Self-drilling dowel assembly with an annular drill bit
Self-drilling dowel with drill head
Self-drilling thermal bolt
Self-lubricating, fluid-actuated, percussive down-the-hole drill
Self-sinking, axial passage foundation pile and method
Service module for hostile environment
Single acting hydraulic fishing jar
Sleeve valve hydraulic jar tool
Soil displacement hammer with movable head
Spline drive for percussion drilling tool
System and method for installing production casings
System and method for installing production casings