Taper fitting with protective skirt

Tapered ceramic GC fitting and assembly

Tapered screw joint and device for emergency recovery of boring

Thread coupling for drill string elements for percussive drillin

Thread design for uniform distribution of makeup forces

Thread form for pipe joints

Thread form with multifacited flanks

Thread from with multifacited flanks

Thread joint for a drill string for percussive rock-drilling

Thread joint for tube

Threaded and coupled connection for improved fatigue resistance

Threaded assembly of metal tubes designed to contain a...

Threaded connection

Threaded connection

Threaded connection especially for radially plastically...

Threaded connection for enhanced fatigue resistance

Threaded connection for oil country tubular goods and its...

Threaded connection for pipes and method of fabricating same

Threaded connection of two metal tubes with groove in the...

Threaded connection of two metal tubes with high tightening...