CN104420844B - The solid-liquid separating method that a kind of circulating fluid does not land - Google Patents

The solid-liquid separating method that a kind of circulating fluid does not land Download PDF

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Publication number
CN104420844B
CN104420844B CN201310367640.1A CN201310367640A CN104420844B CN 104420844 B CN104420844 B CN 104420844B CN 201310367640 A CN201310367640 A CN 201310367640A CN 104420844 B CN104420844 B CN 104420844B
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solid
liquid
drilling
drilling fluid
weight
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CN104420844A (en
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韩阳
杨小平
黄禾
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DEHUI TONGLI (BEIJING) PETROLEUM TECHNOLOGY SERVICE Co Ltd
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DEHUI TONGLI (BEIJING) PETROLEUM TECHNOLOGY SERVICE Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06Arrangements for treating drilling fluids outside the borehole
    • E21B21/063Arrangements for treating drilling fluids outside the borehole by separating components
    • E21B21/065Separating solids from drilling fluids
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/02Well-drilling compositions
    • C09K8/04Aqueous well-drilling compositions
    • C09K8/06Clay-free compositions
    • C09K8/12Clay-free compositions containing synthetic organic macromolecular compounds or their precursors

Abstract

The solid-liquid separating method that design cycle drilling fluid of the present invention does not land, by using shielding drilling fluid is inlayed, circulating drilling liquid energy is easily separated by mechanical means, and liquid phase reclaims circulation and inlays shielding drilling fluid for preparation, solid phase is recycled, and really realizes that drilling fluid does not land target.

Description

The solid-liquid separating method that a kind of circulating fluid does not land
Technical field
The present invention relates to the technology that a kind of oil-gas field downhole operation output solution does not land present process level comprehensive utilization, The solid-liquid separating method that more particularly to a kind of circulating fluid does not land.
Background technology
During drilling fluid is drilling process, the circulation flushing medium used in hole is referred to as the blood of drilling well, is drilling engineering In extremely important part, its basic function have carrying and suspension landwaste, stabilizing borehole and balance pressure, cooling and lubricating bore Tool.One of Main Function of drilling fluid is that landwaste is carried to ground from shaft bottom, and the drilling fluid from shaft bottom is common with discarded object Composition multiphase stable suspension, wherein containing many environmentally harmful materials, such as oils, chemical addition agent, heavy metal (such as Mercury, copper, chromium, cadmium, zinc and lead etc.), macromolecular organic compound, alkaline matter etc..Therefore, drilling fluid discarded object is natural oil One of primary pollution source of gas industry, its treatment is also a great problem for perplexing oil field at present.2008《National Hazard waste name Record》In by " waste drilling fluids disposal produce sludge "(Waste code 071-002-08)List National Hazard waste item in Interior, the method Tianjin regulation with country increasingly perfects, the enhancing that the raising of local government's environmental requirement and oil field environment-protection are realized, drilling well The development that liquid does not land technical method is imperative.
At present, domestic and international drilling fluid Waste Disposal Technology mainly has:Simple process discharge, reinjection into reservoir, strange land are concentrated Treatment, backfill, hole interior sealing, soil cultivating, solidification, solid- liquid separation, burning, microbiological treatment etc..But these processing methods are general Store-through can not be satisfactory to both parties in economic benefit and environmental benefit problem:The good method of environmental benefit, financial cost is too high;Financial cost Low, often do not reach environmental requirement.Such as reinjection into reservoir, the method for soil tilth, although can simultaneously meet economy double with environment Weight benefit, but limitation is big, it is impossible to penetration and promotion;Solidification method floor space is big, and processing cost is high, and environmental risk is still larger. Additionally, above-mentioned each method there are different requirements to the drilling fluid discarded object being processed, it is not particularly suited for all of drilling fluid and discards Thing treatment.
