Patent ID: 6012519
Filing Date: 2000-01-11
Classification: E21B

Abstract:
A full bore tubing hanger system for supporting a tubing string in a wellhead, the wellhead having an upper support surface and a vertical opening therethrough, comprising:a hanger body demountably supported on a wellhead and having a lower support surface resting on an upper support surface of the wellhead and having a vertical opening therethrough in alignment with a wellhead vertical opening, the hanger body vertical opening being defined by a first enlarged internal diameter circumferential control recess having upper and lower frusto-conically shaped shoulders, the vertical opening being further defined by a plurality of spaced apart internally projecting circumferential ledges;a tubing hanger having a vertical opening therethrough, the tubing hanger being removably positioned within said hanger body vertical opening and having internal threads at the lower end thereof by which tubing may be threadably attached and supported within a wellhead, the tubing hanger having an integral enlarged external diameter flange portion having an external diameter slightly less than said hanger body internal opening, the tubing hanger being vertically telescopically receivable within said hanger body opening;a segmented cage having an upper end surface and telescopically receiving said tubing hanger, the segmented case having a plurality of spaced apart externally projecting circumferential ledges, when said tubing hanger is downwardly positioned said segmented cage is radially outwardly expanded causing said segmented cage external circumferential ledges to engage said hanger body internal circumferential ledges and said tubing hanger flange portion to engage said segmented cage upper end surface whereby said tubing hanger is vertically supported against further downward displacement relative to said hanger body by said segmented cage, said segmented cage being radially inwardly retracted when upon upward displacement of said tubing hanger whereby said tubing hanger and segmented cage are removable from said hanger body vertical opening.