| 摘要 |
A stabilizer for use in conjunction with a rotating drill string of a rotary drilling rig. The cutting blades of the stabilizer are received in close tolerance relationship within a longitudinally extending slot formed in a main body portion of the stabilizer. The slot outwardly opens and includes opposed sidewalls and opposed ends. The blades have opposed sidewalls and opposed ends and are made complementary respective to the geometrical configuration of the slot. A groove is formed in each sidewall of the slot and in each sidewall of the cutting blade such that when the blade is positioned within the slot, the grooves jointly form spaced cylindrical passageways. A plurality of holding balls fill the passageways and are removably captured therewithin, thereby releaseably securing the blade to the stabilizer body with great force so that the blade cannot inadvertently become lost downhole in a borehole.
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