CA2380237A1 - Method for injecting dense additive into drilling wells and composition therefor - Google Patents
Method for injecting dense additive into drilling wells and composition therefor Download PDFInfo
- Publication number
- CA2380237A1 CA2380237A1 CA002380237A CA2380237A CA2380237A1 CA 2380237 A1 CA2380237 A1 CA 2380237A1 CA 002380237 A CA002380237 A CA 002380237A CA 2380237 A CA2380237 A CA 2380237A CA 2380237 A1 CA2380237 A1 CA 2380237A1
- Authority
- CA
- Canada
- 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.)
- Abandoned
Links
- 239000000654 additive Substances 0.000 title claims abstract description 80
- 230000000996 additive effect Effects 0.000 title claims abstract description 56
- 238000005553 drilling Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000000203 mixture Substances 0.000 title abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 82
- 239000012530 fluid Substances 0.000 claims abstract description 31
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 6
- 239000008188 pellet Substances 0.000 claims description 39
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 10
- 239000011368 organic material Substances 0.000 claims description 10
- 240000006240 Linum usitatissimum Species 0.000 claims description 9
- 235000004431 Linum usitatissimum Nutrition 0.000 claims description 9
- 240000008042 Zea mays Species 0.000 claims description 9
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 9
- 235000005822 corn Nutrition 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 8
- 239000008187 granular material Substances 0.000 claims description 8
- 235000010204 pine bark Nutrition 0.000 claims description 6
- 244000144725 Amygdalus communis Species 0.000 claims description 4
- 235000011437 Amygdalus communis Nutrition 0.000 claims description 4
- 240000007594 Oryza sativa Species 0.000 claims description 4
- 235000007164 Oryza sativa Nutrition 0.000 claims description 4
- 235000020224 almond Nutrition 0.000 claims description 4
- 235000009566 rice Nutrition 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- 241000609240 Ambelania acida Species 0.000 claims description 3
- 235000017060 Arachis glabrata Nutrition 0.000 claims description 3
- 244000105624 Arachis hypogaea Species 0.000 claims description 3
- 235000010777 Arachis hypogaea Nutrition 0.000 claims description 3
- 235000018262 Arachis monticola Nutrition 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 3
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 3
- 244000068645 Carya illinoensis Species 0.000 claims description 3
- 235000009025 Carya illinoensis Nutrition 0.000 claims description 3
- 240000000491 Corchorus aestuans Species 0.000 claims description 3
- 235000011777 Corchorus aestuans Nutrition 0.000 claims description 3
- 235000010862 Corchorus capsularis Nutrition 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 3
- 244000020551 Helianthus annuus Species 0.000 claims description 3
- 235000003222 Helianthus annuus Nutrition 0.000 claims description 3
- 241000257303 Hymenoptera Species 0.000 claims description 3
- 240000003183 Manihot esculenta Species 0.000 claims description 3
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 claims description 3
- 244000046052 Phaseolus vulgaris Species 0.000 claims description 3
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims description 3
- 244000082204 Phyllostachys viridis Species 0.000 claims description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 3
- 235000005018 Pinus echinata Nutrition 0.000 claims description 3
- 235000013264 Pinus jeffreyi Nutrition 0.000 claims description 3
- 235000016013 Pinus leiophylla var chihuahuana Nutrition 0.000 claims description 3
- 240000007320 Pinus strobus Species 0.000 claims description 3
- 240000000111 Saccharum officinarum Species 0.000 claims description 3
- 235000007201 Saccharum officinarum Nutrition 0.000 claims description 3
- 235000015505 Sorghum bicolor subsp. bicolor Nutrition 0.000 claims description 3
- 235000011684 Sorghum saccharatum Nutrition 0.000 claims description 3
- 244000062793 Sorghum vulgare Species 0.000 claims description 3
- 235000009470 Theobroma cacao Nutrition 0.000 claims description 3
- 244000299461 Theobroma cacao Species 0.000 claims description 3
- 241000482268 Zea mays subsp. mays Species 0.000 claims description 3
- 239000010905 bagasse Substances 0.000 claims description 3
