US20080164067A1 - Method for Reducing Aqueous Content of Oil-Based Fluids - Google Patents

Method for Reducing Aqueous Content of Oil-Based Fluids Download PDF

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Publication number
US20080164067A1
US20080164067A1 US11/621,558 US62155807A US2008164067A1 US 20080164067 A1 US20080164067 A1 US 20080164067A1 US 62155807 A US62155807 A US 62155807A US 2008164067 A1 US2008164067 A1 US 2008164067A1
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water
wellbore fluid
absorbing polymer
water absorbing
oil
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Abandoned
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US11/621,558
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English (en)
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Ahmadi Tehrani
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MI LLC
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MI LLC
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Priority to US11/621,558 priority Critical patent/US20080164067A1/en
Assigned to M I LLC reassignment M I LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TEHRANI, AHMADI
Priority to EP08250049.7A priority patent/EP1944464B1/en
Priority to EA200970677A priority patent/EA018274B1/ru
Priority to MX2009007352A priority patent/MX2009007352A/es
Priority to CA002674478A priority patent/CA2674478A1/en
Priority to PCT/US2008/050564 priority patent/WO2008086385A1/en
Priority to BRPI0806254-4A priority patent/BRPI0806254A2/pt
Priority to ARP080100086A priority patent/AR064828A1/es
Publication of US20080164067A1 publication Critical patent/US20080164067A1/en
Abandoned legal-status Critical Current

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    • 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

Definitions

  • the invention relates generally to wellbore fluids, and more specifically to the removal of the aqueous content from the oil-based wellbore fluids.
  • drill bit cutting surfaces When drilling or completing wells in earth formations, various fluids typically are used in the well for a variety of reasons.
  • Common uses for well fluids include: lubrication and cooling of drill bit cutting surfaces while drilling generally or drilling-in (i.e., drilling in a targeted petroliferous formation), transportation of “cuttings” (pieces of formation dislodged by the cutting action of the teeth on a drill bit) to the surface, controlling formation fluid pressure to prevent blowouts, maintaining well stability, suspending solids in the well, minimizing fluid loss into and stabilizing the formation through which the well is being drilled, fracturing the formation in the vicinity of the well, displacing the fluid within the well with another fluid, cleaning the well, testing the well, fluid used for emplacing a packer, abandoning the well or preparing the well for abandonment, and otherwise treating the well or the formation.
  • Drilling fluids or muds typically include a base fluid (water, diesel or mineral oil, or a synthetic compound), weighting agents (most frequently barium sulfate or barite is used), emulsifiers and emulsifier systems, fluid loss additives, viscosity regulators and the like, for stabilizing the system as a whole and for establishing the desired performance properties.
  • a base fluid water, diesel or mineral oil, or a synthetic compound
  • weighting agents most frequently barium sulfate or barite is used
  • emulsifiers and emulsifier systems fluid loss additives, viscosity regulators and the like, for stabilizing the system as a whole and for establishing the desired performance properties.
  • Oil-based drilling fluids are generally used in the form of invert emulsion muds.
  • Invert emulsion fluids are employed in drilling processes for the development of oil or gas sources, as well as, in geothermal drilling, water drilling, geoscientific drilling, and mine drilling.
  • the invert emulsion fluids are conventionally utilized for such purposes as providing stability to the drilled hole, forming a thin filter cake, lubricating the drilling bore and the downhole area and assembly, and penetrating salt beds without sloughing or enlargement of the drilled hole.
  • An invert emulsion mud consists of three phases: an oleaginous phase, an aqueous phase, and a finely divided particle phase.
  • the discontinuous aqueous phase is dispersed in an external or continuous oleaginous phase with the aid of one or more emulsifiers.
  • the oleaginous phase may be a mineral or synthetic oil, diesel or crude oil, while the aqueous phase is usually calcium chloride, sodium chloride or other brine.
  • the dispersed aqueous phase has several functions.
  • the aqueous phase replaces part of the oleaginous phase, thereby building volume and reducing the total fluid cost. Further, the aqueous phase contributes to fluid density through its higher specific gravity.
  • the highly dispersed state of the aqueous phase contributes to rheology and to fluid loss control.
  • the dispersed aqueous phase also helps improve the inhibition of water-reactive shales by creating a favorable salinity balance.
