Method and system for damping vibrations in a tool string system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 3, 2018
Issued Date -
N/A
app pub date -
Mar 19, 2014
filing date -
Mar 21, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention provides a control system and method for limiting vibrations in a tool string system. The system comprises a pump connected to a rotatable tool string driven by a drive system. The control system comprises feedback of both torque and rotational speed signals into a controller. An objective of said controller is to maintain the drive speed over torque ratio equal to the connected tool string impedance (Z). A secondary objective, for lower frequencies, is to approach and maintain a setpoint speed as drive rotation speed. The system includes a rotational speed sensor and a torque sensor, with the latter optionally replaced by a motor torque signal already available from a variable frequency drive (VFD) for an AC motor and the current safeguarding signal for a DC motor.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully