Drilling speed increasing device driven by downhole motor for generating shock vibration
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United States of America Patent
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Feb 23, 2021
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N/A
app pub date -
Feb 28, 2020
filing date -
Jan 17, 2018
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Abstract
The present invention discloses a drilling speed increasing device driven by a downhole motor for generating shock vibration. The device uses the rotational energy of a screw motor as power to drive a lower vibration starter to rotate. Vibration starting steel balls have the function of reducing friction in the interior. During axial reciprocating motion of the upper vibration starter, a spring matched with the upper vibration starter is periodically compressed to generate spring energy. The spring energy reacts on the lower vibration starter and a main shaft connected with a drill bit, so as to periodically provide drilling pressure for the drill bit. Periodic motion of the upper vibration starter and the spring produces periodic axial vibration on the tool.
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