METHOD OF CONTROL OF POSITION OF DEFLECTOR IN SIDETRACKING OF WELL INCLINED SECTIONS AND DEVICE FOR ITS EMBODIMENT Russian patent published in 1997 - IPC

FIELD: oil producing and other industries; applicable in sidetracking on inclined sections from vertical wellbore for precise orientation of drill bit deflector. SUBSTANCE: controlled deflector is connected to controlling device with inclinometer. Controlling device is preliminarily oriented by marks in the same plane with deflector by stepless turning of treaded surface of the upper centralizer of inclinometer and seating socket of inclinometer assembly whose bottom is made in form of pipe bevel changing into longitudinal recess engageable with projections of sealing socket. Then, inclinometer assembly with magnetic transducer is lowered down to arriving of signal on seating of its pipe bevel on the projection of seating socket and fixed from axial motion. Current measurements of zenith angle and azimuth are compared continuously with the preset values, and they are corrected by varying the bit load and flow rate of drilling mud. EFFECT: higher efficiency. 4 cl, 4 dwg