Cluster sliding sleeve staged fracturing well completion pipe string and construction method thereof

• Main Authors: HAO GUIXIAN, LU HUI, LUO HONG, JIN SHENG, QU QINGLI, LIU YANLI, QU YONGLIN, WANG PEI, WANG XIAOMEI
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2023
• 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 cluster sliding sleeve staged fracturing well completion pipe string comprises a float collar, a first-stage sliding sleeve unit, a second-stage sliding sleeve unit,..., and an Nth sliding sleeve unit which are sequentially connected through sleeves from bottom to top; each stage of sliding sleeve unit has the same structure and comprises a section sliding sleeve and a plurality of cluster sliding sleeves with the same structure which are sequentially connected through a sleeve from bottom to top, and a sealing pitching ball matched with the inner diameter of a central channel of the section sliding sleeve and the cluster sliding sleeves; the inner diameter of the central channel of each stage of sliding sleeve is gradually increased from bottom to top, and the diameter of the sealing ball matched with each stage of sliding sleeve is gradually increased from bottom to top; according to the cluster sliding sleeve staged fracturing well completion pipe string, infinite fracturing operation can be achieved w