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WO2004025067A2 - Procede et appareil permettant de reduire l'accumulation de paraffine, d'asphaltenes et d'hydrates dans des puits, et d'assurer une protection contre celle-ci - Google Patents

Procede et appareil permettant de reduire l'accumulation de paraffine, d'asphaltenes et d'hydrates dans des puits, et d'assurer une protection contre celle-ci Download PDF

Info

Publication number
WO2004025067A2
WO2004025067A2 PCT/US2002/040222 US0240222W WO2004025067A2 WO 2004025067 A2 WO2004025067 A2 WO 2004025067A2 US 0240222 W US0240222 W US 0240222W WO 2004025067 A2 WO2004025067 A2 WO 2004025067A2
Authority
WO
WIPO (PCT)
Prior art keywords
capsule
shell
oil well
chemically active
active mass
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.)
Ceased
Application number
PCT/US2002/040222
Other languages
English (en)
Other versions
WO2004025067A3 (fr
WO2004025067A8 (fr
Inventor
Boris E. Kogai
Gennady V. Katzyn
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.)
KKG Group LLC
Original Assignee
KKG Group 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 KKG Group LLC filed Critical KKG Group LLC
Priority to AU2002361719A priority Critical patent/AU2002361719A1/en
Publication of WO2004025067A2 publication Critical patent/WO2004025067A2/fr
Publication of WO2004025067A3 publication Critical patent/WO2004025067A3/fr
Publication of WO2004025067A8 publication Critical patent/WO2004025067A8/fr
Anticipated expiration legal-status Critical
Ceased 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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
    • C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes

Definitions

  • the instant invention relates to methods and articles for cleaning oil wells
  • the differing kinds of oil wells include the gas-lift well, which brings oil to the
  • centrifugal pump well where a pump is placed in the depths of the well to create a pressure differential to bring oil to the surface.
  • an article and method for reducing paraffin, asphaltene, and hydrate accumulations in oil wells through use of a capsule enclosing a chemically active mass which is inserted into an oil well and which slides down the well, reacting with and reducing paraffin, asphaltene, and hydrate accumulations as it travels down the well has not previously been provided.
  • asphaltene, and hydrates has not previously been provided.
  • novel articles and methods provide a number of advantages. Advantage arises from the reduction of asphaltene and hydrate accumulations in an oil well treated with the disclosed invention. Advantage arises from the reduction of paraffin accumulations in an oil well treated with the disclosed invention. Advantage arises from the adaptability of the present invention to use with under sea wells. Advantage arises from the ability of the present invention to reopen closed oil wells through treatment by the present invention. Advantage arises from the small work crew that is needed or use of the present invention. Advantage arises from the ability to clean the well with the presently described invention without significantly interrupting the flow of oil during the cleaning period.
  • FIGURE 1 shows an embodiment of the present invention with the gel precursor option.
  • FIGURES 2 through 4 show an embodiment of the present invention in
  • FIGURE 5 shows a toroidal cylinder embodiment of the present invention.
  • FIGURE 6 shows another embodiment of the present invention.
  • an oil well capsule for use on pressure differential wells.
  • an oil well capsule for use on pressure differential wells.
  • the capsule preferably has the shape of a cylindrical tube. Capsule diameter and length can be sized to accommodate differing oil wells In the preferred embodiment, length is 500 millimeters (mm) and diameter is 36 mm.
  • the shell 14 wraps the chemically active mass.
  • the shell is made of ordinary aluminum foil.
  • the shell has three components: a rectangular body 18 with length and height, and two end pieces 20.
  • the foil has a thickness in the range 0.01 to 0.4 mm.
  • the diameter of the end pieces is preferably 36 mm.
  • the two end pieces 20 are circular in shape and form
  • the length of the body is preferably 500 mm.
  • the height of the body corresponds to the diameter of the capsule such that the height
  • the 10 mm in the height calculation represents the excess over-cover of the capsule when the body is wrapped around the chemically active mass to make the
  • the height of the body is 123 mm.
  • the shell can have differing dimension to adapt to different sizes of the capsule.
  • the chemically active mass consists essentially of alkaline or alkaline earth metal, and can be sodium, lithium, potassium, calcium, strontium, barium or combinations of them. In the preferred embodiment, the chemically active mass
  • alkaline or alkaline earth metal in powdered form is heated to the melting
  • the chemically active mass is then cast in a cylinder
  • the metal is pressed in the cylinder form without melting due
  • a weight increaser can be added to the chemically active mass.
  • Inert powder consists essentially of inert powder with density not less than 2 grams per centimeter cubed (g/cm 3 ). Inert powder is chosen from the selection
  • the weight increaser can be added by pressing the weight increaser into the heated chemically active mass. This can be accomplished by distributing the weight increaser generally uniformly on the surface of the chemically active mass and then pressing the distributed weight increaser into the mass with a plan press before the resulting mass is formed into a cylindrical form.
  • the chemically active mass can be put into a cylindrical press form and the weight increaser distributed along the axis when heated, and then pressing the press form halves together.
  • Yet another equivalent manner in which to add weight increaser includes melting the chemically active mass under a small layer of paraffin, or under the inert gas atmosphere, e.g. argon or nitrogen, mixed with weight increaser in a 10 to 1 ratio, and stirring, cooling, and forming.
  • a gel precursor within a core of said chemically active mass can be provided.
  • a gel precursor consists essentially of aluminum or scandium.
  • a core in the chemically active mass is prepared for receiving the gel precursor by mechanically pressing out a cylindrical cavity in the chemically active mass. Preferably, the pressing out occurs before the shell is put on the chemically active mass.
  • a hard rod of diameter 8 to 10 mm and height 500 mm is pushed into the chemically active mass, roughly in the center of said mass, and downward to within 10 to 15 mm of the opposite end of the device. The rod is then removed.
  • the resulting hollowed core 24 is filled with pressed aluminum or scandium tablets (diameter 8-10 mm) or aluminum or scandium powder, to within 10-15 mm of the top of the cavity.
  • the core is then plugged with a cork 22 fashioned from the chemically active mass material.
  • the height of the cork is 10-15 mm and diameter is 8-10 mm.
  • the shell body and end pieces are placed on a heat source.
  • the heat source is a steel slab, preferably having a thickness approximately 10mm and with length and width a little more than the length and width of the shell body and end pieces, which is placed on a heated electric stove.
  • Heat source can be copper, or any other metal which can be heated. Can be on a basic kitchen stove, with proper dimensions. Heated metal to be generally uniform temperature when heated.
  • Shell can be treated with melted bitumen.
  • the shell is heated to the temperature at which bitumen melts, preferably 70 to 90 degrees Celsius.
  • Bitumen is spread on the internal surfaces of the body and end pieces, by putting a piece of bitumen on the surfaces, and spreading the piece as the bitumen melts.
  • the bitumen is spread by use of a brush.
  • the thickness of the bitumen spread should be in the range of 0.1 mm to 0.5 mm.
  • another hydrocarbon composition can be used, such as a composition consisting essentially eighty percent mineral oil and twenty percent paraffin or polypropylene, or combinations of them.
  • the chemically active mass is placed on the shell body and rolled up leaving an open ended capsule, cylindrical in shape.
  • the shell end pieces are then placed on each end and the overlap from the shell body is formed around the ends of the cylinder.
  • the oil well capsule is prepared for insertion in an oil well by cutting a terminal in the end of the capsule, and then the capsule is inserted into the head of a pressure differential oil well, gas lift oil well, hydraulic well, or other type well of well without interior artificial obstructions.
  • the reaction starts when the metal contacts the water in the well.
  • the capsule is heavy enough that it will slowly slide down the pipe. It generates a temperature high enough to melt the paraffin, asphaltene, and hydrates accumulated on the inside of the oil pipes.
  • the general reaction formula is as follows:
  • M is an alkaline or alkaline earth metal and R is aluminum powder or scandium powder.
  • the H 2 O can come from any type of water, including salt water.
  • the capsule As shown in FIGs. 2 through 4, as the capsule slides down the well, it consumes itself in the process of generating enough heat to melt the paraffin, asphaltene, and hydrates. Eventually it is consumed with no residue remaining in the pipe.
  • This method significantly increases the time between oil well cleanings.
  • traditional cleaning methods the crystallization centers of the paraffin, asphaltene, and hydrate accumulations remain on the oil well pipe walls, with the result that the build up of the accumulations resumes as soon as the wells have been cleaned.
  • the oil well capsule of the present invention increases the temperature in the area where it is applied to a level higher than the congealing point of paraffin hydrocarbon. This makes it possible to remove completely the paraffin crystallization centers from the oil well walls and prevent solid deposits on them.
  • the gel precursor in the middle of the capsule is transformed to gel by the chemical reaction and is deposited on the inside of the oil wells.
  • This gel acts like a grease and prevents paraffin accumulations.
  • the gel sticks to the oil well walls and remains on the walls for a long time which then makes it difficult for new accumulations of paraffin, asphaltene, and hydrate to begin.
  • the time between oil well cleanings can be increased by anywhere from 3 to 8 times. That is, if the normal cleaning period is month, it can be extended from anywhere from 3 to 8 months, depending upon the chemical composition of the oil being pumped.
  • the capsule is provided as a toroidal cylinder 30, and preferably an increased outer diameter, for use in wells having a big diameter to decrease the hydrodynamic resistance of oil counter flow.
  • the chemically active mass 12 which can have a weight increaser, is prepared as a toroidal cylinder by casting or pressuring.
  • the outer wall 34 of the toroidal cylinder is preferably made of aluminum foil treated with bitumen in the same manner as previously described.
  • the inner wall 36 of the toroidal cylinder is made by coating the interior surface with a thin layer of bitumen 32 by spraying or swabbing the bitumen on the surface.
  • Aluminum foil is then applied to the interior surface by rolling up the interior surface on a steel rod, inserting the rod in the center of the toroidal cylinder, pressing the aluminum foil on the rod against he interior surface, and rolling the rod around the interior surface to roll the aluminum foil onto the interior surface, forming the inner wall.
  • the ends of the toroidal cylinder are then covered by washer shaped aluminum foil collars 38 that have been treated with bitumen.
  • the outside diameter of the toroidal cylinder capsule should be at least 2 cm less than the inner diameter of the oil well tubing.
  • perforations 40 on the shell of the capsule 10 and into the sodium beneath can be made, preferably by a knife or awl, to intensify the thermochemical reaction by increasing the likelihood and quantity of contact between the sodium and the water just prior to the capsule being inserted into the well.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)