  • the volume ratio of the oleaginous phase to the aqueous phase is referred to as the oil/water ratio (OWR).
  • OWR oil/water ratio
  • the OWR is commonly quoted as proportions out of a total of one hundred units, e.g. 90/10, 75/25, etc.
  • Previous attempts in the prior art to increase OWR has included dilution with the oleaginous phase, i.e. adding more oil to the oil-based drilling fluid.
  • the amount of fluid additives such as rheology and fluid loss additives and weight material, necessarily increases in order to maintain the various desirable fluid properties. Consequently, not only does dilution of the oleaginous phase increase the overall volume of the drilling fluid, but it also increases costs, inventory, and waste.
  • the present invention relates to a method for removing the aqueous content from a wellbore fluid.
  • the method may include the steps of contacting a wellbore fluid with a water absorbing polymer, where the wellbore fluid includes an invert emulsion, allowing the water absorbing polymer to interact with the wellbore fluid for a sufficient period of time so that the water absorbing polymer absorbs at least a portion of the aqueous content, and separating the water absorbing polymer containing the absorbed water from the wellbore fluid.
  • the present invention relates to a method for removing the non-emulsified aqueous content from an invert emulsion wellbore fluid in situ.
  • the method may include the steps of determining a design limit of the oil-to-water ratio for the wellbore fluid, feeding the wellbore fluid to the borehole, monitoring the oil-to-water ratio of the wellbore fluid, adding a water absorbing polymer when the oil-to-water ratio decreases below the design limit, allowing the water absorbing polymer to interact with the wellbore fluid for a sufficient period of time so that the water absorbing polymer absorbs sufficient aqueous content to return the oil-to-water ratio above the design limit, and separating the water absorbing polymer containing the absorbed water from the wellbore fluid.
  • the present invention relates to a method for removing the emulsified aqueous content from a wellbore fluid.
  • the method may include the steps of determining a desired oil-to-water ratio for the existing invert emulsion wellbore fluid, adding a sufficient amount of water absorbing polymer to the existing wellbore fluid to adjust the existing oil-to-water ratio to the desired oil-to-water ratio, allowing the water absorbing polymer to interact with the existing wellbore fluid for a sufficient period of time so that the water absorbing polymer absorbs sufficient aqueous content to adjust the existing wellbore fluid to the desired oil-to-water ratio, thereby yielding an adjusted wellbore fluid, and separating the water absorbing polymer containing the absorbed aqueous content from the adjusted wellbore fluid.
  • FIG. 1 shows a graphical representation of the absorption of fresh water over a period of time.
  • FIG. 2 shows a graphical representation of the absorption of sea water over a period of time.
  • FIG. 3 shows a graphical representation of the effect of temperature on sea water absorption over a period of time.
  • FIG. 4 shows a graphical representation of the absorption of sea water in an oil environment over a period of time.
  • FIG. 5 shows a graphical representation of the absorption of sea water in an oil environment containing an invert emulsifier over a period of time.
  • FIG. 6 shows a graphical representation of the absorption of sea water in an oil environment containing an invert emulsifier and barite over a period of time.
  • FIG. 7 shows a graphical representation of the absorption of emulsified fresh water over a period of time.
  • FIG. 8 shows a graphical representation of the absorption of emulsified brine over a period of time.
  • FIG. 9 shows a graphical representation of the absorption of non-emulsified brine, setting the percent concentration (w/w) against the water activity.
  • FIG. 10 shows a flow chart for removing aqueous content from an invert emulsion drilling fluid using a water absorbing polymer.
  • FIG. 11 shows a flow chart for removing the non-emulsified aqueous content from an invert emulsion drilling fluid when the fluid is in process.
  • FIG. 12 shows a flow chart for removing emulsified aqueous content from an invert emulsion drilling fluid using a water absorbing polymer.
  • embodiments of the invention are generally directed to a method for removing aqueous content from an oil based drilling fluid, thereby increasing the OWR.
  • water often contaminates the wellbore fluid so as to increase the total volume of the wellbore fluid and alter the OWR, as well as the concentration of salts or other wellbore additives from their initial, desired concentration.
  • excess aqueous content may be removed from a wellbore fluid by contacting the wellbore fluid with a water absorbing polymer.
