Surge anchor assembly

Details Surge anchor assembly Surge anchor assembly

1999-01-15

2000-11-28

Schoeppel, Roger

Wells

Processes

Placing or shifting well part

166117, 166123, 166134, 166137, 166182, 166211, 166215, 166216, 166217, E21B 2300

Patent

active

061522333

ABSTRACT:
The present invention is a surge anchor mechanism which includes 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.

REFERENCES:
patent: 4122899 (1978-10-01), Brieger
patent: 4345649 (1982-08-01), Baugh et al.
patent: 4375834 (1983-03-01), Trott
patent: 4415029 (1983-11-01), Pratt et al.
patent: 4518037 (1985-05-01), Youngblood et al.
patent: 5103902 (1992-04-01), Ross et al.
patent: 5131468 (1992-07-01), Lane et al.
patent: 5146993 (1992-09-01), Gambertoglio
patent: 5700968 (1997-12-01), Blimke

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