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WO1999036664A1 - Procede de formation de joints ciment dans des tuyaux de fond de trou - Google Patents

Procede de formation de joints ciment dans des tuyaux de fond de trou Download PDF

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Publication number
WO1999036664A1
WO1999036664A1 PCT/US1999/000892 US9900892W WO9936664A1 WO 1999036664 A1 WO1999036664 A1 WO 1999036664A1 US 9900892 W US9900892 W US 9900892W WO 9936664 A1 WO9936664 A1 WO 9936664A1
Authority
WO
WIPO (PCT)
Prior art keywords
present
cement
slurry
amount
cement slurry
Prior art date
Application number
PCT/US1999/000892
Other languages
English (en)
Inventor
Willroe C. Jones
Original Assignee
Downhole Solutions, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Downhole Solutions, Inc. filed Critical Downhole Solutions, Inc.
Priority to AU23216/99A priority Critical patent/AU2321699A/en
Publication of WO1999036664A1 publication Critical patent/WO1999036664A1/fr

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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
    • C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
    • C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • 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
    • E21B27/00—Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
    • E21B27/02—Dump bailers, i.e. containers for depositing substances, e.g. cement or acids
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • E21B33/134—Bridging plugs

Definitions

  • the present invention relates to a method for downhole cementing and, more particularly, to a method for forming a seal or plug of cement in a pipe disposed in an earth borehole, such as an oil well gas, gas well, water well, or the like.
  • bridge plugs or retainers that are wedged or mechanically positioned into position into the pipe, e.g., casing or tubing, to form a seal that prevents the flow of fluids below the plug from traveling up the pipe and, conversely, prevents fluids above the pipe from flowing deeper into the well.
  • a cement slurry is placed on top of the bridge plug or retainer, although in certain cases, the cement slurry can be deposited in the well at the desired location, the seal or plug being formed upon expansion and setting of the cement without the use of a mechanical bridge plug, retainer, or the like.
  • cement slurries are tailored with various chemicals that viscosity and prevent settling, even under higher temperatures, which tend to thin the slurry. Additionally, in certain cases other chemical agents to retard or prevent premature setting are employed. In general, these tailored slurries are often very difficult to mix on the surface (requiring as much as 15-20 minutes to form into uniform slurries).
  • a method of forming a cement seal or plug in a pipe disposed in an earth borehole comprising positioning a dump bailer containing a predetermined amount of cement slurry at a preselected location in a pipe disposed in an earth borehole, displacing the cement slurry from the dump bailer at the preselected location, and permitting the cement slurry to set to form a cement plug or seal and wherein the cement slurry comprises a hydraulic cement, water, an alkali or alkaline earth metal halide salt, a dispersant comprising an anionic surface-active agent of the sulfonated naphthalene type, and magnesium chloride.
  • the cement slurry can contain a silica material, such as sodium silicate, to prevent strength retrogression and, if necessary, a cement set retarding additive to permit premature setting of the cement slurry.
  • a dump bailer is used to deliver a predetermined amount of a cement slurry to a predetermined location in a pipe disposed in an earth borehole, the cement slurry being expelled or released from the dump bailer at the predetermined location, after which the dump bailer is removed from the well, the cement slurry being allowed to set at the predetermined location to form a seal or plug.
  • any dump bailer can be employed in the method of the present invention. Non-limiting examples of such dump bailers are disclosed in the patents referred to above, all of which are incorporated herein by reference for all purposes.
  • the cement slurry that is used in the method of the present invention is easy to mix; is completely slurried in about 3 minutes; does not settle; retains its integrity when discharged from the dump bailer, i.e., it resists admixing with the host fluids in the well; and is generally compatible with host fluids found in the well.
  • the cement slurry of the present invention generally comprises a hydraulic cement, water, a compatibilizing agent in the form of a suitable metal, such as a water soluble salt of an alkali or alkaline earth metal, a dispersant, and, optionally, a retarder and/or a silica material to strengthen the dispersive characteristics of the slurries.
