RU2083798C1 - Method for separating beds in well by shaped blocking unit - Google Patents
Method for separating beds in well by shaped blocking unit Download PDFInfo
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- RU2083798C1 RU2083798C1 RU95100927A RU95100927A RU2083798C1 RU 2083798 C1 RU2083798 C1 RU 2083798C1 RU 95100927 A RU95100927 A RU 95100927A RU 95100927 A RU95100927 A RU 95100927A RU 2083798 C1 RU2083798 C1 RU 2083798C1
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- pipes
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- well
- described around
- corrugations
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000000903 blocking effect Effects 0.000 title abstract 2
- 239000000565 sealant Substances 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 7
- 239000000470 constituent Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 208000032544 Cicatrix Diseases 0.000 description 9
- 231100000241 scar Toxicity 0.000 description 9
- 230000037387 scars Effects 0.000 description 9
- 238000005755 formation reaction Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000013521 mastic Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- 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
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
- E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
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- Life Sciences & Earth Sciences (AREA)
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pipe Accessories (AREA)
Abstract
Description
Изобретение относится к нефтегазодобывающей промышленности, в частности к технологии изоляции зон осложнения бурения скважин с помощью профильных перекрывателей. The invention relates to the oil and gas industry, in particular to the technology of isolation of zones of complication of drilling wells using profile shutoffs.
Известен способ разобщения пластов в скважине профильным перекрывателем, включающий профилирование составляющих его обсадных труб с образованием продольных гофр (складок) и цилиндрических концов, заполнение впадин гор герметиков, свинчивание спрофилированных труб, спуск перекрывателя в необходимый интервал скважины, радиальное расширение его до диаметра скважины и развальцовывание (1). A known method of separating the layers in the well with a profile cutter, including profiling casing components with the formation of longitudinal corrugations (folds) and cylindrical ends, filling the hollows of the sealant mountains, screwing the profiled pipes, lowering the overlap to the required interval of the well, expanding it radially to the diameter of the well and expanding (1).
Недостатком этого способа является то, что при расширении перекрывателя давлением изнутри выпуклые части гофр при упирании в стенку скважины препятствуют распространению герметика вокруг перекрывателя, вследствие чего он выдавливается в продольных направлениях по впадинам гофр, оставляя разгерметизированные участки, в результате чего не обеспечиваются герметичность и надежность разобщения пластов. The disadvantage of this method is that when the overlap expands with pressure from the inside, the convex parts of the corrugations when abutting against the well wall prevent the sealant from spreading around the overlap, as a result of which it is squeezed out in longitudinal directions along the corrugation cavities, leaving depressurized sections, as a result of which the tightness and reliability of separation are not ensured layers.
Известна попытка устранить этот недостаток путем установки на концах перекрывателя цилиндрических пакеров, в которых уплотнительный элемент размещен в наружной кольцевой проточке патрубка (патент США n 5083608 от 28.01.92 г. кл. 166-55). A known attempt to eliminate this drawback by installing at the ends of the overlapper cylindrical packers in which the sealing element is placed in the outer annular groove of the pipe (US patent n 5083608 from 01/28/92, CL 166-55).
Однако при развальцовывании пакеров до плотного прижатия их стенок к стенке скважины нарушалась целостность патрубков и уплотнительных элементов из-за чрезмерной деформации их, что также не обеспечивало необходимых надежности и герметичности разобщения пластов. However, when the packers were expanded to tightly press their walls against the well wall, the integrity of the nozzles and sealing elements was violated due to their excessive deformation, which also did not provide the necessary reliability and tightness of the separation of the layers.
Наиболее близким к предлагаемому по количеству совпадающих существенных признаков является способ разобщения пластов в скважине профильным перекрывателем, включающий профилирование составляющих его труб с образованием продольных гофр (складок) и цилиндрических концов, осаждение этих концов труб до диметра описанной окружности их профильной части, заполнение впадин гофр (складок) герметиком, свинчивание труб и спуск перекрывателя в необходимый интервал скважины, радиальное расширение перекрывателя до диаметра скважины в интервале его установки и развальцовывания (2). Closest to the proposed by the number of coinciding essential features is a method of separating the layers in the well with a profile cutter, including profiling of its constituent pipes with the formation of longitudinal corrugations (folds) and cylindrical ends, the deposition of these pipe ends to a diameter of the circumference of their profile part, filling the corrugations of the corrugations ( folds) with sealant, screwing up the pipes and lowering the overlap to the required interval of the well, radial expansion of the overlap to the diameter of the well in the interval e th installation and flaring (2).
