CN104030494A - Solid-liquid separation method of waste drilling liquid - Google Patents

Solid-liquid separation method of waste drilling liquid Download PDF

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Publication number
CN104030494A
CN104030494A CN201410302681.7A CN201410302681A CN104030494A CN 104030494 A CN104030494 A CN 104030494A CN 201410302681 A CN201410302681 A CN 201410302681A CN 104030494 A CN104030494 A CN 104030494A
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China
Prior art keywords
solid
waste liquid
liquid
drilling
waste
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Pending
Application number
CN201410302681.7A
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Chinese (zh)
Inventor
周斌
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Chengdu Gaopu Petroleum Engineering Technology Co Ltd
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Chengdu Gaopu Petroleum Engineering Technology Co Ltd
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Priority to CN201410302681.7A priority Critical patent/CN104030494A/en
Publication of CN104030494A publication Critical patent/CN104030494A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a solid-liquid separation method of waste drilling liquid. The solid-liquid separation method sequentially comprises the following steps: A) collecting waste drilling liquid; B) conducting solid-liquid separation; C) carrying out coagulation sedimentation; and D) conducting centrifugal dewatering, wherein a destabilization reaction step is conducted between the steps A) and B) and comprises the following steps: sequentially adding a gel breaker, a coagulant and a flocculating agent into the waste drilling liquid obtained in the step A), wherein the addition amount of the gel breaker is to lead the pH value of the waste drilling liquid to be within 5-6. The solid-liquid separation method is simple in the technological steps, the destabilization speed of the waste drilling liquid is accelerated, the solid rate of the separated sludge can be increased, and the solid-liquid separation method is beneficial to further optimization on the waste drilling liquid separation method in the prior art.

