Step-by-step unsealing packer

• Main Authors: ZHAO JIANZENG, WANG ZHIQING, JIAO MINGYUAN, JI JIANGUO, ZHENG GENYE
• Format: Patent
• Language: Chinese; English
• Published: 09.06.2023
• 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 packer comprises an upper connector, one side of the upper connector is in threaded connection with an upper backwashing sleeve, an upper center pipe is arranged in the upper backwashing sleeve in a penetrating mode, a backwashing piston is arranged in the upper backwashing sleeve, a pressing cap is arranged on the outer wall of the upper center pipe, and a sealing ring is arranged between the pressing cap and the backwashing piston. A pressing ring is arranged on the outer side, located on one side of the upper backwashing sleeve, of the upper central pipe, a rubber sleeve is arranged on the outer wall of the pressing ring, and an expansion pad is arranged on the surface of the rubber sleeve. The step-by-step deblocking packer has the beneficial effects that the friction force between the step-by-step deblocking packer and the well wall can be greatly improved through the locking teeth, so that the problem that the step-by-step deblocking packer falls off from the well wall is solved, the stability of co