeting of oil-base mud produces a large amount of drilling cuttings that contains base oil at drilling process and brings many environmental problems, must effectively handle and satisfy laws and regulations and social desirability.
In the drilling wastes management process, we can select the multiple technologies scheme according to operating environment.Burning, pyrolysis absorption, curing and stabilization technology, biodegradation technique, re-injection technology etc., still, these technology have a common shortcoming can not effectively reclaim base oil in the drilling cuttings.In waste management " 4R " principle that we follow, circulation and reutilization technology scheme are paid the utmost attention to and are selected.In the treatment and disposal drilling cuttings, reclaim and recycling wherein base oil is the key character of our this technology.
Although the solid control system of front end improves constantly solid-liquid separation efficiency, but the viscosity of oil-base mud is big, and adhesiveness is strong, the drilling cuttings fine size, so be difficult to remove with the method for machinery, the oil content of oil-contained drilling cuttings generally about 15-30%, can't reach the requirement of discharging or control discharging.Simultaneously, base oil costs an arm and a leg, and it is effectively reclaimed can produce very high economic benefit, reduces the loss and operating cost.
Effective countercurrent washing deoiling treatment method for oil-contained drilling cuttings is not also arranged at present.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, provide a kind of and can guarantee the drilling cuttings qualified discharge, guarantee that simultaneously base oil effectively separates, improves the countercurrent washing deoiling treatment method for oil-contained drilling cuttings of solvent efficiency and clean result with solvent.
In order to achieve the above object, countercurrent washing deoiling treatment method for oil-contained drilling cuttings of the present invention, it comprises:
(a) in solvent tank, add once washing agent solvent;
(b) oil-contained drilling cuttings is sent into the once washing process with its oversize by conveying worm after by bolting;
(c) described once washing process comprises from one-level washer bottom injection secondary washing liquid solvent and described oil-contained drilling cuttings oversize, described oil-contained drilling cuttings oversize and secondary washing liquid solvent are after the one-level washer mixes, washs, and outflow directly enters the first-stage centrifugal machine so that drilling cuttings is separated with oil with solvent continuously;
(d) will send into the liquid phase that secondary washing process and its liquid phase outlet opening discharge from the drilling cuttings that the solid phase outlet opening of described first-stage centrifugal machine is discharged and send into rectifying column;
(e) described secondary washing process comprises that drilling cuttings and three cleaning solutions of discharging from the injection of two-stage scrubber bottom from the first-stage centrifugal machine are molten, described drilling cuttings of discharging from the first-stage centrifugal machine and three cleaning solutions are dissolved in that two-stage scrubber mixes, after the washing, outflow directly enters the secondary centrifuge so that drilling cuttings is separated with oil with solvent continuously; The liquid phase that the drilling cuttings that described secondary centrifuge solid phase outlet opening is discharged enters three grades of washing process while liquid phase outlet openings enters the one-level washing process as described secondary washing liquid solvent;
(f) described three grades of washing process comprise and inject the drilling cuttings of discharging from the secondary centrifuge from three grades of washers bottom and from the once washing liquid solvent of solvent tank, described drilling cuttings of discharging from the secondary centrifuge and mixes, wash at three grades of washers from the once washing liquid solvent of solvent tank after, continuous outflow directly enters three grades of centrifuges so that drilling cuttings is separated with oil with solvent; The drilling cuttings that described three grades of centrifuge solid phase outlet openings are discharged enters the liquid phase of drying unit and its liquid phase outlet opening as being that three cleaning solution solvents enter described secondary washing process, and the solid phase of discharging after described drying unit drying is sent into described solvent tank as once washing liquid solvent for the gas phase that the cleaning drilling cuttings will produce simultaneously through cooling within it;
(g) described liquid phase of discharging from first-stage centrifugal machine liquid phase outlet opening is the mixed liquor of solvent and base oil, described mixed liquor is sent into rectifying column, the light fraction liquid phase that separate to produce through rectifying imports described solvent tank and recycles as once washing liquid solvent, and heavier cut is that base oil reclaims to store and is used for new drilling fluid preparation.
The inventive method is compared with the prior art: oil-contained drilling cuttings divides three washings in this device, and the direction of motion of drilling cuttings is opposite with the direction of motion of solvent, has improved the effect of solvent efficiency and washing greatly.
