Horizontal well separate injection packer

• Main Authors: ZHANG YINGAN, SUN AIJUN, WANG FENG
• Format: Patent
• Language: Chinese; English
• Published: 02.12.2009
• 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 discloses a horizontal well separate injection packer which is characterized in that a centering device 2 comprising a cylindrical centering sleeve, centering claws and locating pins and the like is arranged on the outer pipe wall of a central pipe 7 between an upper connector 1 and an upper compression ring 3; and the 3 to 5 centering claws arranged corresponding to openings of the centering sleeve are uniformly distributed along the circumference of the pipe wall thereof. The horizontal well separate injection packer has reasonable structure, easy processing, convenient operation and reliable working. The horizontal well separate injection packer can be used for underground separate injection pipe columns and can be located in the center of a bushing when in setting due to the effect of the centering device 2, guarantee a glue cylinder 4 to uniformly release along the circumference and ensure reliable seal for a long time, thereby realizing water injection by layers (segments) of various h