Nightcap assembly for closing a wellhead and method of using same
US11391106B2 · kind B2 · utility
0Cited by
23References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2019 |
| Grant date | Jul 19, 2022 |
| Priority date | — |
| Expiry date | Mar 5, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/106
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A nightcap system and assembly for closing a wellhead assembly positioned about a wellbore. The nightcap assembly includes a boom and a hoist. The boom includes a boom cylinder connectable to the wellhead assembly and a boom piston extendable from the cylinder. The hoist includes a hoist cylinder connectable to the wellhead assembly and a hoist piston extendable therefrom. The hoist piston includes a nightcap support to carry a nightcap. The hoist is connectable to the boom piston and movable therewith whereby the nightcap may be inserted into an opening of the wellhead assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.