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WO2007011475A1 - Micro- emulsion en phase intermediaire et procede de fabrication et d'utilisation de celle-ci - Google Patents

Micro- emulsion en phase intermediaire et procede de fabrication et d'utilisation de celle-ci Download PDF

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Publication number
WO2007011475A1
WO2007011475A1 PCT/US2006/022653 US2006022653W WO2007011475A1 WO 2007011475 A1 WO2007011475 A1 WO 2007011475A1 US 2006022653 W US2006022653 W US 2006022653W WO 2007011475 A1 WO2007011475 A1 WO 2007011475A1
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WIPO (PCT)
Prior art keywords
cleaning composition
oil
performance cleaning
mpme
surfactant
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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/US2006/022653
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English (en)
Inventor
Joel F. Carpenter
Melissa S. Bennett
Joe D. Sauer
Patrick C. Hu
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Albemarle Corp
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Albemarle Corp
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Publication of WO2007011475A1 publication Critical patent/WO2007011475A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0008—Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
    • C11D17/0017—Multi-phase liquid compositions
    • C11D17/0021—Aqueous microemulsions
    • 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
    • C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/18—Hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2075—Carboxylic acids-salts thereof
    • C11D3/2079—Monocarboxylic acids-salts thereof
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2093—Esters; Carbonates

Definitions

  • the present invention relates to cleaning formulations, particularly cleaning formulations that are applicable in oil field cleaning and that are environmentally friendly. More particularly, the present invention relates to middle phase micro emulsions that are effective in removing oil- based drilling mud from rock cuttings, metal surfaces, wellbore surfaces, drilling equipment surfaces and human beings.
  • drilling fluid is * an indispensable component in the drilling process used to drill these wells.
  • Drilling fluids are required in the wellbore to cool and lubricate the drill bit, remove rock fragments, sometimes called drill cuttings, from the wellbore and transport them to the surface. Drilling fluids are also used to counterbalance formation pressure to prevent formation fluids (such as oil, gas and water) from entering the well prematurely and prevent the open (uncased) wellbore from caving in.
  • the drilling fluids used are selected based on the different drilling conditions encountered such as formation composition, etc.
  • drilling fluids used include water based, oil based, or based on synthetic materials, such as oleaginous (oil-like) materials, such as vegetable esters, poly alpha olefins, internal olefins, linear alpha olefins, synthetic paraffins, ethers, and linear alkylbenzenes, and the like.
  • Oil based and synthetic material based drilling muds are commonly used.
  • drill cuttings retrieved from the wellbore are covered with drilling mud, which often makes direct discharge of the cuttings unfeasible due to environmental regulations.
  • EPA regulations ⁇ see, CFR Part 435, Subpart A, regarding the National Pollutant Discharge Elimination System General Permit) allow offshore disposal of drill cutting in U.S. waters only if the oil levels on these cuttings is below set criteria, which is based on the chemistry of the drilling mud.
  • Similar regulations 1% retention of oil on cuttings promulgated by the OSPAR agreement (The Oslo/Paris Convention for the Protection of the Marine Environment of the North-East Atlantic) regulate the ocean disposal of cuttings in the North Sea.
  • Inverted drilling muds in addition to the oil component (which could be mineral oil, diesel oil, olefins, esters or poly alpha olefins) generally contain emulsifiers, wetting agents and clay; these components provide the needed mud rheology and physical characteristics to meet the requirements of a drilling operation.
  • oil component which could be mineral oil, diesel oil, olefins, esters or poly alpha olefins
  • the present invention relates to performance cleaning compositions comprising middle phase microemulsion (MPME) formulations that are effective at removing oil-based drilling mud from rock cuttings, metal surfaces, wellbore surfaces, drilling equipment surfaces and human beings and that are environmentally friendly.
  • the formulations comprise: (a) about 1 to about40 wt % surfactant, (b) about 0.5 to about 40 wt% of at least one co-surfactant, (c) about 0.5 to about 30 wt% electrolyte, (d) about 30 to about 99 wt% of an aqueous phase, and (e) about 0.5 to about 40 wt% oil, wherein the oil is a hydrocarbon, ester, triglyceride, or ether.
  • the formulations may further include other components such as dyes, odorants, viscosity control agents, pH control agents, biocides and the like.
