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SU1710694A1 - Method for casing repair - Google Patents

Method for casing repair
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Publication number
SU1710694A1
SU1710694A1SU894710051ASU4710051ASU1710694A1SU 1710694 A1SU1710694 A1SU 1710694A1SU 894710051 ASU894710051 ASU 894710051ASU 4710051 ASU4710051 ASU 4710051ASU 1710694 A1SU1710694 A1SU 1710694A1
Authority
SU
USSR - Soviet Union
Prior art keywords
casing
plaster
patch
repair
outer sealing
Prior art date
Application number
SU894710051A
Other languages
Russian (ru)
Inventor
Валентин Антонович Юрьев
Вадим Петрович Неудачин
Виктор Иванович Никитин
Виктор Иванович Власов
Владимир Анатольевич Никишин
Original Assignee
Всесоюзный научно-исследовательский и проектный институт по креплению скважин и буровым растворам
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Application filed by Всесоюзный научно-исследовательский и проектный институт по креплению скважин и буровым растворамfiledCriticalВсесоюзный научно-исследовательский и проектный институт по креплению скважин и буровым растворам
Priority to SU894710051ApriorityCriticalpatent/SU1710694A1/en
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Publication of SU1710694A1publicationCriticalpatent/SU1710694A1/en

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Abstract

Translated fromRussian

Изобретение относитс  к ремонту скважин, а именно к способу подземного ремонта обсадных колонн. Цель изобретени  -повышение эффективности сцеплени  пластыр  с обсадной колонной в начальный момент работы формирующей головки. Это достигаетс  тем, что перед спуском пластыр  на концевые участки его наружного герметизирующего Покрыти  нанос т зернистый материал твердостью, большей твердости материалов обсадной колонны и пластыр . При этом размер зернистого материала не превышает толщину стенки пластыр . Дл  ремонта обсадной колонны осуществл ют спуск в интервал нагружени  герметичности плadтыp  в виде продольно гофрированного патрубка с наружным герметизирующим покрытием. Затем расшир ют его до плотного прижати  к внутренней поверхности осадной трубы формирующей головкой. 1 ил.V.(ЛThe invention relates to the repair of wells, and in particular to a method for underground casing repair. The purpose of the invention is to increase the effectiveness of adhesion of the patch to the casing at the initial moment of operation of the forming head. This is achieved by the fact that, prior to descending, a plaster on the ends of its outer sealing coating is applied a granular material with a hardness greater than the hardness of the casing materials and the plaster. The size of the granular material does not exceed the thickness of the wall plaster. To repair the casing string, the padtyp is lowered into the tightness loading range in the form of a longitudinally corrugated tube with an outer sealing coating. It is then expanded to tightly press against the inner surface of the siege tube with a forming head. 1 il.V. (L

Description

Translated fromRussian

Изобретение относитс  к технике подземного ремонта, а именно к восстановлению герметичности обсадных колонн металлическими пластыр ми нефт ных, вод ных и газовых скважин.The invention relates to the technique of underground repair, in particular, to the restoration of the tightness of casing strings by metal adhesives of oil, water and gas wells.

Известен способ ремонта обсадной колонны , когда перед спуском в скважину пластыр  на специальном устройстве типа ДОРН наружную поверхность его покрывают герметизирующим составом на основе наирита НТ.There is a known method for repairing a casing string when, before launching a plaster into a well, on a special device of the DORN type, its outer surface is covered with a sealing compound based on nairit NT.

Недостатком способа  вл етс  то, что с целью обеспечени  сопр жени  пластыр  с колонной в начальный период его расшире ни  конец пластыр  со стороны захода дорнирующей головки устройства не покрывают герметиком. Длина этого участка соответствует величине 300-500 мм.The disadvantage of this method is that, in order to ensure that the patch is coupled with the column, in the initial period of its expansion, the end of the patch on the approach side of the dorning head of the device is not covered with a sealant. The length of this area corresponds to the size of 300-500 mm.

Кроме того, применение герметика НТ ограничено по температуре до +70° С и не обеспечивает достаточную адгезию между пластырем и обсадной колонной. Этот герметик токсичен в процессе его нанесени .In addition, the use of NT sealant is limited in temperature to + 70 ° C and does not provide sufficient adhesion between the plaster and the casing. This sealant is toxic during application.

При расширении пластыр  прот жкой через него дорнирующей головки в начальный период не гарантируетс  качественное сопр жение между колонной и пластырем. В результате чего существует веро тность продольного смещени  пластыр  по колонне .When expanding a patch by pulling a dorning head through it in the initial period, there is no guarantee of a good fit between the column and the patch. As a result, there is a likelihood of longitudinal displacement of the patch along the column.

Все эти недостатки не позвол ют обеспечить поставленную цель - локальную герметизацию обсадной колонны в скважине путем надежной установки пластыр .All these shortcomings do not allow to achieve the set goal - local sealing of the casing string in the well by means of reliable installation of the patch.

Известен способ, включающий в себ  продольно-гофрированный пластырь, покрытый стеклотканью с отверждающейс The known method includes a longitudinally-corrugated plaster covered with fiberglass with cured

композицией на основе эпоксидной смолы, спуск к месту дефекта и расширение его до контактного сопр жени  с внутренней поверхностью обсадной КОЛОННЫ с помощью специального транспортного устройства.a composition based on epoxy resin, descending to the place of defect and its expansion to contact interface with the inner surface of the casing with a special transport device.