  • Wellbore fluids that may be used with a water absorbing polymer in accordance with the present invention may include any invert emulsion fluids having excess water that have been collected form a wellbore, such as drilling fluids, completion fluids, workover fluids, and drill-in fluids.
  • a method 100 of removing at least a portion of the aqueous content from a wellbore fluid is depicted in FIG. 10 .
  • the wellbore fluid comprises an invert emulsion oil-based drilling fluid.
  • an invert emulsion consists of three phases: an oleaginous phase, an aqueous phase, and a finely divided particle phase.
  • the discontinuous aqueous phase is dispersed in an external or continuous oleaginous phase with the aid of one or more emulsifiers.
  • the oleaginous continuous phase is preferably selected from at least one of the following: mineral oil, synthetic oil, diesel, crude oil, and mixtures thereof.
  • the aqueous discontinuous phase is preferably selected from at least one of the following: fresh water, sea water, brine, mixture of water and water soluble organic compounds, and mixtures thereof.
  • brine refers to various salts and salt mixtures dissolved in an aqueous solution.
  • a brine of the present invention may include monovalent or/and divalent salts of inorganic or organic acids.
  • a brine of the present invention includes calcium, sodium or potassium chloride; calcium, sodium or potassium bromide, potassium or cesium formate dissolved in an aqueous solution.
  • Method 100 comprises a contacting step 110 , where a water absorbing polymer is contacted with the wellbore fluid.
  • the water absorbing polymer is preferably a water absorbing crystalline polymer capable of absorbing at least 10 times its own weight in fresh water.
  • the water absorbing polymer may include acrylamide based polymers and copolymers, starch derivatives, and combinations thereof, as well as other water absorbing polymers known in the art.
  • the absorbance capacity of the water absorbing polymers may be explained by the matix-like structure of dry water absorbing polymer particle.
  • the dry polymer may contain charged species within the matrix, such that the ionization of the polymer will cause the matrix network to open and create cavities that may absorb water by capillary action. Water absorbed into the polymer may be retained by hydrogen bonds that form between the charged species and the water.
  • the actual mechanism for water absorbance and retention may vary based on the structure of a particular water absorbing polymer.
  • polyacrylamide in the dry powdered state, contains a coiled backbone, lined with amide groups. When exposed to an aqueous solution, the amide groups dissociate into negatively charged amide ions, which may repel one another along the polymer chain.
  • the repelling amide ions thereby widen the polymer coils and allow water to move into contact with inner amide groups, further continuing the widening or welling of the polymer. Water is retained within the polymer due to hydrogen bonding between the water and the amide ions on the polymer. Because of the crosslinking that exists in these water absorbing polymers, the water absorbing polymers remain insoluble in an aqueous solution.
  • Method 100 further comprises an interacting step 120 , where the water absorbing polymer is allowed to contact the wellbore fluid for a period of time.
  • the period of time should be sufficient so that the water absorbing polymer absorbs at least a portion of the aqueous fluid from the invert emulsion.
  • the amount of time will vary depending on the application, and can be easily ascertained through representative testing. However, equilibrium has been obtained between 1 and three hours, depending on salinity as well as the state of emulsification.
  • Method 100 further comprises a separating step 130 , where the water absorbing polymer containing the absorbed water from the wellbore fluid is separated from the wellbore fluid.
  • a separating step 130 where the water absorbing polymer containing the absorbed water from the wellbore fluid is separated from the wellbore fluid.
  • This can be achieved through various filtration techniques, including passing the invert emulsion wellbore fluid containing the water absorbing polymer over appropriate sized shaker screens to remove the swollen water absorbing polymer.
  • centrifuges or hydrocylcones which work on the basis of size and density differences, may also be used to effectuate separation of the water absorbing polymer from the wellbore fluid.
  • embodiments of the invention are generally directed to a method for adjusting the OWR of the invert emulsion wellbore fluid. This may become necessary to remove excess downhole influx of water, or adjust the OWR of an existing wellbore fluid so it may meet the specifications of a particular application.
  • a method 200 for removing the non-emulsified aqueous content during the drilling process is depicted in FIG. 11 . It may become necessary to remove excess aqueous content throughout the drilling process if, for example, there is an influx of water into the wellbore or there is surface contamination of the wellbore fluid. If the water portion of the invert emulsion wellbore fluid increases, the water absorbing polymer can be added to absorb at least a portion of the aqueous content, thereby increasing the OWR. The water absorbing polymer will absorb the influx water first, and then absorb the discontinuous aqueous phase of the wellbore fluid.
