| 摘要 |
A drill stem connection assembly includes a first drill stem section and a second drill stem section. At least one engaging feature is located at an end of the first drill stem section. At least one mating feature accepts the at least one engaging feature. The at least one mating feature is located at an end of the second drill stem section. Coupling of the respective ends of the first and second drill stem sections forms a drill stem joint. A threaded collar engages with at least one of the coupled first and second drill stem sections. When placed in a securing position, the threaded collar holds the engaging feature securely mated with the mating feature and at least partially covers the drill stem joint.
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