Multi-piston hydrostatic setting tool with locking feature and pressure balanced pistons
US9068413B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 2012 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Aug 17, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1295
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hydraulically actuated setting tool has a plurality of pistons that move in tandem when unlocked. The pistons are initially in pressure balance to take a load off a single locking mechanism that retains all the pistons. The pistons move due to admission of hydrostatic and/or applied pressure from the annulus on one side of each piston with an opposite side exposed to atmospheric pressure. The locking member is exposed to the annulus and is located away from any atmospheric chambers associated with the pistons. In this manner the components can be made thicker to resist burst and collapse pressure and the loads on the locking member reduced due to initial piston pressure balance configuration. Depths of greater than 8,000 meters can be used due to one or more of the described design features.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.