GEROTOR HYDRAULIC MOTOR Russian patent published in 2022 - IPC E21B4/02 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to hydraulic drives for rotary drilling containing deflecting devices that set the design angle of curvature of a directional well. The motor contains a tubular housing, a multi-entry screw gerotor mechanism placed inside it and a spindle section, including a spindle section housing, a spindle section shaft, a drive shaft, as well as a twist angle regulator located between the motor and the spindle section housings, including a hollow curved shaft with external longitudinal slots and threads on its edges, straight and curved tubular adapters, misaligned with each other, fastened with a hollow curved shaft with the thread, toothed coupling with internal longitudinal slotted grooves and teeth on the side of the end, directed to the end of the curved tubular adapter, mounted on the outer longitudinal slots of the hollow curved shaft between the straight and curved tubular adapters, and on the side of the end of the curved tubular adapter directed to the toothed coupling, teeth are engaged with the teeth of the toothed coupling. The central axes of the thread of the straight and curved tubular adapters are located in the same plane and have the same direction of skew. The motor contains the adapters of the drill string and the motor, and between them a hinged coupling and an adjacent coupling of the position of the plane of the skew, located upstream from the motor inlet. The hinge coupling contains a hollow body fastened to the drill string adapter with threads on the edges directed to each other, as well as a hollow shaft with a spherical carrying cushion and a threaded shank, made with the possibility of fastening to the motor adapter, a spherical support, mechanical seals of the spherical carrying cushion of the hollow shaft. The hollow housing of the hinge coupling on the side facing the coupling of the skew plane position, the coupling of the skew plane position on both sides, as well as the motor adapter on the side facing the coupling of the skew plane position, are equipped with contacting elements with the possibility of transmitting the torque of the drill string, made in the form of a protrusion-groove connection, and the spherical carrying cushion of the hollow shaft is placed inside the hollow housing of the hinge coupling. The contacting elements of the coupling of the skew plane position and the hollow housing of the hinge coupling are made in the form of a protrusion-groove connection located in planes parallel to their central axes on edges directed to each other. The contacting elements of the coupling of the skew plane position and the motor adapter are made in the form of a protrusion-groove connection, equidistant in a circumferential position relative to their central axes on the edges directed to each other. The central axes of the thread of the adapters of the drill string and the motor, the straight and curved tubular adapters of the skew angle regulator placed between the motor and the spindle section housings are located in the same plane with the same direction of skew.

EFFECT: invention provides an increase in the accuracy of drilling directional wells, a reduction in stresses in the drill string, as well as an increase in the drilling efficiency of the curved interval of the well.

2 cl, 10 dwg