Choke
US4194718A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1978 |
| Grant date | Mar 25, 1980 |
| Priority date | — |
| Expiry date | Jun 14, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20636
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A choke suitable for use in the wellhead of a production well including a body having an inlet, an outlet and a seat, a valve member or gate adapted to move relative to said seat to restrict flow therethrough, a pressure responsive operator connected to move the gate with respect to the seat, a manual operator connected to said pressure responsive operator, means releasably connecting said manual operator to said gate to manually move said gate and for releasing said manual operator from said gate to allou said pressure responsive operator to move said gate and a control on the exterior of said manual operator connected to said releasable connecting means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.