SYSTEM FOR HOISTING A LOAD ON AN OFFSHORE DRILLING RIG

There is described a system (1) for hoisting load on an offshore drilling rig, the system (1) comprising: - a hoisting means including an elongated hoisting member (3) and an elongated hoisting member drive means (5); - a drill string rotation means (7) suspended from an end of said elongated hoisti...

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Bibliographische Detailangaben
Hauptverfasser:	BOROY, YNGVAR, ERIKSSON, ANDERS, STRAND, THOR, TEIXEIRA, ANIBAL B
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Beschreibung
Zusammenfassung:	There is described a system (1) for hoisting load on an offshore drilling rig, the system (1) comprising: - a hoisting means including an elongated hoisting member (3) and an elongated hoisting member drive means (5); - a drill string rotation means (7) suspended from an end of said elongated hoisting member (3); - a support structure (9) having a first side (91) and a second side (93), the support structure (9) being adapted to support at least a portion of the weight said drill string rotation means; and - a first elongated hoisting member guiding means (11) connected to said support structure (9), said elongated hoisting member (3) being reeved over said elongated hoisting member guiding means (11) from said from said first side (91) to said second side (93) of the support structure (9), wherein: - said drill string rotation means (7) is suspended from said elongated hoisting member (3) at said first side of the support structure (9); and - the system further comprises a counterweight (15) connected to said elongated hoisting member (3) at said second side (93) of the support structure (9). L'invention concerne un système (1) pour lever une charge sur une plate-forme de forage en mer, le système (1) comprenant : -un moyen de levage incluant un élément de levage allongé (3) et un moyen d'entraînement d'élément de levage allongé (5) ; - un moyen de rotation de train de tiges de forage (7) suspendu à une extrémité dudit élément de levage allongé (3) ; - une structure de support (9) ayant un premier côté (91) et un second côté (93), la structure de support (9) étant adaptée pour supporter au moins une partie du poids dudit moyen de rotation de train de tiges de forage ; et un premier moyen de guidage d'élément de levage allongé (11) relié à ladite structure de support (9), ledit élément de levage allongé (3) étant passé sur ledit moyen de guidage d'élément de levage allongé (11) dudit premier côté (91) vers ledit second côté (93) de la structure de support (9), dans lequel : -ledit moyen de rotation de train de tiges de forage (7) est suspendu à partir dudit élément de levage allongé (3) sur ledit premier côté de la structure de support (9) ; et - le système comprend en outre un contrepoids (15) relié audit élément de levage allongé (3) sur ledit second côté de la structure de support (9).