DEVICE FOR MOUNTING OF DEFLECTOR WEDGE IN WELL SHAFT Russian patent published in 2004 - IPC

FIELD: boring equipment engineering.

SUBSTANCE: device has supporting assembly with bracing members, lowering assembly with sub, extending member using the deflector wedge, in lower portion of which mounting tail is provided. Supporting assembly has body made in form of sections, bracing member made in sectional form and including piston and extending portion like bolt, broad portion of which has rectangular shape, and narrow portion is conical at the end. On side surface cutting teeth are provided made perpendicularly to axis of bracing member displacement, in rows in form of rectangular triangles, vertices of which are directed towards broad portion. On inner surface of body of supporting assembly a longitudinal shelf is made, lowering assembly has body in form of hollow cylinder with square inner surface, upper and lower portions of lowering assembly body on inner surface are made in form of truncated cones, in upper portion the sub is mounted, and in lower - thrust bearing. On outer surface of lowering assembly body longitudinal groove is made, which matches longitudinal shelf on body of supporting assembly, in bodies of supporting assembly and lowering assembly in horizontal plane through grooves are made, in which bracing members are placed. Mounting tail of the deflector wedge is made in form of cylinder with longitudinal groove in form of swallowtail and connected to body of wedge by means of thread made at angle α, which is determined as tgα=h/1, where h - space between wall of casing column and vertex of the deflector wedge in undeflected state, in millimeters, 1 - length of the deflector wedge body, in millimeters, and on surface of mounting tail spring elements are provided.

EFFECT: simplified construction, higher manufacturability of combined device.

6 dwg