  • Portland cement is preferred and can be, for example, one or more of the various types identified as API Classes A-H and J cements. These cements are identified and defined in "API Specifications for Material and Testing for Well
  • API Portland cements generally have a maximum particle size of about 90 microns and a specific surface (sometimes referred to as Blaine Fineness) of about 3900 cm 2 /gm.
  • a highly useful and effective cement for use in the cement slurry of the present invention comprises API Class H Portland cement mixed with water and the other additives to provide a slurry having a density of from about 11.3 to about 18.0 lbs/gal.
  • small particle size hydraulic cements consisting of particles having diameters no larger than about 30 microns and a Blaine Fineness of no less than about 6000 cm 2 /gm can be employed.
  • the water used in the cement slurries of the present invention can be water from any source, provided that it does not contain an excess of compounds that adversely react with or otherwise affect other components in the cement slurry.
  • the water is present in an amount sufficient to form a slurry of the cement, preferably a slurry that is readily pumpable. Generally, the water is present in an amount of from about 20 to about 55% by weight of dry cement in the composition.
  • a compatibilizing agent in the form of a water soluble salt of a metal such as zinc or an alkaline earth or alkali metal, preferably a halide of such a metal, is incorporated into the cement slurry in an amount of from about 5 to about 35% based on the amount of water present in the slurry.
  • the metal salt can be calcium chloride, potassium chloride, zinc chloride, or the like.
  • the compatibilizing agent is a salt that possesses greatest compatibility with the host fluid.
  • the cement slurry used in the method of the present invention also contains a dispersant in the form of an anionic surface-active agent of the sulfonated naphthalene type in admixture with magnesium chloride.
  • a dispersant in the form of an anionic surface-active agent of the sulfonated naphthalene type in admixture with magnesium chloride.
  • the sulfonated naphthalene materials used in the present invention are sulfonated aromatic-formaldehyde condensation products such as disclosed in U.S. Patent No. 3,954,677, incorporated herein by reference for all purposes.
  • One such sulfonated aromatic-formaldehyde condensation product is available under the trademark LOMAR-D, well known to those in the industry.
  • the dispersant is added in the form of a water solution (aqueous dispersant) containing the sodium salt of the sulfonated aromatic-formaldehyde condensation product and magnesium chloride.
  • aqueous dispersant containing the sodium salt of the sulfonated aromatic-formaldehyde condensation product and magnesium chloride.
  • the sulfonated aromatic-formaldehyde condensation product will be present in the aqueous dispersant in an amount of from about 88 to about 95% by weight based on the weight of water in the aqueous dispersant, the magnesium chloride being present in an amount of from about 8 to about 10% by weight of the water present in the aqueous dispersant.
  • aqueous dispersant will be added in an amount of from about 0.2 to about 2 gallons per 94 lbs. of dry cement present in the slurry.
  • the cement slurry of the present invention can contain a silica material, preferably sodium silicate, the silica material generally being present in an amount of from about 20 to about 40% of dry cement, the silica material preferably being in the form of finely ground sand, commonly referred to in the industry as cement silica.
  • a silica material preferably sodium silicate
  • the silica material generally being present in an amount of from about 20 to about 40% of dry cement
  • the silica material preferably being in the form of finely ground sand, commonly referred to in the industry as cement silica.
  • set retardant a cement set retarding agent
  • set retardants include materials such as cellulose derivatives and calcium lignosulfonates, as well as other types of lignosulfonates and set retardants, disclosed in U.S. Patent Nos. 5,355,955; 5,421,879; 5,536,311; and 5,472,051, all of which are incorporated herein by reference for all purposes.
  • a preferred set retardant is a glucoside derivative, particularly a calcium glucoheptonate, marketed as Sequelene ES- 40 by Pfanstiehl Laboratories, Inc.
  • the set retardant will be included in the cement slurry in an amount sufficient to delay or retard the setting of the cement slurry for the time period required to place the cement slurry in the predetermined location. It is well known that the thickening and set times of cement compositions (slurries) of the present type are strongly dependent upon temperature and pressure, as well as the nature of the host fluid.