  • Method 200 comprises a determining step 210 , where the design limit of the OWR for the invert emulsion wellbore fluid is determined.
  • the design limit is the minimum OWR the wellbore fluid will tolerate without adversely effecting the rheology, density, and emulsion stability of the wellbore fluid. Accordingly, the design limit will vary depending upon the particular application.
  • Method 200 further comprises a feeding step 220 , where an invert emulsion wellbore fluid is fed to the borehole.
  • the wellbore fluid is generally fed to a borehole via nozzles in a drill bit, or other methods already known in the art.
  • Method 200 further comprises a monitoring step 230 , where the OWR of the wellbore fluid is monitored. Determination of the OWR can be done by distilling the liquid part of the drilling fluid in a device called retort, or other means known in the art. The ideal OWR will vary depending upon the particular application, as will the design limit of the wellbore fluid. If the determined OWR falls below the design limit OWR, removal of the excess aqueous content becomes necessary.
  • Method 200 further comprises a contacting step 240 , where the invert emulsion drilling fluid is contacted with a water absorbing polymer through introducing the water absorbing polymer to the circulating drilling fluid in the wellbore.
  • the water absorbing polymer can be added directly to the active pit, or the water absorbing polymer may be added in the flow line carrying the invert emulsion wellbore fluid.
  • Method 200 further comprises an interacting step 250 , where the water absorbing polymer interacts with the invert emulsion drilling fluid for a sufficient period of time so that the water absorbing polymer absorbs sufficient aqueous content to return the OWR above the design limit.
  • sub-millimetric polymer granules are added to the wellbore fluid and allowed to continuously circulate within the wellbore. As the polymer granules circulate with the wellbore fluid, at least a portion of the aqueous content of the wellbore fluid will be absorbed by the polymer granules. As the polymer granules absorb the aqueous content, the polymer granules will begin to expand.
  • the size of the water absorbing polymer is important, as it affects the rate of absorption.
  • the granules should not be so small that they negatively impact the rheology of the drilling fluid.
  • the rheology of the drilling fluid may become negatively impacted if the particle size of the polymer granules become comparable to that of the drilling fluid solid constituents, i.e. the weight material and the fluid loss additive.
  • the granules should not be so small in size that they will pass through the shaker screens before they have swollen. Consequently, the particle size of the polymer granules is at least 300 micron.
  • Method 200 further comprises a separating step 260 , where the water absorbing polymer containing the absorbed aqueous content is separated from the invert emulsion drilling fluid.
  • the water absorbing polymer may removed from the invert emulsion drilling fluid. This may be done by passing the fluid through suitable sized shaker screens. Filtration of the aqueous content-bearing water absorbing polymer can be achieved after the water absorbing polymer has swelled enough to be caught by the shaker screens.
  • a method 300 for removing a portion of the emulsified aqueous content of an existing invert emulsion wellbore fluid is depicted in FIG. 12 .
  • the existing OWR of an existing invert emulsion wellbore fluid can be determined by retort, as stated above.
  • the existing OWR of an invert emulsion wellbore fluid may need to be increased so that the invert emulsion wellbore fluid meets specifications of a particular application. Consequently, it would be necessary to remove part of the discontinuous aqueous phase of the invert emulsion wellbore fluid.
  • Method 300 comprises a determination step 310 , where the desired OWR is determined.
  • the desired OWR will vary depending upon a given application. Factors considered when determining the desired OWR include the fluid density, rheology, fluid loss properties and costs.
  • Method 300 further comprises an addition step 320 , where a sufficient amount of the water absorbing polymer is added to the existing wellbore fluid to adjust the existing OWR to a desired OWR.
  • the existing wellbore fluid is held in storage, and polymer granules are added to the existing wellbore fluid.
  • the size of the polymer granules affects the rate of absorption. Because the existing wellbore fluid is held in storage, and is not actively involved in drilling a wellbore, the amount of time it takes to adjust the OWR to the desired OWR is not as critical. Consequently, larger polymer granules are preferred. While larger granules may be used, they should not be so large as to be prematurely filtered during separating step 340 . Therefore, polymer granules between 0.3 and 1.0 millimeter are most preferred
  • Method 300 further comprises an interacting step 330 , where the invert emulsion wellbore fluid interacts with the water absorbing polymer for a sufficient period of time for the water absorbing polymer to absorb sufficient aqueous content to adjust the existing OWR to the desired OWR.
