Well drilling apparatus or the like with position monitoring system
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United States of America Patent
Stats
-
Oct 1, 1985
Grant Date -
N/A
app pub date -
Mar 22, 1982
filing date -
Mar 22, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A well drilling apparatus includes a monitoring system for monitoring the exact elevation of the traveling block. The monitoring system detects the elevation of the traveling block by means of periodically transmitted signals which are reflected back to the monitoring system by the traveling block. The apparatus further includes a control system preferably including an industrial control digital computer which is responsive to the elevation of the traveling block and controls the drawworks of the apparatus to prevent the traveling block from crashing into the crown block or working floor. In one embodiment of the apparatus the velocity of travel of the traveling block and the load being supported by the traveling block are also monitored in order to further restrict raising and lowering of the traveling block to be maintained within predetermined safe limits of operation.
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