WO2014043747A1 - Dispositif et procédé d'injection d'oxygène - Google Patents

Dispositif et procédé d'injection d'oxygène Download PDF

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Publication number
WO2014043747A1
WO2014043747A1 PCT/AU2013/001056 AU2013001056W WO2014043747A1 WO 2014043747 A1 WO2014043747 A1 WO 2014043747A1 AU 2013001056 W AU2013001056 W AU 2013001056W WO 2014043747 A1 WO2014043747 A1 WO 2014043747A1
Authority
WO
WIPO (PCT)
Prior art keywords
oxygen
wellbore
injection
lance
well
Prior art date
Application number
PCT/AU2013/001056
Other languages
English (en)
Inventor
Fazal Uddin SHAIKH
Casper Jan Hendrik BURGER
Greg Martin Parry PERKINS
Original Assignee
Linc Energy Ltd
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
Priority claimed from AU2012904057A external-priority patent/AU2012904057A0/en
Application filed by Linc Energy Ltd filed Critical Linc Energy Ltd
Publication of WO2014043747A1 publication Critical patent/WO2014043747A1/fr
Priority to AU2015100327A priority Critical patent/AU2015100327A4/en

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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/295—Gasification of minerals, e.g. for producing mixtures of combustible gases

Definitions

  • This invention relates to a device and method of carrying out underground coal gasification (UCG).
  • UCG underground coal gasification
  • a device and method for oxygen-blown UCG are disclosed.
  • Underground coal gasification is a process by which product gas is produced from a coal seam by combusting and gasifying the coal in situ in the presence of an oxidant.
  • the product gas is typically referred to as synthesis gas or syngas and can be used as a feedstock for various applications, including clean fuels production, chemical production and electricity generation.
  • the well allowing the injection of oxidant is called an injection well.
  • the well from which product gas emerges is called a production well.
  • Both horizontal and vertical well regions can be used for injection and production.
  • Underground coal gasification may also utilise one or more substantially vertical wells (e.g., a service well and an ignition well) located between the injection and production wells.
  • a coal seam having injection and production wells with a substantially horizontal wellbore linking the two is typically referred to as an underground coal gasifier.
  • the gasifier will have a combustion zone within which coal is combusted in the presence of an oxidant, a gasification zone located downstream of the
  • combustion zone in which coal is gasified and partially oxidized to produce product gas
  • a downstream pyrolysis zone in which pyrolysis of coal occurs.
  • Hot product gas flows downstream from the gasification zone and exits the ground from a well head of the production well.
  • a gasifier (gasification) cavity within the coal seam develops and grows in size.
  • the product gas (raw syngas) generated by UCG typically includes syngas as well as other components, and the constituency will depend on various factors including the type of oxidant used for UCG (air or other oxidant, such as oxygen or oxygen-enriched air), water presence (both ground water and exogenous water), coal quality, and UCG operating temperature and pressure.
  • An object of the present invention is to provide a device and method for UCG that minimises one or more of the problems of the prior art.
  • the invention provides an oxygen lance including: a) a lance body having an internal passage with a check valve inserted therein, b) a coiled tubing adapter connected to the rear end of the lance body, said adapter including a bore hole for the passage of a thermocouple cable, c) at least one spacer tube connected to the forward end of the lance body, d) an injection nozzle connected to the forward end of the spacer tube, and e) a thermocouple for monitoring the temperature of the injection nozzle.
  • one or more components of the oxygen lance include a centraliser.
  • the lance body, the coiled tubing adapter, the at least one spacer tube, and/or the injection nozzle can include a centraliser.
  • the method further includes the step of retracting the oxygen injection device in the direction of the injection well to establish one or more additional gasifier cavities in the coal seam.
  • Figure 1 is a perspective view of an oxygen lance according to an embodiment of the present invention.
  • Figure 3 is a cutaway view of another oxygen lance according to an embodiment of the present invention.
  • the present invention relates to a device and method for oxygen-blown UCG.
  • the words “comprise”, “comprises” and “comprising” will be understood to mean the inclusion of a stated integer, group of integers, step, or steps, but not the exclusion of any other integer, group of integers, step, or steps.
  • the invention provides an oxygen lance including: a) a lance body having an internal passage with a check valve inserted therein, b) a coiled tubing adapter connected to the rear (i.e., uphole) end of the lance body, said adapter including a bore hole for the passage of a thermocouple cable, c) at least one spacer tube connected to the forward (i.e., downhole) end of the lance body, d) an injection nozzle connected to the forward end of the spacer tube, and e) a thermocouple for monitoring the temperature of the injection nozzle.
  • the lance body can be of any suitable size, shape and construction, and can be made of any suitable material or materials.
  • the lance body can be of any suitable size, shape and construction, and can be made of any suitable material or materials.
  • the lance body can be of any suitable size, shape and construction, and can be made of any suitable material or materials.
  • the lance body can be of any suitable size, shape and construction, and can be made of any suitable material or materials.
  • the lance body can be of any suitable size, shape and construction, and can be made of any suitable material or materials.
  • the lance body can be of any suitable size, shape and construction, and can be made of any suitable material or materials.
  • the lance body has a round cross-section to provide an annular passage for the flow of oxygen, although other cross-section shapes are possible, as will be understood by one of ordinary skill in the art.
  • the lance body can be of unitary construction or can include two or more connectable body segments/pieces. Where the lance body includes multiple connectable segments/pieces, these segments/pieces can be screwed and/or welded together to form a complete body. For example, the ends of each body segment can be threaded, and the full-length lance body can include one or more threaded collars for connecting the ends of adjacent segments together.