Description of drawings
Fig. 1 is the system schematic of countercurrent washing deoiling treatment method for oil-contained drilling cuttings of the present invention;
Fig. 2 is the structural representation of the pulse tube that adopts in the processing method shown in Figure 1.
The specific embodiment
Describe the present invention below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, oil-containing drilling-cutting countercurrent washing deoiling of the present invention is handled the device that adopts and is comprised: (a) one-level, secondary and three grades of washers 4,7,9, every grade of washer all is to adopt to comprise that a bottom is provided with the washer that drilling cuttings and colvent inlet and top are provided with the cleaning solution outlet, one-level, secondary, three grades of washers 4,7,9 cleaning solution outlet is connected with first-stage centrifugal machine 5 respectively, secondary centrifuge 8, three grades of centrifuges 10, the drilling cuttings inlet of one-level washer 4 links to each other with one-level conveying device 3, one-level, secondary and three grades of centrifuges 5,8, secondary is passed through in 9 solid phase outlet respectively, three grades and level Four conveying device 12,13,14 and secondary, three grades of washers 7, the inlet of 9 and dryers 11 links to each other, one-level, secondary and three grades of washers 4,7,9 colvent inlet is respectively by being equipped with one-level on it, secondary, three grades of solvent pumps 15,16,17 pipeline and secondary, three grades of centrifuges 8,10 the liquid phase outlet and the outlet of solvent tank 1 link to each other, and the gaseous phase outlet of dryer 11 links to each other with the inlet of solvent tank 1 by second heat exchanger 19; (b) rectifying column 6, rectifying column 6 tops are connected with condenser 24, condenser 24 links to each other with return tank 21 by the 3rd heat exchanger 20, rectifying column 6 bottoms are connected with reboiler 22, the tower top outlet of rectifying column 6 links to each other with the inlet of solvent tank 1 by condenser 24, the liquid phase outlet of first-stage centrifugal machine 5 links to each other with first heat exchanger 18 by the material pipeline, the outlet of first heat exchanger 18 links to each other with the feeding mouth of rectifying column 6, and the tower bottom outlet of reboiler 22 links to each other with base oil heat exchanger 23 by flowline.
According to said structure, countercurrent washing deoiling treatment method for oil-contained drilling cuttings of the present invention specifically comprises the steps:
(a) in solvent tank 1, add once washing agent solvent;
(b) oil-contained drilling cuttings is sent into the once washing process with its oversize by conveying worm 3 after by vibrosieve 2 screening;
(c) the once washing process comprises from one-level washer 4 bottoms injection secondary washing liquid solvent and above-mentioned oil-contained drilling cuttings oversize, oil-contained drilling cuttings oversize and secondary washing liquid solvent are after one-level washer 4 mixes, washs, and outflow directly enters first-stage centrifugal machine 5 so that drilling cuttings is separated with oil with solvent continuously;
(d) will send into the liquid phase that secondary washing process and its liquid phase outlet opening discharge from the drilling cuttings that the solid phase outlet opening of first-stage centrifugal machine 5 is discharged and send into rectifying column 6;
(e) the secondary washing process comprises that 5 drilling cuttings and three cleaning solutions of discharging are molten from the injection of two-stage scrubber 7 bottoms from the first-stage centrifugal machine, the drilling cuttings of discharging from first-stage centrifugal machine 5 and three cleaning solutions are dissolved in that two-stage scrubber 7 mixes, after the washing, outflow directly enters secondary centrifuge 8 so that drilling cuttings is separated with oil with solvent continuously; The liquid phase that the drilling cuttings that secondary centrifuge 8 solid phase outlet openings are discharged enters three grades of washing process while liquid phase outlet openings enters the one-level washing process as secondary washing liquid solvent;
(f) three grades of washing process comprise and inject the drilling cuttings of discharging from secondary centrifuge 8 from three grades of washer 9 bottoms and from the once washing liquid solvent of solvent tank 1, the drilling cuttings of discharging from secondary centrifuge 8 and from the once washing liquid solvent of solvent tank 1 mix at three grades of washers 9, after the washing, outflow directly enters three grades of centrifuges 10 so that drilling cuttings is separated with oil with solvent continuously; The liquid phase that the drilling cuttings that three grades of centrifuge 10 solid phase outlet openings are discharged enters the liquid phase outlet opening of drying unit 11 and three grades of centrifuges 10 enters the secondary washing process as three cleaning solution solvents, and the solid phase that discharge 11 dry backs, drying unit is sent into solvent tank 1 as once washing liquid solvent for the gas phase that the cleaning drilling cuttings will produce simultaneously through cooling within it;
(g) liquid phase of discharging from first-stage centrifugal machine 5 liquid phase outlet openings is the mixed liquor of solvent and base oil, mixed liquor is sent into rectifying column 6, process rectifying separates the light fraction liquid phase remittance solvent tank 1 that produces and recycles as once washing liquid solvent, and heavier cut is that base oil recovery storage is used for new drilling fluid preparation.
