Lever-pulley-triggered static pressure fishing device
A salvage device and trigger-type technology, which is applied in the direction of wellbore/well components, earthwork drilling and mining, etc., can solve problems such as difficulty in fishing for falling objects in the well, restrictions on fishing objects, etc.
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[0020] See figure 1 with figure 2 Shown:
[0021] The lever-pulley-triggered hydrostatic fishing device provided by the present invention includes an outer tube 1, an upper piston 2, a lower piston 3, and a contact rod 4. The upper piston 2 is arranged in the upper part of the inner cavity of the outer tube 1, and the lower piston 3 is arranged in the outer tube 1. In the lower part of the cavity, on the side wall of the 3 circumference of the lower piston, several V-shaped arms 7 are hinged through several pivot shafts 5. The V-shaped arms 7 can rotate around the pivot shaft 5, and the top of the V-shaped arms 7 is pivoted. There is an upper pulley 8, which is clamped in a slot formed on the inner wall of the outer tube 1. A lower pulley 9 is pivotally connected to the lower end of the V-shaped arm 7, and a guide rod 10 is fixed in the middle of the lower piston 3. The lower end of the guide rod 10 Equipped with a vertebral head 11, the vertebral head 11 can slide up and down ...
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