SU976019A1

SU976019A1 - Method of setting a patch of corrugated pipe length

Info

Publication number: SU976019A1
Application number: SU813288642A
Authority: SU
Inventors: Василий Павлович Панков; Станислав Федорович Петров; Марк Лазаревич Кисельман; Сергей Владимирович Виноградов; Виктор Иванович Мишин; Сергей Михайлович Никитин
Original assignee: Всесоюзный научно-исследовательский институт по креплению скважин и буровым растворам
Priority date: 1981-05-13
Filing date: 1981-05-13
Publication date: 1982-11-23

Abstract

Изобретение относитс к области нефт ной и газовой промьшшенности, а именно к способам ликвидации негерметичности обсадных колонн путем установки пластыр из гофрированного патрубка. Целью изобретени вл етс обеспечение возможности- контрол положени пластьф после его установки. Поставленна цель достигаетс тем, что после прот жки расшир ющего инj струмента 6 на части патрубка 4 производ т спуск расшир ющего инструмента до контакта упора 5 с нерасширенным концом патрубка 4 и дополнительньй замер длины спускаемых труб, по которому суд т о положении нерасширенного конца патрубка. 6 ил. The invention relates to the field of oil and gas industry, and in particular to methods for eliminating casing leakage by installing a patch from a corrugated pipe. The aim of the invention is to provide the possibility of controlling the position of the plate after its installation. The goal is achieved by the fact that after the expanding tool 6 is stretched, a part of the nozzle 4 is lowered to the contact of the stop 5 with the unexpanded end of the nozzle 4 and an additional measurement of the length of the lowered pipes by which the position of the non-expanded end of the nozzle is measured. 6 Il.

Description

Изобретение относитс к области нефт ной и газовой промышленности, а именно к способам ликвидации негерметичности обсадных колонн путем установки пластьф из гофрированного патрубка.The invention relates to the field of the oil and gas industry, and in particular to methods for eliminating casing leakage by installing a corrugated pipe.

Целью изобретени вл етс .обеспечение возможности контрол положени пластыр после его установки.The aim of the invention is to make it possible to control the position of the patch after its installation.

Сущность способа по сн етс чертежом . На фиГi1-3 показана реализаци способа при работе снизу вверх; на фиг.4-6 - реализаци способа при работе сверху вниз.The essence of the method is illustrated in the drawing. Figure 1-3 shows the implementation of the method when working from the bottom up; Figures 4-6 illustrate the implementation of the method from top to bottom.

Поставленна цель достигаетс тем, что после прот жки расшир ющего инструмента на части патрубка производ т спуск расшир ющего инструмента до контакта упора с нерасширенным концом патрубка и дополнительный замер длины спускаемых труб, по которому су- f д т о положении нерасширенного конца The goal is achieved by the fact that after the expansion tool is pulled, the expansion tool is lowered to a part of the nozzle until the contact of the stop with the unextended end of the nozzle and an additional measurement of the length of the lowered pipes, which the position of the non-extended end

СО патрубка.CO pipe.

При работе снизу вверх способ осуО5 ществл етс следующим образом.When working from the bottom up, the method is implemented as follows.

Claims

In the casing 1, which has a leakage zone 2, a corrugated nozzle 4 fixed from one end with an emphasis 5 at the same time measuring the length of the descending pipes is lowered on the string of pipes 3 of a smaller diameter and after the descent of the nozzle to the place of the casing string leakage (Fig. 1), the expanding tool is inserted into it and pulled over the stroke of the hydraulic cylinder. In this case, the nozzle expands with support on the support 5 of the tool. Then the string of pipes 3 is lifted, without withdrawing the expanding tool 3.9 from the branch pipe, while the branch pipe expands on the basis of the casing (Fig. 2). Then, the pressure in the hydraulic system is reduced to zero, as a result of which the expansion tool goes to its original position, lower the string of pipes 3 until it stops against the unextended end of the nozzle (Fig. 3) and measure the length of the lowered pipes. When working from top to bottom, the method is carried out in a similar way. In the event that for technical reasons (inaccuracy in the manufacture of the nozzle, incorrect selection of the ratio of the diameters of the nozzle and casing, etc.), the adhesion forces of the initial extended section of the nozzle with the casing will be insufficient when lifting the string of pipe 3 with the tool for expanding the nozzle based on the column, the nozzle can be moved relative to the leakage zone. By knowing the location of the upper or lower end of the nozzle and the length of the nozzle, it is possible to determine the interval covered by the plaster and, consequently, the position of the plaster in relation to the leakage zone. The invention of the method of controlling the position of a plaster from a corrugated pipe, which is lowered into a casing string on a smaller diameter string of pipes, while simultaneously measuring the length of the lowered pipes and fixed from one end by the abutment, and on the other, by an expanding tool, characterized in that controlling the position of the patch after its installation, after drawing the expansion tool on the part of the socket and the subsequent lowering of the expansion tool until it contacts the stop with the unexpanded end of the patch cutting, an additional measurement of the length of the discharge pipe is taken, by which the position of the open end of the nozzle is judged.

(Rig.6

Phi2.5