  • the electrolyte comprises at least one readily biodegradable salt of an organic acid.
  • the electrolyte is a salt of formic acid, acetic acid or propionic acid.
  • the electrolyte is an organic acid salt of an alkali metal, which is selected from potassium, sodium, and lithium.
  • the oil of the MPME may be an olefin, an isoparaffin, an ester or any combinations thereof.
  • the oil includes olefins that are selected from a group that includes 1-alkenes and internal olefins.
  • the oil is a Ci 6 -Ci 8 internal olefin.
  • the oil includes one or more isoparaffins and the isoparaffins may be selected from a group that includes hydrogenated poly-alpha-olefins, highly refined hydro-treated mineral oil basestocks and any combinations thereof.
  • the oil includes one or more esters and the esters may be selected from a group that includes triglycerides, condensation products of Ci-C 1 O alcohols with fatty acids derived from animal and vegetable oils, and any combinations thereof.
  • the surfactants of the MPME may have a hydrophilic head group and a hydrophobic tail group, hi some embodiments, the head group is anionic and in other embodiments, the head group is neutral.
  • the tail group includes two hydrocarbon chains, each of which is at least five carbon atoms in length.
  • the hydrocarbon chain is no more than 10 carbon atoms in length.
  • the tail group includes a single hydrocarbon chain of at least 10 carbon atoms in length.
  • the hydrocarbon chain is no more than 20 carbon atoms in length.
  • the surfactant is an alkyl glyceryl sulfonate.
  • the MPME used in the performance compositions may include one or more co- surfactants and the co-surfactant may be selected from the group that includes C 2 to Ci 2 primary, secondary and tertiary alcohols.
  • the MPME includes one co- surfactant that is n-butanol.
  • Another aspect of the present invention relates to a method for cleaning drill fluid contaminated surfaces by contacting these surfaces with the cleaning compositions or formulation of the first and second aspects of the invention. The method is applicable to clean oil-based drilling fluids, synthetic material based drill fluids, and any combinations thereof from surfaces of pipes, casings, drill cuttings, drilling equipment, wellbore, and humans. DESCRIPTION OF THE FIGURES
  • FIGURE 1 compares the cleaning efficiency of water ( ⁇ ), BARASCRUBTM ( ⁇ ), BARAKLEENTM (A), Sample 1 (*), Sample 2 (•) and Sample 3 in removing ACCOLADETM drilling mud contaminated metal surfaces.
  • the vertical axis displays the amount of drilling mud (wt. in gm) removed by the cleaning system.
  • the horizontal axis indicates the number of cleaning cycles for a particular volume of cleaner.
  • FIGURE 2 compares the efficiency of selected cleaning regiments in removing oil from drilling cuttings.
  • the vertical axis displays the weight of oil that was extractable by pentane (PEM - Pentane Extractable Material) from cuttings that had been pre-cleaned by a selected cleaning regiment.
  • the horizontal axis identified the test drilling fluids, ACCOLADETM or INVERMULTM based, and the cleaning regiment used: no cleaning, water, BARASCRUBTM, BARAKLEENTM, Sample 115, Sample 1 or Sample 3.
  • the invention relates to middle phase microemulsion (MPME) formulations that are suitable for cleaning surfaces contaminated by oil-based drilling fluids.
  • MPME middle phase microemulsion
  • the MPME are formulated with a high water content but function as if they are an organic solvent in dissolving oil, and additionally the MPME are effective at emulsifying additional oils just like common surfactant systems do. Further, the major components of the formulations are chosen partly because of their biodegradability quality, thus making the formulations environmentally friendly.
  • Dispersions may be classified into different groups based on the size of the dispersed particles.
  • An “emulsion” is a dispersed system containing at least two immiscible liquid phases, usually water and oil, accompanied by a surfactant/emulsifying agent.
  • microemulsion denotes a colloidal emulsion, in which the colloidal particles are micelles made of a blend of surfactants and oleaginous materials.
  • the micelles are sized in the range of 1-10 nm and have little or no impact on the clarity of the microemulsion solution.
  • a micelle is an aggregate of surfactant molecules in which the hydrophilic portions of the molecules are arranged so that they are in contact with water and the hydrophobic portions are collected together so that they form a separate phase that excludes water molecules. It has been found that the solubility of a variety of hydrocarbon-based and other oleaginous substances, which are not normally very soluble in water, can be enhanced to a remarkable extent in the presence of micelles. These oleaginous substances are then incorporated into the interior of these micelles, or groups of micelles, and carried along with the carrier fluid.
