ES2182995T3 - Agente reductor de la resistencia al flujo de baja viscosidad y alta concentracion y proceso para el mismo. - Google Patents

Agente reductor de la resistencia al flujo de baja viscosidad y alta concentracion y proceso para el mismo.

Info

Publication number
ES2182995T3
ES2182995T3 ES96921636T ES96921636T ES2182995T3 ES 2182995 T3 ES2182995 T3 ES 2182995T3 ES 96921636 T ES96921636 T ES 96921636T ES 96921636 T ES96921636 T ES 96921636T ES 2182995 T3 ES2182995 T3 ES 2182995T3
Authority
ES
Spain
Prior art keywords
polymer
solvent
braking
reducing
suspension
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.)
Expired - Lifetime
Application number
ES96921636T
Other languages
English (en)
Inventor
Keith Fairchild
Robert Tipton
John F Motier
Nagesh S Kommareddi
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.)
Baker Hughes Holdings LLC
Original Assignee
Baker Hughes Inc
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 Baker Hughes Inc filed Critical Baker Hughes Inc
Application granted granted Critical
Publication of ES2182995T3 publication Critical patent/ES2182995T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17DPIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00Pipe-line systems
    • F17D1/08Pipe-line systems for liquids or viscous products
    • F17D1/16Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F6/00Post-polymerisation treatments
    • C08F6/06Treatment of polymer solutions
    • C08F6/12Separation of polymers from solutions
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/143Organic compounds mixtures of organic macromolecular compounds with organic non-macromolecular compounds
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/16Hydrocarbons
    • C10L1/1625Hydrocarbons macromolecular compounds
    • C10L1/1633Hydrocarbons macromolecular compounds homo- or copolymers obtained by reactions only involving carbon-to carbon unsaturated bonds
    • C10L1/1641Hydrocarbons macromolecular compounds homo- or copolymers obtained by reactions only involving carbon-to carbon unsaturated bonds from compounds containing aliphatic monomers
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/18Organic compounds containing oxygen
    • C10L1/182Organic compounds containing oxygen containing hydroxy groups; Salts thereof
    • C10L1/1822Organic compounds containing oxygen containing hydroxy groups; Salts thereof hydroxy group directly attached to (cyclo)aliphatic carbon atoms
    • C10L1/1824Organic compounds containing oxygen containing hydroxy groups; Salts thereof hydroxy group directly attached to (cyclo)aliphatic carbon atoms mono-hydroxy
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/18Organic compounds containing oxygen
    • C10L1/185Ethers; Acetals; Ketals; Aldehydes; Ketones
    • C10L1/1852Ethers; Acetals; Ketals; Orthoesters
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/18Organic compounds containing oxygen
    • C10L1/185Ethers; Acetals; Ketals; Aldehydes; Ketones
    • C10L1/1857Aldehydes; Ketones
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/18Organic compounds containing oxygen
    • C10L1/188Carboxylic acids; metal salts thereof
    • C10L1/1881Carboxylic acids; metal salts thereof carboxylic group attached to an aliphatic carbon atom
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/18Organic compounds containing oxygen
    • C10L1/19Esters ester radical containing compounds; ester ethers; carbonic acid esters
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00Liquid carbonaceous fuels
    • C10L1/10Liquid carbonaceous fuels containing additives
    • C10L1/14Organic compounds
    • C10L1/28Organic compounds containing silicon

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Water Supply & Treatment (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Polymers & Plastics (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