- 239000011425 bamboo Substances 0.000 claims description 3
- 239000007799 cork Substances 0.000 claims description 3
- 235000013399 edible fruits Nutrition 0.000 claims description 3
- 210000003746 feather Anatomy 0.000 claims description 3
- 235000004426 flaxseed Nutrition 0.000 claims description 3
- 235000013490 limbo Nutrition 0.000 claims description 3
- 210000000050 mohair Anatomy 0.000 claims description 3
- 235000020232 peanut Nutrition 0.000 claims description 3
- 239000003415 peat Substances 0.000 claims description 3
- -1 sawdust Substances 0.000 claims description 3
- 235000013311 vegetables Nutrition 0.000 claims description 3
- 210000002268 wool Anatomy 0.000 claims description 3
- 240000000797 Hibiscus cannabinus Species 0.000 claims description 2
- 239000005416 organic matter Substances 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 8
- 239000000047 product Substances 0.000 abstract description 8
- 239000006227 byproduct Substances 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 9
- 239000000428 dust Substances 0.000 description 9
- 235000019198 oils Nutrition 0.000 description 9
- 238000007792 addition Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 241000283690 Bos taurus Species 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 235000012343 cottonseed oil Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010348 incorporation Methods 0.000 description 3
- 239000010445 mica Substances 0.000 description 3
- 229910052618 mica group Inorganic materials 0.000 description 3
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000002917 insecticide Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920002907 Guar gum Polymers 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- SRBFZHDQGSBBOR-LECHCGJUSA-N alpha-D-xylose Chemical compound O[C@@H]1CO[C@H](O)[C@H](O)[C@H]1O SRBFZHDQGSBBOR-LECHCGJUSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000003139 biocide Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000679 carrageenan Substances 0.000 description 1
- 235000010418 carrageenan Nutrition 0.000 description 1
- 229940113118 carrageenan Drugs 0.000 description 1
- 229920001525 carrageenan Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000006259 organic additive Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- 229960003487 xylose Drugs 0.000 description 1
- UHVMMEOXYDMDKI-JKYCWFKZSA-L zinc;1-(5-cyanopyridin-2-yl)-3-[(1s,2s)-2-(6-fluoro-2-hydroxy-3-propanoylphenyl)cyclopropyl]urea;diacetate Chemical compound [Zn+2].CC([O-])=O.CC([O-])=O.CCC(=O)C1=CC=C(F)C([C@H]2[C@H](C2)NC(=O)NC=2N=CC(=CC=2)C#N)=C1O UHVMMEOXYDMDKI-JKYCWFKZSA-L 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The present invention discloses method and composition of improved additives for use in control of lost circulation, fluid loss and/or seepage loss of drilling fluid during drilling operations. In particular, the additive is formed such that the additive can be incorporated into the drilling fluid wi th much greater speed than powdered or ground additives of similar components. A dense additive is created from lost circulation and seepage control material for use in drilling operations. The steps to create this dense additive include grinding of the lost circulation and seepage control material to produce a small particle size 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. Heating the ground lost circulation and seepage control material, which can release oils or other binding components, is a typical byproduct of the process of forcing the ground product through the apertures.
Description
METHOD FOR INJECTING DENSE ADDITIVE
INTO DRILLING WELLS AND COMPOSITION THEREFORE
BACKGROUND OF THE INVENTION
Field of the Invention 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.
In particular, the additive is formed such that the additive can be incorporated into the drilling fluid with S much greater speed than powdered or ground additives of similar components.
Description of the Prior Art Various 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 afl'ects 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. In spite of the improvement in technology, mixing is still relatively slow. The flow through the cyclones is slow, clogging occurs, and dust becomes a problem. In certain areas of the world where a zero emission standard is in place, dust is a particular problem. Regardless of the level of emission standards, dust creates a hazard for the workers.
