Coiled tubing external cutting and fishing integrated device

Abstract

The invention discloses a coiled tubing external cutting and fishing integrated device, which includes a barrel body. The inner side of the barrel body is successively provided with a clamping mechanism, a boosting mechanism and a cutting mechanism. The clamping mechanism comprises a sliding block slip and a trapezoidal taper groove, the boosting mechanism includes a hydraulic boosting piston, a trapezoidal groove and a limiting groove, the position of the trapezoidal groove corresponds to the trapezoidal taper groove, the limiting groove limits an up-down moving stroke of the hydraulic boosting piston, and a piston reset structure is arranged between the hydraulic boosting piston and the limiting groove; the cutting mechanism comprises a plurality of blade chambers arranged in the circumferential direction of the barrel body, the blade chambers are internally provided with blades through a pin shaft, and the blade chambers are further internally provided with blade reset structures; and the end, facing toward the blades, of the hydraulic boost piston is provided with a guiding inner cone face. According to the coiled tubing external cutting and fishing integrated device, cutting and fishing are completed through an up-lifting and down-placing operation with a hydraulic pump, integration of cutting and fishing from the outer side of a coiled tubing is realized, the processing progress of stuck tubing is accelerated, the risk of oil-gas well abandonment is lowered, the structure is simple, and control is reliable.

Description

technical field [0001] The invention belongs to the technical field of fishing tools, and in particular relates to a coiled tubing external cutting and fishing integrated device. Background technique [0002] In the process of oil testing and workover operations, in order to speed up the completion operation speed and shorten the completion operation time, coiled tubing is usually used to complete operations such as well drilling, scraping pipe, and pipe wall cleaning at one time. Due to downhole complexity or other reasons, once the coiled tubing is stuck, the coiled tubing cannot be rotated and its inner diameter is small, so methods such as explosive cutting and internal cutting cannot be used to remove it. Only by vigorously moving up and down can the jam be released. However, due to the stress concentration on the wellhead or the tool catch position, the coiled tubing may break from the wellhead and the tool catch position, and the salvage progress is slow and even the ...

AI Technical Summary

Problems solved by technology

However, due to the stress concentration on the wellhead or the tool catch position, the coiled tubing may break from the wellhead and the tool catch position, and the salvage progress is slow and even the oil and gas well is scrapped

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