PUEDEN PREPARARSE AGENTES REDUCTORES DEL FRENADO DE ELEVADA CONCENTRACION Y BAJA VISCOSIDAD AÑADIENDO LENTAMENTE UN NO DISOLVENTE LIQUIDO (POR EJEMPLO ALCOHOL ISOPROPILICO) PARA UN POLIMERO REDUCTOR DEL FRENADO (POR EJEMPLO UNA POLIALFAOLEFINA) A UNA MEZCLA DEL POLIMERO Y EL DISOLVENTE (POR EJEMPLO QUEROSENO) EN EL CUAL ESTA DISUELTO EL POLIMERO. CUANDO SE AÑADE EL SUFICIENTE NO DISOLVENTE, EL POLIMERO PRECIPITA EN PARTICULAS FINAS. ENTONCES SE ELIMINA LA MEZCLA SOBRENADANTE DE DISOLVENTE Y NO DISOLVENTE DEL CONCENTRADO DE SUSPENSION DE POLIMERO PRECIPITADO. PUEDE ELIMINARSE MAS DISOLVENTE CONTENIDO EN EL CONCENTRADO DE SUSPENSION MEDIANTE EVAPORACION O POSTERIOR EXTRACCION CON EL NO DISOLVENTE LIQUIDO. EL CONCENTRADO DE SUSPENSION RESULTANTE SE DISUELVE RAPIDAMENTE EN CORRIENTES DE HIDROCARBUROS FLUIDAS PARA REDUCIR SU FRENADO Y PRODUCE UNOS RESULTADOS DE REDUCCION DE FRENADO EXCEPCIONALMENTE BUENOS A BAJAS CONCENTRACIONES. ADEMAS NO SE NECESITAN SONDAS DE INYECCION U OTRO EQUIPO ESPECIALPARA INTRODUCIR LA SUSPENSION REDUCTORA DEL FRENADO EN LA CORRIENTE DE HIDROCARBURO, NI TAMPOCO ES NECESARIO TRITURAR EL POLIMERO PARA FORMAR UNA SUSPENSION DE AGENTE REDUCTOR DEL FRENADO ADECUADA.
ES96921636T 1995-06-29 1996-06-14 Agente reductor de la resistencia al flujo de baja viscosidad y alta concentracion y proceso para el mismo. Expired - Lifetime ES2182995T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/496,489 US5733953A (en) 1995-06-29 1995-06-29 Low viscosity, high concentration drag reducing agent and method therefor

Publications (1)

Publication Number Publication Date
ES2182995T3 true ES2182995T3 (es) 2003-03-16

Family

ID=23972872

Family Applications (1)

Application Number Title Priority Date Filing Date
ES96921636T Expired - Lifetime ES2182995T3 (es) 1995-06-29 1996-06-14 Agente reductor de la resistencia al flujo de baja viscosidad y alta concentracion y proceso para el mismo.

Country Status (8)