Description

Creep into the solid-liquid separating method of waste liquid
Technical field
The present invention relates to a kind of oil gas field waste gurry treatment process, particularly relate to a kind of solid-liquid separating method that creeps into waste liquid.
Background technology
The appearance that late 1940s is sprayed drilling technology is a revolution that has drilling technology, and drill speed is stepped a stage.U.S.'s small nozzle on probation on frame of the bit first in 1949, nineteen fifty-five adopts nozzles combine system in the time of drill bit design, from then on, nozzle-type drill bit hydromechanics arises at the historic moment, people recognize that bit hydraulic parameters is the principal element that affects rate of penetration: Exxon company of U.S. test in 1973 is found in the time that injection drop is 104MPa, continuity jet can impact grinding 70%-80% institute rock drilling, and rate of penetration improves 2-3 doubly; Late 1980s, the auxiliary drilling system rate of penetration of two channels tubing string superhigh pressure water jet of Flow Drill company development improves 1.2-2.1 doubly than conventional drilling.Above jetting drilling technology, in bringing efficient drilling efficiency, has also produced a large amount of drilling fluids.
Drilling fluid COD is high, composition is complicated, is one of public relations difficult point of oil-gas field environmental protection technology to the processing of rejected well drilling liquid.Desirable solid-liquid separation process should meet treatment capacity large, separate the low requirement of mud extraction water ratio suspension content low, that separate.How further to optimize solid-liquid separation process, be the key that reduces drilling fluid processing cost and reduce drill crew's environmental disruption.
Summary of the invention
For how further optimizing solid-liquid separation process in above-mentioned prior art, be the crucial problem that reduces drilling fluid processing cost and reduce drill crew's environmental disruption, the invention provides a kind of solid-liquid separating method that creeps into waste liquid.
For the problems referred to above, the solid-liquid separating method that creeps into waste liquid provided by the invention reaches goal of the invention by following technical essential: creep into the solid-liquid separating method of waste liquid, comprise following steps in sequence:
A) waste liquid of drilling is collected;
B) solid-liquid separation;
C) coagulant precipitation;
D) centrifuge dehydration;
Described steps A) and step B) between also comprise de-steady reactions steps, described de-steady reactions steps comprises successively to by steps A) in add gel breaker, flocculation agent and flocculation agent in the waste liquid of drilling that obtains, and the add-on of gel breaker is to make the pH value of waste liquid of drilling between 5-6.
Further technical scheme is:
Described steps A) in also comprise waste collection, waste liquid sedimentation and waste liquid layering extraction step in sequence, described waste liquid layering extraction step is that the waste liquid that creeps into that waste liquid precipitation step is obtained is divided into upper, middle and lower-ranking and extracts respectively, obtain respectively waste water, low solid waste liquid and drilling cuttings, by steps A) be passed to step B) waste liquid of drilling be low solid waste liquid.
Described step C) comprise that flocculation agent adds and solid phase precipitation, described coagulating agent adds and solid phase precipitation is in earlier stage also attended by whipping step.
Also comprise harmless treatment step e), described innoxious step e) for by step B), C) and D) in the solid phase that obtains do harmless treatment, described harmless treatment is processed for adopting C20 concrete to make parcel to above-mentioned solid phase.
The Jacket thickness of C20 concrete is not less than 200mm.
The present invention has following beneficial effect:
Technique of the present invention is simple, by the de-steady reactions steps arranging, can effectively improve solid-liquid separation efficiency: gel breaker, flocculation agent and flocculation agent that de-steady reactions steps is set to add successively, can make waste liquid of drilling under strong acidic environment, a large amount of H +displace the organic polymer of clay particle surface absorption, and reduce the neatly performance of clay particle, reach the object that reduces clay stability, the high volence metal ion adding can condense respectively organic polymer and clay, thereby accelerate de-speed stabilizing degree, improve the solid holdup that separates mud extraction, reach the object of optimizing solid-liquid separation process.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but structure of the present invention is not limited only to following examples.
Embodiment 1:
Creep into the solid-liquid separating method of waste liquid, comprise following steps in sequence:
A) waste liquid of drilling is collected;
B) solid-liquid separation;
C) coagulant precipitation;
D) centrifuge dehydration;
Described steps A) and step B) between also comprise de-steady reactions steps, described de-steady reactions steps comprises successively to by steps A) in add gel breaker, flocculation agent and flocculation agent in the waste liquid of drilling that obtains, and the add-on of gel breaker is to make the pH value of waste liquid of drilling between 5-6.
Technique of the present invention is simple, by the de-steady reactions steps arranging, can effectively improve solid-liquid separation efficiency: gel breaker, flocculation agent and flocculation agent that de-steady reactions steps is set to add successively, can make waste liquid of drilling under strong acidic environment, a large amount of H +displace the organic polymer of clay particle surface absorption, and reduce the neatly performance of clay particle, reach the object that reduces clay stability, the high volence metal ion adding can condense respectively organic polymer and clay, thereby accelerate de-speed stabilizing degree, improve the solid holdup that separates mud extraction, reach the object of optimizing solid-liquid separation process.
Embodiment 2:
The present embodiment is further qualified on the basis of embodiment 1, for improving the efficiency of solid-liquid separation, described steps A) in also comprise waste collection, waste liquid sedimentation and waste liquid layering extraction step in sequence, described waste liquid layering extraction step is that the waste liquid that creeps into that waste liquid precipitation step is obtained is divided into upper, middle and lower-ranking and extracts respectively, obtain respectively waste water, low solid waste liquid and drilling cuttings, by steps A) be passed to step B) waste liquid of drilling be low solid waste liquid.
For accelerating solid phase precipitation speed and deposition rate, described step C) comprise that flocculation agent adds and solid phase precipitation, described coagulating agent adds with solid phase precipitation and is also attended by whipping step early stage.
For the solid phase contaminate environment that prevents from finally separating, also comprise harmless treatment step e), described innoxious step e) for by step B), C) and D) in the solid phase that obtains do harmless treatment, described harmless treatment is processed for adopting C20 concrete to make parcel to above-mentioned solid phase.Further, for ensureing solid phase harmless treatment effect, the Jacket thickness of C20 concrete is not less than 200mm.
Above content is the further description of the present invention being done in conjunction with concrete preferred implementation, can not assert that the specific embodiment of the present invention is confined to these explanations.For general technical staff of the technical field of the invention, not departing from other embodiments that draw under technical scheme of the present invention, all should be included in protection scope of the present invention.

