WO2012177568A1 - Matériaux encapsulés et leur utilisation dans des puits de pétrole et de gaz - Google Patents

Matériaux encapsulés et leur utilisation dans des puits de pétrole et de gaz Download PDF

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Publication number
WO2012177568A1
WO2012177568A1 PCT/US2012/043020 US2012043020W WO2012177568A1 WO 2012177568 A1 WO2012177568 A1 WO 2012177568A1 US 2012043020 W US2012043020 W US 2012043020W WO 2012177568 A1 WO2012177568 A1 WO 2012177568A1
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WO
WIPO (PCT)
Prior art keywords
encapsulating
encapsulated
active component
component
encapsulated material
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.)
Ceased
Application number
PCT/US2012/043020
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English (en)
Inventor
Sumitra Mukhopadhyay
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.)
Schlumberger Canada Ltd
Services Petroliers Schlumberger SA
Schlumberger Technology BV
Schlumberger Holdings Ltd
Prad Research and Development Ltd
Original Assignee
Schlumberger Canada Ltd
Services Petroliers Schlumberger SA
Schlumberger Technology BV
Schlumberger Holdings Ltd
Prad Research and Development 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 Schlumberger Canada Ltd, Services Petroliers Schlumberger SA, Schlumberger Technology BV, Schlumberger Holdings Ltd, Prad Research and Development Ltd filed Critical Schlumberger Canada Ltd
Publication of WO2012177568A1 publication Critical patent/WO2012177568A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
    • C09K8/516—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls characterised by their form or by the form of their components, e.g. encapsulated material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
    • C08B1/003—Preparation of cellulose solutions, i.e. dopes, with different possible solvents, e.g. ionic liquids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B16/00—Regeneration of cellulose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/62—Compositions for forming crevices or fractures
    • C09K8/70—Compositions for forming crevices or fractures characterised by their form or by the form of their components, e.g. foams
    • C09K8/706—Encapsulated breakers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/92—Compositions for stimulating production by acting on the underground formation characterised by their form or by the form of their components, e.g. encapsulated material
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/25—Methods for stimulating production

