초록 ▼

A well tubular is hung within a casing through placement of the tubular in overlapping relationship with the casing. A spacer may be located therebetween. The tubular is expanded which in turn expands the spacer when used. The tubular is expanded beyond the yield point such that it or an intervening

A well tubular is hung within a casing through placement of the tubular in overlapping relationship with the casing. A spacer may be located therebetween. The tubular is expanded which in turn expands the spacer when used. The tubular is expanded beyond the yield point such that it or an intervening spacer engages the inside of the casing and stresses the casing within its elastic limits. The assembly then contracts to form a tight structural support between the tubulars and a high pressure seal against flow therebetween. A spacer having channels about either end with ductile sealing material therein is of an expanded metal material through cuts in the sheet. A hydraulic ram is employed with an expandable collet to draw the collet through the overlapping area of the liner and the casing. The collet extends within a shoulder at the end of its stroke such that it will be substantially released from the upper end of the liner. A method for placing a lateral liner includes expanding the liner to beyond its yield point within the hole through the casing. The stub of the liner positioned within the casing may then be drilled out such that completed lateral and main bores are achieved.

대표청구항 ▼

[ What is claimed is:] [1.] A method for hanging a first tubular assembly in a second tubular positioned in a well, comprisingplacing the first tubular assembly within the second tubular in an overlapping relationship with the first tubular assembly extending into the well from the second tubular;ho

[ What is claimed is:] [1.] A method for hanging a first tubular assembly in a second tubular positioned in a well, comprisingplacing the first tubular assembly within the second tubular in an overlapping relationship with the first tubular assembly extending into the well from the second tubular;holding the first tubular assembly in place;expanding at least a portion of the first tubular assembly overlapping with the second tubular, which portion is substantially circular in cross section without longitudinal slits therethrough, partially or fully circumferentially past the yield point including drawing a swedge through the portion and expanding the second tubular adjacent the portion of the first tubular assembly partially or fully circumferentially through expansion of the first tubular assembly, the expanding being sufficient that elastic recovery for the first tubular assembly is less than elastic recovery for the second tubular to retain the first tubular assembly in circumferential compression and the second tubular in circumferential tension;removing the swedge from the first tubular assembly.