  • the invert emulsion wellbore fluid is moderately agitated for the duration of the time period. The agitation should be of an adequate level to distribute the polymer granules uniformly throughout the drilling fluid, i.e. prevent separation due to density difference.
  • Method 300 further comprises a separating step 340 , where the water absorbing polymer containing the absorbed aqueous content is separated from the invert emulsion wellbore fluid. Once the desired OWR is reached, separation may be done by passing the invert emulsion wellbore fluid through suitable sized shaker screens.
  • Examples 1-3 are general demonstrations of water absorption capacity of the polymer.
  • Examples 4-6 generally show the high capacity of the polymer for removing non-emulsified water from a non-aqueous environment such as an oil-based fluid. This is analogous to surface contamination or down hole influx of water.
  • Examples 7-9 generally illustrate the ability of the polymer, dispersed in an oil phase, to extract water from an emulsified aqueous phase. This is analogous to treating an existing oil-based fluid in order to increase its OWR.
  • FIG. 1 shows the weight gain of the polymer against time of interaction between the polymer and the fresh water. The results show that the polymer absorbs more than one hundred (100) times its own weight of fresh water in two hours.
  • FIG. 2 shows the weight gain of the polymer against time of interaction between the polymer and the sea water. The results show that the polymer absorbs more than ten (10) times its own weight of sea water in two hours.
  • FIG. 3 shows the effect of a thirty (30) degree rise in temperature on sea water absorption. The higher temperature does not have a negative effect on water absorption capacity of the polymer.
  • FIG. 4 charts the weight of the absorbed sea water against time. Comparison with FIG. 2 shows that the presence of the oil does not inhibit absorption of sea water by the polymer.
  • FIG. 6 shows the weight of absorbed sea water against time. Comparison with FIGS. 4 and 5 shows that the presence of barite particles reduces water absorption by the polymer. This may be due to coverage of polymer granules with fine particles of barite. Nevertheless, the polymer is capable of absorbing seven times its own weight of sea water in three (3) hours.
  • FIG. 7 shows the weight of absorbed fresh water against time. The polymer readily absorbs fresh water, up to fourteen (14) times its own weight, even when the water is in an emulsified state.
  • a 22% (w/w) calcium chloride brine was made by dissolving 10.9 grams of calcium chloride (oilfield grade, 83.5% purity) in 30.7 mL of fresh water (equivalent to a water phase salinity of 173,887 mg/L of chloride ions, a common oilfield unit). Two and a half (2.5) grams of emulsifier was dissolved in 100 mL of mineral oil The 30.7 mL volume of 22% (w/w) calcium chloride brine was added to the oil and the mixture was subjected to high shear for thirty (30) minutes using a Hamilton Beach mixer. One gram of polymer was then added to the emulsion and the mixture was stirred gently.
  • FIG. 8 shows the weight of absorbed brine against time. This is the worst case scenario for water absorption as both salinity and emulsification reduce absorption of water by the polymer. Nevertheless, the polymer is capable of absorbing more than three times its own weight of brine from a concentrated emulsified brine phase.
  • FIG. 9 shows the percent concentration (w/w) against water activity. If the weight gain of the polymer was due to absorption of pure water, rather than brine solution, then the salt concentration of the remaining brine would have increased to 29.9%, equivalent to a water activity of about 0.64, as shown in FIG. 9 . As mentioned above, the measured water activity of the remaining brine was 0.79. Therefore, it is concluded that the polymer absorbs the salt solution rather than pure water.

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US11/621,558 2007-01-09 2007-01-09 Method for Reducing Aqueous Content of Oil-Based Fluids Abandoned US20080164067A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US11/621,558 US20080164067A1 (en) 2007-01-09 2007-01-09 Method for Reducing Aqueous Content of Oil-Based Fluids
EP08250049.7A EP1944464B1 (en) 2007-01-09 2008-01-07 Method for reducing aqueous content of oil-based fluids
EA200970677A EA018274B1 (ru) 2007-01-09 2008-01-09 Способ уменьшения содержания воды в жидкостях на нефтяной основе
MX2009007352A MX2009007352A (es) 2007-01-09 2008-01-09 Metodo para reducir el contenido acuoso de fluidos con base oleosa.