Another problem of traditional powdered additives arises due to the general change in drilling operations. There is a trend toward drilling in deeper water with bigger rigs thus requiring larger volumes of mud. The muds being used tend to be more expensive muds and synthetic oils emphasizing the need for lost circulation and seepage control additives. These factors also create a need for larger volume of additives.
However, storage space, particularly on an offshore rig, is a limiting factor.
S In the search for a better additive, huge numbers of organic substances have been tested for their efficiency as lost circulation and seepage control agents. In US 4,217,965 issued to Jim G. Cremeans, it is disclosed that discarded cattle feed can be used as an additive. This organic material is made from cottonseed hulls in combination with cottonseed meal, bentonite, some cottonseed lint and a surface active agent.
To make feed for the cattle, 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 of the 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.
There is a need to provide additives in a form that minimizes space required for storage and/or shipping. There is a need to provide additives in a form which mixes with the drilling fluid at substantially faster speeds. There is a need for a low or no-dust alternative for delivery ofthe additives to the drilling fluid. It is an object and a goal of this invention to meet these and other needs. It is an object and a goal of this invention to provide an additive that is quickly and efficiently distributed throughout the drilling fluid upon introduction. These and other objects of the invention will appear to one skilled in the art as the description thereof proceeds.
BRIEF SUMMARY OF THE INVENTION
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 of the ground lost circulation and seepage control material before being compressed.
Ofthe organic lost circulation and seepage control materials available to produce the dense additive, a preferred embodiment includes a cellulosic material. In particular, one or more ofthe following in combination are preferred: 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 buns, 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 of the 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 of the fiiction 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.
In the situation where naturally occurring binding agents are not present in the lost circulation and seepage control material, the preferred embodiment includes minimizing the amount of heat produced by the process and adding an appropriate binding agent.
Frequently, 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 structure and method of the present invention as well as other features, advantages, benefits and objects thereof over other structures and methods known in the art can be better understood with reference to the detailed description which follows.
DETAILED DESCRIPTION OF THE INVENTION
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 of the 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. As with the non-dense additives known in the art, the hopper creates a mixing effect to contact the dense additive with the fluid.
When necessary, 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. Although not uniform when added in this manner, 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 of the 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. While previous attempts to increase speed of introduction have focused on the design of the hopper, including varying outlet size, and the addition of cyclones and other physical aids, the current invention is directed toward reducing the angle of repose of the 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. By increasing density of the additive, 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 of the pellet depends upon the particular application, such as the diameter of the outlet of the 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 of the pellet die. The force generated by such a pellet mill is generally sufficient to achieve maximum or optimum compressibility of the ground material. Also, 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. Likewise, it is encompassed within the invention that 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 of the 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. Some of the 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 andlor vegetables, yellow pine, pine bark, corn cobs, peanut hulls, which is also a Garner for insecticides, pecan piths, almond shell, corn cob outers, bees wings, cotton buns, kenaf, sillage, oat hulls, rice hulls. Other representative 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. Many assorted 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. With most organic materials useful as additives, 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 of the material. These oils and other materials act to bind the material such that it is maintained as a pellet. When inorganic materials alone are used or when insufficient oil is present for binding of the pellets, oil or other binder can be added to the lost circulation and seepage control materials. Likewise, in cases where the oil contained within the material is of a higher melting point, additional heat can be input.
The pellet can be formed of one or more additives effective as lost circulation additives or seepage control agents. Also, the step of applying fi-iction 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. Thus, the particle distribution in the drilling fluid resulting from the pellet of the 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.
