Multipurpose active/passive motion compensation system
Conference
·
· Proc., Annu. Offshore Technol. Conf.; (United States)
OSTI ID:6418162
A microprocessor-controlled active/passive motion compensation system has been developed for deploying a variety of geotechnical in-situ testing devices with mobile drilling rigs from low-cost service vessels. The light-weight rotary heave compensator incorporates a hydraulic motor as the compensator actuator and a servo-controlled closed loop pump to reduce the air storage and power requirements. Unique features of the system are the use of inertial sensors to measure three components of boat motion, the ability to run the system in active/passive or passive modes, and the ability to automatically lower the drillstring at a constant velocity while maintaining motion compensation. Quantitative measurements made during sea trials offshore California yielded motion compensation accuracy approaching 98 percent which is much better than the compensation achieved with passive systems. Results are presented from offshore in-situ testing with a cone penetrometer, a vane shear device, and a suspension PS logger. The system can also be used for other offshore applications.
- Research Organization:
- Woodward-Clyde Oceaneering
- OSTI ID:
- 6418162
- Report Number(s):
- CONF-8405208-
- Conference Information:
- Journal Name: Proc., Annu. Offshore Technol. Conf.; (United States) Journal Volume: 2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
42 ENGINEERING
423000 -- Engineering-- Marine Engineering-- (1980-)
ACCURACY
COMPUTERIZED CONTROL SYSTEMS
COMPUTERS
CONTROL EQUIPMENT
CONTROL SYSTEMS
COST
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
DRILLING RIGS
ELECTRONIC CIRCUITS
EQUIPMENT
HOISTING
HYDRAULIC EQUIPMENT
MATERIALS HANDLING
MEASURING INSTRUMENTS
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
MOTORS
OFFSHORE DRILLING
PENETROMETERS
PIPES
PUMPS
SEISMIC WAVES
SERVOMECHANISMS
SONIC LOGGING
TESTING
VELOCITY
WELL LOGGING
WELL LOGGING EQUIPMENT
020300* -- Petroleum-- Drilling & Production
42 ENGINEERING
423000 -- Engineering-- Marine Engineering-- (1980-)
ACCURACY
COMPUTERIZED CONTROL SYSTEMS
COMPUTERS
CONTROL EQUIPMENT
CONTROL SYSTEMS
COST
DRILL BITS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
DRILLING RIGS
ELECTRONIC CIRCUITS
EQUIPMENT
HOISTING
HYDRAULIC EQUIPMENT
MATERIALS HANDLING
MEASURING INSTRUMENTS
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
MOTORS
OFFSHORE DRILLING
PENETROMETERS
PIPES
PUMPS
SEISMIC WAVES
SERVOMECHANISMS
SONIC LOGGING
TESTING
VELOCITY
WELL LOGGING
WELL LOGGING EQUIPMENT