a new concept drilling hoisting systems rigs
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ID: 182220
2006
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Abstract
In rig constructions two nev designs have been introduced apart from the conventional hoisting system. The first one is the Maritime Hydraulics A.S RamRig© drilling concept, based on hydraulic cylinders as actuators powered by up to 3.4 MW of hydraulic power in a closed loop hydraulic system. This synthesis of the well-known technology allows for the use of integrated active and passive heave compensation, as well as the storing and reuse of energy from the lowering phase of an operation. The RamRig concept makes mechanical brakes and clutches obsolete, since hoisting and lowering of the load is controlled solely by the closed loop hydraulics. This decreases the number of critical mechanical components in the hoisting system to a minimum. Safe handling and emergency shut down of extreme amounts of hydraulic power is taking care of by cartridge valves, which make rerouting of hydraulic power possible with minor losses of transferred effect.The second is a new land rig concept based on a patented rack & pinion drive system with a new generation of rigs which can instantly switch between the workover, drilling and the snubbing operations. The new rig concept has a direct drive, thus no drill line. The mobilization time is reduced as the rig has fewer truck loads, a faster rig up and a higher automation level. One land rig currently under construction will be the world’s first single operator unit, with a full pipe handling capability and a fully automated control system. The rig is fully equipped with the 250 T top drive which can be used for the rotation and snubbing, the purpose designed snubbing slips and other features supporting the multifunctional well operations. The paper will focus on features related to the land rig under construction, and how it may reduce the operational cost and improve the well performance.
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| Authors | ;Jan Artymiuk |
| Journal | comparative biochemistry and physiology toxicology & pharmacology : cbp |
| Year | 2006 |
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