Country Link
US (1) US5733953A (es)
EP (1) EP0835268B1 (es)
AU (1) AU6281096A (es)
DE (1) DE69623293T2 (es)
DK (1) DK0835268T3 (es)
ES (1) ES2182995T3 (es)
NO (1) NO315945B1 (es)
WO (1) WO1997001582A1 (es)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6015779A (en) 1996-03-19 2000-01-18 Energy & Environmental International, L.C. Methods for forming amorphous ultra-high molecular weight polyalphaolefin drag reducing agents
US6126872A (en) * 1998-01-27 2000-10-03 Baker Hughes Incorporated Microencapsulated drag reducing agents
US6178980B1 (en) 1998-08-26 2001-01-30 Texaco Inc. Method for reducing the pipeline drag of heavy oil and compositions useful therein
FI117704B (fi) * 2000-05-15 2007-01-31 M I Finland Oy Menetelmä vastusta vähentävän koostumuksen valmistamiseksi ja menetelmä hiilivetyvirtauksen vastuksen vähentämiseksi
US6815011B2 (en) 2000-11-27 2004-11-09 Energy & Environmental International, L.C. Alpha olefin monomer partitioning agents for drag reducing agents and methods of forming drag reducing agents using alpha olefin monomer partitioning agents
ATE458758T1 (de) 2001-01-16 2010-03-15 Beta Technologie Ag Verfahren zur herstellung von amorphen polyolefinen mit ultrahohem molekulargewicht zur strömungbeschleunigung
US6774094B2 (en) 2001-04-24 2004-08-10 Baker Hughes Incorporated Drag reduction using fatty acids
JP4116266B2 (ja) * 2001-05-25 2008-07-09 株式会社オメガ 携帯可能な殺菌洗浄水の生成方法と其の装置
US7012046B2 (en) * 2001-06-08 2006-03-14 Eaton Gerald B Drag reducing agent slurries having alfol alcohols and processes for forming drag reducing agent slurries having alfol alcohols
US6989357B2 (en) * 2001-06-08 2006-01-24 Eaton Gerald B Alcohol absorbed polyalphaolefin drag reducing agents
US6841593B2 (en) * 2001-07-05 2005-01-11 Baker Hughes Incorporated Microencapsulated and macroencapsulated drag reducing agents
US7018434B2 (en) 2002-04-18 2006-03-28 Southwest Research Institute Removal of drag reducer additive from fuel by treatment with selected activated carbons and graphites
US6649670B1 (en) * 2002-12-17 2003-11-18 Baker Hughes Incorporated Continuous neat polymerization and ambient grinding methods of polyolefin drag reducing agents
US6894088B2 (en) * 2003-03-24 2005-05-17 Baker Hughes Incorporated Process for homogenizing polyolefin drag reducing agents
US7364599B2 (en) * 2003-06-03 2008-04-29 Southwest Research Institute Methods for increased removal of drag reducer additives from liquid hydrocarbon fuel
US7264640B2 (en) * 2003-06-03 2007-09-04 Southwest Research Institute Method for improving the performance of engines powered by liquid hydrocarbon fuel
US7261747B2 (en) * 2004-03-08 2007-08-28 Southwest Research Institute Removal of drag reducer additive from liquid hydrocarbon fuel using attapulgus clay
CA2606796A1 (en) * 2005-06-14 2006-12-28 Baker Hughes Incorporated Combination of polymer slurry types for optimum pipeline drag reduction
US20080064785A1 (en) * 2005-06-14 2008-03-13 Baker Hughes Incorporated Bi- or Multi-Modal Particle Size Distribution To Improve Drag Reduction Polymer Dissolution
MX2007015623A (es) * 2005-06-14 2008-02-21 Baker Hughes Inc Distribucion de tamano de particula bi-o multi-modal para mejorar la disolucion de polimero de reduccion de arrastre.
US7271205B2 (en) * 2005-09-20 2007-09-18 Baker Hughes Incorporated Non-cryogenic process for granulating polymer drag reducing agents
CN101379160B (zh) * 2006-02-08 2012-04-25 贝克休斯公司 稳定化且凝固保护的聚合物减阻剂悬浮液
US8550165B2 (en) 2010-08-13 2013-10-08 Baker Hughes Incorporated Well servicing fluid
RU2481357C1 (ru) 2011-09-30 2013-05-10 Открытое акционерное общество "Акционерная компания по транспорту нефти "Транснефть" (ОАО "АК "Транснефть") Способ получения противотурбулентной присадки суспензионного типа, снижающей гидродинамическое сопротивление углеводородных жидкостей
RU2639301C2 (ru) * 2015-04-03 2017-12-21 Публичное акционерное общество "Татнефть" имени В.Д. Шашина Противотурбулентные присадки для снижения гидродинамического сопротивления углеводородных жидкостей в трубопроводах и способ их получения
RU2579588C1 (ru) * 2015-06-15 2016-04-10 Общество с ограниченной ответственностью "НефтеТрансХим" Противотурбулентная присадка и способ ее получения
RU2579583C1 (ru) * 2015-07-24 2016-04-10 Общество с ограниченной ответственностью "НефтеТрансХим" Способ получения противотурбулентной присадки и противотурбулентная присадка, полученная на его основе
RU2590535C1 (ru) * 2015-09-02 2016-07-10 Общество С Ограниченной Ответственностью "Ника-Петротэк" Способ получения противотурбулентной присадки на основе полиальфаолефинов (варианты)
RU2599986C1 (ru) * 2015-09-07 2016-10-20 Общество С Ограниченной Ответственностью "Ника-Петротэк" Агент снижения гидродинамического сопротивления и способ его получения
RU2606975C1 (ru) * 2015-12-14 2017-01-10 Общество с ограниченной ответственностью "КЕМТЕК" Способ получения противотурбулентной присадки с рециклом мономера
RU2670444C1 (ru) * 2017-06-09 2018-10-23 Публичное акционерное общество "СИБУР Холдинг" Способ получения антитурбулентной присадки суспензионного типа и антитурбулентная присадка суспензионного типа
RU2675239C1 (ru) * 2017-12-12 2018-12-18 Публичное акционерное общество "СИБУР Холдинг" Способ приготовления стабильной неагломерирующей суспензии и антитурбулентной присадки на ее основе
US11767487B2 (en) 2020-07-13 2023-09-26 Baker Hughes Oilfield Operations Llc Inverting aids for latex-based drag reducing agents
RU2754173C1 (ru) * 2020-07-21 2021-08-30 Публичное акционерное общество "Транснефть" (ПАО "Транснефть") Способ получения противотурбулентных присадок для применения в условиях низких температур транспортируемой среды

