FIELD: mining.
SUBSTANCE: assembling point and method of energy twirling control are intended for eliminating interrupted motion and/or oscillations of a drilling bit including axial oscillations and/or angular oscillations around axis. According to one of the preferable options, the assembling point enables upper and lower tubular members of drill string to slip against each other. The assembly point of rotation control can be installed in any determined place in a drill string. The assembly point of rotation control can also be used as a component of other drill mechanisms such as a well engine for drilling. The device of rotation control provides slipping during drilling within the set time limits, within the limits of defined rotation angle of turning, or with due account of other criteria of twirling energy release in the drill string that otherwise can cause destructive discontinuous torsional oscillations, such as interrupted motion. According to one of the options, the assembly point of rotation control can incorporate a shift and a disengagement clutch. As a result, a torque will be fully transferred or not transferred through the assembly point within brief periods.
EFFECT: higher penetration speed during drilling; longer service life of drill bit; reduced pressure in joints of drill string.
31 cl, 13 dwg
