Injection Well Plug Release Fishing Device

Abstract

The invention discloses a fishing device for releasing a plug in a water injection well, which includes a connecting head, an outer cylinder, a releasing head, and a fishing head. The upper and lower through-type cylinder structure, the upper end of the fishing head is connected with the lower end of the connecting head with a threaded button, and at least three fishing head expansion slots are opened from the lower end of the fishing head; the upper half of the expansion rod is connected with the connecting head The threaded hole in the center of the center threaded hole is threaded, and the lower half of the expansion rod extends into the fishing head. The inner wall of the fishing head is provided with an expansion boss, and the inner diameter of the expansion boss is smaller than the outer diameter of the lower end of the expansion rod. The inner wall of the lower end of the head is provided with a fishing head hook hanging table for blocking the umbrella-shaped hanging table fishing rod of the stopper, and a release head is arranged in the space between the inside of the outer cylinder and the outside of the fishing head. The invention can simultaneously complete the work of putting in the blocker in the water distributor of one layer and pulling out the blocker in the water distributor of the other layer at the same time by going down the well once.

Description

technical field [0001] The invention relates to the technical field of replacing plugs in water distributors of layered water injection wells in oil fields, in particular to a plug release and fishing device for water injection wells. Background technique [0002] At present, during the construction process of replacing the plugs in the layered water injection wells, the fishing devices used only have a single function of throwing or fishing. Lifting out of the wellhead, and then repeatedly lowering and lifting the fishing device can complete the replacement construction of the plug, and the plugging head on the previous fishing device often fell off when the plug was inserted, and the fishing head was also unreasonable because of the unreasonable design. , the reliability of use is poor, and the plug cannot be removed, resulting in repeated construction and affecting oil field production. [0003] Application number: 201721299316.0, public date 2018-05-04 discloses the plu...

AI Technical Summary

Problems solved by technology

[0002] At present, during the construction process of replacing the plugs in the layered water injection wells, the fishing devices used only have a single function of throwing or fishing. Lifting out of the wellhead, and then repeatedly lowering and lifting the fishing device can complete the replacement construction of the plug, and the plugging head on the previous fishing device often fell off when the plug was inserted, and the fishing head was also unreasonable because of the unreasonable design. , the reliability of the use is poor, and the plug cannot be removed, resulting in repeated construction and affecting oil field production

[0003] Application number: 201721299316.0, public date 2018-05-04 discloses the plugging head and the plugging device using the plugging head to solve the problem of the small clamping area of ​​the pressing head in the prior art. Problems that cause the stopper to fall off easily

Images