Among the inorganic materials usefizl in this invention, 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 usefi~l 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 Ibs/cf. Upon pelletizing this additive with mica, the resulting density is about 17 Ibs/cf. Substantial greater density is defined as a non-trivial increase in density as compared to the density of the raw materials used to create the denser additive. Thus, while the addition of a component such as mica would increase the density of the mixture of the 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. Thus, for example, increasing of density from 10 lbs/cf to 11 lbs/cf for a specific material can be a substantial increase in density creating a faster flow of the material out of the hopper with reduction of dust. Preferred materials for use in the invention include those which have low density and are highly compressible. In addition to the advantages listed above relating to speed of incorporation, such low density materials can be highly compressed resulting in a product which requires far less space for storage.
For example, corn cobs can be compressed into a pellet approximately double the density of corn cobs in ground form.
From the foregoing it will be seen that this invention is one well adapted to attain all ofthe ends and objects hereinabove set forth, together with other advantages which are obvious and which are inherent to the apparatus and structure.
It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations. This is contemplated by and is within the scope of the claims.
Because many possible embodiments may be made of the invention without departing from the scope thereof, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense. For example, the dense additive can also include insecticides, biocides or other biological operatives to reduce susceptibility to various types of degradation or to repel pests. While one of the advantages to this invention is to use agricultural byproducts as a lost circulation and seepage control material thus minimizing what would otherwise be a waste product, some agricultural products and other lost circulation and seepage control materials usefixl 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.
INTO DRILLING WELLS AND COMPOSITION THEREFORE
BACKGROUND OF THE INVENTION
Field of the Invention 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.
In particular, the additive is formed such that the additive can be incorporated into the drilling fluid with S much greater speed than powdered or ground additives of similar components.
Description of the Prior Art Various 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 afl'ects 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. In spite of the improvement in technology, mixing is still relatively slow. The flow through the cyclones is slow, clogging occurs, and dust becomes a problem. In certain areas of the world where a zero emission standard is in place, dust is a particular problem. Regardless of the level of emission standards, dust creates a hazard for the workers.
Another problem of traditional powdered additives arises due to the general change in drilling operations. There is a trend toward drilling in deeper water with bigger rigs thus requiring larger volumes of mud. The muds being used tend to be more expensive muds and synthetic oils emphasizing the need for lost circulation and seepage control additives. These factors also create a need for larger volume of additives.
However, storage space, particularly on an offshore rig, is a limiting factor.
S In the search for a better additive, huge numbers of organic substances have been tested for their efficiency as lost circulation and seepage control agents. In US 4,217,965 issued to Jim G. Cremeans, it is disclosed that discarded cattle feed can be used as an additive. This organic material is made from cottonseed hulls in combination with cottonseed meal, bentonite, some cottonseed lint and a surface active agent.
To make feed for the cattle, 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 of the 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.
There is a need to provide additives in a form that minimizes space required for storage and/or shipping. There is a need to provide additives in a form which mixes with the drilling fluid at substantially faster speeds. There is a need for a low or no-dust alternative for delivery ofthe additives to the drilling fluid. It is an object and a goal of this invention to meet these and other needs. It is an object and a goal of this invention to provide an additive that is quickly and efficiently distributed throughout the drilling fluid upon introduction. These and other objects of the invention will appear to one skilled in the art as the description thereof proceeds.
BRIEF SUMMARY OF THE INVENTION
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 of the ground lost circulation and seepage control material before being compressed.
Ofthe organic lost circulation and seepage control materials available to produce the dense additive, a preferred embodiment includes a cellulosic material. In particular, one or more ofthe following in combination are preferred: 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 buns, 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 of the 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 of the fiiction 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.
In the situation where naturally occurring binding agents are not present in the lost circulation and seepage control material, the preferred embodiment includes minimizing the amount of heat produced by the process and adding an appropriate binding agent.
Frequently, 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 structure and method of the present invention as well as other features, advantages, benefits and objects thereof over other structures and methods known in the art can be better understood with reference to the detailed description which follows.
DETAILED DESCRIPTION OF THE INVENTION
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 of the 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. As with the non-dense additives known in the art, the hopper creates a mixing effect to contact the dense additive with the fluid.