Этот способ имеет те же недостатки, которые отмечены при критике аналога (1), поскольку вопрос герметизации затрубного пространства в обоих случаях решается закладкой герметика в складки гофр. This method has the same disadvantages that were noted when criticizing the analogue of (1), since the issue of sealing the annulus in both cases is solved by laying the sealant in the folds of the corrugations.
Цель изобретения повышение надежности и герметичности разобщения пластов. The purpose of the invention is to increase the reliability and tightness of separation of formations.
Указанная цель достигается тем, что в описываемом способе, включающем профилирование составляющих его труб с образованием продольных гофр (складок) и цилиндрических концов, осаживание этих концов труб до диаметра описанной окружности их профильной части, заполнение складок гофр герметиком, свинчивание труб и спуск перекрывателя в необходимый интервал скважины, радиальное расширение перекрывателя внутренним давлением до диаметра скважины в интервале его установки и развальцовывания, согласно изобретению, участки профильных частей концевых труб перекрывателя, прилегающие к их цилиндрическим концам, перед свинчиванием труб осаживают до диаметра описанной вокруг них окружности на 2-3% меньшего по сравнению с диаметром окружности, описанной вокруг их средней части, и по периметру осаженных профильных участков выполняют замкнутые ободья (рубцы) с высотой, при которой диаметр окружности, описанной вокруг этих ободьев (рубцов), приблизительно равен диаметру окружности, описанной вокруг средней профильной части труб. This goal is achieved by the fact that in the described method, which includes profiling the pipes constituting it with the formation of longitudinal corrugations (folds) and cylindrical ends, upsetting these ends of the pipes to the diameter of the circumference of their profile part, filling the corrugations of the corrugations with sealant, screwing the pipes and lowering the overlap to the required well interval, radial expansion of the overlap by internal pressure to the diameter of the well in the interval of its installation and expansion, according to the invention, sections of profile parts of overlapping end pipes adjacent to their cylindrical ends, before making up the pipes, they are upset to the diameter of the circumference described around them, 2-3% smaller than the diameter of the circumference described around their middle part, and closed rims (scars) are made along the perimeter of the upset profile sections with a height at which the diameter of the circle described around these rims (scars) is approximately equal to the diameter of the circle described around the middle profile of the pipe.
При проведении патентного поиска не обнаружены способы изоляции пластов профильными перекрывателями с указанной совокупностью признаков. Следовательно, данное техническое решение соответствует критерию патентоспособности "Новизна", а "промышленная применимость" его очевидна. When conducting a patent search, no methods for isolating formations with profile overlappers with the specified set of features were found. Therefore, this technical solution meets the patentability criterion of "Novelty", and its "industrial applicability" is obvious.
Проверка изобретательского уровня не выявила технических решений, содержащих указанные отличительные признаки. Следовательно, данное изобретение соответствует и третьему критерию патентоспособности "Изобретательский уровень". A check of the inventive step did not reveal technical solutions containing these distinctive features. Therefore, this invention meets the third patentability criterion "Inventive step".
На фиг. 1 показан профильный перекрыватель, позиционированный в интервале его установки в скважине; на фиг. 2 профильный перекрыватель, установленный в скважине; на фиг. 3 сечение по А-А на фиг. 1; на фиг. 4 процесс профилирования трубы с одновременным осаживанием ее цилиндрических концов и калиброванием профильной части; на фиг. 5 осаживание концевых участков профильной части концевых труб перекрывателя; на фиг. 6 концевая труба перекрывателя с укрепленными на ней ободьями (рубцами). In FIG. 1 shows a profile shutter positioned in the interval of its installation in the well; in FIG. 2 profile shutter installed in the well; in FIG. 3 a section along AA in FIG. one; in FIG. 4 the process of profiling a pipe while simultaneously upsetting its cylindrical ends and calibrating the profile part; in FIG. 5 upsetting of the end sections of the profile of the end pipes of the overlap; in FIG. 6 end pipe of the overlap with rims (scars) fixed to it.
