Salvage tool special for oil field and using method thereof

Abstract

The invention discloses a salvage tool special for an oil field and a using method thereof, and relates a salvage device. A drill rod accommodating cavity is formed in the upper portion of an inner cavity of a salvage barrel, a supporting plate is arranged between the lower parts of two supporting rods; the lower part of the inner cavity of the salvage barrel is divided into a salvage accommodating cavity by the supporting plate, a strong magnet is arranged on the lower surface of the supporting plate, a clamping ring is arranged on the upper portion of the salvage barrel and fixedly connectedwith the salvage barrel through the two supporting rods penetrating out of the upper portion of the salvage barrel, the portions, penetrating out of the upper portion of the salvage barrel, of the two supporting rods are sleeved with reset springs respectively, and a right movable plate and a left movable plate are arranged on the two sides of the lower portion of the salvage barrel respectively.According to the invention, mud and sundries in the well can be effectively prevented from entering the inner cavity of the salvage barrel in advance when the directional well extends into the salvage operation; and when the salvage barrel is pulled out, metal fragments or other sundries in the inner cavity of the salvage barrel are effectively prevented from falling back into a well, great convenience is provided for salvage operation of the directional well, and the salvage difficulty of workers is greatly reduced.

Description

technical field [0001] The invention relates to a fishing device, in particular to a special fishing tool for oil fields. Background technique [0002] As we all know, directional well is a well that deviates a certain distance from the vertical line of the wellhead in a given direction according to human needs. Directional well technology is one of the most advanced drilling technologies in the field of petroleum exploration and development in the world today. Downhole tools, measuring instruments and technology effectively control the trajectory of the wellbore, so that the drill bit can drill in a specific direction to reach the predetermined target underground. [0003] In oil and water well workover operations, some sundries often appear in the wellbore, such as irregular slip fragments produced by the bridge plug fracturing process, which are scattered in the wellbore with the flushing of water flow, causing subsequent downhole tools to be blocked, It is impossible ...

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Problems solved by technology

[0003] In oil and water well workover operations, some sundries often appear in the wellbore, such as irregular slip fragments produced by the bridge plug fracturing process, which are scattered in the wellbore with the flushing of water flow, causing subsequent downhole tools to be blocked, It is impossible to pass through, which affects the construction and increases the construction cost. Especially when salvaging in the directional well, the ordinary oil well overhauler is still used to salvage the fallen metal fragments in the directional well, which is often caused by the insufficient flexibility of the fishing string It will lead to the failure of salvage, or even a stuck pipe accident, which will complicate the salvage work and cause a lot of trouble and workload to the salvage of metal fragments in oil directional wells, resulting in high construction costs, time-consuming and laborious for the metal fragment salvage operation

[0004] In the prior art, the public authorization announcement number is CN202990927U, a special strong magnetic fishing device for falling metal fragments in a directional well, which absorbs and fishes the metal fragments in the well through strong magnets and locking claws. However, during the fishing process, due to the open structure of the overshot cavity, the soil or other sundries in the well will enter the overshot cavity during the fishing process, and in severe cases, it will cover the strong magnets, resulting in weakened magnetic adsorption; in addition, during the salvage process, because the locking claws cannot be controlled, not only will it prevent metal fragments from entering the cavity of the overshot when it is extended into the salvage, but also when the overshot is pulled out, because it is not fixed, The debris or metal fragments in the overshot cavity still fall out, which brings inconvenience to the fishing operation of the directional well

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