Disconnect information and monitoring system for dynamically pos

Details Disconnect information and monitoring system for dynamically pos Disconnect information and monitoring system for dynamically pos

1997-10-14

1999-11-02

McElheny, Jr., Donald E.

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Earth science

701116, G06F 1900

Patent

active

059787392

ABSTRACT:
A disconnect information and monitoring system for a dynamically positioned offshore drilling rig at an ocean surface rig location over a wellhead on the sea floor. The system includes a data processing computer, a GPS monitor, a flex joint angle monitor, a slip joint stroke position monitor, and signal equipment to feed signals from the GPS monitor, the flex joint angle monitor, and the slip joint stroke position monitor to the data processing computer. The computer is programmed with software to analyze signal data from the GPS monitor, the flex joint angle monitor and the slip joint stroke position monitor and to present the results of the analysis on the computer monitor so as to provide visual guidance to operators of the rig. In a preferred embodiment a riser top angle monitor and signal equipment for feeding signals from the riser top angle monitor to the data processing computer is also provided. In this preferred embodiment the computer is further programmed display on a computer monitor a symbol representing the rig position relative to the wellhead and to display on the monitor symbols representing limits beyond which the rig should not travel to avoid damage to drill equipment. Another preferred embodiment provides a system and method for determining the curvature profile of the riser.

REFERENCES:
patent: 4317174 (1982-02-01), Dean
patent: 4712620 (1987-12-01), Lim et al.

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