초록 ▼

A bridge plug assembly 10 contracts radially inwardly to pass through tubing string T and then expands radially outwardly in response to axially compressive forces to set within a casing string C. Upper and lower independently moveable slips 52 and 54 of the anchor mechanism 12 engage casing C. The

A bridge plug assembly 10 contracts radially inwardly to pass through tubing string T and then expands radially outwardly in response to axially compressive forces to set within a casing string C. Upper and lower independently moveable slips 52 and 54 of the anchor mechanism 12 engage casing C. The packoff mechanism 14 includes a plurality of upper sealing members 160, 162, 164 and a plurality of lower sealing members 166, 168, 170 having varying elasticity such that at least some of the sealing members overlap other sealing members when the bridge plug 10 is compression set in the casing C. The bridge plug assembly 10 is retained in a contracted position for passing downwardly through tubing T, then expanded for sealing engagement with casing C. The bridge plug 10 may be run-in with a setting tool ST and may be subsequently released by a releasing tool RT to drop within the well.

대표청구항 ▼

A compression set bridge plug positionable within a wellbore from a wellbore transport member, the bridge plug comprising: a slip cage supported from the wellbore transport member; a first body portion and a second body portion each moveable with respect to said slip cage; a first plurality of slidi

A compression set bridge plug positionable within a wellbore from a wellbore transport member, the bridge plug comprising: a slip cage supported from the wellbore transport member; a first body portion and a second body portion each moveable with respect to said slip cage; a first plurality of sliding members secured to said first body portion, each of said first plurality of sliding members being slidably movable with respect to others of said first plurality of sliding members between a set position and an unset position; a second plurality of sliding members secured to said second body portion, each of said second plurality of sliding members being slidably movable with respect to others of said second plurality of sliding members between a set position and an unset position; a first plurality of slip members each being radially moveable between a set position and an unset position in response to slidable movement of the first plurality of sliding members; a second plurality of slip members each being radially movable between a set position and an unset position in response to slidable movement of the second plurality of sliding members; a plurality of elastomeric sealing members radially movable between a set position for sealing engagement with the interior surface of the wellbore and an unset position; and a releasable connection for releasing said bridge plug from said wellbore transport member when said first and second slip members and said plurality of sealing members are in a set position.