| 摘要 |
FIELD: mining. ^ SUBSTANCE: locking device of limiter includes tubular element having longitudinal axis and inner channel and is installed so that it can slide in tubular housing channel of tool and can retain actuating element of downhole device randomly in initial position inside drilling fluid flow passage in inner channel of tubular element. Besides, locking device includes sleeve of tubular ball locking device, which is rigidly retained in inner channel of tubular element so that limiter can enter it, and tubular insert located coaxially to sleeve of tubular ball locking device and adjacent to it. At that, sleeve of tubular ball locking device and tubular insert is made so that they ensure the possibility of fit and fixation of limiter so that its further movement along longitudinal axis of tubular housing of the tool is prevented. Inner channel of tubular element has expanded part located near parts of sleeve of tubular ball locking device and tubular insert. At least some part of sleeve of tubular ball locking device includes plastic material providing the outward offset of some part of sleeve of tubular ball locking device to expanded part of inner channel of tubular element after the limiter enters it. ^ EFFECT: improvement of device operating reliability. ^ 17 cl, 13 dwg |