It is reported that being related to the report of the solid-liquid separating method that drilling fluid does not land, replace digging ground mud using slurry tank Stock tank carries out the collection and circulation of drilling fluid discarded object, can realize that drilling fluid is discarded with treatment immediately is bored, in the absence of externally discharged waste water Thing does not land circular treatment, has been inherently eliminated pollution of the drilling fluid discarded object to environment, and drilling fluid discarded object is recovered Treatment can be reused, and it is " Whole Process Control " that this technology becomes " end treatment ".
At present, widely used drilling fluid is the additive such as additional thinner, fluid loss additive with bentonite as matrix.Cause This, current drilling fluid discarded object does not land the discarded object that treatment research is typically to be produced for such drilling fluid, such discarded Thing including weighting material, chemical treatments, sewage, sump oil and drilling cuttings etc., simultaneously as bentonite has in low shear rate Structural viscosity higher, therefore when treatment is not landed to such drilling fluid discarded object, clear water washing, chemistry wadding need to be set It is solidifying, or even the step such as ultrafiltration, counter-infiltration is reaching safety dumping standard, such as Chinese patent CN101690937A, Chinese patent Described in CN101279811A, Chinese patent CN101319607A etc..What is introduced in above-mentioned processing procedure makes drilling fluid Discarded object is de- steady, flocculation, other separate chemical assistants, or for cleaning a large amount of water of solid, these are virtually increasing Added the consumption of resource, while increase new waste pollution, therefore the above method be drilling fluid discarded object transfer and non-real Recycling in positive meaning.Additionally, ultrafiltration described in above-mentioned patent document or reverse-osmosis treated purification preliminary purification Waste liquid, the method for obtaining meeting the waste water of discharge standard needs additional filtration device and reverse osmosis unit, these devices and filter core Replacing not only greatly increased financial cost, and a large amount of space resources of these hold facilities, meanwhile, discarded filter core also can Secondary pollution is caused to environment.
The content of the invention
In order to overcome above mentioned problem, the present invention to provide a kind of based on the circulating fluid separation of solid and liquid for inlaying shielding drilling fluid Method.
The present inventor obtains a kind of support and bentonitic inlays shielding drilling fluid by studying with keen determination.The drilling fluid is Without clay water-base drilling fluid, it includes inlaying screener, tackifier, heavy weight additive and basal liquid a kind of advanced high-performance, wherein, It is that inside is rigid inorganic kernel, such as quartz sand, such as acrylamide hydrophilic elastic shielding of outside cladding to inlay screener The granuloplastic network gel of film, appearance and size reaches 40~400 μm, by electrostatic force and drag, in drilling cuttings surface hair Raw multiple spot absorption, forms barrier film, has elastic variable and the spy with diameter greater than reservoir pore space diameter due to inlaying screener Point, in the presence of pressure difference, inlays screener particle part inlay and enters at pore entrance, and hole is blocked, and remainder is still Outside hole, play a part of unidirectional closure.Wherein, tackifier are phenolic resin class organic high molecular polymer;Heavy weight additive It is solubility salt, including inorganic salts and organic salt;Basal liquid is fresh water, local area backflow sewage, salt solution or seawater, above-mentioned each group Divide and do not result in environmental pollution, and using liquid phase part in recovery circulating fluid, really realize circulating fluid not Landing is recycled.
Inlayed during drilling well screener, tackifier, heavy weight additive and basal liquid etc. can with circulating fluid together by Band is back to pit shaft, can be reused after simple process.
By using shielding drilling fluid is inlayed, circulating drilling liquid energy is easily separated by mechanical means, and solid phase reclaims profit With liquid phase reclaims circulation and inlays shielding drilling fluid for preparation, really realizes that drilling fluid does not land target.
It is to inlay the excellent of shielding drilling fluid based on above-mentioned that the circulating fluid that the present invention is provided does not land solid-liquid separating method Good characteristic, the screener of inlaying for being used pollutes drilling fluid system oil resistant, salt and remains that excellent performance is to ensure this The key that invention is smoothly implemented.
