| CPC E21B 33/134 (2013.01) [E21B 43/26 (2013.01)] | 1 Claim |
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1. An all-metal bridge plug with a sealing ball adapted to casings with various specifications, comprising a pull rod; wherein an upper end of the pull rod is connected with a seating tool, and a locking cap is connected with an upper end of the pull rod through a thread, a lower end of the pull rod is connected with a base through the thread; and
an upper cone, the sealing ball, a metal sealing ring, a locking joint, a lower cone, a slip spider, and the base are manufactured from magnesium-based and aluminum-based dissolvable metal materials that dissolve automatically after fracture is completed;
the pull rod is located in an axial axis, and the locking cap, the upper cone, the metal sealing ring, the locking joint, the lower cone, and the slip spider are sleeved on the pull rod sequentially from left to right along an axial direction of the pull rod;
the upper cone is a cylindrical structure that includes an upper end portion and a lower end portion, wherein an outer surface of the upper end portion is an outer cylindrical surface, the upper end portion is provided with a first inner conical hole, a first inner circular hole, and a second inner circular hole sequentially inside; a circular hole structure is provided between the outer cylindrical surface and the inner circular hole for placing the sealing ball, a size of the circular hole structure being smaller than a size of the sealing ball; an outer surface of the lower end portion is an outer conical surface, and the lower end portion is provided with a second inner conical hole, a third inner circular hole, and an inner thread sequentially inside; the first inner conical hole is sleeved on the locking cap;
the metal sealing ring is a cylindrical structure whose outer surface is a cylindrical surface, wherein an upper end inner hole is an inner conical surface sleeved on the outer conical surface of the upper cone, the inner conical surface and the first outer conical surface having a same cone angle and are fitted with each other; an upper outer cylindrical surface is provided with a plurality of first grooves, and a lower end inner portion is a circular hole;
the locking joint is a cylindrical structure whose outer surface is provided with an outer thread, there is a broken groove between the outer surface and the inner hole, and an upper end portion of the outer thread is connected with the lower end portion of the upper cone;
the lower cone is a cylindrical structure whose outer side is provided with a boss structure on the upper end portion, an outer cylindrical surface, and a conical surface on the lower end sequentially; the boss structure is abutted against the lower end portion of the metal sealing ring, and the outer conical surface is clamped within the slip spider; an upper inner hole is provided with the thread, which is connected with the thread at the lower end of the outer thread of the locking joint;
the slip spider is a cylindrical structure whose upper end inner portion is a conical hole, the slip spider is sleeved on the outer conical surface of the lower cone, and the conical hole is fitted to the conical surface of the lower cone; the slip spider is provided with a plurality of incisions uniformly disposed in a circumferential direction, and a plurality of grooves are provided on the lower end surface of the slip spider; and
the base is a cylindrical structure provided with the threads on the inner surface, the upper end surface is provided with the bosses whose count is the same with a count of the grooves on the lower end surface of the slip spider, and the thread on the inner surface is connected with the thread on the lower end of the pull rod.
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