Duel completion bop centralizer
US6374914B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2000 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | May 17, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/047
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A centralizer for guiding a well servicing tool through the bore of a BOP stack or the like and into a radially eccentric position within a wellhead assembly, the centralizer comprising a mandrel having a top end which is connected to a running string and a bottom end to which the well servicing tool is connected, a collar having at least one eccentric hole through which the mandrel extends, the collar being rotatably connected to the mandrel, and an energy absorbing bumper supported above the collar and having at least one opening in alignment with the hole in the collar through which the top end of the mandrel projects; wherein the distance between the center of the collar and the center of the eccentric hole is selected to correspond to the radial distance between the center of the BOP bore and the eccentric position within the wellhead assembly; and wherein the outer diameters of both the collar and the bumper are selected to be only slightly smaller than the diameter of the BOP bore; such that the collar and the bumper will maintain the mandrel, and thus the tool, in alignment with the eccentric position as the tool is being run into the wellhead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.