Центральна Науково-Дослідна Лабораторія Виробничого Об'Єднання "Укрнафта"
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Priority to UA4870285ApriorityCriticalpatent/UA19116A/en
Publication of UA19116ApublicationCriticalpatent/UA19116A/en
Appliance for disconnection of annular space of well has hollow body, support shoe with stopper that is rigidly connected to body. Appliance is equipped with wedge-like sealing elements that are placed at outer ends of segments and connected to those with shear elements. Segments are spring-supported with respect to shoe with spring placed in is circular reboring. Elastic sealing element is arranged as diaphragm connected to shoe and segments.
UA4870285A1990-10-011990-10-01Appliance for disconnection of inter-pipe space of well
UA19116A
(en)