CA002674478A CA2674478A1 (en) 2007-01-09 2008-01-09 Method for reducing aqueous content of oil-based fluids
PCT/US2008/050564 WO2008086385A1 (en) 2007-01-09 2008-01-09 Method for reducing aqueous content of oil-based fluids
BRPI0806254-4A BRPI0806254A2 (pt) 2007-01-09 2008-01-09 método para reduzir o teor de água de fluidos à base de óleo
ARP080100086A AR064828A1 (es) 2007-01-09 2008-01-09 Metodo para reducir el contenido de agua en fluidos base aceite

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EP (1) EP1944464B1 (es)
AR (1) AR064828A1 (es)
BR (1) BRPI0806254A2 (es)
CA (1) CA2674478A1 (es)
EA (1) EA018274B1 (es)
MX (1) MX2009007352A (es)
WO (1) WO2008086385A1 (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120247768A1 (en) * 2009-09-30 2012-10-04 M-I Drilling Fluids Uk Limited Crosslinking agents for producing gels and polymer beads for oilfield applications
WO2014011544A1 (en) * 2012-07-09 2014-01-16 M-I L.L.C. Process for recovery of oleaginous fluids from wellbore fluids
US20150144565A1 (en) * 2013-11-27 2015-05-28 Cabot Corporation Methods to Separate Brine From Invert Emulsions Used in Drilling and Completion Fluids
US10738549B1 (en) * 2019-09-30 2020-08-11 Halliburton Energy Services, Inc. Methods to manage water influx suitable for pulsed electrical discharge drilling
WO2022119582A1 (en) * 2020-12-04 2022-06-09 Halliburton Energy Services, Inc. Hydrolysis reactant fluids for pulse power drilling

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WO2011037954A2 (en) * 2009-09-22 2011-03-31 M-I L.L.C. Invert emulsion fluids with high internal phase concentration
US9004167B2 (en) 2009-09-22 2015-04-14 M-I L.L.C. Methods of using invert emulsion fluids with high internal phase concentration

Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140747A (en) * 1960-07-27 1964-07-14 Phillips Petroleum Co Water-in-oil emulsion well fluid
US4172066A (en) * 1974-06-21 1979-10-23 The Dow Chemical Company Cross-linked, water-swellable polymer microgels
US4587319A (en) * 1983-03-18 1986-05-06 Beghin-Say S.A. Salified acrylic allyloligosaccharide copolymer, a process for preparing the copolymer, and application as a super-absorbent
US4618631A (en) * 1982-01-25 1986-10-21 American Colloid Company Production process for highly water absorbable polymer
US4635726A (en) * 1985-05-28 1987-01-13 Texaco Inc. Method for controlling lost circulation of drilling fluids with water absorbent polymers
US4777200A (en) * 1984-05-16 1988-10-11 Allied Colloids Ltd. Polymeric compositions and methods of using them
US4891969A (en) * 1988-07-07 1990-01-09 Wayland J Robert Oil/water ratio measurement
US5004552A (en) * 1990-06-14 1991-04-02 Al Yazdi Ahmed M Apparatus and method for separating water from crude oil
US5340853A (en) * 1990-09-19 1994-08-23 Chemische Fabrik Stockhausen Gmbh Polymer-based swelling and absorbing agents with an improved degradability and an improved absorption for water, aqueous solutions and body liquids and the use of said agents for the production of hygienic articles and for soil conditioning
US5610220A (en) * 1992-12-30 1997-03-11 Chemische Fabrik Stockhausen Gmbh Powder-form polymers which absorb, even under pressure, aqueous liquids and blood, a method of producing them and their use in textile articles for body-hygiene applications
US5672633A (en) * 1993-09-29 1997-09-30 Chemische Fabrik Stockhausen Gmbh Powdery polymers capable of absorbing aqueous liquids, a process for their production and their use as absorbents
US5792855A (en) * 1993-08-03 1998-08-11 Nippon Shokubai Co., Ltd. Water-absorbent resins and manufacturing methods thereof
US6074563A (en) * 1996-05-06 2000-06-13 P.G.S Holdings Ltd Dehydration of drilling fluids
US6087450A (en) * 1995-11-21 2000-07-11 Stockhausen Gmbh & Co., Kg Water-swelling polymers cross-linked with unsaturated amino alcohols, the production and use of same
