Bridge plug capable of being salvaged after fracturing
A post fracturing, bridge plug technology, used in wellbore/well components, earthwork drilling, sealing/packing, etc. Simple operation method
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Embodiment 1
[0026] Such as figure 1 with figure 2 As shown, the bridge plug that can be salvaged after fracturing provided by the embodiment of the present invention is used in conjunction with the bridge plug attachment. The bridge plug attachment is composed of a central pipe 1A and a setting pusher 1B. One end of the central pipe 1A is connected to Seal push cylinder 1B, the bridge plug accessory is lowered by central pipe 1A and set by setting push cylinder 1B to seal off the reconstructed well section.
[0027] The salvageable bridge plug after fracturing includes a bridge plug body 9, and the bridge plug body 9 includes a ball seat 2, a sealing rubber cylinder 3, a setting cylinder 4, Slips 5 and salvage base 6. The ball seat 2, the setting cylinder 4 and the salvage base 6 are all ring-shaped, and a folding part 8 is arranged inside the ring.
[0028] When working, after the bridge plug and the bridge plug accessories are lowered to the predetermined position by the cable, the ...
Embodiment 2
[0032] On the basis of Example 1, the upper end surface of the ball seat 2 is closely attached to the lower end surface of the setting push cylinder 1B; the lower end surface of the ball seat 2 is closely attached to the upper end surface of the sealing rubber cylinder 3 Fitting; the end of the ball seat 2 close to the setting push cylinder 1B is provided with an inner groove surface 2A for placing a soluble fracturing plug. The inner surface of the lower end of the sealing rubber cylinder 3 is in close contact with the outer surface of the upper end of the setting cylinder 4; The lower end of the sealing cylinder 4 is provided with a lower outer conical surface 4B, and the lower outer conical surface 4B is provided with the slip 5; the lower end surface of the slip 5 is closely attached to the upper end surface of the salvage base 6; Said salvage base 6 is fixed together with said center pipe 1A through connecting pin 7, so that during the process of lowering the bridge plug,...
Embodiment 3
[0034] On the basis of Example 1, such as Figure 1 to Figure 4 As shown, the folding member 8 can only be folded in one direction. That is to say: during the process of putting in and setting the bridge plug, the ball seat 2, the setting cylinder 4 and the folding part 8 on the salvage base 6 are not deformed under the downward thrust; during the process of salvaging the bridge plug, the ball seat 2, the seat The envelope 4 and the folding member 8 on the salvage base 6 are folded under the upward pulling force.
[0035] Such as Figure 3 to Figure 4 As shown, there may be multiple folded parts between the bridge plug body 9 and the central pipe 1A. Symmetrical setting is preferred, so that the force is even and the folding process is smoother.
[0036] Each of the folding parts 8 is composed of an inner hinge piece 11 and an outer hinge leaf, and the inner hinge piece 11 and the outer hinge piece 12 are connected by a rotating shaft 13 . The lengths of the inner hinge piec...
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