  • adjacent body segments can be welded together to form a full-length lance body.
  • the lance body can have any suitable outer diameter and length.
  • the lance body can have an outer diameter of about two to four inches, including, for example, 2.25 inches, 2.50 inches, 2.75 inches, 2.90 inches, 3.00 inches, 3.25 inches, 3.50 inches, and 3.75 inches.
  • the lance body has an outer diameter of about 2.00 to 2.90 inches.
  • the outer diameter of the lance body will not exceed the inside diameter of a wellbore into which the oxygen lance is to be inserted.
  • the passage of the lance body includes a non-return/check valve (e.g., ball and spring, spring loaded flapper valve, or the like) fitted within the passage.
  • a check valve can prevent oxygen and/or product gas reverse flow in the oxygen lance.
  • More than one check valve can be included.
  • dual check valves can be included in the passage.
  • the at least one spacer tube includes two or more spacer tubes, including three, four, five, or six spacer tubes.
  • two spacer tubes are connected to the forward end of the lance body.
  • the injection nozzle will be connected to the forward end of the spacer tube farthest from the lance body.
  • information/data can be used to control the operating parameters of the oxygen lance, including oxygen injection rate and quantity, and optional fluid (e.g., water or carbon dioxide) injection rate and quantity. More than one thermocouple can be included on the oxygen lance.
  • one or more parts of the oxygen lance can be coated (e.g., via plasma coating) with a protective coating, including, for example, ceramic coatings, zirconia (zirconium oxide) coatings, alumina-zirconia coatings, and carbon composite coatings.
  • a protective coating including, for example, ceramic coatings, zirconia (zirconium oxide) coatings, alumina-zirconia coatings, and carbon composite coatings.
  • the metal casing inserted into the wellbore includes a perforated segment.
  • the perforations in the perforated segment can be of any suitable size, shape and arrangement as required to achieve one or more desired outcomes.
  • the perforations allow ignition of a coal seam from within the metal-cased wellbore using an ignition tool located within the wellbore at the perforated segment to ignite the surrounding coal seam.
  • the sheath can be of any suitable size, shape, and construction, and can be made of any suitable material or materials, including, for example, aluminium, fibreglass, carbon fibre, plastic, and combinations thereof.
  • the sheath can be about 1 mm to about 20 mm thick, including about 2 mm, about 5 mm, about 10 mm, or about 15 mm thick.
  • the sheath can be, for example, a membrane, sheet, or film that wraps around the outer diameter or the inner diameter of the casing at least once and covers some or all of the perforations in the perforated segment of the casing.
  • the sheath can be embedded in some or all of the perforations in the perforated segment of the casing.
  • the casing can include a firebreak material connected to the casing or forming part of the casing (e.g., a casing segment constructed of the firebreak material).
  • exemplary firebreak materials include, but are not limited to, the Inconel ® (predominantly nickel-chromium alloys), Monel ® (predominantly nickel-copper alloys), and Hastelloy ® (predominantly nickel-containing alloys) families of high- performance alloys.
  • the firebreak material and/or segment can be positioned adjacent the heel of an injection well.
  • the step of igniting the coal seam preferably includes using an ignition tool, whereby an ignition tool that includes ignition means is inserted into the coal seam via the injection well, a service well, and/or the production well. Once inserted into the coal seam, the ignition tool is used to ignite the coal seam and establish a combustion zone.
  • Inserting, positioning, and retracting the ignition tool within the coal seam can be achieved utilising coiled tubing.
  • the coiled tubing can be of any suitable size, shape and construction and can be made of any suitable material or materials. More particularly, the coiled tubing can be of any suitable length and diameter.
  • the coiled tubing is made of metal, such as stainless steel, carbon steel, or copper.
  • the coiled tubing can be of unitary construction or can include two or more connectable tube pieces. A preferred outer diameter for the coiled tubing is 1.75 to 3.5 inches.
  • the ignition tool is retracted a safe distance while continuing the injection of air into the wellbore to fuel/maintain combustion of the coal seam.
  • the ignition tool can be withdrawn from the coal seam following successful ignition of the seam.
  • the oxygen injection device used to introduce oxygen into the
  • the coiled tubing as described herein can include a single tube (line) connectable to a downhole tool (e.g., an ignition tool or an oxygen injection device).
  • the coiled tubing can alternatively include at least one inner tube (inner line) extending within an outer tube (outer line), wherein one of the tubes is connected to one downhole tool while the other tube is connected to another downhole tube. That is, the coiled tubing can include at least one inner tube and an outer tube that extend concentrically relative to one another. More than one inner tube may extend within the same outer tube.
  • a preferred diameter for the outer tube is 2.0 inches, whereas a preferred diameter for the inner tube is 0.75 inches.
  • the oxygen injection device can include a controller operable to control the release/injection of oxygen.
  • the controller can be operated remotely from the oxygen injection device. Oxygen injection rate and quantity can be adjusted using flow controlling devices.
  • the controller can include pressure safety devices, filtration devices, and flow metering devices, in addition to isolation valves. Control logic can allow the oxygen to flow as per the required settings.
  • volume/volume nitrogen and less than about 1% volume/volume nitrogen.
  • FIG. 2 A cutaway view of the oxygen lance 50 is shown in Figure 2, and illustrates the passage 63 in the lance body 51 , with dual check valves 64 in the passage 63. As also illustrated, the passage 63 extends through the spacer tubes 56 and injection nozzle 57.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

