SU1051222A1

SU1051222A1 - Casing repair method

Info

Publication number: SU1051222A1
Application number: SU823460547A
Authority: SU
Inventors: Василий Петрович Панков; Станислав Федорович Петров; Марк Лазаревич Кисельман; Виктор Иванович Мишин; Сергей Михайлович Никитин
Original assignee: Всесоюзный научно-исследовательский институт по креплению скважин и буровым растворам
Priority date: 1982-07-01
Filing date: 1982-07-01
Publication date: 1983-10-30

Abstract

Изобретение относитс к нефт ной и газовой пром-сти и предназначено дл ликвидации негерметичности в обсадных колоннах скважин„ Цель повышение надежности ремонта обсадной колонны Дл этого дополнительный патрубок спускают после спуска и расширени основного и размещают с зазором относительно торца После чего расшир ют обращенную к основному концевую часть дополнительного патрубка о Смещают дополнительный патрубок до упора в основной патрубок Затем расшир ют оставшуюс часть дополнительного патрубка. При использовании данного способа повьш1аетс надежность перекрыти нарушенного интервала обсадной колонны 10 илThe invention relates to oil and gas fields and is intended to eliminate leakage in casing strings. “The purpose is to increase the reliability of casing repair. To do this, the additional pipe is lowered after lowering and expanding the main pipe and positioned with a gap relative to the end face. part of the additional nozzle O Shift the additional nozzle until it stops at the main nozzle Then the remaining part of the additional nozzle is expanded. When using this method, the reliability of the overlap of the broken interval of the casing string 10 or less increases.

Description

Изобретение относитс к способам, примен емым дл ликвидации негерметичности в обсадных колоннах скважин нефт ной и газовой промьшшенноси, в частности, при капитальном ремонте обсадных колонн„The invention relates to methods used to eliminate leakage in the casing of oil and gas wells, in particular, in the overhaul of casing "

Целью изобретени вл етс повышение надежности ремонта обсадной колонны The aim of the invention is to improve the reliability of casing repair

На фиг. 1-5 изображена последовательность операгщй по способу при работе снизу вверх; на фиг, 6-10 - то же при работе сверху вниз сFIG. 1-5 depict the sequence of the operand by the method when working from the bottom up; Fig 6-10 - the same when working from top to bottom with

Способ включает последовательность операций с инструментом 1, например, радиально-расшир ющейс головкой Инструмент, опускают в скважину на трубах 2 к месту 3 нарушени .обсадной колонны с дополнительным гофрированным патрубком 4 и упором 5 Установленный ранее основной пластьфь в виде гофрированного патрубка 6 зан л положение , показанное на фиг 1, место 3 нарушени обсадной колоннь осталось неперекрытым, начина от головы патрубка 6 и выше Дополнительный гофрированньй патрубок 4 опускаетс к ранее установленному патрубку 6 и размещаетс с зазором от него по торцу .The method includes a sequence of operations with the tool 1, for example, a radially expanding head of the Tool, lowered into the well on the pipes 2 to the location 3 of the disturbance of the casing with an additional corrugated pipe 4 and the stop 5 Previously installed main face in the form of a corrugated pipe 6 , shown in Fig. 1, the casing disturbance place 3 remains uncovered, starting from the head of the nozzle 6 and above. The additional corrugated nozzle 4 is lowered to the previously installed nozzle 6 and placed with gap from it on the butt.

Claims

Then, in pipes 2, a fluid pressure of 1/3 of the working pressure is created. At this time, tool 1 \ expands the additional end pipe facing the main end within the limits shown in FIG. 11, i.e. not fully. Adhesion of the patch to the column will occur only along the protrusions. With all this, the tool 1 in the patch (figure 2) makes up the initial part of its length. This will allow it to be easily moved down by the stop 5 to the contact to the previously installed branch pipe 6 without the top 3 3 (figo Rear 4) and cover the interval between the HiiMif additional patch. 4 ubkom Thereafter, the fluid pressure in instr ente r 1 is reduced to zero. The radial loads of tool 1 on nozzle 4 are reduced and it is transferred to B initial position (curvature). Stopper 5 moves nozzle 4 down to abutment B previously installed nozzle b, overlapping the spacing interval (FIG 4), part of the nozzle 4 abuts the upper part previously installed nozzle 6c. At the junction, a tight connection of two thin-walled nozzles, shown in Fig. 5c, is obtained. After that, tool 1 is pulled through nozzle 4 until it exits (Fig. 5) c. In the casing installation, there is an option where the nozzle is expanded from tool 1 from top to bottom. The sequence of operations according to the method in this case is the same as the first option, only the additional Jli-KTS2 nozzle 4 is set tight. pipes 2 up to the stop in the previously installed pipe 6 in the siege column (Fig. 6-10). Thus, using this method of connecting the pipes, it is possible to increase the reliability of closing the broken casing interval. Formula of the invention The method of casing repair, including the descent into the well, expansion and butt-up of the main and additional nozzles, characterized in that, in order to improve the reliability of the casing repair, the additional nozzle is lowered after the descent and expansion of the main one and is placed with a gap m relative to the end of the latter, after che. The first end portion of the additional nozzle, which is facing the main end, is extended, shifted to the main abutment, and then the remaining part of the additional end piece "S .6

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