DEVICE FOR DIRECTED DRILLING OF WELLS Russian patent published in 2020 - IPC E21B7/08 

FIELD: soil or rock drilling.

SUBSTANCE: invention relates to directed well drilling and is intended for deflection and correction of well shaft direction when using projectile with detachable core receiver. Device for directed well drilling includes deflector with orienting device and housing with mechanism of deflector locking inside drilling string with crown. Deflector is made in the form of a spring-loaded rod with possibility of longitudinal movement on the length of the rod inside the housing. Outer diameter of the rod does not exceed the inner diameter of the crown, and the housing of the deflector is connected to the housing of the locking mechanism. Stem is equipped with hinge with possibility of deflection in one specified plane. Rod bottom end is provided with shaped shoe the profile of which has chamfer face, direction of which is opposite to direction of rod deflection. On the rod above the hinge with possibility of longitudinal sliding along the stock the bushing is installed, the external shape of which corresponds to the internal form of the crown, and the length of the rod is determined by the formula L_R=N/sinβ, where β Is rod deviation angle, degrees; N is the distance from the lower end of the rod to the axial line of the detachable deflector.

EFFECT: higher efficiency of artificial bending of well.

1 cl, 10 dwg