string assembly as flexible drill string member 16 rotates self aligning sleeve 10 remains stationary with first protrusion means 18 communicating with the high side of borehole 40 and second protrusion means 20 communicating away from the high side preferably with the lateral side of borehole 40 gravitational forces on first protrusion means 18 and second protrusion means 20 allow self aligning sleeve 10 to resist the rotation of flexible drill string member 16 as weight is applied to the drill string assembly flexible drill string member 24 arcuates in the direction of the low side of borehole 40 as the upper and lower ends of flexible drill string member 24 are pressed between restraining means 22 and stabilizing means 26 blades 28 of stabilizing means 28 acts as a fulcrum that is it absorbs the weight and assists in the arcuation of flexible drill string member 24 as flexible drill string member 24 arcuates stabilizing means 28 turns drill bit 30 in the correct direction two variations in the shape of protrusion means 18 and 20 have been determined to improve the operational efficiency of self aligning sleeve 10 the first variation seen in fig8 and 9 utilizes a first protrusion means 52 which is symetrical and oval shaped as described above first protrusion means 52 provides the self aligning action of sleeve 10 when in the borehole due to normal gravitational effect which causes the off center weight of first protrusion means 52 to let the upper drill colars go toward.