  • micellar blends of surfactants and solvents can be formulated to be either oil in water, water in oil, or an equilibrium of water and oil.
  • a “middle phase” microemulsion is one that is formulated in equilibrium with both water and oil, and therefore can be dispersed in either water and oil based carrier fluids.
  • aqueous phase means the water or brine phase, which may also be buffered.
  • Biodegradability or “readily biodegradable” is an assessment of the breakdown of chemical substances by living organisms, one of the major processes that determine the fate of organic chemicals in the environment.
  • Ready biodegradability is determined under the most stringent of test conditions, using a very small amount of microbial inoculum, where the test chemical is present as the sole carbon source at low concentrations. Consequently, chemicals that are shown to pass a ready biodegradability test also are expected to rapidly degrade in wastewater treatment plants and in the natural environment.
  • pipe dope means lubricating grease for connecting the drill string.
  • pipe dope are oil based; exemplary product includes Bestolife ® 2000 and Eco-Sif.
  • hydro-treated, mineral oil basestock refers to hydrocarbonaceous materials, i.e. gas oils, vacuum oils, etc., that have been processed in the presence of a catalyst and hydrogen gas to, for example, remove impurities such as sulfur, nitrogen, and/or hydrogenate aromatics; reduce the length of hydrocarbon chains in the hydrocarbonaceous material through cracking; and other similar processes which are well-known in the hydrocarbon refining area.
  • the terms “optional” and “optionally” denote that the step or component following the terms may but need not be a part of the method or formulation.
  • BARAKLEENTM and BARASCRUBTM are trade names of Halliburton Energy Services's special cleaning solutions.
  • WELLFORMTM is Albemarle's trade name for its formate brines.
  • WELLFORMTM 13.2 is a brine of 75 wt% of potassium formate in water.
  • ACCOLADETM is the trade name of Halliburton Energy Services for a special invert mud system comprised of a unique blend of base fluids that are non-aqueous.
  • INVERMULTM is a trade name of Halliburton Energy Services for an invert drilling mud system that is formulated with INVERMULTM emulsifier.
  • INVERMULTM is a trade name of Halliburton Energy Services for an emulsifier.
  • the MPME formulation of the present invention comprises from about 1 to about 40 wt %, based on the MPME formulation, of at least one, preferably only one, surfactant.
  • the MPME formulation comprises from about 5 to about 35 wt %, on the same basis, of at least one surfactant, more preferably from about 10 to about 30 wt %, on the same basis, and most preferably from about 15 to about 25 wt %, on the same basis.
  • surfactants suitable for use herein are those capable of creating an oil-and-water microemulsion upon combination with the appropriate aqueous phase and oil.
  • the surfactant may be a single surfactant or a mixture of surfactants.
  • exemplary polyalkoxy groups include polyethoxy, polypropoxy and the like.
  • the counter cation is generally a monovalent cation, such as lithium, sodium, potassium, ammonia, and the like.
  • Surfactants in the present invention generally have one or two hydrophobic tail chains.
  • Each of the tail chains is at least about 5 carbons in length; typically, the chain is about 10 to about 18 carbons in length, and more typically about 10 to about 16 carbons in length.
  • Exemplary surfactants includes alkyl glyceryl sulfonate, sodium lauryl sulfate, sodium polyoxyethylene alkyl ether sulfate, sodium lauryl phosphate ,and alkyl sulfonates
  • the alkyl glyceryl sulfonate is either a sodium or potassium salt; e.g., AGS 12-14 P, a sodium coconut alkyl glyceryl sulfonate paste from Proctor and Gamble.
  • the MPME formulation of the present invention also comprises from about 0.5 to about 40 wt %, based on the MPME formulation, of at least one, preferably only one, oil.
  • the MPME formulation comprises from about 0.5 to about 30 wt %, on the same basis, of at least one oil, more preferably from about 1 to about 20 wt %, on the same basis, and most preferably from about 4 to about 12 wt %, on the same basis oils useful in the present invention are base oils that are deemed readily biodegradable. See, 40 CFR Part 435.
