| 摘要 |
FIELD: mining.SUBSTANCE: invention relates to mining and can be used to create spherical cavities in rock masses. Device for formation of spherical expansions in wells includes a housing with a unit for communication with a drive for rotating housing around its longitudinal axis, working members with external cutting edges arranged in housing to extend beyond its limits. Working members are made in form of elastic plates forming ellipses combined by large axes to each other and longitudinal axis of housing. External cutting edges of working members are made in form of inserts, installed on external sides of elastic plates with possibility of retaining shape during deformation of elastic plates. Housing has longitudinal through slots, in which working members are inserted. Unit for communication with drive for rotating housing around its longitudinal axis is made for restricted longitudinal movement inside housing and to extend working members beyond housing forms with support of device, attached to end of housing, a mechanism for compression of ellipses along their major axes. Ellipses are mechanically coupled with support and said communication unit and are arranged between them.EFFECT: reducing operations for preparation of device for operation and enabling extraction thereof from well regardless of stage of formation of cavity.6 cl, 5 dwg |
