Packer

Abstract

The invention discloses a packer. The packer comprises a hydraulic cylinder, an inner cylinder sleeve is arranged on the inner side of the hydraulic cylinder, an outer cylinder sleeve is arranged on the outer side of the hydraulic cylinder, the hydraulic cylinder can slide relative to the inner cylinder sleeve and the outer cylinder sleeve to bear an upper short section and a lower short section of the hydraulic cylinder, a rubber barrel capable of expanding and retracting is further arranged on the outer side of the outer cylinder sleeve, and an expansion chamber is formed between the rubberbarrel and the outer cylinder sleeve; an annular cutting groove is formed in the position, close to the lower short section, of the inner side wall of the outer cylinder sleeve, and a first chamber isformed in the annular cutting groove; a valve element is connected to the position, on the outer side of the hydraulic cylinder, of the interior of the first chamber in a sleeved mode; a track grooveis formed in the annular protruding inner side wall, and a protruding rod is arranged on the hydraulic cylinder to guide the hydraulic cylinder to move up and down and rotate in the circumferential direction at the same time under the action of external force; and thus automatic setting and unsealing of the packer are realized. The packer controls setting and unsealing only needing improving system pressure, simpleness and convenience are achieved, and working time is shortened.

Description

technical field [0001] The invention belongs to the field of oilfield downhole tools, and in particular relates to a packer. Background technique [0002] In the process of oilfield development, it is usually necessary to use a packer to realize setting and unsealing, and the packer can be divided into: self-sealing type, compression type, wedge type, expansion type, combined type, etc. according to the sealing principle. Divided into: lifting string type, rotating string type, self-sealing type, thermal expansion type, etc.; however, the packer cannot achieve multiple setting seals in the oil well. The post unlocks the locking ring, which makes the process irreversible. Even if some packers can achieve multiple sealing, the process of achieving sealing and unsealing is too cumbersome, which will reduce the progress of oilfield development; therefore, there is an urgent need for a packer that can achieve multiple sealing and is simple to control. Contents of the invention...

AI Technical Summary

Problems solved by technology

[0002] In the process of oilfield development, it is usually necessary to use a packer to realize setting and unsealing, and the packer can be divided into: self-sealing type, compression type, wedge type, expansion type, combined type, etc. according to the sealing principle. Divided into: lifting string type, rotating string type, self-sealing type, thermal expansion type, etc.; however, the packer cannot achieve multiple setting seals in the oil well. The cylinder unlocks the locking ring, which makes the process irreversible

Even though some packers can achieve multiple sets, the process of setting and unsealing is too cumbersome, which will reduce the progress of oilfield development; therefore, there is an urgent need for a packer that can achieve multiple sets and is simple to control

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