  • the MPME formulation of the present invention also comprises from about 0.5 to about 40 wt %, based on the MPME formulation, of at least one, preferably only one, co-surfactant.
  • the MPME formulation comprises from about 1 to about 30 wt %, on the same basis, of at least one surfactant, more preferably from about 2 to about 20 wt %, on the same basis, and most preferably from about 3 to about 12 wt %, on the same basis
  • Co-surfactants suitable for use in the present invention are those that modify the primary sufactants' behavior at phase interfaces and are typically non-ionic chemistries capable of hydrogen bonding.
  • Non-limiting examples of suitable co-surfactants include linear and branched alcohols and alkoxylates.
  • Preferred co-surfactants are alcohols that include, but are not limited to, C 2 -Ci 2 primary, secondary and tertiary alcohols, such as propanol, isopropanol, n-butanol, s- butanol, t-butanol, n-pentanol, n-hexanol, and the like.
  • the MPME formulation of the present invention also comprises from about 0.51 to about 30 wt %, based on the MPME formulation, of at least one, preferably only one, electrolyte.
  • the MPME formulation comprises from about 1 to about 20 wt %, on the same basis, of at least one electrolyte, more preferably from about 1 to about 15 wt %, on the same basis, and most preferably from about 2 to about 10 wt %, on the same basis.
  • the electrolytes are used to adjust the ioinic strength of the aqueous phase, thereby fine-tuning the balance of surfactant and co-surfactant in the aqueous and oleaginous phases.
  • Electrolytes suitable for use herein are organic acid salts. Organic acid salts are advantageous for this application because they are biodegradable and are free of corrosive halide anions.
  • the MPME formulation of the present invention also comprises from about 30 to about 99 wt %, based on the MPME formulation, of an aqueous phase.
  • the MPME formulation comprises from about 30 to about 80 wt %, on the same basis, of an aqueous phase, more preferably from about 40 to about 70 wt %, on the same basis.
  • the aqueous phase of the present invention is generally fresh water or brine.
  • the water can optionally be buffered to a pH of about 10, but the pH of the buffered water will depend on the particular application.
  • buffers that are suitable for use herein include Na 2 CO 3 , K 2 CO 3 , Li 2 CO 3 , NaHCO 3 , KHCO 3 , LiHCO 3 , Na 2 B 4 O 7 - 10H 2 O (Borax), HCl, NaOH, KOH, LiOH, Na 2 HPO 4 , Na 3 PO 4 , K 2 HPO 4 , K 3 PO 4 ,
  • Li 2 HPO 4 Li 3 PO 4 , and the like.
  • the MPME formulation according to the present invention comprises about 17 to about 19 wt.%, based on the MPME formulation, of a surfactant, about 4 to about 6 wt.%, on the same basis, of a co-surfactant, about 4 to about 6 wt.%, on the same basis, of a Ci 6 -Ci 8 internal olefin, about 60 to about 62 wt.%, on the same basis, buffered water, having a pH ranging from about 9 to about 11, and about 8 to about 10 wt.%, on the same basis, of WELLFORMTM 13.2 electrolyte.
  • the MPME formulation according to the present invention comprises about 17 to about 19 wt.%, based on the MPME formulation, of a surfactant, about 8 to about 10 wt.%, on the same basis, of a co-surfactant, about 4 to about 6 wt.%, on the same basis, of a Ci 6 -Ci S internal olefin, about 60 to about 62 wt.%, on the same basis, buffered water having a pH ranging from about 9 to about 11 , and about 4 to about 6 wt.%, on the same basis, of WELLFORMTM 13.2 electrolyte.
  • the MPME formulation according to the present invention comprises about 19 to about 21 wt.%, based on the MPME formulation, of a surfactant, about 5 to about 7 wt.%, on the same basis, of a co-surfactant, about 9 to about 11 wt.%, on the same basis, of a C] 6 -Ci 8 internal olefin, about 54 to about 56 wt.%, on the same basis, buffered water having a pH ranging from about 9 to about 11, and about 7 to about 9 wt.%, on the same basis, of WELLFORMTM 13.2 electrolyte.
  • the MPME formulations of the present invention can be formulated as the middle phase of a three-phased mixture comprised of oils, surfactants, co-surfactants, electrolytes and aqueous phase.
