Method and apparatus for retrieving a running tool/guideframe assembly.

摘要

A method and apparatus for interconnecting a subsea wellhead positioned on an ocean floor with a deck of an above-surface platform, comprising: (a) attaching a plurality of guidepost assemblies (22) to a well template, each said guidepost assembly including i) a guidepost (30) of said ocean wellhead, ii) a guideline (21) which extends from said platform deck to said guidepost, and iii) a releasable element (30) of said guidepost assembly; (b) securing a running tool/guideframe assembly (10) to a riser connector (14) which is itself attached to a leading end of a riser string (16); (c) lowering said riser connector into position above said wellhead by engaging said running tool/guide frame assembly with said plurality of guidepost assemblies; (d) latching said riser connector to a subsea wellhead; (e) disconnecting said releasable element of each said guidepost assembly; (f) permitting a portion of each said guidepost assembly to enage and lift said running tool/guideframe assembly; (g) using said guidelines (21) to retrieve said running tool/guideframe assembly by virtue of said engagement with each said guidepost assembly portion. e