SU853089A1 - Blank for patch for repairing casings - Google Patents
Blank for patch for repairing casings Download PDFInfo
- Publication number
- SU853089A1 SU853089A1 SU792844451A SU2844451A SU853089A1 SU 853089 A1 SU853089 A1 SU 853089A1 SU 792844451 A SU792844451 A SU 792844451A SU 2844451 A SU2844451 A SU 2844451A SU 853089 A1 SU853089 A1 SU 853089A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- pipe
- patch
- blank
- repairing
- casing
- Prior art date
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- Pipe Accessories (AREA)
Description
Изобретение относитс к буровой технике , а именно к устройствам дл ремонта обсадных колонн в скважине.The invention relates to a drilling technique, namely, devices for repairing casing strings in a well.
Известна заготовка пластыр дл перекрыти интервала повреждени или очаговой коррозии в обсадных трубах, выполненна из пластмассовой оболочки 1.The known blank patch to cover the interval of damage or focal corrosion in the casing, made of plastic sheath 1.
Недостатком этой заготовки пластыр вл етс слабое сцепление ее со стенками обсадной колонны.The disadvantage of this blank patch is its weak adhesion to the walls of the casing.
Наиболее близкой к изобретению по технической сущности и достигаемому результату вл етс заготовка пластыр дл ремонта обсадных труб, выполненна из металлической продольной гофрированной трубы 2.Closest to the invention to the technical essence and the achieved result is a blank patch for repairing casing pipes, made of metal longitudinal corrugated pipe 2.
Недостатком заготовки вл етс то, что она не обеспечивает нужного качества и надежности ремонта в интервале больших продольных трен1;ин, так как ремонтируемые трубы могут быть дополнительно нарушены в результате действи на них радиальных сил при установке пластыр .The disadvantage of the workpiece is that it does not provide the required quality and reliability of repair in the range of large longitudinal trains; in, since the repaired pipes can be further disturbed as a result of the effect of radial forces on them when installing the adhesive.
Цель изобретени - повышение качества и надежности ремонта путем снижени напр жений в теле ремонтируемой трубы в местах повреждени .The purpose of the invention is to improve the quality and reliability of the repair by reducing the stresses in the body of the pipe being repaired in the places of damage.
Это достигаетс тем, что продольно гофрированна труба выполнена в средней части с периметром, равным или меньшим наThis is achieved by the fact that the longitudinally corrugated pipe is made in the middle part with a perimeter equal to or less than
величину до З мм внутреннего периметра ремонтируемой обсадной трубы.up to 3 mm of the inner perimeter of the casing being repaired.
На фиг. 1 изображена заготовка пластыр ; на фиг. 2 - разрез фиг. 1. 5 Заготовка пластыр представл ет собой продольно гофрированную трубу 1, изготовленную из тонкостенной стальной трубы путем прот л ки через специальную оправку. Условный наружный диаметр гофрированной трубы I выбираетс на 1-3 мм больше внутреннего диаметра ремонтируемого участка обсадной трубы 2. Эта разность называетс условным нат гом между пластырем и трубой 2 с повреждением 3. В средней части 4 гофрированна труба 1 выполнена с периметром, равным или меньшим на величину до 3л мм внутреннего периметра трубы 2. Нри этом разность между внутренним диаметром трубы 2 и условным наружным диаметром средней части трубы 1 составл ет не более 3 мм.FIG. 1 shows a blank patch; in fig. 2 is a sectional view of FIG. 1. 5 A blank plaster is a longitudinally corrugated pipe 1, made of a thin-walled steel pipe, which is drawn through a special mandrel. The nominal outer diameter of the corrugated pipe I is selected 1-3 mm larger than the internal diameter of the repaired section of the casing 2. This difference is called the nominal tension between the plaster and the pipe 2 with damage 3. In the middle part 4 the corrugated pipe 1 is made with a perimeter equal to or less up to 3 liters of the inner perimeter of the pipe 2. In this case, the difference between the internal diameter of the pipe 2 and the nominal external diameter of the middle part of the pipe 1 is not more than 3 mm.
Гофрированную трубу 1 вместе с расширителем опускают в интервал, где находитс повреждение 3 трубы 2. После этого расширитель прот гиваетс внутри гофрированной трубы 1 гидравлическим толкателем или с помош,ью талевой системы по всей длине трубы 1. При этом концевыеThe corrugated pipe 1 together with the expander is lowered into the interval where 3 pipe 2 is damaged. After that, the expander is pulled inside the corrugated pipe 1 with a hydraulic pusher or with a pulley system along the entire length of pipe 1. At the same time, the end
30 верхн и нижние части пластыр плотно30 top and bottom plaster tightly
прижимаютс к стенкам ремонтируемой трубы 2, создава напр женную систему «пластырь - обсадна труба и не вызыва разрушени трубы 2, так как зоны напр жени приход тс на неповрежденный участок трубы 2. В зоне повреждени 3 напр жени в теле обсадной трубы 2 возникают незначительные, потому что радиальные усили расширител расходуютс в основном только на придание цилиндрической формы гофрированной трубе 1, длина которой выбираетс в зависимости от размеров и характера повреждени 3 обсадной трубы 2.pressed against the walls of the pipe 2 being repaired, creating a stressing system "patch - casing" and not causing pipe 2 to collapse, since the stress zones occur in the intact section of the pipe 2. In the damage zone 3, the stresses in the body of the casing 2 appear insignificant, because the radial forces of the expander are mainly spent only on shaping the cylindrical shape of the corrugated pipe 1, the length of which is chosen depending on the size and nature of the damage 3 of the casing 2.
Применение предложенной заготовки пластыр повышает надежность ремонта коррозированных труб, труб с продольными треш,инами и т. д.The application of the proposed blank patch increases the reliability of repair of corroded pipes, pipes with longitudinal trash, ins, etc.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792844451A SU853089A1 (en) | 1979-11-29 | 1979-11-29 | Blank for patch for repairing casings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792844451A SU853089A1 (en) | 1979-11-29 | 1979-11-29 | Blank for patch for repairing casings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU853089A1 true SU853089A1 (en) | 1981-08-07 |
Family
ID=20861312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU792844451A SU853089A1 (en) | 1979-11-29 | 1979-11-29 | Blank for patch for repairing casings |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU853089A1 (en) |
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| US6470966B2 (en) | 1998-12-07 | 2002-10-29 | Robert Lance Cook | Apparatus for forming wellbore casing |
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1979
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