  • the middle phase is isolated and analyzed for the concentration of each of the components. Based on this analysis, a single phased middle-phase microemulsion may be directly prepared from mixing together the known ratio of the components.
  • the MPME of the invention may contain about 1 to about 40 wt% surfactants, about 0 to about40 wt% co- surfactants, about 0 to about 40 wt% oil, about 0 to about 30 wt% electrolytes, and about 0 to about 98 wt% water, all of the weight percents based on the MPME formulation.
  • the MPME of the invention contains about 15 to about 25 wt% surfactants, about 3 to about 12 wt% co-surfactants, about 3 to about 18 wt% oil, about 2 to about 15 wt% electrolytes, and about 45 to about 75 wt% water, all of the weight percents based on the MPME formulation.
  • the MPME formulation contains about 16 to about 24 wt% surfactants, about 4 to about 10 wt% co-surfactants, about 5 to about 15 wt% oil, about 3 to about 10 wt% electrolytes, and about 50 to about 65 wt% water, all of the weight percents based on the MPME formulation. Additionally, the MPME formulation can be modified to include other components such as dyes, odorants, viscosity-control agents, pH control agents and biocides without the loss of overall efficacy in the intended application.
  • the MPME formulation of the present invention may be prepared by any process or method known such as by simply shearing the components together. If the MPME formulation is prepared by shearing the components together, the shearing can be conducted in a mixer or similar apparatus under conditions that include a rotation rate equivalent to the low setting on a Hamilton Beach mixer and a time of a few minutes, e.g. 3-5 minutes.
  • the MPME formulation is prepared by first blending together the surfactants, co- surfactants, and oil, in a Hamilton Beach mixer at low setting for about two minutes to form a blended oil phase. The water, electrolyte and, optionally, a buffer are also mixed to form a premixed aqueous phase.
  • the blended oil phase is added to the premixed aqueous phase to form a MPME precursor mixture, and the precursor mixture is then sheared at speeds described above for two minutes thus forming a MPME formulation according to the present invention.
  • the term "readily biodegradable” describes a substance that can be degraded to 60 % of the theoretical amount and complete degradation within 10 days of attaining the 10% level.
  • the theoretical CO 2 release (ThCO 2 )and the theoretical oxygen demand (ThOD) can be calculated based on the organic carbon content of the test material.
  • the biodegradabilities of three components of some embodiments of the present invention have been measured, and the compounds have been found to be readily biodegradable.
  • the aerobic biodegradability of the Ci 6 -Ci S internal olefin oil component (e.g., Amodrilf 1000) used in some embodiments of the present invention was measured by the Marine Closed Bottle Method OECD 306 (1992), and the anaerobic biodegradability was measured by the Modified ISO 11734:1995 test protocol as required by EPA's NPDES general permit requirement and AmodrilflOOO met the biodegradation requirement.
  • the anaerobic biodegradability of the surfactant potassium alkyl glycerol sulfonate was measured using the Marine Closed Bottle Method OECD 306 (1992).
  • the effectiveness of the MPME formulations according to the present invention in cleaning drilling fluid contaminated metal surfaces and cuttings may be evaluated by laboratory tests. Designing such cleaning tests is within the general knowledge of those skilled in the art, and the tests should be designed to resemble cleaning situations that occur during operations.
  • the cleaning efficiency may be assessed, e.g., by determining the amount of contaminant removed from the metal surface and/or cuttings per cleaning cycle, taking into account the volume of the MPME formulation used and the surface area or weight of material cleaned. Additionally, the cleaning capacity of the MPME formulations may be evaluated by determining the contaminant loading of a fixed volume of MPME formulations once that MPME formulations can no longer remove further contaminants.
  • the efficiency of the MPME formulations of the present invention in removing oil on drill cuttings contaminated by oil-based drill mud can be evaluated by recovering any oil that remains on the cleaned cuttings; the smaller the amount recovered, the more efficient the cleaner. Further, the test protocol should include comparisons to other commercial cleaning products and water for comparative purpose. [0045]
  • the effectiveness of the MPME formulations of the present invention in cleaning drilling mud contaminated metal surfaces has been tested by a "Mock Pipe Cleaning" test, described in detail in Example 1 herein. Briefly, the test involves cleaning a metal object, e.g, a stainless steel pipe, which was pre-coated with drilling mud. The weight of the amount of drilling mud removed was recorded.
