Wellhead system for exploratory wells
US4387771A · kind A · utility
49Cited by
7References
10Claims
0Family size
Inventor
Key dates
| Filing date | Feb 17, 1981 |
| Grant date | Jun 14, 1983 |
| Priority date | — |
| Expiry date | Feb 17, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/0175
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wellhead (16) for an exploratory well carries a latch profile ring (24) at a location just above the wellhead housing (14). Accessory modules (38) latch onto this profile (36) while leaving the conventional upper latch profile (28) free for conventional production equipment. The accessory module may carry flowline alignment apparatus (40) to use the exploratory well as a satellite well. It may carry cantilever well modules (70) to permit the drilling of adjacent wells or a retrievable guide pile module (43) to provide placement of a guide pile required for proper placing of a jacket for an offshore platform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.