GUIDING DEVICE FOR ADDRESS DRILL STRING INTRODUCTION IN SIDE WELL BORE DURING WELL OPERATION Russian patent published in 2007 - IPC E21B23/03 

FIELD: oil industry, particularly means for setting the tools into, or removing the tools from, laterally offset landing nipples or pockets.

SUBSTANCE: guiding device comprises transporting tool with movement direction change mechanism including shaft. Connecting-rod with stem is suspended to the shaft by means of sleeve nut. Connecting-rod rotator having splined projections and annular groove is threadedly fastened to the shaft. Support washer is arranged between shaft end and splined projections of the rotator. Spring-loaded members brought into permanent contact with control-rod stem are installed in annular groove of the rotator. Control-rod is connected with ram-valve assembly by means of intermediate sub. Bush with fixing means, which provides tool entrance in side bore is arranged in ram-valve assembly body. The bush is retained in ram-valve assembly body with shear pin and terminates with partition having orifices and with pug secured to the partition and provided with fixer. Fixing means include body and die connected to inclined body surface with shear pin and fixer. Ram-valve assembly body and bush have common orifice.

EFFECT: increased efficiency.

2 dwg