Недостатком этого способа  вл етс  то, что в начальный период отсутствует гаранти  качественного сопр жени  пластыр  с колонной (имеетс  веро тность смещени  пластыр  по колонне).The disadvantage of this method is that in the initial period there is no guarantee of high-quality coupling of the patch with the column (there is a probability of displacement of the patch along the column).

Кроме того, технологи  нанесени  этого герметика непроста , материал токсичен, имеет короткую жизнеспособность (до 24 ч), что приводит к преждевременному затвердеванию .In addition, the technology of applying this sealant is not easy, the material is toxic, has a short viability (up to 24 hours), which leads to premature hardening.

Цель изобретени  - повышение эффективности сцеплени  ;пластыр  с обсадной колонной в начальный момент работы дорнирующей головки.The purpose of the invention is to increase the adhesion efficiency of the patch to the casing at the initial moment of operation of the dorning head.

Эта цель достигаетс  тем,,что перед спуском в скважину пластыр  на концевые участки наружного герметизирующего покрыти  нанос т зернистый материал твердостью , большей твердости материалов обсадной колонны и пластыр , и размером, не превышающим толщину стенки пластыр . Таким материалом может быть, например ,. а(бразивный камень, алмаз, твердый сплав.This goal is achieved by applying a plaster to the end sections of the outer sealing coating before applying the well to a granular material with a hardness greater than that of the casing material and plaster and a size not exceeding the wall thickness of the plaster. Such material may be, for example. and (brazivny stone, diamond, hard alloy.

Герметизирующим материалом может быть лента ГЕРЛЕНД-Д. Эта лента обладает хорошей пластичностью, самокле ща с , что позвол ет наносить на ее кле щуюс  (рабочую) поверхность, в виде многогранной крошки твердый материал без применени  дополнительного кле  непосредственно перед наложением ленты на металлический пластырь.The sealing material can be a tape GERLEND-D. This tape has good ductility, self-adhesive, which makes it possible to apply a hard material on its adhesive (working) surface, in the form of a multifaceted crumb, without the use of additional glue immediately before applying the tape to a metal adhesive.

При расширении пластыр  до сопр жени  с обсадной трубой зернистый твердый материал своими гран ми врезаетс  в обсадную колонну и пластырь, обеспечива  прочный контакт на более коротком отрезке , чем,это происходит без его применени , и повышает коэффициент успешности и надежности установки пластыр ,.When the patch expands to mate with the casing, the granular solid material smashes into the casing and the patch with its edges, providing a strong contact at a shorter length than it does without using it, and increases the success rate and reliability of the patch installation.

Использу  эти качества твердого материала , герметизирующий материал (ленту ГЕРЛЕН-Д) нанос т сразу от торца пластыр , не оставл   технический пропуск на длине 300-500 мм дл . сопр жени  обсадной трубы с пластырем в начальный период расширени  дорнирующей головкой. Это позвол ет, сточки зрени  герметизации ремонтируемого участка обсадной трубы, использовать пластырь на всей его длине.Using these qualities of solid material, the sealing material (tape GERLEN-D) applied immediately from the end of the patch, did not leave a technical pass on the length of 300-500 mm long. coupling the casing with a plaster in the initial period of expansion with a dorning head. This allows, from the standpoint of sealing the repaired section of the casing, to use a patch over its entire length.

Величину нанесени  герметика с твердым зернистым материалом практически можно не ограничивать, однако, дл  обеспечени  надежности сцеплени  пластыр  с обсадной трубой, в начальный момент достаточно 200-400 мм, т.е. на одно-два кольца нанесенной ленты ГЕРЛЕН-Д с твердым зернистым материалом.The amount of application of the sealant with a solid granular material can practically not be limited, however, to ensure reliable adhesion of the patch to the casing, 200-400 mm is sufficient at the initial time, i.e. on one or two rings applied tape GERLEN-D with a solid granular material.

На чертеже-изображена заготовка пластыр .The drawing shows a blank patch.

Герметизирующий материал 1 с применением твердого зернистого материала в виде крошки -многогранной формы 2 нанос т на металлическую гофрированную трубу 3.The sealing material 1 using a solid granular material in the form of a crumble of a polyhedral form 2 is applied to a metal corrugated pipe 3.

Предложенное техническое решение повышает коэффициент успешности установки пластыр  и устран ет необходимость оставл ть технологический участок без нанесени  герметизирующего материала.The proposed solution improves the success rate of the installation of the patch and eliminates the need to leave the process area without applying a sealing material.

Claims (1)

Translated fromRussian
Формула изобретени Invention FormulaСпособ ремонта обсадной колонны, включающий спуск в обсадную колонну и установку пластыр  в виде продольно-гофрированного патрубка с наружным герметизирующим покрытием путем его расширени  дорнирующей головкой, отличающийс  тем, что, с целью повышени  эффективности сцеплени  пластыр  с обсадной колонной в начальный момент работы дорнирующей гоЛовки, перед спуском пластыр  на концевые участки наружного герметизирующего покрыти  нанос т .зернистый материал твердостью, большей твердости материалов обсадной колонны и пластыр , и размером, не превышающим толщину стенки пластыр .The method of repairing the casing, including the descent into the casing and the installation of a plaster in the form of a longitudinally-corrugated pipe with an outer sealing coating by expanding it with a siding head, characterized in that, in order to improve the adhesion of the plaster with the casing at the initial moment of the dorning head, Before descending, a plaster is applied to the end portions of the outer sealing coating. A grained material with a hardness greater than the hardness of the casing material and plaster, and measure not exceeding the thickness of the wall plaster.
SU894710051A1989-06-261989-06-26Method for casing repairSU1710694A1 (en)

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