Definitions

  • This invention relates to compositions and methods for treating subterranean formations in oil and gas wells with encapsulated materials.
  • Encapsulated materials have been used in the oil and gas well industry for the controlled or delayed release of materials downhole. Such materials employ the use of an encapsulating material that contains the active or useful material from being prematurely released. A variety of different materials and encapsulating techniques have been used. While encapsulated materials and their use are known, new and improved materials and methods related to encapsulated materials are desired.
  • a method of treating a subterranean formation penetrated by a wellbore is performed by introducing an encapsulated material into the wellbore.
  • the encapsulated material is comprised of an encapsulating component formed from a regenerated ionic- liquid-dissolved compound and an active component that is encapsulated by the encapsulating component.
  • the encapsulating material is allowed to release the active component into the formation.
  • the regenerated ionic-liquid-dissolved compound is a cellulose material.
  • the encapsulated material may release the active component when subjecting the encapsulated material to electromagnetic energy.
  • the encapsulated material may further include a susceptor.
  • the susceptor may be selected from at least one of a metal, graphite, and carbon-black.
  • the active component may be selected from at least one of a breaker, an emulsifier, a cross-linking agent, an acid, a base, an oxidizer, an acid precursor, and a base precursor.
  • the encapsulating material may release the active component into the formation when the encapsulated material is subjected to at least one of temperatures, mechanical forces, and degrading materials that facilitate degrading of the encapsulating component.
  • method of treating a subterranean formation penetrated by a wellbore is performed by introducing an encapsulated material into the wellbore comprising an encapsulating component formed from a regenerated ionic-liquid-dissolved cellulose and an active component that is encapsulated by the encapsulating component.
  • the encapsulating material is allowed to release the active component into the formation.
  • the encapsulated material releases the active component by subjecting the encapsulated material to electromagnetic energy.
  • the encapsulated material may further comprises a susceptor, which may be selected from at least one of metal, graphite, and carbon-black.
  • the active component may be selected from at least one of a breaker, an emulsifier, a cross-linking agent, an acid, a base, an oxidizer, an acid precursor, and a base precursor.
  • this may include subjecting the encapsulated material to at least one of temperatures, mechanical forces, degrading materials sufficient to degrade the encapsulating component.
  • a method of treating a subterranean formation penetrated by a wellbore is performed by introducing an encapsulated material comprising an encapsulating component and an active component that is encapsulated by the encapsulating component into the wellbore.
  • the encapsulating component is degradable when subjected to electromagnetic radiation having a frequency of from about 300 MHz to about 300 GHz.
  • the encapsulated material is subjected to electromagnetic energy in the frequency range of from about 300 MHz to about 300 GHz to degrade the encapsulating component and facilitate the release the active component into the formation.
  • the encapsulating component is formed from a regenerated ionic-liquid-dissolved compound.
  • the regenerated ionic-liquid-dissolved compound may be a regenerated ionic-liquid-dissolved cellulose material.
  • the encapsulated material may further comprise a susceptor, which may be selected from at least one of a metal, graphite, and carbon-black.
  • the active component may be selected from at least one of a breaker, an emulsifier, a cross-linking agent, an acid, a base, an oxidizer, an acid precursor, a base precursor.
  • FIGURE 1 shows a series of photos of cellulose filter paper strips in an ionic liquid after microwaving the mixture in three microwave pulses showing the degree of dissolution after each pulse;
  • FIGURE 2 shows photos of regenerated ionic-liquid-dissolved cellulose particles before and after microwaving in water:
  • FIGURE 3 shows photos of examples of encapsulated PLA beads encapsulated with a regenerated ionic-liquid-dissolved cellulose encapsulating material before and after being microwaved in water.
  • a concentration range listed or described as being useful, suitable, or the like is intended that any and every concentration within the range, including the end points, is to be considered as having been stated.
  • a range of from 1 to 10 is to be read as indicating each and every possible number along the continuum between about 1 and about 10.
  • the encapsulated materials of embodiments of the invention are designed to enclose and/or protect their contents until they are at an intended site of delivery or until conditions of delivery are encountered. In this way, they can be used as a means to contain potentially hazardous or difficult-to-handle components and/or to deliver such components to a well bore or a surrounding subterranean formation to perform a desired function.
  • the encapsulated materials also facilitate separating components of a downhole fluid where it is desired to have such components temporarily separated until they reach a desired location or until a desired amount of time has elapsed or conditions exists. Thereafter, the active component of the encapsulated material may be released so that the active component reacts or performs its particular function.
  • active with respect to the active component is merely used to indicate that it is the component that is desired to be released from the encapsulating component or material and it does not necessarily refer or relate to its reactivity, as some active component materials may be chemically inert or non-reactive in nature, but their separation or delayed release may still be desired for a particular use or purpose.
