Patent ID: 7562705

Claim:
A packer cup for sealing an annular space between a tubular body and a well pipe comprising: an elastomeric and annular mounting portion adapted for positioning to the tubular body and axially moveable therealong; an elastomeric and annular skirt extending axially downhole from the annular mounting portion and adapted to engage the well pipe to seal the annular space, the annular skirt having a normal unrestrained outer diameter being greater than an inner diameter of the well pipe, and an inner side wall having a radially outwardly, generally V-shaped profile which deflects radially inwardly when engaged with the well pipe, opening between a bottom end of the skirt and the tubular body; a rigid sleeve securely inset within the annular mounting portion and sealably slidable adjacent the tubular body, the sleeve having an upper radial compression surface forming an annular recess between an uphole end of the sleeve and the tubular body and having an uphole portion of the annular mounting portion extending into the annular recess; and wherein, when the packer cup is entering and exiting the well pipe the inner side wall of the annular skirt radially collapses; and when exposed to downhole pressures, the annular skirt flares to seal to the well pipe and the annular mounting portion moves axially uphole along the tubular body, said movement axially compressing the uphole portion of the annular mounting portion into the annular recess for sealing therein.