Device for reducing frictional resistance during drilling based on shape memory alloy spring

The invention discloses a device for reducing frictional resistance during drilling based on a shape memory alloy spring. The device comprises a spline mandrel, a spline sleeve, a body, a reset spring, a mud pulse generator, the shape memory alloy spring and a mud turbine generator. The body is internally provided with a cavity. The reset spring, the mud pulse generator, the shape memory alloy spring and the mud turbine generator are connected and located in the cavity. According to the device, a drill tool is driven to move in a reciprocating mode in a well through the restoring force of theshape memory alloy spring and the elastic force of the reset spring, so that static friction between the drill tool and the well wall is changed into kinetic friction, and thus the frictional resistance between the drill tool and the well wall during sliding drilling is reduced. 本发明公开了种基于形状记忆合金弹簧的钻进减小摩阻的装置，其包括花键芯轴、花键套、本体、复位弹簧、泥浆脉冲发生器、形状记忆合金弹簧以及泥浆涡轮发电机，所述本体内具有腔体，所述复位弹簧、泥浆脉冲发生器、形状记忆合金弹簧以及泥浆涡轮发电机及其连接位于所述腔体内。本发明通过形状记忆合金弹簧的回复力