Claims (5)

1. creep into the solid-liquid separating method of waste liquid, comprise following steps in sequence:
A) waste liquid of drilling is collected;
B) solid-liquid separation;
C) coagulant precipitation;
D) centrifuge dehydration;
It is characterized in that, described steps A) and step B) between also comprise de-steady reactions steps, described de-steady reactions steps comprises successively to by steps A) in add gel breaker, flocculation agent and flocculation agent in the waste liquid of drilling that obtains, and the add-on of gel breaker is to make the pH value of waste liquid of drilling between 5-6.
2. the solid-liquid separating method that creeps into waste liquid according to claim 1, it is characterized in that, described steps A) in also comprise waste collection, waste liquid sedimentation and waste liquid layering extraction step in sequence, described waste liquid layering extraction step is that the waste liquid that creeps into that waste liquid precipitation step is obtained is divided into upper, middle and lower-ranking and extracts respectively, obtain respectively waste water, low solid waste liquid and drilling cuttings, by steps A) be passed to step B) waste liquid of drilling be low solid waste liquid.
3. the solid-liquid separating method that creeps into waste liquid according to claim 1, is characterized in that, described step C) comprise that flocculation agent adds and solid phase precipitation, described coagulating agent adds and solid phase precipitation is in earlier stage also attended by whipping step.
4. the solid-liquid separating method that creeps into waste liquid according to claim 1, it is characterized in that, also comprise harmless treatment step e), described innoxious step e) for by step B), C) and D) in the solid phase that obtains do harmless treatment, described harmless treatment is processed for adopting C20 concrete to make parcel to above-mentioned solid phase.
5. the solid-liquid separating method that creeps into waste liquid according to claim 4, is characterized in that, the Jacket thickness of C20 concrete is not less than 200mm.
CN201410302681.7A 2014-06-30 2014-06-30 Solid-liquid separation method of waste drilling liquid Pending CN104030494A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201410302681.7A CN104030494A (en) 2014-06-30 2014-06-30 Solid-liquid separation method of waste drilling liquid

Publications (1)

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CN104030494A true CN104030494A (en) 2014-09-10

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107050916A (en) * 2017-03-24 2017-08-18 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 extractant and its methods and applications that discarded object is handled based on extractant
CN109209266A (en) * 2018-10-15 2019-01-15 中国石油大学(华东) A kind of fine bore meal particles sweep-out method of drilling fluid and its drilling fluid solid control handle application method with boring
CN110143653A (en) * 2019-05-13 2019-08-20 中国海洋石油集团有限公司 Weak Gels drilling liquid method for treating waste liquid

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1199393A (en) * 1997-09-26 1999-04-13 Kawasaki Heavy Ind Ltd Treatment of muddy water
CN101643308A (en) * 2009-09-24 2010-02-10 天津大学 Solid-liquid dehydration method of waste brine mud
CN101863608A (en) * 2010-06-02 2010-10-20 骆嘉成 Solid-liquid separation process for drilled pile waste mud
CN102019110A (en) * 2009-09-22 2011-04-20 中国石油天然气集团公司 Chemically reinforced solid-liquid separation method for well drilling waste liquid
CN102320699A (en) * 2011-06-22 2012-01-18 西南石油大学 Method for destabilization coagulating treatment of well drilling waste liquid
CN103626344A (en) * 2013-11-05 2014-03-12 中国石油集团长城钻探工程有限公司 Water-based drilling fluid waste solid-liquid separation equipment and method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1199393A (en) * 1997-09-26 1999-04-13 Kawasaki Heavy Ind Ltd Treatment of muddy water
CN102019110A (en) * 2009-09-22 2011-04-20 中国石油天然气集团公司 Chemically reinforced solid-liquid separation method for well drilling waste liquid
CN101643308A (en) * 2009-09-24 2010-02-10 天津大学 Solid-liquid dehydration method of waste brine mud
CN101863608A (en) * 2010-06-02 2010-10-20 骆嘉成 Solid-liquid separation process for drilled pile waste mud
CN102320699A (en) * 2011-06-22 2012-01-18 西南石油大学 Method for destabilization coagulating treatment of well drilling waste liquid
CN103626344A (en) * 2013-11-05 2014-03-12 中国石油集团长城钻探工程有限公司 Water-based drilling fluid waste solid-liquid separation equipment and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107050916A (en) * 2017-03-24 2017-08-18 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 extractant and its methods and applications that discarded object is handled based on extractant
CN109209266A (en) * 2018-10-15 2019-01-15 中国石油大学(华东) A kind of fine bore meal particles sweep-out method of drilling fluid and its drilling fluid solid control handle application method with boring
CN110143653A (en) * 2019-05-13 2019-08-20 中国海洋石油集团有限公司 Weak Gels drilling liquid method for treating waste liquid

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Application publication date: 20140910