Scratcher

18 July 2017

Semisubmersible drilling rig

18 July 2017

Scratcher

18 July 2017

Semisubmersible drilling rig

18 July 2017

Secondary cementing

Any cementing operation after the primary cementing operation. Secondary cementing includes a plug-back job, in which a plug of cement is positioned at a specific point in the well and allowed to set. Wells are plugged to shut off bottom water or to reduce the depth of the well for other reasons.