  • Example 1 Efficacy of Water in Removing ACCOLADETM Mud from a Metal Surface
  • Example 2 The experiment was performed according to the protocol stated in Example 1.
  • the tested cleaning system was water and the tested contaminant was ACCOLADETM drilling mud.
  • the result is tabulated in Table B below.
  • Leached mud is the amount of mud that was removed from the sleeve and leached into the cleaning fluid.
  • Sleeve weight before cleaning is the weight of the sleeve coated with the drilling mud (Step 5 of the Protocol in Example 1). The "weight of mud before cleaning” is calculated by subtracting the weight of the empty sleeve from total weight of the sleeve before cleaning.
  • the “weight of sleeve after cleaning” is the total weight of the sleeve and residue mud after cleaning (Step 7 of the Protocol in Example 1)
  • the “total mud loading” is calculated by adding the weight of "mud removed” from the previous cycle, the “total mud loading” from the previous cycles, and the weight of "mud added” at this cycle.
  • Example 2 Efficacy of BARAKLEENTM in Removing ACCOLADETM Drilling Fluid from a Metal Surface
  • Example 2 The experiment was performed according to the protocol stated in Example 1.
  • the tested cleaning system was BARASCRUBTM was and the tested contaminant was ACCOLADETM drilling fluid.
  • the result is tabulated in Table D below.
  • the terms in the table are similarly defined as in Example 2.
  • Example 4 Efficacy of Sample 1 in Removing ACCOLADETM Drilling Fluid from a Metal Surface
  • Example 2 The experiment was performed according to the protocol stated in Example 1.
  • the tested cleaning system was Sample 1 and the tested contaminant was ACCOLADETM.
  • the results are tabulated in Table E below. The terms in the table are defined as in Example 2.
  • Example 5 Efficacy of Sample 2 in Removing ACCOLADETM Drilling Fluid from a Metal Surface
  • Example 2 The experiment was performed according to the protocol stated in Example 1.
  • the tested cleaning system was Sample 2 and the tested contaminant was ACCOLADETM.
  • the results are tabulated in Table E below. The terms in the table are defined as in Example 2.
  • Example 6 Efficacy of Sample 3 in Removing ACCOLADETM Drilling Fluid from a Metal Surface
  • Example 2 The experiment is performed according to the protocol stated in Example 1.
  • the tested cleaning system was Sample 3 and the tested contaminant was ACCOLADETM.
  • the results are tabulated in Table G below. The terms in the table are defined as in Example 2.
  • the efficacy of selected cleaning systems in removing drilling muds from drill cuttings may be evaluated by the following protocol: 1. Take a 16 oz wide mouth glass jar. Add approximately 100 g of drill cuttings contaminated with drilling mud to the jar, then weigh again. Record the weight to the nearest 0.01 g. 2. Add 100 mL of cleaning solution to the jar. Record the volume and the weight of the added cleaning solution. Seal the jar and tape the lid down with electrical tape. 3. Place jar into the roller oven at ambient temperature. Roll for 15 min.

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Abstract

La présente invention concerne des formules de produits de nettoyage respectueux de l'environnement particulièrement applicables aux forages de puits de pétrole et de gaz. Ces formules se sont démontrées efficaces pour l'élimination de la boue de forage à base pétrolière sur les surfaces de découpe métalliques et rocheuses.
PCT/US2006/022653 2005-07-15 2006-06-09 Micro- emulsion en phase intermediaire et procede de fabrication et d'utilisation de celle-ci Ceased WO2007011475A1 (fr)

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US8650840B2 (en) 2008-03-17 2014-02-18 Boehringer Ingelheim International Gmbh Reservoir for nebulizer with a deformable fluid chamber
US8763705B2 (en) 2011-03-25 2014-07-01 Schlumberger Technology Corporation Compositions and methods for cleaning a wellbore prior to cementing
US9068108B2 (en) 2013-03-14 2015-06-30 Cesi Chemical, Inc. Methods and compositions for stimulating the production of hydrocarbons from subterranean formations
US9200192B2 (en) 2012-05-08 2015-12-01 Cesi Chemical, Inc. Compositions and methods for enhancement of production of liquid and gaseous hydrocarbons
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