SU641070A1

SU641070A1 - Hydraulic core head

Info

Publication number: SU641070A1
Application number: SU772520932A
Authority: SU
Inventors: Анатолий Петрович Кованов; Марк Лазаревич Кисельман; Валентин Анатонович Юрьев; Сергей Владимирович Виноградов; Альберт Васильевич Иванов
Original assignee: Всесоюзный научно-исследовательский институт по креплению скважин и буровым растворам
Priority date: 1977-08-29
Filing date: 1977-08-29
Publication date: 1979-01-05

Description

1one

Изобретение отнсситс к устройствам дл рем 1нта обсадных колонн вод ных, нефт ных и газовых скважин с целью восстановлени герметичности или упрочнени стенок колонны при помощи продольно-гофрированной металлической трубы.The invention relates to devices for repairing 1nta casing strings of water, oil and gas wells in order to restore airtightness or harden the walls of the casing using a longitudinally corrugated metal pipe.

Известна гидравлическа дорнируюша головка, содержаща подвижные стопоры, диафрагму и металлические пластины A hydraulic dornier head is known, containing movable stoppers, diaphragm and metal plates.

Недостатком такой дорнируюшей головки вл етс то, что в ней не предусмотрена защита от выдавливани материала упругой диафрагмы в зазоры между подвижными секторами.The disadvantage of such a dornier head is that it does not provide protection against the extrusion of material from the elastic diaphragm into the gaps between the moving sectors.

Наиболее близкой к изобретению вл етс гидравлическа дорнирующа головка , включающа подвижные секторы, размещенные на упругой трубчатой диафрагме , и металлические пластины, присоединенные к внутренней поверхности секторов 2 .Closest to the invention is a hydraulic dorning head, including movable sectors placed on an elastic tubular diaphragm, and metal plates attached to the inner surface of sectors 2.

Недостатком этой дорнируюшей головки вл етс ее ненадежность в работе ввиду отсутстви защиты против зате-The disadvantage of this mandrel head is its unreliability in operation due to the lack of protection against

кани материала диафрагмы в зазоры по кра м пластин. Кроме того, жесткое крепление пластин приводит к тому, что при наклоне секторов осевое усилие дорнировани передаетс на пластины, что приводит к их поломке или нарушению креплени .Can not material the diaphragm into the gaps along the edges of the plates. In addition, the rigid fastening of the plates leads to the fact that when the sectors are tilted, the axial force of dornification is transferred to the plates, which leads to their breakage or failure of the fastening.

Цель изобретени - повышение надежности головки в работе за счет предотвращени затекани материала диафрагмы в зазоры по кра м пластин.The purpose of the invention is to increase the reliability of the head in operation by preventing the diaphragm material from flowing into the gaps along the edges of the plates.

Указанна цель достигаетс тем, что между пластинами и диафрагмой установлены вьгступаюшиес за кра пластин проладки , а пластины присоединены к секторам с возможностью смешени , причем прокладки выполнены из плотной ткани, например брезента.This goal is achieved by placing protrusions over the edges of the plates between the plates and the diaphragm, and the plates are attached to the sectors with the possibility of mixing, and the gaskets are made of dense fabric, such as tarpaulin.

Claims

FIG. 1 iaobrbtskena dorniruyushchal head in the transport position, longitudinal section; in fig. 2 is a section A-A of FIG. one; in fig. 3 - the same at the moment of creating overpressure in the device; in fig. 4 - section B-B of FIG. 3. The dornier head has a hollow perforated rod 1, on which between the flanges 2 an elastic tubular diaphragm 3 with movable sectors 4 is placed on it, metal plates are attached to the supporting surface of each second sector 6, in which the screw holes in the plates are made with a gap sufficient for the plates to self-install relative to the supporting surface at any possible sector positions, and along the width of the plate extend beyond the lateral edges of the sectors by an amount b only than the maximum possible lateral gap between sectors, gaskets 7 made of dense fabric, such as tarpaulin, are attached to the plates from the diaphragm cores so that the edges of the fabric extend beyond the edges of the plates 6. A plaster 9 is installed in the repaired casing to the column 8 in a way. . When creating pressure in the tubular device, the diaphragm 3 expands and pushes the sectors 4 all the way into the bores of the flanges 2. The side gap formed between the sectors 4 is blocked by the projecting parts of the plates 6, which are pressed by the diaphragm to the supporting surfaces of adjacent sectors, and the edges of the gaskets 7 bend; closing the remaining gaps along the edges of the plates 6; When the head enters (or exits) the patch 9, sectors 4 are folded with respect to the axis of the head, B These moments of the plate 6 shift k 5 b 7 l V %%%% %%%% % along sectors 4, self-aligning with the support surface, and therefore the axial load of the dornirovany is not transmitted through the ends of the plates. All this increases the reliability of the dorning head. Claim 1 Hydraulic Dornier head for decompression plasters for casing repair, including moving sectors placed on an elastic tubular diaphragm, and metal plates attached to the inner surface of the sectors, in order to improve the reliability of the head by preventing diaphragm material flowing into the gaps along the edges of the plates, spacers protruding beyond the edges of the plates are installed between the plates and the diaphragm, and the plates are attached to sectors displacement capability. 2, the hydraulic dornuck head according to claim 1, characterized in that the pads are made of a dense fabric, for example a tarpaulin. Sources of information taken into account in the examination: 1. Sidorov, IA A. Restoring casing tightness in oil and gas wells, M., VNIIENG, 1972.

2. US Patent No. 2806534, cl. 166-98, 1957. %%%: 7 7