METHOD FOR MOUNTING AND FASTENING OBJECTS INSIDE WELLS AND DEVICE FOR FASTENING AND MOUNTING OBJECTS IN WELLS (VARIANTS) Russian patent published in 2006 - IPC E21B23/00 E21B31/00 E21B47/00 

FIELD: oil and gas extractive industry, namely, method for mounting and fastening objects or devices in a well or flow string and variants of device for fastening objects in wells.

SUBSTANCE: in accordance to method, mounting and fastening of objects or devices in well or flow string is performed by dropping the support, connected to object, with spring-loaded drawbars and levers made with negative angles of wedging relatively to tubing string walls and positive angles of wedging relatively to walls of well of flow string, while opening, self-locking of levers, mounting and fastening of support inside the well or flow string is performed autonomously during exit of support from tubing string into well or flow string. Support consists of rod with catching head, connected to object, and at least one bushing, moveably mounted on the rod, and extendible elements. In accordance to one variant of support realization, extendible elements are made in form of levers having drawbars and negative angles of wedging relatively to body of lowering device or tubing string walls and positive angles of wedging relatively to walls of flow string, jointly connected to bushings of levers with drawbars. In accordance to a different variant, one of bushings of support is made in form of a support arm, and another bushing is made in form of slider with windows, also having a catching head. Device for fastening devices inside lifting pipes of wells consists of lowering device or delivering head and fastening device or support. Lowering device contains body, functional rod, positioned inside the body and made with variable cross-sections, extendible elements with a holder between them, positioned evenly around circumference of body. Inside the body of lowering device or delivering head a telecontrol system is mounted, while the body of fastening device is made in form of bushing with windows, and extendible elements are made in form of collet with blades mounted on the bushing with possible axial movement. Lowering device is made in form of releasing fishing tool consisting of body, replaceable gripping devices connected to body, telecontrol system mounted inside the body and containing device for movement of main rod, connected to functional rod. Device for mounting objects in a well includes body with gripping device in form of collet with blades, on which with possible arc movement and interaction with collet blades at least one holder is mounted, made in form of resilient wire or cam with drawbar.

EFFECT: increased reliability and efficiency when using devices supposed to mounted or fastened in wells due to expanded functional capabilities.

6 cl, 25 dwg