Способ осуществляют следующим образом. Входящие в компоновку перекрывателя 1 (фиг. 1) трубы 2 (фиг. 4) профилируют известным способом с помощью протяжного механизма ( не показан) и устройства для профилирования 3, оставляя концы 4 цилиндрическими. Одновременно с профилированием с помощью фильеры 5 концы 4 осаживают до диаметра Д1, равного диаметру Д2 окружности, описанной вокруг профильной части трубы 2, и спрофилированную часть ее калибруют. В результате профилирования трубы 2 образуются две продольные гофры (складки) 6 с выпуклостями 7 и впадинами 8 (фиг. 3).The method is as follows. Included in the layout of the overlap 1 (Fig. 1), the pipes 2 (Fig. 4) are profiled in a known manner using a pulling mechanism (not shown) and a
Затем прилегающие к цилиндрическим концам 4 участки 9 профильных труб 2, предназначенных для установки на концах перекрывателя 1, с помощью фильеры 10 (фиг. 5) дополнительно осаживают до диаметра Д3 описанной вокруг этих участков 9 окружности на 2-3% меньшего по сравнению с диаметром Д2 - окружности, описанной вокруг их средней части после ее калибрования. Протяженность участков 9 определяют с учетом общей длины перекрывателя, диаметра скважины и состояния стенок в интервале его установки. На практике она варьируется в пределах 1-2 м. Пределы дополнительного осаживания участков 9 труб 2 обосновываются тем, что осадка менее 2% не даст желательного результата, а при осадке более 3% произойдет чрезмерное уменьшение радиуса изгиба впадин 8 гофр 6, вследствие чего в местах изгиба стенок труб будет происходить перенапряжение металла с образованием микротрещин, что при последующем радиальном расширении перекрывателя может привести к нарушению целостности его стенки.Then adjacent to the
Далее по периметру участков 9 с интервалом примерно 200-300 мм выполняют замкнутые рубцы (ободья) 11 ( фиг. 1, 3, 6), например, при варной проволоки, шин и т.п. При этом высота рубцов (ободьев) 11 принимается такой, при которой диаметр Д4 описанной вокруг них окружности приблизительно равен диаметру Д2 окружности, описанной вокруг средней профильной части труб 2 после их калибрования. Таким образом, после выполнения указанных выше операций диаметры Д1 цилиндрических концов труб 2 и диаметры Д2 и Д4 описанных окружностей вокруг средней профильной части труб 2 и рубцов (ободьев) 11 приблизительно равны.Further, along the perimeter of
Затем подготовленные указанным образом трубы 2 свинчивают между собой, располагая при этом трубы с ободьями (рубцами) 11 по концам перекрывателя 1, который потом на колонне бурильных труб спускают в необходимый интервал скважины (фиг. 1). При этом в складки (впадины) 8 гофр 6 закладывают герметик 12, например, мастику ЛТ-1 и т.п. (фиг. 2). В позиционированном в зоне установки перекрывателе 1 закачкой жидкости создают давление, необходимое для его радиального расширения до прижатия его стенки к стенке скважины. При этом нижний конец перекрывателя снабжают башмаком 13 с клапаном ( не показан). Далее колонну бурильных труб отсоединяют от перекрывателя и, подняв ее из скважины и присоединив к ней развальцеватель, снова спускают в скважину. Затем вращением колонны развальцовывают перекрыватель 1, прижимая его стенки еще более плотнее к стенке скважины с одновременным калиброванием его проходного канала 14 (фиг. 2). При этом рубцы (ободья) 11, врезаясь частично в стенку скважину, образуют замкнутые полости 15, которые при раздаче осаженных участков 9 перекрывателя 1 заполняются герметиком 12 по всей окружности, образуя уплотнения в виде колец. В свою очередь рубцы (ободья) 11, упираясь в стенку скважины, дополнительно уплотняют затрубное пространство скважины на участках 9 перекрывателя 1. В целом обеспечивается надежное разобщение пластов в скважине. Then the pipes 2 prepared in this way are screwed together, placing the pipes with rims (scars) 11 at the ends of the
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RU95100927A RU2083798C1 (en) | 1995-01-17 | 1995-01-17 | Method for separating beds in well by shaped blocking unit |