When necessary, 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. Although not uniform when added in this manner, 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 of the 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. While previous attempts to increase speed of introduction have focused on the design of the hopper, including varying outlet size, and the addition of cyclones and other physical aids, the current invention is directed toward reducing the angle of repose of the 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. By increasing density of the additive, 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 of the pellet depends upon the particular application, such as the diameter of the outlet of the 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 of the pellet die. The force generated by such a pellet mill is generally sufficient to achieve maximum or optimum compressibility of the ground material. Also, 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. Likewise, it is encompassed within the invention that 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 of the 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. Some of the 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 andlor vegetables, yellow pine, pine bark, corn cobs, peanut hulls, which is also a Garner for insecticides, pecan piths, almond shell, corn cob outers, bees wings, cotton buns, kenaf, sillage, oat hulls, rice hulls. Other representative 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. Many assorted 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. With most organic materials useful as additives, 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 of the material. These oils and other materials act to bind the material such that it is maintained as a pellet. When inorganic materials alone are used or when insufficient oil is present for binding of the pellets, oil or other binder can be added to the lost circulation and seepage control materials. Likewise, in cases where the oil contained within the material is of a higher melting point, additional heat can be input.
The pellet can be formed of one or more additives effective as lost circulation additives or seepage control agents. Also, the step of applying fi-iction 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. Thus, the particle distribution in the drilling fluid resulting from the pellet of the 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.
Among the inorganic materials usefizl in this invention, 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 usefi~l 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 Ibs/cf. Upon pelletizing this additive with mica, the resulting density is about 17 Ibs/cf. Substantial greater density is defined as a non-trivial increase in density as compared to the density of the raw materials used to create the denser additive. Thus, while the addition of a component such as mica would increase the density of the mixture of the 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. Thus, for example, increasing of density from 10 lbs/cf to 11 lbs/cf for a specific material can be a substantial increase in density creating a faster flow of the material out of the hopper with reduction of dust. Preferred materials for use in the invention include those which have low density and are highly compressible. In addition to the advantages listed above relating to speed of incorporation, such low density materials can be highly compressed resulting in a product which requires far less space for storage.
For example, corn cobs can be compressed into a pellet approximately double the density of corn cobs in ground form.
From the foregoing it will be seen that this invention is one well adapted to attain all ofthe ends and objects hereinabove set forth, together with other advantages which are obvious and which are inherent to the apparatus and structure.
It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations. This is contemplated by and is within the scope of the claims.
Because many possible embodiments may be made of the invention without departing from the scope thereof, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense. For example, the dense additive can also include insecticides, biocides or other biological operatives to reduce susceptibility to various types of degradation or to repel pests. While one of the advantages to this invention is to use agricultural byproducts as a lost circulation and seepage control material thus minimizing what would otherwise be a waste product, some agricultural products and other lost circulation and seepage control materials usefixl 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.
Claims (17)
1. A method of creating a dense additive from lost circulation and seepage control material for use in drilling operations comprising the steps of:
grinding of untreated lost circulation and seepage control material to a small particle size;
heating the lost circulation and seepage control material;
applying pressure to the lost circulation and seepage control material such that it densifies and is forced through apertures to create pelletized dense additive.
grinding of untreated lost circulation and seepage control material to a small particle size;
heating the lost circulation and seepage control material;
applying pressure to the lost circulation and seepage control material such that it densifies and is forced through apertures to create pelletized dense additive.
2. The method of claim 1 wherein the lost circulation and seepage control material comprises an organic material.
3. A pelletized dense additive for use in drilling operations comprising a ground untreated lost circulation and seepage control material that is compressed into a pellet, said pellet having a density substantially greater than that of the ground lost circulation and seepage control material.
4. The pelletized dense additive of claim 3 wherein the lost circulation and seepage control material is organic matter.
5. The pelletized dense additive of claim 4 wherein the lost circulation and seepage control material is a cellulosic material.