It is an object of the invention to provide following technical scheme:
(1)A kind of solid-liquid separating method that circulating fluid does not land, circulating fluid used refers to by using following The drilling fluid containing drilling wastes that shielding drilling fluid drilling well is obtained is inlayed, the shielding drilling fluid of inlaying includes following weight The component of content:
Screener 0.2%-8.5% is inlayed,
Tackifier 0-5%,
Heavy weight additive 0-8%
Balance of basal liquid,
Wherein, the weight content refers to the percentage by weight that the component is based on inlaying shielding drilling fluid gross weight;
The basal liquid is fresh water, local area backflow sewage, salt solution or seawater;
The screener of inlaying is prepared by the following method:
By 100 parts by weight rigid inorganic kernels, 500-2600 weight parts monomers, 50-300 weight portions initiator and 30- 300 parts per weight dispersing agents etc. are added to the water, and are warming up to 60 DEG C -90 DEG C, and long-chain polymer is formed after the completion of reaction, and drying is obtained Inlay screener,
Wherein,
The rigid inorganic kernel is selected from quartz sand or silicate mineral,
The monomer is acrylamide,
The initiator is selected from:Acyl class peroxide such as benzoyl peroxide, lauroyl peroxide etc., or esters peroxide Compound such as peroxidized t-butyl perbenzoate, peroxidating trimethylacetic acid tertiary butyl ester;
The dispersant is selected from triethyl group hexyl phosphoric acid, lauryl sodium sulfate, methyl anyl alcohol or guar gum etc.,
The heavy weight additive is solubility salt, including inorganic salts and organic salt, preferably NH4Cl、KCl、KHCO3、NaCl、 MgCl2、CaCl2、ZnCl2、ZnBr2Deng more preferably NH4Cl、KCl、KHCO3
The tackifier are phenolic resin class organic high molecular polymer;
The method is comprised the following steps:
A. circulating fluid realizes that solid-liquid once divides through principal oscillation sieve removing as the bulky grain drilling cuttings of greater particle size solid phase From, greater particle size solid phase is collected, the liquid phase after first separation imports desander;
B. the liquid phase after first separation is realized inlaying shielding in drilling cuttings gel adsorption body through the hydrocyclone in desander The desorption of agent and drilling cuttings and solid-liquid secondary separation, reclaim upper aqueous phase, adjust the liquid outlet valve of the hydrocyclone bottom of to It is umbrella stream to flow, from sand device bottom go out to discharge secondary separation after be solid to desander in desanding vibratory sieve;
C. the solid phase after secondary separation is smaller solid through the desanding vibratory sieve removing particle diameter in desander under the effect of umbrella stream Mutually simultaneously collection cut size is smaller, and reclaim liquid phase enters circulating line, realizes three separation of solid-liquid.
(2)According to as above(1)Described in the solid-liquid separating method that does not land of circulating fluid, it is characterised in that it is described Inlaying shielding drilling fluid includes that weight content inlays screener for 2%-5%, and the weight content refers to inlay screener to be based on Inlay the percentage by weight of shielding drilling fluid gross weight.
(3)According to as above(1)Described in the solid-liquid separating method that does not land of circulating fluid, it is characterised in that it is described Inlaying shielding drilling fluid includes that weight content is the tackifier of 0-5%, and the weight content refers to that tackifier are bored based on shielding is inlayed The percentage by weight of well liquid gross weight.
(4)According to as above(1)Described in the solid-liquid separating method that does not land of circulating fluid, it is characterised in that it is described Inlaying shielding drilling fluid includes that weight content is the heavy weight additive of 1%-8%, and the weight content refers to that heavy weight additive is based on inlaying shielding The percentage by weight of drilling fluid gross weight.
(5)According to as above(1)Described in the solid-liquid separating method that does not land of circulating fluid, it is characterised in that it is described Circulating fluid also includes one or more other auxiliary agent, and the auxiliary agent can be lubricant, and the lubricant can be solid Lubricant or fluid lubricant.
