Apparatus for perforating casings and well walls

Apparatus for perforating well casings by means of shaped...

Apparatus for plugging well bores with hardenable fluent...

Apparatus for plugging well bores with hardenable fluent...

Apparatus for plugging well bores with hardenable fluent...

Apparatus for pneumatically monitoring conditions of a well...

Apparatus for positioning a tong and drilling rig provided...

Apparatus for positioning a tong and drilling rig provided...

Apparatus for preventing an uncontrolled increase in the...

Apparatus for preventing differential sticking in wells

Apparatus for preventing separation of a down-hole motor...

Apparatus for providing a packaged core

Apparatus for providing ducts through casing in a well

Apparatus for pulling drill pipe

Apparatus for radial expansion of a tubular

Apparatus for radially expanding and plastically deforming a...

Apparatus for radially expanding and plastically deforming a...

Apparatus for radially expanding and plastically deforming a...

Apparatus for radially expanding and plastically deforming a...

Apparatus for radially expanding and plastically deforming a...