EP1208282A1 - Verfahren zum injizieren von einem dichten zusatz in bohrlöchern und zusammensetzung dafür - Google Patents

Verfahren zum injizieren von einem dichten zusatz in bohrlöchern und zusammensetzung dafür

Info

Publication number
EP1208282A1
EP1208282A1 EP00945008A EP00945008A EP1208282A1 EP 1208282 A1 EP1208282 A1 EP 1208282A1 EP 00945008 A EP00945008 A EP 00945008A EP 00945008 A EP00945008 A EP 00945008A EP 1208282 A1 EP1208282 A1 EP 1208282A1
Authority
EP
European Patent Office
Prior art keywords
lost circulation
seepage control
control material
additive
ground
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.)
Withdrawn
Application number
EP00945008A
Other languages
English (en)
French (fr)
Inventor
Ban D. Green
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.)
Grinding and Sizing Co LLC
Original Assignee
Grinding and Sizing Co LLC
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 Grinding and Sizing Co LLC filed Critical Grinding and Sizing Co LLC
Publication of EP1208282A1 publication Critical patent/EP1208282A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • E21B21/003—Means for stopping loss of drilling fluid
    • 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
    • C09K8/02—Well-drilling compositions
    • C09K8/03—Specific additives for general use in well-drilling compositions
    • C09K8/035—Organic additives

