Sequential hydraulic control system for use in a subterranean well
US7145471B2 · kind B2 · utility
19Cited by
30References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2000 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Apr 14, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B13/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sequential hydraulic well control system provides actuator selection and operation utilizing pressure applied to hydraulic lines in a sequence. In a disclosed embodiment, an actuation control device of a well control system includes multiple pistons, at least one of which is included in a latch for selectively permitting and preventing displacement of another of the pistons. When one of the pistons displaces in response to pressure applied sequentially to hydraulic inputs of the control device, an associated actuator is placed in fluid communication with the inputs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.