6. The pelletized dense additive of claim 3 wherein the lost circulation and seepage control material is selected from the group substantially consisting of 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, kenaf, sillage, 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, grain sorghum, and combinations of the same.
7. The pelletized dense additive of claim 3 wherein the pellets have a diameter substantially in the range of 1/8 inch to 3/4 inch and a length substantially in the range of 1/8 inch to 1 inch.
8. The pelletized dense additive of claim 3 wherein the pellets have a density that is between two and 3 times greater than the density of the ground lost circulation and seepage control material.
9. A method of performing drilling operations wherein a drilling fluid is circulated in a well being drilled in the ground comprising the steps of:
grinding untreated lost circulation and seepage control material to produce granules, heating the granules to liquify naturally occuring binding agents; and pressing the heated granules through apertures such that pellets are formed that are substantially greater density than the lost circulation and seepage control material.
grinding untreated lost circulation and seepage control material to produce granules, heating the granules to liquify naturally occuring binding agents; and pressing the heated granules through apertures such that pellets are formed that are substantially greater density than the lost circulation and seepage control material.
10. The method of claim 9 wherein the untreated lost circulation and seepage control material comprises an organic material.
11. The method of creating a dense additive for use in drilling operations comprising the step of:
obtaining untreated ground fiber;
compressing said ground fiber into a pellet such that the pellet has substantially greater density than the ground fiber; and adding the pellets to the drilling fluid for circulation in the well.
obtaining untreated ground fiber;
compressing said ground fiber into a pellet such that the pellet has substantially greater density than the ground fiber; and adding the pellets to the drilling fluid for circulation in the well.
12. The pelletized dense additive of claim 6 wherein the pellets have a diameter substantially in the range of 1/8 inch to 3/4 inch and a length substantially in the range of 1/8 inch to 1 inch.
13. The pelletized dense additive of claim 6 wherein the pellets have a density that is between two and 3 times greater than the density of the ground lost circulation and seepage control material.
14. The method of claim 1 wherein the lost circulation and seepage control material comprises ground wood.
15. The method of claim 1 wherein the lost circulation and seepage control material comprises corn cobs.
16. The method of claim 1 wherein the lost circulation and seepage control material comprises almond shells.
17. The method of claim 1 wherein the lost circulation and seepage control material comprises rice hulls.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US36055899A | 1999-07-26 | 1999-07-26 | |
US09/360,558 | 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 |
---|---|
CA2380237A1 true CA2380237A1 (en) | 2001-02-01 |
Family
ID=23418511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002380237A Abandoned CA2380237A1 (en) | 1999-07-26 | 2000-06-29 | Method for injecting dense additive into drilling wells and composition therefor |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP1208282A1 (en) |
CN (1) | CN1364211A (en) |
AU (1) | AU5900900A (en) |
BR (1) | BR0012724A (en) |
CA (1) | CA2380237A1 (en) |
MX (1) | MXPA02000956A (en) |
NO (1) | NO20020385D0 (en) |
RU (1) | RU2241730C2 (en) |
WO (1) | WO2001007750A1 (en) |
Families Citing this family (10)
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 (en) * | 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 | Powder consisting of hydrolyzable resin particles |
JP6062986B2 (en) | 2015-03-20 | 2017-01-18 | デクセリアルズ株式会社 | Filtration aid and filtration treatment method |
JP6109225B2 (en) | 2015-03-30 | 2017-04-05 | デクセリアルズ株式会社 | Water purification agent and water purification method |