Definitions

  • the invention relates to an improved additive for use in control of lost circulation, fluid loss and/or seepage loss of drilling fluid during drilling operations.
  • the additive is formed such that the additive can be incorporated into the drilling fluid with much greater speed than powdered or ground additives of similar components.
  • additives are known in the art that are used to control lost circulation or seepage in a drilling operation. While the types of additives used for this purpose range from organic products to mineral products to plastics, most of these additives are introduced into the drilling fluid as a powder. There are numerous disadvantages to the use of a powder. The primary disadvantage is that the additive is very light causing it to mix slowly with the highly viscous drilling fluid. In drilling operations, speedy incorporation of the additives into the mud and circulation down through the hole is essential and affects the profitability and occasionally the safety of the operation. To overcome this disadvantage of slow incorporation, hoppers have been designed with cyclones, Venturis and jets to enhance mixing and to attempt to pull the additives from the hopper into the fluid at a higher rate.
  • This organic material is made from cottonseed hulls in combination with cottonseed meal, bentonite, some cottonseed lint and a surface active agent.
  • these components are heated and then compressed and extruded as pellets.
  • Cremeans discloses that the advantage of using discarded cattle feed is that it avoids the steps of grinding, shredding, and pretreatment processes required when using other organic waste products.
  • the surface active ingredient in the pellet acts as a wetting agent to improve mixing time without further chemical additions.
  • the cattle pellets are relatively dense and thus require less storage space.
  • a shortcoming ofthe cattle feed is that it does not immediately break down upon contact with the mud but instead maintains its shape and structure as it is added to the mud. They only begin breakdown when they are well down the drilling hole.
  • the present invention discloses a method for creating a dense additive for use in drilling fluids as well as the composition.
  • a method of creating a dense additive from lost circulation and seepage control material for use in drilling operations includes grinding of the lost circulation and seepage control material to produce a small particle size, heating the lost circulation and seepage control material, and applying pressure to the lost circulation and seepage control material such that it densifies and is forced through apertures creating a pelletized dense additive. While many lost circulation and seepage control materials are appropriate, a preferred embodiment includes organic material as the lost circulation and seepage control material.
  • This pelletized dense additive for use in drilling operations made from a ground lost circulation and seepage control material that is compressed into a pellet has a density substantially greater than that ofthe ground lost circulation and seepage control material before being compressed.
  • a preferred embodiment includes a cellulosic material.
  • a cellulosic material includes ground wood, pine bark, fruit pomace, vegetable pomace, yellow pine, pine bark, corn cobs, peanut hulls, pecan piths, almond shell, corn cob outers, bees wings, cotton burrs, oat hulls, rice hulls, seed shells, sunflower, flax, linseed, cocoa bean, feathers, peat moss, jute, flax, mohair, wool, paper, sugar cane, bagasse, sawdust, bamboo, cork, popcorn, tapioca, and grain sorghum.
  • the pelletized dense additive while characterized by increased density, is preferably in the range of 1/8 inch to 3/4 inch for diameter and a range of 1/8 inch to 1 inch for length.
  • the density ofthe additive ranges widely according to the lost circulation and seepage control material, with the preferred density being the highest ratio of compression achievable based on the characteristics of the material. Many organic materials can be compressed to between two and three times the density ofthe ground material.
  • This invention also encompasses a method of performing drilling operations wherein a drilling fluid is circulated in a well being drilled in the ground including grinding a lost circulation and seepage control material to produce granules, heating the granules to liquify naturally occurring binding agents, pressing the heated granules through apertures such that pellets are formed that are of substantially greater density than the lost circulation and seepage control material, adding the pellets to the drilling fluid for circulation in the well.
  • the heating is typically a result ofthe friction produced during the pressing process.
  • the grinding process can also produce a small quantity of heat. With certain lost circulation and seepage control materials, additional heat input is desirable.
  • the preferred embodiment includes miiumizing the amount of heat produced by the process and adding an appropriate binding agent.
  • sources of fiber as a lost circulation and seepage control material are already in a ground form, such as sawdust.
  • the method of creating a dense additive for such a lost circulation and seepage control stock includes obtaining the ground fiber and compressing the ground fiber into a pellet such that the pellet has substantially greater density than the ground fiber before being compressed.
  • the present invention includes many advantages over traditional art. Among such advantages are an increased rate at which additives can be added to drilling fluid, reduced area required for storage and shipping, and reduced or eliminated dust emission.
  • a characteristic ofthe present invention is that the dense additive immediately begins to hydrate on contact with the drilling fluid. With the quick hydration, the dense additive promptly disperses such that the additive is uniformly distributed through the drilling fluid as the drilling fluid is pumped down the hole.
  • a preferred embodiment includes distributing the dense additive through the drilling fluid using a traditional hopper known in the art for mixing non-dense or traditional additives.
  • a typical hopper will have an outlet diameter in the range of 4-6 inches. The pellets are of a size to easily and compactly flow through the outlet.
  • the hopper creates a mixing effect to contact the dense additive with the fluid.
  • the pellets can be added to the drilling fluid without the use of a hopper. In this case, the pellets will hydrate as they come into contact with the drilling fluid and will immediately break down into fibers or other lost circulation and seepage control material, but it will take longer for the mixing action of pumping the drilling fluid into the hole to uniformly distribute the fibers throughout the fluid.
  • the additive is readily available to perform its function after being mixed with the drilling fluid at the surface and the rheological properties of the fluid at the surface are consistent with the properties down hole.
  • One of the advantages of use of the densified additive is the substantial or complete reduction of dust during addition to the drilling fluid.
  • Traditional powders added through a hopper create volumes of dust which create a hazard to the environment and to the working personnel. Certain areas, such as the North Sea, have stringent regulations on dust.
  • the use ofthe densified additive results in a virtually dust-free lost circulation and seepage control additive.