US6403700B1 (en) * 1995-08-09 2002-06-11 Stockhausen Gmbh & Co. Kg Absorbing agents for water and aqueous liquids and process for their production and use
US6518224B2 (en) * 2000-01-24 2003-02-11 Robert R. Wood Drilling fluids
US20030132000A1 (en) * 2002-01-16 2003-07-17 Mano Shaarpour Method and composition for preventing or treating lost circulation
US6599989B2 (en) * 1998-03-03 2003-07-29 Nippon Skokubai Co., Ltd. Water-absorbent agents containing polycarboxylic amine chelating agents
US6750262B1 (en) * 1999-03-03 2004-06-15 Basf Aktiengesellschaft Water-absorbing, cellular, cross-linked polymers with improved distribution effect, method for their production and their use
US20040120847A1 (en) * 2002-12-24 2004-06-24 Willem Dijkhuizen Reducing the corrosivity of water-containing oil-mixtures
US20040144542A1 (en) * 2001-05-25 2004-07-29 Luisa Chiappa Process for reducing the production of water in oil wells
US20050016773A1 (en) * 2003-07-25 2005-01-27 Stepenoff G. Scott Petroleum drilling method and apparatus to cool and clean drill bit with recirculating fluid composition while reclaiming most water utilized and greatly reducing the normal consumption of water during drilling
US6983799B2 (en) * 2003-02-27 2006-01-10 Halliburton Energy Services, Inc. Method of using a swelling agent to prevent a cement slurry from being lost to a subterranean formation
US20060157245A1 (en) * 2001-05-25 2006-07-20 Eni S.P.A. Process for reducing the production of water in oil wells
US20060186056A1 (en) * 2005-02-07 2006-08-24 Catalin Ivan Apparatus for separation of water from oil-based drilling fluid and advanced water treatment
US20080200583A1 (en) * 2005-01-28 2008-08-21 Stockhausen Gmbh Water-Soluble or Water-Swellable Polymers, Particularly Water-Soluble or Water-Swellable Copolymers Made of Acrylamide and at Least One Ionic Comonomer Having a Low Residual Monomer Concentration

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4913585A (en) 1988-12-21 1990-04-03 Tricor Envirobonds, Ltd. Method of treating solids containing waste fluid
US6109350A (en) 1998-01-30 2000-08-29 Halliburton Energy Services, Inc. Method of reducing water produced with hydrocarbons from wells

Patent Citations (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140747A (en) * 1960-07-27 1964-07-14 Phillips Petroleum Co Water-in-oil emulsion well fluid
US4172066A (en) * 1974-06-21 1979-10-23 The Dow Chemical Company Cross-linked, water-swellable polymer microgels
US4618631A (en) * 1982-01-25 1986-10-21 American Colloid Company Production process for highly water absorbable polymer
US4587319A (en) * 1983-03-18 1986-05-06 Beghin-Say S.A. Salified acrylic allyloligosaccharide copolymer, a process for preparing the copolymer, and application as a super-absorbent
US4777200A (en) * 1984-05-16 1988-10-11 Allied Colloids Ltd. Polymeric compositions and methods of using them
US4635726A (en) * 1985-05-28 1987-01-13 Texaco Inc. Method for controlling lost circulation of drilling fluids with water absorbent polymers
US4891969A (en) * 1988-07-07 1990-01-09 Wayland J Robert Oil/water ratio measurement
US5004552A (en) * 1990-06-14 1991-04-02 Al Yazdi Ahmed M Apparatus and method for separating water from crude oil
US5340853A (en) * 1990-09-19 1994-08-23 Chemische Fabrik Stockhausen Gmbh Polymer-based swelling and absorbing agents with an improved degradability and an improved absorption for water, aqueous solutions and body liquids and the use of said agents for the production of hygienic articles and for soil conditioning
US5610220A (en) * 1992-12-30 1997-03-11 Chemische Fabrik Stockhausen Gmbh Powder-form polymers which absorb, even under pressure, aqueous liquids and blood, a method of producing them and their use in textile articles for body-hygiene applications
US5792855A (en) * 1993-08-03 1998-08-11 Nippon Shokubai Co., Ltd. Water-absorbent resins and manufacturing methods thereof