JP6133348B2 (en) | 2015-03-30 | 2017-05-24 | デクセリアルズ株式会社 | Water purification agent, water purification agent production method, and water purification method |
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 (en) * | 2017-07-17 | 2019-03-12 | Общество с ограниченной ответственностью "БурениеСервис" | Method for obtaining erosion buffer liquid |
US11125046B2 (en) * | 2019-12-10 | 2021-09-21 | Saudi Arabian Oil Company | Deploying wellbore patch for mitigating lost circulation |
CN113898313B (en) * | 2021-10-13 | 2023-05-30 | 中石化石油工程技术服务有限公司 | Shale gas horizontal well oil-based drilling fluid collapse-preventing and leakage-stopping construction method |
Family Cites Families (3)
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 |
-
2000
- 2000-06-29 CA CA002380237A patent/CA2380237A1/en not_active Abandoned
- 2000-06-29 AU AU59009/00A patent/AU5900900A/en not_active Abandoned
- 2000-06-29 WO PCT/US2000/017982 patent/WO2001007750A1/en not_active Application Discontinuation
- 2000-06-29 RU RU2002104712/03A patent/RU2241730C2/en active
- 2000-06-29 EP EP00945008A patent/EP1208282A1/en not_active Withdrawn
- 2000-06-29 MX MXPA02000956A patent/MXPA02000956A/en unknown
- 2000-06-29 BR BR0012724-8A patent/BR0012724A/en not_active IP Right Cessation
- 2000-06-29 CN CN 00810859 patent/CN1364211A/en active Pending
-
2002
- 2002-01-24 NO NO20020385A patent/NO20020385D0/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
MXPA02000956A (en) | 2002-09-18 |
NO20020385L (en) | 2002-01-24 |
EP1208282A1 (en) | 2002-05-29 |
RU2241730C2 (en) | 2004-12-10 |
CN1364211A (en) | 2002-08-14 |
WO2001007750A1 (en) | 2001-02-01 |
AU5900900A (en) | 2001-02-13 |
NO20020385D0 (en) | 2002-01-24 |
BR0012724A (en) | 2002-05-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6825152B2 (en) | Method for creating dense drilling fluid additive and composition therefor | |
US20020147113A1 (en) | Method for creating dense drilling fluid additive and composition therefor | |
US4428844A (en) | Compacted lost circulation material | |
EP2300221B1 (en) | Method for pulping lignocellulose into fibre materials | |
US5076944A (en) | Seepage loss reducing additive for well working compositions and uses thereof | |
EP0961542B1 (en) | Method for producing sorbents on the basis of a cellulose-containing material and clay minerals | |
CA2380237A1 (en) | Method for injecting dense additive into drilling wells and composition therefor | |
US20070251143A1 (en) | Synthetic fuel pellet and methods | |
CA2536538A1 (en) | Blended mulch products for spray application to a surface | |
DE102009053210A1 (en) | Producing lime- or dolomite containing agglomerate, useful e.g. as a fertilizer, a supplement agent in metallurgy, comprises building-up agglomeration with finely divided solid starting materials and a liquid agglomeration medium | |
US20040063588A1 (en) | Delivery system for drilling fluid dispersible additive tablet and associated methods | |
US20170121620A1 (en) | Processed Biomass Pellets From Organic-Carbon-Containing Feedstock | |
US9255455B2 (en) | Drill cuttings treatment system | |
WO2001068787A1 (en) | Method for creating dense drilling fluid additive and composition therefor | |
WO2006037304A1 (en) | Carbon wet-pelletising method for obtaining pallets | |
US4034120A (en) | Pelleting aid for agricultural products | |
US6399545B1 (en) | Method and composition of drilling with fluid including additive | |
DE19537238A1 (en) | Preparation of water-resistant agglomerates from mixt. of lignite and renewable bio-material | |
GB2265150A (en) | Composition containing sub-divided straw or other agricultural fibres | |
RU2002104712A (en) | The method of injection of dense additives in boreholes and the composition of this additive | |
US20170044346A1 (en) | Process for making pellet product for use in soil neutralization and other applications | |
US8765450B2 (en) | Compositions and methods for waste remediation | |
RU2577851C1 (en) | Composition for production of solid-fuel products | |
US9914131B2 (en) | Wood-based cement additive | |
WO1996019284A1 (en) | Paper recycling |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Discontinued |