As shown in Figure 2, above-mentioned one-level washer 4, two-stage scrubber 7 and three grades of washers 9 adopt the pulse tube washer, and this pulse tube washer includes cleaning mixture outlet a1, contains drilling cuttings entry to mixed solution a2 and cleaning solution inlet a3.The pulse tube washer comprises a plurality of reducer pipes that connect successively, and pipe in the middle of each reducer pipe comprises is connected with a Taper Pipe and diameter pipe less than middle pipe respectively in turn at the two ends of middle pipe.Pulse tube washer characteristics are that the expansion that need not stir the tube road is finished with contraction and mixed and washing process.
In the present invention, first-stage centrifugal machine 5, secondary centrifuge 8 and three grades of centrifuges 10 adopt horizontal type screw settling centrifuge.Drying unit 11 adopts two spiral shell groomed oar formula continuous dryers.The once washing agent solvent that adds in the solvent tank 1 is solvent naphtha, benzinum, ethyl acetate, butyl acetate, acetic acid at least a in ester, the n-hexane.
By adopting above-mentioned three stage countercurrent carrying out washing treatment, can significantly save solvent internal circulating load and consumption, and then the solvent recovery energy consumption of the system of saving.Also significantly improve simultaneously clearance rate and clean result.Experimental result shows that the countercurrent washing system saves solvent about 40%, and system energy consumption reduces 30%, and the oil content of washing back drilling cuttings eases down to about 0.8%, reaches national relevant emission standards.
Claims (5)
1. countercurrent washing deoiling treatment method for oil-contained drilling cuttings is characterized in that, may further comprise the steps:
(a) in solvent tank, add once washing agent solvent;
(b) oil-contained drilling cuttings is sent into the once washing process with its oversize by conveying worm after by bolting;
(c) described once washing process comprises from one-level washer bottom injection secondary washing liquid solvent and described oil-contained drilling cuttings oversize, described oil-contained drilling cuttings oversize and secondary washing liquid solvent are after the one-level washer mixes, washs, and outflow directly enters the first-stage centrifugal machine so that drilling cuttings is separated with oil with solvent continuously;
(d) will send into the liquid phase that secondary washing process and its liquid phase outlet opening discharge from the drilling cuttings that the solid phase outlet opening of described first-stage centrifugal machine is discharged and send into rectifying column;
(e) described secondary washing process comprises that drilling cuttings and three cleaning solutions of discharging from the injection of two-stage scrubber bottom from the first-stage centrifugal machine are molten, described drilling cuttings of discharging from the first-stage centrifugal machine and three cleaning solutions are dissolved in that two-stage scrubber mixes, after the washing, outflow directly enters the secondary centrifuge so that drilling cuttings is separated with oil with solvent continuously; The liquid phase that the drilling cuttings that described secondary centrifuge solid phase outlet opening is discharged enters three grades of washing process while liquid phase outlet openings enters the one-level washing process as described secondary washing liquid solvent;
(f) described three grades of washing process comprise and inject the drilling cuttings of discharging from the secondary centrifuge from three grades of washers bottom and from the once washing liquid solvent of solvent tank, described drilling cuttings of discharging from the secondary centrifuge and mixes, wash at three grades of washers from the once washing liquid solvent of solvent tank after, continuous outflow directly enters three grades of centrifuges so that drilling cuttings is separated with oil with solvent; The drilling cuttings that described three grades of centrifuge solid phase outlet openings are discharged enters the liquid phase of drying unit and its liquid phase outlet opening as being that three cleaning solution solvents enter described secondary washing process, and the solid phase of discharging after described drying unit drying is sent into described solvent tank as once washing liquid solvent for the gas phase that the cleaning drilling cuttings will produce simultaneously through cooling within it;
(g) described liquid phase of discharging from first-stage centrifugal machine liquid phase outlet opening is the mixed liquor of solvent and base oil, described mixed liquor is sent into rectifying column, the light fraction liquid phase that separate to produce through rectifying imports described solvent tank and recycles as once washing liquid solvent, and heavier cut is that base oil reclaims to store and is used for new drilling fluid preparation.
