Wellhead production pumping tree with access port
US6736208B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2002 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Apr 23, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/0407
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In an integral production pumping tree, the bottom connection, blow-out preventer, flow tee and top connection are positioned to one side, with the vertical rod bore off-center. Up to three vertical ports are provided in the other side of the tree, for providing access to the production casing bore for an electric heating string, an instrumentation string and a small diameter injection tubing string. The ports accommodate sealed connection assemblies, from which the strings extend. The upper portion of the other side of the tree is cut away to create space for introducing the connecting assemblies. The tubing hanger is provided with matching bores.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.