Trajectory slideway-type pressure relief switch
A slideway and trajectory technology, which is applied in the direction of wellbore/well components, earthwork drilling and production, sealing/isolation, etc., can solve the problems of construction failure and easy upward string movement of tubing, and achieve unique trajectory design and avoid radial The effect of exposed vias
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[0027] As shown in the figure, the track slideway pressure relief switch includes an outer sleeve 2 and a track core tube 3 arranged in the outer sleeve 2. The number of the outer sleeves 2 is two, and a slide is used between the two outer sleeves 2 The column collar 4 is connected and fixed, the upper end of the upper outer casing 2 is threaded with the upper joint 1, the lower end of the lower outer casing 2 is threaded with the lower collar 6, and the track core pipe 3 is composed of the upper thick-diameter cylindrical section 13 and the lower Small-diameter cylindrical section 14 is composed of an axial through hole 11 in the middle, and a plurality of radial through-holes 12 communicating with the axial through-hole 11 are provided on the lower thin-diameter cylindrical section 14. The lower end of the section 14 protrudes to the outside of the lower collar 6 and an annular seal 5 is arranged between the inner ring groove of the lower collar 6 and the lower thin-diameter ...
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