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2879173A (en) * 1956-03-06 1959-03-24 Du Pont Process for preparing free-flowing pellets of polychloroprene and the resulting product
US3692676A (en) * 1969-12-22 1972-09-19 Continental Oil Co Method of friction loss reduction in oleaginous fluids flowing through conduits
US3736288A (en) * 1971-07-09 1973-05-29 Union Carbide Corp Drag reducing formulations
US3884252A (en) * 1973-06-20 1975-05-20 Shell Oil Co Friction reduction
US4177177A (en) * 1976-03-26 1979-12-04 El Aasser Mohamed S Polymer emulsification process
US4123403A (en) * 1977-06-27 1978-10-31 The Dow Chemical Company Continuous process for preparing aqueous polymer microsuspensions
US4212312A (en) * 1978-08-28 1980-07-15 Shell Oil Company Fragmented polymers as friction reducers in pipeline transportation of products
US4527581A (en) * 1981-02-02 1985-07-09 Atlantic Richfield Company Compositions for and method of reducing hydrocarbon fluid friction loss in conduits
US4510304A (en) * 1982-09-30 1985-04-09 General Technology Applications, Inc. Polymer fractionation
US4499214A (en) * 1983-05-03 1985-02-12 Diachem Industries, Inc. Method of rapidly dissolving polymers in water
US4584244A (en) * 1985-05-28 1986-04-22 Conoco Inc. Preparation of cold flow resistant polymer powders
US4845178A (en) * 1985-11-21 1989-07-04 Pony Industries, Inc. Polymerization process
US4720397A (en) * 1985-12-12 1988-01-19 General Technology Applications, Inc. Rapid dissolving polymer compositions and uses therefor
US5244937A (en) * 1990-09-04 1993-09-14 Conoco Inc. Stable nonagglomerating aqueous suspensions of oil soluble polymeric friction reducers
US5165440A (en) * 1991-12-30 1992-11-24 Conoco Inc. Process and apparatus for blending viscous polymers in solvent
US5449732A (en) * 1993-06-18 1995-09-12 Conoco Inc. Solvent free oil soluble drag reducing polymer suspension
US5376697B1 (en) * 1993-06-21 1998-06-02 Conoco Inc Drag reducers for flowing hydrocarbons
US5539044A (en) * 1994-09-02 1996-07-23 Conoco In. Slurry drag reducer

Also Published As

Publication number Publication date
DE69623293D1 (de) 2002-10-02
EP0835268A1 (en) 1998-04-15
NO976031L (no) 1998-02-13
NO315945B1 (no) 2003-11-17
EP0835268B1 (en) 2002-08-28
AU6281096A (en) 1997-01-30
US5733953A (en) 1998-03-31
DE69623293T2 (de) 2003-11-13
DK0835268T3 (da) 2003-01-06
NO976031D0 (no) 1997-12-22
WO1997001582A1 (en) 1997-01-16

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