Patent ID: 7559364
Filing Date: 2009-07-14
Classification: E21B

Abstract:
1. A bridge plug, comprising: an axially compressible cylinder having a top end and a bottom end, and a plurality of expansion sleeves disposed between said top end and said bottom end, each expansion sleeve having upper and lower coupling portions and an annularly protruding sealing portion between the coupling portions; a threaded mandrel extending axially through said cylinder, the mandrel having a drive engaging head disposed above the top end of the cylinder and a threaded end extended through and threadably engaged with the bottom end of said cylinder, such that rotation of the mandrel causes the bottom end of said cylinder to travel along the mandrel; at least one coupling member disposed on the top end of said cylinder, the coupling member being configured to be removably engaged with a setting tool; wherein when said mandrel is turned in a first direction said top and bottom ends are drawn together to compress said expansion sleeves such that said sealing portions are expanded outward.