(6)According to as above(1)Described in the solid-liquid separating method that does not land of circulating fluid, it is characterised in that it is described Screener particle diameter distribution is inlayed for 4~400 μm, and preferably average grain diameter is at 50 μm or so.
(7)According to as above(1)Described in the solid-liquid separating method that does not land of circulating fluid, it is characterised in that it is described Principal oscillation sieve wire screen mesh number is 30-40 mesh.
(8)According to as above(1)Described in the solid-liquid separating method that does not land of circulating fluid, it is characterised in that it is described Desanding vibratory sieve wire screen mesh number is 250-300 mesh.
(9)According to as above(1)Described in the solid-liquid separating method that does not land of circulating fluid, it is characterised in that will walk The liquid phase isolated in rapid B and step C is concentrated to backflash, is recycled to drilling fluid canal, and shielding drilling well is inlayed for preparing again Liquid.
The all of sewage in well site:Including cleaning equipment discharge sewage, oil-polluted water, earth's surface saline sewage all it is recyclable simultaneously Shielding drilling fluid is inlayed for preparing.
Each link more than, completes the present invention.
Specifically,
Solid-liquid separating method is not landed according to a kind of circulating fluid that the present invention is provided, with advantages below:
1. environmental benefit
(1)Not running pulp, not plasma discharge, waste water all reclaims preparation and safeguards glue, including sewage, the oil-containing that cleaning equipment is discharged The recyclable recycling of sewage, earth's surface saline sewage, non-wastewater discharge does not produce new waste water;
(2)Suppress drilling cuttings aquation from source, substantially reduce the generation of pollutant, the total amount of pollutant is only Bentonite System 1/4-1/3;
(3)Based on desander, vibratory sieve only helps out solids control, it might even be possible to do not use solid-liquid separating machine, Whole solid controlling system is more succinct, low to live site requirements;
2. economic benefit
(1)The treatment of pollutant is gone with drilling, and all devices, personnel can at once put into lower a bite well after finishing drilling, not increase Time and cost of labor;
(2)Save solid controlling and environmentally friendly cost:Save Conventional mud system in dig pit, disposal of cuttings solidification, slurry transportation, give up The costs such as water, liquid waste processing, it is more obvious in the strict area benefit of environmental requirement, it is not necessary to it is extra increase sewage treatment facility and Other large scale equipments, significantly reduce equipment cost;
3. utilization benefit
(1)Circulation of drilling fluid is utilized:It is low by 30% that realization recycles rear every mouthful of well average specific conventional drilling liquid;
(2)Improve efficiency:Low solid phase improves rotating speed, while reducing accident rate, reduces the drilling well entirety time more than 30%;
(3)Reservoir protection:Improve oil-gas Layer yield.
Brief description of the drawings
The process flow diagram of the solid-liquid separating method that Fig. 1 does not land according to the preferred circulating fluid of the inventive method
Specific embodiment
Below by the present invention is described in detail, the features and advantages of the invention will become more with these explanations For clear, clear and definite.
Special word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary " Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.
Advantages below is had according to the screener of inlaying that the present invention is provided:1. good elastic and certain deformability, Elastic deformation can occur under differential pressure action, to adapt to the pore throat of different shape and size, the pore throat generation to size wider is good Good plugging action, reduces drilling fluid filtration;2. the aquation dispersion of clay is suppressed, with good anti-collapse effect, oil reservoir is protected Shield works well;3. the compatibility with drilling fluid and other inorganic agents is good, non-foaming;4. good hardness, in mechanical force Lower such as vibration can be separated easily with drilling cuttings such as stone, sludge, be easy to recycle;5. it is nontoxic, be conducive to environmental protection, inlay Embedding shielding drilling fluid is theoretical departing from clay dispersion system, and clay does not disperse in the system, inlays screener anti-calcium and anti-salt energy Power is strong, resists the ability of various pollutions strong.
