| In the course of operating oil and water wells, because of casing deformation, sand, wax and other reasons leading to guitar string card and was unable to continue production. Releasing stuck and Fishing are one of the cards an effective solution. In order to fishing of card technology and better application of the various regions, the paper in two areas of work, according to 4(1/2)″casing wells string of specifications and tools, developing the technical programme for activating, bumping, breakout, abrasive milling and other measures to be combined. Matching drilling tools, developing the releasing stuck and fishing tools and string. According to 4(1/2)″casing wells need of reshaping, developing the reshaping and enlarging technology for the machinery and bulging and abrasive milling to be combined. |
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