HYDRAULIC DOWNHOLE MOTOR WITH DIAMOND SLIDING SUPPORT Russian patent published in 2013 - IPC E21B4/02 

FIELD: engines and pumps.

SUBSTANCE: motor includes a housing with a rotor arranged inside it, the rotation of which is performed by the fluid medium supplied with a pump, as well as a spindle housing with a shaft arranged inside it, which is installed on radial and axial sliding supports. The spindle shaft is attached to the motor rotor and a bit. Some amount of fluid medium is pumped through radial and axial sliding supports, and axial support of the spindle is made in the form of two pairs of rotor and stator rings with an annular row of thrust modules, which is fixed in each of them. Stator rings are fixed in the spindle housing, rotor rings are installed on the spindle shaft, and each thrust module includes layers of polycrystalline diamonds on the edge facing the edges of adjacent modules, and contacts in turn with one or two edges of adjacent modules. The motor includes a splined bush with external splines, which is installed on the spindle shaft, and two elastic damping supports arranged on the edges of the splined bush and receiving axial forces acting on the axial support of the spindle. Each elastic damping support contacts the rear edge of the corresponding rotor ring with the fixed annular row of thrust modules, and rotor rings with annular rows of thrust modules fixed in them are provided with internal splines corresponding to external splines of the splined bush, and each of them is installed with possibility of annular distortion of the rotor ring with the annular row of thrust modules, which is fixed in it, relative to its own elastic damping support.

EFFECT: increasing service life and improving reliability of the axial sliding support of the spindle of the hydraulic downhole motor with thrust modules; improving accuracy of curvature parameters of the well shaft; enlarging the hole boring per bit run using hydraulic jars in the tubing; increasing the increase rate of curvature parameters of wells, and reducing stresses in the layout of the bottom of the drill column and downtime of the drilling unit.

6 cl, 5 dwg