Hydraulic control of borehole tool deployment
US10435969B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2013 |
| Grant date | Oct 8, 2019 |
| Priority date | — |
| Expiry date | Oct 31, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B3/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A control mechanism for a drill string tool is configured to activate the drill string tool by hydraulically actuated movement of the switching element to an activated position, with drilling mud serving as actuating medium. Movement of the switching element to the activated position is automatically regulated, so that tool activation is conditional upon application of above-threshold downhole drilling fluid conditions for at least a predetermined switching duration. A switch regulator that regulates movement of the switching element to the activated position can be configured to regulate a rate of movement of the switching element such that a substantially constant switching duration is maintained regardless of fluctuations in the magnitude of an actuating pressure differential during above-threshold downhole drilling fluid conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.