In a preferred embodiment of the invention, as shown in fig. 1, there is provided a kind of circulating fluid does not land The method of separation of solid and liquid, including following steps:
(1)Circulating fluid, as the bulky grain drilling cuttings of greater particle size solid phase, realizes solid-liquid through the preliminary removing of principal oscillation sieve First separation, the hydrocyclone that the liquid phase after first separation is imported in desander, wherein, principal oscillation sieve wire screen selection 30-40 Mesh, makes fine sand or thin mud rock particle be easy to pass through, and prevents running pulp phenomenon;Additionally, ON cycle has to pass through principal oscillation sieve, it is to avoid Earth's surface is caused to pollute in systemic circulation hole;Wherein, the solid phase for being obtained by principal oscillation sieve separation can be carried out further by solid-liquid separating machine Separation of solid and liquid, so as to reclaim more liquid phase substances;
(2)Liquid phase after first separation is realized inlaying screener with drilling cuttings in drilling cuttings gel adsorption body through hydrocyclone Desorption and solid-liquid secondary separation, reclaim the liquid phase on top, and the solid phase after secondary separation is expelled to desanding vibratory sieve, adjusts eddy flow The liquid outlet valve of desander to underflow is umbrella stream, to force to discharge harmful solid phase, while preventing desander underflow from doing It is stifled, cause solid controlling to fail;
(3)Solid phase after secondary separation is all more than heavy weight additive through desanding vibratory sieve removing particle diameter under the effect of umbrella stream Solid phase, while the liquid phase useful material such as screener is inlayed in recovery, realizes three separation of solid-liquid, wherein, the choosing of desanding vibratory sieve wire screen 250-300 mesh is selected, to remove all solid phases of the particle diameter more than heavy weight additive;Wherein, it is highly preferred that isolated by desanding vibratory sieve Solid phase further separation of solid and liquid can be carried out by solid-liquid separating machine, so as to reclaim more liquid phase substances;
(4)The solid phase isolated in each step by more than is concentrated, reclaimed, for paving the way, laying a foundation;Meanwhile, by step(2) And step(3)The liquid phase of middle recovery is concentrated to backflash, is all recycled to drilling fluid canal, for preparing drilling fluid again.
Herein, term " drilling cuttings gel adsorption body " used refers to that the drilling cuttings for inlaying screener and its cladding is formed It is overall.
Embodiment
Embodiment 1 inlays the preparation of screener
By quartz sand, 2000g acrylamide monomers, 260g benzoyl peroxides and 200g that 100g particle diameters are 40-50 μm Lauryl sodium sulfate is added to the water, and is warming up to 60 DEG C, reacts 3 hours, and drying obtains inlaying screener A.
Embodiment 2 inlays the preparation of screener
Prepare in the same manner as in Example 1 and inlay screener B, it is 100 μm to differ only in using 100g particle diameters Quartz sand.
Embodiment 3 inlays the preparation of screener
By quartz sand, 1200g acrylamide monomers, the 150g peroxidating trimethylacetic acid tert-butyl groups that 100 particle diameters are 200-250 μm Ester and 100g triethyl group hexyl phosphoric acids are added to the water, and are warming up to 70 DEG C, and long-chain polymer is formed after the completion of reaction, and drying is obtained Inlay screener C.
Embodiment 4 inlays the preparation of screener
Prepare in the same manner as in Example 1 and inlay screener D, differ only in and be warming up to 80 DEG C.
The preparation of the drilling fluid of embodiment 5
By the super calcium of 4g, 4g is above-mentioned inlays screener A, 0.1gNH4-PAN(Hydrolysis polypropylene ammonium salt)With 91.9g saturated brines The dynamic mud cake of 3.5MPa, i.e. drilling fluid are prepared under the mixing speed of 100r/min.
