Casing pipe screwed joint for rotary well cementation

• Main Authors: LUO RIXIN, HE HONG, LUO LIQIANG
• Format: Patent
• Language: Chinese; English
• Published: 25.01.2022
• 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 utility model relates to a casing screwed joint for rotary well cementation, which comprises a pipe and a coupling, the pipe and the coupling share the same axis, two ends of the pipe are necked down, and external threads, an external sealing conical surface, a male buckle inclined circular bead and a male buckle inclined end surface are processed on the outer wall after the two ends of the pipe are necked down; the coupling is arranged in a bilateral symmetry mode along the middle face, and the two ends of the coupling are provided with internal threads, combined sealing faces, a first female buckle inclined circular bead and a second female buckle inclined circular bead. According to the casing pipe screwed joint for rotary well cementation, the coarse thread design is adopted, the thread strength is high, and the torsion resistance is high; by arranging the two reverse torque shoulders, the torsion resistance and compression resistance of the connector can be further improved, and the effect of high to