  • Ionic liquids are used to form the encapsulated materials of the invention.
  • Ionic liquids are salts with a melting temperature below 150 °C, more typically below 100 °C.
  • the ionic liquids are made of ions and have many desirable properties. They are chemically and thermally stable, non-flammable, and have an immeasurably low vapor pressure. They may be available as solid and liquid forms at room temperature. Because the ionic liquids are formed from solely ionized species, they are highly responsive to electromagnetic radiation, such as microwave radiation. Exposure to such radiation at even very low levels or for short durations can rapidly heat the ionic liquids. They also exhibit unusual solvent properties for both polar and non-polar compounds.
  • the ionic liquids can be used for water-sensitive processes and because of their low or non-existent vapor pressure, the ionic liquids may be an environmentally-friendly alternative for other organic solvents.
  • the ionic liquids are typically based on ammonium, imidazolium or pyridinium salts, although other salts exist.
  • the ionic liquids can be soluble (hydrophilic) or insoluble (hydrophobic) in water.
  • hydrophilic ILs are those described in U.S. Patent No. 6,808,557, which is herein incorporated by reference in its entirety for all purposes.
  • hydrophobic ILs are those described in U.S. Patent No. 5,827,602, which is herein incorporated by reference in its entirety for all purposes.
  • hydrophilic ILs include l-butyl-3- methylimidazolium chloride ([BMIMJC1), l-butyl-3-methlimidazolium acetate ([BMIM]OAc), l-ethyl-3-methylimidazolium chloride ([EMIM]C1) and l-ethyl-3- methylimidazolium acetate ([EMIMJOAc).
  • hydrophobic ILs include l-butyl-3-methylimidazolium bis(trifluoromethane sulonyl)imide ([BMIM][CF 3 S0 2 ]2N) and l-butyl-3-methylimidazolium hexafluorophosphate (BMIM][PF 6 ]).
  • the ionic liquid's properties as a solvent various materials can be dissolved in the ionic solvents. Such dissolved compounds can then be used to form an encapsulating material.
  • the materials may be immersed or contacted with the ionic liquids.
  • the ionic liquids may be heated, such as through micro waving or other heating means to facilitate dissolving of the contacted materials.
  • the formed solution may be used as an encapsulating material to encapsulate the active component.
  • the active component may be a solid or liquid compound.
  • Various encapsulating techniques may be used. Active component solids may be coated with the IL solution to provide the encapsulation.
  • Active component liquids may be dissolved in the solution itself or droplets of the liquid active component may be contacted with the solution.
  • U.S. Patent No. 6,808,557 describes suitable encapsulation techniques.
  • the encapsulating material with the ionic liquid hardens to form the encapsulating material, which now constitutes a regenerated ionic-liquid dissolved compound.
  • the ionic liquid is also incorporated into the encapsulated material and may serve as a solvent to facilitate subsequent dissolving of the non-ionic-liquid encapsulating component for release of the active component.
  • the active component itself may be at a reduced temperature prior to contacting with the dissolved encapsulating material to facilitate the hardening of the dissolved encapsulating material.
  • Contacting the solution with a regenerating fluid or non-solvent diluent may also be used to regenerate the encapsulating material.
  • the regenerating fluid or non-solvent diluent may be a non-solvent for the active component and encapsulating material.
  • the regenerating fluid or non-solvent diluent may be miscible with the ionic liquid, however.
  • cellulose materials are particularly well suited for the encapsulating material.
  • Cellulose exhibits high solubility in ionic liquids.
  • the cellulose materials may be any cellulose material that can be dissolved in the ionic liquids and that provides a suitable encapsulating material once regenerated.
  • suitable cellulose materials may include those from wood, cotton, grass, straw, hemp, etc., or other naturally occurring cellulosic materials. They may also include those made from viscose materials, such as cellophane, Rayon, etc. Combinations of different cellulose materials may also be used.
  • the cellulose materials may be in a variety of initial forms including powder, fiber, sheets, paper, cloth, sponge, wood, straw, grass, etc.
  • the cellulose materials can be dissolved in the ionic liquids, by heating or microwaving the ionic liquid to dissolve the cellulose material. For example, it has been found that when cellulose is added to [EMIMJOAc and heated with a series of 3 to 5 second microwave pulses, a clear cellulose solution can be obtained. The same solution can be obtained by merely heating without microwaves if the mixture is kept at 200 °F (93.3 °C) for several hours.
  • the cellulose may be used in varying amounts in the ionic liquids. As used herein, for ease of discussion, although specific reference is made to cellulose materials in the discussion that follows, it should be read to include other suitable encapsulating materials that may be dissolved in the ionic liquids and used in a similar manner to cellulose, unless otherwise stated or is otherwise apparent from the context.
  • the cellulose may make up from about 5% to about 35% by weight of the cellulose/IL solution. More particularly, the cellulose may make up from about 5% to about 25% by weight of solution, and still more particularly from about 10% to about 25% by weight of the solution.
  • the active component may include a variety of different materials. These may include breakers, emulsifiers, gelling agents, cross-linking agents, acids, bases, oxidizers, etc., including any precursors of such materials that form the materials in situ, such as polylactic acid (PLA) or polyglycolic acid (PGA).
  • breakers such as breakers, emulsifiers, gelling agents, cross-linking agents, acids, bases, oxidizers, etc., including any precursors of such materials that form the materials in situ, such as polylactic acid (PLA) or polyglycolic acid (PGA).
  • PLA polylactic acid
  • PGA polyglycolic acid
