EP0065532A1 - Procede de traitement de boues ou de debrits de forage contamines par le petrole avant leur reutilisation ou elimination - Google Patents

Procede de traitement de boues ou de debrits de forage contamines par le petrole avant leur reutilisation ou elimination

Info

Publication number
EP0065532A1
EP0065532A1 EP19810903108 EP81903108A EP0065532A1 EP 0065532 A1 EP0065532 A1 EP 0065532A1 EP 19810903108 EP19810903108 EP 19810903108 EP 81903108 A EP81903108 A EP 81903108A EP 0065532 A1 EP0065532 A1 EP 0065532A1
Authority
EP
European Patent Office
Prior art keywords
oil
solvent
solids
stream
contaminated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19810903108
Other languages
German (de)
English (en)
Inventor
James Alex Moir
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HARPSOUND Ltd
Original Assignee
HARPSOUND Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HARPSOUND Ltd filed Critical HARPSOUND Ltd
Publication of EP0065532A1 publication Critical patent/EP0065532A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B03B9/02—General arrangement of separating plant, e.g. flow sheets specially adapted for oil-sand, oil-chalk, oil-shales, ozokerite, bitumen, or the like
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
    • E21B21/065—Separating solids from drilling fluids
    • E21B21/066—Separating solids from drilling fluids with further treatment of the solids, e.g. for disposal
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/06—Arrangements for treating drilling fluids outside the borehole
    • E21B21/068—Arrangements for treating drilling fluids outside the borehole using chemical treatment
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/005—Waste disposal systems

Definitions

  • This invention relates to the treatment of oil-contaminated drill solids, e.g. drilling muds or drill cuttings prior to reuse or disposal.
  • Oil-based muds are also preferred since, in general, they permit higher drilling rates, and also they facilitate drilling at an angle to the vertical, for example, when drilling inclined well bores which may be at anything up to 50° or 60° from the vertical or more.
  • the drill cuttings from such operations present a disposal problem because of the oil contamination.
  • the hydrocarbon values in such oil-contaminated drill cuttings are proposed to be removed by a combination of vacuum distillation and grinding by heating the cuttings under reduced pressure in a pressure vessel equipped with means for milling or shearing the drill cuttings during the heating process.
  • oil contaminated drill cuttings are passed on a conveyor belt through a preheater for partial drying and then to a high-intensity infrared heating chamber in which the volatile hydrocarbons are expelled from the cuttings at a surface temperature higher than the combustion point of petroleum.
  • the oil content of oil-contaminated drill cuttings can be economically and efficiently reduced to permitted levels by washing the oil-contaminated drill cuttings, preferably after screening to remove fines and supernatant drilling mud which can be re-used, with a single solvent system consisting of a haiogenated hydrocarbon such as carbon tetrachloride or 1,1,1-trichioroethane, and centrifuging the washed cuttings to remove the oil-solvent solution, which can be recycled to the washing process and/or distilled to recover the washing solvent and an oil residue which can be recycled to the drilling process.
  • a haiogenated hydrocarbon such as carbon tetrachloride or 1,1,1-trichioroethane
  • the method of the invention is also applicable to the recovery of the drilling mud itself, particularly drilling muds which are weighted with barytes. Because of the cost element, the recovery of the barytes for reuse can be an important factor in the economics of subterranean and submarine drilling operations, and the present invention provides a simple efficient and economic way in which this can be done.
  • the separated drilling mud can be treated in essentially the same way, for example, by initial screening or centrifuging to separate out the mud solids, and removing from the separated mud solids decontaminating oil by washing with the halohydrocarbon and centrifuging in the manner described.
  • oil-contaminated drill cuttings which have been screened to remove surplus oil-based fluids and fines for re-use in the drilling operation are passed via line 1 to a mixing tank 2. If desired a portion of the separated fines may also be passed to the tank.
  • the cuttings are contacted with an organic haiohydrocarbon solvent washing liquid, preferably 1,1,1-trichloroethane, fed from a storage tank 12.
  • an organic haiohydrocarbon solvent washing liquid preferably 1,1,1-trichloroethane
  • a recycle stream of macerated slurry is fed via line 4 from the macerator 3 to the tank 2 to maintain a desirable solids concentration in the tank.
  • the main stream of macerated slurry is fed from macerator 3 via line 5 to a continuously running decanter centrifuge 6.
  • Substantially oil-free cuttings are withdrawn from the centrifuge 6 via line 7 for disposal whilst separated oil/solvent washing liquid is withdrawn via line 8. This may be recycled via line 9 to the washing tank 2 whilst a slip stream is taken off via line 10 to a distillation unit II for recovery of the solvent which is returned to the solvent storage tank 12 for re-use and separation of the oil residue via line 13.
  • the oil residue separated via line 13 will contain a proportion of fines and also substantial amounts of the chemical additives added to the original drilling mud and can either be collected for disposal, treated for further recovery of one or more components and/or returned to the drilling operation for use as recycle oilbased drilling mud.
  • the decontaminated drill cuttings withdrawn via line 7 are in a dry, non-sticky friable powder form suitable for pneumatic transportation in a carrier gas, e.g. air stream, to a disposal point.
  • a carrier gas e.g. air stream
  • the decontaminated cuttings can simply be dumped overboard since oil-contamination levels of cuttings treated in accordance with the present invention is well below the minimum standards imposed by government regulations.
  • the preferred embodiment of the invention at least, provides a substantially closed cycle for the recovery and reprocessing of the oil-based drilling mud, whilst at the same time substantially solving the disposal problems of the oil-contaminated drill cuttings.
  • the above described method and apparatus can readily be adapted for the recovery of the mud solids themselves, e.g. the barytes used in weighied drilling muds.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Des solides de forage contamines par le petrole, p.ex. des boues de forage et des debris de forage sont decontamines avant leur reutilisation ou leur elimination par lavage avec un halohydrocarbure, p.ex. 1,1-trichloroethane.
EP19810903108 1980-11-21 1981-11-20 Procede de traitement de boues ou de debrits de forage contamines par le petrole avant leur reutilisation ou elimination Withdrawn EP0065532A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8037377 1980-11-21
GB8037377 1980-11-21

