ADJUSTABLE DEFLECTION DEVICE Russian patent published in 2004 - IPC

FIELD: drilling equipment, particularly for setting design drift angle of inclined or horizontal well shaft inclination.

SUBSTANCE: deflection device having connection thread arranged on end thereof comprises central rod with packing means and outer threads. Rod has bent part deviated at α angle. Arranged in front of rod is coupler sliding over rod along key or splines. Coupler has end teeth formed on one edge thereof. Straight sub contacting with coupler teeth is screwed on one end of the rod. Bent sub is screwed on another end of the rod. Bent sub has inner thread inclined at α angle to bent sub axis. Bent sub comprises end teeth cooperating with coupler end having teeth. Central rod is directed by bent part to bent sub so that central axes of sub and rod threads cross at single point and have common plane of bending.

EFFECT: increased well drilling accuracy.

4 dwg