DOWNHOLE HYDRAULIC MOTOR Russian patent published in 2004 - IPC

FIELD: oil producing industry; drilling of directional wells.

SUBSTANCE: invention relates to downhole hydraulic motors with turbine deflectors. According to invention, hydraulic motor has hollow housing accommodating drive with rotor and spindle installed inside spindle housing on axial and radial supports, furnished with drilling bit and connected with rotor by drive shaft, motor and spindle housing being connected by curved threaded subs, and spindle are connected with drive shaft provided with driving and driven hinge units with axial sliding supports by means of threaded subs. Spindle housing is made with cross split between axial and radial supports from side of drilling bit. Spindle is provided with ring groove in plane of cross split of spindle housing, and split ring is installed in groove, diameter of split ring exceeding diameter of spindle. Support bushing and ring-catcher are secured inside spindle housing. Radial support of spindle housing from side of drilling bit is made in form of flexibly elastic sliding support located on detachable bushing and secured inside spindle housing. Distance between axial supports of driven shaft does not exceed length of axial support of spindle.

EFFECT: enlarged operating capabilities of downhole motor, reduced length of downhole drill string assembly, increased service life and improved reliability of downhole motor.

2 dwg