SPOOL FOR PRESSURE CONTAINMENT USED IN RIGLESS WELL COMPLETION, RE-COMPLETION, SERVICING OR WORKOVER

摘要

An apparatus for rigless subterranean wellcompletion, re-completion, servicing or workover includesat least two substantially vertically oriented doubleacting prime movers incorporated into a spool for pressurecontainment, which is mounted to the top of a wellhead.The spool further includes a Bowen union mounted to a topthereof for sealingly connecting an annular adapter, whichprovides a seal between the.well bore and a tubular that isinserted under the well fluid pressure into the well by theprime movers. The spool may further include a mechanismfor securing a hydraulic crane that can be temporarilymounted to the top of the spool to hoist equipment andtools above the wellhead when the prime movers are used tosupport heavy workloads induced by well fluid pressure orthe weight of a tubing string. The apparatus can be usedin various operations for well completion, re-completion,servicing or workover without the necessity of using aservicing rig. Consequently, the cost of those operationsis significantly reduced.