The preparation of the drilling fluid of embodiment 6
92g saturated brines, the above-mentioned thin calcium of screener B and 4.0g800 mesh of inlaying of 4.0g are mixed, in the stirring of 100r/min The dynamic mud cake of 3.5MPa, i.e. drilling fluid are prepared under speed.
The preparation of the drilling fluid of embodiment 7
By 88.9g fresh water, 3g salt, 0.2g NH4Cl, 4g are above-mentioned to inlay the super calcium mixing of screener C and 4g500 mesh, The dynamic mud cake of 3.5MPa, i.e. drilling fluid are prepared under the mixing speed of 100r/min.
The preparation of the drilling fluid of embodiment 8
By 77.5 fresh water, 5g bentonites, 1gBaSO4, 2g solid graphites lubricant, 3g polymeric alcohols lubricant, 4g emulsification drip Green grass or young crops, the above-mentioned screener D that inlays of 2gKFT-2,3gSMP-2,2.5g mix, and are prepared under the mixing speed of 100r/min The dynamic mud cake of 3.5MPa, i.e. drilling fluid.
The separation of solid and liquid of the circulating fluid of embodiment 9
Gained drilling fluid in above-described embodiment 5-8 is used for gas field drilling well, respective circulation of drilling fluid slurry is obtained, by gained Discarded object is separated through following method:
A. circulating fluid realizes that solid-liquid once divides through principal oscillation sieve removing as the bulky grain drilling cuttings of greater particle size solid phase From, greater particle size solid phase is collected, the liquid phase after first separation imports desander;
B. the liquid phase after first separation is realized inlaying shielding in drilling cuttings gel adsorption body through the hydrocyclone in desander The desorption of agent and drilling cuttings and solid-liquid secondary separation, reclaim upper aqueous phase, adjust the liquid outlet valve of the hydrocyclone bottom of to It is umbrella stream to flow, from eddy flow sand device bottom go out to discharge secondary separation after be solid to desander in desanding vibratory sieve;
C. the solid phase after secondary separation is smaller solid through the desanding vibratory sieve removing particle diameter in desander under the effect of umbrella stream Phase and the smaller solid phase of collection cut size, reclaim liquid phase enter circulating line, realize three separation of solid-liquid.
In separation process, not running pulp, not plasma discharge, good separating effect, particle diameter is divided more than all solid phases of heavy weight additive Separate out come and scene be transported to using ground, do not pollute, in liquid phase and separation process produce waste water effectively reclaimed, be used for Drilling fluid is safeguarded in preparation, solves scene water difficult.
The present invention has been described in detail above in association with specific embodiment and exemplary example, but these explanations are simultaneously It is not considered as limiting the invention.It will be appreciated by those skilled in the art that without departing from the spirit and scope of the invention, Various equivalencings, modification can be carried out to technical solution of the present invention and embodiments thereof or is improved, these each fall within the present invention In the range of.Protection scope of the present invention is determined by the appended claims.