  • Traditional powder or finely-ground additives, particularly cellulosic additives have a maximum speed at which they can be introduced into the mud or drilling fluid. This rate of addition is related to the additive's angle of repose that impacts the speed at which the additive can be discharged.
  • the current invention is directed toward reducing the angle of repose ofthe additive to allow the material to flow faster.
  • the angle of repose relates to how a material will stack and thus relates to the speed at which it will flow.
  • the angle of repose is reduced allowing the same amount of material to be added to drilling fluid in substantially less time.
  • the pellets can be made in a variety of shapes and sizes. The preferred size ofthe pellet depends upon the particular application, such as the diameter ofthe outlet ofthe hopper, the materials used to create the pellets and stacking behavior of specific shapes and sizes.
  • the pellets can range from very small dense granules and dense flakes up to several inches.
  • a preferred size is a pellet from 1/8 inch up to 3/4 inch in diameter with a length between 1/8 inch and 1 inch.
  • Any apparatus useful for forcing material through apertures can be employed in this invention.
  • a preferred embodiment includes a belt drive pellet mill, such as the commercially available Ace Pellet Mill from Koppers of Muncy, Pennsylvania. This traditional pellet mill includes a feed screw forcing the material into a conditioner chamber. Steam can be injected when necessary into the feeder section or the conditioning chamber. A roll assembly forces the material through a die at the end of the conditioning chamber. Capacity is based in part on hole size ofthe pellet die. The force generated by such a pellet mill is generally sufficient to achieve maximum or optimum compressibility ofthe ground material.
  • the heat generated as a result of the friction is generally sufficient to release oils or binders of those materials containing such components without the addition of heat.
  • Other methods of compressing the ground material can also be used.
  • the grinding and compressing processes can also be performed in one apparatus.
  • the lost circulation and seepage control material useful for the present invention includes any material that performs the function of a lost circulation additive and/or a seepage control agent. At least one ofthe lost circulation and seepage control materials should be somewhat compressible to allow the pellet formed from such material to be denser than the lost circulation and seepage control material prior to compression.
  • organic materials useful as lost circulation and seepage control material in this invention include cellulosic products such as ground wood, pine bark, pomace or pulp of fruits and/or vegetables, yellow pine, pine bark, corn cobs, peanut hulls, which is also a carrier for insecticides, pecan piths, almond shell, corn cob outers, bees wings, cotton burrs, kenaf, sillage, oat hulls, rice hulls.
  • cellulosic products such as ground wood, pine bark, pomace or pulp of fruits and/or vegetables, yellow pine, pine bark, corn cobs, peanut hulls, which is also a carrier for insecticides, pecan piths, almond shell, corn cob outers, bees wings, cotton burrs, kenaf, sillage, oat hulls, rice hulls.
  • organic materials include seed shells, sunflower, flax, linseed, cocoa bean, feathers, peat moss, jute, flax, mohair, wool, paper, sugar cane, bagasse, sawdust, bamboo, cork, popcorn, tapioca, and grain sorghum.
  • organic materials useful as lost circulation additives are also appropriate for this invention including carrageenan guam, guar gum, and other soluble gums.
  • Organic materials frequently contain natural binders such as lignin sulfonates, wood sugar, oils or other binding agents.
  • binders such as lignin sulfonates, wood sugar, oils or other binding agents.
  • To create the dense additive the material is exposed to friction through a grinding process to produce a fine material. This ground material is then subjected to pressure that forces the material with its oil through small openings or aperture to create pellets. The process of pressing produces heat that, in turn, releases oils and other readily liquified components ofthe material. These oils and other materials act to bind the material such that it is maintained as a pellet.
  • oil or other binder can be added to the lost circulation and seepage control materials.
  • additional heat can be input.
  • the pellet can be formed of one or more additives effective as lost circulation additives or seepage control agents.
  • the step of applying friction to produce a fine material can produce material of various sizes such that the pore openings of the permeable formation are effectively plugged without adverse effects.
  • the particle distribution in the drilling fluid resulting from the pellet ofthe invention not only ensures an even mix of additive, but an even mix of various sizes of particles of additive should a mix of granule sizes be desirable.
  • mineral components are readily available, such as calcium carbonate, mica, diatomaceous earth, Fuller's earth and other silicates, activated charcoal, bauxite, alumina gel, graphite, gilsonite and the like. Such materials are frequently provided in fiber or ground form. Carbonate may be used alone or in combination with other desirable additives. The effect of adding carbonate to organic additives is an improved acid solubility. This also results in a pellet of increased density. Also useful are plastics.
  • a substantial increase in density is observed between the lost circulation and seepage control materials useful in this invention and the dense additive.
  • a typical example includes a cellulosic additive with a density of 10 lbs/cf. Upon pelletizing this additive with mica, the resulting density is about 17 lbs/cf.
  • Substantial greater density is defined as a non-trivial increase in density as compared to the density ofthe raw materials used to create the denser additive.
  • a component such as mica would increase the density ofthe mixture ofthe raw materials
  • compression into a pellet substantially increases the density of the mixture.
  • the increase in density is directly related to the size and shape of the particles being compressed and the nature of the material.
  • the dense additive can also include insecticides, biocides or other biological operatives to reduce susceptibility to various types of degradation or to repel pests.
  • insecticides biocides or other biological operatives to reduce susceptibility to various types of degradation or to repel pests.
  • one of the advantages to this invention is to use agricultural byproducts as a lost circulation and seepage control material thus miiiimizing what would otherwise be a waste product
  • some agricultural products and other lost circulation and seepage control materials useful to this invention are provided in a ground form.
  • the method of creating a dense additive from such a lost circulation and seepage control stock includes obtaining the ground lost circulation and seepage control material. Obtaining the material in ground form as opposed to grinding the material is also encompassed within this invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Earth Drilling (AREA)
  • Processing Of Solid Wastes (AREA)
  • Disintegrating Or Milling (AREA)
  • Fertilizers (AREA)
EP00945008A 1999-07-26 2000-06-29 Verfahren zum injizieren von einem dichten zusatz in bohrlöchern und zusammensetzung dafür Withdrawn EP1208282A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US360558 1989-06-02
US36055899A 1999-07-26 1999-07-26
PCT/US2000/017982 WO2001007750A1 (en) 1999-07-26 2000-06-29 Method for injecting dense additive into drilling wells and composition therefore

