Non-rigid casing centralizer for well cementation

• Main Authors: SUN MENG, FU ZHENJIU, WANG HAIBO, CHEN YINGYING, ZHAO LEI, WU WENZHANG, JIANG MIAOMIAO
• Format: Patent
• Language: Chinese; English
• Published: 02.09.2022
• 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 provides a non-rigid casing centralizer for well cementation. The casing centralizer comprises a core cylinder matched with a casing, a centralizing cylinder and an elastic piece, wherein the centralizing cylinder and the elastic piece are arranged on the core cylinder in a sleeving mode. The core cylinder comprises a cylinder body and baffle ring assemblies arranged at the two ends of the cylinder body respectively, a buffer gap is formed between the centralizing cylinder and the baffle ring assemblies, a rolling body is arranged on the outer wall face of the cylinder body, and the inner wall face of the centralizing cylinder makes contact with the surface of the rolling body. A spiral guide rib is arranged on the outer wall face of the centralizing cylinder, the elastic piece is arranged in the buffering gap, and the elastic piece can abut against the centralizing cylinder and the baffle ring assembly so that the centralizing cylinder can move along the axis of the cylinder body under the