Patent ID: 7124829

Claim:
A fluid production assembly for use downhole in a wellbore to seal with a casing string and transmit fluid between the casing string and a production string extending upward from the fluid production assembly, the fluid production assembly comprising: a tubular anchor removably supportable on a running tool for positioning the tubular anchor downhole, the tubular anchor having an initial anchor inner diameter, and having an initial anchor outer diameter less than an inner diameter of the casing string, the tubular anchor being expandable by the running tool to seal with the casing string; a tubular expander removably supportable on the running tool, the tubular expander having an expander outermost diameter greater than the initial anchor inner diameter; the running tool including an actuator for forcibly moving the tubular expander axially from a position substantially axially spaced from the tubular anchor to a position substantially within the tubular anchor, thereby radially expanding the tubular anchor against the casing string to secure the tubular expander and the tubular anchor downhole; a sealing sleeve secured to an upper end of the tubular expander and fluidly connecting the casing string, the tubular expander, and through the sealing sleeve; and a seal nipple for sealing with a bore of the sealing sleeve and fluidly connecting the sealing sleeve and the production string.