  • the amount of cellulose to the active component may also vary.
  • the active component may be used in an amount of from about 1000: 1 to about 1 :2 by weight cellulose component to active component.
  • the active component makes up from bout 100: 1 to about 1 : 1 by weight of cellulose component to active component. Similar weight ratios may also be reflected in the regenerated product.
  • the regenerated ionic-liquid-dissolved cellulose will contain or have incorporated into it the ionic liquid.
  • the ionic may be trapped inside or coated with the cellulose material or otherwise be incorporated therein. Because the ionic liquid may form a part of the encapsulated material and due to its high responsiveness to electromagnetic radiation, it may tend to act as a susceptor that facilitates heating of the encapsulated particle when subjected to electromagnetic radiation or energy, such as microwaves.
  • the heating of encapsulated material causes the encapsulating material to degrade, with the ionic liquid acting as a solvent for the cellulose, so that it causes the active component to thereby be released.
  • an additional susceptor material that facilitates heating of the encapsulated material when subjected to such radiation may be incorporated into the encapsulated material.
  • Such materials may include various metals (iron, copper, aluminum, etc.), graphite, carbon black, etc. Combinations of such materials may also be used.
  • Such materials may be used as particles that are dispersed or incorporated within the encapsulating material component or active component. In certain embodiments, they may be dispersed within the dissolved cellulose solution prior to regenerating the cellulose material. Examples of various susceptor materials and their use are described in U.S. Patent Application Publication No. US2008/0149335A1, which is herein incorporated by reference in its entirety for all purposes.
  • the encapsulated materials may be of different sizes and shapes.
  • the particle size of the encapsulated materials may vary depending upon the components being used and their purpose and use. As an example, however, the particle size of the encapsulated materials may range from about 3mm to about 20mm.
  • the configurations and shapes may also vary, such as spherical, oblong, oval, cylindrical, etc.
  • the encapsulated materials may be used in a treatment fluid that is introduced into a subterranean formation through a wellbore, such as those used in hydrocarbon production.
  • the treatment fluid may be an aqueous fluid, such as fresh water, city water, river water, lake water, pond water, flow back water, produced water, re-used water, sea water, salt solutions or brines, although the treatment fluid may include other fluids, aqueous or non-aqueous.
  • the treatment fluid may include other components as well, which may or may not react or otherwise interact with the active component of the encapsulated material.
  • the treatment fluids incorporating the encapsulating materials may have a variety of compositions, applications and uses.
  • the treatment fluid may be a hydraulic fracturing fluid, an acid fracturing fluid, an acid diverting fluid, a matrix acidizing fluid, a sandstone acidizing fluid, a sand control treatment fluid, a wellbore consolidation treatment fluid, a cementing treatment fluid, a drilling fluid, a water control fluid, a remediation treatment fluid, or any other well treatment fluid where a chemical reaction or a chemical or physical process takes place that may utilize an encapsulated material.
  • the treatment fluid may include a viscosifying agent or agents, such as hydratable polymers or viscoelastic surfactants (VES).
  • the treatment fluid may also contain other components, which may be encapsulated with the encapsulating materials of the invention or with other encapsulating materials.
  • the other components may also be non-encapsulated.
  • Non-limiting examples of materials and components that may be included with the treatment fluid include sand, fibers, proppant, crosslinkers, crosslinker activators, oxygen scavengers, crosslinker delaying agents, breakers, pH buffers, iron control agents, clay control agents, scale control additives, fine control additives, friction reducers, biocides, flow back additives, pH buffers, gas components, etc.
  • the amount of encapsulated material used in the treatment fluid will depend upon the treatment being performed, the amount of material for which the active component is to react or interact, etc.
  • the release of the active component from the encapsulated material can be achieved in a variety of ways. In certain embodiments, however, this is accomplished through the use of electromagnetic radiation.
  • microwave radiation having a frequency of from about 300 MHz to about 300 GHz, more particularly from about lGHz to about 100 GHz may be used.
  • Generators of such radiation or microwaves can be provided downhole, such as on a drilling strings, cables, coiled tubing, etc. Examples of providing electromagnetic and microwave radiation downhole are described, for instance, in U.S. Patent No. 4,678,034; U.S. Patent Application Publication Nos.
  • the encapsulating component can be degraded to facilitate the release of the active component into the formation.
  • the electromagnetic radiation may be microwave radiation and may have a frequency of from about 300 MHz to about 300 GHz, more particularly from about lGHz to about 100 GHz. [0034] Alternative release mechanisms may also be employed.
  • Enzymes may be used as one particular type of degrading compound that may be employed with the cellulose encapsulating materials.
  • the enzymes may be cellulases, which may be cellulases themselves, hemi- cellulases, endo-cellulases or exo-cellulases.
  • the enzymes may also be proteases. Combinations of different enzymes may also be used. The enzymes may be used in an amount to facilitate degrading of the encapsulating material. Combinations of all of the above-described release mechanisms may also be employed with the encapsulated materials.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Biochemistry (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacturing Of Micro-Capsules (AREA)

