Integrated wellhead tubing string
US5435385A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 29, 1993 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Oct 29, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/127
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In one form of the invention, an integrated wellhead tubing string (100) having a reduced overall height is disclosed, comprising an integrated casing (104) having a first vertical bore (110) therethrough having a first inside diameter, a second vertical bore partially therethrough and having a second inside diameter, the second inside diameter greater than the first inside diameter, a first horizontal bore (108) therethrough in communication with the first vertical bore and a second horizontal bore (132) partially therethrough and in communication with the first vertical bore and positioned above and orthogonal to the first horizontal bore, a blowout preventer (106) comprising horizontally opposed, reciprocable rams disposed within the first horizontal bore, a production tee (128) formed by a threaded coupling (130) disposed on an outer surface of the integrated casing, the threaded coupling being in communication with the second horizontal bore, a stuffing box (134) disposed within the second vertical bore and a stuffing box cap (140) having an outside diameter substantially equal to the second inside diameter, the stuffing box cap disposed so as to extend partially into the seco…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.