US5672633A (en) * 1993-09-29 1997-09-30 Chemische Fabrik Stockhausen Gmbh Powdery polymers capable of absorbing aqueous liquids, a process for their production and their use as absorbents
US6403700B1 (en) * 1995-08-09 2002-06-11 Stockhausen Gmbh & Co. Kg Absorbing agents for water and aqueous liquids and process for their production and use
US6087450A (en) * 1995-11-21 2000-07-11 Stockhausen Gmbh & Co., Kg Water-swelling polymers cross-linked with unsaturated amino alcohols, the production and use of same
US6251288B1 (en) * 1996-05-06 2001-06-26 P.G.S. Holdings Ltd. Methods of drilling a bore hole and dehydrating drilling fluids
US6074563A (en) * 1996-05-06 2000-06-13 P.G.S Holdings Ltd Dehydration of drilling fluids
US6599989B2 (en) * 1998-03-03 2003-07-29 Nippon Skokubai Co., Ltd. Water-absorbent agents containing polycarboxylic amine chelating agents
US6750262B1 (en) * 1999-03-03 2004-06-15 Basf Aktiengesellschaft Water-absorbing, cellular, cross-linked polymers with improved distribution effect, method for their production and their use
US6518224B2 (en) * 2000-01-24 2003-02-11 Robert R. Wood Drilling fluids
US20040144542A1 (en) * 2001-05-25 2004-07-29 Luisa Chiappa Process for reducing the production of water in oil wells
US20060157245A1 (en) * 2001-05-25 2006-07-20 Eni S.P.A. Process for reducing the production of water in oil wells
US20030132000A1 (en) * 2002-01-16 2003-07-17 Mano Shaarpour Method and composition for preventing or treating lost circulation
US7066285B2 (en) * 2002-01-16 2006-06-27 Halliburton Energy Services, Inc. Method and composition for preventing or treating lost circulation
US20040120847A1 (en) * 2002-12-24 2004-06-24 Willem Dijkhuizen Reducing the corrosivity of water-containing oil-mixtures
US6983799B2 (en) * 2003-02-27 2006-01-10 Halliburton Energy Services, Inc. Method of using a swelling agent to prevent a cement slurry from being lost to a subterranean formation
US20050016773A1 (en) * 2003-07-25 2005-01-27 Stepenoff G. Scott Petroleum drilling method and apparatus to cool and clean drill bit with recirculating fluid composition while reclaiming most water utilized and greatly reducing the normal consumption of water during drilling
US20080200583A1 (en) * 2005-01-28 2008-08-21 Stockhausen Gmbh Water-Soluble or Water-Swellable Polymers, Particularly Water-Soluble or Water-Swellable Copolymers Made of Acrylamide and at Least One Ionic Comonomer Having a Low Residual Monomer Concentration
US20060186056A1 (en) * 2005-02-07 2006-08-24 Catalin Ivan Apparatus for separation of water from oil-based drilling fluid and advanced water treatment

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120247768A1 (en) * 2009-09-30 2012-10-04 M-I Drilling Fluids Uk Limited Crosslinking agents for producing gels and polymer beads for oilfield applications
WO2014011544A1 (en) * 2012-07-09 2014-01-16 M-I L.L.C. Process for recovery of oleaginous fluids from wellbore fluids
US20150197998A1 (en) * 2012-07-09 2015-07-16 M-I, L.L.C. Process for recovery of oleaginous fluids from wellbore fluids
US20150144565A1 (en) * 2013-11-27 2015-05-28 Cabot Corporation Methods to Separate Brine From Invert Emulsions Used in Drilling and Completion Fluids
US11034596B2 (en) * 2013-11-27 2021-06-15 Sinomine Resources (Us) Inc. Methods to separate brine from invert emulsions used in drilling and completion fluids
US10738549B1 (en) * 2019-09-30 2020-08-11 Halliburton Energy Services, Inc. Methods to manage water influx suitable for pulsed electrical discharge drilling
WO2021066850A1 (en) * 2019-09-30 2021-04-08 Halliburton Energy Services, Inc. Methods to manage water influx suitable for pulsed electrical discharge drilling
WO2022119582A1 (en) * 2020-12-04 2022-06-09 Halliburton Energy Services, Inc. Hydrolysis reactant fluids for pulse power drilling

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