Horizontal well fastener-unlatching salvaging device and fastener-unlatching salvaging method thereof
A fishing device and horizontal well technology, which is applied in the direction of earthwork drilling, wellbore/well parts, etc., can solve the problems of unblocking in horizontal wells, solve eccentric wear sidetracking and safety problems, reduce friction, and improve work efficiency. efficiency effect
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[0006] Specific embodiment 1: (see FIG. 1 ) the horizontal well jam release and fishing device in this embodiment consists of a milling tool 1, a safety joint 2, a power drilling tool 3, a first centralizer 4, a straight screw 5, a second centralizer 6, The inclined drill pipe 7, the weighted drill pipe 8 and the drill pipe 9 are composed. One end of the milling tool 1 is connected with one end of the safety joint 2, and the other end of the safety joint 2 is connected with one end of the power drilling tool 3. The power drilling tool 3 The other end of the first centralizer 4 is connected to one end of the first centralizer 4, the other end of the first centralizer 4 is connected to one end of the straight screw 5, the other end of the straight screw 5 is connected to one end of the second centralizer 6, and the second The other end of the centralizer 6 is connected with the lower end of the inclined drill pipe 7 , the upper end of the inclined drill pipe 7 is connected with t...
Example Embodiment
[0007] Specific embodiment 2: (refer to FIG. 1 ) the horizontal well removal and salvage method of the present embodiment is realized by the following steps: firstly, the composite driving, grinding, milling and unlocking pipe string is run down, and the milling tool 1 reaches the upper part 1 of the fish head (well drop). ~2m, start circulating workover fluid, and the displacement of workover fluid is 0.4~0.6m 3 / min, the pump pressure is 10 ~ 13Mpa, gradually lower the composite drive, milling, and release the stuck pipe string to the fish head, until the sand in the upper part of the falling object (fish head) is washed clean, the power drilling tool 3 starts to work and drives the lower part. The milling tool 1 starts to work; at the same time, the turntable is started to make the drill pipe 9 drive the weighted drill pipe 8 and the slope drill pipe 7 to start working. The rod 7 is driven at the same time, that is, the compound drive; in the process of drilling, grinding a...
Example Embodiment
[0008] Embodiment 3: The displacement of the workover fluid in this embodiment is 0.5m 3 / min. Others are the same as in the second embodiment.
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