Abstract

L'invention concerne un procédé de traitement d'une formation souterraine traversée par un puits de forage, comportant une étape consistant à introduire dans le puits de forage un matériau encapsulé comportant un composant d'encapsulation formé à partir d'un composé régénéré dissous dans un liquide ionique et un composant actif qui est encapsulé par le composant d'encapsulation. On laisse ensuite le matériau d'encapsulation libérer le composant actif dans la formation. Dans un autre procédé de traitement, un matériau encapsulé comportant un composant d'encapsulation et un composant actif encapsulé par le composant d'encapsulation sont introduits dans le puits de forage. Le composant d'encapsulation est dégradable lorsqu'il est soumis à un rayonnement électromagnétique d'une fréquence comprise entre environ 300 MHz et environ 300 GHz. Le matériau encapsulé est alors soumis à une énergie électromagnétique dans la gamme de fréquences allant d'environ 300 MHz à environ 300 GHz pour dégrader le composant d'encapsulation et faciliter la libération du composant actif dans la formation.
PCT/US2012/043020 2011-06-24 2012-06-18 Matériaux encapsulés et leur utilisation dans des puits de pétrole et de gaz Ceased WO2012177568A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/168,360 US20120325471A1 (en) 2011-06-24 2011-06-24 Encapsulated materials and their use in oil and gas wells
US13/168,360 2011-06-24

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WO2012177568A1 true WO2012177568A1 (fr) 2012-12-27

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Cited By (3)

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US10081758B2 (en) 2015-12-04 2018-09-25 Ecolab Usa Inc. Controlled release solid scale inhibitors
US10865339B2 (en) 2016-05-16 2020-12-15 Championx Usa Inc. Slow-release scale inhibiting compositions
US11142680B2 (en) 2016-12-23 2021-10-12 Championx Usa Inc. Controlled release solid scale inhibitors

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US20140182854A1 (en) * 2012-12-28 2014-07-03 Superior Energy Services, L.L.C. Fluid loss control pill with internal breaker and method
US20160032654A1 (en) * 2013-08-27 2016-02-04 Halliburton Energy Services, Inc. Encapsulated explosives for drilling wellbores
US9810040B2 (en) * 2014-12-23 2017-11-07 Exxonmobil Upstream Research Company Methods for inhibiting scale formation in a hydrocarbon well
US11486242B2 (en) * 2021-01-27 2022-11-01 Saudi Arabian Oil Company Methods for targeted chemical treatment of well bores
US12595407B2 (en) 2022-04-08 2026-04-07 Saudi Arabian Oil Company Radiation activated well treatment

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US4919209A (en) * 1989-01-17 1990-04-24 Dowell Schlumberger Incorporated Method for treating subterranean formations
US20020055439A1 (en) * 2000-04-07 2002-05-09 Palmer Bentley J. Scale removal
US20080149335A1 (en) * 2006-12-21 2008-06-26 Jesse Lee Activation Mechanism Applicable for Oilfield Chemicals Products
US20090044942A1 (en) * 2007-08-13 2009-02-19 Bj Services Company Cellulosic Particulates and Method of Manufacture and Use Thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10081758B2 (en) 2015-12-04 2018-09-25 Ecolab Usa Inc. Controlled release solid scale inhibitors
US10865339B2 (en) 2016-05-16 2020-12-15 Championx Usa Inc. Slow-release scale inhibiting compositions
US11142680B2 (en) 2016-12-23 2021-10-12 Championx Usa Inc. Controlled release solid scale inhibitors

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