Rotary steering tool for directional petroleum drilling

• Main Author: ZHANG JINLEI
• Format: Patent
• Language: Chinese; English
• Published: 09.04.2019
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention discloses a rotary steering tool for directional petroleum drilling. The rotary steering tool comprises an outer barrel, wherein a drill bit is arranged on the lower side of the outer barrel, a mandrel is arranged in the outer barrel, a sleeve is arranged on the mandrel, a guide bar is glidingly connected in the sleeve, a rotary plate is arranged on the other side of the guide bar and hinged to a hinge seat which is arranged on the mandrel, a spring is arranged at the other end of the rotary plate, the other end of the spring is fixedly connected outside the mandrel, a universaljoint is arranged on the upper side of the mandrel and arranged in the outer barrel, a slider is arranged on the outer side of the outer barrel and glidingly connected to a fixed barrel through a chute, the spring is arranged on the lower side of the slider and limited in the chute, a drill string is arranged on the upper side of the fixed barrel, and a push rod is arranged on the upper side of the outer barrel. The rotar