  • the quantity of set retardant to be employed will be determined in advance by performing thickening time tests, as described in the above-mentioned API Specification JOA, taking into account bottom hole static temperatures; the nature of the host fluid, if any, in the well; the time for the cement slurry to be delivered to the predetermined location in the well; etc.
  • the set retardant will be present in the cement slurry in an amount of from about 0.1 to about 5% by weight of dry cement in the cement slurry.
  • Sequelene ES-40 which is generally marketed as a water solution containing 20 to 60% by weight of calcium glucoheptonate
  • up to 2.5 gallons of the Sequelene ES-40 water solution per 94 lbs. of dry cement in the cement slurry can be employed.
  • the ingredients are mixed together to form a pumpable slurry, which is then loaded, in the desired amount, into the dump bailer.
  • the dump bailer is then lowered into the pipe by means of a wireline or the like to the desired location, e.g., generally above a bridge plug retainer or the like, and the cement slurry is then released from the dump bailer.
  • the dump bailer is then removed from the pipe and the cement slurry allowed to set to form a cement seal or plug.
  • the composition usually includes 1 gal/94 lbs of dry cement Sequelene ES-40. At temperatures in excess of 250 °F, more set retardant may be necessary. However, as noted, at BHSTs of less than 175°F, generally no set retardant is required in the composition.
  • a particular feature of the method of the present invention is that the dispersant employed in the cement slurry allows a wide variation in the amount of water, which is necessary to maintain a pumpable slurry and ensure that the specific gravity of the cement slurry can be adjusted so as to be greater than that of the host fluid.
  • This is important since the host fluid encountered in the well may be of relatively high density, e.g., 15 lbs./gal, meaning that it would be necessary to reduce the amount of water and increase the amount of dry cement in the slurry in order to provide a cement slurry having a specific gravity greater than the host fluid.
  • the particular dispersant employed thus permits wide variations in the water content, thus making the method of the present invention versatile and useful in wells having widely varying characteristics, e.g., nature of the host liquid fluid, temperature, etc.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Inorganic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Un procédé de formation d'un joint dans une canalisation de fond de trou consiste à positionner une cuiller de cimentation contenant une quantité prédéterminée d'un laitier de ciment à un endroit désiré dans une canalisation située dans le fond d'un trou de forage terrestre, à déplacer le laitier de ciment de la cuiller de cimentation et à laisser durcir le laitier de ciment pour qu'il forme un joint. Le laitier de ciment est constitué d'une boue pompable contenant un ciment hydraulique; de l'eau; un sel soluble dans l'eau d'un métal sélectionné dans le groupe formé par les métaux alcalins, les métaux alcalino-terreux, le zinc, et des mélanges de ces derniers; d'un dispersant contenant un agent tensioactif anionique du naphtalène sulfoné; et de chlorure de magnésium.
PCT/US1999/000892 1998-01-15 1999-01-14 Procede de formation de joints ciment dans des tuyaux de fond de trou WO1999036664A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU23216/99A AU2321699A (en) 1998-01-15 1999-01-14 Method of forming cement seals in downhole pipes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7138798P 1998-01-15 1998-01-15
US60/071,387 1998-01-15

Publications (1)

Publication Number Publication Date
WO1999036664A1 true WO1999036664A1 (fr) 1999-07-22

Family

ID=22100974

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/000892 WO1999036664A1 (fr) 1998-01-15 1999-01-14 Procede de formation de joints ciment dans des tuyaux de fond de trou

Country Status (2)

Country Link
AU (1) AU2321699A (fr)
WO (1) WO1999036664A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844351A (en) * 1973-06-01 1974-10-29 Halliburton Co Method of plugging a well
US5346012A (en) * 1993-02-01 1994-09-13 Halliburton Company Fine particle size cement compositions and methods

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844351A (en) * 1973-06-01 1974-10-29 Halliburton Co Method of plugging a well
US5346012A (en) * 1993-02-01 1994-09-13 Halliburton Company Fine particle size cement compositions and methods

Also Published As

Publication number Publication date
AU2321699A (en) 1999-08-02

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