Patent ID: 6131656
Filing Date: 2000-10-17
Classification: E21B

Abstract:
A bridge plug for use in a well bore for engagement with the wall of a tubing extending down the bore, said bridge plug comprising:a mandrel having an elongated body extending along a longitudinal axis of the tubing;sealing means disposed on said mandrel for sealingly engaging the tubing wall, said sealing means including at least one sealing element wherein said sealing element is expandable radially outwardly to engage the tubing wall when said element is compressed;anchoring means for locking the bridge plug in the tubing, said anchoring means being disposed on said mandrel and including first and second sleeves being axially movable relative to one another and having radially inwardly sloped first and second ramps respectively, said ramps defining a recess therebetween; and at least one anchoring member fitting said recess and having complementary sloped ramps; said first and second ramps cooperating to force said anchoring member radially outwardly into engagement with the tubing wall upon axial movement of said first ramp towards said second ramp;ratchet means disposed on said mandrel for locking said sealing means and said anchoring means in engagement with the tubing wall;an upper housing assembly axially slidably disposed on said mandrel, at least a portion of which is slidable towards said anchoring means and said sealing elements for compressing said sealing elements into engagement with the tubing wall and for moving said first ramp towards said second ramp forcing said anchoring members into anchoring engagement with said tubing wall, the upper housing assembly being shaped and constructed to unlock said ratchet means and disengage said sealing elements and the anchoring members upon axial movement of at least a portion of said housing assembly away from the anchoring means.