BOTTOM-HOLE TELEMETERING SYSTEM Russian patent published in 2002 - IPC

FIELD: well drilling, means for transmission of signals from well to surface during drilling. SUBSTANCE: bottom-hole telemetering system has body, generator and device for fastening generator to system body. Generator consists of rotor and stator made with fixed axle having recess with flats and its end has electric connector. Device for fastening of generator to system body is made in the form of collet accommodating conical split bushing tightened by internal nut fixed with locking washer. Collet is protected from turning and axial motion in system body and made with cylindrical bore and has through recess. Conical bushing has shoulders, and it is made of two halves and installed on stator axle. Internal profile of conical bushing shoulders coincides with profile of recess with flats of stator axle. Internal nut serves as a remover in generator dismantling. Collet is fixed from turning and axial motion in system body by key and external nut. Made inside of system body is longitudinal recess and key is made in the form of plate entering internal recess inside system body and through recess in collet. EFFECT: reliable fastening of generator, its rapid mounting and dismantling in system body. 2 cl, 9 dwg