Abstract

L'invention concerne une capsule pour puits de pétrole destinée à réduire l'accumulation de paraffine, d'asphaltènes et d'hydrates qui se forment sur les parois des conduites utilisées pour extraire du pétrole de dépôts souterrains, ainsi qu'un procédé d'utilisation de cette capsule. Ladite capsule pour puits de pétrole présente une coquille renfermant une masse chimiquement active qui contient principalement un métal alcalin ou alcalino-terreux. Ladite capsule pour puits de pétrole se présente sous forme de cylindre toroïdal contenant la masse chimiquement active. La coquille de ladite capsule pour puits de pétrole est percée par une pluralité de perforations afin d'augmenter la surface de contact initiale.
PCT/US2002/040222 2002-09-13 2002-12-16 Procede et appareil permettant de reduire l'accumulation de paraffine, d'asphaltenes et d'hydrates dans des puits, et d'assurer une protection contre celle-ci Ceased WO2004025067A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002361719A AU2002361719A1 (en) 2002-09-13 2002-12-16 Reducing paraffin, asphaltene, and hydrate accumulations in wells

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24380202A 2002-09-13 2002-09-13
US10/243,802 2002-09-13

Publications (3)

Publication Number Publication Date
WO2004025067A2 true WO2004025067A2 (fr) 2004-03-25
WO2004025067A3 WO2004025067A3 (fr) 2004-07-15
WO2004025067A8 WO2004025067A8 (fr) 2005-03-03

Family

ID=31991736

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/040222 Ceased WO2004025067A2 (fr) 2002-09-13 2002-12-16 Procede et appareil permettant de reduire l'accumulation de paraffine, d'asphaltenes et d'hydrates dans des puits, et d'assurer une protection contre celle-ci

Country Status (2)

Country Link
AU (1) AU2002361719A1 (fr)
WO (1) WO2004025067A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU194665U1 (ru) * 2019-08-30 2019-12-18 Общество с ограниченной ответственностью "СИБИРЬ ТЕХНОЛОГИЯ СЕРВИС" Устройство корпусное для термохимической обработки скважин
RU194664U1 (ru) * 2019-09-16 2019-12-18 Общество с ограниченной ответственностью "СИБИРЬ ТЕХНОЛОГИЯ СЕРВИС" Контейнер перфорированный для термохимической обработки скважин
CN119979137A (zh) * 2025-02-12 2025-05-13 振华石油控股有限公司 一种强碱解堵剂胶囊及其制备方法以及靶向综合解堵方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3676363A (en) * 1969-09-04 1972-07-11 Benjamin Mosier Production of weighted microcapsular materials
US5164099A (en) * 1990-12-06 1992-11-17 The Western Company Of North America Encapsulations for treating subterranean formations and methods for the use thereof
US5922652A (en) * 1992-05-05 1999-07-13 Procter & Gamble Microencapsulated oil field chemicals
BR9713405A (pt) * 1996-11-22 2000-01-25 Clariant Gmbh Aditivos para inibir a formação de hidratos gasosos.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU194665U1 (ru) * 2019-08-30 2019-12-18 Общество с ограниченной ответственностью "СИБИРЬ ТЕХНОЛОГИЯ СЕРВИС" Устройство корпусное для термохимической обработки скважин
RU194664U1 (ru) * 2019-09-16 2019-12-18 Общество с ограниченной ответственностью "СИБИРЬ ТЕХНОЛОГИЯ СЕРВИС" Контейнер перфорированный для термохимической обработки скважин
CN119979137A (zh) * 2025-02-12 2025-05-13 振华石油控股有限公司 一种强碱解堵剂胶囊及其制备方法以及靶向综合解堵方法

Also Published As

Publication number Publication date
WO2004025067A3 (fr) 2004-07-15
AU2002361719A8 (en) 2004-04-30
WO2004025067A8 (fr) 2005-03-03
AU2002361719A1 (en) 2004-04-30

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