METHOD FOR CONTROLLING THE POSITION OF CURVATURE PLANES OF A GEROTOR ENGINE WHEN DRILLING DIRECTIONAL WELLS Russian patent published in 2022 - IPC E21B7/06 E21B47/02 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to methods for controlling the position of the planes of curvature of hydraulic drives placed in the well, containing deflecting devices that set the design angle of curvature of the directional well. The method for controlling the position of the curvature planes of a gerotor motor when drilling directional wells includes transporting a drilling assembly in a wellbore using a drill string from a surface location. The vertical wellbore is drilled to a predetermined depth, the drilling assembly is raised to the surface using a drill string. The teeth are disengaged from the side of the end face of the gear coupling and the teeth of the curved tubular sub, the gear coupling is rotated relative to the curved tubular sub until the identical marks of the design misalignment angle at the bottom of the longitudinal grooves on the surface of the gear coupling and the curved tubular sub coincide. The teeth are engaged from the side of the end face of the gear coupling and the teeth of the curved tubular sub, the threaded connection of the curved shaft and the straight tubular sub are fastened, while the threaded connection of the hollow shaft with the spherical support heel and the threaded shank in the clutch of the position of the skew plane is unfastened until a gap appears in the annular joint between the contacting elements of the skew plane position clutch and the motor adapter. The skew plane position clutch is disengaged from the contacting elements of the engine adapter, made in the form of a protrusion-groove connection and equally spaced in the circumferential position. The skew plane position clutch is rotated and matching marks of identical values of the design skew angle are transferred at the bottom of the longitudinal grooves on the surface of the toothed clutch and the curved tubular sub onto the surface of the skew plane position clutch. The skew plane position clutch and the motor thread adapter are engaged by the contacting elements into position. When on the surface of the coupling of the position of the plane of misalignment, the mark, symmetrically located relative to the mentioned contacting elements, coincides with the marks of identical values of the design angle of misalignment on the surface of the gear coupling and the curved tubular sub in the misalignment angle regulator, the hollow shaft is fastened to the spherical support heel and the threaded shank of the coupling of the position of the plane skew with threaded motor adapter. The threaded adapter of the drill string is fastened to the drill pipe, the drill pipes are fastened one by one, the drilling assembly with the drill string is lowered into the wellbore and drilling of the well is continued.

EFFECT: invention improves the accuracy and speed of drilling directional wells, reduces the stress in the drill string, and also increases the "permeability" - the possibility of drilling directional wells with a set angle of 50 to 60° per 30 meters of penetration.

2 cl, 11 dwg