|
CA1223002A
|
|
Clamp and insert for clamping drilling tubulars
|
|
US4509606A
|
|
Axial return hammer
|
|
CA1179321A
|
|
Lifting apparatus for handling down-hole tubulars
|
|
US4522439A
|
|
Automatic pipe elevator
|
|
CA1198411A
|
|
Drilling apparatus
|
|
US4511169A
|
|
Self locking and unlocking elevator assembly
|
|
US4533055A
|
|
Storage rack for drilling tubulars
|
|
US4406098A
|
|
Drilling ramp
|
|
US4475607A
|
|
Clamp and insert for clamping drilling tubulars
|
|
US4407373A
|
|
Collapsible pedestal for drilling apparatus
|
|
US4403666A
|
|
Self centering tongs and transfer arm for drilling apparatus
|
|
US4366606A
|
|
Self-centering clamp for down-hole tubulars
|
|
US4403897A
|
|
Self-centering clamp for down-hole tubulars
|
|
US4407629A
|
|
Lifting apparatus for down-hole tubulars
|
|
US4314611A
|
|
Apparatus for supporting and rotating a down hole tubular
|
|
US4280535A
|
|
Inner tube assembly for dual conduit drill pipe
|
|
US4303270A
|
|
Self-centering clamp
|
|
US4168755A
|
|
Nutating drill bit
|
|
US4171187A
|
|
Air injection sub
|
|
US4274497A
|
|
Skirted hammer sub for dual tube drilling
|
