UNCOUPLING DEVICE FOR CONNECTING A DRILLING TOOL TO THE END OF A DRILLING COLUMN AND A DRILLING SYSTEM COMPRISING SUCH AN UNCOUPLING DEVICE
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United States of America Patent
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Issued Date -
Feb 12, 2015
app pub date -
Jun 20, 2012
filing date -
Jun 22, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Collection device for connecting a drilling tool, such as a bit, to the end of a drilling column, in which the connection device comprises a first element, with a first end, intended to be connected to the end of the drilling column, and a second element, with a second end, intended to be connected to the drilling tool, in which the second element is fixed to the first element so as to allow a translational movement in a longitudinal direction in order to make it possible to change the distance between the first end and this second end, characterized in that the connection device comprises a “pusher” structure for transmitting a thrust force from this first element towards the second element, comprising a set of “Belleville” washers making it possible to ensure that said thrust force, from the first element toward the second element, is substantially constant in any position of the second element with respect to the first element.
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