| 摘要 |
An expandable tubular coupling ( 10 ) includes first and second thread portions ( 12,14 ) each comprising a plurality of inter-engaging teeth ( 20,22 ), wherein at least one tooth on the first thread portion ( 12 ) engages a corresponding tooth on the second thread portion ( 14 ) and the remainder of said inter-engaging teeth ( 20,22 ) define respective gaps ( 32 ) therebetween. |
