SEPARATOR Russian patent published in 2004 - IPC

FIELD: well drilling technology.

SUBSTANCE: device has body, upper and lower reducers, first of which is connected to the body by means of the left, and second is connected by means of left thread to assembly for its stopping and made with saddle for throw valve, and moving rod placed in body hollow, fixed in starting position from axial displacement and made with step outer and inner surfaces, step of large diameter of outer surface of which is placed between upper and lower steps. Step of large diameter of inner hollow of rod has diameter greater than outer diameter of upper step of rod. Body and lower reducer are made with combined through radial channels and stopping assemblies placed in them, each of which is made in form of spring-loaded finger with ring clamp and holder forming an operating chamber for placement of spring and connected to inner hollow of lower reducer by a channel covered in starting position by a lower step of the rod. The latter is concurrently used for limiting axial displacement of fingers. Radial channel in lower reducer and finger holder are made in form of screw pair. Radial channels in lower reducer and fingers placed in them are made with congruent step surfaces. Body and lower reducer are made with additional left thread, and stopping assembly is placed along height between two left-hand threads. Lower reducer is made on inner surface with thread for catching tool, and thread is placed higher than stopping assembly.

EFFECT: higher reliability of operation.

5 cl, 2 dwg