Cat shaft and coring reel group ( drilling rig ) – Readyzone

Cat shaft and coring reel group The cat shaft and coring reel group comprises the cat heads, the cat shaft assembly and the coring reel drum( Figure 1 ). The cat heads are spool-shaped, rotating drums powered by the jack shaft assembly. They consist of friction and mechanical rotating heads. The friction cat heads are used to transport heavy objects…

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Derrick ( drilling rig ) – Petroleum Industry – Readyzone

Derrick The conventional derrick is a four-sided truncated pyramid ordinarily constructed of structural steel, although tubular steel is used infrequently for certain parts of the derrick. Derricks may be either portable or nonportable, the portable derrick being commonly referred to as a mast. The nonportable derrick is usually erected by bolting the structural members together. After the well has been…

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