COMPLETION PLUG FOR WELL COMPLETION
This invention relates to a completion plug for well completion, comprising: A first attaching means (204) located between the upper part of a running tool (100) and a safety mean (200); A second attaching means (304) located between the middle part of the running tool (100) and a shearing mean (300); A third attaching means (422) located between the lower part of the running tool (100) and an equalizing mean (400) having an equalizing port (430) inside it; Wherein, in one embodiment, the completion plug is configured to equalize the well pressure by releasing the first attaching means (204) so that the equalizing shear sub (202) will reduce impact force between the equalizing means (400) and the inner of the running tool (100); and wherein the second attaching means (304) releases the running tool (100) to press an equalizing prong housing (450) connected to the lower end of the running tool (100) down in order to open the equalizing port (430) for equalizing pressure between the upper and the lower of the well. In another embodiment, the completion plug is configured to close the well by releasing the first attaching means (204) so that the equalizing shear sub (202) will reduce impact force between the equalizing means (400) and the inner of the running tool (100); and wherein the third attaching means (422) releases the equalizing means (400) from the running tool (100) in order to make the bottom sub (500) close the well when the well is not in use for production.