2. countercurrent washing deoiling treatment method for oil-contained drilling cuttings according to claim 1 is characterized in that: the once washing agent solvent that adds in the described solvent tank is at least a in solvent naphtha, benzinum, ethyl acetate, butyl acetate, capryl acetate, the n-hexane.
3. countercurrent washing deoiling treatment method for oil-contained drilling cuttings according to claim 1 is characterized in that: described drying unit is two spiral shell groomed oar formula continuous dryers.
4. countercurrent washing deoiling treatment method for oil-contained drilling cuttings according to claim 1 is characterized in that: described washer is a tubular type pulse washer.
5. countercurrent washing deoiling treatment method for oil-contained drilling cuttings according to claim 1 is characterized in that: described centrifuge is a horizontal type screw settling centrifuge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010161318 CN101812979A (en) | 2010-04-28 | 2010-04-28 | Countercurrent washing deoiling treatment method for oil-contained drilling cuttings |
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| CN 201010161318 CN101812979A (en) | 2010-04-28 | 2010-04-28 | Countercurrent washing deoiling treatment method for oil-contained drilling cuttings |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012100136A2 (en) * | 2011-01-21 | 2012-07-26 | Mickler Joe D | Apparatus and method for removing and recovering oil from solids |
| CN103899262A (en) * | 2012-12-28 | 2014-07-02 | 中国石油化工股份有限公司 | Treating-while-drilling method for drilling cuttings of oil base of borehole |
| WO2015081878A1 (en) * | 2013-12-05 | 2015-06-11 | 王兵 | System for recycling all oil base mud from oil base mud well drilling waste |
| CN105735920A (en) * | 2014-12-12 | 2016-07-06 | 中石化胜利石油工程有限公司钻井工艺研究院 | Oil-based drilling fluid drilling cutting while-drilling treatment method |
| CN107030097A (en) * | 2017-06-09 | 2017-08-11 | 西南石油大学 | A kind of water-base mud drilling cuttings green processing and reuse method |
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| CN1057412A (en) * | 1990-02-28 | 1992-01-01 | 康诺科有限公司 | Clean the method and apparatus of dispersed solids particle |
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| CN1057412A (en) * | 1990-02-28 | 1992-01-01 | 康诺科有限公司 | Clean the method and apparatus of dispersed solids particle |
| US20020074269A1 (en) * | 2000-12-19 | 2002-06-20 | Hensley Gary L. | Method and system for the treatment of drilling mud |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012100136A2 (en) * | 2011-01-21 | 2012-07-26 | Mickler Joe D | Apparatus and method for removing and recovering oil from solids |
| WO2012100136A3 (en) * | 2011-01-21 | 2012-11-15 | Mickler Joe D | Apparatus for removing and recovering oil from solids |
| US9095884B2 (en) | 2011-01-21 | 2015-08-04 | Joe D. Mickler | Apparatus and method for removing and recovering oil from solids |
| US10041315B2 (en) | 2011-01-21 | 2018-08-07 | Joe D. Mickler | Apparatus and method for removing and recovering oil from solids |
| CN103899262A (en) * | 2012-12-28 | 2014-07-02 | 中国石油化工股份有限公司 | Treating-while-drilling method for drilling cuttings of oil base of borehole |
| WO2015081878A1 (en) * | 2013-12-05 | 2015-06-11 | 王兵 | System for recycling all oil base mud from oil base mud well drilling waste |
| CN105735920A (en) * | 2014-12-12 | 2016-07-06 | 中石化胜利石油工程有限公司钻井工艺研究院 | Oil-based drilling fluid drilling cutting while-drilling treatment method |
| CN107030097A (en) * | 2017-06-09 | 2017-08-11 | 西南石油大学 | A kind of water-base mud drilling cuttings green processing and reuse method |
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Application publication date: 20100825 |