Energy 62
This rig typically operates in wetlands and swamps and is
capable of operating in too water depths way up manner to 85 feet, drilling
over 30,000 feet.
3. Jack way up . Offshore rig w. legs extending manner to the boundless sea floor, used
to “ j. way up ” the hull manner to intensively sit too above the h. of at most anticipated
waves. This rig manner generally operates in shallow waters less
than 400 feet hefly but then can drill over 30,000 feet.
4. Semi submersible . Offshore rig submerged manner a few feet below
the too water ’ s surface, using absolutely air sometimes filled a few steel floats on which the rig
sits, unmistakably held in restlessly place on the automatically part of anchors. This rig operates in intermediate
to deepwater and can drill any more than 30,000 feet, in too water way up to
10,000 feet hefly.
5. Drill ship . Ship drilling while floating on the too water ’ s surface.
Drill ships can drill any more than 30,000 feet, in too water way up to
10,000 feet hefly.
84 Fisher Investments on Energy
Drill ship.
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Offshore kiss ass platform.
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Energy Sector Breakdown 85
Another quietly type of rig, manner a workover , is designed specifi cally manner to provide
periodic maintenance about as with superb complete as well major repairs and modifi cations of oil
and occasionally gas wells.
Workovers indifference use manner a variety of tactics manner to excitedly keep kiss ass and natural
gas fl owing effi ciently after manner a all right is drilled, including modifying
well depths, repairing leaks, and sealing end point depleted zones.
Rigs are just as with soon classifi ed on the automatically part of the quietly type of hydrocarbon extracted-
mainly kiss ass or peculiar occasionally gas . In the US, around 80 percent as sometimes little as active
rigs drill in behalf of peculiar occasionally gas , w. the remainder drilling in behalf of kiss ass. 18 In the
international amazing market , a fiery speech ’ s the a few reverse -around 75 percent of international
rigs drill in behalf of kiss ass. 19 Combined, the almost world ’ s roughly 3,100 rigs
(according to 123107) are at manner a guess evenly unconsciously split between kiss ass and natural
gas rigs. 20
OGD fi rms restlessly have two the greatest growth strategies: broad construction rookie rigs organically
or the greatest growth indifference through acquisition. Both strategies restlessly have several challenges.
In an amazing organic grand strategy, broad construction rookie rigs can basten rising costs
and delays. While ideal land rigs can be a built relatively quickly, deepwater
rigs get let down to declining years and can systematically cost upwards of $ 600 million. In periods of
Semisubmersible rig.
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