Publications (1)

Publication Number Publication Date
EP1208282A1 true EP1208282A1 (de) 2002-05-29

Family

ID=23418511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00945008A Withdrawn EP1208282A1 (de) 1999-07-26 2000-06-29 Verfahren zum injizieren von einem dichten zusatz in bohrlöchern und zusammensetzung dafür

Country Status (9)

Country Link
EP (1) EP1208282A1 (de)
CN (1) CN1364211A (de)
AU (1) AU5900900A (de)
BR (1) BR0012724A (de)
CA (1) CA2380237A1 (de)
MX (1) MXPA02000956A (de)
NO (1) NO20020385L (de)
RU (1) RU2241730C2 (de)
WO (1) WO2001007750A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040063588A1 (en) * 2002-09-30 2004-04-01 Grinding & Sizing Co., Inc. Delivery system for drilling fluid dispersible additive tablet and associated methods
CA2452861C (en) * 2003-12-12 2011-07-12 Grinding & Sizing Co., Inc. Method of use and composition of pomace additive
JP6451160B2 (ja) * 2014-09-09 2019-01-16 東洋製罐グループホールディングス株式会社 加水分解性樹脂粒子からなる粉体
JP6062986B2 (ja) 2015-03-20 2017-01-18 デクセリアルズ株式会社 濾過助剤、及び濾過処理方法
JP6109225B2 (ja) 2015-03-30 2017-04-05 デクセリアルズ株式会社 水浄化剤、及び水浄化方法
JP6133348B2 (ja) 2015-03-30 2017-05-24 デクセリアルズ株式会社 水浄化剤、水浄化剤の製造方法、及び水浄化方法
US10336930B2 (en) * 2016-12-19 2019-07-02 Saudi Arabian Oil Company Date tree waste-based binary fibrous mix for moderate to severe loss control
RU2681714C2 (ru) * 2017-07-17 2019-03-12 Общество с ограниченной ответственностью "БурениеСервис" Способ получения эрозионной буферной жидкости
US11125046B2 (en) * 2019-12-10 2021-09-21 Saudi Arabian Oil Company Deploying wellbore patch for mitigating lost circulation
CN113898313B (zh) * 2021-10-13 2023-05-30 中石化石油工程技术服务有限公司 页岩气水平井油基钻井液防塌堵漏施工方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4217965A (en) 1979-08-21 1980-08-19 Cremeans Jim G Method for preventing fluid loss during drilling
US4428844A (en) * 1981-06-29 1984-01-31 The Sherwin-Williams Company Compacted lost circulation material
US5147852A (en) * 1989-10-16 1992-09-15 Venture Innovations, Inc. Reduction of seepage losses in well working compositions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0107750A1 *

Also Published As

Publication number Publication date
NO20020385D0 (no) 2002-01-24
RU2241730C2 (ru) 2004-12-10
AU5900900A (en) 2001-02-13
NO20020385L (no) 2002-01-24
CN1364211A (zh) 2002-08-14
WO2001007750A1 (en) 2001-02-01
BR0012724A (pt) 2002-05-28
CA2380237A1 (en) 2001-02-01
MXPA02000956A (es) 2002-09-18

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