SU1576686A1

SU1576686A1 - Removable bridge plug

Info

Publication number: SU1576686A1
Application number: SU884395675A
Authority: SU
Inventors: Ярослав Степанович Коцкулич; Богдан Андреевич Тершак; Николай Владимирович Сенюшкович; Ярослав Семенович Билецкий
Original assignee: Ивано-Франковский Институт Нефти И Газа
Priority date: 1988-03-21
Filing date: 1988-03-21
Publication date: 1990-07-07

Abstract

Изобретение относитс к креплению скважин. Цель - повышение надежности работы съемных мостовых пробок. Пробка включает корпус 1 с упорными шарами, удерживаемыми в радиальных окнах упругими элементами, управл ющий элемент в виде конического штока с уплотнительными упругими шарами по концам, расположенный в осевом канале корпуса 1, и разъединительный узел. Последний имеет самоуплотн ющуюс зубчатую манжету 9, закрепленную на корпусе, и патрубок с конической наружной поверхностью 8 и ножевым стопором 7 на нижнем конце. Пробку спускают в заданном интервале соединением корпуса 1 с трубами, сцеплением стопора 7 патрубка 8 с манжетой 9. Корпус 1 фиксируетс шарами в стенках скважины за счет движени штока 6 вниз под действием промывочной жидкости. Отсоединение корпуса от труб производитс нат жением и прорезанием стопором 7 манжеты 9. Съемка корпуса 1 производитс спуском патрубка 8 на трубах, сцеплением стопора 7 с манжетой 9, выталкиванием обратной промывкой конического штока 6 из зацеплени с шарами и соответственно освобождением корпуса от стенок скважины. 2 з.п. ф-лы, 2 ил.The invention relates to the fastening of wells. The goal is to increase the reliability of removable bridge plugs. The plug includes a housing 1 with thrust balls, elastic elements held in radial windows, a control element in the form of a tapered rod with end-sealing elastic balls located in the axial channel of the housing 1, and an isolating unit. The latter has a self-sealing serrated cuff 9 attached to the body and a nozzle with a conical outer surface 8 and a knife stopper 7 at the lower end. The plug is lowered in a predetermined interval by connecting the body 1 with the pipes, the coupling of the stopper 7 of the nozzle 8 with the cuff 9. The body 1 is fixed by balls in the borehole walls due to the downward movement of the rod 6 under the action of the washing liquid. The body is disconnected from the pipes by tensioning and cutting by the stopper 7 of the cuff 9. The housing 1 is removed by lowering the pipe 8 on the pipes, coupling the stopper 7 to the cuff 9, pushing back the conical rod 6 out of engagement with the balls and, accordingly, releasing the body from the borehole walls. 2 hp f-ly, 2 ill.

Description

Фиг. 2FIG. 2

Claims

Claim

1. A removable bridge plug, comprising a housing with an axial channel and radial windows, in which ball joints are placed with elastic elements placed in the axial channel of the housing, coaxially with it, a control element with a conical surface and a disconnecting unit, characterized in that, for the purpose of to increase the reliability of operation, the control element is made in the form of two sealing balls of elastic material mounted on the ends of the conical rod, installed with the possibility of limited movement and interaction in the lower position with ball joints, and the disconnecting unit is made in the form of a pipe with a conical outer surface with a knife stopper at the lower end and a self-sealing ring rigidly mounted in the upper part of the housing with the possibility of interaction with the knife stopper.

2. The cork according to claim 1, characterized in that rubber is used as the elastic material of the ball ^: ditch of the control element.

e

3. The cork according to claim 1, characterized in that the self-sealing ring is made in the form of a gear cuff.

(Riga 2