The invention discloses a
tail assembly for underground
data transmission and a connecting method thereof. The
assembly comprises a two-wing connector body, a semi-ring, a blocking piece and a rotating ring. The
electronic instrument transmits data to the conventional MWD through the transmission shaft in the two-wing joint body; the two-wing joint body is step-shaped, a small section is provided with a positioning plane, a large section is provided with a two-wing
flange, and axial and circumferential positioning is realized; and the rotating ring is rotationally sleeved on the middle section, is provided with threads, and is axially limited by the large-section stepped end surface, the separation blade and the semi-ring. The connecting method comprises the following steps: rotationally sleeving the rotating ring into the middle section of the two-wing joint body, mounting the baffle and the semi-ring, and fixing the semi-ring by using the screw to limit axial movement; the positioning plane is aligned with the positioning plane of the
electronic instrument shell, the rotating ring is rotated to achieve tightening, the rotating ring is fixed through the fixing screw, and accurate positioning and looseness prevention are achieved. According to the invention, the problems of transmission, connection reliability and positioning of
wireless signals across the screw motor are solved, and the real-time performance and
shock resistance of
signal transmission are improved.