Claims (4)

1. the solid-liquid separating method that a kind of circulating fluid does not land, it is characterised in that:
Circulating fluid used refers to inlay the brill containing drilling wastes that shielding drilling fluid drilling well is obtained by using following Well liquid, the shielding drilling fluid of inlaying includes the component of following weight content:
Screener 0.2%-8.5% is inlayed,
Tackifier 0-5%,
Heavy weight additive 1-8%
Balance of basal liquid,
Wherein, the weight content refers to the percentage by weight that the component is based on inlaying shielding drilling fluid gross weight;
The basal liquid is fresh water, local area backflow sewage, salt solution or seawater;
The screener particle diameter distribution of inlaying is 4~400 μm,
The screener of inlaying is prepared by the following method:
By 100 weight portion rigid inorganic kernels, 500-2600 weight parts monomers, 50-300 weight portions initiator and 30-300 weight Part dispersant is added to the water, and is warming up to 60 DEG C -90 DEG C, and long-chain polymer is formed after the completion of reaction, and drying obtains inlaying shielding Agent,
Wherein,
The rigid inorganic kernel is quartz sand,
The monomer is acrylamide,
The initiator is selected from:Benzoyl peroxide, lauroyl peroxide, or peroxidized t-butyl perbenzoate, peroxidating uncle Pentanoic acid tert-butyl ester;
The dispersant is selected from triethyl group hexyl phosphoric acid, lauryl sodium sulfate, methyl anyl alcohol or guar gum,
The heavy weight additive is NH4Cl, KCl or KHCO3,
The tackifier are phenolic resin class organic high molecular polymer;
The method is comprised the following steps:
A. circulating fluid realizes solid-liquid first separation through principal oscillation sieve removing as the bulky grain drilling cuttings of greater particle size solid phase, Greater particle size solid phase is collected, the liquid phase after first separation imports desander, wherein, the principal oscillation sieve wire screen mesh number is 30-40 Mesh;
B. the liquid phase after first separation through the hydrocyclone in desander realize inlaying in drilling cuttings gel adsorption body screener with The desorption of drilling cuttings and solid-liquid secondary separation, reclaim upper aqueous phase, and liquid outlet valve to the underflow for adjusting hydrocyclone is Umbrella stream, from hydrocyclone bottom go out to discharge secondary separation after be solid to desander in desanding vibratory sieve, wherein, it is described Desanding vibratory sieve wire screen mesh number is 250-300 mesh;
C. the solid phase after secondary separation removes the smaller solid phase of particle diameter simultaneously under the effect of umbrella stream through the desanding vibratory sieve in desander The smaller solid phase of collection cut size, reclaim liquid phase enters circulating line, realizes three separation of solid-liquid;
The liquid phase isolated in step B and step C is concentrated to backflash, drilling fluid canal is recycled to, inlayed for preparing again Shielding drilling fluid,
Further separation of solid and liquid can be carried out by solid-liquid separating machine by the isolated solid phase of desanding vibratory sieve, so as to reclaim more Liquid phase substance.
2. the solid-liquid separating method that circulating fluid according to claim 1 does not land, it is characterised in that described to inlay screen It is the screener of inlaying of 2%-5% to cover drilling fluid including weight content, and the weight content refers to inlay screener to be based on inlaying Shield the percentage by weight of drilling fluid gross weight.
3. the solid-liquid separating method that circulating fluid according to claim 1 does not land, it is characterised in that the circulation is bored Well liquid also includes one or more other auxiliary agent, and the auxiliary agent is kollag or fluid lubricant.
4. the solid-liquid separating method that circulating fluid according to claim 1 does not land, it is characterised in that described to inlay screen Agent average grain diameter is covered at 50 μm or so.
CN201310367640.1A 2013-08-21 2013-08-21 The solid-liquid separating method that a kind of circulating fluid does not land Active CN104420844B (en)

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CN105064937B (en) * 2015-07-02 2017-06-20 万绪新 It is a kind of not land method suitable for the Continental Facies Stratigraphy drilling fluid containing high activity clay
CN110080702B (en) * 2019-05-21 2021-04-09 成都西南石大石油工程技术有限公司 Compound solvent for vibrating screen slurry leakage while-drilling treatment and treatment device
CN110566143A (en) * 2019-10-28 2019-12-13 平煤建工集团特殊凿井工程有限公司 Forced drilling slag-liquid separator

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US7540838B2 (en) * 2005-10-18 2009-06-02 Varco I/P, Inc. Centrifuge control in response to viscosity and density parameters of drilling fluid
CN100419027C (en) * 2006-03-23 2008-09-17 中国地质大学(武汉) Method for preparing high water absorption and water retention composite materials containing layer silicate mineral
CN101319607B (en) * 2008-07-22 2011-09-14 濮阳市天地人环保工程技术有限公司 Method for no-grounding treatment and comprehensive utilization of oil-gas field downhole operation output solution
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