|
US4069879A
|
|
Pipe handler
|
|
US4126193A
|
|
Mobile drilling apparatus
|
|
US4069840A
|
|
Ball check valve
|
|
US4074774A
|
|
Drilling assembly
|
|
US4013178A
|
|
Pipe racker
|
|
US3958836A
|
|
Movable track assembly for drive tracks
|
|
US4040441A
|
|
Check valve assembly
|
|
US3915244A
|
|
Break out elevators for rotary drive assemblies
|
|
US3916500A
|
|
Pipe handling apparatus
|
|
CA948622A
|
|
Rotary drive connection for casing drilling string
|
|
US3877421A
|
|
Patient lift and exercise apparatus
|
|
US3888318A
|
|
Well drilling apparatus
|
|
US3340928A
|
|
Submarine drilling method
|
|
US3357489A
|
|
Multiple well production packer apparatus and methods of positioning the same
|
|
US3318384A
|
|
Pressure actuated packer and anchor assembly
|
|
US3279542A
|
|
Anchoring means assembly
|
|
US3287776A
|
|
Multiple string manual operated elevator
|
|
US3283821A
|
|
Screw-set packer
|
|
US3299959A
|
|
Multiple string well packer
|
|
US3294172A
|
|
Well tools, such as well packers
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