DETACHING DEVICE Russian patent published in 2004 - IPC

FIELD: well boring technology.

SUBSTANCE: device has body, upper and lower adapters, first of which is connected to body by right-hand thread, and second - by left-hand thread with an assembly for its stopping and is made with a saddle for throw valve, and moveable rod located in body hollow and fixed in starting position from axial displacement and made with stepped outer and inner surfaces, the step of larger diameter of outer surface of which is located between upper and lower steps. Step of larger diameter of inner hollow of rod has diameter greater than outer diameter of upper portion of rod. Stopping assembly is made in form of radially mounted pins and spring-loaded bushing interacting with said pins, having threaded plugs, and mounted in combined channels of body and lower adapter. In starting position pins are limited in axial displacement by lower step of rod, and bushings are limited by plugs. Ends of bushings in contact with pins are made of convex form, for example, spherical, conical. Pins and channels for them are made of stepped form. Stopping assembly is placed below left-hand thread. Piston drive is greater than distance between lower end of piston and pins axis. Lower adapter is made on outer surface with thread for catching tools.

EFFECT: higher efficiency of device operation.

4 dwg