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RU95100927A RU2083798C1 (en) | 1995-01-17 | 1995-01-17 | Method for separating beds in well by shaped blocking unit |
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US7516790B2 (en) | 1999-12-03 | 2009-04-14 | Enventure Global Technology, Llc | Mono-diameter wellbore casing |
US7546881B2 (en) | 2001-09-07 | 2009-06-16 | Enventure Global Technology, Llc | Apparatus for radially expanding and plastically deforming a tubular member |
US7552776B2 (en) | 1998-12-07 | 2009-06-30 | Enventure Global Technology, Llc | Anchor hangers |
US7571774B2 (en) | 2002-09-20 | 2009-08-11 | Eventure Global Technology | Self-lubricating expansion mandrel for expandable tubular |
US7712522B2 (en) | 2003-09-05 | 2010-05-11 | Enventure Global Technology, Llc | Expansion cone and system |
US7739917B2 (en) | 2002-09-20 | 2010-06-22 | Enventure Global Technology, Llc | Pipe formability evaluation for expandable tubulars |
US7740076B2 (en) | 2002-04-12 | 2010-06-22 | Enventure Global Technology, L.L.C. | Protective sleeve for threaded connections for expandable liner hanger |
US7757774B2 (en) | 2004-10-12 | 2010-07-20 | Weatherford/Lamb, Inc. | Method of completing a well |
US7775290B2 (en) | 2003-04-17 | 2010-08-17 | Enventure Global Technology, Llc | Apparatus for radially expanding and plastically deforming a tubular member |
US7793721B2 (en) | 2003-03-11 | 2010-09-14 | Eventure Global Technology, Llc | Apparatus for radially expanding and plastically deforming a tubular member |
US7798225B2 (en) | 2005-08-05 | 2010-09-21 | Weatherford/Lamb, Inc. | Apparatus and methods for creation of down hole annular barrier |
US7819185B2 (en) | 2004-08-13 | 2010-10-26 | Enventure Global Technology, Llc | Expandable tubular |
US7886831B2 (en) | 2003-01-22 | 2011-02-15 | Enventure Global Technology, L.L.C. | Apparatus for radially expanding and plastically deforming a tubular member |
US7918284B2 (en) | 2002-04-15 | 2011-04-05 | Enventure Global Technology, L.L.C. | Protective sleeve for threaded connections for expandable liner hanger |
RU2487231C1 (en) * | 2012-07-27 | 2013-07-10 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Device for open hole division into separate sections |
RU2495226C1 (en) * | 2012-02-08 | 2013-10-10 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Device for segregation of formations or productive stratum of horizontal well into separate areas |
RU2509863C1 (en) * | 2012-12-11 | 2014-03-20 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Connection of shaped tubes of shutters of wells |
RU2547870C1 (en) * | 2014-03-25 | 2015-04-10 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Device to divide borehole to separate sections |
RU2560039C1 (en) * | 2014-06-03 | 2015-08-20 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Method of formation segregation in well using profile packer and device for internal radial expansion of sections of profile part of packer pipes for fabrication of centralisers |
RU2584702C1 (en) * | 2015-03-24 | 2016-05-20 | Юлий Андреевич Гуторов | Device for selective sealing of productive formation at casing cementing |
RU2611791C1 (en) * | 2015-12-23 | 2017-03-01 | Публичное акционерное общество "Татнефть" имени В.Д. Шашина | Method for separation of horizontal well into separate sections |
RU2697089C2 (en) * | 2014-06-04 | 2019-08-12 | Веллтек Ойлфилд Солюшнс АГ | Downhole expandable metal pipe |
RU2719855C2 (en) * | 2015-05-26 | 2020-04-23 | Веллтек Ойлфилд Солюшнс АГ | Annular barrier having well expansion tubular element |
RU2737551C2 (en) * | 2019-03-29 | 2020-12-02 | Общество с ограниченной ответственностью "Научно-производственное предприятие "РостТех" | Equipment for repair of production strings of oil and gas wells |
-
1995
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Title |
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Legal Events
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MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20140118 |