Methods and apparatus for expanding tubulars

An apparatus for rotationally and axially supporting wellbore tubulars, comprising:

• a first tubular capable of expanding and plastically deforming into contact with an inside diameter of a second tubular, wherein the first tubular has a continuous circumference;
• and
• a split ring for disposal around an outer surface of the first tubular, the split ring having grip-enhancing formations on an outer surface thereof.

A method of expanding a first tubular in a wellbore, comprising:

• running the first tubular into the wellbore, the first tubular having a split ring disposed therearound, wherein the first tubular is run into the wellbore to a location within a second, larger diameter tubular;
• and
• expanding a portion of the first tubular in an area of the split ring, wherein the expanding the portion of the first tubular forms an undulation in a diameter of the first tubular that corresponds to at least a portion of a split portion of the split ring.

A method of expanding a first tubular in a wellbore, comprising:

• running the first tubular into the wellbore, the first tubular having a split ring disposed therearound, wherein the first tubular is run into the wellbore to a location within a second, larger diameter tubular;
• and
• expanding a portion of the first tubular in an area of the split ring, wherein the expanding the portion of the first tubular engages the first tubular with annular formations on an inside diameter of the split ring.

An apparatus for rotationally and axially supporting wellbore tubulars, comprising:

• a first tubular capable of expanding and plastically deforming into contact with an inside diameter of a second tubular;
• and
• a split ring for disposal around an outer surface of the first tubular, the split ring having grip-enhancing formations on an outer surface thereof, wherein the split ring further includes annular formations on an inner surface thereof.