La présente invention concerne un dispositif et un procédé permettant d'effectuer une gazéification souterraine de charbon à l'air enrichi en oxygène.
PCT/AU2013/001056 2012-09-18 2013-09-17 Dispositif et procédé d'injection d'oxygène WO2014043747A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2015100327A AU2015100327A4 (en) 2012-09-18 2015-03-16 Oxygen injection device and method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2012904057A AU2012904057A0 (en) 2012-09-18 Oxygen injection method and device
AU2012904057 2012-09-18

Related Child Applications (1)

Application Number Title Priority Date Filing Date
AU2015100327A Division AU2015100327A4 (en) 2012-09-18 2015-03-16 Oxygen injection device and method

Publications (1)

Publication Number Publication Date
WO2014043747A1 true WO2014043747A1 (fr) 2014-03-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2013/001056 WO2014043747A1 (fr) 2012-09-18 2013-09-17 Dispositif et procédé d'injection d'oxygène

Country Status (1)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016070700A1 (fr) * 2014-11-06 2016-05-12 新奥气化采煤有限公司 Buse et procédé d'injection
WO2017205943A1 (fr) * 2016-06-03 2017-12-07 Wildfire Energy Pty Ltd Production d'un gaz et procédés associés
CN108518211A (zh) * 2018-03-29 2018-09-11 中为(上海)能源技术有限公司 用于煤炭地下气化工艺的氧化剂混合注入系统及操作方法
RU2706498C1 (ru) * 2016-08-24 2019-11-19 Чжунвей (Шанхай) Энерджи Текнолоджи Ко. Лтд Оборудование для нагнетания окислителя в процессе подземной газификации угля и его применение
US11066916B2 (en) 2017-01-12 2021-07-20 Zhongwei (Shanghai) Energy Technology Co. Ltd Nozzle and injection device for use in underground coal gasification process and method for operating injection device
RU2798546C1 (ru) * 2022-12-02 2023-06-23 Общество с ограниченной ответственностью "Специальные Инструменты Горного Дела-ПГУ" Устройство для подачи дутья в подземный газогенератор при подземной газификации угля

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012109711A1 (fr) * 2011-02-18 2012-08-23 Linc Energy Ltd Allumage d'une veine de charbon souterraine dans un processus de gazéification de charbon souterrain (ucg)

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012109711A1 (fr) * 2011-02-18 2012-08-23 Linc Energy Ltd Allumage d'une veine de charbon souterraine dans un processus de gazéification de charbon souterrain (ucg)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016070700A1 (fr) * 2014-11-06 2016-05-12 新奥气化采煤有限公司 Buse et procédé d'injection
WO2017205943A1 (fr) * 2016-06-03 2017-12-07 Wildfire Energy Pty Ltd Production d'un gaz et procédés associés
CN109477009A (zh) * 2016-06-03 2019-03-15 野火能源有限公司 一种气体的产品及方法
US11473777B2 (en) 2016-06-03 2022-10-18 Wildfire Energy Pty Ltd Methods of producing a gas from a combustible material
RU2706498C1 (ru) * 2016-08-24 2019-11-19 Чжунвей (Шанхай) Энерджи Текнолоджи Ко. Лтд Оборудование для нагнетания окислителя в процессе подземной газификации угля и его применение
US10711587B2 (en) 2016-08-24 2020-07-14 Zhongwei (Shanghai) Energy Technology Co. Ltd Oxidizing agent injection equipment for underground coal gasification process and application thereof
US11066916B2 (en) 2017-01-12 2021-07-20 Zhongwei (Shanghai) Energy Technology Co. Ltd Nozzle and injection device for use in underground coal gasification process and method for operating injection device
CN108518211A (zh) * 2018-03-29 2018-09-11 中为(上海)能源技术有限公司 用于煤炭地下气化工艺的氧化剂混合注入系统及操作方法
CN108518211B (zh) * 2018-03-29 2024-01-30 中为(上海)能源技术有限公司 用于煤炭地下气化工艺的氧化剂混合注入系统及操作方法
RU2798546C1 (ru) * 2022-12-02 2023-06-23 Общество с ограниченной ответственностью "Специальные Инструменты Горного Дела-ПГУ" Устройство для подачи дутья в подземный газогенератор при подземной газификации угля

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