Publications (1)

Publication Number Publication Date
EP0065532A1 true EP0065532A1 (fr) 1982-12-01

Family

ID=10517469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810903108 Withdrawn EP0065532A1 (fr) 1980-11-21 1981-11-20 Procede de traitement de boues ou de debrits de forage contamines par le petrole avant leur reutilisation ou elimination

Country Status (3)

Country Link
EP (1) EP0065532A1 (fr)
AU (1) AU7808881A (fr)
WO (1) WO1982001737A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0136373A1 (fr) * 1983-10-06 1985-04-10 FLOTTWEG-WERK DR. GEORG BRUCKMAYER GMBH & CO. KT Procédé pour le lavage des débris de forage
US4836302A (en) * 1986-12-03 1989-06-06 Heilhecker Joe K Apparatus and method for removing and recovering oil and/or other oil-based drilling mud additives from drill cuttings
NO164219C (no) * 1988-03-25 1990-09-12 Steinar E Mellgren Fremgangsmaate og anlegg for behandling av returnert boreslam.
AU644120B2 (en) * 1989-11-28 1993-12-02 Varco I/P Inc. Method and apparatus for cleaning drill cuttings
GB2239470B (en) * 1989-11-28 1993-12-15 Rig Technology Ltd Cleaning of cuttings from drilling operations
US5053082A (en) * 1990-02-28 1991-10-01 Conoco Inc. Process and apparatus for cleaning particulate solids
US5080721A (en) * 1990-02-28 1992-01-14 Conoco Inc. Process for cleaning particulate solids
US5107874A (en) * 1990-02-28 1992-04-28 Conoco Inc. Apparatus for cleaning particulate solids
DE4200502A1 (de) * 1992-01-13 1993-07-15 Henkel Kgaa Verbesserte entsorgung von kontaminiertem bohrklein aus geologischen bohrungen mit mineraloel-enthaltenden bohrspuelsystemen
US7867399B2 (en) 2008-11-24 2011-01-11 Arkansas Reclamation Company, Llc Method for treating waste drilling mud
US7935261B2 (en) 2008-11-24 2011-05-03 Arkansas Reclamation Company, Llc Process for treating waste drilling mud
GB201117830D0 (en) * 2011-09-16 2011-11-30 Montanuniversitat Leoben Recycling of borehole solids in polymers
CN103899262A (zh) * 2012-12-28 2014-07-02 中国石油化工股份有限公司 钻井油基钻屑随钻处理方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2189844A (en) * 1933-10-18 1940-02-13 Standard Oil Dev Co Treating mineral oil
GB456422A (en) * 1934-07-14 1936-11-09 Standard Oil Dev Co Improvements relating to the treatment of hydrocarbon oils with selective solvents
FR1586065A (fr) * 1967-10-24 1970-02-06
US3813030A (en) * 1973-05-24 1974-05-28 Atlantic Richfield Co Method for tar sands bitumen froth treatment
US3811614A (en) * 1973-06-05 1974-05-21 Atlantic Richfield Co Method for centrifuging of tar sands froth
US4040866A (en) * 1973-10-05 1977-08-09 N L Industries, Inc. Laundering of oil base mud cuttings
US4120775A (en) * 1977-07-18 1978-10-17 Natomas Company Process and apparatus for separating coarse sand particles and recovering bitumen from tar sands

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8201737A1 *

Also Published As

Publication number Publication date
AU7808881A (en) 1982-06-07
WO1982001737A1 (fr) 1982-05-27

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19830127

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MOIR, JAMES ALEX