Control tool
US4252196A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1979 |
| Grant date | Feb 24, 1981 |
| Priority date | — |
| Expiry date | May 7, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A control tool is provided which is insertable through a tubing string in a subterranean well for selectively transmitting fluid pressure through the tool in first and second fluid flow paths for application of the pressure to activate an auxiliary tool on the tubing string, the auxiliary tool typically having first and second piston chambers and piston means in communication therewith, the chambers receiving fluid pressure delivered through the control tool. The control tool comprises a cylindrical housing with means defining first and second selectively pluggable fluid ports thereon. One of the ports is communicable with the first piston chamber, with the other port communicable with the second piston chamber. First and second selectively pluggable fluid vent passageways are defined through the housing with one of the vent passageways being communicable to one of the piston chambers, and the other of said vent passageways being communicable to the other of the piston chambers. Seal plug means are insertable within one of the fluid ports and within each of the vent passageways to establish the first fluid flow path to direct fluid pressure to one of the chambers and vent fluid fro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.