Multi-force actuation packer

• Main Authors: BUQIANG ZHOU, CUIFANG HAN
• Format: Patent
• Language: English
• Published: 02.08.2006
• 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 multi-force actuation packer, which is composed of an upper joint, an upper and a lower protecting caps, an upper sealing barrel, a positioning sleeve, a central tube, a compression spring, a thrust loop, a front and a rear pistons, a sealing ring, a double-purpose piston, a shearing nail, a steam-intake loop, an upper and a lower hydraulic cylinders, a large sealing sleeve, a bracket, an expanding agent, a positioning steam-intake loop, a locking loop, etc. A first level sealing body is composed of the upper joint, the upper protecting cap, the upper sealing barrel and the thrust loop; a second level sealing body is composed of the lower protecting cap, the upper sealing barrel and the thrust loop; a first level expanding chamber is composed of the front piston, the sealing ring, the expanding agent and the double-purpose piston; a second level expanding chamber is composed of the rear piston, the expanding agent, the sealing ring and the double-purpose piston; a first level unsealing device is composed of the positioning sleeve, the compression spring and the front piston; the second level unsealing device is composed of the bracket, the compression spring and the rear piston. The utility model solves the sealing problem of the existing steam-injecting packer and improves steam-injecting effect and the packer is suitable for the construction of a steam-vomiting well, a steam-driving well and a thermal production well with layer-separating steam injection.