SURGE ANCHOR ASSEMBLY

摘要

The present invention is a surge anchor mechanism which comprises a main body, lower unit slidable in relation to the main body, and slip members. The slip members have at least one inclined end surface. The lower unit has an inclined surface forming a frustoconical shape wherein the slope of the surface complements the inclined end surface of the slip member. The lower unit is aligned along the axis of the main body and movable in relation to the main body along this axis. The slip members are biased towards the lower unit and movable transversely in relation to the axis of the lower unit. As a surge occurs in the well, the lower unit and the main body are forced towards each other. This causes the inclined surface of the lower unit to cooperate with and move along the corresponding inclined surface of the slip member forcing the slip member outward from the lower unit and into engagement with the well casing. As the surge passes, the lower unit returns to its lowered starting position allowing the slip member to disengage the well casing and return to a resting position.