A contrary device that ends for small casing well cementation, shutoff

• Main Authors: PAN TAO, DU LIANGHUI, WANG RENQIAN, WANG XIUSHUAI, HAO JIANGUANG, HU LIANGLIANG
• Format: Patent
• Language: Chinese; English
• Published: 23.11.2016
• 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 contrary device that ends for small casing well cementation, shutoff, including center tube, sealed bowl, the sealed gum cover of gluing, sealed bowl, the sealed gum cover of gluing of center tube outside suit, sealed gum cover is located the sealed bowl top of gluing, surrounds the side through -hole outside of seting up on the center tube simultaneously. The sealed bowl skeleton of gluing is still installed outward to the center tube, a sealed gluey bowl skeleton lower extreme passes through screw mode suit and inserts the sealed bowl inlayer of gluing on center tube lower extreme, well upper portion. The sealed motionless skeleton of gum cover of suit is gone back outward to the center tube, sealed gum cover inlayer is inserted to the lower part in the sealed motionless skeleton of gum cover. Sealed gum cover inlayer still is provided with sealed gum cover activity skeleton. The utility model discloses return the small casing inner chamber no longer against the current after c