System for assuring engagement of a hydromatic brake on a drilling or well service rig
US7226037B2 · kind B2 · utility
9Cited by
13References
40Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 25, 2004 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Aug 11, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/008
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention provides an automatic system for engaging the hydromatic brake on a drilling rig or a service rig. This system monitors both the hook load and traveling block velocity, and uses an electrical solenoid to activates the hydromatic when either the hook load or rotating drum velocity exceeds a maximum value, requiring hydromatic brake engagement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.